Communication method and apparatus

Abstract

This application discloses a communication method, apparatus, and storage medium. A network device sends first indication information to a terminal device. This first indication information includes a first time-domain location used to transmit a first signal. The first signal is transmitted using a frequency-domain equally spaced mapping method. The first time-domain location is adjacent to a second time-domain location, which is used to transmit a second signal. The second signal corresponds to a different number of antenna ports than the first signal. The network device then transmits the first signal to the terminal device at the first time-domain location according to the first indication information. Using the scheme of this application, transmitting the first signal using frequency-domain equally spaced mapping at the first time-domain location adjacent to the second time-domain location allows the use of the signal on the latter half of the symbols at the first time-domain location that are not affected by time delay for data demodulation. This reduces the signal performance loss caused by the time delay during the conversion of the RF channel for receiving echo signals to the RF channel for transmitting communication signals.

Description

Technical Field

[0001] This application relates to the field of radar and communication integration technology, and in particular to a communication method and device. Background Technology

[0002] The station-side radar operates in a self-transmitting and self-receiving mode for the first signal. The base station can detect the properties of the target object by receiving the echo signal of the first signal, and the detection results can be used to calculate information such as the distance, speed, and position of the detected target.

[0003] There are no dedicated sensing signals in existing long-term evolution (LTE) and new radio (NR) systems. Existing radar-communication integrated designs can utilize existing LTE or NR signals for radar sensing and detection.

[0004] While sharing hardware between radar sensing devices and communication base stations is a mainstream trend and helps save on hardware costs, the process of converting the radio frequency channel used to receive the echo signal into the radio frequency channel used to transmit the communication signal causes signal delay. Therefore, this affects the demodulation of the communication signal at adjacent time-domain locations of the received echo signal, resulting in a decrease in communication performance across the entire bandwidth.

[0005] One solution is to mutate the adjacent time domain positions, preventing the terminal device from receiving communication signals at those adjacent time domain positions. However, this results in an overhead of 2 / 14 within any time slot (assuming the number of orthogonal frequency division multiplexing (OFDM) symbols in a time slot is 14, and the first signal / echo signal occupies 2 symbols, then there are 2 adjacent symbols).

[0006] Another solution is to leave adjacent time-domain locations unprocessed and handle the communication signals using a link-adaptive modulation and coding scheme (MCS). However, this approach results in at least a 40% loss in communication performance, with the loss increasing proportionally to the impact of signal delay.

[0007] Therefore, how to reduce the loss of signal performance caused by the time delay during the conversion of the radio frequency channel for receiving echo signals into the radio frequency channel for transmitting communication signals is a problem that this application urgently needs to solve. Summary of the Invention

[0008] This application provides a communication method and apparatus to reduce the loss of signal performance caused by the time delay during the process of converting the radio frequency channel for receiving echo signals into the radio frequency channel for transmitting communication signals.

[0009] In a first aspect, a communication method is provided, the method comprising: receiving first indication information, the first indication information including a first time-domain position, the first time-domain position being used to transmit a first signal, the first signal being transmitted using a frequency-domain equally spaced mapping method, the first time-domain position being adjacent to a second time-domain position, the second time-domain position being used to transmit a second signal, the second signal having a different number of antenna ports than the first signal; and receiving the first signal at the first time-domain position according to the first indication information. In this aspect, transmitting the first signal using frequency-domain equally spaced mapping at the first time-domain position adjacent to the second time-domain position, and using the second time-domain position to transmit the second signal, allows the signal on the latter half of the symbols at the first time-domain position, which is not affected by time delay, to be used for demodulation data, reducing the signal performance loss caused by the time delay during the conversion of the radio frequency channel for receiving echo signals to the radio frequency channel for transmitting communication signals.

[0010] In one possible implementation, the first signal is a demodulation reference signal of a first type, and the first time-domain position includes candidate positions for additional demodulation reference signals. For Physical Downlink Shared Signal Mapping Type A, the candidate positions for the additional demodulation reference signals include at least one of the following symbol indices: 4, 5, 6, 10, 11, 12, 13; and / or for Physical Downlink Shared Signal Mapping Type B, the candidate positions for the additional demodulation reference signals include at least one of the following symbol indices: 2, 3, 4, 5, 9, 10, 11, 12. In this implementation, the first type of demodulation reference signal is transmitted at equal intervals in the frequency domain, i.e., the first type of demodulation reference signal is transmitted on one resource unit, and no data is transmitted on another resource unit. To enable the first type of demodulation reference signal to be flexibly configured at the first time-domain position according to the second time-domain position of the second signal, the optional symbol indices of the demodulation reference signal include the aforementioned candidate positions for the additional demodulation reference signals.

[0011] In another possible implementation, the first time-domain position includes at least one additional demodulation reference signal, wherein one of the additional demodulation reference signals is spaced X symbols apart from the preceding reference signal, where X is the number of symbols between the two time-slot positions of the second signal in one time slot; or the first time-domain position includes at least two additional demodulation reference signals, wherein the interval between the two additional demodulation reference signals is Y symbols, where Y is the number of symbols between the two time-domain positions of the second signal in one time slot.

[0012] In another possible implementation, the first signal is a signal in the physical downlink shared channel, and the first time-domain position includes at least one of the following symbol indices: 2, 9, 4, 11, 5, 12, 6, 13. In this implementation, the physical downlink shared channel can also be transmitted using a frequency-domain mapping with equal intervals of N. That is, the physical downlink shared channel signal is transmitted on REs with intervals of N, and no data is transmitted on REs with intervals of N, where N is greater than or equal to 1.

[0013] In another possible implementation, the method further includes: receiving second indication information, the second indication information indicating at least one of the following: the number of antenna ports corresponding to the second time-domain location is different from the number of antenna ports corresponding to the first time-domain location; the number of antenna ports corresponding to the second time-domain location; and the number of antenna ports corresponding to the first time-domain location. In this implementation, after the terminal device receives the first signal at the first time-domain location, it can know from the second indication information that the number of radio frequency channels used by the network device to transmit the second signal at the second time-domain location is different from the number of radio frequency channels used to transmit the first signal at the first time-domain location, or that the radio frequency channel used to receive the second signal at the second time-domain location has been converted to the radio frequency channel used to transmit the first signal at the first time-domain location, thus affecting the first signal.

[0014] In another possible implementation, the method further includes: removing the cyclic prefix of the signal of at least one orthogonal frequency division multiplexing (OFDM) symbol of the first signal at the first time domain position; and using the signal of half of the at least one OFDM symbol for demodulation data, or using the signal of half of the at least one OFDM symbol as the signal of the other half of the OFDM symbol, and using the processed at least one OFDM symbol for demodulation data.

[0015] In a second aspect, a communication method is provided, the method comprising: sending first indication information, the first indication information including a first time domain position, the first time domain position being used to transmit a first signal, the first signal being transmitted using a frequency domain equal-interval mapping method, the first time domain position being adjacent to a second time domain position, the second time domain position being used to transmit a second signal, the second signal having a different number of antenna ports than the first signal; and sending the first signal at the first time domain position according to the first indication information.

[0016] In one possible implementation, the first signal is a demodulation reference signal of a first type, and the first time-domain position includes candidate positions of additional demodulation reference signals; for physical downlink shared signal mapping type A, the candidate positions of the additional demodulation reference signals include at least one of the following symbol indices: 4, 5, 6, 10, 11, 12, 13; and / or for physical downlink shared signal mapping type B, the candidate positions of the additional demodulation reference signals include at least one of the following symbol indices: 2, 3, 4, 5, 9, 10, 11, 12.

[0017] In another possible implementation, the first time-domain position includes at least one additional demodulation reference signal, wherein one of the additional demodulation reference signals is spaced X symbols apart from the preceding reference signal, where X is the number of symbols between the two time-slot positions of the second signal in one time slot; or the first time-domain position includes at least two additional demodulation reference signals, wherein the interval between the two additional demodulation reference signals is Y symbols, where Y is the number of symbols between the two time-domain positions of the second signal in one time slot.

[0018] In another possible implementation, the first signal is a signal in a physical downlink shared channel, and the first time-domain position includes at least one of the following symbol indices: 2, 9, 4, 11, 5, 12, 6, 13.

[0019] In another possible implementation, the method further includes: power boosting the resource unit that transmits the first signal at the first time-domain location.

[0020] In another possible implementation, the method further includes: sending second indication information, the second indication information being used to indicate at least one of the following: the number of antenna ports corresponding to the second time domain location is different from the number of antenna ports corresponding to the first time domain location, the number of antenna ports corresponding to the second time domain location, and the number of antenna ports corresponding to the first time domain location.

[0021] Thirdly, a communication device is provided that can implement the communication method described in the first aspect. For example, the communication device may be a chip or a terminal device. The above method can be implemented through software, hardware, or hardware executing corresponding software.

[0022] In one possible implementation, the communication device may include a unit that implements the first aspect or any of the implementations of the first aspect.

[0023] Fourthly, a communication device is provided that can implement the communication method described in the second aspect above. For example, the communication device may be a chip or a base station, and the above method can be implemented through software, hardware, or hardware executing corresponding software.

[0024] In one possible implementation, the communication device may include a unit that implements the first aspect or any of the implementations of the first aspect.

[0025] In one possible implementation, the communication device in the third to fourth aspects described above includes a processor coupled to a memory; the processor is configured to support the device in performing the corresponding functions in the method of repeated PDCCH transmission described above. The memory is used to couple with the processor and stores the necessary programs (instructions) and / or data of the device. Optionally, the communication device may further include a communication interface for supporting communication between the device and other network elements. Optionally, the memory may be located inside or outside the communication device.

[0026] In another possible implementation, the communication device in the third and fourth aspects described above includes a processor and a transceiver device. The processor is coupled to the transceiver device and is used to execute computer programs or instructions to control the transceiver device to receive and send information. When the processor executes the computer programs or instructions, it is also used to implement the above method through logic circuits or executing code instructions. The transceiver device can be a transceiver, a transceiver circuit, or an input / output interface, used to receive signals from other communication devices besides the communication device and transmit them to the processor, or to send signals from the processor to other communication devices besides the communication device. When the communication device is a chip, the transceiver device is a transceiver circuit or an input / output interface.

[0027] When the communication device in the third to fourth aspects above is a chip, the transmitting unit can be an output unit, such as an output circuit or a communication interface; the receiving unit can be an input unit, such as an input circuit or a communication interface. When the communication device is a terminal device, the transmitting unit can be a transmitter or a receiver; the receiving unit can be a receiver or a receiver.

[0028] Fifthly, a computer-readable storage medium is provided, wherein a computer program or instructions are stored therein, which, when executed, implement the methods described in the above aspects.

[0029] In a sixth aspect, a computer program product containing instructions is provided, which, when executed on a communication device, causes the communication device to perform the methods described in the above aspects.

[0030] In a seventh aspect, a communication system is provided, which includes the communication device of the third aspect and the communication device of the fourth aspect. Attached Figure Description

[0031] Figure 1 A schematic diagram illustrating the conversion of a radio frequency channel used for receiving echo signals into a radio frequency channel used for transmitting communication signals;

[0032] Figure 2 This is a schematic diagram for measuring signal delay;

[0033] Figure 3 A schematic diagram showing that adjacent time-domain positions for transmitting the first signal and receiving the echo signal are punched.

[0034] Figure 4 This is a schematic diagram illustrating throughput loss under a link adaptive adjustment scheme.

[0035] Figure 5 A schematic diagram of the architecture of an integrated communication and radar system provided in this application embodiment;

[0036] Figure 6 A flowchart illustrating a communication method provided in an embodiment of this application;

[0037] Figure 7 A schematic diagram illustrating the relative positional relationship between the DMRS and the second signal provided in an embodiment of this application;

[0038] Figure 8 A schematic diagram of simulation results for channel estimation using the last 1 / 2 OFDM symbols provided in an embodiment of this application;

[0039] Figure 9 A schematic diagram illustrating the relative positional relationship between the PDSCH and the second signal, provided for an embodiment of this application;

[0040] Figure 10 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0041] Figure 11 This is a schematic diagram of another communication device provided in an embodiment of this application. Detailed Implementation

[0042] The embodiments of this application are described below with reference to the accompanying drawings.

[0043] like Figure 1As shown, the nth time slot includes 14 symbols. The radar-communication integrated device transmits the first signal and receives the echo signal on the 7th and 14th symbols. For example, this radar-communication integrated device includes 8 radio frequency (RF) channels. During radar detection, 4 RF channels are used to transmit the first signal (referred to as "4T"), and 4 RF channels are used to receive the echo signal (referred to as "4R"). When the 4 RF channels used to receive the echo signal are converted into 4 RF channels used to transmit the communication signal, there will be a signal delay of 2 to 4 μs.

[0044] The time delay in transmitting communication signals at adjacent time-domain locations caused by converting four RF channels used for receiving echo signals into four RF channels used for transmitting communication signals is equivalent to no communication data being transmitted at those adjacent time-domain locations, on a sampling point basis. For example... Figure 2 As shown in Table 1, assuming there are n sampling points, the relationship between signal delay and the number of sampling points can be represented as follows:

[0045] Table 1

[0046] Delay (μs) Number of sampling points 0.5 246 1 492 1.5 738 2 983 2.5 1229 3 1475 3.5 1721 4 1967

[0047] One solution is to punch a hole in that adjacent time domain location, preventing the terminal device from receiving communication signals at that location. For example... Figure 3 As shown, this results in an overhead of 2 / 14 in any time slot.

[0048] Another solution is to leave adjacent time-domain locations unprocessed and adjust the MCS (Multi-Signal System) to handle communication signals adaptively via the link. However, as... Figure 4 The diagram illustrates the throughput loss under the link adaptive adjustment scheme, which results in at least a 40% loss in communication performance, and the loss increases proportionally with the impact of signal delay.

[0049] This application provides a communication method and apparatus, in which a first signal with frequency-domain equal-interval mapping is transmitted at a first time domain position adjacent to a second time domain position, and the second time domain position is used to transmit a second signal. The signal on the last half of the symbols at the first time domain position that is not affected by time delay can be used for data demodulation, thereby reducing the loss of signal performance caused by the time delay in the process of converting the radio frequency channel for receiving echo signals into the radio frequency channel for transmitting communication signals.

[0050] This application is primarily applied to 4G and 5G mobile communication systems, but can also be applied to other communication systems. In this communication system, one entity needs to send downlink data and pilot information, and can also receive echo signals from a sensed target to estimate the target's speed, distance, trajectory, shape, size, etc.; another entity needs to receive this instruction information and can transmit data via uplink feedback information.

[0051] like Figure 5 The diagram shown is an architectural schematic of an integrated communication and radar system provided in an embodiment of this application. The communication system includes a wireless access network device, a terminal device, and a sensed target. The sensed target can be the terminal device, or it can be a vehicle, pedestrian, bricks on the road, etc. In this integrated communication and radar system, the wireless access network device can send downlink data to the terminal device, and the terminal device can also send uplink data to the wireless access network device. Simultaneously, the wireless access network device can send sensing signals and receive echo signals from the sensed target for estimating the target's speed, distance, trajectory, shape, size, etc.

[0052] The wireless access network equipment can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next-generation NodeB (gNB) in a 5G mobile communication system, a next-generation base station in a 6G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system; it can also be a module or unit that performs some of the functions of a base station, for example, a central unit (CU) or a distributed unit (DU). The wireless access network equipment can be a macro base station, a micro base station, an indoor station, a relay node, or a donor node. The embodiments of this application do not limit the specific technology or equipment form used in the wireless access network equipment. For ease of description, a base station is used as an example of wireless access network equipment in the following description.

[0053] Terminal devices can also be called user equipment (UE), mobile stations, mobile terminals, etc. Terminal devices can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, etc. Terminal devices can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, etc. The embodiments of this application do not limit the specific technologies or device forms used in the terminal devices.

[0054] Base stations and terminal equipment can be fixed or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; on water; or in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of the base stations and terminal equipment.

[0055] Communication between base stations and terminal devices, between base stations, and between terminal devices can be conducted using licensed spectrum, unlicensed spectrum, or both simultaneously. Communication can be conducted using spectrum below 6 GHz, spectrum above 6 GHz, or both simultaneously. The embodiments of this application do not limit the spectrum resources used for wireless communication.

[0056] In the embodiments of this application, the functions of the base station can be executed by modules (such as chips) within the base station, or by a control subsystem that includes base station functions. This control subsystem, including base station functions, can be a control center in the aforementioned application scenarios such as smart grids, industrial control, intelligent transportation, and smart cities. Similarly, the functions of the terminal device can be executed by modules (such as chips or modems) within the terminal device, or by a device that includes terminal device functions.

[0057] Based on the aforementioned integrated communication and radar system, such as Figure 6 As shown in the figure, this application provides a communication method, which may include the following steps:

[0058] S101. The base station sends a first indication message. Accordingly, the terminal device receives the first indication message.

[0059] like Figure 1 As shown, this integrated communication and radar system transmits radar or sensing signals using a portion of the radio frequency (RF) channel at the second time-domain location. This RF channel can also be referred to as the RF chain. The RF channel includes devices such as data converters, frequency converters, filters, and power amplifiers to perform signal processing processes such as digital-to-analog signal conversion, frequency conversion, and signal amplification. Different RF channels can have independent components listed above. Note that the hardware included in the RF channel is not limited to the components listed above.

[0060] The second time-domain location is a predefined symbol or time slot. The radar signal or sensing signal is an electromagnetic wave signal used to detect the sensed target; it can be a pulse signal or a signal from a wireless communication system (e.g., an integrated communication and radar system). In this embodiment, the radar signal is a signal from a wireless communication system. The system also receives echo signals using a portion of the radio frequency channel at this second time-domain location. The echo signal is the signal formed after the radar signal reaches the sensed target and is reflected from the surface of the sensed target because the target cannot completely absorb the electromagnetic waves. Therefore, the second time-domain location is used to transmit a second signal, which can be the aforementioned echo signal. The second signal is used to detect the properties of the target object. Optionally, the second time-domain location may not be used for data transmission, for example, as a resource indicated for rate matching.

[0061] In addition, such as Figure 1 As shown, the number of radio frequency (RF) channels for transmitting or receiving signals at the base station changes at the second time domain position. For example, before the second time domain position, all eight RF channels are used to transmit downlink communication signals; at the second time domain position, four RF channels are used to transmit sensing signals, and the other four RF channels are used to receive echo signals; after the second time domain position, all eight RF channels are used to transmit downlink communication signals.

[0062] Optionally, the second signal mentioned above can also carry communication data.

[0063] The base station in this system also transmits communication signals at other time-domain locations. Specifically, for a first time-domain location adjacent to the second time-domain location, the delay generated during the conversion of the radio frequency channel receiving the echo signal into the radio frequency channel transmitting the communication signal results in a loss of signal performance. In this embodiment, for the transmission of the communication signal at the first time-domain location, the base station sends first indication information, which includes the first time-domain location used to transmit the first signal. The first signal is transmitted using a frequency-domain equally spaced mapping method. The second signal has a different number of receiving or transmitting antenna ports than the first signal. An antenna port refers to the channel on which a symbol transmitted on one antenna port can be derived from the channel on which another symbol is transmitted on the same antenna port. For example, DMRS is associated with PDSCH; a PDSCH signal on one antenna port can be derived from a DMRS signal on that antenna port, only if the two signals are in the same resource (as part of the scheduled PDSCH) and in the same time slot. In this application, the difference in the number of receiving or transmitting antenna ports between the second signal and the first signal can be due to a difference in the number of receiving or transmitting radio frequency channels corresponding to the second signal and the first signal. For example, the maximum number of transmit antenna ports corresponding to the second signal may be different from that of the first signal. Note that the maximum number of antenna ports here refers to the maximum number of transmit or receive radio frequency channels; that is, the maximum number of transmit or receive radio frequency channels corresponding to the second signal is different from that of the first signal. For example, in the example above, four radio frequency channels are used to transmit the second signal, and eight radio frequency channels are used to transmit the first signal.

[0064] S102. The base station transmits a first signal at a first time domain location according to the first indication information. Correspondingly, the terminal device receives the first signal at the first time domain location according to the first indication information.

[0065] The base station transmits a first signal at a first time-domain location using a frequency-domain equally spaced mapping method, based on the first indication information. The terminal device receives the first signal.

[0066] The base station also transmits radar signals at the second time domain location. After the radar signal reaches the sensed target, since the sensed target cannot completely absorb electromagnetic waves, the second signal (echo signal) is reflected by the surface of the sensed target.

[0067] The first signal, transmitted using a frequency domain equal-interval mapping method, is described in detail below:

[0068] In one implementation, the first signal can be a type 1 demodulation reference signal (type 1 DMRS). Specifically, DMRS includes type 1 DMRS and type 2 DMRS. The frequency domain mapping rule for type 1 DMRS is that it is transmitted at equal intervals in the frequency domain, that is, type 1 DMRS is transmitted on one resource element (RE), and no data is transmitted on one RE.

[0069] Specifically, such as Figure 7 The diagram illustrates the relative positional relationship between the DMRS and the second signal. The base station occupies two symbols within one time slot in the second time domain position to transmit the second signal at equal intervals, and the second signal can be flexibly configured according to communication requirements. In this embodiment, type 1 DMRS is transmitted at the first time domain position adjacent to the second time domain position. Specifically, in Figure 7 In the first pattern shown, the second signal is transmitted on the third symbol (symbol index starts from 0, the symbol index corresponding to the third symbol is 2) and the tenth symbol (symbol index is 9). Therefore, the first indication information includes symbol indices 3 and 10, which are used to indicate the first time-domain positions as the fourth symbol (symbol index 3) and the eleventh symbol (symbol index 10). Figure 7 In the second diagram shown, the second signal is transmitted on symbols with symbol indices 3 and 10. Therefore, the first indication information includes symbol indices 4 and 11, and the symbols corresponding to symbol indices 4 and 11 serve as the first time-domain position. Figure 7 In the third diagram shown, the second signal is transmitted on symbols with indexes 4 and 11. Therefore, the first indication information includes indexes 5 and 12, and the symbols corresponding to indices 5 and 12 serve as the first time-domain position. Figure 7 In the fourth pattern shown, the second signal is transmitted on the symbols with symbol indices 5 and 12. The first indication information includes symbol indices 6 and 13, and the symbols corresponding to symbol indices 6 and 13 are used as the first time domain positions.

[0070] exist Figure 7In this architecture, except for mapping the first signal at the first time domain position and the second signal at the second time domain position, the remaining time domain positions are used to transmit the physical downlink control channel (PDCCH) and the physical downlink shared channel (PDSCH). There are two types of PDSCH time domain resource mapping: PDSCH mapping type A and PDSCH mapping type B. In both PDSCH time domain resource mapping types, a front-loaded demodulation reference signal (FL DMRS) is specified (i.e.... Figure 7 The first DMRS mapped at the first time domain position in the middle) and the additional demodulation reference signal (i.e. Figure 7 The optional location of the DMRS mapped on the second first time domain location.

[0071] In the current PDSCH mapping type A, the optional symbol index l0 of FL DMRS is 2 or 3 (index 0 is the first symbol index in a time slot);

[0072] In the current PDSCH mapping type B, the optional symbol index l0 of FL DMRS is 0 (for PDSCH mapping type B, index 0 is the starting time domain position of the PDSCH signal).

[0073] In the current PDSCH mapping types A and B, the optional symbol indices for additional DMRS are shown in Table 2 below:

[0074] In Table 2, l d The meaning is as follows:

[0075] For PDSCH mapping type A, l d This is the duration from the first orthogonal frequency division multiplexing (OFDM) symbol in a time slot to the last OFDM symbol used to schedule PDSCH resources in the time slot. Figure 7 The four patterns of l d = 14 symbols.

[0076] For PDSCH mapping type B, l dThe duration for scheduling PDSCH resources, i.e. Figure 7 The four patterns of l d = 13 symbols.

[0077] In this embodiment, to enable the type 1 DMRS to be flexibly configured at the first time domain position according to the second time domain position of the transmitted second signal, the optional symbol index of the DMRS needs to be supplemented and added. The following implementation methods are available for the four different positions of the second signal:

[0078] Table 2

[0079]

[0080] Implementation method 1, such as Figure 7 As shown in the first figure, when the second signal is transmitted on symbols with index numbers 2 and 9 in each time slot, type 1 DMRS is transmitted on symbols with index numbers 3 and 10.

[0081] For PDSCH mapping type A, since the optional symbol indices of the current FL DMRS include indices 2 and 3, meaning the FL DMRS can be selected from indices 2 and 3, the current configuration of the optional symbol indices of the FL DMRS meets the requirements of this embodiment. According to Table 2, the optional symbol index of the additional DMRS does not support index 10; therefore, it is necessary to supplement the optional symbol index 10 of the additional DMRS. Thus, the first time-domain position can include an additional DMRS, the interval between the additional DMRS and the FL DMRS is 7 symbols, where 7 is the number of symbols between the two time-slot positions of the second signal in one time slot (i.e., 9-2=7).

[0082] For PDSCH mapping type B, index number 0 is the starting time-domain position of the PDSCH signal. Currently, the optional symbol index of FL DMRS includes index number 0, which is the first symbol in a time slot. The optional symbol index of the additional DMRS needs to support index numbers 2 and 9. According to Table 2, the optional symbol index of the additional DMRS supports index number 9, so it does not need to be supplemented; the optional symbol index of the additional DMRS does not support index number 2, therefore, optional symbol index number 2 of the additional DMRS needs to be supplemented. Thus, this first time-domain position includes two additional DMRS, and the interval between the two additional DMRS is 7 symbols, where 7 is the number of symbols between the two time slot positions of the second signal in a time slot (i.e., 9-2=7).

[0083] Implementation method 2, such as Figure 7 As shown in the second figure, when the second signal is transmitted on symbols with index numbers 3 and 10 in each time slot, type 1 DMRS is transmitted on symbols with index numbers 4 and 11.

[0084] For PDSCH mapping type A, since the optional symbol indices for the current FL DMRS include indices 2 and 3, meaning the FL DMRS can be selected from indices 2 and 3. According to Table 2, the optional symbol index for the additional DMRS supports index 11, so no supplementation is needed; however, the optional symbol index for the additional DMRS does not support index 4, therefore, optional symbol index 4 for the additional DMRS needs to be supplemented. Thus, this first time-domain position includes two additional DMRSs, with an interval of 7 symbols between them. 7 represents the number of symbols between the two time-slot positions of the second signal within one time slot (i.e., 10-3 = 7).

[0085] For PDSCH mapping type B, index number 0 is the starting time-domain position of the PDSCH signal. Currently, the optional symbol index of FL DMRS includes index number 0, which is the first symbol in a time slot. The optional symbol index of the additional DMRS needs to support index numbers 3 and 10. According to Table 2, the optional symbol index of the additional DMRS supports index number 3, so no supplementation is needed; the optional symbol index of the additional DMRS does not support index number 10, therefore, optional symbol index number 10 of the additional DMRS needs to be supplemented. Thus, this first time-domain position includes two additional DMRS, with an interval of 7 symbols between the two additional DMRS, where 7 is the number of symbols between the two time slot positions of the second signal in a time slot (i.e., 9-2=7).

[0086] Implementation method 3, such as Figure 7 As shown in the third figure, when the second signal is transmitted on symbols with index numbers 4 and 11 in each time slot, type 1 DMRS is transmitted on symbols with index numbers 5 and 12.

[0087] For PDSCH mapping type A, since the optional symbol indices of the current FL DMRS include indices 2 and 3, meaning the FL DMRS can be selected from indices 2 and 3. According to Table 2, the optional symbol index of the additional DMRS supports index 5, so it does not need to be supplemented; the optional symbol index of the additional DMRS does not support index 12, therefore, optional symbol index 12 of the additional DMRS needs to be supplemented. Thus, this first time-domain position includes two additional DMRSs, with an interval of 7 symbols between the two additional DMRSs, where 7 is the number of symbols between the two time-slot positions of the second signal in one time slot (i.e., 11-4=7).

[0088] For PDSCH mapping type B, index number 0 is the starting time-domain position of the PDSCH signal. Currently, the optional symbol index of FL DMRS includes index number 0, which is the first symbol in a time slot. The optional symbol index of the additional DMRS needs to support index numbers 4 and 11. According to Table 2, the optional symbol index of the additional DMRS does not support index numbers 4 and 11. Therefore, optional symbol index numbers 4 and 11 of the additional DMRS need to be added. Thus, this first time-domain position includes two additional DMRS, and the interval between the two additional DMRS is 7 symbols, where 7 is the number of symbols between the two time slot positions of the second signal in a time slot (i.e., 11-4=7).

[0089] Implementation method 4, such as Figure 7 As shown in Figure 4, when the second signal is transmitted on symbols with index numbers 5 and 12 in each time slot, type 1 DMRS is transmitted on symbols with index numbers 6 and 13.

[0090] For PDSCH mapping type A, the currently available symbol indices for FL DMRS include indices 2 and 3, meaning FL DMRS can be selected from indices 2 and 3. According to Table 2, the available symbol indices for additional DMRS do not support indices 6 and 13; therefore, it is necessary to supplement the available symbol indices 6 and 13 for additional DMRS. Thus, this first time-domain position includes two additional DMRSs, with an interval of 7 symbols between them. 7 represents the number of symbols between the two time-slot positions of the second signal within a time slot (i.e., 12 - 5 = 7).

[0091] For PDSCH mapping type B, index number 0 is the starting time-domain position of the PDSCH signal. Currently, the optional symbol index of FL DMRS includes index number 0, which is the first symbol in a time slot. The optional symbol index of the additional DMRS needs to support index numbers 5 and 12. According to Table 2, the optional symbol index of the additional DMRS supports index number 5, so no supplementation is needed; the optional symbol index of the additional DMRS does not support index number 12, therefore, optional symbol index number 12 of the additional DMRS needs to be supplemented. Thus, this first time-domain position includes two additional DMRS, and the interval between the two additional DMRS is 7 symbols, where 7 is the number of symbols between the two time slot positions of the second signal in a time slot (i.e., 12-5=7).

[0092] Combining the above four implementation methods, for Figure 7 For the four patterns of transmitting the second signal, and for the optional symbol indices of FL DMRS and additional DMRS provided by PDSCH mapping type A and PDSCH mapping type B, the candidate positions for the first time domain position of transmitting type 1 DMRS need to be added as shown in Table 3 below:

[0093] Table 3

[0094]

[0095] The bolded symbol index is a DMRS candidate position that is not supported in Table 2 and is newly added in this embodiment.

[0096] Optionally, Table 3 shows the time-frequency domain pattern design of the signal when the second signal and the communication signal are transmitted together in the same hardware. Figure 7 When considering the four patterns in the table, candidate positions for DMRS can be selected from this table.

[0097] The first indication information may be downlink control information (DCI), media access control-control element (MAC-CE), or radio resource control (RRC) messages, etc. This first indication information includes a first time-domain location, i.e., the symbol index of type 1 DMRS.

[0098] The following example illustrates how to carry the symbol index of type 1 DMRS in a DCI:

[0099] As shown above, the optional symbol indices of FL DMRS in PDSCH mapping type A may be index numbers 2 and 3, and the index numbers of additional DMRS may be: 10; 4 and 11; 5 and 12; 6 and 13. Therefore, 3 bits need to be added to the DCI to indicate the symbol index information of type 1 DMRS. The specific correspondence between the bit values ​​of the 3 bits added to the DCI and the symbol indices of the added type 1 DMRS is shown in Table 4 below:

[0100] Table 4

[0101]

[0102] According to Table 4, for example, in Figure 7 In Figure 1, corresponding to PDSCH mapping type A, the base station selects the symbol index corresponding to the first time domain position from the optional symbol index of the additional DMRS based on the second time domain position of the second signal transmission, and transmits a DCI carrying a bit field "001" to indicate that the index number for transmitting type 1 DMRS is 3 or 10. The base station transmits the first signal by sampling the frequency domain at equal intervals on the symbols with index numbers 3 and 10. The terminal device receives this DCI and receives the first signal on the symbols with index numbers 3 and 10. For example, in... Figure 7In Figure 2, corresponding to PDSCH mapping type A, the base station selects the symbol index corresponding to the first time domain position from the optional symbol index of the additional DMRS based on the second time domain position of the second signal transmission, and transmits a DCI carrying a bit field "010" to indicate that the index number of the type 1 DMRS transmission is 2, 4, or 11. The base station transmits the first signal by sampling the frequency domain at equal intervals on the symbols with index numbers 2, 4, and 11. The terminal device receives this DCI and receives the first signal on the symbols with index numbers 2, 4, and 11.

[0103] In PDSCH mapping type B, the optional symbol index for FL DMRS is index number 0; the index numbers for additional DMRS may be 2 and 9; 3 and 10; 4 and 11; 5 and 12. Therefore, 2 bits need to be added to the DCI to indicate the symbol index information of type 1 DMRS. The specific correspondence between the bit values ​​of the 2 bits added to the DCI and the symbol index of the added type 1 DMRS is shown in Table 5 below:

[0104] Table 5

[0105]

[0106]

[0107] According to Table 5, for example, in Figure 7 In Figure 1, corresponding to PDSCH mapping type B, the base station selects the symbol index corresponding to the first time domain position from the optional symbol index of the additional DMRS based on the second time domain position of the second signal transmission, and transmits a DCI carrying a bit field "00" to indicate that the index number for transmitting type 1 DMRS is 0, 2, or 9. The base station transmits the first signal on the symbols with index numbers 0, 2, and 9 using a frequency domain equal-interval mapping method. The terminal device receives this DCI and receives the first signal on the symbols with index numbers 0, 2, and 9. For example, in... Figure 7 In Figure 2, corresponding to PDSCH mapping type B, the base station selects the symbol index corresponding to the first time domain position from the optional symbol index of the additional DMRS based on the second time domain position of the second signal transmission, and transmits a DCI carrying a bit field "01" to indicate that the index number for transmitting type 1 DMRS is 0, 3, or 10. The base station transmits the first signal on the symbols with index numbers 0, 3, and 10 using a frequency domain equal-interval mapping method. The terminal device receives this DCI and receives the first signal on the symbols with index numbers 0, 3, and 10.

[0108] Optionally, the base station may further send second indication information. Accordingly, the terminal device receives the second indication information. This second indication information indicates at least one of the following: the number of receive or transmit antenna ports corresponding to the second time-domain location is different from the number of receive or transmit antenna ports corresponding to the first time-domain location; the number of antenna ports corresponding to the second time-domain location; and the number of antenna ports corresponding to the first time-domain location. For example, the number of antenna ports corresponding to the second time-domain location may be the maximum number of antenna ports corresponding to the second time-domain location, and the number of antenna ports corresponding to the first time-domain location may be the maximum number of antenna ports corresponding to the first time-domain location. Then, after receiving the first signal at the first time-domain location, the terminal device, according to the second indication information, knows that the radio frequency channel receiving the second signal at the second time-domain location has been converted to the radio frequency channel transmitting the first signal at the first time-domain location, affecting the first signal. Therefore, the cyclic prefix (CP) of at least one OFDM symbol of the first signal at the first time-domain location is removed, and half of the OFDM symbols from at least one symbol are used for demodulation data. For example... Figure 8 The simulation results shown are illustrated using the last half of the OFDM symbols for channel estimation. Because the frequency domain mapping rule of type 1 DMRS has an equal interval feature, the terminal device can use the last half of the OFDM symbols, which are not affected by time delay, to perform channel estimation at the first time domain position, which can reduce the loss of signal throughput to about 1%.

[0109] In another implementation, the first signal is the signal in the PDSCH. This implementation also uses a frequency-domain mapping method with equal intervals of N to transmit the PDSCH; that is, the PDSCH signal is transmitted on REs with intervals of N, and no data is transmitted on REs with intervals of N, where N is greater than or equal to 1.

[0110] like Figure 9 The diagram shows the relative positions of the PDSCH and the second signal. The second signal occupies two symbols in each time slot and is transmitted at equal intervals. The second time-domain position for transmitting the second signal can be flexibly configured. The PDSCH is transmitted at the first time-domain position affected by time delay.

[0111] Specifically, taking N=1 as an example, such as Figure 9 In the first pattern shown, the second signal is transmitted on the second symbol (symbol index starts from 0, the symbol index corresponding to the second symbol is 1) and the ninth symbol (symbol index is 8). Therefore, the first indication information includes symbol indices 2 and 9, which are used to indicate the first time-domain positions as the third symbol (symbol index 2) and the tenth symbol (symbol index 9). Figure 9In the second diagram shown, the second signal is transmitted on symbols with symbol indices 3 and 10. Therefore, the first indication information includes symbol indices 4 and 11, and the symbols corresponding to symbol indices 4 and 11 serve as the first time-domain position. Figure 9 In the third diagram shown, the second signal is transmitted on symbols with indexes 4 and 11. Therefore, the first indication information includes indexes 5 and 12, and the symbols corresponding to indices 5 and 12 serve as the first time-domain position. Figure 9 In the fourth pattern shown, the second signal is transmitted on the symbols with symbol indices 5 and 12. The first indication information includes symbol indices 6 and 13, and the symbols corresponding to symbol indices 6 and 13 are used as the first time domain positions.

[0112] After receiving the first signal at the first time domain position, the terminal device uses the last 1 / 2 OFDM symbol of the first time domain position to perform frequency domain equalization. That is, the frequency domain resource mapping of the PDSCH signal at the first time domain position needs to be transmitted at equal intervals.

[0113] exist Figure 9 In this process, except for mapping the first signal at the first time domain position and mapping the second signal at the second time domain position, the remaining time domain positions are used to transmit PDCCH, DMRS, and PDSCH. Furthermore, except for the PDSCH signal at the first time domain position, all PDSCH signals on other symbols are transmitted on the RE of the frequency domain resources, i.e., equal interval transmission is not adopted.

[0114] The first time-domain location can be carried via DCI. Specifically, in Figure 9 In the DCI, the index numbers corresponding to the second time-domain position may be: 1 and 8; 3 and 10; 4 and 11; 5 and 12. Therefore, the index numbers corresponding to the first time-domain position may be: 2 and 9; 4 and 11; 5 and 12; 6 and 13. This DCI requires the addition of 2 bits to indicate the first time-domain position. The specific correspondence between the bit values ​​of the 2 added bits in the DCI and the symbol indices corresponding to the first signal is shown in Table 6 below:

[0115] Table 6

[0116] DCI bit field Symbol index corresponding to PDSCH sent at equal intervals 00 2,9 01 4,11 10 5,12 11 6,13

[0117] The base station transmits PDSCH signals at equal intervals at a first time domain location, and the terminal device receives these PDSCH signals at the same first time domain location. Additionally, the base station also transmits radar signals at a second time domain location. Because the PDSCH signal at the first time domain location has some empty REs (... Figure 9 The blank space in the middle is the empty RE) does not transmit signals. Power boosting can be performed on the RE that transmits PDSCH at the first time domain position to increase the power of the signal on the RE and reduce communication performance loss.

[0118] One way to enhance power is for the base station to increase the power of all REs carrying the PDSCH signal by a first set value, for example, 3dB.

[0119] Another method of power enhancement is to configure whether to perform power enhancement via RRC. If power enhancement is configured, the enhanced power value is also configured as a first configured value. Then the base station enhances the power of all REs carrying PDSCH signals by the first configured value as a whole.

[0120] like Figure 9 As shown, the spare RE in the two first time domain positions occupies 7.1% of the frequency domain resources in one time slot, that is, the overhead of the spare RE is 7.1%. Compared with the prior art, the overhead of punching out the two first time domain positions is lower, and the impact of latency on communication performance can be reduced.

[0121] After receiving the first signal at the first time domain location, the terminal device knows that the radio frequency channel receiving the second signal at the second time domain location is converted into the radio frequency channel transmitting the first signal at the first time domain location, which affects the first signal. Therefore, the CP of at least one OFDM symbol of the first signal at the first time domain location is removed, and half of the at least one OFDM symbol is used as the signal of the other half of the OFDM symbol. The processed at least one OFDM symbol is used for demodulation data, which can reduce the throughput loss to 1%.

[0122] According to an embodiment of this application, a communication method is provided in which a first signal with frequency-domain equal-interval mapping is transmitted at a first time domain position adjacent to a second time domain position. The signal on the last half of the symbols at the first time domain position that is not affected by time delay can be used for data demodulation, thereby reducing the loss of signal performance caused by the time delay in the process of converting the radio frequency channel for receiving echo signals into the radio frequency channel for transmitting communication signals.

[0123] It is understood that, in order to achieve the functions in the above embodiments, the base station and terminal equipment include hardware structures and / or software modules corresponding to perform each function. Those skilled in the art should recognize that, based on the units and method steps of the various examples described in conjunction with the embodiments disclosed in this application, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0124] Figure 10 and Figure 11 The diagram illustrates the possible structures of communication devices provided in the embodiments of this application. These communication devices can be used to implement the functions of terminal devices or base stations in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments.

[0125] like Figure 10 As shown, the communication device 1000 includes a processing unit 1010 and a transceiver unit 1020. The communication device 1000 is used to implement the above-mentioned... Figure 6 The method embodiments shown illustrate the functions of the terminal device or base station.

[0126] When the communication device 1000 is used to implement Figure 6 In the method embodiment shown, the terminal device functions as follows: the transceiver unit 1020 is used to receive first indication information, the first indication information including a first time domain position, the first time domain position being used to transmit a first signal, the first signal being transmitted using a frequency domain equal-interval mapping method, the first time domain position being adjacent to a second time domain position, the second time domain position being used to transmit a second signal, and the second signal having a different number of antenna ports than the first signal; and the transceiver unit 1020 is also used to receive the first signal at the first time domain position according to the first indication information.

[0127] When the communication device 1000 is used to implement Figure 8 In the method embodiment shown, the base station functions as follows: the transceiver unit 1020 is used to send first indication information, the first indication information including a first time domain position, the first time domain position being used to transmit a first signal, the first signal being transmitted using a frequency domain equal-interval mapping method, the first time domain position being adjacent to a second time domain position, the second time domain position being used to transmit a second signal, the second signal having a different number of antenna ports than the first signal; and the transceiver unit 1020 is also used to send the first signal at the first time domain position according to the first indication information.

[0128] For a more detailed description of the processing unit 1010 and the transceiver unit 1020, please refer to [link / reference needed]. Figure 6 The relevant descriptions in the method embodiments shown are directly obtained and will not be repeated here.

[0129] like Figure 11 As shown, the communication device 1100 includes a processor 1110 and an interface circuit 1120. The processor 1110 and the interface circuit 1120 are coupled to each other. It is understood that the interface circuit 1120 can be a transceiver or an input / output interface. Optionally, the communication device 1100 may also include a memory 1130 for storing instructions executed by the processor 1110, or storing input data required by the processor 1110 to execute instructions, or storing data generated after the processor 1110 executes instructions.

[0130] When the communication device 1100 is used to implement Figure 6In the method shown, processor 1110 is used to implement the functions of the processing unit 1010, and interface circuit 1120 is used to implement the functions of the transceiver unit 1020.

[0131] When the aforementioned communication device is a chip applied to a terminal device, the terminal device chip implements the functions of the terminal device in the above method embodiments. The terminal device chip receives information from other modules (such as a radio frequency module or antenna) in the terminal device, the information being sent to the terminal device by the base station; or, the terminal device chip sends information to other modules (such as a radio frequency module or antenna) in the terminal device, the information being sent to the base station by the terminal device.

[0132] When the aforementioned communication device is a chip applied to a base station, the base station chip implements the functions of the base station in the above method embodiments. The base station chip receives information from other modules (such as radio frequency modules or antennas) in the base station, which is information sent by the terminal device to the base station; or, the base station chip sends information to other modules (such as radio frequency modules or antennas) in the base station, which is information sent by the base station to the terminal device.

[0133] It is understood that the processor in the embodiments of this application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. A general-purpose processor may be a microprocessor or any conventional processor.

[0134] The method steps in the embodiments of this application can be implemented in hardware or by a processor executing software instructions. The software instructions can consist of corresponding software modules, which can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disks, portable hard disks, CD-ROMs, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and storage medium can reside in an ASIC. Furthermore, the ASIC can reside in a base station or terminal device. Alternatively, the processor and storage medium can exist as discrete components in the base station or terminal device.

[0135] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of this application are performed entirely or partially. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a base station, a user equipment, or other programmable device. The computer program or instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions can be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; it can also be an optical medium, such as a digital video optical disc; or it can be a semiconductor medium, such as a solid-state drive.

[0136] In the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of different embodiments are consistent and can be referenced by each other. The technical features of different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0137] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. In the textual description of this application, the character " / " generally indicates an "or" relationship between the preceding and following related objects; in the formulas of this application, the character " / " indicates a "division" relationship between the preceding and following related objects.

[0138] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application. The order of the process numbers described above does not imply the order of execution; the execution order of each process should be determined by its function and internal logic.

Claims

1. A communication method, characterized in that, The method includes: Receive first indication information, the first indication information includes a first time domain position, the first time domain position is used to transmit a first signal, the first signal is transmitted in a frequency domain equal interval mapping manner, the first time domain position is adjacent to a second time domain position, the second time domain position is used to transmit a second signal, the number of antenna ports corresponding to the second signal is different from that of the first signal, and the number of receiving or transmitting radio frequency channels corresponding to the second signal is different from that of the first signal. The first signal is received at the first time domain location according to the first indication information.

2. The method of claim 1, wherein, The first signal is a demodulation reference signal of the first type, and the first time-domain position includes candidate positions of additional demodulation reference signals; For physical downlink shared signal mapping type A, the candidate positions of the additional demodulation reference signal include at least one of the following symbol indices: 4, 5, 6, 10, 11, 12, 13; and / or For physical downlink shared signal mapping type B, the candidate positions of the additional demodulation reference signal include at least one of the following symbol indices: 2, 3, 4, 5, 9, 10, 11, 12.

3. The method of claim 1, wherein, The first time-domain position includes at least one additional demodulation reference signal, wherein one of the additional demodulation reference signals is spaced X symbols apart from the preceding reference signal, where X is the number of symbols between the two time-slot positions of the second signal in one time slot; or The first time-domain position includes at least two additional demodulation reference signals, wherein the interval between the two additional demodulation reference signals is Y symbols, where Y is the number of symbols between the two time-domain positions of the second signal in one time slot.

4. The method according to claim 1, characterized in that, The first signal is a signal in the physical downlink shared channel, and the first time domain position includes at least one of the following symbol indices: 2, 9, 4, 11, 5, 12, 6, 13.

5. The method according to any one of claims 1 to 4, characterized in that, The method further includes: Receive second indication information, the second indication information being used to indicate at least one of the following: the number of antenna ports corresponding to the second time domain position is different from that corresponding to the first time domain position, the number of antenna ports corresponding to the second time domain position, and the number of antenna ports corresponding to the first time domain position.

6. The method according to any one of claims 1 to 4, characterized in that, The method further includes: The cyclic prefix of the signal from which at least one orthogonal frequency division multiplexing (OFDM) symbol of the first signal at the first time domain position is removed; The signal of half of the OFDM symbol in the at least one symbol is used to demodulate data, or the signal of half of the OFDM symbol in the at least one OFDM symbol is used as the signal of the other half of the OFDM symbol, and the processed at least one OFDM symbol is used to demodulate data.

7. A communication method characterized by comprising: The method includes: Send first indication information, the first indication information includes a first time domain position, the first time domain position is used to transmit a first signal, the first signal is transmitted in a frequency domain equal interval mapping manner, the first time domain position is adjacent to a second time domain position, the second time domain position is used to transmit a second signal, the number of antenna ports corresponding to the second signal is different from that of the first signal, and the number of receiving or transmitting radio frequency channels corresponding to the second signal is different from that of the first signal. The first signal is transmitted at the first time domain location according to the first instruction information.

8. The method of claim 7, wherein, The first signal is a demodulation reference signal of the first type, and the first time-domain position includes candidate positions of additional demodulation reference signals; For physical downlink shared signal mapping type A, the candidate positions of the additional demodulation reference signal include at least one of the following symbol indices: 4, 5, 6, 10, 11, 12, 13; and / or For physical downlink shared signal mapping type B, the candidate positions of the additional demodulation reference signal include at least one of the following symbol indices: 2, 3, 4, 5, 9, 10, 11, 12.

9. The method of claim 7, wherein, The first time-domain position includes at least one additional demodulation reference signal, wherein one of the additional demodulation reference signals is spaced X symbols apart from the preceding reference signal, where X is the number of symbols between the two time-slot positions of the second signal in one time slot; or The first time-domain position includes at least two additional demodulation reference signals, wherein the interval between the two additional demodulation reference signals is Y symbols, where Y is the number of symbols between the two time-domain positions of the second signal in one time slot.

10. The method of claim 7, wherein, The first signal is a signal in the physical downlink shared channel, and the first time domain position includes at least one of the following symbol indices: 2, 9, 4, 11, 5, 12, 6, 13.

11. The method of claim 10, wherein, The method further includes: Power enhancement is performed on the resource unit that transmits the first signal at the first time domain location.

12. The method of any one of claims 7-11, wherein, The method further includes: Send a second indication message, which indicates at least one of the following: the number of antenna ports corresponding to the second time domain location is different from the number of antenna ports corresponding to the first time domain location, the number of antenna ports corresponding to the second time domain location, and the number of antenna ports corresponding to the first time domain location.

13. A communications device, characterized by The device includes a transceiver unit; wherein... The transceiver unit is used to receive first indication information, the first indication information including a first time domain position, the first time domain position is used to transmit a first signal, the first signal is transmitted in a frequency domain equal interval mapping manner, the first time domain position is adjacent to a second time domain position, the second time domain position is used to transmit a second signal, the number of antenna ports corresponding to the second signal is different from that of the first signal, and the number of receiving or transmitting radio frequency channels corresponding to the second signal is different from that of the first signal. The transceiver unit is further configured to receive the first signal at the first time domain location according to the first indication information.

14. The apparatus according to claim 13, characterized in that, The first signal is a demodulation reference signal of the first type, and the first time-domain position includes candidate positions of additional demodulation reference signals; For physical downlink shared signal mapping type A, the candidate positions of the additional demodulation reference signal include at least one of the following symbol indices: 4, 5, 6, 10, 11, 12, 13; and / or For physical downlink shared signal mapping type B, the candidate positions of the additional demodulation reference signal include at least one of the following symbol indices: 2, 3, 4, 5, 9, 10, 11, 12.

15. The apparatus of claim 13, wherein, The first time-domain position includes at least one additional demodulation reference signal, wherein one of the additional demodulation reference signals is spaced X symbols apart from the preceding reference signal, where X is the number of symbols between the two time-slot positions of the second signal in one time slot; or The first time-domain position includes at least two additional demodulation reference signals, wherein the interval between the two additional demodulation reference signals is Y symbols, where Y is the number of symbols between the two time-domain positions of the second signal in one time slot.

16. The apparatus of claim 13, wherein, The first signal is a signal in the physical downlink shared channel, and the first time domain position includes at least one of the following symbol indices: 2, 9, 4, 11, 5, 12, 6, 13.

17. The apparatus of any one of claims 13-16, wherein, The transceiver unit is further configured to receive second indication information, the second indication information being configured to indicate at least one of the following: the number of antenna ports corresponding to the second time domain position is different from the number of antenna ports corresponding to the first time domain position, the number of antenna ports corresponding to the second time domain position, and the number of antenna ports corresponding to the first time domain position.

18. The apparatus of any one of claims 13-16, wherein, The device further includes: a processing unit; wherein: The processing unit is used to remove the cyclic prefix of at least one orthogonal frequency division multiplexing (OFDM) symbol of the first signal at the first time domain position; The processing unit is further configured to use the signal of half of the OFDM symbols in the at least one symbol for demodulating data, or to use the signal of half of the OFDM symbols in the at least one OFDM symbol as the signal of the other half of the OFDM symbol, and use the processed at least one OFDM symbol for demodulating data.

19. A communications device, characterized by The device includes a transceiver unit; wherein... The transceiver unit is used to send first indication information, the first indication information including a first time domain position, the first time domain position is used to transmit a first signal, the first signal is transmitted in a frequency domain equal interval mapping manner, the first time domain position is adjacent to a second time domain position, the second time domain position is used to transmit a second signal, the number of antenna ports corresponding to the second signal is different from that of the first signal, and the number of receiving or transmitting radio frequency channels corresponding to the second signal is different from that of the first signal. The transceiver unit is further configured to transmit the first signal at the first time domain location according to the first indication information.

20. The apparatus of claim 19, wherein, The first signal is a demodulation reference signal of the first type, and the first time-domain position includes candidate positions of additional demodulation reference signals; For physical downlink shared signal mapping type A, the candidate positions of the additional demodulation reference signal include at least one of the following symbol indices: 4, 5, 6, 10, 11, 12, 13; and / or For physical downlink shared signal mapping type B, the candidate positions of the additional demodulation reference signal include at least one of the following symbol indices: 2, 3, 4, 5, 9, 10, 11, 12.

21. The apparatus of claim 19, wherein, The first time-domain position includes at least one additional demodulation reference signal, wherein one of the additional demodulation reference signals is spaced X symbols apart from the preceding reference signal, where X is the number of symbols between the two time-slot positions of the second signal in one time slot; or The first time-domain position includes at least two additional demodulation reference signals, wherein the interval between the two additional demodulation reference signals is Y symbols, where Y is the number of symbols between the two time-domain positions of the second signal in one time slot.

22. The apparatus of claim 19, wherein, The first signal is a signal in the physical downlink shared channel, and the first time domain position includes at least one of the following symbol indices: 2, 9, 4, 11, 5, 12, 6, 13.

23. The apparatus according to claim 22, characterized in that, The device also includes a processing unit; The processing unit is used to enhance the power of the resource unit that transmits the first signal at the first time domain location.

24. The apparatus of any one of claims 19-23, wherein, The transceiver unit is further configured to send second indication information, the second indication information being configured to indicate at least one of the following: the number of antenna ports corresponding to the second time domain position is different from the number of antenna ports corresponding to the first time domain position, the number of antenna ports corresponding to the second time domain position, and the number of antenna ports corresponding to the first time domain position.

25. A communications device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein, When the processor executes the computer program, it implements the method as described in any one of claims 1 to 6, or implements the method as described in any one of claims 7 to 12.

26. A communications device, characterized by The method includes a processor configured to be coupled to a memory, read instructions from the memory, and implement the method as described in any one of claims 1 to 6, or implement the method as described in any one of claims 7 to 12, according to the instructions.

27. A computer readable storage medium having stored thereon a computer program, characterized in that, When the program is executed by the processor, it implements the method as described in any one of claims 1 to 6, or the method as described in any one of claims 7 to 12.

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