Information transmission method and related apparatus

Abstract

The present application provides an information transmission method and a related apparatus. The method comprises: sending first-level downlink control information (DCI), the first-level DCI being used for indicating at least one type of information transmitted on a target transmission resource and the priority of the information, and the term "type" of the information comprising second-level DCI, or further comprising data; and sending the information on the target transmission resource on the basis of the type of the information and the priority of the information. Using the method can improve data transmission efficiency.

Description

Information transmission method and related device Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an information transmission method and related devices. Background Art

[0002] Over the past few decades, wireless communication systems have undergone a technological evolution and research, from first-generation analog communications to 5G New Radio (NR) and the current sixth-generation mobile networks (6G). Throughout this complex evolution, high throughput and a large number of connections have always been core challenges for wireless communication networks. To address these challenges, 5G communications proposes applications such as enhanced mobile broadband (eMBB), ultra-reliable, low-latency communications (URLLC), and massive machine-type communications (mMTC) as technical goals. Future 6G wireless communication systems will inevitably evolve towards higher throughput, lower latency, higher reliability, a larger number of connections, and greater spectrum efficiency.

[0003] In this context, a two-level downlink control information (DCI) technology was proposed. Specifically, the existing DCI is divided into two levels for transmission. The first-level DCI indicates the time-frequency resources of the second-level DCI, and the second-level DCI indicates the resources of the physical downlink shared channel (PDSCH). The first-level DCI only needs to include key information such as the time-frequency resources of the second-level DCI, thereby reducing the blind detection complexity of the DCI. In addition, the resources of the second-level DCI are indicated by the first-level DCI, and the second-level DCI does not require blind detection. Therefore, the flexibility of the DCI indication can be improved, and the fields included in the second-level DCI can also be more flexible. In addition, in the design of two-level DCI, the resources of the second-level DCI can also include some data, that is, PDSCH is multiplexed with the second-level DCI.

[0004] However, in the existing two-level DCI, the second-level DCI may include DCI information or data of multiple priorities. The specific scheme for indicating the transmission of these DCI information and data on time-frequency resources and how to map them is still unclear.

[0005] Summary of the Invention

[0006] The present application provides an information transmission method and related devices, which can indicate how to map and send information of different priorities when the second-level DCI includes information of multiple priorities, thereby improving data transmission efficiency.

[0007] In a first aspect, an information transmission method is provided, which can be executed by a base station or a chip in the base station, or by a terminal device or a chip in the terminal device, and the method includes: sending first-level downlink control information DCI, where the first-level DCI is used to indicate at least one type of information transmitted on a target transmission resource, and the priority of the information, the type of information including second-level DCI, or also including data; and sending information on the target transmission resource based on the type of information and the priority of the information.

[0008] In the embodiments of the present application, by adding indication information to the first-level DCI, it is used to clearly indicate the second-level DCI to be transmitted on the target transmission resource, or also includes the information type of the data multiplexed with the second DCI, and their corresponding priorities. Based on their information type and information priority, the information is sent on the target transmission resource, which can ensure the transmission of high-priority information and effectively improve the efficiency of the receiving end in receiving and obtaining information on the target transmission resource.

[0009] In some possible implementations, the priority of the second-level DCI includes: the second-level DCI corresponds to the same priority; or the second-level DCI includes multiple parts corresponding to different priorities.

[0010] In some possible implementations, the data includes enhanced mobile broadband (eMBB) data, or ultra-reliable low-latency communication (URLLC) data.

[0011] In some possible implementations, there are pre-configured DMRS and additional DMRS corresponding to the data on the target transmission resource, and the first-level DCI is further used to indicate whether there is an additional DMRS and a mapping method of the additional DMRS.

[0012] In an embodiment of the present application, additional DMRS is added to the target transmission resource to add additional DMRS for high-priority information, so that the receiving end can obtain high-priority information based on more demodulation information, thereby improving the transmission reliability of high-priority information.

[0013] In some possible implementations, the preconfigured DMRS is located on the first symbol of the target transmission resource, and the additional DMRS is located on the Kth symbol after the preconfigured DMRS on the target transmission resource, where K is a positive integer.

[0014] In some possible implementations, the preconfigured DMRS is located on symbols other than the first symbol on the target transmission resource, and the additional DMRS is located on the first symbol of the target transmission resource.

[0015] In some possible implementations, an additional DMRS replaces a preconfigured DMRS, and a mapping manner of the additional DMRS is different from a mapping manner of the configured DMRS.

[0016] In some possible implementations, the additional DMRS is located on the Mth symbol where the pre-configured DMRS is originally located, and the pre-configured DMRS is shifted backward by R symbols from the Mth symbol, where R is a positive integer.

[0017] In some possible implementations, the first-level DCI is further used to indicate the mapping mode and / or the starting position in the frequency domain of the additional DMRS.

[0018] In the embodiment of the present application, since the target transmission resources indicated by the first-level DCI are used to transmit various types of information with multiple priorities, additional DMRS can be added for channel estimation so that the receiving end can obtain more accurate information content based on the additional DMRS demodulation, thereby improving the reliability of the transmission of various types of information.

[0019] In some possible implementations, sending information includes: the information is sent in a manner of mapping to subsequent resource elements RE in the order of frequency domain first and time domain later, from the target time-frequency position where the first column DMRS is located, according to the priority of the information from high to low. The first column DMRS is located in the first symbol of the target transmission resource and is a DMRS with higher frequency domain density among the pre-configured DMRS and the additional DMRS.

[0020] In some possible implementations, sending information includes: according to the priority of the information, the information is mapped to the preceding RE from the target time-frequency position where the K-th column DMRS is located, in the order of frequency domain first and time domain later, until the front-end resources of the target transmission resources are all occupied, and then sent from the target time-frequency position in the order of frequency domain first and time domain later to the subsequent RE mapping, the K-th column DMRS is located at the K-th symbol of the target transmission resource, and is a DMRS with higher frequency domain density among the pre-configured DMRS and the additional DMRS, and K is a positive integer greater than 1.

[0021] In some possible implementations, sending information includes: according to the priority of the information, the information is mapped to the forward RE in the order of frequency domain first and time domain later from the target time-frequency position where the K-th column DMRS is located until the mapping of one symbol is completed, and then mapped from the target time-frequency position to the backward RE until the mapping of one symbol is completed, and the mapping in these two directions is switched until the mapping of the information is completed. The K-th column DMRS is located at the K-th symbol of the target transmission resource, and is a DMRS with higher frequency domain density among the pre-configured DMRS and the additional DMRS, and K is a positive integer greater than 1.

[0022] In this embodiment of the present application, when additional DMRS is added to the target transmission resource configured by the first-level DCI, information of various priorities is mapped in descending order of priority, starting from the symbol with the higher density of the pre-configured DMRS and the additional DMRS, and moving away from that DMRS until all information is mapped, and the information on the target transmission resource is sent. This process ensures the transmission reliability of high-priority information, thereby improving transmission efficiency.

[0023] In some possible implementations, the data corresponds to a pre-configured DMRS on the target transmission resource and there is no additional DMRS, and sending the information includes: sending the information according to the priority of the information, from the target time-frequency position where the first column of DMRS is located, in the order of first frequency domain and then time domain to the subsequent RE mapping, and the first column of DMRS is located in the first symbol of the target transmission resource; or

[0024] The information is mapped to the forward REs in the order of frequency domain first and time domain second from the target time-frequency position where the Kth column DMRS is located according to the priority of the information, until the front-end resources of the target transmission resources are all occupied, and then the information is mapped to the backward REs in the order of frequency domain first and time domain second from the target time-frequency position; or

[0025] According to the priority of the information, the information is mapped from the target time-frequency position where the T-th column DMRS is located, in the order of frequency domain first and time domain later, to the preceding RE until the mapping of one symbol is completed, and then mapped from the target time-frequency position to the succeeding RE until the mapping of one symbol is completed, and the mapping in these two directions is switched until the mapping of the information is completed. Among them, the K-th column DMRS is located at the K-th symbol of the target transmission resource, and K is a positive integer greater than 1.

[0026] In an embodiment of the present application, when the first-level DCI only includes pre-configured DMRS, information of different priorities can be mapped from a time-frequency position close to the DMRS to a time-frequency position originally away from the DMRS in order of priority from high to low. In this way, information with higher priority can be closer to the DMRS, so that when the receiving end demodulates the signal through the DMRS, the reliability of obtaining high-priority information can be guaranteed.

[0027] In some possible implementations, mapping of information on REs includes sequential mapping on each RE, or uniform mapping on REs of each symbol.

[0028] In a second aspect, a communication device is provided, the device including a transceiver module configured to:

[0029] Sending first-level downlink control information (DCI), where the first-level DCI is used to indicate at least one type of information to be transmitted on the target transmission resource and the priority of the information. The type of information includes second-level DCI or also includes data;

[0030] It is also used to send information on target transmission resources based on the type of information and the priority of the information.

[0031] In some possible implementations, the priority of the second-level DCI includes: the second-level DCI corresponds to the same priority; or the second-level DCI includes multiple parts corresponding to different priorities.

[0032] In some possible implementations, the data includes enhanced mobile broadband (eMBB) data, or ultra-reliable low-latency communication (URLLC) data.

[0033] In some possible implementations, there are pre-configured DMRS and additional DMRS corresponding to the data on the target transmission resource, and the first-level DCI is further used to indicate whether there is an additional DMRS and a mapping method of the additional DMRS.

[0034] In some possible implementations, the preconfigured DMRS is located on the first symbol of the target transmission resource, and the additional DMRS is located on the Tth symbol after the preconfigured DMRS on the target transmission resource, where T is a positive integer.

[0035] In some possible implementations, the preconfigured DMRS is located on symbols other than the first symbol on the target transmission resource, and the additional DMRS is located on the first symbol of the target transmission resource.

[0036] In some possible implementations, an additional DMRS replaces a preconfigured DMRS, and a mapping manner of the additional DMRS is different from a mapping manner of the configured DMRS.

[0037] In some possible implementations, the additional DMRS is located on the Mth symbol where the pre-configured DMRS is originally located, and the pre-configured DMRS is shifted backward by R symbols from the Mth symbol, where R is a positive integer.

[0038] In some possible implementations, the first-level DCI is further used to indicate the mapping mode and / or the starting position in the frequency domain of the additional DMRS.

[0039] In some possible implementations, the transceiver module is specifically used to: send information in a manner of mapping to subsequent resource elements RE in the order of frequency domain first and time domain later, from the target time-frequency position where the first column DMRS is located, according to the priority of the information from high to low. The first column DMRS is located in the first symbol of the target transmission resource and is a DMRS with higher frequency domain density among the pre-configured DMRS and the additional DMRS.

[0040] In some possible implementations, the transceiver module is specifically used to: map information to the preceding RE from the target time-frequency position where the K-th column DMRS is located, in the order of frequency domain first and time domain later, according to the priority of the information, until the front-end resources of the target transmission resources are all occupied, and then send it from the target time-frequency position in the order of frequency domain first and time domain later to the subsequent RE mapping, the K-th column DMRS is located at the K-th symbol of the target transmission resource, and is a DMRS with higher frequency domain density among the pre-configured DMRS and the additional DMRS, and K is a positive integer greater than 1.

[0041] In some possible implementations, the transceiver module is specifically used to: map information to the forward RE in the order of frequency domain first and time domain later from the target time-frequency position where the K-th column DMRS is located according to the priority of the information until the mapping of one symbol is completed, and then map it to the backward RE from the target time-frequency position until the mapping of one symbol is completed, and switch the mapping in these two directions until the mapping of the information is completed. The K-th column DMRS is located at the K-th symbol of the target transmission resource, and is a DMRS with higher frequency domain density among the pre-configured DMRS and the additional DMRS, and K is a positive integer greater than 1.

[0042] In some possible implementations, there is a pre-configured DMRS corresponding to the data on the target transmission resource and no additional DMRS exists. The transceiver module is specifically configured to: send information from the target time-frequency position where the first column of DMRS is located, in the order of frequency domain first and time domain second to the subsequent RE according to the priority of the information, and the first column of DMRS is located at the first symbol of the target transmission resource; or map information from the target time-frequency position where the Kth column of DMRS is located, in the order of frequency domain first and time domain second to the preceding RE, until the front-end resources of the target transmission resource are all occupied, and then map information from the target time-frequency position to the subsequent RE in the order of frequency domain first and time domain second; or map information from the target time-frequency position where the Tth column of DMRS is located, in the order of frequency domain first and time domain second to the preceding RE until the mapping of one symbol is completed, and then map information from the target time-frequency position to the subsequent RE until the mapping of one symbol is completed, and switch the mapping in these two directions until the mapping of the information is completed.

[0043] In some possible implementations, mapping of information on REs includes sequential mapping on each RE, or uniform mapping on REs of each symbol.

[0044] In a third aspect, the present application provides an apparatus comprising a processor. The processor is coupled to a memory and can be configured to execute instructions in the memory to implement the method of the first aspect or any possible implementation of the first aspect. The apparatus further comprises a memory. The apparatus further comprises a communication interface, the processor being coupled to the communication interface.

[0045] In one implementation, the device is a base station. When the device is a base station, the communication interface may be a transceiver, or an input / output interface.

[0046] In another implementation, the device is a chip or chip system configured in a base station. When the device is a chip or chip system configured in a base station, the communication interface may be an input / output interface.

[0047] In one implementation, the apparatus is a terminal device. When the apparatus is a terminal device, the communication interface may be a transceiver, or an input / output interface.

[0048] In another implementation, the device is a chip or chip system configured in a terminal device. When the device is a chip or chip system configured in a terminal device, the communication interface may be an input / output interface.

[0049] The transceiver may be a transceiver circuit, and the input / output interface may be an input / output circuit.

[0050] In a fourth aspect, a computer-readable storage medium is provided, in which a computer program or instruction is stored. When the computer program or instruction is executed, the method in any possible implementation manner of the first aspect is implemented.

[0051] In a fifth aspect, a computer program product comprising instructions is provided, which, when executed, implements the method in any possible implementation manner of the first aspect.

[0052] In a sixth aspect, a computer program is provided, which includes codes or instructions. When the codes or instructions are executed, the method in any possible implementation manner of the first aspect is implemented.

[0053] In a seventh aspect, a chip system is provided, comprising a processor and a memory, for implementing the method in any possible implementation described in the first aspect. The chip system may be composed of a chip or may include a chip and other discrete devices.

[0054] In an eighth aspect, a communication system is provided, which includes the device in any possible implementation of the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] FIG1 is a schematic structural diagram of a communication system applicable to an embodiment of the present application.

[0056] FIG2 is a schematic diagram of a two-stage DCI technology provided in an embodiment of the present application.

[0057] FIG3 is a schematic diagram of a second-level DCI and data multiplexing provided in an embodiment of the present application.

[0058] FIG4 is a schematic diagram of a demodulation reference signal (DMRS) mapping method provided in an embodiment of the present application.

[0059] FIG5 is a schematic diagram of the time domain positions of DMRSs of a single symbol and two symbols provided in an embodiment of the present application.

[0060] FIG6 is a schematic diagram of a mapping method of DMRS of PDSCH in the frequency domain provided by an embodiment of the present application.

[0061] FIG7 is a schematic diagram of the time domain position of a DMRS of a PSSCH provided in an embodiment of the present application.

[0062] FIG8 is a schematic diagram of a two-stage SCI provided in an embodiment of the present application.

[0063] FIG9A is a flow chart of an information transmission method provided in an embodiment of the present application.

[0064] FIG9B is a schematic diagram of an information mapping method provided in an embodiment of the present application.

[0065] FIG9C is a schematic diagram of another information mapping method provided in an embodiment of the present application.

[0066] 10A to 10D are schematic diagrams of additional DMRS configurations provided in an embodiment of the present application.

[0067] FIG. 11A to FIG. 11F are schematic diagrams of a mapping method including additional DMRS information provided in an embodiment of the application.

[0068] FIG12 is a schematic structural diagram of a communication device provided in an embodiment of the present application.

[0069] FIG13 is a schematic diagram of the hardware structure of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0070] The technical solution in this application will be described below with reference to the accompanying drawings.

[0071] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: a fifth generation (5G) system or a new radio (NR), a sixth generation (6G) system or a future communication system. The 5G mobile communication system described in the present application includes a non-standalone (NSA) 5G mobile communication system or a standalone (SA) 5G mobile communication system. The communication system can also be a public land mobile network (PLMN), a device-to-device (D2D) communication system, a machine-to-machine (M2M) communication system, an Internet of Things (IoT) communication system, a vehicle-to-everything (V2X) communication system, an unmanned aerial vehicle (UAV) communication system or other communication systems.

[0072] In addition, the network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field can know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0073] To facilitate understanding of the embodiment of the present application, an application scenario of the embodiment of the present application is first described in detail with reference to FIG1 .

[0074] Figure 1 is a schematic structural diagram of a communication system applicable to an embodiment of the present application. As shown in Figure 1, the system can be a network including base stations and terminal devices communicating, base stations and base stations communicating, or terminal devices communicating directly with each other. Among them, the base stations can communicate with each other through a backhaul link, which can be a wired backhaul link (such as optical fiber, copper cable) or a wireless backhaul link (such as microwave). The terminal device can communicate with the corresponding base station via a wireless link.

[0075] Base stations provide wireless access services to terminal devices. Specifically, each base station corresponds to a service coverage area (also called a cell, as shown by the elliptical areas in Figure 1). Terminal devices within this area communicate with the base station via wireless signals to receive the wireless access services provided by the base station. Base station coverage areas may overlap, and terminal devices within these overlapping areas can receive wireless signals from multiple base stations, allowing them to be served by multiple base stations simultaneously.

[0076] Depending on the wireless communication technology used, a base station may also be called a NodeB, an evolved NodeB (eNodeB), or an access point (AP). Furthermore, depending on the size of the service coverage area provided, base stations can be further categorized as macro base stations (for macro cells), micro base stations (for pico cells), and femto base stations (for femto cells). As wireless communication technology continues to evolve, base stations may also adopt other names in the future.

[0077] A terminal device can be any wireless communication device with wireless communication capabilities, such as, but not limited to, a mobile cellular phone, a cordless phone, a personal digital assistant (PDA), a smartphone, a laptop computer, a tablet computer, a wireless data card, a wireless modem (modulator demodulator, modem), or a wearable device such as a smartwatch. With the rise of the Internet of Things (IoT) technology, an increasing number of devices that previously lacked communication capabilities, such as, but not limited to, household appliances, vehicles, tools, equipment, service equipment, and service facilities, have begun to gain wireless communication capabilities by configuring wireless communication units, thereby enabling access to wireless communication networks and accepting remote control. Because such devices have wireless communication capabilities due to the configuration of wireless communication units, they also fall into the category of wireless communication devices. Furthermore, a terminal device may also be referred to as a mobile station, mobile device, mobile terminal, wireless terminal, handheld device, client, etc.

[0078] Please refer to Figure 2, which is a schematic diagram of a two-level DCI technology provided in an embodiment of the present application. As shown in Figure 2, in this technology, existing DCI is divided into two levels for transmission. The first-level DCI (1st DCI) indicates the time-frequency resources of the second-level DCI (2nd DCI), and the second-level DCI further indicates the resources of the PDSCH. The first-level DCI only needs to include key information such as the time-frequency resources of the second-level DCI, thereby reducing the blind detection complexity of the DCI. In addition, the resources of the second-level DCI are indicated by the first-level DCI, and the second-level DCI does not require blind detection. Therefore, the flexibility of the DCI indication can be improved, and the fields included in the second-level DCI can also be more flexible.

[0079] In addition, in the design of two-level DCI, the resources of the second-level DCI may also include some data, that is, PDSCH is multiplexed with the second-level DCI. Please refer to Figure 3 for details. Figure 3 is a schematic diagram of a second-level DCI and data multiplexing provided in an embodiment of the present application. As shown in Figure 3, when there is URLLC data, in order to ensure the latency of URLLC data, URLLC can be sent within the resources of the second-level DCI (2nd DCI). Or when PDSCH is eMBB data, in order to improve resource utilization and avoid resource fragmentation, part of the eMBB data can be multiplexed with the second-level DCI.

[0080] In the prior art described above, when the second-level DCI is multiplexed with data, the specific mapping scheme between the second-level DCI and the data is unclear. In addition, when the second-level DCI includes two parts with different priorities, the specific mapping scheme between the second-level DCI and the data is also unclear.

[0081] Please refer to Figure 4, which is a schematic diagram of a demodulation reference signal DMRS mapping method provided in an embodiment of the present application. This type of DMRS can be called a pre-DMRS, and its characteristic is that it is as close to the starting point of scheduling as possible. As shown in (a) in Figure 4, it is the mapping method A of the first demodulation reference signal (DMRS) of PDSCH in the time domain: the symbol of the first DMRS is located in symbol#2 (symbol 2) or symbol#3 in the time slot. This mapping method does not care about the starting position of the actual data transmission, but fixes the DMRS at the relative edge of the time slot. Or as shown in (b) in Figure 4, it is the mapping method B of the first DMRS of PDSCH in the time domain: the first DMRS symbol is fixedly mapped to the first orthogonal frequency division multiplexing (OFDM) symbol of the data transmission resource (PDSCH). At this time, the position of the DMRS is not relative to the starting position symbol#0 of the time slot, but relative to the starting position of the data transmission resource.

[0082] In addition to the first DMRS, the PDSCH DMRS may also have additional DMRS in the time domain. The time domain positions of the additional DMRS are determined by Table 1 and Table 2. Table 1 shows the time domain position of the DMRS for a single symbol, and Table 2 shows the time domain position of the DMRS for two symbols. The details are as follows:

[0083] Table 1

[0084] As shown in Table 1, l0 represents the possible location of the first DMRS. For example, in PDSCH mapping scheme A (i.e., the mapping scheme A for the first DMRS in the PDSCH time domain described above), l0 is located in symbol #2 or symbol #3 within the time slot. Symbol numbering starts at 0, meaning the first symbol within the time slot is symbol #0. For example, assuming the time-frequency resources within a time slot are 3 symbols, l0 indicates that the first DMRS can be located at symbol #2. As can be seen from the table, when the time-frequency resources within a time slot are 3 to 7 symbols, there are no additional DMRS locations. However, when the time-frequency resources within a time slot are 8 symbols, if the first DMRS is located at symbol #2 or symbol #2, the starting position of the additional DMRS can be symbol #7 within the time slot. In PDSCH mapping scheme B, l0 is fixedly mapped to the first OFDM symbol of the PDSCH. For example, assuming the time-frequency resources within the PDSCH are 3 symbols, the first DMRS can be located in the first symbol within the PDSCH resources. When the PDSCH time-frequency resources are 2 to 4 symbols, there is no additional DMRS position. However, when the PDSCH time-frequency resources are 5 symbols, and the first DMRS is located in the first PDSCH symbol, the additional DMRS can start at the fourth PDSCH symbol. The positions pos 0, pos 1, pos 2, and pos 3 in the table depend on the configuration information. The interpretation of the above table is analogous and will not be repeated here.

[0085] Table 2

[0086] As shown in Table 2, the meaning of l0 is the same as in Table 1. The difference is that the DMRS in Table 2 occupies two consecutive symbols. For example, in PDSCH mapping method A, when the symbol length in the time slot is 4, l0 indicates that the starting position of the first DMRS is symbol#2, and symbol#3 is also occupied. When the symbol length in the time slot is 10, the first DMRS can occupy symbol#2 and symbol#3, and additional DMRS can occupy symbol#10 and symbol#11. The interpretation of PDSCH mapping method B can be combined with the interpretation of Tables 1 and 2, and will not be repeated here.

[0087] Please refer to Figure 5, which is a schematic diagram of the time domain location of DMRS for a single symbol and two symbols provided in an embodiment of the present application. This diagram can be understood in conjunction with the contents of Tables 1 and 2 above. The shaded rectangles in Figure 5 are symbols where DMRS may be located. As shown in (a) of Figure 5, this is the case where DMRS occupies symbols in PDSCH mapping mode A. Assuming that DMRS occupies one symbol, when the symbol length in the time slot is 3 to 14, the first DMRS can be located on symbol#2 in the time slot. When the symbol length in the time slot is 8, DMRS can also be located on symbol#7, and this DMRS can be an additional DMRS. Assuming that DMRS occupies two symbols, when the symbol length in the time slot is 3 to 14, the first DMRS can be located on symbol#2 and symbol#3. When the time slot length is 10, DMRS can also be located on symbol#8 and symbol#9, and this DMRS can be an additional DMRS. Figure 5 (b) shows the case where DMRS occupies symbols in PDSCH mapping mode B. Assuming that DMRS occupies one symbol, when the symbol length occupied by PDSCH is 2 to 14, the first DMRS can be located on the first symbol of PDSCH. When the symbol length occupied by PDSCH is 5, DMRS can also be located on the fifth symbol of PDSCH, and this DMRS can be an additional DMRS. Assuming that DMRS occupies two symbols, when the symbol length occupied by PDSCH is 2 to 14, the first DMRS can be located on the first and second symbols of PDSCH. When the symbol length occupied by PDSCH is 8, DMRS can also be located on the sixth and seventh symbols of PDSCH, and this DMRS can be an additional DMRS. The interpretation of the remaining shaded rectangles in the figure is in accordance with the above description and will not be repeated here.

[0088] There are two ways to map the DMRS of the PDSCH in the frequency domain. For details, please refer to Figure 6, which is a schematic diagram of a mapping method of the DMRS of the PDSCH in the frequency domain provided by an embodiment of the present application, specifically including:

[0089] Configuration mode 1: DMRS resource elements (REs) are distributed at intervals in the frequency domain of a certain symbol with a density of 1 / 2, as shown in FIG6 (a).

[0090] Configuration mode 2: Every two DMRS REs are connected together, with a spacing of 4 REs between them and a density of 1 / 3, as shown in Figure 6(b).

[0091] The above descriptions are all about the DMRS mapping method of PDSCH, including the OFDM symbol where the DMRS is located in the time domain and the mapping density in the frequency domain. These are only for the case of a single PDSCH, not for the case where PDSCH and DCI information are multiplexed.

[0092] Similar to the DMRS of the PDSCH, the position of the DMRS of the physical sidelink shared channel (PSSCH) in the time domain is determined by Table 3.

[0093] Table 3

[0094] As shown in Table 3, there are two mapping methods of DMRS of PSSCH in the time domain: one is DMRS when the physical sidelink control channel (PSCCH) lasts for 2 symbols, and the other is DMRS when PSCCH lasts for 3 symbols. When the symbol length is 6, assuming that PSCCH lasts for 2 symbols and PSSCH DMRS occupies 2 symbols, DMRS can be located at symbol#1 or symbol#5. When the symbol length is 9, assuming that PSCCH lasts for 3 symbols and PSSCH DMRS occupies 3 symbols, DMRS can be located at symbol#1, symbol#4, or symbol#7. The rest of the situations in the table are interpreted in the same way and will not be repeated here.

[0095] In addition, please refer to Figure 7, which is a schematic diagram of the time domain position of the DMRS of a PSSCH provided in an embodiment of the present application. As shown in Figure 7, when the symbol length is 6 to 13, the time domain symbols where the first DMRS of the PSSCH may be located are given when the PSCCH lasts for 2 symbols and lasts for 3 symbols. This also includes different situations of symbols occupied by automatic gain control (AGC) and symbols not included in the PSSCH. This can be understood in conjunction with Table 3 and will not be repeated here.

[0096] The mapping mode of the DMRS of the PSSCH in the frequency domain is only the configuration mode 1 shown in FIG6 , that is, the DMRS RE is distributed at intervals in the frequency domain of a certain symbol with a density of 1 / 2.

[0097] In the existing sidelink transmission, the sidelink control information (SCI) is also divided into two levels. Please refer to Figure 8, which is a schematic diagram of a two-level SCI provided by an embodiment of the present application. As shown in Figure 8, the first-level SCI (1st SCI) indicates the PSSCH resources, and the second-level SCI (2nd SCI) resources are included in the PSSCH resources. The first-level SCI is represented by the field Indicates the size of resources occupied by the second-level SCI. The size of resources occupied by the second-level SCI can be calculated using the following formula:

[0098] As shown in the above formula (1), where O SCI2 is the number of bits included in the second-level SCI, L SCI2 is the number of bits corresponding to the cyclic redundancy check (CRC) of the second-level SCI, is the adjustment order of the second-level SCI, and R is the code rate indicated by the first-level SCI. As shown in Figure 8, the second-level SCI is mapped in a frequency-first, time-second order, starting from the first DMRS-carrying symbol and working backwards. In other words, the DMRS is mapped in the time domain in the order of symbols 4, 5, and 6.

[0099] As can be seen from the above description, when the second-level SCI is multiplexed with the PSSCH, a fixed mapping scheme is used. That is, the second-level SCI is mapped backward from the first symbol carrying the DMRS, and the remaining resources are used to map the PSSCH. Furthermore, for both the PDSCH and PSSCH DMRS, all DMRS symbols are configured identically in the frequency domain. When the priorities of the two multiplexed pieces of information differ, existing technologies cannot further guarantee the reliability of the higher-priority information. This is especially true when fewer DMRS symbols are configured in the time domain, further limiting the reliability of the higher-priority information.

[0100] Based on this, an embodiment of the present application provides an information transmission method, as shown in FIG9A , which includes the following steps:

[0101] 101. A transmitting end sends first-level downlink control information DCI. The first-level DCI is used to indicate at least one type of information transmitted on a target transmission resource and a priority of the information. The type of information includes second-level DCI or also includes data.

[0102] In the embodiment of the present application, since it can be communication between a base station and a terminal device, or communication between a base station and a base station, or communication between a terminal device and a terminal device, the transmitting end can be a base station or a terminal device. The transmitting end sends a first-level DCI, which includes indication information for indicating one or more types of information transmitted on the target transmission resource and the priority of the information, that is, the indication information indicates at least one level of priority of the second-level DCI. The priority can be represented by a numerical value, and the value range can be pre-set. For example, from 1 to 8, a larger numerical value indicates a higher priority, or a smaller numerical value indicates a higher priority. Taking the smaller numerical value as an example, assuming that the indication information indicates that the second-level DCI is transmitted on the target transmission resource, its priority is 1. It means that the second-level DCI has the highest priority. The priority of the remaining information transmitted on the target transmission resource is lower than the second-level DCI. The priority of the remaining information can be indicated or not.

[0103] In some cases, the second-level DCI corresponds to the same priority; or the second-level DCI includes multiple parts corresponding to different priorities.

[0104] In some cases, the data includes enhanced mobile broadband (eMBB) data, or ultra-reliable low-latency communication (URLLC) data.

[0105] As described above, the indication information in the first-level DCI can indicate a second-level DCI of a priority. However, in other cases, the second-level DCI includes multiple parts, and the indication information in the first-level DCI can indicate partial second-level DCI of multiple priorities. It can also indicate data multiplexed with the second-level DCI, and the data can be eMBB data or URLLC data, or other data. Taking the larger the value, the higher the priority as an example, the first-level DCI indicates the second-level DCI part 1, the second-level DCI part 2, the URLLC data, and the corresponding priorities 2, 4, and 8. It can be known that the order of priority is URLLC data>second-level DCI part 2>second-level part part 1.

[0106] The priorities of different types of information can also be pre-configured, as shown in Table 4:

[0107] Table 4

[0108] When priorities for various types of information are preconfigured, the receiving end can obtain the preconfigured priorities in advance. Upon receiving each Level 1 DCI message, it only needs to obtain the information type to derive the corresponding priority from the configured priorities. This eliminates the need for the Level 1 DCI message to indicate the priority corresponding to each information type each time. In other words, the Level 1 DCI can indicate the priority of information either explicitly or implicitly. Specifically, this can be indicated by the correspondence between the information type and the information type in the preconfigured priorities.

[0109] 102. The sender sends information on the target transmission resource based on the type and priority of the information.

[0110] After the transmitter learns the information priority ranking, it can map the information based on this ranking. This mapping process considers both the information priority and the DMRS location and number of symbols it occupies. In general, around the DMRS, higher-priority information is mapped first, followed by lower-priority information. This ensures that high-priority information is transmitted.

[0111] 103. The receiving end receives the first-level DCI, and obtains information on the target transmission resource according to the information type and information priority indicated by the first-level DCI.

[0112] After receiving the first-level DCI, the receiver can use the indication information in the first-level DCI to determine whether the target transmission resource has been sent with second-level DCI of different priorities and whether it includes multiplexed data. Based on this information, the receiver can prioritize high-priority information when obtaining information on the target transmission resource to ensure efficient acquisition of high-priority information.

[0113] It can be seen that in the embodiment of the present application, by adding indication information to the first-level DCI, it is used to clearly indicate the second-level DCI transmitted on the target transmission resource, or also includes the information type of data multiplexed with the second DCI, and their corresponding priorities. And based on their information type and information priority, the information is sent on the target transmission resource, which can ensure the transmission of high-priority information and effectively improve the efficiency of the receiving end in receiving and obtaining information on the target transmission resource.

[0114] In the embodiment of the present application, the target transmission resource indicated by the first-level DCI is used to transmit information, and a DMRS needs to be sent simultaneously so that the receiving end can perform channel estimation based on DMRS demodulation and obtain the transmitted information. In the embodiment of the present application, the DMRS used for channel estimation of the target transmission resource is referred to as a preconfigured DMRS. The distribution of the preconfigured DMRS can be specifically referred to in the relevant description of Figure 4.

[0115] In some cases, if there is a pre-configured DMRS corresponding to the target transmission resource and no additional DMRS exists, the information can be sent in the following three ways:

[0116] (1) Information is sent according to its priority, starting from the target time-frequency position where the first column of DMRS is located, and mapped to the subsequent REs in the order of frequency domain first and time domain second. The first column of DMRS is located in the first symbol of the target transmission resource.

[0117] Information is mapped to subsequent REs in the frequency domain first, then the time domain, starting from the target time-frequency position of the first DMRS column. For details, see Figure 9B, which is a schematic diagram of an information mapping method provided in an embodiment of the present application. As shown in (a) of Figure 9B, the starting position of the pre-configured DMRS is located at the first symbol of the target transmission resource (allocated resource), referred to as the first DMRS column. A square grid consisting of symbols and subcarriers represents an RE. In the transmitted information, if the second-level DCI (2nd DCI) has higher priority than the data, the second-level DCI is mapped first, followed by the data, starting from the target time-frequency position of the first DMRS column. The specific mapping method for information is to map to subsequent REs in the frequency domain first, then the time domain. Specifically, on the same symbol, pre-sequence REs and post-sequence REs are distinguished based on their frequency domain order. For example, RE1 at (symbol 0, subcarrier 1) and RE2 at (symbol 0, subcarrier 3) are the pre-sequence REs of RE2, and RE2 are the post-sequence REs of RE1. After completing the mapping of the REs on the same symbol, mapping is performed on the REs on the next symbol. For example, the subsequent RE for (symbol 0, subcarrier 11) is (symbol 1, subcarrier 0) (when the total number of subcarriers is 12). It should be noted that the terms "pre-order" and "post-order" here simply indicate a sequence and do not imply strict proximity; there can be gaps between them. Once all the information to be transmitted has been mapped to the target transmission resource, the information can be sent.

[0118] In some cases, assuming that when high-priority information is mapped to the last symbol, the remaining information is less than the total number of REs of the current symbol, and can be mapped evenly or continuously. Taking (a) in Figure 9B as an example, it is uniform mapping. Assuming that after the second-level DCI maps symbol 1, the remaining information is 2 REs, it can be evenly mapped on symbol 2, that is, mapped to RE (symbol 2, subcarrier 0) and RE (symbol 2, subcarrier 6). Or as shown in (b) in Figure 9B, it is continuous mapping. That is, the remaining information is mapped to RE (symbol 2, subcarrier 0) and RE (symbol 2, subcarrier 1).

[0119] (2) Information is mapped to the forward REs in the order of frequency domain first and time domain second from the target time-frequency position where the Kth column DMRS is located, according to the information priority, until the front-end resources of the target transmission resources are all occupied, and then is sent in the order of frequency domain first and time domain second from the target time-frequency position. The Kth column DMRS is located at the Kth symbol of the target transmission resource, where K is a positive integer greater than 1.

[0120] In some cases, the starting position of the pre-configured DMRS is not located at the first symbol of the target transmission resource, but at the Kth symbol, which is called the Kth column DMRS, where K is a positive integer greater than 1, such as 2, 3. The mapping method of the information may be to complete the mapping from one direction of the Kth column DMRS and then map it to the RE in the other direction. Please refer to Figure 9C, which is a schematic diagram of another information mapping method provided in an embodiment of the present application. As shown in (a) in Figure 9C, the starting position of the pre-configured DMRS is located at symbol 2, that is, K=3. The highest priority information (the second-level DCI in the figure) is mapped to the forward RE starting from the target time-frequency position where the 3rd column DMRS is located, until symbol 1 and symbol 0 are occupied, and then mapped to the backward RE of the 3rd column DMRS, that is, symbol 3, symbol 4... until all information is mapped.

[0121] (3) Information is mapped from the target time-frequency position where the T-th column DMRS is located to the preceding RE in the order of frequency domain first and time domain second until the mapping of one symbol is completed, and then mapped from the target time-frequency position to the following RE until the mapping of one symbol is completed. The mapping in these two directions is switched until the mapping of the information is completed and sent.

[0122] In other cases, the information can be mapped from the Kth column DMRS to REs in two directions. As shown in (b) of Figure 9C, the starting position of the pre-configured DMRS is at symbol 2, that is, K = 3. Information is mapped to the forward REs starting from the target time-frequency position where the 3rd column DMRS is located in descending order of priority until symbol 1 is occupied, and then mapped to the backward REs at the target time-frequency position where the 3rd column DMRS is located until symbol 3 is occupied. That is, the mapping order of information in the time domain is symbol 2, symbol 1, symbol 3, symbol 0, symbol 4, symbol 5..., or it can also be symbol 2, symbol 3, symbol 1, symbol 4, symbol 0, symbol 5..., until all information is mapped.

[0123] It can be seen that in an embodiment of the present application, when the first-level DCI only includes pre-configured DMRS, information of different priorities can be mapped from the time-frequency position close to the DMRS to the time-frequency position originally away from the DMRS in order of priority from high to low. In this way, information with higher priority can be closer to the DMRS, so when the receiving end demodulates the signal through the DMRS, it can ensure the reliability of obtaining high-priority information.

[0124] In the above embodiments, the transmission process of information on the target transmission resource only uses the pre-configured DMRS for channel estimation. In other cases, additional DMRS can be dynamically added to the target transmission resource, and the first-level DCI is also used to indicate whether additional DMRS exists and the mapping method of the additional DMRS.

[0125] In an embodiment of the present application, additional DMRS may be added to provide the receiving end with more channel demodulation information so as to increase the reliability of information transmission, especially the transmission reliability of high-priority information. The first-level DCI may indicate whether there are additional DMRS, including explicit indication or implicit indication. Explicit indication includes sending indication information, for example, "1" indicates that additional DMRS is included, and "0" indicates that additional DMRS is not included. Implicit indication means that the first-level DCI does not directly send indication information, and the receiving end determines whether additional DMRS is included based on the information obtained. For example, it is determined by the position of the pre-configured DMRS. It is assumed that for the case where no additional DMRS is included, the pre-configured DMRS is located at the first symbol of the target transmission resource, and for the case where additional DMRS is included, the pre-configured DMRS is not located at the first symbol of the target transmission resource. Or it is assumed that whether additional DMRS is included is determined by whether the number of symbols occupied by DMRS exceeds a preset number.

[0126] Optionally, the preconfigured DMRS is located on the first symbol of the target transmission resource, and the additional DMRS is located on the Tth symbol after the preconfigured DMRS on the target transmission resource, where T is a positive integer.

[0127] Please refer to Figure 10A, which is a schematic diagram of an additional DMRS configuration provided in an embodiment of the present application. As shown in (a) in Figure 10A, the target transmission resource indicated by the first-level DCI is the resource on symbols 7 to 12. The preconfigured DMRS is located on the first symbol of the target transmission resource and is called the first column DMRS. As shown in (b) in Figure 10A, the additional DMRS can be located in the next symbol adjacent to the preconfigured DMRS. Or, as shown in (c) in Figure 10A, the additional DMRS can be spaced apart from the preconfigured DMRS by multiple symbols. That is to say, the additional DMRS is located on the Tth symbol after the DMRS, and T can be 1 (indicating that the additional DMRS is adjacent to the preconfigured DMRS in the time domain) or greater than 1 (indicating that there is a time domain interval between the additional DMRS and the preconfigured DMRS).

[0128] Optionally, the first-level DCI is also used to indicate the mapping mode and / or starting position of additional DMRS in the frequency domain.

[0129] The mapping method of DMRS can refer to the mapping density of DMRS. The mapping density of additional DMRS can be the same as or different from the pre-configured DMRS. As shown in (d) in Figure 10A, the density of pre-configured DMRS is 1 / 2, and the density of additional DMRS is 1 / 4. The densities of the two are different. The density of additional DMRS can also be 1 / 2, 1 / 3, 1 / 6, etc. The first-level DCI can also indicate the starting position of the additional DMRS in the frequency domain. For example, the starting position can be 0, 1, 2, 3, 4, 5 (subcarrier number), etc. In (d) in Figure 10A, the frequency domain starting position of the additional DMRS is 0.

[0130] Optionally, the preconfigured DMRS is located on symbols other than the first symbol on the target transmission resource, and the additional DMRS is located on the first symbol of the target transmission resource.

[0131] In some cases, assuming that the preconfigured DMRS is not located on the first symbol of the target transmission resource, the additional DMRS can be located on the first symbol. Please refer to Figure 10B, which is a schematic diagram of another additional DMRS configuration provided in an embodiment of the present application. As shown in (a) in Figure 10B, symbols 0 to 6 are the target transmission resources indicated by the first-level DCI. The preconfigured DMRS is located on symbol 3, and the additional DMRS can be located on symbol 0 (the first symbol of the target transmission resource). Similarly, the density of the additional DMRS can be the same as that of the preconfigured DMRS, as shown in (b) in Figure 10B. It can also be different, as shown in (c) in Figure 10B.

[0132] Optionally, the additional DMRS replaces the pre-configured DMRS, and the mapping manner of the additional DMRS is different from the mapping manner of the configured DMRS.

[0133] In some cases, the preconfigured DMRS cannot meet the decoding requirements of information with multiple priorities, and additional DMRS can be used to replace the preconfigured DMRS. The density of the additional DMRS is different from that of the preconfigured DMRS. Please refer to Figure 10C, which is a schematic diagram of another additional DMRS configuration provided in an embodiment of the present application. As shown in (a) of Figure 10C, symbols 7 to 12 are the target transmission resources indicated by the first-level DCI. The preconfigured DMRS was originally located on symbol 7, but an additional DMRS was configured to replace the preconfigured DMRS. As shown in (b) of Figure 10C, the additional DMRS is also located on symbol 7. The above is the case where the preconfigured DMRS is located on the first symbol of the target transmission resource. When the preconfigured DMRS is not located on the first symbol of the target transmission resource, the additional DMRS can also replace the preconfigured DMRS. As shown in (c) of Figure 10C, the preconfigured DMRS is located on symbol 3, and the additional DMRS replaces the preconfigured DMRS. As shown in (d) of Figure 10C, the additional DMRS is also located on symbol 3. In the figure, the density of the preconfigured DMRS is 1 / 3, and the density of the additional DMRS is 1 / 2. The density of the additional DMRS is different from the density of the preconfigured DMRS and is higher than the latter.

[0134] Optionally, the additional DMRS is located on the Mth symbol where the pre-configured DMRS is originally located, and the pre-configured DMRS is moved backward by R symbols from the Mth symbol, where R is a positive integer.

[0135] In some cases, the symbol where the preconfigured DMRS is located is replaced by an additional DMRS, and the preconfigured DMRS is moved back R symbols. For details, please refer to Figure 10D, which is a schematic diagram of another additional DMRS configuration provided in an embodiment of the present application. As shown in (a) in Figure 10D, symbols 7 to 12 are the target transmission resources indicated by the first-level DCI. The preconfigured DMRS was originally located on the first symbol of the target transmission resource, but as shown in (b) in Figure 10D, the additional DMRS replaced the symbol where the preconfigured DMRS was located, and the preconfigured DMRS moved back one symbol. The same is true for the case where the preconfigured DMRS was not originally located on the first symbol of the target transmission resource. As shown in (c) in Figure 10D, the preconfigured DMRS was originally located on the 4th symbol on the target transmission resource, and in (d) in Figure 10D, the additional DMRS replaced the preconfigured DMRS on the 4th symbol on the target transmission resource, and the preconfigured DMRS moved back to the 5th symbol of the target transmission resource.

[0136] As can be seen, in the embodiment of the present application, since the target transmission resources indicated by the first-level DCI are used to transmit various types of information with multiple priorities, additional DMRS can be added for channel estimation so that the receiving end can obtain more accurate information content based on the additional DMRS demodulation, thereby improving the reliability of the transmission of various types of information.

[0137] The above embodiment describes how to map additional DMRS on target transmission resources. Further, the embodiment of the present application describes how to map and send information on target transmission resources when additional DMRS is included.

[0138] Optionally, the method includes sending information including: the information is sent in a manner of mapping to subsequent resource elements RE in the order of frequency domain first and time domain later, from the target time-frequency position where the first column DMRS is located, according to the priority of the information from high to low, and the first column DMRS is located in the first symbol of the target transmission resource, and is a DMRS with higher frequency domain density among the pre-configured DMRS and the additional DMRS.

[0139] In some cases, the one with higher density between the additional DMRS and the preconfigured DMRS is located on the first symbol of the target transmission resource. Please refer to Figure 11A, which is a schematic diagram of a mapping method of information including additional DMRS provided in an embodiment of the application. As shown in (a) in Figure 11A, the density of the additional DMRS is greater than the density of the preconfigured DMRS, the additional DMRS is located on the first symbol of the target transmission resource, and the preconfigured DMRS is located on symbols other than the first symbol. The first column of DMRS is the additional DMRS, and the information is mapped from the symbol where the additional DMRS is located to the subsequent RE according to the priority from high to low. After the mapping of the high-priority second-level DCI is completed in the figure, the mapping of the low-priority data is performed, until all the information is mapped.

[0140] Alternatively, as shown in (b) of Figure 11A , the density of preconfigured DMRS is greater than the density of additional DMRS. The preconfigured DMRS is located on the first symbol of the target transmission resource, and the additional DMRS is located on symbols other than the first symbol. The first column of DMRS is the preconfigured DMRS. Second-level DCI is mapped from the symbol where the preconfigured DMRS is located to subsequent REs. As shown in the figure, after the second-level DCI is mapped, mapping of lower-priority data is performed until all information is mapped.

[0141] Alternatively, as shown in FIG11B , the information used for transmission of the target transmission resource includes the second-level DCI part 1, the second-level DCI part 2, and the multiplexed data, and the priority is second-level DCI part 1 > (higher than) second-level DCI part 2 > data, and the mapping order of the information is to map the second-level DCI part 1 first, then map the second-level DCI part 2, and finally map the data.

[0142] Optionally, the sending of the information in the method includes:

[0143] (1) Information is mapped from the target time-frequency position where the Kth column DMRS is located to the forward RE in the order of frequency domain first and time domain second according to the priority of the information, until the front-end resources of the target transmission resources are all occupied, and then sent from the target time-frequency position in the order of frequency domain first and time domain second to the backward RE. The Kth column DMRS is located at the Kth symbol of the target transmission resource and is a DMRS with higher frequency domain density among the pre-configured DMRS and the additional DMRS. K is a positive integer greater than 1.

[0144] (2) Information is sent in a manner that, according to the priority of the information, it is mapped from the target time-frequency position where the K-th column DMRS is located, in the order of frequency domain first and time domain later, to the forward RE until the mapping of one symbol is completed, and then mapped from the target time-frequency position to the backward RE until the mapping of one symbol is completed, and the mapping in these two directions is switched until the mapping of the information is completed. The K-th column DMRS is located at the K-th symbol of the target transmission resource and is a DMRS with higher frequency domain density among the pre-configured DMRS and the additional DMRS.

[0145] In some cases, the denser additional DMRS and preconfigured DMRS is not located on the first symbol of the target transmission resource, but rather on the Kth symbol of the target transmission resource, referred to as the Kth column DMRS, where K is a positive integer greater than 1. See Figure 11C , which is a schematic diagram of another information mapping method including additional DMRSs, according to an embodiment of the application. As shown in (a) of Figure 11C , the denser preconfigured DMRS is located on the third symbol of the target transmission resource. Alternatively, as shown in (b) of Figure 11C , the denser additional DMRS is located on the second symbol of the target transmission resource.

[0146] In this case, there are two ways to map information. The first is from back to front. This can be understood in conjunction with Figure 11C. As shown in (a) of Figure 11C, the pre-configured DMRS has a higher density, and the second-level DCI with a higher priority is mapped from symbol 2 where the pre-configured DMRS is located to the pre-sequence DMRS, that is, from symbol 2 to symbol 1, and then to the RE on the pre-sequence symbol 0. After completing the mapping of symbol 0, the remaining information, that is, the data multiplexed with the second-level DCI, is mapped from the symbol where the pre-configured DMRS is located to the post-sequence RE. Or as shown in (b) of Figure 11C, the additional DMRS has a higher density, and the second-level DCI with a higher priority is mapped from symbol 1 where the additional DMRS is located to the RE (pre-sequence RE) on the pre-sequence symbol. After completing the mapping of symbol 0, it is mapped to symbol 2. After completing the mapping of the second-level DCI, the data is mapped starting from symbol 3.

[0147] When the second-level DCI part 1, the second-level DCI part 2, and data are multiplexed together, and the priority order is second-level part 1 > second-level DCI part 2 > data, as shown in Figure 11D , the second-level DCI part 1 is mapped first, starting from symbol 2, then to symbol 1, and then to symbol 0. The second-level DCI part 2 is then mapped, starting from symbol 0, then symbol 3, and then the data is mapped from front to back on the remaining symbols.

[0148] The second type is peripheral mapping. It can be understood in conjunction with Figure 11E. Figure 11E is a schematic diagram of another mapping method including additional DMRS time information provided in an embodiment of the application. As shown in (a) in Figure 11E, the high-priority second-level DCI is mapped first, starting from symbol 2 where the pre-configured DMRS with higher density is located, and then mapping the previous symbol of symbol 2 where the pre-configured DMRS is located, that is, symbol 1, and then mapping the next symbol of symbol 2 where the pre-configured DMRS is located, that is, symbol 3, and then mapping from the first two symbols of symbol 2 where the pre-configured DMRS is located, that is, symbol 0, forward until the first symbol. When the high-priority information is mapped, the low-priority information can be mapped from front to back in the order of frequency first and time later on the remaining resources in Figure 11E (a). After the high-priority second-level DCI is mapped, the low-priority data is mapped backward from the second symbol after symbol 2 where the pre-configured DMRS is located, that is, symbol 4. Until the mapping of all information is completed. Similarly, as shown in (b) of Figure 11E , the higher density is the additional DMRS, and the higher-priority second-level DCI is mapped starting from symbol 1 where the additional DMRS is located, then to the symbol before symbol 1, i.e., symbol 0, and then to the symbol after symbol 1, i.e., symbol 2, until all high-priority information is mapped. Then, low-priority data is mapped from symbol 3 onward.

[0149] When three or more types of information with different priorities are multiplexed together, the highest priority information can be mapped in a surrounding manner, the second highest priority information can also be mapped in a surrounding manner, and the remaining information can be mapped from front to back. Alternatively, only the highest priority information can be mapped in a surrounding manner, and the remaining information can be mapped from front to back.

[0150] For example, when the second-level DCI part 1, the second-level data part 2, and the data are multiplexed together, and the priority is second-level DCI part 1>second-level DCI part 2>data, the information mapping method can be referred to in FIG11F . FIG11F is a schematic diagram of another information mapping method provided in an embodiment of the present application when an additional DMRS is included. As shown in FIG11F , the second-level DCI part 1 is first mapped, starting from symbol 2 where the pre-configured DMRS is located, then to symbol 1, then to symbol 3, and then to symbol 0. The second-level DCI part 2 is then mapped, from symbol 0 to symbol 4. After the second-level DCI part 1 and the second-level data part 2 are mapped, the data is mapped from front to back on the remaining symbols.

[0151] It should be noted that the symbol X described above when mapping information on the target transmission resource carrying DMRS does not necessarily refer to the number of the symbol in a time slot, but may also refer to the number of the symbol on the target time-frequency resource allocated to the second-level DCI. Therefore, symbol X can also be replaced by a symbol numbered X. In addition, it should be understood that the leading RE described in the above embodiment refers to the RE with the symbol sorted in front, and the frequency domain is still mapped in the order from subcarrier 0 to subcarrier 11. For example, for RE11 of (symbol 1, subcarrier 1), RE12 of (symbol 0, subcarrier 0), and RE13 of (symbol 0, subcarrier 1), RE12 is the leading RE of RE11, and RE13 is the leading RE of RE12.

[0152] As can be seen, in the embodiment of the present application, when an additional DMRS is added to the target transmission resource configured by the first-level DCI, information of various priorities is mapped in descending order of priority, starting from the symbol with the higher density of the pre-configured DMRS and the additional DMRS, and moving away from the DMRS until all information is mapped and the information on the target transmission resource is sent. This process can ensure the transmission reliability of high-priority information, thereby improving transmission efficiency.

[0153] FIG12 is a schematic diagram of the structure of a possible communication device provided in an embodiment of the present application. It can be used to implement the information transmission method and specific embodiments described in FIG9A to FIG11F above. As shown in FIG12 , the communication device 1100 includes a transceiver module 1101.

[0154] The transceiver module 1101 is configured to send first-level downlink control information (DCI), where the first-level DCI is used to indicate at least one type of information to be transmitted on a target transmission resource and the priority of the information. The type of information includes second-level DCI or also includes data.

[0155] The transceiver module 1101 is further configured to send information on target transmission resources based on the type and priority of the information.

[0156] Optionally, the priority of the second-level DCI includes: the second-level DCI corresponds to the same priority; or the second-level DCI includes multiple parts corresponding to different priorities.

[0157] Optionally, the data includes enhanced mobile broadband eMBB data, or ultra-reliable low latency communication URLLC data.

[0158] Optionally, there are pre-configured DMRS and additional DMRS corresponding to the data on the target transmission resource, and the first-level DCI is further used to indicate whether there is an additional DMRS and a mapping method of the additional DMRS.

[0159] Optionally, the preconfigured DMRS is located on the first symbol of the target transmission resource, and the additional DMRS is located on the Tth symbol after the preconfigured DMRS on the target transmission resource, where T is a positive integer.

[0160] Optionally, the preconfigured DMRS is located on symbols other than the first symbol on the target transmission resource, and the additional DMRS is located on the first symbol of the target transmission resource.

[0161] Optionally, the additional DMRS replaces the pre-configured DMRS, and the mapping manner of the additional DMRS is different from the mapping manner of the configured DMRS.

[0162] Optionally, the additional DMRS is located on the Mth symbol where the pre-configured DMRS is originally located, and the pre-configured DMRS is moved backward by R symbols from the Mth symbol, where R is a positive integer.

[0163] Optionally, the first-level DCI is also used to indicate the mapping mode and / or starting position of additional DMRS in the frequency domain.

[0164] Optionally, the transceiver module 1101 is specifically used to: information is sent in a manner of mapping to subsequent resource elements RE in the order of frequency domain first and time domain later, from the target time-frequency position where the first column DMRS is located according to the priority of the information from high to low. The first column DMRS is located in the first symbol of the target transmission resource and is a DMRS with higher frequency domain density among the pre-configured DMRS and the additional DMRS.

[0165] Optionally, the transceiver module 1101 is specifically used to: map information to the preceding RE from the target time-frequency position where the Kth column DMRS is located in the order of frequency domain first and time domain later according to the priority of the information, until the front-end resources of the target transmission resources are fully occupied, and then send it from the target time-frequency position in the order of frequency domain first and time domain later. The Kth column DMRS is located at the Kth symbol of the target transmission resource, and is a DMRS with higher frequency domain density among the pre-configured DMRS and the additional DMRS, and K is a positive integer greater than 1.

[0166] Optionally, the transceiver module 1101 is specifically used to: map information to the forward RE in the order of frequency domain first and time domain later from the target time-frequency position where the K-th column DMRS is located according to the priority of the information until the mapping of one symbol is completed, and then map it to the backward RE from the target time-frequency position until the mapping of one symbol is completed, and switch the mapping in these two directions until the mapping of the information is completed. The K-th column DMRS is located at the K-th symbol of the target transmission resource, and is a DMRS with higher frequency domain density among the pre-configured DMRS and the additional DMRS, and K is a positive integer greater than 1.

[0167] Optionally, there is a pre-configured DMRS corresponding to the data on the target transmission resource and there is no additional DMRS. The transceiver module 1101 is specifically used to: send information according to the priority of the information, from the target time-frequency position where the first column DMRS is located, in the order of frequency domain first and time domain later to the subsequent RE, and the first column DMRS is located at the first symbol of the target transmission resource; or according to the priority of the information, map the information from the target time-frequency position where the Kth column DMRS to the forward RE in the order of frequency domain first and time domain later, until the front-end resources of the target transmission resource are all occupied, and then send it from the target time-frequency position in the order of frequency domain first and time domain later; or according to the priority of the information, map the information from the target time-frequency position where the Tth column DMRS is located, in the order of frequency domain first and time domain later to the forward RE until the mapping of one symbol is completed, and then map the information from the target time-frequency position to the subsequent RE until the mapping of one symbol is completed, and switch the mapping in these two directions until the mapping of the information is completed and send it; wherein, the Kth column DMRS is located at the Kth symbol of the target transmission resource, and K is a positive integer greater than 1.

[0168] Optionally, mapping of information on REs includes sequential mapping on each RE, or uniform mapping on REs of each symbol.

[0169] Optionally, the communication device 1100 may further include a processing module 1102 and / or a storage module 1103, which may be used to implement the functions implemented by the base station or terminal device in the information transmission method described in FIG.

[0170] As shown in FIG13 , FIG13 shows a schematic diagram of the hardware structure of a communication device 1200 in an embodiment of the present application. The structure of the communication device 1100 can refer to the structure shown in FIG13 . The communication device 1200 includes: a processor 111 and a transceiver 112, wherein the processor 111 and the transceiver 112 are electrically coupled;

[0171] The processor 111 is configured to execute part or all of the computer program instructions in the memory. When the part or all of the computer program instructions are executed, the device executes the method described in any one of the above embodiments.

[0172] The transceiver 112 is configured to communicate with other devices; for example, a network device sends first information and second information to a terminal, and the terminal receives the first information and second information sent by the network device.

[0173] Optionally, a memory 113 is also included for storing computer program instructions. Optionally, the memory 113 (memory #1) is located within the device, the memory 113 (memory #2) is integrated with the processor 111, or the memory 113 (memory #3) is located outside the device.

[0174] It should be understood that the communication device 1200 shown in FIG13 may be a chip or circuit. For example, the chip or circuit may be provided within a terminal device or a communication device. The transceiver 112 may also be a communication interface. A transceiver includes a receiver and a transmitter. Furthermore, the communication device 1200 may also include a bus system.

[0175] Among them, the processor 111, memory 113, and transceiver 112 are connected via a bus system. The processor 111 is used to execute instructions stored in the memory 113 to control the transceiver to receive and transmit signals, thereby completing the steps of the transmitting end or the receiving end in the implementation method involved in this application. The memory 113 can be integrated into the processor 111 or set separately from the processor 111.

[0176] As an implementation method, the functions of the transceiver 112 can be implemented by a transceiver circuit or a dedicated transceiver chip. The processor 111 can be implemented by a dedicated processing chip, a processing circuit, a processor, or a general-purpose chip. The processor can be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP. The processor can further include a hardware chip or other general-purpose processor. The above-mentioned hardware chip can be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The above-mentioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), and other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc., or any combination thereof. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0177] It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0178] An embodiment of the present application provides a computer storage medium storing a computer program, wherein the computer program includes instructions for executing the method corresponding to the sending end or the receiving end in the above embodiment.

[0179] An embodiment of the present application provides a computer program product including instructions, which, when executed on a computer, enables the computer to execute the method corresponding to the sending end or the receiving end in the above embodiment.

[0180] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0181] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0182] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0183] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0184] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0185] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0186] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0187] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

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