Patent Description:
In Release <NUM> (Rel <NUM>) on New Radio (NR), a demodulation reference signal (DMRS) corresponding to a control channel for carrying control information and a DMRS corresponding to a data channel for carrying data are configured separately. When the control channel and the data channel are transmitted in a same time unit, such as a slot, their corresponding DMRSs are configured to be transmitted in respective channels, as illustrated in <FIG>, which illustrates an example of transmitting a Physical Downlink Control Channel (PDCCH) and a Physical Downlink Shared Channel (PDSCH) in a same slot in an NR system.

A sidelink communication, compared with an uplink or downlink communication of the NR system, has a relatively simple control channel format. For example, only one sidelink control information format is defined on LTE-V2X (Vehicle to Everything). In addition, according to LTE-V2X, a sidelink control channel and a sidelink data channel are always transmitted in the same time unit in frequency-division multiplexing (FDM), as illustrated in <FIG>, so as to reduce an impact of half duplex on V2X communication performance.

<CIT> discloses UE for transmission of a DMRS for sidelink communications. The UE includes processing circuit configured to: determine at least one transmission parameter associated with at least one of data transmission and control information transmission, and generate a DMRS using the determined at least one transmission parameter. The UE includes transmitter circuit configured to transmit the DMRS.

<CIT> discloses enhanced sidelink physical channels (PSSCH, PSCCH, PSBCH) for V2X communications using LTE, focusing on improvements in demodulation reference signal (DMRS) sequence generation and mapping, particularly expanding from two to three or four DMRS symbols per subframe to meet performance demands in high-mobility scenarios.

In order to overcome the problems in the related art, the present invention provides sidelink-based transmission methods and apparatuses.

According to a first aspect of the present invention, there is provided a sidelink-based transmission method as defined by claim <NUM>.

According to a second aspect of the present invention, there is provided a sidelink-based transmission method as defined by claim <NUM>.

According to a third aspect of the present invention, there is provided a sidelink-based transmission apparatus as defined by claim <NUM>.

According to a fourth aspect of the present invention, there is provided a sidelink-based transmission apparatus as defined by claim <NUM>.

According to a fifth aspect of the present invention, there is provided a computer-readable storage medium storing a computer program as defined by claim <NUM>.

According to a sixth aspect of the present invention, there is provided a computer-readable storage medium storing a computer program as defined by claim <NUM>.

The technical solutions provided by the present invention may produce the following beneficial effects.

In one or more examples of the present invention, a transmitter may configure a shared demodulation reference signal for to-be-transmitted control information and to-be-transmitted target data, thereby reducing an overhead on demodulation reference signal and improving a utilization rate of frequency spectrum. In addition, the transmitter may use time-division multiplexing to map the control information, the target data, and the demodulation reference signal onto a current time unit, and transmit the control information, the target data, and the demodulation reference signal to a receiver through the time unit, thereby succeeding in transmitting the control information, the target data, and the demodulation reference signal on the basis of time-division multiplexing in a sidelink communication system.

In one or more examples of the present invention, alternatively or additionally, the demodulation reference signal is not included in a time symbol on which the control information is located, and thus the demodulation reference signal may be mapped onto a first target time symbol of the time unit by using time-division multiplexing. The first target time symbol is located between a time symbol onto which the control information is mapped and a time symbol onto which the target data is mapped. During the above process, when the demodulation reference signal is not included in the time symbol on which the control information is located, it can succeed in transmitting the control information, the target data, and the demodulation reference signal on the basis of time-division multiplexing, which has high availability.

In one or more examples of the present invention, alternatively or additionally, the demodulation reference signal may be included in a time symbol on which the control information is located. Accordingly, the control information and the target data may be mapped onto different time symbols of the time unit by using time-division multiplexing. Alternatively or additionally, the transmitter may further map the demodulation reference signal onto at least one second target time symbol of the time unit. The second target time symbol is located between any two time symbols onto which the target data is mapped. Therefore, when the demodulation reference signal is included in the time symbol on which the control information is located, it can succeed in transmitting the control information, the target data, and the demodulation reference signal on the basis of time-division multiplexing.

In one or more examples of the present invention, alternatively or additionally, the demodulation reference signal is not included in a time symbol on which the control information is located, and thus the demodulation reference signal may be mapped onto at least one third target time symbol of the time unit, and then simultaneously map the control information onto a fourth target time symbol and a fifth target time symbol. That is, the control information is mapped onto the time symbols which are before and behind the third target time symbol. Further, the target data is mapped onto at least one sixth target time symbol which is behind the fifth target time symbol or before the fourth target time symbol. Therefore, when the demodulation reference signal is not included in the time symbol on which the control information is located, it can succeed in transmitting the control information, the target data, and the demodulation reference signal on the basis of time-division multiplexing, which has high availability.

In one or more examples of the present invention, the transmitter may also use frequency-division multiplexing to map a part of the target data onto a time symbol on which the demodulation reference signal is located, thereby saving transmission resources. Through the above process, the control information, the target data, and the demodulation reference signal may be transmitted in the sidelink communication by using time-division multiplexing and frequency-division multiplexing simultaneously, which further meets respective requirements of different V2X services.

In one or more examples of the present invention, when time-division multiplexing is used, frequency domain resources occupied by the control information overlap with a part of frequency domain resources occupied by the target data, or the frequency domain resources occupied by the control information overlap with all of the frequency domain resources occupied by the target data. Alternatively or additionally, in the case that the frequency domain resources occupied by the control information overlap with the part of the frequency domain resources occupied by the target data, the transmitter may also map a part of the target data onto a time symbol on which the control information is located. Similarly, the control information, the target data, and the demodulation reference signal are transmitted in the sidelink communication by using time-division multiplexing and frequency-division multiplexing simultaneously, which further meets respective requirements of different V2X services.

In one or more examples of the present invention, the transmitter may adopt a same precoding matrix and a same transmitting beam and transmit the control information, the target data, and the demodulation reference signal to the receiver through the time unit, which saves transmission resources.

In one or more examples of the present invention, a receiver may receive control information, target data, and a demodulation reference signal which are transmitted by a transmitter through a time unit. The target data is associated with the control information, the demodulation reference signal is shared by the control information and the target data, and the control information, the target data, and the demodulation reference signal are mapped onto the time unit by using time-division multiplexing. Further, the receiver may demodulate the control information and the target data respectively from the time unit based on the demodulation reference signal. Therefore, it succeeds in transmitting the control information, the target data, and the demodulation reference signal on the basis of time-division multiplexing in a sidelink communication system.

It should be understood that the above general description and the following detailed description are only exemplary and explanatory and are not restrictive of the present invention.

The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate examples in accordance with the present invention, and together with the specification are used to explain the principle of the present invention.

Examples will be described in detail herein, with the illustrations thereof represented in the drawings. When the following descriptions involve the drawings, like numerals in different drawings refer to like or similar elements unless otherwise indicated. The implementations described in the following examples do not represent all the implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present invention as detailed in the appended claims.

The terms used in the present invention are only for the purpose of describing specific examples, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the present invention and appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should further be understood that the term "and/or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

It should be understood that although the terms first, second, third, etc. may be used in the present invention to describe various information, the information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, first information may be referred as second information; and similarly, second information may also be referred as first information. Depending on the context, the word "if" as used herein can be interpreted as "upon" or "when" or "in response to determining".

In the examples of the present invention, an involved time unit may be such a unit as a subframe or a slot, and an involved time symbol may be an orthogonal frequency-division multiplexing (OFDM) symbol.

Next, sidelink-based transmission methods provided by the examples of the present invention are firstly introduced from a side of a transmitter.

In an example of the present invention, a sidelink-based transmission method is provided and applicable to the transmitter. Referring to <FIG>, which is a flowchart illustrating a sidelink-based transmission method according to the example, the following steps may be included.

At step <NUM>, a demodulation reference signal shared by control information and target data is configured. The target data indicates to-be-transmitted data associated with the control information.

At step <NUM>, the control information, the target data, and the demodulation reference signal are mapped onto a current time unit by using time-division multiplexing.

At step <NUM>, the control information, the target data, and the demodulation reference signal are transmitted to a receiver through the time unit.

In the above example, it succeeds in transmitting the control information, the target data, and the demodulation reference signal on the basis of time-division multiplexing in a sidelink communication system.

With respect to the above step <NUM>, according to the example of the present invention, since a receiver address corresponding to the control information and a receiver address corresponding to the data are identical in the sidelink communication, it may configure the shared demodulation reference signal for the control information and the target data, so as to reduce an overhead of demodulation reference signal and improve a utilization rate of frequency spectrum.

With respect to the above step <NUM>, any one of the following ways may be adopted to map the control information, the target data, and the demodulation reference signal onto the current time unit by using time-division multiplexing.

In the first way, the demodulation reference signal is not included in a time symbol on which the control information is located, and is mapped onto a first target time symbol of the time unit.

The step <NUM> may include the following step.

At step <NUM>-<NUM>, the control information, the target data, and the demodulation reference signal are mapped onto different time symbols of the current time unit by using time-division multiplexing. The demodulation reference signal is mapped onto at least one first target time symbol of the time unit. The first target time symbol is located between a time symbol onto which the control information is mapped and a time symbol onto which the target data is mapped.

In this step, according to one or more embodiments, the control information, the target data, and the demodulation reference signal may be mapped as illustrated in <FIG> or <FIG>. In the examples of the present invention, the sequence of mapping the control information and mapping the target data is not limited.

In this way, it should be noted that frequency domain resources occupied by the control information overlap with a part of frequency domain resources occupied by the target data, or the frequency domain resources occupied by the control information overlap with all of the frequency domain resources occupied by the target data.

If the frequency domain resources occupied by the control information overlap with the part of the frequency domain resources occupied by the target data, it may be as illustrated in <FIG> or <FIG>. If the frequency domain resources occupied by the control information overlap with all of the frequency domain resources occupied by the target data, it may be as illustrated in <FIG> or <FIG>.

In the second way, the demodulation reference signal is included in a time symbol on which the control information is located, and the control information and the target data are mapped onto different time symbols of the time unit by using time-division multiplexing, and the demodulation reference signal is mapped onto at least one second target time symbol of the time unit.

At step <NUM>-<NUM>, the control information and the target data are mapped onto different time symbols of the time unit by using time-division multiplexing.

In this step, according to one or more embodiments, when the control information and the target data are mapped onto different time symbols, one time symbol onto which the control information is mapped may be adjacent to one time symbol onto which the target data is mapped, for example, as illustrated in <FIG>. The demodulation reference signal is included in the time symbol on which the control information is located.

In the examples of the present invention, the sequence of mapping the control information and mapping the target data is not limited.

In an example, referring to <FIG>, which is a flowchart illustrating another sidelink-based transmission method according to the example illustrated in <FIG>, besides the above-mentioned step <NUM>-<NUM>, the step <NUM> may also include the following step.

At step <NUM>-<NUM>, the demodulation reference signal is mapped onto at least one second target time symbol of the time unit. The second target time symbol is located between any two time symbols onto which the target data is mapped.

In one or more embodiments of the present invention, in the case that there are relatively quick changes in channel's time domain, one second target time symbol may be inserted behind every <NUM>-<NUM> time symbols onto which the target data is mapped, and the demodulation reference signal is mapped onto the second target time symbol, for example, as illustrated in <FIG>.

In the case that there are relatively slow changes in channel's time domain, each second target time symbol may be inserted behind more time symbols onto which the target data is mapped, thereby reducing an overhead of demodulation reference signal.

In one or more embodiments as above, if the demodulation reference signal in the time symbol onto which the control information is mapped is enough to demodulate all of the target data in the time unit, the above step <NUM>-<NUM> may be omitted, that is, it is not necessary to map the demodulation reference signal onto the second target time symbol again, which saves the overhead of demodulation reference signal.

It should also be noted that, in this way, the frequency domain resources occupied by the control information overlap with a part of the frequency domain resources occupied by the target data, or the frequency domain resources occupied by the control information overlap with all of the frequency domain resources occupied by the target data.

If the frequency domain resources occupied by the control information overlap with the part of the frequency domain resources occupied by the target data, it may be as illustrated in <FIG>. If the frequency domain resources occupied by the control information overlap with all of the frequency domain resources occupied by the target data, it may be as illustrated in <FIG>.

In the third way, the demodulation reference signal is not included in a time symbol on which the control information is located and is mapped onto a third target time symbol of the time unit, the control information is mapped onto a fourth target time symbol before the third target time symbol and onto a fifth target time symbol behind the third target time symbol, and the target data is mapped onto at least one sixth target time symbol that is located behind the fifth target time symbol and/or before the fourth target time symbol.

Referring to <FIG>, which is a flowchart illustrating another sidelink-based transmission method according to the example illustrated in <FIG>, the step <NUM> may include the following steps.

At step <NUM>-<NUM>, the demodulation reference signal is mapped onto at least one third target time symbol of the time unit.

In this step, the demodulation reference signal is firstly mapped onto time symbol <NUM> of the time unit, for example, as illustrated in <FIG>.

At step <NUM>-<NUM>, the control information is mapped onto the fourth target time symbol and the fifth target time symbol simultaneously.

In this step, the control information may be mapped onto the fourth target time symbol which is before the third target time symbol and onto the fifth target time symbol which is behind the third target time symbol, for example, onto time symbol <NUM> and time symbol <NUM> illustrated in <FIG>.

At step <NUM>-<NUM>, the target data is mapped onto at least one sixth target time symbol.

In this step, the transmitter may further map the target data onto at least one sixth target time symbol which is located behind the fifth target time symbol, for example, as illustrated in <FIG>, or map the target data onto at least one sixth target time symbol which is located before the fourth target time symbol, for example, as illustrated in <FIG>.

Of course, in one or more embodiments, the transmitter may map the target data onto at least one sixth target time symbol which is located behind the fifth target time symbol and before the fourth target time symbol.

Similarly, in this way, the frequency domain resources occupied by the control information overlap with a part of the frequency domain resources occupied by the target data, or the frequency domain resources occupied by the control information overlap with all of the frequency domain resources occupied by the target data.

Through each of the above three ways, it can succeed in mapping the control information, the target data, and the demodulation reference signal onto the current time unit by using time-division multiplexing, and thus the transmitter may perform the mapping in any one way.

With respect to the above step <NUM>, the transmitter may adopt a same precoding matrix and a same transmitting beam directly according to the related technology to transmit the control information, the target data, and the demodulation reference signal to the receiver through the time unit.

In an example, it is not necessary to use all of resource elements of the time symbol onto which the demodulation reference signal is mapped to carry the demodulation reference signal. In one or more embodiments, refer to <FIG>, which is a flowchart illustrating another sidelink-based transmission method on the basis of the example illustrated in <FIG>, before the step <NUM> is performed, the above method may further include the following step.

At step <NUM>, a part of the target data is mapped, by using frequency-division multiplexing, onto a time symbol on which the demodulation reference signal is located.

In this step, a part of the resource elements in the time symbol onto which the demodulation reference signal is mapped may be allocated to the target data for carrying the part of the target data, for example, as illustrated in <FIG>.

In the above example, the transmitter may use frequency-division multiplexing to map the part of the target data onto the time symbol on which the demodulation reference signal is located, thereby saving transmission resources. Through the above processes, the control information, the target data, and the demodulation reference signal may be transmitted in the sidelink communication by using time-division multiplexing and frequency-division multiplexing simultaneously, which further meets respective requirements of different V2X services.

In an example, the frequency domain resources occupied by the control information overlap with at least a part of the frequency domain resources occupied by the target data. If the frequency domain resources occupied by the control information overlap with the part of the frequency domain resources occupied by the target data, some resource elements in the time symbol onto which the control information is mapped are idle. In an example of the present invention, referring to <FIG>, which is a flowchart illustrating another sidelink-based transmission method on the basis of the example illustrated in <FIG>. before step <NUM> is performed, the above method may further include the following step.

At step <NUM>, a part of the target data is mapped onto a time symbol on which the control information is located.

In this step, the idle resource elements in the time symbol on which the control information is located may be allocated to the target data for carrying the part of the target data, for example, as illustrated in <FIG>. If the demodulation reference signal is included in the time symbol on which the control information is located, the part of the target data may be mapped onto idle resource elements, for example, as illustrated in <FIG>.

In the above example, when the time-division multiplexing is used, the frequency domain resources occupied by the control information overlap with at least the part of the frequency domain resources occupied by the target data. In one or more embodiments, in the case that the frequency domain resources occupied by the control information overlap with the part of the frequency domain resources occupied by the target data, the transmitter may also map a part of the target data onto the time symbol on which the control information is located. Similarly, the control information, the target data, and the demodulation reference signal may be transmitted in the sidelink communication by using time-division multiplexing and frequency-division multiplexing simultaneously, which further meets respective requirements of different V2X services.

Next, the sidelink-based transmission method provided by the examples of the present invention is explained from a side of a receiver.

An example of the present invention provides another sidelink-based transmission method, which is applicable to the receiver in a V2X network. Referring to <FIG>, which is a flowchart illustrating another sidelink-based transmission method according to the example, the following steps may be included.

At step <NUM>, control information, target data, and a demodulation reference signal, which are transmitted by a transmitter through a time unit, are received.

The target data is associated with the control information, the demodulation reference signal is shared by the control information and the target data, and the control information, the target data, and the demodulation reference signal are mapped onto the time unit by using time-division multiplexing.

At step <NUM>, the control information and the target data are demodulated respectively from the time unit based on the demodulation reference signal.

With respect to the above step <NUM>, the receiver may directly receive the control information, the target data, and the demodulation reference signal, which are transmitted by the transmitter through the time unit.

With respect to the above step <NUM>, corresponding to different time-division multiplexing ways used by the transmitter, the receiver may adopt different approaches to demodulate the control information and the target data respectively from the time unit based on the demodulation reference signal.

For the first approach, the demodulation reference signal is not included in a time symbol onto which the control information is mapped, but is mapped onto a first target time symbol of the time unit. In one or more embodiments, referring to <FIG>, which is a flowchart illustrating another sidelink-based transmission method on the basis of the example illustrated in <FIG>, the step <NUM> may include the following steps.

At step <NUM>-<NUM>, the control information located on a time symbol of the time unit, which is before or behind the first target time symbol, is demodulated based on the demodulation reference signal on the first target time symbol.

In one or more embodiments of the present invention, the transmitter maps the control information, the target data, and the demodulation reference signal onto the time unit in the first way, as illustrated in <FIG>.

In this step, the receiver may directly demodulate the control information on time symbol <NUM> and time symbol <NUM> based on the demodulation reference signal on time symbol <NUM> according to the prior art.

Or, the receiver may directly demodulate the control information on time symbol <NUM> and time symbol <NUM> based on the demodulation reference signal on time symbol <NUM> in <FIG>.

At step <NUM>-<NUM>, the target data located on the time symbol of the time unit, which is before or behind the first target time symbol, is demodulated based on the demodulation reference signal on the first target time symbol.

In this step, the receiver may directly demodulate the target data on time symbols <NUM>-<NUM> based on the demodulation reference signal on time symbol <NUM> in <FIG> according to the prior art.

Or, the receiver may directly demodulate the target data on time symbols <NUM>-<NUM> based on the demodulation reference signal on time symbol <NUM> in <FIG>.

For the second approach, the demodulation reference signal is included in a time symbol onto which the control information is mapped, and is further mapped onto at least one second target time symbol of the time unit. In one or more embodiments, referring to <FIG>, which is a flowchart illustrating another sidelink-based transmission method on the basis of the example illustrated in <FIG>, the step <NUM> may include the following steps.

At step <NUM>-<NUM>, the control information is demodulated based on the demodulation reference signal included in the time symbol onto which the control information is mapped.

In this step, the receiver may demodulate the control information based on the demodulation reference signal on which the control information is located according to the prior art. That is, the receiver demodulate the control information on time symbol <NUM> and time symbol <NUM> based on the demodulation reference signal on time symbol <NUM> and time symbol <NUM> in <FIG>.

Or, the receiver may demodulate the control information on time symbol <NUM> and time symbol <NUM> based on the demodulation reference signal on time symbol <NUM> and time symbol <NUM> in <FIG>.

At step <NUM>-<NUM>, the data located on a seventh target time symbol of the time unit is demodulated based on the demodulation reference signal included in the time symbol onto which the control information is mapped. The seventh target time symbol is located between a time symbol onto which the control information is mapped and the first one of the second target time symbol.

In one or more embodiments of the present invention, the transmitter further maps the demodulation reference signal onto at least one second target time symbol of the time unit. Accordingly, in this step, the receiver may demodulate the data on time symbol <NUM> and time symbol <NUM> based on the demodulation reference signals on time symbol <NUM> and time symbol <NUM> in <FIG>.

Or, the receiver may demodulate the data on time symbols <NUM>-<NUM> based on the demodulation reference signal on time symbol <NUM> and time symbol <NUM> in <FIG>.

At step <NUM>-<NUM>, the target data, except the data mapped onto the seventh target time symbol, is demodulated based on the demodulation reference signal mapped on at least one second target time symbol.

In this step, the receiver demodulates the data on time symbols <NUM>-<NUM> based on the demodulation reference signal on time symbol <NUM> in <FIG>.

Or, the receiver demodulates the data on time symbols <NUM>-<NUM> based on the demodulation reference signal on time symbol <NUM> in <FIG>.

In one or more embodiments of the present invention, if the demodulation reference signal is only mapped onto the time symbol on which the control information is located, the above steps <NUM>-<NUM> and <NUM>-<NUM> may be simplified to directly demodulate all of the target data based on the demodulation reference signal according to the related art.

For the third approach, the demodulation reference signal is not included in a time symbol on which the control information is located, and is mapped onto a third target time symbol of the time unit. In one or more embodiments, referring to <FIG>, which is a flowchart illustrating another sidelink-based transmission method on the basis of the example illustrated in <FIG>, the step <NUM> may include the following steps.

At step <NUM>-<NUM>, the control information located on a fourth target time symbol and a fifth target time symbol of the time unit is demodulated based on the demodulation reference signal on the third target time symbol.

In this step, the receiver may demodulate the control information on time symbol <NUM> or time symbol <NUM> based on the demodulation reference signal on time symbol <NUM> in <FIG> according to the prior art.

Or, the receiver may demodulate the control information on time symbol <NUM> and time symbol <NUM> based on the demodulation reference signal on time symbol <NUM> in <FIG>.

At step <NUM>-<NUM>, the target data located on at least one sixth target time symbol of the time unit is demodulated based on the demodulation reference signal on the third target time symbol.

In this step, the receiver may demodulate the target data on time symbols <NUM>-<NUM> based on the demodulation reference signal on time symbol <NUM> in <FIG> according to the prior art.

Or, the receiver may demodulate the target data on time symbols <NUM>-<NUM> based on the demodulation reference signal on time symbol <NUM> in <FIG> according to the prior art.

In one embodiment, if the transmitter also uses frequency-division multiplexing to map a part of the target data onto the time symbol on which the demodulation reference signal is located, the receiver may demodulate the part of the target data mapped onto the time symbol on which the demodulation reference signal is located by utilizing the demodulation reference signal.

In one embodiment, if the transmitter also uses frequency-division multiplexing to map a part of the target data onto the time symbol on which the control information is located, the receiver may accordingly demodulate the part of the target data mapped on the time symbol on which the control information is located by utilizing the demodulation reference signal in the above-mentioned approach.

In the above examples, when both time-division multiplexing and frequency-division multiplexing are used by the transmitter, the receiver can correctly demodulate the control information and the target data from the time unit through the shared demodulation reference signal, thereby further meeting respective requirements of different V2X services.

In one example, referring to <FIG>, which is a flowchart illustrating another sidelink-based transmission method according to the example, the following steps may be included.

At step <NUM>, a transmitter configures a demodulation reference signal shared by control information and target data.

The target data indicates to-be-transmitted data associated with the control information.

At step <NUM>, the transmitter maps the control information, the target data, and the demodulation reference signal onto a current time unit by using time-division multiplexing.

In one or more embodiments, the transmitter may map the control information, the target data, and the demodulation reference signal onto the current time unit in any one of the above-mentioned time-division multiplexing ways.

At step <NUM>, the transmitter maps, by using frequency-division multiplexing, a part of the target data onto a time symbol on which the demodulation reference signal is located.

At step <NUM>, if frequency domain resources occupied by the control information overlap with a part of frequency domain resources occupied by the target data, the transmitter maps, by using frequency-division multiplexing, the part of the target data onto a time symbol on which the control information is located.

At step <NUM>, the transmitter transmits the control information, the target data, and the demodulation reference signal to a receiver through the time unit.

At step <NUM>, the receiver demodulates the control information and the target data respectively from the time unit based on the demodulation reference signal.

In the above example, the transmitter may configure a shared demodulation reference signal for to-be-transmitted control information and to-be-transmitted target data, thereby reducing an overhead on demodulation reference signal and improving a utilization rate of frequency spectrum. In addition, the transmitter may combine time-division multiplexing and frequency-division multiplexing to map the control information, the target data, and the demodulation reference signal onto a current time unit, and transmit the control information, the target data, and the demodulation reference signal to the receiver through the current time unit, which has high availability.

Corresponding to the foregoing method examples implementing the application functions, the present invention also provides apparatuses examples for implementing the application functions, and provides corresponding transmitter examples and corresponding receiver examples.

Referring to <FIG>, which is a block diagram illustrating a sidelink-based transmission apparatus according to an example, the apparatus is applicable to a transmitter and includes:.

In one or more embodiments, the demodulation reference signal is not included in a time symbol on which the control information is located.

Referring to <FIG>, which is a block diagram illustrating another sidelink-based transmission apparatus on the basis of the example illustrated in <FIG>, the first mapping module <NUM> includes:
a first mapping submodule <NUM> that is configured to map the control information, the target data, and the demodulation reference signal onto different time symbols of the current time unit by using time-division multiplexing, where the demodulation reference signal is mapped onto at least one first target time symbol of the time unit, and where the first target time symbol is located between a time symbol onto which the control information is mapped and a time symbol onto which the target data is mapped.

In one or more embodiments, the demodulation reference signal is included in a time symbol on which the control information is located.

Referring to <FIG>, which is a block diagram illustrating another sidelink-based transmission apparatus on the basis of the example illustrated in <FIG>, the first mapping module <NUM> includes:
a second mapping submodule <NUM> that is configured to map the control information and the target data onto different time symbols of the time unit by using time-division multiplexing.

Referring to <FIG>, which is a block diagram illustrating another sidelink-based transmission apparatus on the basis of the example illustrated in <FIG>, the first mapping module <NUM> further includes:
a third mapping submodule <NUM> that is configured to map the demodulation reference signal onto at least one second target time symbol of the time unit, where the second target time symbol is located between any two time symbols onto which the target data is mapped.

Referring to <FIG>, which is a block diagram illustrating another sidelink-based transmission apparatus on the basis of the example illustrated in <FIG>, the first mapping module <NUM> includes:.

Referring to <FIG>, which is a block diagram illustrating another sidelink-based transmission apparatus on the basis of the example illustrated in <FIG>, the apparatus further includes:
a second mapping module <NUM> that is configured to map, by using frequency-division multiplexing, a part of the target data onto a time symbol on which the demodulation reference signal is located.

In one or more embodiments, frequency domain resources occupied by the control information overlap with a part of frequency domain resources occupied by the target data; or
the frequency domain resources occupied by the control information overlap with all of the frequency domain resources occupied by the target data.

Referring to <FIG>, which is a block diagram illustrating another sidelink-based transmission apparatus on the basis of the example illustrated in <FIG>, the apparatus further includes:
a third mapping module <NUM> that is configured to map, by using frequency-division multiplexing, a part of the target data onto the time symbol on which the control information is located if the frequency domain resources occupied by the control information overlap with a part of the frequency domain resources occupied by the target data.

Referring to <FIG>, which is a block diagram illustrating another sidelink-based transmission apparatus on the basis of the example illustrated in <FIG>, the transmitting module <NUM> includes:
a transmitting submodule <NUM> that is configured to transmit, by adopting a same precoding matrix and a same transmitting beam, the control information, the target data, and the demodulation reference signal to the receiver through the time unit.

Referring to <FIG>, which is a block diagram illustrating a sidelink-based transmission apparatus according to an example, the apparatus is applicable to a receiver and includes:.

For the apparatus examples, since they basically correspond to the method examples, reference may be made to the partial description of the method examples. The apparatus examples described above are merely illustrative, in which the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, i.e., may be located in one place or may be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the objectives of the present invention. Those of ordinary skill in the art can understand and implement without creative work.

Correspondingly, the present invention also provides a computer-readable storage medium storing a computer program. The computer program is configured to execute any one of the sidelink-based transmission methods applicable to a transmitter described above.

Correspondingly, the present invention also provides a computer-readable storage medium storing a computer program. The computer program is configured to execute any one of the sidelink-based transmission methods applicable to a receiver described above.

As illustrated in <FIG>, which is a schematic structural diagram illustrating a sidelink-based transmission apparatus <NUM> according to an example, the apparatus <NUM> may be provided as a transmitter device. Referring to <FIG>, the apparatus <NUM> includes a processing component <NUM>, a wireless transmission/reception component <NUM>, an antenna component <NUM>, and a signal processing part peculiar to a wireless interface. The processing component <NUM> may further include one or more processors.

One of the processors in the processing component <NUM> may be configured to execute any one of the foregoing sidelink-based transmission methods applicable to the transmitter.

As illustrated in <FIG>, which is a schematic structural diagram illustrating a sidelink-based transmission apparatus <NUM> according to an example, the apparatus <NUM> may be provided as a receiver device. Referring to <FIG>, the apparatus <NUM> includes a processing component <NUM>, a wireless transmission/reception component <NUM>, an antenna component <NUM>, and a signal processing part peculiar to a wireless interface. The processing component <NUM> may further include one or more processors.

One of the processors in the processing component <NUM> may be configured to execute any one of the foregoing sidelink-based transmission methods applicable to the receiver.

Other implementations of the present invention will be apparent to those skilled in the art from consideration of the specification and practice of the present invention herein. The present invention is intended to cover any variations, uses, modification or adaptations of the present invention that follow the general principles thereof and include common knowledge or conventional technical means in the related art that are not disclosed in the present invention. The description and the examples are only illustrative, and the true scope of the present invention are set forth in the appended claims.

Claim 1:
A sidelink-based transmission method, comprising:
configuring (<NUM>), by a transmitter, a demodulation reference signal shared by control information and target data, wherein the target data indicates to-be-transmitted data associated with the control information;
characterized by the method further comprising:
mapping (<NUM>), by the transmitter, the control information, the target data, and the demodulation reference signal onto a time unit by using time-division multiplexing; and
transmitting (<NUM>), by the transmitter, the control information, the target data, and the demodulation reference signal to a receiver through the time unit.