DMRS indication method, network equipment, terminal and storage medium

Abstract

Provided are a demodulation reference signal (DMRS) indication method, a network device, a terminal, and a storage medium, the method comprising: the network device sending first information to the terminal, the first information being at least used for indicating to send a second DMRS for a first time unit in a second time unit, and not sending the first DMRS in the first time unit, the time-frequency resource of the second DMRS is the same as the time-frequency resource of the first DMRS configured on the first time unit; wherein the first time unit is only used for sending data; or the first information is used for indicating the time domain resource of the DMRS added in the third time unit.

Description

Technical Field

[0001] This application relates to the field of wireless communication technologies, and in particular, to a method for indicating a Demodulation Reference Signal (DMRS), a network device, a terminal, and a storage medium. Background Art

[0002] When a user is at the cell edge, the user will receive the downlink signals of both the serving cell and the neighboring cell simultaneously. However, if the downlink signal of the neighboring cell is received, it will affect the signal received by the user's downlink channel, resulting in a large interference in some symbols, making it unusable. In related technologies, if 10 out of 14 symbol resources in a time slot are interfered, and if the remaining 4 symbol resources are not continuous, considering that the DMRS pilot signal occupies at least 1 symbol resource, these 4 symbol resources may not be usable; if the remaining 4 symbol resources are continuous, considering the transmission of the DMRS pilot signal, the symbol resources occupied by the service data will also be reduced. Moreover, even when the number of interfered symbol resources is small, but in a high-speed mobile scenario, the DMRS demodulation method in related technologies still cannot meet the demand for demodulating service data in the current scenario. Summary of the Invention

[0003] In view of this, embodiments of this application are expected to provide a method for indicating DMRS, a network device, a terminal, and a storage medium, which can meet the requirements for demodulating service data in different scenarios.

[0004] The technical solution of the embodiments of this application is implemented as follows:

[0005] In a first aspect, an embodiment of this application provides a method for indicating DMRS, which is applied to a network device. The method includes:

[0006] Sending first information to a terminal, where the first information is at least used to indicate that a second DMRS for a first time unit is sent in a second time unit, the first DMRS is not sent in the first time unit, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured to be sent in the first time unit; where the first time unit is only used for sending data; or, the first information is used to indicate the time-domain resources of the DMRS added in a third time unit.

[0007] In a second aspect, an embodiment of this application provides a method for indicating DMRS, which is applied to a terminal. The method includes:

[0008] Receive the first information sent by a network device, where the first information is at least used to indicate that a second DMRS for a first time unit is sent in a second time unit, the first DMRS is not sent in the first time unit, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured for the first time unit; where the first time unit is only used to send data; or, the first information is used to indicate the time-domain resources of the DMRS added in a third time unit.

[0009] In a third aspect, an embodiment of the present application provides a network device, where the network device includes:

[0010] A sending unit, configured to send first information to a terminal, where the first information is at least used to indicate that a second DMRS for a first time unit is sent in a second time unit, the first DMRS is not sent in the first time unit, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured for the first time unit; where the first time unit is only used to send data; or, the first information is used to indicate the time-domain resources of the DMRS added in a third time unit.

[0011] In a fourth aspect, an embodiment of the present application provides a terminal, where the terminal includes:

[0012] A receiving unit, configured to send first information to a terminal, where the first information is at least used to indicate that a second DMRS for a first time unit is sent in a second time unit, the first DMRS is not sent in the first time unit, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured for the first time unit; where the first time unit is only used to send data; or, the first information is used to indicate the time-domain resources of the DMRS added in a third time unit.

[0013] In a fifth aspect, an embodiment of the present application provides a network device, where the network device includes: a first processor and a first memory; when the first processor executes the running program stored in the first memory, the DMRS indication method on the network device side as described above is implemented.

[0014] In a sixth aspect, an embodiment of the present application provides a terminal, where the terminal includes: a second processor and a second memory; when the second processor executes the running program stored in the second memory, the DMRS indication method on the terminal side as described above is implemented.

[0015] In a seventh aspect, an embodiment of the present application provides a storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the DMRS indication method on the network device side as described above is implemented, or when the computer program is executed by a processor, the DMRS indication method on the terminal side as described above is implemented.

[0016] An embodiment of the present application provides a DMRS indication method, a network device, a terminal, and a storage medium. The method includes: the network device sends first information to the terminal, and the first information is at least used to indicate that a second DMRS for a first time unit is sent in a second time unit, the first DMRS is not sent in the first time unit, and the time-frequency resource of the second DMRS is the same as the time-frequency resource of the first DMRS configured on the first time unit; wherein, the first time unit is only used to send data; or, the first information is used to indicate the time-domain resource of the DMRS added in a third time unit. By adopting the above implementation solution, in the process of demodulating service data, by sending a DMRS signal for demodulating the service data of the first time unit in the second time unit, or by increasing the time-domain resource of the DMRS in the third time unit, when the number of available symbol resources is small, only service data is sent in the first time unit, and the service data of the first time unit is demodulated by using the DMRS sent in the second time unit, or when the number of symbol resources occupied by the interference signal is small, the service data sent in the first time unit can also be demodulated by increasing the DMRS in the first time unit, improving the demodulation efficiency, and when the number of available symbol resources in the first time unit is small, the occupation of the DMRS symbol resources in this time unit can be reduced, improving the spectrum utilization rate, and the requirements for demodulating service data in different scenarios can be met. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the process of a DMRS indication method provided by an embodiment of the present application Figure 1 ;

[0018] Figure 2 Schematic diagram of the process of a DMRS indication method provided by an embodiment of the present application Figure 2 ;

[0019] Figure 3 Schematic diagram of co-frequency interference in the F band;

[0020] Figure 4 Schematic diagram of the process of a DMRS indication method provided by an embodiment of the present application Figure 3 ;

[0021] Figure 5 Schematic diagram of the structure of a network device provided by an embodiment of the present application Figure 1 ;

[0022] Figure 6 Schematic diagram of the structure of a network device provided by an embodiment of the present application Figure 2 ;

[0023] Figure 7 Schematic diagram of the structure of a terminal provided by an embodiment of the present application Figure 1;

[0024] Figure 8 Schematic diagram of a terminal structure provided by an embodiment of the present application Figure 2 。 Detailed implementation manners

[0025] In order to more comprehensively understand the features and technical content of the embodiments of the present application, the technical solutions of the present application will be further elaborated in detail below in conjunction with the accompanying drawings of the specification and specific embodiments. The attached drawings are only for reference and explanation, and are not used to limit the embodiments of the present application.

[0026] Unless otherwise defined, all technical and scientific terms used in the embodiments of the present application have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the embodiments of the present application are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.

[0027] In the following description, reference is made to "some embodiments", which describe a subset of all possible embodiments. However, it can be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict. It should also be noted that the terms "first / second / third" involved in the embodiments of the present application are only used to distinguish similar objects and do not represent a specific order for the objects. It can be understood that "first / second / third" can be interchanged with a specific order or sequence when allowed, so that the embodiments of the present application described here can be implemented in an order other than that illustrated or described here.

[0028] In the related art, when a user is at the edge of a cell, the user will receive the downlink signals of both the serving cell and neighboring cells simultaneously. When receiving the downlink signal of a neighboring cell, it will affect the signal received by the user's downlink channel, and there may be relatively large interference in some symbols, resulting in the inability to use some symbols. When the number of available symbols in the same time slot is small, for example, originally 14 symbols are included in the same time slot, but now 10 symbols are interfered, and only 4 available symbols remain. In the related technical solutions for this problem, one possibility is to still transmit DMRS pilot signals and service data to make full use of all the remaining available symbol resources, and another possibility is to avoid interference through time division, that is, when a certain interference is detected in the symbol resources of the downlink carrier, directly abandon the interfering symbol resources and only use the symbol resources with lower interference intensity.

[0029] However, in the above solutions, the following problems still exist:

[0030] If there are a total of 14 symbol resources in a time slot, and 10 of them are interfered, if the remaining 4 symbol resources are not continuous, considering that the DMRS pilot signal occupies at least 1 symbol resource, the 4 non-interfered symbol resources may also not be available. If the 4 non-interfered symbol resources are continuous, considering the transmission of the DMRS pilot signal, the number of symbol resources available for service data will also decrease.

[0031] To solve the above technical problems, an embodiment of the present application provides a DMRS indication method, which is applied to a network device, such as Figure 1 shown. This method can meet the requirements for demodulating service data in different scenarios. The method may include:

[0032] S101. Determine the first information.

[0033] In the embodiment of the present application, the first information can be determined according to actual needs, and the specific processing process for determining the first information is not limited in the embodiment of the present application.

[0034] S102. Send the first information to the terminal; the first information is at least used to indicate that the second DMRS for the first time unit is sent in the second time unit, the first DMRS is not sent in the first time unit, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured on the first time unit; wherein, the first time unit is only used to send data; or, the first information is used to indicate the time-domain resources of the DMRS added in the third time unit.

[0035] In some embodiments, the terminal may be referred to as a User Equipment (UE). The terminal may be a Personal Communication Service (PCS) phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), etc. The terminal device may also be a smart phone, a tablet computer, a palm computer, a Mobile Station (MS), a Mobile Terminal, etc. The terminal may communicate with one or more network devices via a Radio Access Network (RAN). For example, the terminal may be a mobile phone (or a "cellular" phone) or a computer with a terminal, etc. For example, the terminal may also be a portable, pocket-sized, hand-held, computer-integrated or vehicle-mounted mobile device that exchanges voice and / or data with the radio access network. The terminal may also be a hand-held device with wireless communication capabilities, a computing device, or other processing devices connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future evolved network, etc. The embodiments of the present application are not limited thereto.

[0036] A network device is a device that provides wireless communication functions for terminals, including but not limited to: an evolved Node B (which may be abbreviated as eNB or e-NodeB), a macro base station, a micro base station (which may also be referred to as a "small base station"), a pico base station, a Base Transceiver Station (BTS), a Base Band Unit (BBU), an Access Point (AP), a Transmission Point (TP), or a new generation Node B (gNodeB) in a Long-Term Evolution (LTE) system, a New Radio (NR) system, or a Licensed-Assisted Access using Long-Term Evolution (LAA-LTE) system.

[0037] In the embodiment of the present application, the first time unit represents the current time slot; the second time unit represents the second time slot, and the second time unit is included in the previous time unit or the next time unit of the first time unit, that is, it can be understood that the second time slot can be the previous time slot or the next time slot of the current time slot; the third time unit can be understood as the third time slot, where the first, second, and third are only used to distinguish different time slots.

[0038] In the embodiment of the present application, when there are few available symbol resources in a time slot, the network device sends the first information to the terminal. The first information is used to indicate that the second DMRS is sent in the second time unit, and the first DMRS is not sent in the first time unit, and the second DMRS is used to demodulate the data sent in the first time unit.

[0039] Exemplarily, if there are a total of 14 symbol resources in the first time unit, but 10 of them are occupied, and there are 4 remaining symbol resources, and the DMRS pilot signal occupies one symbol resource, then there are only 3 symbol resources left for service data. In this case where there are few available symbol resources, the network device can send the first information to the terminal. The first information indicates that the first DMRS pilot signal is not sent in the first time unit, and the second DMRS for demodulating the data in the first time unit is sent in the second time unit. Therefore, all 4 remaining symbol resources in the first time unit can be used to send service data, reducing the symbol resource occupancy of the DMRS pilot signal in the first time unit.

[0040] In the embodiment of the present application, in order to ensure that the DRMS sent in the second time unit can demodulate the service data in the first time unit, the time-frequency resources for sending the DMRS in the second time unit need to be configured to be the same as the time-frequency resources of the first DMRS in the first time unit.

[0041] Exemplarily, if a symbol of the second DMRS is sent at the DMRS pos0 position in the second time unit, the frequency domain position of the second DMRS in the second time unit is the same as the frequency domain position of the first DMRS in the Physical Downlink Shared Channel (PDSCH) of the first time unit.

[0042] In the embodiment of the present application, when there are few available symbol resources in the first time unit, the first time unit uses the DMRS sent in the second time unit to demodulate the service data in the first time unit, which can reduce the symbol resource occupancy of the DMRS pilot signal in the first time unit and improve the spectrum utilization rate; and when there are few available symbol resources in the first time unit, the service data is demodulated through the DMRS pilot signal in the adjacent second time unit, reducing the overhead of sending the DMRS in the first time unit.

[0043] In an embodiment of the present application, when there are many available symbol resources in a time slot, but the current terminal is in a high-speed scenario, the network device sends first information to the terminal, and the first information is used to indicate to increase the time-domain resources of DMRS in the third time unit.

[0044] In an embodiment of the present application, when the terminal is in a high-speed scenario, a DMRS pilot signal included in the third time unit may not be able to complete the demodulation of service data quickly. The network device may send first information to the terminal, and the first information may indicate to increase one or more DMRSs in the third time unit and determine the time-domain position of the added DMRS pilot signal in the third time unit.

[0045] Exemplarily, if there are 14 available symbol resources in the third time unit, DMRS occupies one of the symbol resources, and the remaining 13 symbol resources are used to transmit service data. The base station determines that the terminal is currently in a high-speed scenario, and when using the existing one DMRS pilot signal for demodulating service data, it does not meet the current service requirements. At this time, one more DMRS can be added in the third time unit, and the existing DMRS and the newly added DMRS are used together to demodulate the service data in the third time unit, which can improve the demodulation efficiency and meet the service requirements of the terminal in the high-speed scenario.

[0046] It should be noted that the third time unit may include the time unit for which service data is to be demodulated. For example, if it is necessary to demodulate the service data of time unit A, and the symbols of time unit A occupy fewer resources, and the terminal is in a high-speed mobile scenario, then DMRS can be added to time unit A, and the original DMRS and the newly added DMRS are used to demodulate the service data of time unit A.

[0047] It can be understood that in a DMRS indication method provided in an embodiment of the present application, in the process of demodulating service data, by sending a DMRS signal for demodulating the service data of the first time unit in the second time unit, or increasing the time-domain resources of DMRS in the third time unit, when the number of available symbol resources is small, only service data is sent in the first time unit, and the DMRS sent in the second time unit is used to demodulate the service data of the first time unit. Or when the number of symbol resources occupied by the interference signal is small, the service data sent in the first time unit can also be demodulated by adding DMRS in the first time unit, which improves the demodulation efficiency. And when the number of available symbol resources in the first time unit is small, it is possible to reduce the occupation of DMRS symbol resources in this time unit, improve the spectrum utilization rate, and meet the requirements for demodulating service data in different scenarios.

[0048] In an embodiment of the present application, the network device receives second information, where the second information characterizes whether the terminal supports demodulating the data of a time unit by combining DMRS across time units; in the case where the second information characterizes that the terminal supports demodulating the data of a time unit by combining DMRS across time units, the network device sends DMRS configuration information to the terminal.

[0049] In an embodiment of the present application, when implementing the above-mentioned configuration method of the DMRS pilot signal, first, the network device also needs to determine whether the terminal supports demodulating the service data of the current time unit by combining DMRS across time units. The terminal needs to report the second information to the network device, and the network device determines whether the terminal supports demodulating the current time service data by combining DMRS across time units according to the second information sent by the terminal.

[0050] In an embodiment of the present application, for the configuration and demodulation of the DMRS of the innovative service channel proposed for whether the terminal supports, the terminal needs to report the corresponding second information to the network device. When the terminal reports information to the network device, the second information is added to the reported information. For example, the parameter bool PDSCH-DMRS-new Loaded-a is added to the reported information, and the parameter bool PDSCH-DMRS-new Loaded-a indicates whether the terminal has the ability to support demodulating the service data of a time unit by combining DMRS across time units.

[0051] In an embodiment of the present application, if PDSCH-DMRS-new Loaded-a = 1, it represents that the terminal supports demodulating the service data of the current downlink time unit by combining the PDSCH DMRS across time units.

[0052] If PDSCH-DMRS-new Loaded-a = 0, it represents that the terminal does not support demodulating the service data of the current downlink time unit by combining the PDSCH DMRS across time units.

[0053] In an embodiment of the present application, when the second information received by the network device indicates that the terminal supports demodulating the service data of the current time unit by combining DMRS across time units, the network device sends DMRS configuration information to the terminal. For example, if demodulating the service data of the first time unit, the time domain position information of the DMRS can be indicated in the second time unit, etc.

[0054] In an embodiment of the present application, when the second information received by the network device indicates that the terminal does not support demodulating the service data of the current time unit by combining DMRS across time units, the network device does not send the configuration information of the DMRS to the terminal, and the terminal demodulates the service data according to the traditional demodulation configuration method.

[0055] It should be noted that the traditional demodulation configuration method is to demodulate the service data of the current time unit by using the DMRS of the current time unit. Exemplarily, if there are a total of 14 symbol resources in a downlink time unit, and currently there are 10 available symbol resources, and the DMRS pilot signal occupies one symbol resource, then the DMRS in this downlink time unit can be used to demodulate the service data of this downlink time unit.

[0056] In an embodiment of the present application, the network device receives the third information sent by the terminal, where the third information includes interference information associated with the symbols of the first time unit; and uses the third information to determine to demodulate the data of the time unit by combining the DMRS across time units.

[0057] In an embodiment of the present application, the third information includes fourth information, where the fourth information is used to represent the starting symbol of the interference; and fifth information, where the fifth information is used to represent the number of consecutive symbols of the interference.

[0058] In an embodiment of the present application, the interference information associated with the symbols of the first time unit included in the third information may be the starting position of the symbol resource being interfered with and the number of consecutive symbol resources of the symbol resource being interfered with.

[0059] In an embodiment of the present application, the terminal first determines the channel quality of different symbol resources by using the reference signal received through the downlink channel, and adds the fourth information and the fifth information included in the third information through the Physical Uplink Shared Channel (PUSCH) or the Physical Uplink Control Channel (PUCCH), and reports the fourth information and the fifth information to the network device, and the network device may determine the interference situation of the downlink symbol resources of the first time unit based on the fourth information and the fifth information.

[0060] In an embodiment of the present application, the fourth information may be represented as a parameter new_start_symbol, and the parameter new_start_symbol represents the starting symbol resource position of the symbol resource being interfered with in the symbol resource range pointed to by new_lenth_symbol, and the value ranges from 0 to 13.

[0061] The fifth information may be represented as a parameter new_lenth_symbol, and new_lenth_symbol represents the maximum number of consecutive symbol resources with an interference value lower than a certain threshold, and the value ranges from 0 to 14.

[0062] Exemplarily, as shown in Table 1 below, Table 1 represents 14 symbol resources of a certain downlink time unit, and the interference values of the 14 symbol resources detected by the terminal are as follows:

[0063] Table 1

[0064] 0 1 2 3 4 5 6 7 8 9 10 11 12 13 High Low Low High High High Low Low Low Low High Low Low Low

[0065] It can be seen from Table 1 that the fourth information new_start_symbol = 6 and new_lenth_symbol = 4.

[0066] In an embodiment of the present application, when the network device receives the third information sent by the terminal, according to the reported third information, the number of available symbol resources is determined. If the number of available symbol resources is lower than the threshold N, it is determined to use the DMRS across time units to demodulate the service data of the current time unit.

[0067] If the number of available symbol resources is higher than the threshold N, the service data of the current time unit can be demodulated using the traditional demodulation configuration method, or the network device can further determine the application scenario of the terminal and re-determine the demodulation configuration method according to the application scenario.

[0068] In an embodiment of the present application, the network device uses the third information to determine that the interference of the first time unit includes periodic interference; the first information includes at least one of the following:

[0069] The sixth information, which is used to indicate that the second DMRS is sent in the second time unit, and the time-frequency resources of the second DMRS are the same as those of the first DMRS; the seventh information, which is used to indicate the period of sending the second DMRS in the second time unit.

[0070] In an embodiment of the present application, if the terminal supports demodulating the service data of the current time unit in combination with the DMRS across time units, the network device needs to configure the relevant configuration information for demodulating the service data using the DMRS, such as the time domain position of the DMRS in the second time unit.

[0071] In an embodiment of the present application, the network device determines whether the symbol interference information of the first time unit is periodic interference according to the fourth information and the fifth information in the third information reported by the terminal. Specifically, it is determined whether the parameters corresponding to the starting position of the interfered symbol resources and the continuous number of interfered symbols are the same within a period of time to determine whether the interfered symbols are periodic interference. If they are different and the interference is not periodic interference, the traditional demodulation configuration method is used for demodulation; if they are the same and the interference is periodic interference, at least one of the sixth information and the seventh information is included in the first information sent by the network device to the terminal.

[0072] It should be noted that when the network device determines that the interference in the first time unit contains periodic interference based on the third information reported by the terminal, it is also necessary to further determine whether the second time unit (such as the next time unit of the first time unit) is a downlink time unit. If the second time unit is a downlink time unit, at least one of the sixth information and the seventh information included in the first information is sent; if the second time unit is not a downlink time unit, it is configured according to the traditional demodulation configuration method.

[0073] In the embodiments of the present application, the sixth information can be added to the Radio Resource Control (RRC) signaling. The sixth information can be the parameter PDSCH-DMRS-new Loaded-position. The parameter PDSCH-DMRS-new Loaded-position can be used to indicate the position where the second DMRS is sent in the second time unit, and the time-frequency position of the second DMRS is the same as the time-frequency position of the first DMRS in the first time unit. For example, if the first DMRS in the first time unit is at the pos0 position, then the second DMRS in the second time unit is also at the pos0 position.

[0074] In the embodiments of the present application, the seventh information can also be added to the RRC signaling. The seventh information can be the parameter PDSCH-DMRS-new Loaded-period. The parameter PDSCH-DMRS-new Loaded-period can be used to indicate the period when the same situation appears next time according to the interference judgment of the long-time symbol resources. According to this period, the period for sending the DRMS configuration in the second time unit can be determined. For example, according to the interference judgment, it can be determined how many seconds there will be an interference situation, and the network device sends the second DMRS to the second time unit every how many seconds.

[0075] That is to say, if the network device determines that the interference in the first time unit contains periodic interference according to the third information, it can add at least one of the sixth information and the seventh information to the RRC signaling. Adding the sixth information to the RRC signaling, such as the parameter PDSCH-DMRS-new Loaded-position, can use the parameter PDSCH-DMRS-new Loaded-position to indicate the position of sending PDSCH DMRS in the second time unit (such as the next time unit of the first time unit); it can also add the seventh information to the RRC signaling, such as the parameter PDSCH-DMRS-new Loaded-period, and judge according to the long-term interference to use the parameter PDSCH-DMRS-new Loaded-period to indicate the period when the same situation occurs next time, so as to configure periodic DMRS for the terminal supporting the above DMRS configuration. It should be noted that this method can be adapted to scenarios with slow environmental changes or periodic occurrences.

[0076] In the embodiment of the present application, if PDSCH-DMRS-new Loaded-position = 0, it means that PDSCH DMRS is sent in the first time unit (the current time unit); if PDSCH-DMRS-new Loaded-position = 1, it means that PDSCH DMRS is sent in the second time unit, and the PDSCH DMRS information of this downlink time unit is sent at the same time-frequency position as the first DMRS of the first time unit in the second time unit.

[0077] In the embodiment of the present application, when PDSCH-DMRS-new Loaded-position = 1, the following conditions need to be met at the same time:

[0078] (1) The base station does not send the first DMRS in the first time unit, but sends a symbol of DMRS at the DMRS pos0 position in the second time unit, and the DMRS frequency domain position is the same as the resource position in the PDSCH of the first time unit.

[0079] (2) The base station only sends service data information in the first time unit and does not send the first DMRS of PDSCH.

[0080] (3) When the network device (base station) configures the PDSCH DMRS position of other terminals in the second time unit, it needs to pay attention to being orthogonal to the position configured for this terminal.

[0081] (4) The second time unit includes the next downlink time unit of the first time unit and also includes the previous downlink time unit of the first time unit.

[0082] (5) The terminal demodulates by combining the downlink service data information of the first time unit and the second DMRS of the PDSCH in the second time unit received.

[0083] (6) If the second time unit is the next time unit of the first time unit, the terminal needs to save the service data of the first time unit and perform demodulation after receiving the second DMRS of the second time unit; if the second time unit is the previous time unit of the first time unit, the terminal can directly perform interpolation based on the service data of the first time unit.

[0084] In the embodiment of the present application, the parameter PDSCH-DMRS-new Loaded-period can support different time lengths, such as {0ms, 0.5ms, 1ms, 2ms, 2.5ms,...}. If it is equal to 0ms, it is considered not to have periodicity, and if the above DMRS configuration method needs to be configured, it needs to be reconfigured; if it is equal to a non-zero value such as Nms, after considering Nms and other non-zero values, such as 1ms, the above PDSCH DMRS configuration method is configured.

[0085] In an embodiment of the present application, using the third information, it is determined that the interference change in the first time unit includes non-periodic interference; the first information includes at least one of the following:

[0086] The eighth information, which is used to indicate that the first DMRS is not sent in the first time unit;

[0087] The ninth information, which is used to indicate the time-frequency resources of the second DMRS, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured in the first time unit.

[0088] In the embodiment of the present application, the method of using the third information to determine that the interference change in the first time unit includes periodic interference is the same as the method of determining whether the interference change is periodic interference based on the third information in the above embodiment, and will not be elaborated here.

[0089] In an embodiment of the present application, when it is determined, using third information, that the interference change of the first time unit includes periodic interference, it is further determined whether the second time unit (for example, the next time unit of the first time unit) is a downlink time unit. If the second time unit is a downlink time unit, at least one of the sixth information and the seventh information included in the first information is sent. After sending at least one of the sixth information and the seventh information included in the first information, configuration is performed according to the configuration method of the second DMRS. However, it is also necessary to further determine, based on the information reported by the terminal, whether the interference determined by the currently reported information conforms to the current interference pattern, that is, continue to determine the interference pattern based on the reported fourth information and fifth information. If it conforms to the current interference pattern, indicating that the interference pattern has not changed, then configuration and demodulation are performed according to the currently configured DMRS configuration method; if it does not conform to the current interference pattern, indicating that the interference pattern has changed, then the configured second DMRS configuration information needs to be adjusted.

[0090] In an embodiment of the present application, when adjusting the configured second DMRS configuration information, the first information includes at least one of the eighth information and the ninth information.

[0091] In an embodiment of the present application, the eighth information may be Number of DMRS CDM group(s) without data, and the ninth information may be a parameter that can be used to indicate the time domain position of the second DMRS, and the time domain position of the second DMRS is the same as the time domain position of the first DMRS configured on the first time unit.

[0092] In an embodiment of the present application, the value of Number of DMRS CDM group(s) without data is specified in the indication tables Table7.3.1.1.2-6~12 of the extended radio ports (Antenna ports). When Number of DMRS CDM group(s) without data is 0, it means that there is no DMRS in the first time unit, that is, no DMRS is sent in the first time unit; by adding a new parameter in the RRC signaling, this parameter indicates the time domain position of the second DMRS of the PDSCH sent in the second time unit (for example, the next time unit of the first time unit).

[0093] In an embodiment of the present application, if Number of DMRS CDM group(s) without data = 0, it represents that the PDSCH DMRS information of the downlink time unit is sent at the same time-frequency position as the first time unit in the second time unit, and it needs to satisfy the following conditions simultaneously:

[0094] (1) The network device (base station) does not send DMRS in the first time unit, but sends a symbol of the second DMRS at the DMRS pos0 position in the next time unit or the previous time unit of the first time unit. The frequency domain position of the second DMRS is the same as the resource position in the PDSCH of the first time unit.

[0095] (2) The network device (base station) only sends service data information in the first time unit and does not send the first DMRS of the PDSCH.

[0096] (3) The terminal demodulates by combining the received downlink service data information in the first time unit and the second DMRS of the PDSCH in the second time unit.

[0097] (4) When the network device (base station) configures the second DMRS position of the PDSCH in the second time unit for other terminals, it needs to pay attention to being orthogonal to the position of this terminal.

[0098] (5) The second time unit includes the next downlink time unit of the first time unit and also includes the previous downlink time unit of the first time unit.

[0099] (6) If the second time unit is the next time unit of the first time unit, the terminal needs to save the service data of the first time unit and perform demodulation after receiving the second DMRS of the second time unit; if the second time unit is the previous time unit of the first time unit, the terminal can directly perform interpolation based on the service data of the first time unit.

[0100] In the embodiments of this application, as shown in Table 2, Table 2 takes Table 7.3.1.1.2-7 as an example: when the value = 12 - 15, if the Number of DMRS CDM group(s) without data = 0, it is considered that there is no first DMRS of the PDSCH in the first time unit.

[0101] Table 7.3.1.1.2-7: Wireless port (Antenna port(s)), transform precoder is enabled, dmrs-Type = 1, maxLength = 2.

[0102] Table 2

[0103]

[0104]

[0105] If the Number of DMRS CDM group(s) without data = other value, it means that the above PDSCH DMRS configuration method cannot be used, and the demodulation process can be performed according to the traditional configuration.

[0106] In an embodiment of the present application, using the third information, it is determined that the interference change of the first time unit includes non-periodic interference; the first information includes at least one of the following:

[0107] The tenth information, which is used to indicate demodulating the data of the time unit by combining DMRS across time units;

[0108] The eleventh information, which is used to indicate the time-frequency resources of the second DMRS, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured on the first time unit.

[0109] In an embodiment of the present application, when it is determined using the third information that the interference change of the first time unit includes periodic interference, it is further determined whether the second time unit (such as the next time unit of the first time unit) is a downlink time unit. If the second time unit is a downlink time unit, at least one of the sixth information and the seventh information included in the first information is sent. After sending at least one of the sixth information and the seventh information included in the first information, it is configured according to the configuration method of the second DMRS. However, it is further necessary to determine according to the information reported by the terminal whether the interference determined by the currently reported information conforms to the current interference rule. If it conforms to the current interference rule, it is configured and demodulated according to the configuration method of the currently configured DMRS; if it does not conform to the current interference rule, the configured second DMRS configuration information needs to be adjusted.

[0110] In an embodiment of the present application, when adjusting the configured second DMRS configuration information, the first information includes at least one of the tenth information and the eleventh information.

[0111] In an embodiment of the present application, the tenth information can be a new parameter added to the PDCCH. This parameter can be boolPDSCH-DMRS-new Loaded, which indicates whether it is allowed to demodulate the service data of the time unit by combining DMRS across time units, that is, the sent DMRS can be sent in the next time unit of the service data. And the eleventh information indicates the time-frequency resources of the second DMRS, and indicates that the time domain position of the second DMRS is the same as the time domain position of the first DMRS configured on the first time unit.

[0112] It should be noted that the method of configuring DMRS using the tenth information and the eleventh information is applicable to scenarios with large interference variations, and parameter adjustment can be performed in real time.

[0113] In an embodiment of the present application, if PDSCH-DMRS-new Loaded = 1, it indicates that PDSCH DMRS is allowed to be configured in an innovative manner, that is, it is allowed to use DMRS combining across time units to demodulate the data of the time unit.

[0114] In an embodiment of the present application, when PDSCH-DMRS-new Loaded = 1, the following requirements need to be met:

[0115] (1) The network device (base station) does not send the first DMRS in the first time unit, but sends a symbol of the second DMRS at the DMRSpos0 position in the second time unit, and the frequency domain position of the second DMRS is the same as the resource position of the PDSCH in the first time unit.

[0116] (2) The network device (base station) only sends service data information in the first time unit and does not send the first DMRS of the PDSCH.

[0117] (3) The terminal combines the received downlink service data information in the first time unit and the second DMRS of the PDSCH in the second time unit for service data demodulation.

[0118] (4) When the network device (base station) configures the second DMRS position of the PDSCH of other terminals in the second time unit, it needs to pay attention to being orthogonal to the position of the second DMRS of this terminal.

[0119] (5) The second time unit includes the next downlink time unit of the first time unit and also includes the previous downlink time unit of the first time unit.

[0120] (6) If the second time unit is the next time unit of the first time unit, the terminal needs to save the service data of the first time unit and perform demodulation after receiving the second DMRS of the second time unit; if the second time unit is the previous time unit of the first time unit, the terminal can directly perform interpolation based on the service data of the first time unit.

[0121] In an embodiment of the present application, if PDSCH-DMRS-new Loaded = 0, it represents that PDSCH DMRS is not allowed to be configured in an innovative manner, that is, DMRS combining across time units is not used to demodulate the data of the time unit. The terminal sends the first DMRS and service data of the PDSCH in the first time unit according to the traditional configuration method, and the base station can normally demodulate the service data of the first time unit based on the first DMRS.

[0122] In an embodiment of the present application, the first information includes the index of the time-domain resource of the DMRS added in the third time unit, and the network device sends the twelfth information to the terminal, where the twelfth information characterizes at least one time-domain resource of the DRMS added in the third time unit and the corresponding index.

[0123] In an embodiment of the present application, when the network device determines that the symbol resources being interfered are few according to the interference information reported by the UE, it can further determine whether the UE is in a high-speed scenario. If it is not in a high-speed scenario, the traditional DMRS configuration method can be used for configuration and demodulation. If the terminal is in a high-speed scenario, the network device sends the twelfth information to the terminal through RRC signaling. The twelfth information can be the parameter dmrs-AdditionalPosition, and through this parameter, the corresponding relationship between at least one time-domain resource and the corresponding index can be determined.

[0124] In an embodiment of the present application, the index of the time-domain resource of the DMRS added in the third time unit included in the first information can be indicated by the newly added parameter PDSCH-additionalDMRS-new Loaded in the PDCCH. The parameter PDSCH-additionalDMRS-new Loaded represents the actual number of symbols of the additional PDSCH DMRS, and is specifically related to the parameter dmrs-AdditionalPosition of the newly added (additional) DMRS configured through RRC, that is, related to the index of the time-domain resource of the DMRS added in the third time unit included in the first information.

[0125] In an embodiment of the present application, if dmrs-AdditionalPosition = pos1, the additional DMRS is located in symbol #11. At this time:

[0126] PDSCH-additionalDMRS-new Loaded = 000, representing that no additional DMRS is sent;

[0127] PDSCH-additionalDMRS-new Loaded = 001 represents that the additional DMRS is sent in symbol #11.

[0128] It should be noted that when dmrs-AdditionalPosition = pos1, the corresponding relationship between the above at least one time-domain resource and the corresponding index can be determined. For example, when the index is 001, the newly added DMRS is configured to be sent on symbol #11.

[0129] When dmrs-AdditionalPosition = pos2, the additional DMRS is located at symbol #7 and #11. At this time:

[0130] PDSCH-additionalDMRS-new Loaded = 000 indicates that no additional DMRS is sent;

[0131] PDSCH-additionalDMRS-new Loaded = 001 indicates that the additional DMRS is sent at symbol #11;

[0132] PDSCH-additionalDMRS-new Loaded = 010 indicates that the additional DMRS is sent at symbol #7;

[0133] PDSCH-additionalDMRS-new Loaded = 011 indicates that the additional DMRS is sent at symbol #7 and #11.

[0134] When dmrs-AdditionalPosition = pos3, the additional DMRS is located at symbol #5, #8, and #11. At this time:

[0135] PDSCH-additionalDMRS-new Loaded = 000 indicates that no additional DMRS is sent;

[0136] PDSCH-additionalDMRS-new Loaded = 001 indicates that the additional DMRS is sent at symbol #11;

[0137] PDSCH-additionalDMRS-new Loaded = 010 indicates that the additional DMRS is sent at symbol #8;

[0138] PDSCH-additionalDMRS-new Loaded = 100 indicates that the additional DMRS is sent at symbol #5;

[0139] PDSCH-additionalDMRS-new Loaded = 011 indicates that the additional DMRS is sent at symbol #8 and #11;

[0140] PDSCH - additional DMRS - new Loaded = 101 means that additional DMRS is transmitted in symbol #5 and #11;

[0141] PDSCH - additional DMRS - new Loaded = 110 means that additional DMRS is transmitted in symbol #5 and #8;

[0142] PDSCH - additional DMRS - new Loaded = 111 means that additional DMRS is transmitted in symbol #5, #8 and #11.

[0143] In the embodiments of the present application, the corresponding specific values in the above - mentioned embodiments can be as shown in Table 3 below:

[0144] Table 3

[0145]

[0146] Based on the above - mentioned embodiments, the embodiments of the present application further provide a schematic diagram of a DMRS indication process, as Figure 2 shown, and the specific implementation process is as follows:

[0147] 1. The terminal reports the second information, and the second information represents whether the terminal supports demodulating the data of the time unit by using the DMRS across time units.

[0148] 2. The network device (base station) determines whether the terminal supports demodulating the data of the time unit by using the PDSCH in combination with the DMRS across time units according to the second information reported by the terminal. If it does not support, go to 8 and configure it in the traditional way. If it supports, go to 3.

[0149] 3. The network device (base station) receives the third information reported by the terminal and determines whether the third information reported by the UE meets the first threshold. The first threshold is obtained through a large number of tests. The network device (base station) determines the influence of environmental interference on the downlink channel. If the number of available symbols in the downlink time unit is less than N, and the performance of demodulating the service data of the time unit by using the DMRS across time units is better than that of using the DMRS of the time unit in the time unit for demodulating the service data, then the threshold is set to N, that is, if it is determined that the number of available symbols in the downlink time unit is less than N, it is considered that the first threshold for using the DMRS across time units to demodulate the service data of the time unit is reached, and go to 4; if it does not meet the threshold, go to 7.

[0150] 4. The network device (base station) determines whether there is a pattern in the downlink symbol-level interference reported by the terminal. If there is no pattern, it proceeds to 8; if there is a pattern, it proceeds to 5.

[0151] 5. The network device (base station) determines whether the second threshold for using DMRS across time units to demodulate service data of a time unit is reached, that is, it determines that if the second time unit (such as the next time unit after the first time unit) is still a downlink time unit, a symbol of DMRS is sent at the DMRS pos0 position in the second time unit (such as the next time unit after the first time unit), and the DMRS frequency domain position is the same as the resource position of the PDSCH in the first time unit, serving as the pilot signal for demodulating the first time unit. The network device (base station) configures the PDSCH DMRS transmission ports of other terminals to be orthogonal to this position and proceeds to 6; if the next time unit is an uplink time unit, the next downlink time unit is selected as the second time unit. If the distance from the first time unit exceeds X ms (the value of X is obtained through a large number of tests and verified to be empirical data, which can be configured internally by the base station), it is considered that the channel changes greatly and the DMRS pilot signal cannot be shared, that is, it is considered that the second threshold is not met, and it proceeds to 8.

[0152] 6. Configure the sixth information and the seventh information through RRC, and at the same time continue to determine whether the pattern of symbol-level interference reported by the terminal changes. If it does not change, the DMRS configuration remains unchanged; if it changes, the DMRS configuration information is adjusted in a timely manner through DCI, that is, the configuration information of DMRS can be modified by configuring the eighth information and the ninth information through DCI; the configuration information of DMRS can also be modified by configuring the tenth information and the eleventh information through DCI.

[0153] 7. Determine whether the UE is in a high-speed moving scenario. If so, configure additional DMRS through DCI; if it is not in a high-speed moving scenario, configure it in the traditional way.

[0154] 8. Just configure it in the traditional way and end.

[0155] Exemplarily, taking the co-frequency interference at the cell edge in the 2.6G frequency band as an example, according to Figure 3 as shown, Figure 3 it can be found that the UE camps on the serving cell A and can receive the downlink signals of the serving cell A and the neighboring cell B at the same time. The UE judges the interference and reports it, and the base station configures parameters accordingly. Specifically:

[0156] (1) According to the second information reported by the terminal, determine whether the terminal supports demodulating the data of a time unit by combining DMRS across time units. If it supports, proceed to the next step and determine whether to activate the function of configuring the demodulation of the data of a time unit by combining DMRS across time units.

[0157] (2) The UE reports the downlink interference situation, including the fourth information and the fifth information. Within a certain period of time (such as 20 ms), the base station judges the variation law of the fourth information and the fifth information reported by the terminal. If the fifth information is lower than a certain threshold and there is a certain variation law between the fourth information and the fifth information, it judges whether the second threshold is met.

[0158] (3) If the second threshold is met, that is, the second time unit can send the PDSCH DMRS of this terminal, then the sixth information and the seventh information are configured through RRC.

[0159] The embodiment of the present application also provides a DMRS indication method, as Figure 4 shown, which is applied to the terminal. This method may include:

[0160] S401. Receive the first information sent by the network device. The first information is at least used to indicate that the second DMRS for the first time unit is sent in the second time unit, the first DMRS is not sent in the first time unit, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured on the first time unit; wherein, the first time unit is only used to send data; or, the first information is used to indicate the time-domain resources of the DMRS added in the third time unit.

[0161] In the embodiment of the present application, when the number of symbol resources interfered is relatively large, for example, a total of 14 symbol resources, and at least 10 of the 14 symbol resources are interfered, when the terminal demodulates the service data of the first time unit, it can receive the first information sent by the network device. The first information indicates that the second DMRS is sent in the second time unit and the first DMRS is not sent in the first time unit, and the service data sent in the first time unit is demodulated by using the second DMRS.

[0162] It should be noted that to demodulate the service data of the first time unit by using the DMRS of the second time unit, it is necessary to satisfy that the time-frequency position of the second DMRS is the same as that of the first DMRS configured on the first time unit.

[0163] It should be noted that the first time unit is only used to send service data and does not send the first DMRS.

[0164] In the embodiment of the present application, the second time unit may include the previous time unit of the first time unit or the next time unit of the first time unit.

[0165] Exemplarily, if the first time unit is the 2nd s, the second time unit may include the 1st s or the 3rd s. That is, the DMRS sent in the 1st s or the 3rd s can be used to demodulate the service data sent in the 2nd s.

[0166] In an embodiment of the present application, if the number of symbols interfered with by the terminal is small, but the terminal is in a high-speed scenario, when demodulating the service data of the third time unit using the DMRS sent in the third time unit, an ideal effect cannot be achieved, and DMRS can be added to the third time unit.

[0167] For example, the third time unit can be the 2nd second. To demodulate the service data of the 2nd second using the DMRS sent in the 2nd second, if the terminal is currently in a high-speed scenario, then demodulating the service data of the 2nd second using the DMRS sent in the 2nd second at this time may not meet the requirements. One or more DMRS can be newly added in the 2nd second, and the service data of the 2nd second can be demodulated in combination with the DMRS originally sent in the 2nd second.

[0168] S402. Determine the received DMRS based on the first information.

[0169] In an embodiment of the present application, if the first information indicates that the second DMRS for the first time unit is sent in the second time unit, and the time-frequency resource of the second DMRS is the same as the time-frequency resource of the first DMRS configured on the first time unit, then the second DMRS is received at the position where the time-frequency resource of the second time unit is the same as that of the first DMRS; if the first information indicates the time-domain resource of the DMRS added in the third time unit, then the newly added DMRS is received in the third time unit.

[0170] It can be understood that in a DMRS indication method provided in an embodiment of the present application, during the process of demodulating service data, by receiving the DMRS signal for demodulating the service data of the first time unit in the second time unit, or receiving the time-domain resource of the DMRS added in the third time unit, when the available symbol data is small, the service data of the first time unit is demodulated using the DMRS received in the second time unit, and the first time unit only sends service data, or when the number of symbols occupied by the interference signal is small, the service data of the first time unit can also be demodulated by combining the DMRS added in the first time unit with the first DMRS received in the first time unit, improving the demodulation efficiency, and when the number of available symbols in the first time unit is small, the occupation of the DMRS symbol resources of the first time unit can be reduced, improving the spectrum utilization rate, and meeting the requirements for demodulating service data in different scenarios.

[0171] In an embodiment of the present application, the terminal sends second information to the network device, and the second information characterizes whether the terminal supports demodulating the data of the time unit by combining the DMRS across time units.

[0172] In an embodiment of the present application, the precondition for the network device to send the configuration information for the DMRS to demodulate the service data of the first time unit to the terminal is that the terminal needs to first send a second piece of information to the network device, and the second piece of information indicates whether the terminal supports demodulating the data of the time unit by combining the DMRS across time units. If the terminal supports demodulating the data of the time unit by combining the DMRS across time units, the network device further sends the configuration information for demodulating the service data of the first time unit by using the second DMRS to the terminal.

[0173] In an embodiment of the present application, when the terminal reports information to the network device, a second piece of information is added to the reported information. For example, the parameter bool PDSCH-DMRS-new Loaded-a is added to the reported information, and the parameter bool PDSCH-DMRS-new Loaded-a indicates whether the terminal has the ability to support demodulating the service data of the time unit by combining the DMRS across time units.

[0174] In an embodiment of the present application, if PDSCH-DMRS-new Loaded-a = 1, it represents that the terminal supports demodulating the service data of the current downlink time unit by combining the PDSCH DMRS across time units.

[0175] If PDSCH-DMRS-new Loaded-a = 0, it represents that the terminal does not support demodulating the service data of the current downlink time unit by combining the PDSCH DMRS across time units.

[0176] In an embodiment of the present application, when the second piece of information received by the network device indicates that the terminal supports demodulating the service data of the current time unit by combining the DMRS across time units, the network device sends the DMRS configuration information to the terminal; when the second piece of information received by the network device indicates that the terminal does not support demodulating the service data of the current time unit by combining the DMRS across time units, the network device does not send the configuration information of the DMRS to the terminal, and the terminal demodulates the service data according to the traditional demodulation configuration method.

[0177] In an embodiment of the present application, the terminal sends a third piece of information to the network device, and the third piece of information includes interference information associated with the symbols of the first time unit.

[0178] In an embodiment of the present application, the third piece of information includes a fourth piece of information, where the fourth piece of information is used to represent the starting symbol of the interference; and a fifth piece of information, where the fifth piece of information is used to represent the number of consecutive symbols of the interference.

[0179] In an embodiment of the present application, the interference information associated with the symbols of the first time unit included in the third piece of information may be the starting position of the symbol resource of the interference and the number of consecutive symbol resources of the interference.

[0180] In an embodiment of the present application, the terminal first determines the channel quality of different symbol resources by using the reference signals received through the downlink channel, adds the fourth information and the fifth information included in the third information through the Physical Uplink Shared Channel (PUSCH) or the Physical Uplink Control Channel (PUCCH), and reports the fourth information and the fifth information to the network device. The network device may determine the interference situation of the downlink symbol resources of the first time unit based on the fourth information and the fifth information.

[0181] It should be noted that the method for determining the interference situation according to the fourth information and the fifth information can be referred to the above embodiment and will not be elaborated here.

[0182] In an embodiment of the present application, the fourth information may be represented as a parameter new_start_symbol, and the parameter new_start_symbol represents the starting symbol resource position of the interfered symbol resources within the symbol resource range indicated by new_lenth_symbol, and the value ranges from 0 to 13. The fifth information may be represented as a parameter new_lenth_symbol, and new_lenth_symbol represents the maximum number of consecutive symbol resources whose interference value is lower than a certain threshold, and the value ranges from 0 to 14. Specifically, reference can be made to Table 1 shown above.

[0183] In an embodiment of the present application, after the terminal sends the third information to the network device, the network device determines the number of available symbol resources according to the received third information sent by the terminal. If the number of available symbol resources is lower than the threshold N, it is determined to use DMRS across time units to demodulate the service data of the current time unit. If the number of available symbol resources is higher than the threshold N, the service data of the current time unit can be demodulated using the traditional demodulation configuration method, or the network device further determines the application scenario of the terminal and determines the DMRS configuration demodulation method according to the application scenario.

[0184] In an embodiment of the present application, the second DMRS is received by using the first information; the data of the first time unit is demodulated by using the second DMRS.

[0185] In an embodiment of the present application, the first information includes at least one of the following:

[0186] The sixth information, which is used to indicate that the second DMRS is sent in the second time unit, and the time-frequency resources of the second DMRS are the same as those of the first DMRS; the seventh information, which is used to indicate the period of sending the second DMRS in the second time unit.

[0187] In an embodiment of the present application, if the terminal supports demodulating service data of the current time unit by combining DMRS across time units, the network device needs to configure the terminal with relevant configuration information for demodulating service data using DMRS, such as the time domain position of DMRS in the second time unit, etc.

[0188] In an embodiment of the present application, the terminal receives the sixth information added by the network device in the RRC signaling. The sixth information may be the parameter PDSCH-DMRS-new Loaded-position. Using the parameter PDSCH-DMRS-new Loaded-position, the position of sending the second DMRS in the second time unit can be indicated, and the time-frequency position of the second DMRS is the same as that of the first DMRS in the first time unit. For example, if the first DMRS in the first time unit is at the pos0 position, then the second DMRS in the second time unit is also at the pos0 position.

[0189] In an embodiment of the present application, the terminal may also receive the seventh information added by the network device in the RRC signaling. The seventh information may be the parameter PDSCH-DMRS-new Loaded-period. Using the parameter PDSCH-DMRS-new Loaded-period, the period when the same situation occurs next time can be determined based on the interference judgment of long-term symbol resources. According to this period, the period of sending the DRMS configuration in the second time unit can be determined. For example, based on the interference judgment, it is determined how many seconds apart there will be an interference situation, and the network device sends the second DMRS to the second time unit every how many seconds.

[0190] In an embodiment of the present application, using the specific position and other information of the DMRS configured by the sixth information and the seventh information included in the first information, the second DMRS is received, and the service data in the first time unit is demodulated using the second DMRS.

[0191] It should be noted that this method can be adapted to scenarios where the environment changes slowly or appears periodically.

[0192] It should be noted that the conditions that the terminal needs to meet when PDSCH-DMRS-new Loaded-position = 1 can be referred to the above embodiments and will not be elaborated here.

[0193] In an embodiment of the present application, the first information includes at least one of the following:

[0194] The eighth information, which is used to indicate that the first DMRS is not sent in the first time unit;

[0195] The ninth piece of information is used to indicate the time-frequency resources of the second DMRS, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured on the first time unit.

[0196] In an embodiment of this application, the eighth piece of information sent by the network device in the first piece of information received by the terminal may be Number of DMRS CDM group(s)without data, and the ninth piece of information may be a parameter that can be used to indicate the time domain position of the second DMRS, and the time domain position of the second DMRS is the same as that of the first DMRS configured on the first time unit.

[0197] In an embodiment of this application, if Number of DMRS CDM group(s)without data = 0, it represents that the PDSCH DMRS information of the downlink time unit is sent at the same time-frequency position of the second time unit and the first time unit. The terminal can receive the PDSCH DMRS information of the downlink time unit sent by the network device at the same time-frequency position of the second time unit and the first time unit, and demodulate the service data of the second time unit by using this DMRS information.

[0198] It should be noted that the conditions that the network device and the terminal need to meet can be referred to the above embodiments and will not be elaborated here.

[0199] In an embodiment of this application, the first piece of information includes at least one of the following:

[0200] The tenth piece of information is used to indicate that the DMRS combined across time units is used to demodulate the data of the time unit;

[0201] The eleventh piece of information is used to indicate the time-frequency resources of the second DMRS, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured on the first time unit.

[0202] In an embodiment of this application, the tenth piece of information may be a new parameter added to the PDCCH. This parameter may be boolPDSCH-DMRS-new Loaded. Whether to allow the DMRS combined across time units to demodulate the service data of the time is indicated by the parameter bool PDSCH-DMRS-new Loaded, that is, the sent DMRS can be sent in the next time unit of the service data. And the time-frequency resources of the second DMRS are indicated by the eleventh piece of information, indicating that the time domain position of the second DMRS is the same as that of the first DMRS configured on the first time unit.

[0203] In an embodiment of the present application, the terminal can obtain information such as the specific location of the configured second DMRS based on the tenth information and the eleventh information sent by the network device, and demodulate the service data of the first time unit by using the configured second DMRS.

[0204] It should be noted that the configuration method of DMRS using the tenth information and the eleventh information is applicable to scenarios with large interference variations and can adjust parameters in real time.

[0205] In an embodiment of the present application, if PDSCH-DMRS-new Loaded = 1, it indicates that PDSCH DMRS is allowed to be configured in an innovative manner, that is, it is allowed to demodulate the data of the time unit by using DMRS combined across time units. Then the network device can send the second DMRS information to the terminal.

[0206] It should be noted that the conditions that the network device and the terminal need to meet can be referred to the above embodiments and will not be elaborated here.

[0207] In an embodiment of the present application, the first information includes the index of the time domain resource of the DMRS added in the third time unit. The terminal receives the twelfth information sent by the network device, and the twelfth information characterizes at least one time domain resource of the DRMS added in the third unit and the corresponding index; by using the first information and the twelfth information, the time domain resource of the DMRS added in the third time unit is determined.

[0208] In an embodiment of the present application, the first information includes the index of the time domain resource of the DMRS added in the third time unit.

[0209] In an embodiment of the present application, if the terminal is in a high-speed scenario, the terminal receives the twelfth information sent by the network device. The twelfth information can be the parameter dmrs-AdditionalPosition, and through this parameter, the corresponding relationship between at least one time domain resource and the corresponding index can be determined.

[0210] In an embodiment of the present application, the index of the time domain resource of the DMRS added in the third time unit included in the first information can be indicated by the parameter PDSCH-additionalDMRS-new Loaded. The parameter PDSCH-additionalDMRS-newLoaded represents the actual number of symbols of the additional PDSCH DMRS, and is specifically related to the parameter dmrs-AdditionalPosition of the additional DMRS configured by RRC, that is, it is related to the index of the time domain resource of the DMRS added in the third time unit included in the first information.

[0211] In the embodiments of the present application, if dmrs-AdditionalPosition = pos1, the additional DMRS is located in symbol #11. At this time:

[0212] PDSCH-additionalDMRS-new Loaded = 000, indicating that no additional DMRS is sent;

[0213] PDSCH-additionalDMRS-new Loaded = 001 indicates that the additional DMRS is sent in symbol #11, and the terminal receives the additional DMRS at symbol #11.

[0214] If dmrs-AdditionalPosition = pos2, the additional DMRS is located in symbols #7 and #11. At this time:

[0215] PDSCH-additionalDMRS-new Loaded = 000, indicating that no additional DMRS is sent;

[0216] PDSCH-additionalDMRS-new Loaded = 001 indicates that the additional DMRS is sent in symbol #11; the terminal receives the additional DMRS at symbol #11.

[0217] PDSCH-additionalDMRS-new Loaded = 010 indicates that the additional DMRS is sent in symbol #7; the terminal receives the additional DMRS at symbol #7.

[0218] PDSCH-additionalDMRS-new Loaded = 011 indicates that the additional DMRS is sent in symbols #7 and #11, and the terminal receives the additional DMRS at symbols #7 and #11.

[0219] If dmrs-AdditionalPosition = pos3, the additional DMRS is located in symbols #5, #8, and #11. At this time:

[0220] PDSCH-additionalDMRS-new Loaded = 000, indicating that no additional DMRS is sent;

[0221] PDSCH-additionalDMRS-new Loaded = 001 means that additional DMRS is transmitted in symbol #11; the terminal receives additional DMRS at symbol #11.

[0222] PDSCH-additionalDMRS-new Loaded = 010 means that additional DMRS is transmitted in symbol #8; the terminal receives additional DMRS at symbol #8.

[0223] PDSCH-additionalDMRS-new Loaded = 100 means that additional DMRS is transmitted in symbol #5; the terminal receives additional DMRS at symbol #5.

[0224] PDSCH-additionalDMRS-new Loaded = 011 means that additional DMRS is transmitted in symbols #8 and #11; the terminal receives additional DMRS at symbols #8 and #11.

[0225] PDSCH-additionalDMRS-new Loaded = 101 means that additional DMRS is transmitted in symbols #5 and #11; the terminal receives additional DMRS at symbols #5 and #11.

[0226] PDSCH-additionalDMRS-new Loaded = 110 means that additional DMRS is transmitted in symbols #5 and #8; the terminal receives additional DMRS at symbols #5 and #8.

[0227] PDSCH-additionalDMRS-new Loaded = 111 means that additional DMRS is transmitted in symbols #5, #8, and #11, and the terminal receives additional DMRS at symbols #5, #8, and #11.

[0228] Exemplarily, when determining the time-domain resources of the additional DMRS added in the third time unit by using the first information and the twelfth information, if the twelfth information is dmrs-AdditionalPosition = pos1, then there is the following correspondence between the time-domain resources and the indexes:

[0229] When the index is: PDSCH - additionalDMRS - new Loaded = 000, it means that additional DMRS is not sent;

[0230] When the index is: PDSCH - additionalDMRS - new Loaded = 001, the time - domain resource of additional DMRS is symbol #11, then the terminal receives additional DMRS at symbol #11.

[0231] In an embodiment of the present application, the DMRS of the third time unit is received by using the first information; the data of the third time unit is demodulated by using the received DMRS.

[0232] In the embodiment of the present application, the first information is used to indicate the time - domain resource of the DMRS added in the third time unit.

[0233] In the embodiment of the present application, the time - domain resource of additional DMRS determined in the first information is used to configure additional DMRS, and the service data of the third time unit is demodulated by using the DMRS corresponding to the time - domain position of additional DMRS.

[0234] It should be noted that the third time unit receives at least one DMRS sent by the network device, where one or more newly added DMRSs are included, and the service data of the third time unit is demodulated by using at least one DMRS.

[0235] Based on the above - mentioned embodiment, in another embodiment of the present application, a network device 1 is provided, as Figure 5 shown. The network device 1 includes:

[0236] The first determination unit 10 is used to determine the first information.

[0237] The sending unit 11 is used to send the first information to the terminal. The first information is at least used to indicate that the second DMRS for the first time unit is sent in the second time unit, the first DMRS is not sent in the first time unit, and the time - frequency resource of the second DMRS is the same as the time - frequency resource of the first DMRS configured on the first time unit; where the first time unit is only used to send data; or, the first information is used to indicate the time - domain resource of the DMRS added in the third time unit.

[0238] Optionally, the network device may further include: a receiving unit;

[0239] A receiving unit, configured to receive second information, where the second information indicates whether the terminal supports demodulating data of a time unit by combining DMRS across time units.

[0240] The sending unit 11 is further configured to, when the second information indicates that the terminal supports demodulating data of a time unit by combining DMRS across time units, send the DMRS configuration information to the terminal.

[0241] Optionally, the second time unit includes the time unit immediately preceding the first time unit, or the time unit immediately following the first time unit.

[0242] Optionally, the receiving unit is further configured to receive third information sent by the terminal, where the third information includes interference information associated with the symbols of the first time unit.

[0243] The first determining unit 10 is configured to use the third information to determine to demodulate data of a time unit by combining DMRS across time units.

[0244] Optionally, the third information includes:

[0245] Fourth information, where the fourth information is used to indicate the starting symbol of the interference;

[0246] Fifth information, where the fifth information is used to indicate the number of consecutive symbols of the interference.

[0247] Optionally, the first determining unit 10 is further configured to use the third information to determine that the interference of the first time unit includes periodic interference.

[0248] The first information includes at least one of the following:

[0249] Sixth information, where the sixth information is used to indicate that the second DMRS is sent in the second time unit, and the time-frequency resources of the second DMRS are the same as those of the first DMRS;

[0250] Seventh information, where the seventh information is used to indicate the period of sending the second DMRS in the second time unit.

[0251] Optionally, the first determining unit 10 is further configured to use the third information to determine that the interference change of the first time unit includes non-periodic interference.

[0252] The first information includes at least one of the following:

[0253] Eighth information, where the eighth information is used to indicate that the first DMRS is not sent in the first time unit;

[0254] The ninth piece of information, which is used to indicate the time-frequency resources of the second DMRS, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured on the first time unit.

[0255] Optionally, the first determining unit 10 is further configured to use the third piece of information to determine that the interference change of the first time unit includes non-periodic interference.

[0256] The first piece of information includes at least one of the following:

[0257] The tenth piece of information, which is used to indicate that the data of the time unit is demodulated by using the DMRS combining across time units;

[0258] The eleventh piece of information, which is used to indicate the time-frequency resources of the second DMRS, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured on the first time unit.

[0259] Optionally, the first piece of information includes the index of the time-domain resources of the DMRS added in the third time unit.

[0260] The sending unit 11 is further configured to send the twelfth piece of information to the terminal, and the twelfth piece of information characterizes at least one time-domain resource of the DRMS added in the third time unit and the corresponding index.

[0261] An embodiment of the present application provides a network device that sends first information to a terminal. The first information is at least used to indicate that a second DMRS for a first time unit is sent in a second time unit, the first DMRS is not sent in the first time unit, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured on the first time unit; wherein, the first time unit is only used to send data; or, the first information is used to indicate the time-domain resources of the DMRS added in the third time unit. It can be seen that in the process of demodulating service data, the network device proposed in the embodiment of the present application, by sending a DMRS signal for demodulating the service data of the first time unit in the second time unit, or adding the time-domain resources of the DMRS in the third time unit, when the number of available symbol resources is small, only send service data in the first time unit, use the DMRS sent in the second time unit to demodulate the service data of the first time unit, or when the number of symbol resources occupied by the interference signal is small, can also demodulate the service data sent in the first time unit by adding the DMRS in the first time unit, improve the demodulation efficiency, and when the number of available symbol resources in the first time unit is small, can reduce the occupation of the DMRS symbol resources in this time slot, improve the spectrum utilization rate, and can meet the requirements for demodulating service data in different scenarios.

[0262] Figure 6 The following is a schematic structural diagram of a network device 1 provided by an embodiment of the present application. In practical applications, based on the same inventive concept of the above embodiments, as Figure 6 shown, the network device 1 of the embodiment of the present application includes: a first processor 12, a first memory 13, and a first communication bus 14.

[0263] In the process of a specific embodiment, the above-mentioned first determination unit 10, sending unit 11, and receiving unit can be implemented by the first processor 12 located on the network device 1. The above-mentioned first processor 12 can be at least one of an application specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing image processing device (DSPD), a programmable logic image processing device (PLD), a field programmable gate array (FPGA), a CPU, a controller, a microcontroller, and a microprocessor. It can be understood that for different devices, the electronic devices for implementing the above processor functions can also be others, and the embodiments of the present application do not make specific limitations.

[0264] In the embodiment of the present application, the above-mentioned first communication bus 14 is used to implement the connection communication between the first processor 12 and the first memory 13; when the first processor 12 executes the running program stored in the first memory 13, the following DMRS indication method is implemented:

[0265] Send a first piece of information to the terminal, where the first piece of information is at least used to indicate that a second DMRS for a first time unit is sent in a second time unit, and the first DMRS is not sent in the first time unit, and the time-frequency resources of the second DMRS are the same as the time-frequency resources of the first DMRS configured on the first time unit; wherein, the first time unit is only used to send data; or, the first piece of information is used to indicate the time-domain resources of the DMRS added in a third time unit.

[0266] Further, the above-mentioned first processor 12 is further configured to receive a second piece of information, where the second piece of information characterizes whether the terminal supports demodulating data of a time unit by combining DMRS across time units; in the case where the second piece of information characterizes that the terminal supports demodulating data of a time unit by combining DMRS across time units, send the DMRS configuration information to the terminal.

[0267] Further, the second time unit includes the time unit immediately preceding the first time unit or the time unit immediately following the first time unit.

[0268] Further, the first processor 12 is further configured to receive third information sent by the terminal, where the third information includes interference information associated with the symbols of the first time unit; and use the third information to determine to demodulate the data of the time unit by combining DMRS across time units.

[0269] Further, the third information includes:

[0270] Fourth information, where the fourth information is used to characterize the starting symbol of the interference;

[0271] Fifth information, where the fifth information is used to characterize the number of consecutive symbols of the interference.

[0272] Further, the first processor 12 is further configured to use the third information to determine that the interference of the first time unit includes periodic interference; the first information includes at least one of the following:

[0273] Sixth information, where the sixth information is used to indicate that the second DMRS is sent in the second time unit, and the time-frequency resources of the second DMRS are the same as those of the first DMRS;

[0274] Seventh information, where the seventh information is used to indicate the period of sending the second DMRS in the second time unit.

[0275] Further, the first processor 12 is further configured to use the third information to determine that the interference change of the first time unit includes non-periodic interference; the first information includes at least one of the following:

[0276] Eighth information, where the eighth information is used to indicate that the first DMRS is not sent in the first time unit;

[0277] Ninth information, where the ninth information is used to indicate the time-frequency resources of the second DMRS, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured in the first time unit.

[0278] Further, the first processor 12 is further configured to use the third information to determine that the interference change of the first time unit includes non-periodic interference; the first information includes at least one of the following:

[0279] Tenth information, where the tenth information is used to indicate demodulating the data of the time unit by combining DMRS across time units;

[0280] The eleventh piece of information, which is used to indicate the time-frequency resources of the second DMRS, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured on the first time unit.

[0281] Further, the first piece of information includes the index of the time domain resources of the DMRS added in the third time unit.

[0282] Further, the above-mentioned first processor 12 is further configured to send the twelfth piece of information to the terminal, and the twelfth piece of information characterizes at least one time domain resource of the DRMS added in the third time unit and the corresponding index.

[0283] The embodiment of the present application further provides a terminal 2, as Figure 7 shown, this terminal 2 includes:

[0284] A receiving unit 20, configured to receive the first piece of information sent by the network device, where the first piece of information is at least used to indicate that the second DMRS for the first time unit is sent in the second time unit, the first DMRS is not sent in the first time unit, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured on the first time unit; wherein, the first time unit is only used to send data; or, the first piece of information is used to indicate the time domain resources of the DMRS added in the third time unit.

[0285] A second determining unit 21, configured to determine the received DMRS based on the first piece of information.

[0286] Optionally, the terminal may further include: a sending unit;

[0287] The sending unit is configured to send the second piece of information to the network device, and the second piece of information characterizes whether the terminal supports demodulating the data of the time unit by combining the DMRS across time units.

[0288] Optionally, the sending unit is further configured to send the third piece of information to the network device, and the third piece of information includes interference information associated with the symbols of the first time unit.

[0289] Optionally, the terminal may further include: a demodulating unit;

[0290] The receiving unit 20 is further configured to receive the second DMRS by using the first piece of information.

[0291] The demodulating unit is configured to demodulate the data of the first time unit by using the second DMRS.

[0292] Optionally, the receiving unit 20 is further configured to receive the twelfth information sent by the network device, where the twelfth information characterizes at least one time-domain resource of the DRMS added in the third unit and the corresponding index.

[0293] The second determining unit 21 is configured to determine the time-domain resource of the DMRS added in the third time unit by using the first information and the twelfth information.

[0294] Optionally, the receiving unit 20 is further configured to receive the DMRS of the third time unit by using the first information.

[0295] The demodulation unit is further configured to demodulate the data of the third time unit by using the received DMRS of the third time unit.

[0296] An embodiment of the present application provides a terminal that receives the first information sent by a network device. The first information is at least used to indicate that a second DMRS for the first time unit is sent in the second time unit, the first DMRS is not sent in the first time unit, and the time-frequency resource of the second DMRS is the same as the time-frequency resource of the first DMRS configured on the first time unit; where the first time unit is only used to send data; or, the first information is used to indicate the time-domain resource of the DMRS added in the third time unit. It can be seen that in the process of demodulating service data, the terminal proposed in the embodiment of the present application receives the DMRS signal for demodulating the service data of the first time unit in the second time unit, or receives the time-domain resource of the DMRS added in the third time unit. When the available symbol data is small, the service data of the first time unit is demodulated by using the DMRS received in the second time unit, and the first time unit only sends service data. Or when the number of symbols occupied by the interference signal is small, the service data of the first time unit can also be demodulated by combining the DMRS added in the first time unit with the first DMRS received in the first time unit, improving the demodulation efficiency. And when the number of available symbols in the first time unit is small, the occupation of the DMRS symbol resources of the first time unit can be reduced, improving the spectrum utilization rate, and meeting the requirements for demodulating service data in different scenarios.

[0297] Figure 8 FIG. is a schematic structural diagram of a terminal 2 provided by an embodiment of the present application. In practical applications, based on the same inventive concept of the above embodiment, as Figure 8 shown, the terminal 2 of the embodiment of the present application includes: a second processor 22, a second memory 23, and a second communication bus 24.

[0298] In the process of a specific embodiment, the above-mentioned receiving unit 20, second determining unit 21, sending unit, and demodulating unit can be implemented by a second processor 22 located on the terminal 2. The second processor 22 can be at least one of an ASIC, DSP, DSPD, PLD, FPGA, CPU, controller, microcontroller, and microprocessor. It can be understood that for different devices, the electronic devices for implementing the functions of the above-mentioned processor can also be others, and the embodiments of the present application do not make specific limitations.

[0299] In the embodiments of the present application, the above-mentioned second communication bus 24 is used to implement the connection and communication between the second processor 22 and the second memory 23; when the second processor 22 executes the running program stored in the second memory 23, the following DMRS indication method is implemented:

[0300] Receive the first information sent by the network device. The first information is at least used to indicate that a second DMRS for a first time unit is sent in a second time unit, and a first DMRS is not sent in the first time unit, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured on the first time unit; wherein, the first time unit is only used to send data; or, the first information is used to indicate the time-domain resources of the DMRS added in a third time unit.

[0301] Further, the above-mentioned second processor 22 is further used to send second information to the network device, and the second information characterizes whether the terminal supports demodulating the data of the time unit by combining the DMRS across time units.

[0302] Further, the above-mentioned second processor 22 is further used to send third information to the network device, and the third information includes interference information associated with the symbols of the first time unit.

[0303] Further, the above-mentioned second processor 22 is further used to receive the second DMRS by using the first information; and demodulate the data of the first time unit by using the second DMRS.

[0304] Further, the above-mentioned second processor 22 is further used to receive the twelfth information sent by the network device. The twelfth information characterizes at least one time-domain resource and the corresponding index of the DRMS added in the third unit; and determine the time-domain resources of the DMRS added in the third time unit by using the first information and the twelfth information.

[0305] Further, the above-mentioned second processor 22 is further used to receive the DMRS of the third time unit by using the first information; and demodulate the data of the third time unit by using the received DMRS of the third time unit.

[0306] An embodiment of the present application provides a storage medium, on which a computer program is stored. The above computer-readable storage medium stores one or more programs, and the one or more programs can be executed by one or more processors, and are applied to a network device and / or a terminal. The computer program implements the DMRS indication method as described above.

[0307] It should be noted that, in the embodiments of the present application, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or device including the element.

[0308] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment method can be implemented by means of software plus a necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the embodiments of the present application, in essence, or the part that contributes to the related technology, can be embodied in the form of a software product. The computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disc), and includes several instructions for causing an image display device (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in the various embodiments of the present application.

[0309] The above is only a preferred embodiment of the present application, and is not intended to limit the protection scope of the present application.

Claims

1. A demodulation reference signal DMRS indication method, characterized in that Applied to a network device, the method includes: Sending first information to a terminal, where the first information is at least used to indicate that a second DMRS for a first time unit is sent in a second time unit, the first DMRS is not sent in the first time unit, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured for the first time unit; wherein, the first time unit is only used to send data; or, the first information is used to indicate the time-domain resources of the DMRS added in a third time unit.

2. The method according to claim 1, wherein The method further includes: Receiving second information, where the second information characterizes whether the terminal supports demodulating data of a time unit by combining DMRS across time units; When the second information characterizes that the terminal supports demodulating data of a time unit by combining DMRS across time units, sending the DMRS configuration information to the terminal.

3. The method according to claim 1, wherein The second time unit includes the time unit immediately preceding the first time unit or the time unit immediately following the first time unit.

4. The method according to any one of claims 1 to 3, characterized in that The method further includes: Receiving third information sent by the terminal, where the third information includes interference information associated with the symbols of the first time unit; Using the third information to determine to demodulate the data of the time unit by combining DMRS across time units.

5. The method according to claim 4, wherein The third information includes: Fourth information, where the fourth information is used to characterize the starting symbol of the interference; Fifth information, where the fifth information is used to characterize the number of consecutive symbols of the interference.

6. The method according to claim 4, wherein The method further includes: Using the third information to determine that the interference of the first time unit includes periodic interference; The first information includes at least one of the following: Sixth information, where the sixth information is used to indicate that the second DMRS is sent in the second time unit, and the time-frequency resources of the second DMRS are the same as those of the first DMRS; Seventh information, where the seventh information is used to indicate the period of sending the second DMRS in the second time unit.

7. The method according to claim 4, wherein The method further includes: Using the third information to determine that the interference change of the first time unit includes non-periodic interference; The first information includes at least one of the following: Eighth information, where the eighth information is used to indicate that the first DMRS is not sent in the first time unit; Ninth information, where the ninth information is used to indicate the time-frequency resources of the second DMRS, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured for the first time unit.

8. The method according to claim 4, wherein The method further includes: Using the third information to determine that the interference change of the first time unit includes non-periodic interference; The first information includes at least one of the following: Tenth information, where the tenth information is used to indicate demodulating the data of the time unit by combining DMRS across time units; Eleventh information, where the eleventh information is used to indicate the time-frequency resources of the second DMRS, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured for the first time unit.

9. The method according to claim 1, characterized in that The first information includes the index of the time-domain resources of the DMRS added in the third time unit, and the method further includes: Sending twelfth information to the terminal, where the twelfth information characterizes at least one time-domain resource of the DRMS added in the third time unit and the corresponding index.

10. A DMRS indication method, characterized in that, Applied to a terminal, the method includes: Receiving first information sent by a network device, where the first information is at least used to indicate that a second DMRS for a first time unit is sent in a second time unit, the first DMRS is not sent in the first time unit, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured on the first time unit; wherein, the first time unit is only used for sending data; or, the first information is used to indicate the time-domain resources of the DMRS added in the third time unit.

11. The method according to claim 10, wherein The method further includes: Sending second information to the network device, where the second information characterizes whether the terminal supports demodulating the data of the time unit by combining the DMRS across time units.

12. The method according to claim 10, characterized in that, The method further includes: Sending third information to the network device, where the third information includes interference information associated with the symbols of the first time unit.

13. The method according to any one of claims 10 to 12, characterized in that The method further includes: Receiving the second DMRS by using the first information; Demodulating the data of the first time unit by using the second DMRS.

14. The method according to claim 10, wherein The first information includes the index of the time-domain resources of the DMRS added in the third time unit, and the method further includes: Receiving the twelfth information sent by the network device, where the twelfth information characterizes at least one time-domain resource of the DRMS added in the third unit and the corresponding index; Determining the time-domain resources of the DMRS added in the third time unit by using the first information and the twelfth information.

15. The method according to claim 10 or 14, characterized in that The method further includes: Receiving the DMRS of the third time unit by using the first information; Demodulating the data of the third time unit by using the received DMRS of the third time unit.

16. A network device, characterized in that, The network device includes: A sending unit, configured to send first information to a terminal, where the first information is at least used to indicate that a second DMRS for a first time unit is sent in a second time unit, the first DMRS is not sent in the first time unit, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured on the first time unit; wherein, the first time unit is only used for sending data; or, the first information is used to indicate the time-domain resources of the DMRS added in the third time unit.

17. A terminal, characterized in that, The terminal includes: A receiving unit, configured to send first information to a terminal, where the first information is at least used to indicate that a second DMRS for a first time unit is sent in a second time unit, the first DMRS is not sent in the first time unit, and the time-frequency resources of the second DMRS are the same as those of the first DMRS configured on the first time unit; wherein, the first time unit is only used for sending data; or, the first information is used to indicate the time-domain resources of the DMRS added in the third time unit.

18. A network device, characterized in that, The network device includes: a first processor and a first memory; when the first processor executes the running program stored in the first memory, the method described in any one of claims 1 to 9 is implemented.

19. A terminal, characterized in that, The terminal includes: a second processor and a second memory; when the second processor executes the running program stored in the second memory, the method described in any one of claims 10 to 15 is implemented.

20. A storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, the method described in any one of claims 1 to 9 is implemented, or when the computer program is executed by a processor, the method described in any one of claims 10 to 15 is implemented.

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