Signal transmission method and device

Abstract

The embodiment of the invention discloses a signal transmission method and device, relates to the technical field of communication, and can effectively improve the coverage capability of public signals. The method comprises: receiving a first common signal and a first demodulation reference signal from a network device, the first common signal being carried on a downlink control channel, and the first demodulation reference signal being used for demodulating the first common signal; wherein the time domain resource of the first common signal is different from the time domain resource of the first demodulation reference signal.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to a signal transmission method and apparatus. Background Art

[0002] In a wireless communication system, in order to avoid the influence of data signals on common signals during signal transmission, the transmission channels and beams of common signals and data signals can be decoupled to improve the coverage ability of common signals.

[0003] However, current common signals are usually signals with a cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM) waveform. The peak-to-average power ratio (PAPR) of common signals with a CP-OFDM waveform is generally high, and PAPR also affects the coverage ability of signals. Thus, even if the transmission channels of common signals and data signals are decoupled, the improvement in the coverage ability of common signals is limited, resulting in a still weak coverage ability of common signals. Summary of the Invention

[0004] Embodiments of this application provide a signal transmission method and apparatus, which can effectively improve the coverage ability of common signals.

[0005] In a first aspect, a signal transmission method is provided. This method can be executed by a terminal, or by components of a terminal, such as a processor, a chip, or a chip system of the terminal, or can also be implemented by a logic module or software that can implement all or part of the terminal. Hereinafter, an example in which this method is executed by a terminal is used for illustration. The signal transmission method includes: receiving a first common signal and a first demodulation reference signal from a network device, where the first common signal is carried on a downlink control channel, and the first demodulation reference signal is used to demodulate the first common signal; wherein, the time domain resources of the first common signal and the time domain resources of the first demodulation reference signal are different.

[0006] In an embodiment of the present application, the terminal may receive a first common signal carried on a downlink control channel from a network device, and a first demodulation reference signal for demodulating the first common signal. During the transmission of the first common signal and the first demodulation reference signal, the network device differentiates the time-domain resources of the first common signal and the time-domain resources of the first demodulation reference signal, so that the time-domain resources of the first common signal and the time-domain resources of the first demodulation reference signal are different, thus avoiding the first demodulation reference signal from affecting the single-carrier characteristic of the first common signal, enabling the first common signal to have the single-carrier characteristic, that is, making the PAPR of the first common signal relatively low, effectively reducing the negative impact of the PAPR on the coverage ability of the common signal, and thereby effectively improving the coverage ability of the common signal.

[0007] Combined with the first aspect above, in a possible implementation manner, the method provided by the embodiment of the present application further includes: receiving first information from a network device; wherein the first information is used to indicate at least one of the following: the time-domain resources of the first common signal, the frequency-domain resources of the first common signal, the time-domain resources of the first demodulation reference signal, or the frequency-domain resources of the first demodulation reference signal.

[0008] That is to say, the terminal can obtain at least one of the time-domain resources of the first common signal, the frequency-domain resources of the first common signal, the time-domain resources of the first demodulation reference signal, or the frequency-domain resources of the first demodulation reference signal from the network device side through the first information, so that the terminal can receive the first common signal and / or the first demodulation reference signal from the network device based on the first information.

[0009] Combined with the first aspect above, in a possible implementation manner, the first information is further used to indicate the transmission waveform of the first common signal.

[0010] Since the present application can be applied to a scenario of transmission waveform switching, for example, the transmission waveform is switched from a CP-OFDM waveform to a discrete fourier transformation-spreading-orthogonal frequency division multiplexing (DFT-s-OFDM) waveform, the terminal can directly obtain the transmission waveform of the first common signal from the network device side through the first information. This can not only clearly inform the terminal of the transmission waveform of the first common signal to avoid the situation of transmission waveform confusion, but also save the signaling overhead of additionally indicating the transmission waveform of the first common signal.

[0011] Combined with the first aspect above, in a possible implementation, the time-frequency resources of the first common signal are different from the time-domain resources of the third common signal, where the third common signal is carried on the broadcast channel and the third common signal includes first information.

[0012] That is to say, the network device can distinguish the time-domain resources of the first common signal and the time-domain resources of the third common signal, so that the time-frequency resources of the first common signal are different from the time-domain resources of the third common signal, thus avoiding the overlap of the time-domain resources of the first common signal and the time-domain resources of the third common signal, and further ensuring the single-carrier characteristic of the first common signal. That is to say, it further ensures that the PAPR of the first common signal is within a lower range, effectively reducing the negative impact of PAPR on the coverage ability of the common signal, and thus effectively improving the coverage ability of the common signal.

[0013] Combined with the first aspect above, in a possible implementation, the third common signal is used to indicate the transmission waveform of the first common signal, where the transmission waveform of the first common signal is indicated by at least one of the following third common signals: the first demodulation reference signal sequence, or the primary synchronization signal PSS / secondary synchronization signal SSS sequence. However, there is a corresponding relationship between the transmission waveform of the first common signal and the first demodulation reference signal sequence, and there is a corresponding relationship between the transmission waveform of the first common signal and the PSS / SSS sequence.

[0014] Since this application can be applied to the scenario of transmission waveform switching, for example, the transmission waveform is switched from the CP-OFDM waveform to the DFT-s-OFDM waveform, the terminal can indirectly obtain the transmission waveform of the first common signal from the network device side through the signal sequence in the third common signal (for example, the demodulation reference signal sequence and / or the PSS / SSS sequence). In this way, the terminal can indirectly determine the transmission waveform of the first common signal through the signal sequence indicated by the third common signal and the pre-configured corresponding relationship, so as to avoid the situation of transmission waveform disorder and save the signaling overhead of additionally indicating the transmission waveform of the first common signal.

[0015] Combined with the first aspect above, in a possible implementation, the transmission methods of the first common signal and the first demodulation reference signal are the same, which can enable the first demodulation reference signal to be used for demodulating the first common signal.

[0016] Combined with the first aspect above, in a possible implementation, the transmission waveform of the first common signal is the same as the transmission waveform of the second common signal carried on the downlink data channel, and / or the modulation method of the first common signal is the same as the modulation method of the second common signal carried on the downlink data channel.

[0017] The transmission waveforms of the first common signal and the second common signal are the same, which can reduce the complexity of the terminal in processing the common signal, thereby improving the processing efficiency of the terminal and reducing the signaling overhead. In addition, in addition to directly indicating that the transmission waveforms are the same, since there is a corresponding relationship between the transmission waveform and the modulation method, the terminal can indirectly indicate the relationship between the transmission waveform of the first common signal and the transmission waveform of the second common signal through the relationship between the modulation method of the first common signal and the modulation method of the second common signal, that is, the same modulation method of the first common signal and the second common signal can be understood as the same transmission waveform of the first common signal and the second common signal, which can also improve the processing efficiency of the terminal and reduce the signaling overhead.

[0018] Combined with the above first aspect, in a possible implementation, under the first condition, the first demodulation reference signal is further used to demodulate the second common signal; wherein, the first condition includes at least one of the following: the transmission methods of the first common signal and the second common signal are the same; the transmission methods of the first common signal and the first demodulation reference signal are the same; the transmission methods of the second common signal and the first demodulation reference signal are the same; or, the transmission methods of the first demodulation reference signal and the second demodulation reference signal are the same; the second demodulation reference signal is used to demodulate the second common signal.

[0019] That is to say, the network device makes the transmission methods of the first common signal or the first demodulation reference signal related to the downlink control channel and the second common signal or the second demodulation reference signal associated with the downlink data channel the same, so that the first demodulation reference signal associated with the downlink control channel can be used to demodulate the second common signal associated with the downlink data channel to achieve the multiplexing of the demodulation reference signal, and the multiplexing of the demodulation reference signal can improve the accuracy of channel estimation or reduce the signaling overhead.

[0020] Combined with the above first aspect, in a possible implementation, when the time domain resources of the first demodulation reference signal and the time domain resources of the second demodulation reference signal are different, the first demodulation reference signal and the second demodulation reference signal are used to jointly demodulate the second common signal, which can improve the accuracy of channel estimation and thus improve the accuracy of demodulating the second common signal; or, the first demodulation reference signal and the second demodulation reference signal are both the third demodulation reference signal, and the third demodulation reference signal is used to demodulate the first common signal and the second common signal, so that the network device can transmit the third demodulation reference signal to demodulate the first common signal and the second common signal, thereby reducing the signaling overhead.

[0021] Combined with the above first aspect, in a possible implementation, the same transmission method includes at least one of the following: the channel parameters are the same, the precoding is the same, the antenna port numbers are the same, or the precoding granularity is the same, where the precoding granularity is the full-band precoding granularity.

[0022] In this way, whether the channels experienced by two signals are the same can be directly or indirectly reflected by channel parameters, precoding, antenna port numbers, and precoding granularity, simplifying system design and improving the flexibility of reflecting whether the transmission modes are the same. Additionally, in the DFT-s-OFDM scenario, the precoding granularity not only needs to be the same but also needs to be full-band precoding granularity to avoid destroying the single-carrier characteristics of the signal.

[0023] Combined with the first aspect above, in a possible implementation, the transmission waveform is a DFT-s-OFDM waveform, so that the signal transmission method described in this application can be applied to the DFT-s-OFDM scenario, enriching the application scenarios of the solution provided in this application.

[0024] In a second aspect, a signal transmission method is provided. This method can be executed by a network device, or by components of a network device, such as a processor, chip, or chip system of the network device, or can also be implemented by a logic module or software that can implement all or part of the network device. The following takes the example that this method is executed by a network device for illustration. The signal transmission method includes: sending a first common signal and a first demodulation reference signal to a terminal, where the first common signal is carried on a downlink control channel, and the first demodulation reference signal is used to demodulate the first common signal; among them, the time-domain resources of the first common signal and the time-domain resources of the first demodulation reference signal are different.

[0025] Combined with the second aspect above, in a possible implementation, the method provided in the embodiments of this application further includes: sending first information to the terminal; where the first information is used to indicate at least one of the following: the time-domain resources of the first common signal, the frequency-domain resources of the first common signal, the time-domain resources of the first demodulation reference signal, or the frequency-domain resources of the first demodulation reference signal.

[0026] Combined with the second aspect above, in a possible implementation, the first information is further used to indicate the transmission waveform of the first common signal.

[0027] Combined with the second aspect above, in a possible implementation, the time-frequency resources of the first common signal are different from the time-domain resources of a third common signal, where the third common signal is carried on a broadcast channel, and the third common signal includes the first information.

[0028] Combined with the above second aspect, in a possible implementation, the third common signal is used to indicate the transmission waveform of the first common signal, where the transmission waveform of the first common signal is indicated by at least one of the following third common signals: the first demodulation reference signal sequence, or the primary synchronization signal PSS / secondary synchronization signal SSS sequence. However, there is a corresponding relationship between the transmission waveform of the first common signal and the first demodulation reference signal sequence, and there is a corresponding relationship between the transmission waveform of the first common signal and the PSS / SSS sequence.

[0029] Combined with the above second aspect, in a possible implementation, the first common signal and the first demodulation reference signal are transmitted in the same way.

[0030] Combined with the above second aspect, in a possible implementation, the transmission waveform of the first common signal is the same as the transmission waveform of the second common signal, and / or, the modulation method of the first common signal is the same as the modulation method of the second common signal, where the second common signal is carried on the downlink data channel.

[0031] Combined with the above second aspect, in a possible implementation, under the first condition, the first demodulation reference signal is further used to demodulate the second common signal; where the first condition includes at least one of the following: the first common signal and the second common signal are transmitted in the same way; the first common signal and the second demodulation reference signal are transmitted in the same way; the second common signal and the first demodulation reference signal are transmitted in the same way; or, the first demodulation reference signal and the second demodulation reference signal are transmitted in the same way; the second demodulation reference signal is used to demodulate the second common signal.

[0032] Combined with the above second aspect, in a possible implementation, when the time-domain resources of the first demodulation reference signal and the time-domain resources of the second demodulation reference signal are different, the first demodulation reference signal and the second demodulation reference signal are used to jointly demodulate the second common signal; or, the first demodulation reference signal and the second demodulation reference signal are both the third demodulation reference signal, and the third demodulation reference signal is used to demodulate the first common signal and the second common signal.

[0033] Combined with the above second aspect, in a possible implementation, the same transmission method includes at least one of the following: the same channel parameters, the same precoding, the same antenna port number, or the same precoding granularity, where the precoding granularity is the full-band precoding granularity.

[0034] Combined with the above second aspect, in a possible implementation, the transmission waveform is the DFT-s-OFDM waveform.

[0035] Among them, for the technical effects brought by the second aspect or any implementation manner in the second aspect, reference can be made to the technical effects brought by the corresponding implementation manner in the first aspect, which will not be elaborated here.

[0036] In a third aspect, a communication device is provided for implementing the above various methods. The communication device may be the terminal in the first aspect above, or any implementation manner in the first aspect, or a device including the above terminal, or a device included in the above terminal, such as a chip; or, the communication device may be the network device in the second aspect above, or any implementation manner in the second aspect, or a device including the above network device, or a device included in the above network device, such as a chip. The communication device includes corresponding modules, units, or means for implementing the above methods, and the modules, units, or means may be implemented by hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions.

[0037] In some possible designs, the communication device may include a processing module and a transceiver module. The transceiver module, which may also be referred to as a transceiver unit, is used to implement the sending and / or receiving functions in any of the above aspects and any possible implementation manners thereof. The transceiver module may be composed of a transceiver circuit, a transceiver, a transceiver, or a communication interface. The processing module may be used to implement the processing functions in any of the above aspects and any possible implementation manners thereof.

[0038] In some possible designs, the transceiver module includes a sending module and a receiving module, which are respectively used to implement the sending and receiving functions in any of the above aspects and any possible implementation manners thereof.

[0039] In a fourth aspect, a communication device is provided, including: a processor and a memory; the memory is used to store computer instructions, and when the processor executes the instructions, the communication device is caused to execute the methods in any of the above aspects. The communication device may be the terminal in the first aspect above, or any implementation manner in the first aspect, or a device including the above terminal, or a device included in the above terminal, such as a chip; or, the communication device may be the network device in the second aspect above, or any implementation manner in the second aspect, or a device including the above network device, or a device included in the above network device, such as a chip.

[0040] In a fifth aspect, a communication device is provided, including: a processor and a communication interface; the communication interface is used for communicating with a module outside the communication device; the processor is used for executing a computer program or instruction to enable the communication device to execute the method of any of the above aspects. The communication device may be the terminal in the first aspect above, or any implementation manner in the first aspect, or a device including the above terminal, or a device included in the above terminal, such as a chip; or, the communication device may be the network device in the second aspect above, or any implementation manner in the second aspect, or a device including the above network device, or a device included in the above network device, such as a chip.

[0041] In a sixth aspect, a communication device is provided, including: at least one processor; the processor is used for executing a computer program or instruction stored in a memory to enable the communication device to execute the method of any of the above aspects. The memory may be coupled to the processor, or may be independent of the processor. The communication device may be the terminal in the first aspect above, or any implementation manner in the first aspect, or a device including the above terminal, or a device included in the above terminal, such as a chip; or, the communication device may be the network device in the second aspect above, or any implementation manner in the second aspect, or a device including the above network device, or a device included in the above network device, such as a chip.

[0042] As another implementation manner, the above communication device may include a processor for implementing the functions involved in any of the above aspects or any of its implementation manners. Optionally, in some possible designs, the communication device may further include a memory for storing necessary program instructions and data.

[0043] In addition, when the above communication device is a chip system, the above communication may be composed of chips, or may include chips and other discrete devices. In this case, when the communication device provided in any of the third aspect to the sixth aspect is a chip, the above sending action / function may be understood as output, and the above receiving action / function may be understood as input.

[0044] In a seventh aspect, a computer-readable storage medium is provided, in which a computer program or instruction is stored. When it runs on a communication device, it enables the communication device to execute the method of any of the above aspects or any of its implementation manners.

[0045] In an eighth aspect, a computer program product including instructions is provided. When it runs on a communication device, it enables the communication device to execute the method of any of the above aspects or any of its implementation manners.

[0046] In a ninth aspect, there is provided a signal transmission method, which includes the method of the first aspect or any of its implementation manners, and the method of the second aspect or any of its implementation manners.

[0047] In a tenth aspect, there is provided a communication system, which includes a terminal of the above aspect and a network device of the above aspect.

[0048] For any implementation manner among the third aspect to the tenth aspect, the technical effects brought thereby can be referred to the technical effects brought by the corresponding implementation manner of the first aspect, which will not be elaborated herein. Description of the Drawings

[0049] Figure 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application;

[0050] Figure 2 is a schematic structural diagram of a transmission resource provided by an embodiment of the present application;

[0051] Figure 3 is a schematic diagram of three demodulation reference signal patterns provided by an embodiment of the present application;

[0052] Figure 4 is a configuration manner of a variety of common signals provided by an embodiment of the present application;

[0053] Figure 5 is a schematic diagram of a time-frequency resource reuse manner between common signals provided by an embodiment of the present application;

[0054] Figure 6 is a schematic diagram of beam non-decoupling between a common signal and a data signal provided by an embodiment of the present application;

[0055] Figure 7 is a schematic diagram of a signal transmission method flow provided by an embodiment of the present application;

[0056] Figure 8 is an example diagram of configuring time-frequency resources of a first common signal and time-frequency resources of a first demodulation reference signal provided by an embodiment of the present application;

[0057] Figure 9 is another example diagram of configuring time-frequency resources of a first common signal and time-frequency resources of a first demodulation reference signal provided by an embodiment of the present application;

[0058] Figure 10 is a schematic diagram of a full-band precoding granularity provided by an embodiment of the present application;

[0059] Figure 11It is an example diagram for configuring the time-frequency resources of a first common signal, the time-frequency resources of a second common signal, the frequency-domain resources of a first demodulation reference signal, and the frequency-domain resources of a second demodulation reference signal provided by an embodiment of the present application;

[0060] Figure 12 It is another example diagram for configuring the time-frequency resources of a first common signal, the time-frequency resources of a second common signal, the frequency-domain resources of a first demodulation reference signal, and the frequency-domain resources of a second demodulation reference signal provided by an embodiment of the present application;

[0061] Figure 13 It is another example diagram for configuring the time-frequency resources of a first common signal, the time-frequency resources of a second common signal, the frequency-domain resources of a first demodulation reference signal, and the frequency-domain resources of a second demodulation reference signal provided by an embodiment of the present application;

[0062] Figure 14 It is another example diagram for configuring the time-frequency resources of a first common signal, the time-frequency resources of a second common signal, the frequency-domain resources of a first demodulation reference signal, and the frequency-domain resources of a second demodulation reference signal provided by an embodiment of the present application;

[0063] Figure 15 It is another example diagram for configuring the time-frequency resources of a first common signal, the time-frequency resources of a second common signal, the frequency-domain resources of a first demodulation reference signal, and the frequency-domain resources of a second demodulation reference signal provided by an embodiment of the present application;

[0064] Figure 16 It is a schematic structural diagram of a communication device provided by an embodiment of the present application;

[0065] Figure 17 It is another schematic structural diagram of a communication device provided by an embodiment of the present application;

[0066] Figure 18 It is another schematic structural diagram of a communication device provided by an embodiment of the present application. Detailed implementation manners

[0067] Figure 1 It is a schematic architecture diagram of a communication system 1000 to which an embodiment of the present application is applied. As Figure 1 shown, the communication system includes a radio access network (RAN) 100, where the RAN 100 includes at least one RAN node (such as Figure 1 110a and 110b in Figure 1 , collectively referred to as 110), and may further include at least one terminal (such as Figure 1 120a - 120j in , collectively referred to as 120). The RAN 100 may further include other RAN nodes, for example, a wireless relay device and / or a wireless backhaul device ( Figure 1The terminal 120 is connected to the RAN node 110 in a wireless manner. Terminals and terminals and RAN nodes and RAN nodes can be connected to each other by wired or wireless means. The communication system 1000 may also include a core network 200. The RAN node 110 is connected to the core network 200 in a wireless or wired manner. The core network device in the core network 200 and the RAN node 110 in the RAN 100 may be independent and different physical devices, or may be the same physical device that integrates the logical functions of the core network device and the logical functions of the RAN node. The communication system 1000 may also include the Internet 300.

[0068] RAN100 may be an evolved universal terrestrial radio access (E-UTRA) system, a new radio (NR) system, and a future radio access system defined in the 3rd generation partnership project (3GPP), or a WiFi system. RAN100 may also include two or more of the above different radio access systems. RAN100 may also be an open RAN (O-RAN).

[0069] RAN node, also known as radio access network equipment, RAN entity or access node, is used to help terminals access the communication system wirelessly. In one application scenario, a RAN node can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a fifth generation (5G) mobile communication system, a next generation NodeB in a sixth generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system. A RAN node can be a macro base station (such as a Figure 1 110a), or a micro base station or an indoor station (such as Figure 1 110b) in the figure, it can also be a relay node or a donor node.

[0070] In another application scenario, wireless access for a terminal can be achieved through the cooperation of multiple RAN nodes, where different RAN nodes respectively implement some functions of a base station. For example, the RAN nodes can be a central unit (CU), a distributed unit (DU), or a radio unit (RU). Here, the CU completes the functions of the radio resource control protocol and the packet data convergence protocol (PDCP) of the base station, and can also complete the function of the service data adaptation protocol (SDAP); the DU completes the functions of the radio link control layer and the medium access control (MAC) layer of the base station, and can also complete some or all of the functions of the physical layer. For specific descriptions of the above respective protocol layers, reference can be made to the relevant technical specifications of 3GPP. The RU can be used to implement the functions of transmitting and receiving radio frequency signals. The CU and the DU can be two independent RAN nodes, or can be integrated in the same RAN node, for example, integrated in the baseband unit (BBU). The RU can be included in radio frequency equipment, for example, included in the remote radio unit (RRU) or the active antenna unit (AAU). The CU can be further divided into two types of RAN nodes, namely, CU-control plane and CU-user plane.

[0071] In different systems, the RAN nodes may have different names. For example, in the O-RAN system, the CU can be called an open CU (O-CU), the DU can be called an open DU (O-DU), and the RU can be called an open RU (O-RU). The RAN nodes in the embodiments of this application can be implemented in the form of software modules, hardware modules, or a combination of software modules and hardware modules. For example, the RAN node can be a server loaded with the corresponding software module. The embodiments of this application do not limit the specific technologies and specific device forms adopted by the RAN nodes. For the convenience of description, in the following text, a base station or a network device is used as an example of a RAN node for description.

[0072] A terminal is a device with wireless transceiver capabilities that can send signals to a base station or receive signals from a base station. A terminal can also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal, etc. Terminals can be widely applied 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 grid, smart home, smart office, smart wearables, smart transportation, smart city, etc. A terminal can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, wearable device, vehicle, aircraft, ship, robot, robotic arm, smart home device, etc. Embodiments of this application do not limit the specific technologies and specific device forms adopted by the terminal.

[0073] The base station and the terminal can be fixed in position or movable. The base station and the terminal can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on airplanes, balloons, and artificial satellites. Embodiments of this application do not limit the application scenarios of the base station and the terminal.

[0074] The roles of the base station and the terminal can be relative. For example, Figure 1 the helicopter or drone 120i in [FIGURE] can be configured as a mobile base station. For the terminals 120j that access the radio access network 100 through 120i, the terminal 120i is a base station; but for the base station 110a, 120i is a terminal, that is, the communication between 110a and 120i is through the radio air interface protocol. Of course, the communication between 110a and 120i can also be through the interface protocol between base stations. At this time, relative to 110a, 120i is also a base station. Therefore, both the base station and the terminal can be uniformly referred to as communication devices. Figure 1 The 110a and 110b in [FIGURE] can be referred to as communication devices with base station functions. Figure 1 The 120a - 120j in [FIGURE] can be referred to as communication devices with terminal functions. The air interface protocol in this application can be 5G NR, 6G, or the air interface protocol in future mobile communication systems.

[0075] Communication can be carried out between a base station and a terminal, between base stations, and between terminals through licensed spectrum, through unlicensed spectrum, or through both licensed and unlicensed spectrum simultaneously; communication can be carried out through spectrum below 6 gigahertz (GHz), through spectrum above 6 GHz, or through both spectrum below 6 GHz and spectrum above 6 GHz simultaneously. Embodiments of this application do not limit the spectrum resources used for wireless communication.

[0076] In embodiments of this application, the functions of a base station can also be performed by a module (such as a chip) in the base station or by a control subsystem with base station functions. Here, the control subsystem with base station functions can be a control center in the above application scenarios such as smart grid, industrial control, intelligent transportation, and smart city. The functions of a terminal can also be performed by a module (such as a chip or a modem) in the terminal or by a device with terminal functions.

[0077] In embodiments of this application, a time-domain symbol can be a CP-OFDM symbol or a DFT-s-OFDM symbol. Unless otherwise specified, symbols in embodiments of this application refer to time-domain symbols.

[0078] To facilitate understanding of the technical solutions provided by embodiments of this application, a brief introduction to relevant technical terms of this application is given below.

[0079] 1. CP-OFDM: It is a multi-carrier transmission waveform of frequency-division multiplexing. The signals participating in multiplexing are orthogonal. Through serial / parallel conversion, a high-speed data stream is converted into multiple parallel low-speed data streams, and then the above multiple parallel low-speed data streams are allocated to several sub-carriers with different frequencies for transmission.

[0080] It can be understood that in a traditional frequency-division multiplexing technology system, there is a guard interval between signals. That is to say, in a traditional frequency-division multiplexing technology system, the spectra of the sub-carriers carrying each signal do not overlap. However, in a CP-OFDM system, the signals are orthogonal, so that the spectra of the sub-carriers carrying each signal overlap. In this way, OFDM technology can improve spectrum utilization.

[0081] 2. DFT-s-OFDM: A derivative technology based on OFDM, also known as linear precoding OFDM technology. It mainly performs D-point discrete Fourier transform (DFT) processing on the subcarriers used when a communication device transmits multiple time-domain signals. Among them, DFT processing can also be called transform precoding processing. D is the number of resource elements (REs) included in the scheduled bandwidth, so that each of the above multiple time-domain signals can be converted from the time domain to the frequency domain, and the multiple converted frequency-domain signals are collectively subjected to OFDM modulation. Then, the above multiple frequency-domain signals are collectively converted back to the time domain, and subsequently, the communication device can transmit these multiple time-domain signals.

[0082] 3. Downlink control channel and downlink data channel

[0083] During the downlink transmission process, the signals sent by the network device to the terminal are also called downlink signals. Downlink signals include downlink control signals and downlink data signals. The downlink control channel in the embodiments of this application is a channel carrying downlink control signals. The downlink control channel in the embodiments of this application can also be understood as a downlink control signal. The downlink control channel can be a physical downlink control channel (PDCCH). The downlink control channel in the embodiments of this application can be understood as a channel carrying downlink data signals and can also be understood as a downlink data signal. The downlink data channel can be a physical downlink shared channel (PDSCH). For the higher layer, these channels correspond to the REs carrying the bit information of the upper layer (such as layer 2); for the air interface, wireless signals are carried on these channels.

[0084] The downlink control channel is used to schedule the downlink data channel. For example, the PDCCH is used to transmit scheduling and configuration information related to the PDSCH. The PDCCH carries downlink control information (DCI), and the DCI is used to indicate the configuration information of the PDSCH (such as time / frequency position, modulation information, etc.).

[0085] The downlink data channel is used to transmit downlink data. The time-domain resources of the downlink data can be determined by the start symbol and the number of consecutive symbols indicated by the time-domain resource allocation field in the DCI, while the frequency-domain resources of the downlink data can be determined by the frequency-domain resource allocation field in the DCI.

[0086] It can be understood that in the embodiments of the present application, the PDSCH and PDCCH are taken as examples of the downlink data channel and the downlink control channel respectively. In different systems and different scenarios, the downlink data channel and the downlink control channel may have different names, and the embodiments of the present application do not make any limitations thereto.

[0087] 4. Modulation and Demodulation

[0088] Modulation is a process of processing the information of the signal source and adding it to the carrier to make it into a form suitable for channel transmission. Different modes correspond to different modulation methods. For example, multi-carrier modulation, single-carrier modulation, quadrature amplitude modulation (QAM), pulse amplitude modulation (PAM), phase shift keying (PSK) modulation, amplitude shift keying (ASK) modulation and other modulation methods. Demodulation is the inverse process of modulation, which is to recover the original data bits or symbols from the signal. Demodulation can also be called detection, and the embodiments of the present application do not make any limitations thereto.

[0089] 5. Reference Signal

[0090] The reference signal (RS) is used to obtain the influence of external factors (such as the spatial channel, non-ideality of the transmitting or receiving end device) on the signal during transmission, for channel estimation, assisting signal demodulation, detection, etc. According to the function division, the reference signal includes the demodulation reference signal (DMRS), the channel state information reference signal (CSI-RS), the phase tracking reference signal (PTRS), the sounding reference signal (SRS), etc. Among them, the DMRS and CSI-RS are used to obtain channel information, and the PTRS is used to obtain phase change information.

[0091] In the embodiments of the present application, the application of the DMRS in the downlink transmission process is focused on. The downlink signal sent by the network device is affected by channel fading. The terminal needs to obtain the channel information through the DMRS to recover the channel, and then demodulate the downlink signal according to the channel information obtained by the DMRS.

[0092] It should be noted that the above downlink signal and the DMRS of the downlink signal need to pass through the same channel, so as to ensure that the channel parameters estimated by the terminal based on the DMRS are the channel parameters experienced by the downlink signal. Taking the downlink signal as the downlink data signal as an example, usually, the downlink data signal and the DMRS of the downlink data signal are transmitted on the same time-frequency resources. For example, the downlink data signal 1 and the DMRS of the downlink data signal 1 are transmitted on the same time slot and frequency resource block (RB) to ensure that the channels experienced by the above downlink data signal and the DMRS of the downlink data signal are the same.

[0093] In a possible implementation manner, the terminal can obtain the DMRS sent by the network device according to a predetermined rule, so that the terminal can recover the actual downlink signal sent by the network device according to the DMRS and the linear channel model. Among them, the linear channel model can satisfy the following formula 1:

[0094] y = Hx + n Formula 1

[0095] Where y is the downlink signal received by the terminal. H is the channel information estimated based on the DMRS sent by the network device. x is the downlink signal sent by the network device. n represents noise, which is a set known quantity. The terminal can recover the downlink signal x sent by the network device based on the channel information H. If the channel noise is ignored, then x = H^(-1)y.

[0096] 6. ZC sequence

[0097] The ZC sequence is a special sequence widely used in the communication field. Since the PAPR of the ZC sequence is relatively low, usually, the DMRS generation sequence of the DFT-s-OFDM waveform is the ZC sequence.

[0098] 7. Gray complementary sequence

[0099] The Gray complementary sequence refers to a sequence in which there is a complementary relationship between sequence pairs. Usually, when the DMRS occupies two symbols, the DMRS generation sequence is the Gray complementary sequence.

[0100] 8. Transmission resources

[0101] The transmission resources involved in the embodiments of this application include time domain resources and frequency domain resources.

[0102] Among them, the time-domain resource can refer to any one of the following: a time slot, or a bundle (bundle group) of multiple time slots. One time slot includes multiple consecutive orthogonal frequency division multiplexing (OFDM) symbols, and the number of symbols is related to the subcarrier spacing (SCS).

[0103] The frequency-domain resource can refer to any one of the following: an RB, or a group of RBs, or a precoding resource block group (PRG). Among them, an RB can also be referred to as a physical resource block (PRB), which is the basic unit of frequency resources in a communication system that supports CP-OFDM or DFT-s-OFDM. Generally, one RB consists of N resource elements (REs), and one RE can also be referred to as a subcarrier. N is generally 12. A PRG is the basic unit of frequency-domain resources for precoding by a communication device, and a PRG can include multiple RBs or resource element groups (REGs). In the embodiments of this application, all REGs involved can be replaced by RBs.

[0104] 9. Control Resource Set (CORESET) and Search Space

[0105] The transmission resources involved in the downlink transmission process can be divided into the transmission resources that can be occupied by the downlink control channel and the transmission resources that can be occupied by the downlink data channel. As Figure 2 shown in a schematic diagram of the structure of a transmission resource, the control area includes the time-domain and frequency-domain resources that can be occupied by the downlink control channel, and the data area includes the time-domain and frequency-domain resources that can be occupied by the downlink data channel. Taking the downlink control channel including the PDCCH and the downlink data channel including the PDSCH as an example: The communication device can determine the location where the PDCCH exists in the control area and determine the location where the PDSCH exists in the data area.

[0106] A CORESET refers to a block of time-frequency resources in the control area. One CORESET corresponds to a group of terminals. In Figure 2 it is also shown that the control area includes CORESET 1 and CORESET 2.

[0107] Exemplarily, if CORESET 1 corresponds to UE1, UE2, UE3, and UE4, and CORESET2 corresponds to UE4, UE5, UE6, and UE7. Then, the PDCCHs of UE1, UE2, UE3, and UE4 can be carried on CORESET 1, and the PDCCHs of UE4, UE5, UE6, and UE7 can be carried on CORESET 2.

[0108] In addition, a terminal can also correspond to multiple CORESETs, and the numerology on these CORESETs can be the same or different. The numerology here includes the subcarrier spacing (SCS) and the cyclic prefix (CP) length. For example, there is UE8 corresponding to CORESET 1 and CORESET 2, and the PDCCH of UE8 can be carried on CORESET 1 and / or CORESET 2.

[0109] Furthermore, for any one of a group of terminals corresponding to a CORESET, any one of the above terminals can have its corresponding search space on this CORESET, and the resources of this search space are less than or equal to the resources of this CORESET. That is to say, the search space refers to a part of the time-frequency resources within the CORESET. Taking the aforementioned UE1 as an example, specifically, the PDCCH of UE1 can be carried on the search space corresponding to UE1 on CORESET 1.

[0110] It should be noted that a CORESET can be bound to multiple search spaces, but a search space can only be bound to one CORESET.

[0111] In a possible implementation manner, taking the following downlink control channel as the PDCCH as an example: The CORESET can be used to indicate the symbol range and frequency range within the time slots where the PDCCH may exist, and the search space can be used to indicate the symbol positions and frequencies within the CORESET where the PDCCH may exist. Only after a CORESET and a search space are bound can the time-frequency resources of the PDCCH be determined. In addition, the resources that the PDCCH may occupy and the resources actually occupied by the PDCCH can both be described by control channel elements (CCEs). One CCE is composed of 6 resource element groups (REGs), and one REG corresponds to 1 resource block (RB) on one symbol, that is, one REG includes the resources corresponding to one symbol in the time domain and one RB in the frequency domain.

[0112] 10. Precoding Granularity

[0113] The precoding granularity refers to the number of RBs or the number of REGs included in a PRG. Among them, the precodings corresponding to different channels can be independent of each other, so that the communication device can independently demodulate the signals carried on different channels.

[0114] Taking the downlink control channel as the PDCCH as an example, the precoding granularity corresponding to the PDCCH can be any one of the following: full-band precoding, 1 CCE (i.e., 6 REGs), or 4 REGs, 2 REGs. Among them, full-band precoding refers to all the REGs configured by the communication device for the PDCCH.

[0115] Furthermore, the precoding granularities corresponding to multiple messages carried on the PDCCH can also be the same or different. For example, the system information block (SIB) 1, DMRS, paging message, message 2 in the random access process, and message 4 in the random access process carried on the PDCCH can correspond to the same precoding granularity or different precoding granularities. For example, the SIB1, DMRS, paging message, message 2 in the random access process, and message 4 in the random access process carried on the PDCCH all correspond to 6 REGs. Another example is that the SIB1 and DMRS carried on the PDCCH correspond to 6 REGs, while the paging message, message 2 in the random access process, and message 4 in the random access process carried on the PDCCH all correspond to 4 REGs.

[0116] In addition, the precoding granularities corresponding to the paging message, message 2 in the random access process, and message 4 in the random access process carried on the PDCCH can be configured through SIB1.

[0117] Taking the downlink data channel as the PDSCH as an example, usually, the default precoding granularity corresponding to the PDSCH is 2 REGs. That is to say, the SIB1, DMRS, paging message, message 2 in the random access process, and message 4 in the random access process carried on the PDSCH all correspond to 2 REGs.

[0118] 11. DMRS pattern

[0119] The DMRS pattern refers to the configuration method of the DMRS. Among them, the DMRSs corresponding to different channels can adopt different configuration methods.

[0120] Taking the downlink control channel as the PDCCH as an example, the first demodulation reference signal can be the DMRS of the signal carried on the PDCCH, or simply referred to as the PDCCH DMRS. As Figure 3Figure (a) in [ ] shows the distribution of PDCCH DMRS in a REG. It can be seen that the REG includes 12 REs, the density of PDCCH DMRS is fixed at 1 / 4, and it starts from the second RE of a REG.

[0121] Taking the following downlink control channel as PDSCH as an example, the second demodulation reference signal can be the DMRS of the signal carried on the PDSCH, or simply referred to as PDSCH DMRS. As Figure 3 Figure (b) in [ ] shows the distribution of PDSCH DMRS in an RB using configuration type 1. It can be seen that the RB includes 12 REs, the density of PDSCH DMRS is fixed at 1 / 2, and it starts from the first RE of a REG.

[0122] Another example is Figure 3 Figure (c) in [ ] shows the distribution of PDSCH DMRS in an RB using configuration type 2. It can be seen that the RB includes 12 REs, the density of PDSCH DMRS is fixed at 2 / 6 (i.e., 1 / 3), and it starts from the first two consecutive REs of a REG.

[0123] It should be noted that Figure 3 the PDCCH DMRS shown in Figure (a) in [ ], Figure 3 the PDSCH DMRS shown in Figure (b) in [ ], Figure 3 the PDSCH DMRS shown in Figure (c) in [ ] are mainly to distinguish that the configuration methods of PDCCH DMRS and PDSCH DMRS can be different. Although the same pattern is used to represent PDCCH DMRS and PDSCH DMRS in [ ], the above pattern is only an example and does not mean that the precoding of the three is the same. Figure 3 In addition, for SIB1, only configuration type 1 can be used to configure DMRS. For downlink messages other than SIB1 (such as physical broadcast channel (PBCH), paging messages, message 2, message 4, and other system messages, radio resource control (RRC) configuration messages, etc.), either configuration type 1 or configuration type 2 can be used to configure DMRS. And for downlink messages other than SIB1, the starting RE position of DMRS can also be configured more flexibly.

[0124] Of course, the above

[0125] Of course, the above Figure 3The three DMRS configuration methods shown are only for illustrative purposes, and there may be other DMRS configuration methods, which are not restricted in any way in the embodiments of this application.

[0126] 12. Resource position relationship between SIB1 and DMRS

[0127] SIB1 may include PDCCH for SIB1 and PDSCH for SIB1, and the above-mentioned PDCCH for SIB1 and PDSCH for SIB1 may perform data demodulation based on different types of DMRS. The above-mentioned PDCCH for SIB1, PDCCH DMRS, PDSCH for SIB1, and PDSCH DMRS may be carried in the same time slot, and the above-mentioned PDCCH for SIB1, PDCCH DMRS, PDSCH for SIB1, and PDSCH DMRS may also be carried in the same RB.

[0128] Furthermore, the above-mentioned PDCCH for SIB1 may be carried on 1 to 3 consecutive symbols in a time slot and on the entire RB. The above-mentioned PDCCH DMRS may be regularly carried on the time-frequency resources of the above-mentioned PDCCH for SIB1. The above-mentioned PDCCH for SIB1 may be carried on 6 to 8 consecutive symbols in a time slot and on the entire RB. The above-mentioned PDSCH DMRS may be carried on 1 symbol in a time slot and on a part of the REs of an RB.

[0129] Exemplarily, Figure 4 shows the configuration methods of multiple common signals (for example, the above-mentioned PDCCH for SIB1, PDCCH DMRS, PDSCH for SIB1, and PDSCH DMRS). As Figure 4 shown, PDCCH for SIB1 may be carried on the 1st and 2nd symbols in a time slot and on the entire RB. PDCCH DMRS may be carried on the 1st and 2nd symbols in a time slot and on the 2nd, 6th, and 10th REs in the RB, that is to say, the communication device may configure a PDCCH DMRS every 3 REs. PDSCH for SIB1 may be carried on the 4th to 9th symbols in a time slot and on the entire RB. PDSCH DMRS may be carried on the 3rd symbol in a time slot and on the 1st, 3rd, 5th, 7th, 9th, and 11th REs in the RB, that is to say, the communication device may configure a PDSCH DMRS every 1 RE.

[0130] It should be noted that the relationship of time-frequency resources among the above-mentioned PDCCH for SIB1, PDCCH DMRS, PDSCH for SIB1, and PDSCH DMRS is generally applied to the CP-OFDM scenario.

[0131] In addition, generally, the antenna port number corresponding to the PDCCH is different from the antenna port number corresponding to the PDSCH. For example, the antenna port number corresponding to the PDCCH is 2000, while the antenna port number corresponding to the PDSCH is 1000.

[0132] It should be noted that the time-frequency resources of PDCCH for SIB1 and PDCCH DMRS can be determined by the high 4 bits in the control resource set 0

[0133] (control resource set zero, CORESET 0), while the time-frequency resources of PDSCH for SIB1 and PDSCH DMRS can be determined by the time domain resource assignment information carried in DCI 1_0.

[0134] Among them, DCI 1_0 is the information obtained by parsing CORESET 0. The time domain resource assignment information may include parameter K_0, parameter S, and parameter L. Parameter K_0 can be used to indicate the time slot where the starting symbol of PDSCH for SIB1 is located and the time slot offset between the PDCCH (or CORESET 0) and the PDSCH. Parameter S can be used to indicate the starting symbol position of PDSCH for SIB1, and parameter L can be used to indicate the number of symbols included in PDSCH for SIB1.

[0135] Optionally, CORESET 0 can also indicate the time-frequency resource multiplexing method of the SSB and SIB1. Exemplarily, as Figure 5 shown, the time-frequency resource multiplexing method between public information (such as the SSB and SIB1) can include the following three methods: method (pattern) 1, pattern2, and pattern 3. Pattern 1 means that the SSB and SIB1 are in a time division multiplexing method, that is, the frequency domain resources of the SSB and SIB1 can overlap, while the time domain resources of the SSB and SIB1 are different. Pattern 2 and Pattern 3 mean that the SSB and SIB1 are in a frequency division multiplexing method, that is, the time domain resources of the SSB and SIB1 can overlap, while the frequency domain resources of the SSB and SIB1 are different.

[0136] Furthermore, as can be seen from the above introduction about "SIB1", SIB1 can include PDCCH for SIB1 and PDSCH for SIB1. In this way, the time-domain resources of SSB and PDSCH for SIB1 can be the same, while the frequency-domain resources of SSB and PDSCH for SIB1 are different (i.e., Pattern 2); the time-domain resources of SSB and the entire SIB1 (i.e., PDCCH for SIB1 and PDSCH for SIB1) can be the same, while the frequency-domain resources of SSB and the entire SIB1 are different (i.e., Pattern 3).

[0137] It should be noted that the relevant protocol stipulates that the above Pattern 1 is usually applied in the DFT-s-OFDM scenario to reduce the PAPR of the common signal, thereby improving the coverage ability of the common signal. Usually, the frequency requirements of the DFT-s-OFDM scenario can include frequency range (FR) 1 and / or FR2. The above Pattern 2 and Pattern 3 are usually applied in the CP-OFDM scenario or FR2 to improve resource utilization and reduce the resource overhead of the common signal. Usually, the frequency requirements of the CP-OFDM scenario can be FR2.

[0138] The above is a brief introduction to the relevant technical terms of this application.

[0139] In a wireless communication system, if a common signal (e.g., SIB1) and a data signal share a transmission channel and a beam, then as the frequency band increases and the scale of the antenna array increases, the data signal will exacerbate the impact on the common signal. In this way, compared with the coverage ability of the data signal, the coverage ability of the common signal is significantly lower. Exemplarily, Figure 6 a schematic diagram of the beam non-decoupling of the common signal and the data signal is given. Taking the common signal as SSB or SIB1 and the data signal as the signal carried on PDSCH as an example: As Figure 6 shown, the coverage distance of SSB or SIB1 is much smaller than the coverage distance of the signal carried on PDSCH, which reflects that compared with the coverage ability of the signal carried on PDSCH, the coverage ability of SSB or SIB1 is significantly lower. In view of this, in order to avoid the impact of the data signal on the common signal during signal transmission, the transmission channels and beams of the common signal and the data signal can be decoupled to improve the coverage ability of the common signal.

[0140] However, the current transmission waveform of the common signal is usually the CP-OFDM waveform. As can be seen from the above introduction about the "resource position relationship between SIB1 and DMRS", for the common signal with the CP-OFDM waveform, the demodulation reference signal of the common signal is carried on the time-frequency resources of the common signal. That is to say, the time-domain resources of the demodulation reference signal of the common signal overlap with the time-domain resources of the common signal, which will destroy the single-carrier characteristic of the common signal and result in a generally high PAPR of the common signal with the CP-OFDM waveform. And the PAPR also affects the coverage ability of the signal. Thus, even if the transmission channels of the common signal and the data signal are decoupled, the improvement of the coverage ability of the common signal is limited, and further the coverage ability of the common signal remains weak.

[0141] Based on this, the present application provides a signal transmission method. The terminal can receive a first common signal carried on a downlink control channel from a network device and a first demodulation reference signal for demodulating the first common signal. During the transmission of the first common signal and the first demodulation reference signal, the network device differentiates the time-domain resources of the first common signal and the time-domain resources of the first demodulation reference signal, so that the time-domain resources of the first common signal and the time-domain resources of the first demodulation reference signal are different. In this way, the influence of the first demodulation reference signal on the single-carrier characteristic of the first common signal is avoided, and the first common signal has the single-carrier characteristic. That is to say, the PAPR of the first common signal is relatively low, which effectively reduces the negative impact of the PAPR on the coverage ability of the common signal, and further effectively improves the coverage ability of the common signal.

[0142] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application.

[0143] To facilitate the understanding of the embodiments of the present application, the following points are explained before introducing the embodiments of the present application.

[0144] 1. In the embodiments of the present application, "indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. If the information indicated by a certain piece of information (such as the first piece of information below) is called the information to be indicated, then in the specific implementation process, there are many ways to indicate the information to be indicated. For example, but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the index of the information to be indicated, etc. It is also possible to indirectly indicate the information to be indicated by indicating other information, where there is an association relationship between the other information and the information to be indicated. It is also possible to only indicate a part of the information to be indicated, while the other parts of the information to be indicated are known or pre-agreed. For example, it is also possible to use the arrangement order of each piece of information pre-agreed (for example, stipulated by the protocol) to implement the indication of specific information, thereby reducing the indication overhead to a certain extent. At the same time, the common parts of each piece of information can be identified and indicated uniformly to reduce the indication overhead caused by separately indicating the same information.

[0145] In addition, the specific indication method can also be various existing indication methods, such as, for example, but not limited to, the above indication methods and their various combinations, etc. The specific details of various indication methods can refer to the prior art and will not be elaborated herein. As can be seen from the above, for example, when it is necessary to indicate multiple pieces of information of the same type, there may be a situation where the indication methods of different pieces of information are different. In the specific implementation process, the required indication method can be selected according to specific needs, and the embodiments of the present application do not limit the selected indication method. In this way, the indication methods involved in the embodiments of the present application should be understood to cover various methods that can enable the party to be indicated to obtain the information to be indicated.

[0146] It should be understood that the information to be indicated can be sent as a whole or divided into multiple sub-information and sent separately, and the sending periods and / or sending times of these sub-information can be the same or different. The specific sending method is not limited in the embodiments of the present application. Among them, the sending periods and / or sending times of these sub-information can be predefined, for example, predefined according to the protocol, or can be configured by the transmitting device by sending configuration information to the receiving device. Among them, the configuration information can, for example, but not limited to, include radio resource control signaling, such as a combination of one or at least two of radio resource control signaling, multiple access channel layer signaling, physical layer signaling, or downlink control information.

[0147] 2. "Pre - definition" or "pre - configuration" can be achieved by pre - saving corresponding codes, tables, or other means that can be used to indicate relevant information in a device (e.g., including a terminal and / or a network device). The embodiments of the present application do not limit the specific implementation manner thereof. Among them, "saving" can refer to saving in one or more memories. One or more memories can be separately provided, or can be integrated in an encoder or a decoder, a processor, or a communication device. One or more memories can also be partially separately provided and partially integrated in a decoder, a processor, or a communication device. The type of the memory can be any form of storage medium, and the embodiments of the present application do not limit this.

[0148] It should be noted that in the following embodiments of the present application, the message names between each network element, the names of each parameter, or the names of each piece of information, etc. are just examples, and in other embodiments, they can also be other names. The method provided by the embodiments of the present application does not make specific limitations on this.

[0149] It can be understood that in the embodiments of the present application, each network element can execute some or all of the steps in the embodiments of the present application. These steps or operations are only examples, and the embodiments of the present application can also execute other operations or various deformations of the operations. In addition, each step can be executed in a different order presented in the embodiments of the present application, and it is possible not to execute all the operations in the embodiments of the present application.

[0150] Figure 7 This is an example of the signal transmission method provided by the embodiments of the present application. This method is described by taking the interaction between a network device and a terminal as an example. Of course, the entity that executes the actions of the network device in this method can also be a device / module in the network device, such as a chip, a processor, a processing unit, etc. in the network device. The entity that executes the actions of the terminal in this method can also be a device / module in the terminal, such as a chip, a processor, a processing unit, etc. in the terminal. The embodiments of the present application do not make specific limitations on this. Exemplarily, as Figure 7 shown, the signal transmission method includes the following steps:

[0151] S701. The network device sends a first common signal and a first demodulation reference signal to the terminal. Correspondingly, the terminal receives the first common signal and the first demodulation reference signal from the network device.

[0152] Among them, the first common signal is carried on a downlink control channel. The first demodulation reference signal is used to demodulate the first common signal. The time - domain resources of the first common signal and the time - domain resources of the first demodulation reference signal are different.

[0153] In one example, the first common signal may be SIB1, and the first demodulation reference signal may be DMRS. Of course, the above is only an exemplary description of the first common signal and the first demodulation reference signal. The first common signal may also be other common signals, for example, PBCH, and the first demodulation reference signal may also be other demodulation reference signals, for example, CSI-RS. The embodiments of the present application do not impose any restrictions on this.

[0154] The present application provides a signal transmission method. A terminal may receive a first common signal carried on a downlink control channel from a network device, and a first demodulation reference signal for demodulating the first common signal. During the transmission of the first common signal and the first demodulation reference signal, the network device differentiates the time-domain resources of the first common signal and the time-domain resources of the first demodulation reference signal, so that the time-domain resources of the first common signal and the time-domain resources of the first demodulation reference signal are different, thus avoiding the first demodulation reference signal from affecting the single-carrier characteristic of the first common signal, enabling the first common signal to have the single-carrier characteristic, that is, enabling the first common signal to have a lower PAPR, effectively reducing the negative impact of PAPR on the coverage ability of the common signal, and thereby effectively improving the coverage ability of the common signal.

[0155] The time-domain resources of the first common signal and the time-domain resources of the first demodulation reference signal are described below.

[0156] Exemplarily, the number of symbols included in the time-domain resources of the first demodulation reference signal may be greater than or equal to 1, and the starting symbol of the first demodulation reference signal may be the starting symbol in a time slot. The number of symbols included in the time-domain resources of the first common signal may be greater than or equal to 1, and the starting symbol of the first common signal may be any symbol after the symbol of the first demodulation reference signal.

[0157] Of course, the above is only an exemplary description of the number of symbols included in the time-domain resources of the first demodulation reference signal, the starting symbol of the first demodulation reference signal, the number of symbols included in the time-domain resources of the first common signal, and the starting symbol of the first common signal. There may also be other examples. For example, the number of symbols included in the time-domain resources of the first demodulation reference signal may be greater than or equal to 2, and the starting symbol of the first demodulation reference signal may be a non-starting symbol in a time slot, such as the 2nd symbol in a time slot. The number of symbols included in the time-domain resources of the first common signal may be greater than or equal to 2, and the starting symbol of the first common signal may be any symbol after the symbol of the first demodulation reference signal. The embodiments of the present application do not impose any restrictions on this.

[0158] The frequency-domain resources of the first common signal and the frequency-domain resources of the first demodulation reference signal are described below.

[0159] In a possible implementation, the frequency-domain resources of the first common signal and the frequency-domain resources of the first demodulation reference signal may overlap. That is to say, all or part of the frequency-domain resources carrying the first demodulation reference signal may also carry the first common signal.

[0160] In another possible implementation, the frequency-domain resources of the first common signal and the frequency-domain resources of the first demodulation reference signal may not overlap, but both the frequency-domain resources of the first common signal and the frequency-domain resources of the first demodulation reference signal are within a preconfigured frequency-domain range. For example, the frequency-domain resources of the first common signal are within the range of RB1 to RB3, and the frequency-domain resources of the first demodulation reference signal are also within the range of RB1 to RB3. However, the frequency-domain resources of the first common signal are RB1, and the frequency-domain resources of the first demodulation reference signal are RB3. Among them, the preconfigured frequency-domain range can be determined by the network device based on the actual situation.

[0161] Exemplarily, the frequency-domain density of the first common signal may be 12 RE / RB. That is to say, the first common signal can occupy 12 REs in 1 RB. The frequency-domain density of the first demodulation reference signal may be 4 RE / RB or 6 RE / RB. That is to say, the first common signal can occupy 4 REs or 6 REs in 1 RB, and the starting RE of the first demodulation reference signal may be the first RE in the RB.

[0162] Of course, the above is only an exemplary description of the frequency-domain density of the first common signal, the frequency-domain density of the first demodulation reference signal, and the starting RE of the first demodulation reference signal. There may be other examples. For example, the frequency-domain density of the first common signal may be 14 RE / RB, the frequency-domain density of the first demodulation reference signal may be 8 RE / RB, and the starting RE of the first demodulation reference signal may be the second RE in the RB. The embodiments of the present application do not make any restrictions on this.

[0163] The following gives 8 examples of configuring the time-frequency resources of the first common signal and the time-frequency resources of the first demodulation reference signal.

[0164] Figure 8 Four example diagrams of configuring the time-frequency resources of the first common signal and the time-frequency resources of the first demodulation reference signal are given. Assume that the number of symbols included in the time-domain resources of the first demodulation reference signal is 1, the symbol of the first demodulation reference signal may be the starting symbol in a time slot, the number of symbols included in the time-domain resources of the first common signal is 2, the starting symbol of the first common signal is the first symbol after the symbol of the first demodulation reference signal, the frequency-domain resources of the first common signal and the frequency-domain resources of the first demodulation reference signal may overlap, and the starting RE of the first demodulation reference signal may be the first RE in the RB:

[0165] Such asFigure 8 As shown in (a) and (b), for time-domain resources, the time-domain resources of the first demodulation reference signal can be the first symbol (i.e., symbol 0) of a time slot, and the time-domain resources of the first common signal can be the second to third symbols (i.e., symbols 1 to 2) of a time slot. For frequency-domain resources, the frequency-domain resources of the first common signal can be the entire RB, and there can be multiple configuration methods for the frequency-domain resources of the first demodulation reference signal, as long as it includes at least one RE of the RB, so that the frequency-domain resources of the first demodulation signal and the frequency-domain resources of the first common signal overlap. Figure 8 (a) and (b) in show two configuration methods for the frequency-domain resources of the first demodulation reference signal. As Figure 8 shown in (a) of, the frequency-domain resources of the first demodulation reference signal can include the 1st, 3rd, 5th, 7th, 9th, and 11th REs in the RB (i.e., RE0, RE2, RE4, RE6, RE8, RE10). That is to say, the network device can configure the first demodulation reference signal based on the method of configuring a first demodulation reference signal every other 1 RE. In this case, the frequency-domain density of the first demodulation reference signal is 6 RE / RB. As Figure 8 shown in (b) of, the frequency-domain resources of the first demodulation reference signal can include the 1st, 2nd, 7th, and 8th REs in the RB (i.e., RE0, RE1, RE6, RE7). That is to say, the network device can configure the first demodulation reference signal based on the method of configuring two first demodulation reference signals every other 4 REs. In this case, the frequency-domain density of the first demodulation reference signal is 4 RE / RB.

[0166] Assume that the number of symbols included in the time-domain resources of the first demodulation reference signal is 1, the symbol of the first demodulation reference signal can be the starting symbol in a time slot, the number of symbols included in the time-domain resources of the first common signal is 2, the starting symbol of the first common signal is the first symbol after the symbol of the first demodulation reference signal, the frequency-domain resources of the first common signal and the frequency-domain resources of the first demodulation reference signal can overlap, and the starting RE of the first demodulation reference signal can be the 2nd RE in the RB:

[0167] As Figure 8As shown in (c), for time-domain resources, the time-domain resources of the first demodulation reference signal can be the first symbol (i.e., symbol 0) of a time slot, and the time-domain resources of the first common signal can be the second to third symbols (i.e., symbols 1 to 2) of a time slot. For frequency-domain resources, the frequency-domain resources of the first common signal can be the entire resource block (RB), and the frequency-domain resources of the first demodulation reference signal can include the second, fourth, sixth, eighth, tenth, and twelfth resource elements (REs) in the RB (i.e., RE1, RE3, RE5, RE7, RE9, RE11). That is to say, the network device can configure the first demodulation reference signal in a way that one first demodulation reference signal is configured for every other RE. In this case, the frequency-domain density of the first demodulation reference signal is 6 RE / RB.

[0168] Assume that the number of symbols included in the time-domain resources of the first demodulation reference signal is 1, the symbol of the first demodulation reference signal can be the starting symbol in a time slot, the number of symbols included in the time-domain resources of the first common signal is 2, the starting symbol of the first common signal is the first symbol after the symbol of the first demodulation reference signal, the frequency-domain resources of the first common signal and the frequency-domain resources of the first demodulation reference signal can overlap, and the starting RE of the first demodulation reference signal can be the third RE in the RB:

[0169] As Figure 8 As shown in (d), for time-domain resources, the time-domain resources of the first demodulation reference signal can be the first symbol (i.e., symbol 0) of a time slot, and the time-domain resources of the first common signal can be the second to third symbols (i.e., symbols 1 to 2) of a time slot. For frequency-domain resources, the frequency-domain resources of the first common signal can be the entire resource block (RB), and the frequency-domain resources of the first demodulation reference signal can include the third, fourth, ninth, and tenth resource elements (REs) in the RB (i.e., RE2, RE3, RE8, RE9). That is to say, the network device can configure the first demodulation reference signal in a way that two first demodulation reference signals are configured for every four REs. In this case, the frequency-domain density of the first demodulation reference signal is 4 RE / RB.

[0170] Figure 9 Four other example diagrams showing the configuration of the time-frequency resources of the first common signal and the time-frequency resources of the first demodulation reference signal are given. Figure 9 The configuration manner of the first common signal and the first demodulation reference signal shown Figure 8 compared with the configuration manner of the first common signal and the first demodulation reference signal shown Figure 9 The number of symbols included in the time-domain resources of the first demodulation reference signal in Figure 9 For the description of the configuration manner of the first common signal and the first demodulation reference signal shown Figure 8 reference can be made to the relevant description of

[0171] It should be understood that Figure 8 and Figure 9 the eight examples shown are only exemplary illustrations of configuring the time-frequency resources of the first common signal and the time-frequency resources of the first demodulation reference signal. There may be other configuration methods for the time-frequency resources of the first common signal and the time-frequency resources of the first demodulation reference signal, and the embodiments of the present application do not impose any restrictions on this.

[0172] The above is mainly a detailed description of the transmission resources. However, for the common signal and the demodulation reference signal, the same transmission method for the above two is the basic condition to ensure that the demodulation reference signal can demodulate the common signal. The above common signal may include the first common signal and / or the second common signal involved in the present application, and the above demodulation reference signal may include the first demodulation reference signal and / or the second demodulation reference signal involved in the present application.

[0173] The transmission methods of at least two of the first common signal, the first demodulation reference signal, the second common signal, and the second demodulation reference signal will be described below.

[0174] Optionally, the same transmission method for the first common signal and the first demodulation reference signal can enable the first demodulation reference signal to be used to demodulate the first common signal. Further, optionally, the same transmission method may include at least one of the following: the same channel parameters, the same antenna port number, the same precoding, or the same precoding granularity. For example, the channel parameters of the first common signal and the first demodulation reference signal may both be target channel parameters; for another example, the antenna port numbers of the first common signal and the first demodulation reference signal may both be 2000; for another example, the precodings of the first common signal and the first demodulation reference signal may both be target precodings; for another example, the precoding granularities of the first common signal and the first demodulation reference signal may both be full-band precoding granularities.

[0175] However, in the CP-OFDM scenario, the precoding granularity may be one of the following: 2, or 4, or the full-band precoding granularity N C RB ORESET ; in the DFT-s-OFDM scenario, the precoding granularity is the full-band precoding granularity N C RB ORESET . Figure 10 For the schematic diagram of the full-band precoding granularity, as Figure 10 shown, the network device precodes the first common signal and the first demodulation reference signal with the frequency-domain resources from REG0 to REGN C RB ORESET -1 as the granularity, that is, with N C RB ORESETA frequency-domain resource performs precoding for the overall first common signal and the first demodulation reference signal.

[0176] It can be understood that the network device can directly or indirectly reflect whether the channels experienced by the two signals are the same through channel parameters, precoding, antenna port numbers, and precoding granularity, simplifying the system design and improving the flexibility of reflecting whether the transmission modes are the same. Additionally, in the DFT-s-OFDM scenario, the precoding granularity not only needs to be the same but also needs to be the full-band precoding granularity to avoid destroying the single-carrier characteristics of the signal.

[0177] Of course, the above is only an exemplary description of the same transmission mode. There may be other ways for the same transmission mode, and the embodiments of this application do not impose any restrictions on this.

[0178] As can be seen from the foregoing introduction about "the transmission mode of the first common signal and the transmission mode of the first demodulation reference signal", the transmission modes of the first common signal and the first demodulation reference signal carried on the downlink control channel can be the same. However, for the downlink data channel, the transmission mode of the second common signal carried on the downlink data channel can also be the same as the transmission mode of the second demodulation reference signal carried on the downlink data channel, so that the second demodulation reference signal can be used to demodulate the second common signal.

[0179] It should be noted that the transmission mode of the second common signal and the transmission mode of the second demodulation reference signal can be determined by the information in the first common signal. Taking the first common signal as PDCCH for SIB1 and the second common signal as PDSCH for SIB1 as an example: The DCI_0 in PDCCH for SIB1 includes a PDSCH time resource assignment domain, and the time resource assignment domain can be used to indicate the transmission mode of the second common signal and the transmission mode of the second demodulation reference signal.

[0180] In addition, as can be seen from the foregoing introduction to the "downlink control channel", the downlink control channel is used to schedule the downlink data channel. For example, the PDCCH is used to transmit the scheduling and configuration information related to the PDSCH, and the DCI is carried in the PDCCH. The DCI is used to indicate the configuration information of the PDSCH (for example, time / frequency position, modulation information, etc.). In view of this, it can be known that the configuration information of the second common signal can be carried in the first common signal. Taking the first common signal as the PDCCH for SIB1, the second common signal as the PDSCH for SIB1, and the second demodulation reference signal as the PDSCH DMRS as an example: at least one of the following information in the time resource allocation domain and the DMRS-Type (type) A-Position (position) field in the above MIB can indicate the configuration information of the PDSCH: the type of PDSCH for SIB1 (Type A or Type B), symbol position, symbol length, the slot offset K_0 between the start slot of PDSCH for SIB1 and the start slot of PDCCH for SIB1, or RB position. In this case, the network device sends the second common signal and the second demodulation reference signal to the terminal based on the above configuration information of the PDSCH. Correspondingly, the terminal can receive the second common signal and the second demodulation reference signal from the network device based on the above configuration information of the PDSCH, and demodulate the second common signal based on the second demodulation reference signal.

[0181] Further, when the transmission mode of the first common signal is the same as that of the first demodulation reference signal, and the transmission mode of the second common signal is the same as that of the second demodulation reference signal, in order to enable the demodulation reference signals carried on different channels to be multiplexed, a first condition can be set. Under the first condition, the first demodulation reference signal carried on the downlink control channel can also be used to demodulate the second common signal carried on the downlink data channel to achieve the multiplexing of the first demodulation reference signal.

[0182] Among them, the first condition includes at least one of the following: the transmission modes of the first common signal and the second common signal are the same; the transmission modes of the first common signal and the second demodulation reference signal are the same; the transmission modes of the second common signal and the first demodulation reference signal are the same; or, the transmission modes of the first demodulation reference signal and the second demodulation reference signal are the same. That is to say, the first condition can be understood as that the transmission modes of any two or more of the first common signal, the second common signal, the first demodulation reference signal, and the second demodulation reference signal are the same.

[0183] In some examples, the multiplexing mode of the first demodulation reference signal may include any one of the following: The network device may configure that all first demodulation references are used for demodulating the second common signal, or the network device may configure any part of the first demodulation references to be used for demodulating the second common signal, or the network device may configure a part of the first demodulation references adjacent to the second common signal to be used for demodulating the second common signal. Of course, the above is only an exemplary description of the multiplexing mode of the first demodulation reference signal. The multiplexing mode of the first demodulation reference signal may also include other multiplexing modes, and the embodiments of the present application do not impose any restrictions thereon.

[0184] It can be understood that the network device sets the transmission modes of the first common signal or the first demodulation reference signal related to the downlink control channel to be the same as those of the second common signal or the second demodulation reference signal related to the downlink data channel, so that the first demodulation reference signal related to the downlink control channel can be used to demodulate the second common signal related to the downlink data channel, thereby realizing the multiplexing of demodulation reference signals. The multiplexing of demodulation reference signals can improve the accuracy of channel estimation or reduce signaling overhead.

[0185] Of course, the above is only an exemplary description of the multiplexing of demodulation reference signals. The multiplexing of demodulation reference signals may also include other multiplexing modes. For example, the second reference demodulation signal may also be used to demodulate the first common signal, and the embodiments of the present application do not impose any restrictions thereon.

[0186] The multiplexing mode of the first demodulation reference signal is described below under the first condition.

[0187] Optionally, when the positional relationship between the time-frequency resources of the first demodulation reference signal and the time-frequency resources of the second demodulation reference signal is different, the multiplexing mode of the first demodulation reference signal is also different. The relationship between the time-frequency resources of the first demodulation reference signal and the time-frequency resources of the second demodulation reference signal can be divided into the following two cases: Case 1 is that the time-domain resources of the first demodulation reference signal and the time-domain resources of the second demodulation reference signal are different; Case 2 is that the time-domain resources of the first demodulation reference signal and the time-domain resources of the second demodulation reference signal are the same.

[0188] Case 1 is that the time-domain resources of the first demodulation reference signal and the time-domain resources of the second demodulation reference signal are different. In the above Case 1, the first demodulation reference signal and the second demodulation reference signal are used to jointly demodulate the second common signal, which can improve the accuracy of channel estimation and thus improve the accuracy of demodulating the second common signal. In addition, the first demodulation reference signal can also be combined with the second demodulation reference signal and can also be used to jointly demodulate the first common signal.

[0189] Optionally, in Case 1, the relationship between the frequency-domain resources of the first demodulation reference signal and the frequency-domain resources of the second demodulation reference signal may include the following two possible implementation manners: One possible implementation manner is that the frequency-domain resources of the first demodulation reference signal and the frequency-domain resources of the second demodulation reference signal may overlap, that is, all or part of the frequency-domain resources carried by the first demodulation reference signal may also carry the second demodulation reference signal. Another possible implementation manner is that the frequency-domain resources of the first demodulation reference signal and the frequency-domain resources of the second demodulation reference signal may not overlap, but the frequency-domain resources of the first demodulation reference signal and the frequency-domain resources of the second demodulation reference signal are both within the preconfigured frequency-domain range.

[0190] Exemplarily, in Case 1, Figure 11 a schematic diagram of configuring the time-frequency resources of the first common signal, the time-frequency resources of the second common signal, the frequency-domain resources of the first demodulation reference signal, and the frequency-domain resources of the second demodulation reference signal is given. Assume that the frequency-domain resources of the first demodulation reference signal and the frequency-domain resources of the second demodulation reference signal may overlap, and the precoding granularity is the full-band precoding granularity: Regarding Figure 11 other assumed conditions involved, reference can be made to Figure 8 the assumed conditions for understanding, which will not be elaborated here.

[0191] As Figure 11 shown, for the time-domain resources of each REG among N R C B ORESET REGs, the time-domain resources of the first demodulation reference signal may be the first symbol (i.e., symbol 0) of the time slot, the time-domain resources of the first common signal may be the second to third symbols (i.e., symbols 1 to 2) of the time slot, the time-domain resources of the second demodulation reference signal may be the fourth symbol (i.e., symbol 3) of the time slot, and the time-domain resources of the second common signal may be the fifth to ninth symbols (i.e., symbols 4 to 8) of the time slot. For N C RB ORESETFor the frequency-domain resources of each REG among the [[REG number]], the frequency-domain resources of the first common signal can be the entire RB, the frequency-domain resources of the first demodulation reference signal can include the 1st, 3rd, 5th, 7th, 9th, and 11th REs in the RB (i.e., RE0, RE2, RE4, RE6, RE8, RE10), the frequency-domain resources of the second common signal can be the entire RB, and the frequency-domain resources of the second demodulation reference signal can include the 1st, 3rd, 5th, 7th, 9th, and 11th REs in the RB (i.e., RE0, RE2, RE4, RE6, RE8, RE10). In this case, the frequency-domain density of the first common signal and the second common signal is both 12 RE / RB, and the frequency-domain density of the first demodulation reference signal and the second demodulation reference signal is both 6 RE / RB.

[0192] Exemplarily, in Case 1, Figure 12 An example diagram showing another configuration of the time-frequency resources of the first common signal, the time-frequency resources of the second common signal, the frequency-domain resources of the first demodulation reference signal, and the frequency-domain resources of the second demodulation reference signal is given. Assume that the frequency-domain resources of the first demodulation reference signal and the second demodulation reference signal may not overlap, but the frequency-domain resources of the first demodulation reference signal and the second demodulation reference signal are both within the preconfigured frequency-domain range, and the precoding granularity is the full-band precoding granularity: Regarding Figure 12 Other assumed conditions involved can be understood with reference to Figure 8 the assumed conditions, which will not be elaborated here.

[0193] As Figure 12 shown, for the time-domain resources of each REG among N R C B ORESET REGs, the time-domain resources of the first demodulation reference signal can be the 1st symbol of the time slot (i.e., symbol 0), the time-domain resources of the first common signal can be the 2nd to 3rd symbols of the time slot (i.e., symbols 1 to 2), the time-domain resources of the second demodulation reference signal can be the 4th symbol of the time slot (i.e., symbol 3), and the time-domain resources of the second common signal can be the 5th to 9th symbols of the time slot (i.e., symbols 4 to 8). For N C RB ORESETFor the frequency-domain resources of each REG among N REGs, the frequency-domain resources of the first common signal can be the entire RB. The frequency-domain resources of the first demodulation reference signal can include the 1st, 3rd, 5th, 7th, 9th, and 11th REs in the RB (i.e., RE0, RE2, RE4, RE6, RE8, RE10). The frequency-domain resources of the second common signal can be the entire RB. The frequency-domain resources of the second demodulation reference signal can include the 2nd, 4th, 6th, 8th, and 12th REs in the RB (i.e., RE1, RE3, RE5, RE7, RE9, RE11). In this case, the frequency-domain density of the first common signal and the second common signal is both 12 RE / RB, and the frequency-domain density of the first demodulation reference signal and the second demodulation reference signal is both 6 RE / RB.

[0194] Case 2 is that the time-domain resources of the first demodulation reference signal and the second demodulation reference signal are the same. In the above Case 2, the first demodulation reference signal and the second demodulation reference signal are both the third demodulation reference signal, and the third demodulation reference signal is used to demodulate the first common signal and the second common signal. In this way, the network device can transmit the third demodulation reference signal to demodulate the first common signal and the second common signal, thereby reducing the signaling overhead.

[0195] Optionally, the above third demodulation reference signal can be sent by the network device to the terminal before the network device sends the first common signal to the terminal, or can be sent by the network device to the terminal at the same time when the network device sends the first common signal to the terminal. Of course, the above is only an exemplary description of the network device sending the third demodulation reference signal to the terminal. The network device can also send the third demodulation reference signal at other times, and the embodiments of the present application do not make any restrictions on this.

[0196] Exemplarily, in Case 2, Figure 13 a schematic diagram of configuring the time-frequency resources of the first common signal, the time-frequency resources of the second common signal, and the time-frequency resources of the third demodulation reference signal is given. Assume that the precoding granularity is the full-band precoding granularity: Figure 13 Other assumed conditions involved can also refer to Figure 8 the assumed conditions for setting:

[0197] As Figure 13 shown, for the time-domain resources of each REG among N R C B ORESET REGs, the time-domain resources of the third demodulation reference signal can be the 1st symbol of the time slot (i.e., symbol 0), the time-domain resources of the first common signal can be the 2nd to 3rd symbols of the time slot (i.e., symbols 1 to 2), and the time-domain resources of the second common signal can be the 4th to 8th symbols of the time slot (i.e., symbols 3 to 7). For N CRB ORESET For the frequency-domain resources of each REG in the REGs, the frequency-domain resources of the first common signal can be the entire RB, the frequency-domain resources of the third demodulation reference signal can include the 1st, 3rd, 5th, 7th, 9th, and 11th REs in the RB (i.e., RE0, RE2, RE4, RE6, RE8, RE10), and the frequency-domain resources of the second common signal can be the entire RB. In this case, the frequency-domain density of the first common signal and the frequency-domain density of the second common signal are both 12 RE / RB, and the frequency-domain density of the third demodulation reference signal is 6 RE / RB.

[0198] It should be noted that in the case where the first demodulation reference signal can be multiplexed, the embodiments of the present application do not impose any restrictions on the number of symbols of the first demodulation reference signal. Figures 11 to 13 The examples described are illustrated by taking the number of symbols of the first demodulation reference signal as 1. In the case where the number of symbols of the first demodulation reference signal is greater than 1, the multiplexing method of the first demodulation reference signal can be understood with reference to the above, and will not be elaborated here.

[0199] In a possible implementation manner, before S701, the network device may pre-inform the terminal of the configuration parameters of the transmission resources of the first common signal and the first demodulation reference signal, so that the terminal can receive the first common signal and the first demodulation reference signal from the network device based on the above configuration parameters of the transmission resources. In view of this, as Figure 7 shown, the signal transmission method described in the embodiments of the present application may further include the following S700.

[0200] S700: The network device sends the first information to the terminal, and correspondingly, the terminal receives the first information from the network device.

[0201] Wherein, the first information is used to indicate at least one of the following: the time-domain resources of the first common signal, the frequency-domain resources of the first common signal, the time-domain resources of the first demodulation reference signal, or the frequency-domain resources of the first demodulation reference signal.

[0202] In a possible implementation manner, the network device may also indirectly determine at least one of the time-domain resources of the first common signal, the frequency-domain resources of the first common signal, the time-domain resources of the first demodulation reference signal, or the frequency-domain resources of the first demodulation reference signal through other information (such as transmission waveform, signal sequence, etc.). Among them, the above other information has a corresponding relationship with at least one of the time-domain resources of the first common signal, the frequency-domain resources of the first common signal, the time-domain resources of the first demodulation reference signal, or the frequency-domain resources of the first demodulation reference signal.

[0203] In another possible implementation, the terminal can also obtain at least one of the time-domain resource of the first common signal, the frequency-domain resource of the first common signal, the time-domain resource of the first demodulation reference signal, or the frequency-domain resource of the first demodulation reference signal based on protocol specifications.

[0204] It should be noted that if the first information is used to indicate the time-domain resource of the first common signal, the frequency-domain resource of the first common signal, the time-domain resource of the first demodulation reference signal, and the frequency-domain resource of the first demodulation reference signal, the terminal can directly receive the first common signal and the first demodulation reference signal from the network device according to the time-frequency resources indicated by the first information.

[0205] If the first information does not completely indicate the time-frequency resources of the first common signal and the time-frequency resources of the first demodulation reference signal. For example, if the first information only indicates the time-domain resource of the first common signal, the terminal can receive the first common signal and the first demodulation reference signal from the network device based on the time-domain resource of the first common signal indicated by the first information, and the frequency-domain resource of the first common signal, the time-domain resource of the first demodulation reference signal, and the frequency-domain resource of the first demodulation reference signal specified by the protocol.

[0206] Of course, the above is only one case where the first information does not completely indicate the time-frequency resources of the first common signal and the time-frequency resources of the first demodulation reference signal. In other cases where the first information does not completely indicate the time-frequency resources of the first common signal and the time-frequency resources of the first demodulation reference signal, the implementation process for the terminal to obtain the first common signal and the first demodulation reference signal can be understood by referring to the description in the corresponding position above, and will not be elaborated here.

[0207] It can be understood that the network device can send the first information to the terminal to inform at least one of the time-domain resource of the first common signal, the frequency-domain resource of the first common signal, the time-domain resource of the first demodulation reference signal, or the frequency-domain resource of the first demodulation reference signal, so that the terminal can obtain the first common signal and / or the first demodulation reference signal based on the first information.

[0208] Optionally, the first information can be carried in a third common signal, and the third common signal is carried in a broadcast channel. In this case, the network device can distinguish the time-domain resource of the first common signal from the time-domain resource of the third common signal, so that the time-frequency resources of the first common signal are different from the time-domain resource of the third common signal, thus avoiding the overlap between the time-domain resource of the first common signal and the time-domain resource of the third common signal, and further ensuring the single-carrier characteristic of the first common signal. That is to say, it further ensures that the PAPR of the first common signal is within a lower range, effectively reducing the negative impact of the PAPR on the coverage ability of the common signal, and thus effectively improving the coverage ability of the common signal.

[0209] Further, by way of example, taking the third common signal as SSB, the first common signal as SIB1, and the downlink control channel as PDCCH as an example: The first information may be the upper 4 bits (i.e., CORESET 0) in the configuration information of PDCCH for SIB1 in the MIB, where the MIB is the message block in the PBCH in the SSB. Specifically, the time domain resource of the first common signal and the frequency domain resource of the first common signal in the first information may be indicated by at least one of the following in CORESET 0: the number of RBs (i.e., the length of the frequency domain resource), the number of symbols (i.e., the length of the time domain resource), the RB offset (i.e., the offset of the starting position of the frequency domain resource of PDCCH for SIB1 compared to the starting position of the frequency domain resource of the SSB), and the starting symbol position. The time domain resource of the first demodulation reference signal and the frequency domain resource of the first demodulation reference signal in the first information may be indicated by at least one of the following in CORESET 0: the number of symbols (i.e., the length of the time domain resource), the frequency domain density, the starting symbol position, or the starting RE position.

[0210] In addition, the relationship between the time domain resources of the first common signal and the third common signal may also be indicated by the multiplexing mode of the SSB and PDCCH for SIB1 in the above CORESET 0. For example, the multiplexing mode of the SSB and PDCCH for SIB1 is a time division multiplexing mode.

[0211] Of course, the above is only an exemplary description of CORESET 0. CORESET 0 may also include other information, such as DMRS generation sequences, antenna port numbers, etc. The embodiments of the present application do not impose any restrictions on this.

[0212] As can be seen from the foregoing related introduction about "SIB1", SIB1 may include PDCCH for SIB1 and PDSCH for SIB1. In view of this, generally, both the downlink control channel and the downlink data channel may be used to carry common signals. To improve the processing efficiency of the terminal and reduce signaling overhead, the transmission waveforms of the common signals carried on different channels may be kept consistent. That is to say, the transmission waveform of the first common signal (i.e., the common signal carried on the downlink control channel) and the transmission waveform of the second common signal (i.e., the common signal carried on the downlink data channel) may be the same. This can reduce the complexity of the terminal in processing common signals, thereby improving the processing efficiency of the terminal and reducing signaling overhead.

[0213] However, there can also be multiple implementation manners for the terminal to determine whether the transmission waveforms of the first common signal and the second common signal are the same. A possible implementation manner means that the terminal can directly determine whether the transmission waveform of the first common signal is the same as that of the second common signal through the transmission waveforms of the first common signal and the second common signal.

[0214] In another possible implementation manner, the terminal can indirectly determine whether the transmission waveform of the first common signal is the same as that of the second common signal through the modulation manners of the first common signal and the second common signal. For example, the same modulation manners of the first common signal and the second common signal can be understood as the same transmission waveforms of the first common signal and the second common signal.

[0215] It can be understood that since there is a corresponding relationship between the transmission waveform and the modulation manner, the terminal can indirectly indicate the relationship between the transmission waveforms of the first common signal and the second common signal through the relationship between the modulation manners of the first common signal and the second common signal, that is, the same modulation manners of the first common signal and the second common signal can be understood as the same transmission waveforms of the first common signal and the second common signal. In this way, the processing efficiency of the terminal can also be improved and the signaling overhead can be reduced.

[0216] Optionally, the transmission waveform is a DFT-s-OFDM waveform. Additionally optionally, the transmission waveform is a CP-OFDM waveform. Of course, the above are only exemplary descriptions of the transmission waveform, and the transmission waveform can also be other waveforms, and the embodiments of the present application do not make any restrictions on this.

[0217] Further optionally, taking the first common signal as PDCCH for SIB1 as an example: The network device can determine the transmission waveform of the first common signal through the state of the transmission precoding (transform precoding) switch corresponding to PDCCH for SIB1. For example, when the transform precoding switch corresponding to PDCCH for SIB1 is in the on state, the network device can determine that the transmission waveform of the first common signal is a DFT-s-OFDM waveform; when the transform precoding switch corresponding to PDCCH for SIB1 is in the off state, the network device can determine that the transmission waveform of the first common signal is a CP-OFDM waveform.

[0218] It should be noted that since this application can be applied to scenarios of transmission waveform switching, for example, the transmission waveform switches from the CP-OFDM waveform to the DFT-s-OFDM waveform, the terminal needs to know the transmission waveform of the first common signal. In view of this, the network device can inform the terminal of the transmission waveform of the first common signal to avoid the situation of chaotic transmission waveforms. Among them, the implementation methods for the network device to inform the terminal of the transmission waveform of the first common signal can be divided into Implementation Method 1 and Implementation Method 2: Implementation Method 1 is explicit indication, that is to say, in this implementation method, the network device can directly inform the terminal of the transmission waveform of the first common signal; Implementation Method 2 is implicit indication, that is to say, in this implementation method, the network device can indirectly inform the terminal of the transmission waveform of the first common signal.

[0219] Implementation Method 1: The network device directly informs the terminal of the transmission waveform of the first common signal. In the above Implementation Method 1, the first information is also used to indicate the transmission waveform of the first common signal.

[0220] As can be seen from the foregoing introduction related to the "third common signal", the first information can be carried in the third common signal. Assume that the third common signal is the SSB: The first information can be the MIB in the PBCH of the SSB. In one possible implementation, the reserved bit field in the MIB can be used to indicate the transmission waveform of the first common signal. For example, when the reserved bit field in the MIB is 0, the transmission waveform of the first common signal can be the CP-OFDM waveform; when the reserved bit field in the MIB is 1, the transmission waveform of the first common signal can be the DFT-s-OFDM waveform. In another possible implementation, the reserved index value in the PDCCH-ConfigSIB1 in the MIB can be used to indicate the transmission waveform of the first common signal. For example, when the reserved index value is within the range of 0-4, the transmission waveform of the first common signal can be the CP-OFDM waveform, and when the reserved index value is within the range of 9-15, the transmission waveform of the first common signal can be the DFT-s-OFDM waveform.

[0221] It can be understood that since this application can be applied to scenarios of transmission waveform switching, for example, the transmission waveform switches from the CP-OFDM waveform to the DFT-s-OFDM waveform, the terminal can directly obtain the transmission waveform of the first common signal from the network device side through the first information. This can not only clearly inform the terminal of the transmission waveform of the first common signal to avoid the situation of chaotic transmission waveforms, but also save the signaling overhead of additionally indicating the transmission waveform of the first common signal.

[0222] Implementation Method 2: The network device indirectly informs the terminal of the transmission waveform of the first common signal. In the above Implementation Method 2, the third common signal is used to indicate the transmission waveform of the first common signal.

[0223] Among them, the transmission waveform of the first common signal is indicated by at least one of the following third common signals: the first demodulation reference signal sequence, or the primary synchronization signal PSS / secondary synchronization signal SSS sequence. Among them, there is a corresponding relationship between the transmission waveform of the first common signal and the first demodulation reference signal sequence, and there is a corresponding relationship between the transmission waveform of the first common signal and the PSS / SSS sequence.

[0224] In an example, the corresponding relationship between the transmission waveform of the first common signal and the first demodulation reference signal sequence may be: when the first demodulation reference signal sequence is a ZC sequence or a Gray complementary sequence, the transmission waveform of the first common signal may be a DFT-s-OFDM waveform; when the first demodulation reference signal sequence is other sequences, the transmission waveform of the first common signal may be a CP-OFDM waveform, where other sequences refer to sequences other than the ZC sequence or the Gray complementary sequence.

[0225] In another example, the corresponding relationship between the transmission waveform of the first common signal and the PSS / SSS sequence may be: when the PSS / SSS sequence is a new sequence, the transmission waveform of the first common signal may be a DFT-s-OFDM waveform; when the PSS / SSS sequence is an original sequence, the transmission waveform of the first common signal may be a CP-OFDM waveform. Among them, the original sequence may include an m sequence and / or a gold sequence, and the new sequence refers to a sequence other than the original sequence, for example, a ZC sequence. Of course, the above are only exemplary descriptions of the original sequence and the new sequence. The original sequence may also include other sequences, and the new sequence may also include other sequences. The embodiments of the present application do not impose any restrictions on this.

[0226] It can be understood that since the present application can be applied to a scenario of transmission waveform switching, for example, the transmission waveform is switched from a CP-OFDM waveform to a DFT-s-OFDM waveform, the terminal can indirectly obtain the transmission waveform of the first common signal from the network device side through the signal sequence in the third common signal (for example, the demodulation reference signal sequence and / or the PSS / SSS sequence). In this way, the terminal can indirectly determine the transmission waveform of the first common signal through the signal sequence indicated by the third common signal and the pre-configured corresponding relationship, so as to avoid the situation of transmission waveform disorder and save the signaling overhead of additionally indicating the transmission waveform of the first common signal.

[0227] The above-described multiplexing method of the first demodulation reference signal is mainly for the DFT-s-OFDM scenario. However, for the CP-OFDM scenario, the first demodulation reference signal can also be multiplexed, that is, the first demodulation reference signal can also be used to demodulate the second common signal, and the second demodulation reference signal can also be used to demodulate the first common signal.

[0228] In one implementation, when the precoding granularity of the first demodulation reference signal is the same as that of the second demodulation reference signal, the first demodulation reference signal can also be used to demodulate the second common signal, and the second demodulation reference signal can also be used to demodulate the first common signal. In this case, the terminal can demodulate all the signals in the first common signal according to the first demodulation reference signal, or demodulate the part of the signals in the first common signal that has the same frequency resources as the first demodulation reference signal according to the first demodulation reference signal.

[0229] For example, as Figure 14 shown, the vertical direction represents the time domain dimension, and the horizontal direction represents the frequency domain dimension. Taking the first common signal as PDCCH for SIB1, the first demodulation reference signal as PDCCH DMRS, the second common signal as PDSCH for SIB1, and the second demodulation reference signal as PDSCH DMRS as an example: PDCCH for SIB1 and PDCCH DMRS (hereinafter collectively referred to as PDCCH) are located in symbol 0, and PDCCH for SIB1 and PDSCH DMRS (hereinafter collectively referred to as PDSCH) start from symbol 1 (the number of continuous symbols is not limited). The frequency domain resources of PDCCH (i.e., PDCCH precoding REG group j to PDCCH precoding REG group j + 1) include 24 REGs, and the precoding granularity of PDCCH is K1 REGs, where K1 is 2. For example, precoding is performed with the combination of RDG0 and REG1, or for another example, precoding is performed with the combination of RDG10 and REG11; the frequency domain resources of PDSCH are precoding REG group j + 1. The frequency domain resources of PDSCH (i.e., PDSCH precoding PRG group j to PDSCH precoding PRG group j + 1) include 24 REGs, and the precoding granularity of PDSCH is K2 REGs, where K2 is 2. The terminal can demodulate all the signals in PDSCH for SIB1 according to PDCCH DMRS, or demodulate the part of the signals in PDSCH for SIB1 that has the same frequency position as the first demodulation reference signal according to the first demodulation reference signal.

[0230] In another implementation, when the precoding granularity of the first demodulation reference signal is different from that of the second demodulation reference signal, but there is partial overlap between the precoding resource block groups of the second common signal and the first demodulation reference signal, and the precoding of the first common signal is the same as the precoding of the second common signal, the first demodulation reference signal in the overlapping part can be used to demodulate the second common signal in the overlapping part.

[0231] For example, as Figure 15 shown, the vertical direction represents the time domain dimension, and the horizontal direction represents the frequency domain dimension. Taking the first common signal as PDCCH for SIB1, the first demodulation reference signal as PDCCH DMRS, the second common signal as PDSCH for SIB1, and the second demodulation reference signal as PDSCH DMRS as an example: PDCCH for SIB1 and PDCCH DMRS (hereinafter collectively referred to as PDCCH) are located in symbol 0, and PDSCH for SIB1 and PDSCH DMRS (hereinafter collectively referred to as PDSCH) start from symbol 1 (the number of continuous symbols is not limited). The precoding granularity of PDCCH is K1 REGs, where K1 is 3; the precoding granularity of PDSCH is K2 REGs, where K2 is 2. The precoding resource block group of PDSCH includes a coincidence part with the precoding resource block group of PDCCH, and the precoding of PDSCH precoding PRG j in this coincidence part is the same as the precoding of PDCCH precoding REG group j. Figure 15 The same pattern is used to represent the same precoding in

[0232] Figures 16 to 18 FIG. is a schematic structural diagram of a possible communication device provided by an embodiment of the present application. These communication devices can be used to implement the functions of the terminal or network device in the above method embodiments, and thus can also achieve the beneficial effects possessed by the above method embodiments. In the embodiments of the present application, the communication device may be such as Figure 1 shown terminal 120, or may be such as Figure 1 shown network device 110, or may also be a module (such as a chip) applied to the terminal or network device.

[0233] As Figure 16 shown, the communication device 1600 includes a processing module 1610 and a transceiver module 1620. The communication device 1600 is used to implement the functions of the terminal or network device in the above Figure 10 shown method embodiments.

[0234] When the communication device 1600 is used to implement Figure 7When implementing the functions of the terminal in the method embodiments shown: The processing module 1610 is configured to instruct the transceiver module 1620 to receive a first common signal and a first demodulation reference signal from a network device. The first common signal is carried on a downlink control channel, and the first demodulation reference signal is used to demodulate the first common signal. The time domain resources of the first common signal and the time domain resources of the first demodulation reference signal are different.

[0235] In some embodiments, the processing module 1610 is further configured to instruct the transceiver module 1620 to receive first information from the network device. The first information is used to indicate at least one of the following: the time domain resources of the first common signal, the frequency domain resources of the first common signal, the time domain resources of the first demodulation reference signal, or the frequency domain resources of the first demodulation reference signal.

[0236] In some embodiments, the first information is further used to indicate the transmission waveform of the first common signal.

[0237] In some embodiments, the time-frequency resources of the first common signal are different from the time domain resources of a third common signal. The third common signal is carried on a broadcast channel, and the third common signal includes the first information.

[0238] In some embodiments, the third common signal is used to indicate the transmission waveform of the first common signal. Among them, the transmission waveform of the first common signal is indicated by at least one of the following in the third common signal: a first demodulation reference signal sequence, or a primary synchronization signal PSS / secondary synchronization signal SSS sequence. There is a corresponding relationship between the transmission waveform of the first common signal and the first demodulation reference signal sequence, and there is a corresponding relationship between the transmission waveform of the first common signal and the PSS / SSS sequence.

[0239] In some embodiments, the transmission modes of the first common signal and the first demodulation reference signal are the same.

[0240] In some embodiments, the transmission waveform of the first common signal is the same as the transmission waveform of a second common signal, and / or, the modulation mode of the first common signal is the same as the modulation mode of the second common signal. Among them, the second common signal is carried on a downlink data channel.

[0241] In some embodiments, under a first condition, the first demodulation reference signal is further used to demodulate a second common signal. Among them, the first condition includes at least one of the following: the transmission modes of the first common signal and the second common signal are the same; the transmission modes of the first common signal and the second demodulation reference signal are the same; the transmission modes of the second common signal and the first demodulation reference signal are the same; or, the transmission modes of the first demodulation reference signal and the second demodulation reference signal are the same. The second demodulation reference signal is used to demodulate the second common signal.

[0242] In some embodiments, when the time-domain resources of the first demodulation reference signal are different from those of the second demodulation reference signal, the first demodulation reference signal and the second demodulation reference signal are used to jointly demodulate the second common signal; or, both the first demodulation reference signal and the second demodulation reference signal are the third demodulation reference signal, and the third demodulation reference signal is used to demodulate the first common signal and the second common signal.

[0243] In some embodiments, the same transmission mode includes at least one of the following: the same channel parameters, the same precoding, the same antenna port number, or the same precoding granularity, where the precoding granularity is the full-band precoding granularity.

[0244] In some embodiments, the transmission waveform is a DFT-s-OFDM waveform.

[0245] When the communication device 1600 is used to implement Figure 7 the functions of the network device in the method embodiments shown: the processing module 1610 is configured to instruct the transceiver module 1620 to send a first common signal and a first demodulation reference signal to the terminal, the first common signal is carried on a downlink control channel, and the first demodulation reference signal is used to demodulate the first common signal; the time-domain resources of the first common signal are different from those of the first demodulation reference signal.

[0246] In some embodiments, the processing module 1610 is further configured to instruct the transceiver module 1620 to send first information to the terminal; the first information is used to indicate at least one of the following: the time-domain resources of the first common signal, the frequency-domain resources of the first common signal, the time-domain resources of the first demodulation reference signal, or the frequency-domain resources of the first demodulation reference signal.

[0247] In some embodiments, the first information is further used to indicate the transmission waveform of the first common signal.

[0248] In some embodiments, the time-frequency resources of the first common signal are different from the time-domain resources of the third common signal, the third common signal is carried on a broadcast channel, and the third common signal includes the first information.

[0249] In some embodiments, the third common signal is used to indicate the transmission waveform of the first common signal, where the transmission waveform of the first common signal is indicated by at least one of the following in the third common signal: the first demodulation reference signal sequence, or the primary synchronization signal PSS / secondary synchronization signal SSS sequence; the transmission waveform of the first common signal has a corresponding relationship with the first demodulation reference signal sequence, and the transmission waveform of the first common signal has a corresponding relationship with the PSS / SSS sequence.

[0250] In some embodiments, the transmission modes of the first common signal and the first demodulation reference signal are the same.

[0251] In some embodiments, the transmission waveform of the first common signal is the same as that of the second common signal, and / or, the modulation method of the first common signal is the same as that of the second common signal, where the second common signal is carried on a downlink data channel.

[0252] In some embodiments, under a first condition, the first demodulation reference signal is further used to demodulate the second common signal; where the first condition includes at least one of the following: the transmission methods of the first common signal and the second common signal are the same; the transmission methods of the first common signal and the first demodulation reference signal are the same; the transmission methods of the second common signal and the first demodulation reference signal are the same; or, the transmission methods of the first demodulation reference signal and the second demodulation reference signal are the same; the second demodulation reference signal is used to demodulate the second common signal.

[0253] In some embodiments, when the time-domain resources of the first demodulation reference signal and the second demodulation reference signal are different, the first demodulation reference signal and the second demodulation reference signal are used to jointly demodulate the second common signal; or, the first demodulation reference signal and the second demodulation reference signal are both the third demodulation reference signal, and the third demodulation reference signal is used to demodulate the first common signal and the second common signal.

[0254] In some embodiments, the same transmission method includes at least one of the following: the same channel parameters, the same precoding, the same antenna port number, or the same precoding granularity, where the precoding granularity is a full-band precoding granularity.

[0255] In some embodiments, the transmission waveform is a DFT-s-OFDM waveform.

[0256] For a more detailed description of the above processing module 1610 and transceiver module 1620, reference may be made to Figure 10 the relevant description in the method embodiments shown.

[0257] As Figure 17 shown, an embodiment of the present application provides a communication device 1700, which includes a processor 1710 and an interface circuit 1720. The processor 1710 and the interface circuit 1720 are coupled to each other. It can be understood that the interface circuit 1720 can be a transceiver or an input / output interface. Optionally, the communication device 1700 may further include a memory 1730, which is used to store instructions executed by the processor 1710 or store input data required for the processor 1710 to run instructions or store data generated after the processor 1710 runs instructions. Sometimes, the interface circuit 1720 can also be understood as a part of the processor 1710, and in this case, the communication device 1700 includes the processor 1710.

[0258] When the communication device 1700 is used to implement Figure 7When implementing the method shown, the processor 1710 is used to implement the functions of the above-mentioned processing unit 1610, and the interface circuit 1720 is used to implement the functions of the above-mentioned transceiver unit 1620.

[0259] As Figure 18 As shown, an embodiment of the present application provides a communication device 1800. The communication device 1800 may include at least one processor 1810, and the processor 1810 is coupled to a memory. Optionally, the memory may be located inside or outside the device. For example, the communication device 1800 may further include at least one memory 1820. The memory 1820 stores the necessary computer programs, configuration information, computer programs or instructions, and / or data for implementing any of the above embodiments; the processor 1810 may execute the computer programs stored in the memory 1820 to complete the methods in any of the above embodiments.

[0260] The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information interaction between devices, units or modules. The processor 1810 may cooperate with the memory 1820. In the embodiments of the present application, the specific connection medium between the transceiver 1830, the processor 1810 and the memory 1820 is not limited.

[0261] The communication device 1800 may further include a transceiver 1830. The communication device 1800 may interact with other devices through the transceiver 1830. The transceiver 1830 may be a circuit, a bus, a transceiver or any other device that can be used for information interaction, or is referred to as a signal transceiver unit. As Figure 18 shown, the transceiver 1830 includes a transmitter 1831, a receiver 1832 and an antenna 1833. In addition, when the communication device 1800 is a chip-like device or circuit, the transceiver in the device 1800 may also be an input / output circuit and / or a communication interface, which can input data (or receive data) and output data (or send data), and the processor is an integrated processor, a microprocessor or an integrated circuit. The processor may determine the output data according to the input data.

[0262] In a possible implementation, the communication device 1800 can be applied to a network device. Specifically, the communication device 1800 can be a network device, or a device that can support a network device and implement the functions of the network device in any of the above-mentioned embodiments. The memory 1820 stores the necessary computer programs, computer programs or instructions, and / or data for implementing the functions of the network device in any of the above-mentioned embodiments. The processor 1810 can execute the computer programs stored in the memory 1820 to complete the methods executed by the network device in any of the above-mentioned embodiments. When applied to a network device, the transmitter 1831 in the communication device 1800 can be used to send transmission control configuration information to a terminal through the antenna 1833, and the receiver 1832 can be used to receive transmission information sent by the terminal through the antenna 1833.

[0263] In another possible implementation, the communication device 1800 can be applied to a terminal. Specifically, the communication device 1800 can be a terminal, or a device that can support a terminal and implement the functions of the terminal in any of the above-mentioned embodiments. The memory 1820 stores the necessary computer programs, computer programs or instructions, and / or data for implementing the functions of the terminal in any of the above-mentioned embodiments. The processor 1810 can execute the computer programs stored in the memory 1820 to complete the methods executed by the terminal in any of the above-mentioned embodiments. When applied to a terminal, the receiver 1832 in the communication device 1800 can be used to receive transmission control configuration information sent by a network device through the antenna 1833, and the transmitter 1831 can be used to send transmission information to the network device through the antenna 1833.

[0264] Since the communication device 1800 provided in this embodiment can be applied to a network device to complete the methods executed by the network device, or applied to a terminal to complete the methods executed by the terminal. Therefore, the technical effects it can obtain can be referred to the above method embodiments and will not be elaborated here.

[0265] When the above communication device is a chip applied to a terminal, the terminal chip implements the functions of the terminal in the above method embodiments. The terminal chip receives information from a network device, which can be understood as the information is first received by other modules (such as a radio frequency module or an antenna) in the terminal, and then sent to the terminal chip by these modules. The terminal chip sends information to the network device, which can be understood as the information is first sent to other modules (such as a radio frequency module or an antenna) in the terminal, and then sent to the network device by these modules.

[0266] When the above communication device is a chip applied to a network device, the network device chip implements the functions of the network device in the above method embodiments. The network device chip receives information from a terminal, which can be understood as the information is first received by other modules (such as a radio frequency module or an antenna) in the network device and then sent to the network device chip by these modules. The network device chip sends information to the terminal, which can be understood as the information is sent to other modules (such as a radio frequency module or an antenna) in the network device and then sent to the terminal by these modules.

[0267] In this application, entity A sending information to entity B can be that A directly sends to B or A indirectly sends to B through other entities. Similarly, entity B receiving information from entity A can be that entity B directly receives the information sent by entity A or entity B indirectly receives the information sent by entity A through other entities. Here, entity A and B can be RAN nodes or terminals, or modules inside RAN nodes or terminals. The sending and receiving of information can be the information interaction between a RAN node and a terminal, for example, the information interaction between a network device and a terminal; the sending and receiving of information can also be the information interaction between two RAN nodes, for example, the information interaction between a CU and a DU; the sending and receiving of information can also be the information interaction between different modules within a device, for example, the information interaction between a terminal chip and other modules of the terminal, or the information interaction between a network device chip and other modules in the network device.

[0268] It can be understood that the processor in the embodiments of this application can 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. The general-purpose processor can be a microprocessor or any conventional processor.

[0269] The method steps in the embodiments of the present application can be implemented in hardware or in software instructions executable by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, a register, a hard disk, a removable hard disk, a CD-ROM, or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. The storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in a network device or a terminal. The processor and the storage medium can also exist as discrete components in a network device or a terminal.

[0270] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions of the embodiments of the present application are executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, or other programmable devices. The computer program or instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program or instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired or wireless manner. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrating one or more available media. The available medium can be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it can also be an optical medium, such as a digital video disc; or it can be a semiconductor medium, such as a solid-state drive. The computer-readable storage medium can be a volatile or non-volatile storage medium, or can include both volatile and non-volatile types of storage media.

[0271] In various embodiments of the present application, if there is no special description and logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0272] In this application, "at least one" means one or more, and "a plurality of" means two or more. "And / or" describes the relationship between associated objects and indicates that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, or B exists alone, where A and B can be singular or plural. In the written description of this application, the character " / " generally indicates an "or" relationship between the associated objects before and after; in the formulas of this application, the character " / " indicates a "division" relationship between the associated objects before and after. "Including at least one of A, B, and C" can represent: including A; including B; including C; including A and B; including A and C; including B and C; including A, B, and C.

[0273] It can be understood that the various numerical numbers involved in the embodiments of this application are only for convenience of description and are not used to limit the scope of the embodiments of this application. The magnitudes of the sequence numbers of the above processes do not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic.

Claims

1. A signal transmission method, characterized in that, Comprising: Receiving a first common signal and a first demodulation reference signal from a network device, where the first common signal is carried on a downlink control channel, and the first demodulation reference signal is used to demodulate the first common signal; the time-domain resources of the first common signal and the time-domain resources of the first demodulation reference signal are different.

2. The method according to claim 1, characterized in that, The method further comprises: Receiving first information from the network device; the first information is used to indicate at least one of the following: the time-domain resources of the first common signal, the frequency-domain resources of the first common signal, the time-domain resources of the first demodulation reference signal, or the frequency-domain resources of the first demodulation reference signal.

3. The method according to claim 2, characterized in that, The first information is further used to indicate the transmission waveform of the first common signal.

4. The method according to claim 2 or 3, characterized in that The time-frequency resources of the first common signal are different from the time-domain resources of a third common signal, where the third common signal is carried on a broadcast channel, and the third common signal includes the first information.

5. The method according to claim 4, characterized in that, The third common signal is used to indicate the transmission waveform of the first common signal, where the transmission waveform of the first common signal is indicated by at least one of the following in the third common signal: a first demodulation reference signal sequence, or a primary synchronization signal PSS / secondary synchronization signal SSS sequence; the transmission waveform of the first common signal has a corresponding relationship with the first demodulation reference signal sequence, and the transmission waveform of the first common signal has a corresponding relationship with the PSS / SSS sequence.

6. The method according to any one of claims 1-5, characterized in that The transmission modes of the first common signal and the first demodulation reference signal are the same.

7. The method according to any one of claims 1-6, characterized in that, The transmission waveform of the first common signal is the same as the transmission waveform of a second common signal, and / or, the modulation mode of the first common signal is the same as the modulation mode of the second common signal; wherein, the second common signal is carried on a downlink data channel.

8. The method according to claim 7, wherein Under a first condition, the first demodulation reference signal is further used to demodulate the second common signal; where the first condition includes at least one of the following: The transmission modes of the first common signal and the second common signal are the same; The transmission modes of the first common signal and a second demodulation reference signal are the same; The transmission modes of the second common signal and the first demodulation reference signal are the same; Or, the transmission modes of the first demodulation reference signal and the second demodulation reference signal are the same; the second demodulation reference signal is used to demodulate the second common signal.

9. The method according to claim 8, wherein When the time-domain resources of the first demodulation reference signal and the time-domain resources of the second demodulation reference signal are different, the first demodulation reference signal and the second demodulation reference signal are used to jointly demodulate the second common signal; Or, the first demodulation reference signal and the second demodulation reference signal are both a third demodulation reference signal, and the third demodulation reference signal is used to demodulate the first common signal and the second common signal.

10. The method according to any one of claims 6-9, characterized in that The same transmission mode includes at least one of the following: the same channel parameters, the same precoding, the same antenna port number, or the same precoding granularity, where the precoding granularity is a full-band precoding granularity.

11. The method according to any one of claims 3 to 10, characterized in that, The transmission waveform is a discrete Fourier transform spread spectrum orthogonal frequency division multiplexing DFT-s-OFDM waveform.

12. A signal transmission method, characterized in that, Comprising: Send a first common signal and a first demodulation reference signal to a terminal, where the first common signal is carried on a downlink control channel, and the first demodulation reference signal is used to demodulate the first common signal; the time-domain resources of the first common signal and the time-domain resources of the first demodulation reference signal are different.

13. The method according to claim 12, characterized in that, The method further includes: Send first information to the terminal; the first information is used to indicate at least one of the following: the time-domain resources of the first common signal, the frequency-domain resources of the first common signal, the time-domain resources of the first demodulation reference signal, or the frequency-domain resources of the first demodulation reference signal.

14. The method according to claim 12, characterized in that, The first information is further used to indicate the transmission waveform of the first common signal.

15. The method according to claim 13 or 14, characterized in that The time-frequency resources of the first common signal are different from the time-domain resources of a third common signal, where the third common signal is carried on a broadcast channel and the third common signal includes the first information.

16. The method according to claim 15, wherein The third common signal is used to indicate the transmission waveform of the first common signal, where the transmission waveform of the first common signal is indicated by at least one of the following in the third common signal: a first demodulation reference signal sequence, or a primary synchronization signal PSS / secondary synchronization signal SSS sequence; the transmission waveform of the first common signal has a corresponding relationship with the first demodulation reference signal sequence, and the transmission waveform of the first common signal has a corresponding relationship with the PSS / SSS sequence.

17. The method according to any one of claims 12-16, characterized in that, The transmission modes of the first common signal and the first demodulation reference signal are the same.

18. The method according to any one of claims 12-17, characterized in that, The transmission waveform of the first common signal is the same as the transmission waveform of a second common signal, and / or, the modulation mode of the first common signal is the same as the modulation mode of the second common signal, where the second common signal is carried on a downlink data channel.

19. The method according to claim 18, wherein Under a first condition, the first demodulation reference signal is further used to demodulate the second common signal; where the first condition includes at least one of the following: The transmission modes of the first common signal and the second common signal are the same; The transmission modes of the first common signal and a second demodulation reference signal are the same; The transmission modes of the second common signal and the first demodulation reference signal are the same; Or, the transmission modes of the first demodulation reference signal and the second demodulation reference signal are the same; the second demodulation reference signal is used to demodulate the second common signal.

20. The method according to claim 19, wherein When the time-domain resources of the first demodulation reference signal and the time-domain resources of the second demodulation reference signal are different, the first demodulation reference signal and the second demodulation reference signal are used to jointly demodulate the second common signal; Or, the first demodulation reference signal and the second demodulation reference signal are both a third demodulation reference signal, and the third demodulation reference signal is used to demodulate the first common signal and the second common signal.

21. The method according to any one of claims 17-20, characterized in that, The same transmission mode includes at least one of the following: the same channel parameters, the same precoding, the same antenna port number, or the same precoding granularity, where the precoding granularity is a full-band precoding granularity.

22. The method according to any one of claims 14-21, characterized in that, The transmission waveform is a discrete Fourier transform spread spectrum orthogonal frequency division multiplexing DFT-s-OFDM waveform.

23. A communication device, characterized in that, Includes: A functional unit for performing the method according to any one of claims 1-11, or a functional unit for performing the method according to any one of claims 12-22; wherein, the actions performed by the functional unit are implemented by hardware or by hardware executing corresponding software.

24. A communication device, characterized in that, The communication device includes a processor; the processor is configured to run a computer program or instruction, or to use a logic circuit to cause the communication device to perform the method according to any one of claims 1-11, or to cause the communication device to perform the method according to any one of claims 12-22.

25. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions or programs, which, when run on a computer, cause the communication device to perform the method according to any one of claims 1-11, or to cause the communication device to perform the method according to any one of claims 12-22.

26. A communication system, characterized in that, Comprising: A communication device for performing the method according to any one of claims 1-11 and a communication device for performing the method according to any one of claims 12-22.

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