Method and communication device for transmitting DMRS

Abstract

The present application provides a method and communication device for transmitting DMRS, the method comprising: the communication device determines the current mode of the resource scheduling unit, the current mode includes a frequency hopping mode or an aggregation mode, the frequency hopping mode indicates that a part of the symbols in a resource scheduling unit are located in the first frequency band, and another part of the symbols are located in the second frequency band, and the aggregation mode indicates that multiple resource scheduling units are aggregated for transmission; the communication device uses the DMRS pattern corresponding to the current mode to map or demap the DMRS, wherein the symbol position occupied by the DMRS in the DMRS pattern corresponding to the current mode is different from the symbol position occupied by the DMRS in the preset DMRS pattern. The embodiment of the present application can flexibly select the symbol position occupied by the DMRS according to different modes, and thus the embodiment of the present application can meet the requirements of different modes and improve network performance.

Description

Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a method and a communication device for transmitting a DMRS. Background Art

[0002] In existing communication systems, when data is transmitted, a transmitting device (for example, a terminal device during uplink transmission and a network device during downlink transmission) needs to send a demodulation reference signal (DMRS) so that a receiving device (for example, a network device during uplink transmission and a terminal device during downlink transmission) can demodulate the data according to the DMRS.

[0003] Typically, the transmitting device sends DMRS according to a preset DMRS pattern. For example, in a long term evolution (LTE) system, for example, for a normal cyclic prefix, the DMRS used for demodulation of the physical uplink shared channel (PUSCH) usually occupies the 4th symbol and the 11th symbol of the resource scheduling unit. For another example, in a new radio (NR) system, there is a demand for fast feedback. Therefore, in the NR system, in the DMRS pattern, the DMRS occupies the front symbol of the source scheduling unit.

[0004] The resource scheduling unit in the new radio (NR) system can be flexibly changed to different modes according to different scenarios. For example, it can be a frequency hopping mode, that is, frequency hopping transmission within the resource scheduling unit, or it can be an aggregation mode, that is, aggregation transmission of multiple resource scheduling units.

[0005] However, when the mode of the resource scheduling unit changes, if the DMRS is still sent in a fixed manner according to the preset DMRS pattern, it will cause adverse effects such as waste of DMRS resources or poor demodulation performance at the receiving end, affecting network performance. Summary of the invention

[0006] The present application provides a method and communication device for transmitting DMRS, which can improve network performance.

[0007] In a first aspect, a method for transmitting a DMRS is provided, the method comprising:

[0008] The communication device determines a current mode of a resource scheduling unit, the current mode includes a frequency hopping mode or an aggregation mode, the frequency hopping mode indicates that a part of symbols in a resource scheduling unit are located in a first frequency band, and another part of symbols are located in a second frequency band, and the aggregation mode indicates that multiple resource scheduling units are aggregated for transmission; the communication device uses a DMRS pattern corresponding to the current mode to perform DMRS mapping or demapping, wherein the symbol position occupied by the DMRS in the DMRS pattern corresponding to the current mode is different from the symbol position occupied by the DMRS in a preset DMRS pattern.

[0009] It should be understood that the method can be executed by a communication device, which can be a network device or a terminal device.

[0010] It should be understood that in the embodiments of the present application, the symbol represents a time unit, and the symbol in this article can also be called an OFDM symbol, but the embodiments of the present application are not limited to this.

[0011] It should also be understood that in an embodiment of the present application, a resource unit may include n symbols, where n is an integer greater than or equal to 2, for example, n is 7, 14 or any value between 2 and 13, and the embodiment of the present application is not limited to this.

[0012] It should be understood that in the embodiment of the present application, the DMRS pattern can also be referred to as DMRS distribution information or DMRS attributes. The DMRS pattern can represent the symbol positions and the number of symbols occupied by the DMRS, but the embodiment of the present application is not limited thereto.

[0013] It should be understood that when the communication device sends data, DMRS mapping is performed according to the DMRS pattern corresponding to the current mode, and when the communication device receives data, DMRS demapping is performed according to the DMRS pattern corresponding to the current mode.

[0014] For example, the communication device is a network device, and when performing uplink transmission, the communication device uses the DMRS pattern corresponding to the current mode to demap the DMRS; when performing downlink transmission, the communication device uses the DMRS pattern corresponding to the current mode to map the DMRS. For another example, the communication device is a terminal device, and when performing uplink transmission, the communication device uses the DMRS pattern corresponding to the current mode to map the DMRS, and when performing downlink transmission, the communication device uses the DMRS pattern corresponding to the current mode to demap the DMRS.

[0015] It should be understood that in the embodiment of the present application, the preset DMRS pattern may also be referred to as a predefined pattern, a default pattern or a first DMRS pattern, and the DMRS pattern corresponding to the current mode may also be referred to as a second DMRS pattern. In the embodiment of the present application, the preset DMRS pattern represents the DMRS pattern used in the first mode (i.e., non-frequency hopping and non-aggregation mode).

[0016] In the prior art, regardless of the transmission mode, a preset DMRS pattern is used for communication, that is, the symbol position occupied by the DMRS is the same as the symbol position occupied by the DMRS in the preset DMRS pattern. However, in some application scenarios, when the mode of the resource scheduling unit changes, if the DMRS is still sent in the existing fixed transmission DMRS manner, since the distribution mode of the DMRS in the preset DMRS pattern is difficult to meet the needs of different modes, it will cause a waste of DMRS resources or cause poor demodulation performance at the receiving end and other adverse effects, affecting network performance.

[0017] However, the DMRS patterns in different modes in the embodiments of the present application are different from the preset patterns. The embodiments of the present application can flexibly select the symbol positions occupied by the DMRS according to different modes, and thus the embodiments of the present application can meet the requirements of different modes and improve network performance.

[0018] When the communication device is a network device, the network device may determine the current mode according to multiple ways.

[0019] Optionally, the network device may determine the current mode based on the channel state information reported by the terminal device and the network state of the cell.

[0020] Optionally, the network device may determine the current mode according to the waveform used by the terminal device, such as a single carrier or multiple carriers. For example, when the terminal device uses a single carrier, the current mode may be a frequency hopping mode, and when the terminal device uses multiple carriers, the current mode may be an aggregation mode. The embodiments of the present application are not limited thereto, for example, when the terminal device uses a single carrier, the current mode may also be an aggregation mode.

[0021] Optionally, the network device may determine the current mode according to the service type, wherein the service type may include a service requiring fast demodulation or a service requiring high transmission performance.

[0022] Optionally, the network device may determine the current mode according to the indication information sent by the terminal device, that is, the terminal device may determine the current mode according to the current state, for example, the network state or the service state, and then the terminal device indicates the current mode to the network device. In this case, the terminal device sends the indication information to the network device so that the network device determines the current mode according to the indication information sent by the terminal device.

[0023] Optionally, as an implementation manner of the first aspect, the communication device is a network device, and the method further includes: the communication device sends first indication information to the terminal device, and the first indication information is used by the terminal device to determine a current mode of the resource scheduling unit.

[0024] Optionally, as an implementation manner of the first aspect, the communication device is a network device, and the method further includes: the communication device sends second indication information to the terminal device, and the second indication information is used to indicate a DMRS pattern corresponding to the current mode.

[0025] When the communication device is a terminal device, the terminal device may determine the current mode in a variety of ways.

[0026] Optionally, the terminal device may determine the current mode according to the indication of the network device. Specifically, the terminal device may receive first indication information sent by the network device, and the first indication information is used by the terminal device to determine the current mode. After the terminal device obtains the first indication information, the current mode of the resource scheduling unit may be determined according to the first indication information.

[0027] It should be understood that the first indication information can directly indicate that the current mode is an aggregation mode or a frequency hopping mode. Optionally, the first indication information can indirectly indicate the current mode. For example, the first indication information indicates the length of the resource scheduling unit, and the terminal device can determine the current mode according to the length of the resource scheduling unit; for another example, the first indication information indicates the current service type, and the terminal device determines the current mode according to the service type. The embodiments of the present application are not limited to this.

[0028] It should be understood that the network device can send the first indication information to the terminal device through various signaling, such as downlink control information (DCI), radio resource control (RRC) signaling, media access control (MAC) layer control element (CE), etc., and the embodiments of the present application are not limited to this.

[0029] Optionally, as an implementation manner of the first aspect, the communication device is a terminal device, and the method also includes: the communication device receives first indication information sent by a network device, and the first indication information is used by the terminal device to determine a current mode of a resource scheduling unit; wherein, the communication device determines the current mode of the resource scheduling unit, including: the communication device determines the current mode based on the first indication information.

[0030] Optionally, as an implementation manner of the first aspect, the communication device is a terminal device, and the method further includes: the communication device receives second indication information sent by the network device, and the second indication information is used to indicate a DMRS pattern corresponding to the current mode.

[0031] It should be understood that the network device can send the second indication information to the terminal device through various signaling, such as DCI, RRC signaling, MAC CE, etc., and the embodiments of the present application are not limited to this.

[0032] Specifically, since the network device and the terminal device need to determine the DMRS pattern when performing data transmission, the network device notifies the terminal device of the DMRS pattern used when performing data transmission with the terminal device. The terminal device can determine the time-frequency resource position of the DMRS based on the DMRS pattern, and then perform DMRS mapping or demapping.

[0033] Optionally, the terminal device may determine the current mode according to the current state. For example, the terminal device determines the current mode according to the network state or the service state, and then the terminal device indicates the current mode to the network device.

[0034] Optionally, as an implementation method of the first aspect, the current mode is a frequency hopping mode, and the DMRS in the preset DMRS pattern occupies N consecutive symbols in a resource scheduling unit that is not frequency hopping, where N is an integer greater than or equal to 1; the DMRS in the DMRS pattern corresponding to the current mode occupies N1 consecutive symbols in the first frequency band, and N2 consecutive symbols in the second frequency band, where N1 is an integer greater than or equal to 1, and N2 is an integer greater than or equal to 1.

[0035] In an embodiment of the present application, in the frequency hopping mode, since the channel states of the two frequency bands are different, in an embodiment of the present application, DMRS is transmitted in each frequency band, so that the receiving end can demodulate the corresponding data according to the DMRS in each frequency band, which can improve the accuracy of data demodulation and enhance the demodulation performance.

[0036] Optionally, as an implementation manner of the first aspect, N1=N2, and positions of the N1 symbols in the first frequency band are symmetrical to positions of the N2 symbols in the second frequency band.

[0037] Therefore, in the embodiment of the present application, the symmetrical setting of DMRS in the two frequency bands enables the receiving device to use the same method to perform data demodulation in the two frequency bands, which can reduce the complexity of demodulation and improve network performance.

[0038] Optionally, as an implementation manner of the first aspect, the N2 symbols include the first symbol in the second frequency band.

[0039] Since the receiving device can demodulate data only after acquiring DMRS, the embodiment of the present application sets DMRS to occupy the first symbol in the second frequency band, so that the receiving end can first acquire the DMRS, thereby realizing fast demodulation of data.

[0040] It should be understood that the N2 symbol positions may also be any position in the second frequency band, and the embodiments of the present application are not limited to this.

[0041] For example, the N2 symbol positions are located in the first half of the second frequency band, or the first symbol of the N2 symbols is located in the first half of the second frequency band. For example, N2=2, the two symbols can be the second and third symbols of the second frequency band, or the third and fourth symbols. The embodiments of the present application are not limited to this.

[0042] Optionally, as an implementation manner of the first aspect, the N1 symbols include the first symbol in a first area in the first frequency band, and the first area is a symbol occupied by data and DMRS.

[0043] It should be understood that, in the present application, the first region includes symbols in the resource scheduling unit used to carry data and DMRS.

[0044] Setting N1 to the first symbol in the first region enables fast demodulation.

[0045] Optionally, as an implementation manner of the first aspect, N1=N2=1, or N1=N2=2.

[0046] That is to say, each segment is one symbol or two, but the embodiment of the present application is not limited to this. One segment may occupy one symbol and the other segment may occupy two symbols.

[0047] Optionally, as an implementation method of the first aspect, the current mode is a resource hopping mode, and the DMRS in the preset DMRS pattern occupies M consecutive symbols and K consecutive symbols in a non-frequency hopping resource scheduling unit, wherein the M symbols are not adjacent to the K symbols; the DMRS in the DMRS pattern corresponding to the current mode occupies M1 consecutive symbols and K1 consecutive symbols in the symbols of the first frequency band, and M2 consecutive symbols and K2 consecutive symbols in the second frequency band, wherein the M1 symbol is not adjacent to the K1 symbol, and the M2 symbol is not adjacent to the K2 symbol, and M, K, M1, K1, M2, K2 are integers greater than or equal to 1.

[0048] It should be understood that the M symbols are located before the K symbols, the M1 symbol is located before the K1 symbol, and the M2 symbol is located before the K2 symbol.

[0049] Optionally, as an implementation manner of the first aspect, the K1 symbols include the penultimate symbol, the penultimate symbol, or the penultimate symbol in the first frequency band.

[0050] Setting the K1 symbols in the second half of the first frequency band enables the receiving end to better demodulate data and improve system performance.

[0051] Optionally, as an implementation manner of the first aspect, the M1 symbols include a first symbol in a first area in the first frequency band, and the first area includes symbols occupied by data and DMRS.

[0052] The M1 symbols include the first symbol in the first region of the second frequency band, which enables fast demodulation.

[0053] Optionally, as an implementation manner of the first aspect, the M2 symbols include the first symbol in the second frequency band.

[0054] Optionally, as an implementation method of the first aspect, M1=M, the M1 symbols are in the same position as the M symbols, the K1 symbols include the last symbol in the first frequency band, the M2 symbols include the first symbol in the first frequency band, K2=K, the k2 symbols are in the same position as the K symbols, or the K2 symbol positions are preset positions.

[0055] Optionally, as an implementation manner of the first aspect, M1=M, the positions of the M1 symbols are the same as those of the M symbols,

[0056] The K1 symbols include the 7th symbol in the entire resource scheduling unit, the entire resource scheduling unit includes the sum of symbols occupied by the first frequency band and the second frequency band, and the entire resource scheduling unit includes 14 symbols,

[0057] The M2 symbol includes the 8th symbol in the entire resource scheduling unit,

[0058] K2=K, the K2 symbol is at the same position as the K symbols, or the K2 symbol positions are preset positions.

[0059] In the embodiment of the present application, in the frequency hopping mode, by transmitting two groups of DMRS in both frequency bands, it is possible to ensure accurate demodulation of data when the channel state fluctuates greatly.

[0060] Optionally, as an implementation manner of the first aspect, M1=M2, K1=K2, and the positions of the M1 symbols and the K1 symbols in the first frequency band are symmetrical to the positions of the M2 symbols and the K2 symbols in the second frequency band.

[0061] In the embodiment of the present application, the symmetrical setting of DMRS in the two frequency bands enables the receiving device to perform data demodulation in the two frequency bands in the same manner, which can reduce the complexity of demodulation and improve network performance.

[0062] Optionally, as an implementation manner of the first aspect, the M2 symbols include the first symbol in the second frequency band.

[0063] Since the receiving end can demodulate data only after acquiring DMRS, the embodiment of the present application allows DMRS to occupy the first symbol in the second frequency band, so that the receiving end can first acquire the DMRS and can demodulate quickly, thereby meeting the demand for fast demodulation.

[0064] It should be understood that the M2 symbol positions may also be any position in the second frequency band, and the embodiments of the present application are not limited to this.

[0065] For example, the M2 symbol positions are located in the first half of the second frequency band, or the first symbol of the M2 symbols is located in the first half of the second frequency band. For example, M2=2, the two symbols can be the second and third symbols of the second frequency band, or the third and fourth symbols. The embodiments of the present application are not limited to this.

[0066] Optionally, as an implementation manner of the first aspect, the DMRS in the preset DMRS pattern also occupies P consecutive symbols in a resource scheduling unit that is not frequency-hopped, and the P symbols are not adjacent to the M symbols and the K symbols;

[0067] The DMRS in the DMRS pattern corresponding to the current mode also occupies consecutive P1 symbols in the symbols of the first frequency band, and consecutive P2 symbols in the second frequency band, wherein the P1 symbol is not adjacent to the M1 symbol and the K1 symbol, and the P2 symbol is not adjacent to the M2 symbol and the K2 symbol, and P, P1, and P2 are integers greater than or equal to 1.

[0068] In the embodiment of the present application, in the frequency hopping mode, by transmitting three groups of DMRS in both frequency bands, it is possible to ensure accurate demodulation of data when the channel state fluctuates greatly.

[0069] It should be understood that the DMRS in the preset DMRS pattern in the embodiment of the present application can occupy L groups of symbols, where L can be 2, 3, 4 or a larger value. Similarly, in the frequency hopping mode, the DMRS in the DMRS pattern corresponding to the current mode occupies L groups of symbols in each frequency band.

[0070] Optionally, as an implementation manner of the first aspect, the current mode is an aggregation mode, the number of the multiple resource scheduling units is Y, and Y is an integer greater than or equal to 2;

[0071] In the preset DMRS pattern, the DMRS occupies at least one continuous symbol in each resource scheduling unit in Y resource scheduling units.

[0072] In the DMRS pattern corresponding to the current mode, the DMRS occupies at least one continuous symbol in each of the first Y1 resource scheduling units among Y resource scheduling units, where Y1 is an integer greater than or equal to 1 and less than Y.

[0073] In the embodiment of the present application, in the aggregation mode, DMRS only occupies the symbols in the first Y1 resource scheduling units out of the Y aggregate transmissions, thereby reducing the resources occupied by DMRS, avoiding resource waste, and improving network performance.

[0074] Optionally, as an implementation method of the first aspect, the current mode is an aggregation mode, the multiple resource scheduling units are Y, and the DMRS in the preset DMRS pattern occupies L groups of symbols in each of the Y resource scheduling units, L is an integer greater than or equal to 2, wherein the L groups of symbols are not adjacent, and each group of symbols in the L groups of symbols includes at least one continuous symbol; in the DMRS pattern corresponding to the current mode, the DMRS occupies L1 groups of symbols in each of the Y resource scheduling units, L1 is an integer less than L, wherein the L1 groups of symbols are not adjacent, and each group of symbols in the L1 groups of symbols includes at least one continuous symbol.

[0075] In the embodiment of the present application, in the aggregation mode, DMRS only occupies the L1 group symbols in each of the Y resource scheduling units of the aggregate transmission, thereby reducing the resources occupied by DMRS, avoiding resource waste, and improving network performance.

[0076] Optionally, as an implementation method of the first aspect, the current mode is an aggregation mode, the multiple resource scheduling units are Y, the DMRS in the preset DMRS pattern occupies L groups of symbols in each of the Y resource scheduling units, and the DMRS in the DMRS pattern corresponding to the current mode occupies L groups of symbols in each of the Y resource scheduling units, wherein L is an integer greater than or equal to 2, wherein the L groups of symbols are not adjacent, each group of symbols in the L groups of symbols includes at least one continuous symbol, the maximum difference in the spacing between any two adjacent groups of symbols in the Y*L groups of symbols occupied by the DMRS in the preset DMRS pattern is R symbols, the maximum difference in the spacing between any two adjacent groups of symbols in the Y*L groups of symbols occupied by the DMRS in the DMRS pattern corresponding to the current mode is S symbols, and S <R。

[0077] Therefore, in the embodiment of the present application, in the aggregation mode, the symbols in the Y resource scheduling units of the aggregate transmission occupied by the DMRS are distributed more evenly, which can improve the demodulation performance, avoid resource waste, and improve network performance.

[0078] It should be understood that, herein, the number of symbols in a group of symbols occupied by DMRS is not limited, and the group of symbols may include at least one symbol, for example, 1 symbol, 2 symbols, or 3 symbols, etc. The implementation of the present application is not limited thereto.

[0079] In a second aspect, a method for transmitting DMRS is provided, the method comprising: a communication device uses indication information of an additional DMRS to determine a DMRS pattern corresponding to a frequency hopping mode, the additional DMRS represents a DMRS located after a front load DMRS, the indication information is used to indicate at least one of the following: whether the additional DMRS exists, the number of the additional DMRS and the position of the additional DMRS, the frequency hopping mode indicates that a part of symbols in a resource scheduling unit is located in a first frequency band and another part of symbols is located in a second frequency band, and the communication device uses the DMRS pattern to map or demap the DMRS.

[0080] It should be noted that in NR, if only the first half has DMRS, after frequency hopping, the second half has no pilot and data cannot be decoded normally. If frequency hopping is considered and DMRS is designed separately for it, the complexity of DMRS design will increase and the complexity of system implementation will increase.

[0081] The embodiments of the present application can flexibly determine the DMRS pattern corresponding to the frequency hopping mode based on the parameters existing in the system, that is, the indication information of the additional DMRS, which can reduce the implementation complexity and improve the system performance.

[0082] Optionally, as an implementation method, when the indication information is used to indicate that the additional DMRS does not exist, the DMRS in the DMRS pattern occupies a segment of symbols in the first frequency band and a segment of symbols in the second frequency band, wherein a segment of symbols includes at least one continuous symbol.

[0083] Optionally, as an implementation manner, a segment of symbols in the first frequency band includes a first symbol in a first area in the first frequency band, and the first area includes symbols occupied by data and DMRS.

[0084] Optionally, as an implementation manner, a segment of symbols in the second frequency band includes the first symbol in the second frequency band.

[0085] Optionally, as an implementation method, when the indication information is used to indicate the presence of the additional DMRS, the number and position of symbol segments occupied by the DMRS in the DMRS pattern in the first frequency band, and the number and position of symbol segments occupied in the second frequency band are the same as the number and position indicated by the indication information and the preceding DMRS indication information.

[0086] For example, the number and position of symbol segments occupied by DMRS in the first frequency band are the same as the number and position of DMRS segments indicated by the front load DMRS indication information, and the number and position of symbol segments occupied by DMRS in the first frequency band are the same as the number and position of DMRS segments indicated by the additional DMRS indication information.

[0087] Optionally, as an implementation manner, when the indication information is used to indicate the presence of the additional DMRS,

[0088] The DMRS in the DMRS pattern occupies two discontinuous symbol segments in the first frequency band and two discontinuous symbol segments in the second frequency band, or, the DMRS in the DMRS pattern occupies two discontinuous symbol segments in the first frequency band and one symbol segment in the second frequency band, or, the DMRS in the DMRS pattern occupies one symbol segment in the first frequency band and two discontinuous symbol segments in the second frequency band, wherein each of the two symbol segments includes a continuous indication of one symbol, and the one symbol segment includes at least one continuous symbol.

[0089] Optionally, as an implementation method, when the DMRS occupies two discontinuous symbol segments in the first frequency band in the DMRS pattern, the latter symbol segment of the two symbol segments in the first frequency band includes the last symbol in the first frequency band; or, when the DMRS occupies two discontinuous symbol segments in the second frequency band in the DMRS pattern, the former symbol segment of the two symbol segments in the second frequency band includes the first symbol in the second frequency band.

[0090] In a third aspect, a communication device is provided, which is used to execute the method in the first aspect, the second aspect, or any possible implementation of the first aspect and the second aspect. Specifically, the network device includes a unit for executing the method.

[0091] In a fourth aspect, a communication device is provided, which includes a processor and a memory, the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory to execute the method in any possible implementation of the first aspect, the second aspect, or the first and second aspects mentioned above.

[0092] In a fifth aspect, a computer-readable medium is provided, on which a computer program is stored. When the computer program is executed by a computer, the method in the first aspect, the second aspect, or any possible implementation manner of the first aspect and the second aspect is implemented.

[0093] In a sixth aspect, a computer program product is provided, which, when executed by a computer, implements the method in the first aspect, the second aspect, or any possible implementation manner of the first aspect and the second aspect.

[0094] In a seventh aspect, a processing device is provided, comprising a processor and an interface;

[0095] The processor is used to execute the method in the above-mentioned first aspect, second aspect, or any possible implementation manner of the first aspect and the second aspect.

[0096] It should be understood that the processing device in the above-mentioned seventh aspect can be a chip, and the processor can be implemented by hardware or by software. When implemented by hardware, the processor can be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor can be a general-purpose processor, which is implemented by reading the software code stored in the memory. The memory can be integrated in the processor, or can be located outside the processor and exist independently. BRIEF DESCRIPTION OF THE DRAWINGS

[0097] Figure 1 This is a schematic block diagram of a communication system to which the embodiments of the present application can be applied.

[0098] Figure 2 is a schematic flow chart of a method for transmitting DMRS according to an embodiment of the present application.

[0099] Figure 3 is a schematic flowchart of a method for transmitting DMRS according to another embodiment of the present application.

[0100] Figure 4 is a schematic flowchart of a method for transmitting DMRS according to another embodiment of the present application.

[0101] Figure 5 is a schematic diagram of a preset DMRS pattern according to an embodiment of the present application.

[0102] Figure 6 is a schematic diagram of a preset DMRS pattern according to another embodiment of the present application.

[0103] Figure 7 is a schematic diagram of a DMRS pattern according to an embodiment of the present application.

[0104] Figure 8 It is a schematic diagram of a DMRS pattern in the prior art.

[0105] Fig. 9 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0106] Fig.10 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0107] Fig.11 It is a schematic diagram of another DMRS pattern in the prior art.

[0108] Fig.12 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0109] Fig.13 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0110] Fig.14 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0111] Fig.15 It is a schematic diagram of another DMRS pattern in the prior art.

[0112] Fig.16 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0113] Fig.17 It is a schematic diagram of another DMRS pattern in the prior art.

[0114] Fig.18 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0115] Fig.19 It is a schematic block diagram of a communication device according to an embodiment of the present application.

[0116] Fig. 20 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0117] Fig.21 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0118] Fig. 22 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0119] Fig.23 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0120] Fig.24 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0121] Fig.25 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0122] Fig.26 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0123] Fig. 27 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0124] Fig.28 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0125] Fig.29 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0126] Fig.30 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0127] Fig.31 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0128] Fig.32 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0129] Fig.33 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0130] Fig.34 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0131] Fig.35 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

[0132] Fig.36 This is a schematic diagram of DMRS multiplexing according to an embodiment of the present application.

[0133] Fig.37 This is a schematic diagram of DMRS multiplexing according to another embodiment of the present application. DETAILED DESCRIPTION

[0134] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0135] The embodiments of the present application can be applied to various communication systems, and therefore, the following description is not limited to a specific communication system. For example, the embodiments of the present application can be applied to a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) system, a general packet radio service (GPRS), a long term evolution (LTE) system, a LTE frequency division duplex (FDD) system, a LTE time division duplex (TDD), a universal mobile telecommunication system (UMTS), a wireless local area network (WLAN), wireless fidelity (WiFi), and a next generation communication system, i.e., a fifth generation (5G) communication system, for example, a new radio (NR) system.

[0136] In the embodiment of the present application, the network device may be a base transceiver station (BTS) in global system of mobile communication (GSM) or code division multiple access (CDMA), a base station (nodeB, NB) in wideband code division multiple access (WCDMA), an evolutionary base station (eNB / eNodeB) in long term evolution (LTE), or a relay station or access point, or a network side device in a future 5G network, for example, a transmission point (TRP or TP) in an NR system, a base station (gNB) in an NR system, a radio frequency unit in an NR system, such as a remote radio frequency unit, one or a group (including multiple antenna panels) of antenna panels of a base station in a 5G system, etc. Different network devices may be located in the same cell or in different cells, and the specific details are not limited here.

[0137] In the embodiments of the present application, the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The access terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, an unmanned aerial vehicle device, and a terminal device in a future 5G network.

[0138] Figure 1 Schematic diagram of a communication system using the method for transmitting data of the present invention. The communication system may be any of the above-mentioned communication systems. Figure 1 As shown, the communication system 100 includes a network side device 102, and the network side device 102 may include multiple antenna groups. Each antenna group may include multiple antennas, for example, one antenna group may include antennas 104 and 106, another antenna group may include antennas 108 and 110, and an additional group may include antennas 112 and 114. Figure 1 Two antennas are shown for each antenna group, however, more or fewer antennas may be used for each group. The network side device 102 may additionally include a transmitter chain and a receiver chain, and those skilled in the art will appreciate that they may include multiple components related to signal transmission and reception (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, or antennas, etc.).

[0139] The network side device 102 can communicate with a plurality of terminal devices, such as the terminal device 116 and the terminal device 122. However, it is understood that the network side device 102 can communicate with any number of terminal devices similar to the terminal devices 116 or 122. The terminal devices 116 and 122 can be, for example, cellular phones, smart phones, laptops, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and / or any other suitable devices for communicating on the wireless communication system 100.

[0140] like Figure 1As shown, terminal device 116 is in communication with antennas 112 and 114, where antennas 112 and 114 transmit information to terminal device 116 via forward link 118 and receive information from terminal device 116 via reverse link 120. In addition, terminal device 122 is in communication with antennas 104 and 106, where antennas 104 and 106 transmit information to terminal device 122 via forward link 124 and receive information from terminal device 122 via reverse link 126.

[0141] For example, in a frequency division duplex (FDD) system, forward link 118 may utilize a different frequency band than that used by reverse link 120 and forward link 124 may utilize a different frequency band than that used by reverse link 126, for example.

[0142] As another example, in a time division duplex (TDD) system and a full duplex system, forward link 118 and reverse link 120 can utilize a common frequency band, and forward link 124 and reverse link 126 can utilize a common frequency band.

[0143] Each group of antennas and / or area designed for communication is called a sector of the network device 102. For example, the antenna group may be designed to communicate with terminal devices in a sector of the coverage area of ​​the network device 102. In the process of the network device 102 communicating with the terminal devices 116 and 122 via the forward links 118 and 124, respectively, the transmit antenna of the network device 102 may utilize beamforming to improve the signal-to-noise ratio of the forward links 118 and 124. In addition, compared with the way in which the network device 102 transmits signals to all of its terminal devices via a single antenna, when the network device 102 utilizes beamforming to transmit signals to the terminal devices 116 and 122 randomly dispersed in the relevant coverage area, the mobile devices in the adjacent cells will be less interfered.

[0144] At a given time, the network side device 102, the terminal device 116 or the terminal device 122 may be a wireless communication transmitting device and / or a wireless communication receiving device. When sending data, the wireless communication transmitting device may encode the data for transmission. Specifically, the wireless communication transmitting device may obtain (e.g., generate, receive from other communication devices, or store in a memory, etc.) a certain number of data bits to be sent to the wireless communication receiving device through a channel. Such data bits may be included in a transmission block (or multiple transmission blocks) of data, and the transmission block may be segmented to generate multiple code blocks.

[0145] In order to make the embodiments of the present invention easier to understand, the transmission process of DMRS involved in the implementation of the present invention is first described below. These descriptions should not be regarded as limiting the scope of protection required for the present invention.

[0146] Specifically, the transmitting device (for example, the downlink transmission is a network device, and the uplink transmission is a terminal device) sends the precoded DMRS and data according to the DMRS pattern, so that after the receiving device receives the information sent by the transmitting device, it can obtain the DMRS according to the DMRS pattern, and demodulate the data according to the DMRS to obtain the data.

[0147] In practical applications, both the transmitting device and the receiving device need to know the symbol positions occupied by DMRS, that is, in order to enable the receiving device to accurately demodulate data, the transmitting device and the receiving device need to use the same DMRS pattern for communication. Specifically, the transmitting device maps DMRS according to the DMRS pattern, and the receiving device demaps DMRS according to the DMRS pattern.

[0148] The embodiment of the present application mainly relates to the DMRS pattern according to which the communication device (network device or terminal device) performs DMRS mapping or demapping. The method for transmitting DMRS in the embodiment of the present application is described in detail below in conjunction with the accompanying drawings.

[0149] Figure 2 A schematic flowchart of a method for transmitting DMRS according to an embodiment of the present application is shown. Figure 2 The method 200 shown can be applied to any communication system described above. Figure 2 The method shown can be executed by a communication device, which can be a network device or a terminal device. The network device can be any of the network devices described above, and the terminal device can be any of the terminal devices described above. The embodiments of the present application are not limited thereto. Specifically, Figure 2 The illustrated method 200 includes:

[0150] 210. The communication device determines a current mode of a resource scheduling unit, which current mode includes a frequency hopping mode or an aggregation mode. The frequency hopping mode indicates that a part of symbols in a resource scheduling unit are located in a first frequency band, and another part of symbols are located in a second frequency band. The aggregation mode indicates that multiple resource scheduling units are aggregated for transmission.

[0151] It should be understood that in the embodiments of the present application, the symbol represents a time unit, and the symbol in this article can also be called an OFDM symbol, but the embodiments of the present application are not limited to this.

[0152] It should also be understood that in an embodiment of the present application, a resource unit may include n symbols, where n is an integer greater than or equal to 2, for example, n is 7, 14 or any value between 2 and 13, and the embodiment of the present application is not limited to this.

[0153] It should be understood that in the embodiment of the present application, the DMRS pattern can also be referred to as DMRS distribution information or DMRS attributes. The DMRS pattern can represent the symbol position and symbol data occupied by the DMRS, but the embodiment of the present application is not limited to this.

[0154] 220, the communication device uses a DMRS pattern corresponding to the current mode to perform DMRS mapping or demapping, wherein the symbol position occupied by the DMRS in the DMRS pattern corresponding to the current mode is different from the symbol position occupied by the DMRS in the preset DMRS pattern.

[0155] It should be understood that in the embodiments of the present application, the DMRS pattern can represent the symbol position occupied by the DMRS, and the DMRS pattern can also be called the DMRS position, DMRS attribute or data distribution information, etc. The embodiments of the present application are not limited to this.

[0156] It should be understood that when the communication device sends data, DMRS mapping is performed according to the DMRS pattern corresponding to the current mode, and when the communication device receives data, DMRS demapping is performed according to the DMRS pattern corresponding to the current mode.

[0157] For example, the communication device is a network device, and when performing uplink transmission, the communication device uses the DMRS pattern corresponding to the current mode to demap the DMRS; when performing downlink transmission, the communication device uses the DMRS pattern corresponding to the current mode to map the DMRS. For another example, the communication device is a terminal device, and when performing uplink transmission, the communication device uses the DMRS pattern corresponding to the current mode to map the DMRS, and when performing downlink transmission, the communication device uses the DMRS pattern corresponding to the current mode to demap the DMRS.

[0158] It should be understood that in the embodiment of the present application, the preset DMRS pattern may also be referred to as a predefined pattern, a default pattern or a first DMRS pattern, and the DMRS pattern corresponding to the current mode may also be referred to as a second DMRS pattern. In the embodiment of the present application, the preset DMRS pattern represents the DMRS pattern used in the first mode (i.e., non-frequency hopping and non-aggregation mode).

[0159] In the prior art, regardless of the transmission mode, a preset DMRS pattern is used for communication, that is, the symbol position occupied by the DMRS is the same as the symbol position occupied by the DMRS in the preset DMRS pattern. However, in some application scenarios, when the mode of the resource scheduling unit changes, if the DMRS is still sent in the existing fixed transmission DMRS manner, since the distribution mode of the DMRS in the preset DMRS pattern is difficult to meet the needs of different modes, it will cause a waste of DMRS resources or cause poor demodulation performance at the receiving end and other adverse effects, affecting network performance.

[0160] However, the DMRS pattern in the current mode in the embodiment of the present application is different from the preset pattern. The embodiment of the present application can flexibly select the symbol position occupied by the DMRS according to different modes, and thus the embodiment of the present application can meet the requirements of different modes and improve network performance.

[0161] Combine the following Figure 3 and Figure 4 Specific examples of the method for transmitting DMRS according to the embodiments of the present application are described respectively.

[0162] Figure 3 A method for transmitting DMRS in an embodiment of the present application is shown. Figure 3 The method for transmitting DMRS in downlink transmission in an embodiment of the present application is described, specifically, Figure 3 As shown, the method 300 includes:

[0163] 310. The network device determines a current mode of the resource scheduling unit.

[0164] Specifically, the network device may determine the current mode according to multiple methods.

[0165] Optionally, in one implementation, the network device may determine the current mode based on the channel state information reported by the terminal device and the network state of the cell.

[0166] Optionally, the network device may determine the current mode according to the waveform used by the terminal device, such as a single carrier or multiple carriers. For example, when the terminal device uses a single carrier, the current mode may be a frequency hopping mode, and when the terminal device uses multiple carriers, the current mode may be an aggregation mode. The embodiments of the present application are not limited thereto, for example, when the terminal device uses a single carrier, the current mode may also be an aggregation mode.

[0167] Optionally, in another implementation, the network device may determine the current mode according to the service type, wherein the service type may include a service requiring fast demodulation or a service requiring high transmission performance.

[0168] Optionally, in another implementation, the network device may determine the current mode according to the indication information sent by the terminal device, that is, the terminal device may determine the current mode according to the current state, for example, the network state or the service state, and then the terminal device indicates the current mode to the network device. In this case, the terminal device sends the indication information to the network device, so that the network device determines the current mode according to the indication information sent by the terminal device.

[0169] 320. The network device performs DMRS mapping according to the DMRS pattern corresponding to the current mode.

[0170] Specifically, the network device maps the DMRS and data according to the DMRS pattern, and sends the mapped DMRS and data.

[0171] In one implementation, the DMRS pattern corresponding to the current mode may be preset by the system, that is, the system may preset the correspondence between the mode of the resource scheduling unit and the DMRS pattern. After the network device and the terminal device determine the current mode, they may determine the DMRS pattern corresponding to the current mode according to the preset correspondence.

[0172] In another implementation, the network device may determine the corresponding DMRS pattern according to the current mode, and indicate the DMRS pattern corresponding to the current mode to the terminal device through the second indication information. For example, the network device may flexibly determine the DMRS pattern corresponding to the current mode according to the channel state or service requirements corresponding to the current mode, and the embodiments of the present application are not limited thereto.

[0173] 330. The terminal device demaps the DMRS according to the DMRS pattern corresponding to the current mode.

[0174] After receiving the data sent by the network device, the terminal device can demap the DMRS according to the DMRS pattern corresponding to the current mode and demodulate the data according to the DMRS.

[0175] It should be understood that before demapping the DMRS, the terminal device needs to know the DMRS pattern used by the network device when performing DMRS mapping, that is, the DMRS pattern corresponding to the current mode.

[0176] In one implementation, the DMRS pattern corresponding to the current mode may be preset by the system, that is, the system may preset the correspondence between the resource scheduling unit mode and the DMRS pattern, and when the terminal device determines the resource scheduling unit mode, the DMRS pattern corresponding to the current mode may be determined according to the preset correspondence. Specifically, the terminal device may determine the current mode in a variety of ways.

[0177] Optionally, the terminal device may determine the current mode according to the indication of the network device. Specifically, the terminal device may receive first indication information sent by the network device, and the first indication information is used by the terminal device to determine the current mode. After the terminal device obtains the first indication information, the current mode of the resource scheduling unit may be determined according to the first indication information.

[0178] It should be understood that the first indication information can directly indicate that the current mode is an aggregation mode or a frequency hopping mode. Optionally, the first indication information can indirectly indicate the current mode. For example, the first indication information indicates the length of the resource scheduling unit, and the terminal device can determine the current mode according to the length of the resource scheduling unit; for another example, the first indication information indicates the current service type, and the terminal device determines the current mode according to the service type. The embodiments of the present application are not limited to this.

[0179] It should be understood that the network device can send the first indication information to the terminal device through various signaling, such as downlink control information (DCI), radio resource control (RRC) signaling, media access control (MAC) layer control element (CE), etc., and the embodiments of the present application are not limited to this.

[0180] Optionally, the terminal device may determine the current mode according to the current state. For example, the terminal device determines the current mode according to the network state or the service state, and then the terminal device indicates the current mode to the network device.

[0181] Alternatively, in another implementation of determining the DMRS pattern, the terminal device determines the DMRS pattern corresponding to the current mode according to the second indication information sent by the network device.

[0182] It should be understood that the network device can send the second indication information to the terminal device through various signaling, such as DCI, RRC signaling, MAC CE, etc., and the embodiments of the present application are not limited to this.

[0183] Specifically, since the network device and the terminal device need to determine the DMRS pattern when performing data transmission, the network device notifies the terminal device of the DMRS pattern used when performing data transmission with the terminal device. The terminal device can determine the time-frequency resource position of the DMRS based on the DMRS pattern, and then perform DMRS mapping or demapping.

[0184] Figure 4 A method for transmitting DMRS in an embodiment of the present application is shown. Figure 4 The method for transmitting DMRS in uplink transmission in an embodiment of the present application is described, specifically, Figure 4 As shown, the method 400 includes:

[0185] 410. The terminal device determines the current mode of the resource scheduling unit.

[0186] It should be understood that step 410 and Figure 3 The manner in which the terminal device determines the current mode in step 330 is similar, and to avoid repetition, a detailed description is appropriately omitted here.

[0187] Optionally, the terminal device may determine the current mode according to the indication of the network device. Specifically, the terminal device may receive first indication information sent by the network device, and the first indication information is used by the terminal device to determine the current mode. After the terminal device obtains the first indication information, the current mode of the resource scheduling unit may be determined according to the first indication information.

[0188] It should be understood that the first indication information can directly indicate that the current mode is an aggregation mode or a frequency hopping mode. Optionally, the first indication information can indirectly indicate the current mode. For example, the first indication information indicates the length of the resource scheduling unit, and the terminal device can determine the current mode according to the length of the resource scheduling unit; for another example, the first indication information indicates the current service type, and the terminal device determines the current mode according to the service type. The embodiments of the present application are not limited to this.

[0189] It should be understood that the network device can send the first indication information to the terminal device through various signaling, such as downlink control information (DCI), radio resource control (RRC) signaling, media access control (MAC) layer control element (CE), etc., and the embodiments of the present application are not limited to this.

[0190] Optionally, the terminal device may determine the current mode according to the current state. For example, the terminal device determines the current mode according to the network state or the service state, and then the terminal device indicates the current mode to the network device.

[0191] 420. The terminal device maps the DMRS according to the DMRS pattern corresponding to the current mode.

[0192] Specifically, the terminal device first determines the DMRS pattern corresponding to the current mode, maps the DMRS and data according to the DMRS pattern, and sends the mapped DMRS and data.

[0193] Specifically, the method for the terminal device to determine the DMRS pattern corresponding to the current mode in step 420 is similar to Figure 3 The method for the terminal device to determine the DMRS pattern corresponding to the current mode in step 330 corresponds to the method in step 330. To avoid repetition, the detailed description is appropriately omitted here.

[0194] In one implementation, the DMRS pattern corresponding to the current mode may be preset by the system, that is, the system may preset the correspondence between the resource scheduling unit mode and the DMRS pattern, and when the terminal device determines the resource scheduling unit mode, the DMRS pattern corresponding to the current mode may be determined according to the preset correspondence. Specifically, the terminal device may determine the current mode in a variety of ways.

[0195] Alternatively, in another implementation of determining the DMRS pattern, the terminal device determines the DMRS pattern corresponding to the current mode according to the second indication information sent by the network device.

[0196] It should be understood that the network device can send the second indication information to the terminal device through various signaling, such as DCI, RRC signaling, MAC CE, etc., and the embodiments of the present application are not limited to this.

[0197] Specifically, since the network device and the terminal device need to determine the DMRS pattern when performing data transmission, the network device notifies the terminal device of the DMRS pattern used when performing data transmission with the terminal device. The terminal device can determine the time-frequency resource position of the DMRS based on the DMRS pattern, and then perform DMRS mapping or demapping.

[0198] 430 , the network device demaps the DMRS according to the DMRS pattern corresponding to the current mode.

[0199] After receiving the data sent by the terminal device, the network device can demap the DMRS according to the DMRS pattern corresponding to the current mode, and demodulate the data according to the DMRS.

[0200] It should be understood that before demapping the DMRS, the network device needs to know the DMRS pattern used by the terminal device when performing DMRS mapping, that is, the DMRS pattern corresponding to the current mode.

[0201] It should be understood that the method for the network device to determine the pattern corresponding to the current mode in step 430 is similar to Figure 3 The method for the network device to determine the pattern corresponding to the current mode in step 320 corresponds to that described above. To avoid repetition, detailed description is appropriately omitted here.

[0202] In one implementation, the DMRS pattern corresponding to the current mode may be preset by the system, that is, the system may preset the correspondence between the mode of the resource scheduling unit and the DMRS pattern. After the network device and the terminal device determine the current mode, they may determine the DMRS pattern corresponding to the current mode according to the preset correspondence.

[0203] In another implementation, the network device may determine the corresponding DMRS pattern according to the current mode, and indicate the DMRS pattern corresponding to the current mode to the terminal device through the second indication information. For example, the network device may flexibly determine the DMRS pattern corresponding to the current mode according to the channel state or service requirements corresponding to the current mode, and the embodiments of the present application are not limited thereto.

[0204] Specifically, the network device may determine the current mode according to multiple methods.

[0205] Optionally, in one implementation, the network device may determine the current mode based on the channel state information reported by the terminal device and the network state of the cell.

[0206] Optionally, the network device may determine the current mode according to the waveform used by the terminal device, such as a single carrier or multiple carriers. For example, when the terminal device uses a single carrier, the current mode may be a frequency hopping mode, and when the terminal device uses multiple carriers, the current mode may be an aggregation mode. The embodiments of the present application are not limited thereto, for example, when the terminal device uses a single carrier, the current mode may also be an aggregation mode.

[0207] Optionally, in another implementation, the network device may determine the current mode according to the service type, wherein the service type may include a service requiring fast demodulation or a service requiring high transmission performance.

[0208] Optionally, in another implementation, the network device may determine the current mode according to the indication information sent by the terminal device, that is, the terminal device may determine the current mode according to the current state, for example, the network state or the service state, and then the terminal device indicates the current mode to the network device. In this case, the terminal device sends the indication information to the network device, so that the network device determines the current mode according to the indication information sent by the terminal device.

[0209] The above describes the specific form of transmitting DMRS during uplink and downlink transmission in the embodiment of the present application. The specific form of the DMRS pattern in the embodiment of the present application is described in detail below with reference to the accompanying drawings.

[0210] Specifically, the preset DMRS pattern can be divided into multiple cases, which will be described in detail with examples below:

[0211] Case 1: The preset pattern is the front loaded pattern, such as Figure 5 As shown, taking a resource scheduling unit occupying 14 symbols as an example, DMRS occupies N consecutive symbols in a resource scheduling unit, where N is an integer greater than or equal to 1. Figure 5The case where N=1 is shown in FIG. It should be understood that the continuous N symbols may also be referred to as a group of symbols, and the group of symbols includes at least one (N) continuous symbol, but the embodiment of the present application is not limited thereto.

[0212] Case 2: The default pattern is an additional pattern, such as Figure 6 As shown, taking a resource scheduling unit occupying 14 symbols as an example, DRMS ​​occupies L groups of symbols, where L is an integer greater than or equal to 2, wherein the L groups of symbols are not adjacent, and each group of symbols in the L groups of symbols includes at least one continuous symbol; Figure 6 Take L=2 as an example, that is, DMRS occupies M consecutive symbols and K consecutive symbols in a resource scheduling unit, wherein the M symbols are not adjacent to the K symbols, and M and K are integers greater than or equal to 1. Figure 6 , M=1 and K=1 are shown, but the embodiment of the present invention is not limited thereto, for example, M and K may also be equal to 2 or 3, etc. Optionally, in the embodiment of the present application, it is not limited to the case where DMRS occupies two groups of symbols, L may also be equal to 3, that is, DMRS also occupies P consecutive symbols in a resource scheduling unit that is not frequency hopping, and optionally, L may also be equal to 4, 5, etc.

[0213] It should be understood that in the above case 1, DMRS only occupies one group of symbols, and in case 2, DMRS occupies at least two groups of symbols. Case 1 and case 2 can correspond to different application scenarios. Case 2 can correspond to a scenario where the channel state fluctuates greatly, for example, a scenario where the terminal device moves quickly. In case 2, accurate demodulation of the data is achieved by transmitting multiple groups of DMRS. Case 1 can correspond to a scenario where the channel state is relatively stable. Therefore, accurate demodulation of the data can be achieved by transmitting one group of DMRS.

[0214] The following describes in detail the DMRS patterns corresponding to the current mode of the embodiment of the present application in combination with the above two situations when the current modes are the frequency hopping mode and the aggregation mode.

[0215] First, the diagrams of the embodiments of the present application corresponding to the above-mentioned cases 1 and 2 are described when the current mode is the frequency hopping mode.

[0216] Specifically, when the current mode is the frequency hopping mode, for the above situation 1, in the embodiment of the present application, if Figure 7 As shown, in the DMRS pattern corresponding to the current mode, the DMRS occupies N1 consecutive symbols in the first frequency band and N2 consecutive symbols in the second frequency band, where N1 is an integer greater than or equal to 1, and N2 is an integer greater than or equal to 1. Figure 7 The case where N1=1, N2=1 is shown.

[0217] Figure 8 It shows that in the existing method, in the frequency hopping mode, it is still in accordance with Figure 5 The DMRS is transmitted at the position in the preset pattern shown, by Figure 8 It can be seen that DMRS is transmitted in the first frequency band, but not in the second frequency band. However, in actual applications, the channel state corresponding to the second frequency band is often different from the channel state corresponding to the first frequency band. Therefore, demodulating data only based on the DMRS transmitted in the first frequency band will affect the accuracy of data demodulation in the second frequency band and affect network performance.

[0218] In the embodiment of the present application, in the frequency hopping mode, since the channel states of the two frequency bands are different, in the embodiment of the present application, DMRS is transmitted in each frequency band, so that the receiving end can demodulate the corresponding data according to the DMRS in each frequency band, which can improve the accuracy of data demodulation and enhance the demodulation performance.

[0219] It should be understood that the N2 symbol positions may be any position in the second frequency band, and the embodiments of the present application are not limited thereto.

[0220] Optionally, as an embodiment, N1=N2, and the positions of the N1 symbols in the first frequency band are symmetrical to the positions of the N2 symbols in the second frequency band. Fig. 9 As shown, N1=N2=1, and N1 and N2 are both the third symbol positions in the first frequency band and the second frequency band.

[0221] Therefore, in the embodiment of the present application, the symmetrical setting of DMRS in the two frequency bands enables the receiving device to use the same method to perform data demodulation in the two frequency bands, which can reduce the complexity of demodulation and improve network performance.

[0222] Optionally, as another embodiment, N1=N2=1 or 2.

[0223] Optionally, the N1 symbols include the first symbol in a first area in the first frequency band, and the first area includes symbols occupied by data and DMRS.

[0224] Optionally, the N2 symbols include the first symbol in the second frequency band.

[0225] Optionally, as another embodiment, the N2 symbols include the first symbol in the second frequency band. Figure 7 As shown, N2=1, and DMRS occupies the first symbol in the second frequency band. It should be understood that Figure 7Only the case of N2=1 is shown, but the embodiments of the present application are not limited to this. When DMRS occupies multiple symbol positions in the second frequency band, the multiple symbols are arranged continuously from the first symbol in the second frequency band. For example, when N2=2, DMRS occupies the first symbol and the second symbol in the second frequency band.

[0226] Since the receiving device can demodulate data only after acquiring DMRS, the embodiment of the present application sets DMRS to occupy the first symbol in the second frequency band, so that the receiving end can first acquire the DMRS, thereby realizing fast demodulation of data.

[0227] It should be understood that the N2 symbol positions may also be any position in the second frequency band, and the embodiments of the present application are not limited to this.

[0228] For example, the N2 symbol positions are located in the first half of the second frequency band, or the first symbol of the N2 symbols is located in the first half of the second frequency band. For example, N2=2, the two symbols can be the second and third symbols of the second frequency band, or the third and fourth symbols. The embodiments of the present application are not limited to this.

[0229] When the current mode is the frequency hopping mode, for the additional pattern of the above situation 2, in the embodiment of the present application, Fig.10 As shown, in the DMRS pattern corresponding to the current mode, the DMRS occupies consecutive M1 symbols and consecutive K1 symbols in the symbols of the first frequency band, and consecutive M2 symbols and consecutive K2 symbols in the second frequency band, wherein the M1 symbol is not adjacent to the K1 symbol, and the M2 symbol is not adjacent to the K2 symbol, and M1, K1, M2, and K2 are integers greater than or equal to 1. Fig.10 The case where M1, K1, M2, and K2 are all equal to 1 is shown.

[0230] Optionally, it is described above that before frequency hopping, if there are 2 segments of DMRS, then after frequency hopping, the front and rear frequency bands each have 2 segments. However, the embodiment of the present application is not limited thereto. For example, before frequency hopping, as long as there are more than 1 segment of DMRS, after frequency hopping, it can be any one of the three types 2 described below. For details, please refer to the description of type 2 below.

[0231] Fig.11 It shows that in the existing method, in the frequency hopping mode, it is still in accordance with Figure 6 The DMRS is transmitted at the position of the preset pattern shown in FIG. Fig.11 It can be seen that a group of DMRS is transmitted in both the first frequency band and the second frequency band. However, in the scenario of the above second situation, due to the large fluctuation of the channel state, it is difficult to ensure accurate demodulation of the data by transmitting only one group of DMRS in one frequency band.

[0232] In the embodiment of the present application, in the frequency hopping mode, by transmitting multiple groups (L groups) of DMRS in both frequency bands, it is possible to ensure accurate demodulation of data when the channel state fluctuates greatly.

[0233] It should be understood that Figure 6 In the two groups of symbols occupied by DMRS in the preset additional pattern described in , the first group of symbols is located in the first half of the resource scheduling unit, and the second group of symbols is located in the second half of the resource scheduling unit, but the embodiment of the present invention is not limited to this. For example, Figure 6 The additional pattern in the DMRS may evolve into two groups of occupied symbols that may both be located in the first half of the resource scheduling unit. For example, in the preset additional pattern, the DMRS occupies the 3rd and 6th symbols. In this case, Fig.11 The pattern in the frequency hopping mode in the existing method shown can be evolved into transmitting two groups of DMRS in the first frequency band, for example, transmitting DMRS in the 3rd and 6th symbols of the first frequency band, and not transmitting DMRS in the second frequency band. In this case, since the second frequency band does not transmit DMRS, the accuracy of data demodulation in the second frequency band will be affected, affecting network performance.

[0234] In the embodiment of the present application, in the frequency hopping mode, since the channel states of the two frequency bands are different, in the embodiment of the present application, DMRS is transmitted in each frequency band, so that the receiving end can demodulate the corresponding data according to the DMRS in each frequency band, which can improve the accuracy of data demodulation and enhance the demodulation performance.

[0235] It should be understood that the embodiment of the present application does not limit the symbol positions of the DMRS in the first frequency band and the second frequency band. As long as each frequency band includes L groups of DMRS, the embodiment of the present application does not limit this.

[0236] Optionally, as another embodiment, M1=M2, K1=K2, and the positions of the M1 symbols and the K1 symbols in the first frequency band are symmetrical to the positions of the M2 symbols and the K2 symbols in the second frequency band. Fig.12 As shown, M1=M2=1, K1=K2=1, and DMRSs occupy the third and sixth symbol positions in the first frequency band and the second frequency band.

[0237] In the embodiment of the present application, the symmetrical setting of DMRS in the two frequency bands enables the receiving device to perform data demodulation in the two frequency bands in the same manner, which can reduce the complexity of demodulation and improve network performance.

[0238] Optionally, as another embodiment, the M2 symbols include the first symbol in the second frequency band. Fig.10As shown, M2=1, and M2 corresponds to the first symbol in the second frequency band. It should be understood that Fig.10 Only the case of M2=1 is shown, but the embodiments of the present application are not limited to this. When DMRS occupies multiple symbol positions in the second frequency band, the multiple symbols are arranged continuously from the first symbol in the second frequency band. For example, when M2=2, DMRS occupies the first symbol and the second symbol in the second frequency band.

[0239] Since the receiving end can demodulate data only after acquiring DMRS, the embodiment of the present application allows DMRS to occupy the first symbol in the second frequency band, so that the receiving end can first acquire the DMRS and can demodulate quickly, thereby meeting the demand for fast demodulation.

[0240] It should be understood that the M2 symbol positions may also be any position in the second frequency band, and the embodiments of the present application are not limited to this.

[0241] For example, the M2 symbol positions are located in the first half of the second frequency band, or the first symbol of the M2 symbols is located in the first half of the second frequency band. For example, M2=2, the two symbols can be the second and third symbols of the second frequency band, or the third and fourth symbols. The embodiments of the present application are not limited to this.

[0242] Optionally, as another embodiment, M1=M2=1 or 2, K1=K2=1 or 2.

[0243] Optionally, the K1 symbols include the penultimate symbol, the penultimate symbol or the penultimate symbol in the first frequency band.

[0244] Optionally, as another embodiment, the M1 symbols include a first symbol in a first area in the first frequency band, and the first area includes symbols occupied by data and DMRS.

[0245] Optionally, as another embodiment, the M2 symbols include the first symbol in the second frequency band.

[0246] Optionally, as another embodiment, M1=M, the M1 symbols are in the same position as the M symbols, the K1 symbols include the last symbol in the first frequency band, the M2 symbols include the first symbol in the first frequency band, K2=K, the k2 symbols are in the same position as the K symbols, or the K2 symbol positions are preset positions.

[0247] Optionally, as another embodiment, M1=M, the M1 symbols are in the same position as the M symbols, the K1 symbols include the 7th symbol in the entire resource scheduling unit, the entire resource scheduling unit includes the sum of symbols occupied by the first frequency band and the second frequency band, the entire resource scheduling unit includes 14 symbols, the M2 symbol includes the 8th symbol in the entire resource scheduling unit, K2=K, the K2 symbol is in the same position as the K symbols, or, the K2 symbol positions are preset positions.

[0248] It should be understood that, for the above situation 2, the above only describes the case where L=2 in one resource scheduling unit, that is, an example where DMRS occupies two groups of symbols, but the embodiment of the present application is not limited to this. In practical applications, L may also be equal to 3, 4, etc., that is, the DMRS in the DMRS pattern may occupy 3, 4 or more groups of DMRS, for example, Fig.13 As shown, a preset resource scheduling unit includes three groups of DMRS, that is, the DMRS in the preset DMRS pattern occupies M consecutive symbols, K consecutive symbols and P consecutive symbols in a resource scheduling unit without frequency hopping, and the P symbols, the M symbols and the K symbols are not adjacent; then the DMRS in the DMRS pattern corresponding to the current mode also occupies M1 consecutive symbols, K1 consecutive symbols and P1 consecutive symbols in the first frequency band, and M2 consecutive symbols, K2 consecutive symbols and P2 consecutive symbols in the second frequency band; wherein, the P1 symbol is not adjacent to the M1 symbol and the K1 symbol, and the P2 symbol is not adjacent to the M2 symbol and the K2 symbol, and M, K, P, M1, K1, P1, M2, K2, P2 are integers greater than or equal to 1. For simplicity, Fig.13 Only the case where M, K, P, M1, K1, P1, M2, K2, and P2 are all equal to 1 is shown, but the embodiments of the present application are not limited to this.

[0249] It should be understood that the case where L is equal to 4 or other values ​​may be similar to the above case where L is equal to 2 or 3. In order to avoid repetition, they will not be described one by one here.

[0250] The above describes the situation of the DMRS pattern corresponding to the current mode of the embodiment of the present application under the above situation 1 and situation 2 when the current mode is the frequency hopping mode.

[0251] It should be understood that the continuous symbols occupied by DMRS in the embodiment of the present application can also be called a group of DMRS symbols, or a segment of DMRS symbols, wherein the number (or number) of DMRS herein represents the number of groups of symbols or the number of segments of symbols occupied by DMRS, rather than the number of symbols. In other words, in the embodiment of the present application, DMRS can be multiple groups or multiple segments, wherein two segments of DMRS are not continuous in time, that is, at least one symbol is spaced between segments of DMRS. A group of DMRS or a segment of DMRS means that at least one continuous symbol (e.g., 1, 2, or 3) is occupied in the time domain. Fig. 20 Four typical types of frequency hopping modes in the embodiment of the present application are shown, namely type 1 and three types 2, wherein the three types 2 include type 2-I, type 2-II and type 2-III.

[0252] Fig. 20 Four typical types of frequency hopping modes in the embodiment of the present application are shown, namely type 1 and three types 2, wherein the three types 2 include type 2-I, type 2-II and similar type 2-III.

[0253] Among them, type 1 means that there is only one DMRS segment in each frequency band after frequency hopping, type 2-I means that there are two DMRS segments in each frequency band after frequency hopping, type 2-II means that there are two DMRS segments in the first frequency band and one DMRS segment in the second frequency band after frequency hopping, and type 2-III means that there is one DMRS segment in the first frequency band and two DMRS segments in the second frequency band after frequency hopping.

[0254] It should be understood that in the embodiments of the present application, Fig. 20 Only the case where each DMRS segment occupies one symbol is shown, but the embodiments of the present application are not limited to this. A DMRS segment only needs to occupy at least one continuous symbol, for example, a DMRS segment occupies one symbol or occupies two continuous symbols.

[0255] It should also be understood that the embodiments of the present application Fig. 20 It shows the situation that the two frequency bands divide 14 symbols equally after frequency hopping, that is, there are 7 symbols in each frequency band, but the embodiments of the present application are not limited to this. The number of symbols in the two frequency bands may also be unequal. For example, the first frequency band includes 6 symbols and the second frequency band includes 8 symbols; or, the first frequency band includes 4 symbols and the second frequency band includes 10 symbols, or, the first frequency band includes 9 symbols and the second frequency band includes 5 symbols, and so on.

[0256] It should be understood that Fig. 20Only four types of DMRS patterns are shown in the embodiment of the present application, but the positions of each DMRS in each pattern type and the relationship between the DMRS are not described. Each type and the position of its DMRS are described in detail below.

[0257] It should be understood that in the embodiment of the present application, the DMRS “located” at a certain symbol may mean that the DMRS occupies the symbol, or may mean that the DMRS is fixed to the symbol, and the embodiment of the present application is not limited thereto.

[0258] Among them, for the first frequency band, there is only one DMRS segment, and the position of the DMRS segment can follow the following Figure 21-24 Corresponding 4 principles.

[0259] It should be understood that the one-segment DMRS can occupy one symbol or two consecutive symbols. For the sake of simplicity of description, the embodiment of the present application only gives an example of the one-segment DMRS occupying one symbol, but the embodiment of the present application is not limited to this.

[0260] It should also be understood that Figure 21-24 For the sake of convenience of explanation, only the position of the DMRS in the first frequency band is drawn, and the position of the DMRS in the second frequency band is not drawn.

[0261] The first principle: Fig.21 As shown, the position of the DMRS segment is located in the middle of all OFDM symbols in the first frequency band. Fig.21 As shown, N represents the number of all OFDM symbols in the first frequency band.

[0262] It should be noted that when the number of symbols in the first frequency band is an even number, the DMRS segment can occupy (N / 2)+1 or (N / 2) symbols. When the number of symbols in the first frequency band is an odd number, the DMRS segment can occupy the middle symbol. For example, when N=7, the DMRS segment occupies the 4th symbol.

[0263] The second principle: Fig. 22 As shown, the position of the 1-segment DMRS is located in the middle symbol of the first area in the first frequency band, wherein the first area includes symbols occupied by data and DMRS. Fig. 22 As shown, N represents the number of symbols occupied by the first area.

[0264] It should be understood that the first area in a certain frequency band in the present application is the symbols occupied by data and DMRS in the frequency band. In order to avoid repetition, they will not be described one by one below.

[0265] The third principle: Fig.23As shown, the position of the 1-segment DMRS adopts the position indicated by the indication information of the front loaded DMRS", wherein the indication information indicates the position of the first segment DMRS when there is no frequency hopping.

[0266] like Fig.23 As shown, the indication information indicates that the front loaded is the 4th symbol (when there is no frequency hopping, the DMRS occupies the 4th symbol), then after the frequency hopping, the DMRS in the first frequency band also occupies the 4th symbol.

[0267] Principle 4: Fig.24 As shown, the position of the DMRS segment is located at the Mth symbol at the beginning of the first region. In practical applications, M can be 1. However, the embodiment of the present application is not limited thereto, for example, M=2, 3, 4 or 5.

[0268] For the second frequency band, there is only one DMRS segment, and the location of the DMRS segment may follow the following seven principles.

[0269] It should be understood that the one-segment DMRS can occupy one symbol or two consecutive symbols. For the sake of simplicity of description, the embodiment of the present application only gives an example of the one-segment DMRS occupying one symbol, but the embodiment of the present application is not limited to this.

[0270] It should also be understood that Figure 25-29 For the sake of convenience in explanation, only the position of the DMRS in the second frequency band is drawn, and the position of the DMRS in the first frequency band is not drawn.

[0271] The first principle: Fig.25 As shown, the position of the 1-segment DMRS is located in the middle of all OFDM symbols in the second frequency band, such as Fig.25 As shown, N represents the number of all OFDM symbols in the first frequency band.

[0272] It should be noted that when the number of symbols in the second frequency band is an even number, the DMRS segment can occupy (N / 2)+1 or (N / 2) symbols. When the number of symbols in the first frequency band is an odd number, the DMRS segment can occupy the middle symbol. For example, when N=7, the DMRS segment occupies the 4th symbol.

[0273] The second principle: Fig.26 As shown, the position of the 1-segment DMRS is located at the middle symbol of the first area in the second frequency band, such as Fig.26 As shown, N represents the number of symbols occupied by the first area.

[0274] The third principle: Fig. 27As shown, the position of the DMRS segment is located at the Mth symbol at the beginning of the first region. In practical applications, M can be 1. However, the embodiment of the present application is not limited thereto, for example, M=2, 3, 4 or 5.

[0275] Principle 4: Fig.28 and Fig.29 As shown, the position of a segment of DMRS in the second frequency band is symmetrical or corresponding to the position of the first segment of DMRS in the first frequency band.

[0276] in, Fig.28 It is shown that the position of a segment of DMRS in the second frequency band in all symbols of the second frequency band is symmetrical to the position of the first DMRS in the first frequency band in all symbols of the first frequency band. Fig.29 It shows that the position of a segment of DMRS in the second frequency band in the first region symbol of the second frequency band is symmetrical with the position of the first DMRS in the first frequency band in all the first region symbols of the first frequency band.

[0277] like Fig.28 As shown, the symmetry here can be overall symmetry, for example, the number of symbols in the first frequency band is equal to that in the second frequency band, and the symbol position occupied by the DMRS in the first frequency band is symmetrical with the symbol position occupied by the DMRS in the second frequency band, for example, both are in the middle position, Fig.28 The first figure in FIG. 1 shows the situation of occupying the middle position. Optionally, as Fig.28 As shown, the symmetry here can be post-symmetry. Specifically, the DMRS in the first frequency band occupies the Xth last symbol position, and the DMRS in the second frequency band also occupies the Xth last symbol position. Fig.28 The middle figure in FIG. 1 shows the case where X=3; alternatively, as Fig.28 As shown, the symmetry here can be front symmetry. Specifically, if the DMRS in the first frequency band occupies the positive X-th symbol position, then the DMRS in the second frequency band also occupies the positive X-th symbol position. Fig.28 The third figure in FIG. 1 shows the case where X=4.

[0278] like Fig.29 As shown, the symmetry here can be post-symmetry. Specifically, the DMRS in the first frequency band occupies the Xth last symbol position, and the DMRS in the second frequency band also occupies the Xth last symbol position. Fig.29 The middle figure in FIG. 1 shows the case where X=4, and the third figure shows the case where X=4; alternatively, as Fig.29 As shown, the symmetry here can be front symmetry. Specifically, if the DMRS in the first frequency band occupies the positive X-th symbol position, then the DMRS in the second frequency band also occupies the positive X-th symbol position. Fig.29 The first figure in FIG. 1 shows the case where X=1.

[0279] The fifth principle: Fig.30 As shown, the position of the 1-segment DMRS adopts the position indicated by the indication information of the additional DMRS, wherein the indication information indicates the position of the additional DMRS when there is no frequency hopping. It should be noted that if there are multiple segments of additional DMRS, the position of the 1-segment DMRS is the same as the Nth segment indicated by the indication information, for example, the same as the first segment. In this way, the position of the 1-segment DMRS can be one of {7,8,10,12,13}.

[0280] The sixth principle is that the position of the DMRS segment is selected from certain specific symbols. For example, if the DMRS segment includes 1 symbol, then the DMRS segment can occupy the 1st symbol, the 3rd symbol or the 5th symbol in the second frequency band, or the DMRS segment can occupy the 8th symbol, the 10th symbol or the 12th symbol in the entire scheduling unit.

[0281] Optionally, the position of the DMRS segment can also be bound to (or have a corresponding relationship with) the frame structure or the symbol position (or the first area position) of the PUSCH. A frame structure or a PUSCH symbol position can correspond to a placement position. The embodiments of the present application are not limited to this.

[0282] The symbol position occupied by the DMRS at end 1 may be configured through signaling, and the embodiments of the present application are not limited to this.

[0283] The seventh principle: the 1-segment DMRS is located N symbols after the first segment DMRS of the first frequency band, for example, N=4 / 6 / 8.

[0284] It should be understood that the above descriptions respectively describe the positions of a DMRS segment in the first frequency band and the second frequency band. In practical applications, the position of the DMRS in type 1 can be formed by any combination of the above, and the embodiments of the present application are not limited thereto. That is, after determining type 1, the network device and the terminal device can determine the DMRS pattern according to a preset rule, that is, a rule of any combination of the above.

[0285] Optionally, in actual applications, the position of the DMRS in type 1 can be configured by the network device to the terminal device through signaling, for example, through RRC, DCI or MAC CE signaling, but the embodiments of the present application are not limited to this.

[0286] For the first frequency band, there are 2 segments of DMRS (corresponding to types 2-I and 2-II), and the positions of the 2 segments of DMRS may follow the following 7 principles.

[0287] It should be understood that each of the two DMRS segments can occupy one symbol or two consecutive symbols. For the sake of simplicity of description, the embodiment of the present application only gives an example in which each DMRS segment occupies one symbol, but the embodiment of the present application is not limited to this.

[0288] It should also be understood that Figure 31-34 For the sake of convenience of explanation, only the position of the DMRS in the first frequency band is drawn, and the position of the DMRS in the second frequency band is not drawn.

[0289] The first principle: Fig.31 As shown, the first segment of the two DMRS segments is fixed at the N1th OFDM symbol from the front in the entire first frequency band; the second segment is fixed at the N2th OFDM symbol from the back in the entire first frequency band.

[0290] The second principle: Fig.32 As shown, the first segment of the two segments of DMRS is fixed to the first region symbol in the first frequency band and counted from the N1th OFDM symbol from the front; the second segment is fixed to the first region symbol in the first frequency band and counted from the N2th OFDM symbol from the back.

[0291] The third principle: Fig.33 As shown, the first segment of the two DMRS segments adopts the position indicated by the indication information of the front loaded DMRS, wherein the indication information indicates the position of the first DMRS segment when there is no frequency hopping. The second segment is fixed to the first region symbol in the first frequency band and counted from the N2th OFDM symbol, for example, N2=1 or 2, 3, etc.

[0292] It should be understood that the front loaded DMRS in this application refers to the first segment DMRS in the resource scheduling unit, which is generally located in the first half of the resource scheduling unit. It should be understood that the front loaded DMRS in this application is equivalent to the front loaded DMRS. Additional DMRS is equivalent to the additional DMRS, which refers to the other segments of DMRS after the front loaded DMRS.

[0293] Principle 4: Fig.34 As shown, the first position of the two DMRS segments adopts the position indicated by the indication information of the front loaded DMRS; the second position adopts the position within the frequency band indicated by the additional DMRS indication information, wherein, when the additional DMRS indication information indicates multiple positions within the frequency band, the second position is the last one of the multiple positions.

[0294] The fifth principle: the first segment of the two segments of DMRS is located in the middle of the entire first frequency band or the first area in the first frequency band; the second segment is fixed to the N2th OFDM symbol from the back of the first area symbol in the first frequency band.

[0295] Principle 6: The first segment of the two DMRS segments is in the same position as the first segment when hopping is not performed; the second segment is fixed to the penultimate 1st, 2nd or 3rd symbol in the first frequency band. Specifically, the position of the second DMRS segment can be bound or corresponded to the frame structure, but the embodiments of the present application are not limited thereto.

[0296] Principle 7: The first segment of the two DMRS segments is fixed in the entire scheduling resource, counting from the N1th OFDM symbol from the front; the second segment is the Nth symbol after the first segment, N = 1 / 2 / 3 / 4.

[0297] For the second frequency band, there are 2 segments of DMRS (corresponding to types 2-I and 2-III), and the positions of the 2 segments of DMRS may follow the following 8 principles.

[0298] The first principle: the first segment of the two DMRS segments is fixed at the N1th OFDM symbol from the front in the entire second frequency band; the second segment is fixed at the N2th OFDM symbol from the back in the entire second frequency band.

[0299] The second principle: the first segment of the two segments of DMRS is fixed to the first region symbol in the second frequency band and counted from the N1th OFDM symbol from the front; the second segment is fixed to the first region symbol in the second frequency band and counted from the N2th OFDM symbol from the back.

[0300] The third principle: Fig.35 As shown, the second segment of the two DMRS segments adopts the position indicated by the indication information of the additional DMRS, wherein the indication information indicates the DMRS position of the frequency band when there is no frequency hopping, wherein when the indication information indicates the position of multiple DMRS segments, the second segment position is the position of the last DMRS segment indicated by the indication information. The first segment is fixed in the first area symbol of the second frequency band, counting from the N1th OFDM symbol, for example, N1=1, 2 or 3, etc.

[0301] The fourth principle: the two DMRS segments adopt the positions indicated by the indication information of the additional DMRS, wherein the indication information indicates the positions of the two DMRS segments in the frequency band when there is no frequency hopping, wherein when the indication information indicates multiple DMRS positions in the frequency band, two positions can be selected as the positions of the two DMRS segments, for example, the first and the last are selected as the positions of the two DMRS segments.

[0302] The fifth principle is that the two DMRS segments are located at predetermined symbol positions. For example, each of the two DMRS segments includes one symbol, then the two DMRS segments may include two symbols among the 1st, 3rd and 5th symbols in the second frequency band, or the two DMRS segments may include two symbols among the 8th, 10th and 12th symbols in the entire resource scheduling unit.

[0303] Optionally, the positions of the two DMRS segments may also be bound to (or have a corresponding relationship with) the frame structure or the symbol position of the PUSCH (or the position of the first area), and a frame structure or a PUSCH symbol position may correspond to a placement position, but the embodiments of the present application are not limited to this.

[0304] The symbol position occupied by the 2-end DMRS can be configured through signaling, and the embodiments of the present application are not limited to this.

[0305] The sixth principle is that the first DMRS segment of the two DMRS segments is located at the first symbol, and the second DMRS segment is located at one of the candidate sets. For example, the second DMRS segment is located at one of the symbols 10 and 12 in the entire scheduling unit, but the embodiments of the present application are not limited thereto.

[0306] Optionally, the position of the second DMRS segment can also be bound to (or have a corresponding relationship with) the frame structure or the symbol position of PUSCH (or the first area position), and a frame structure or a PUSCH symbol position can correspond to a placement position. The embodiments of the present application are not limited to this.

[0307] The seventh principle: the first segment of the two DMRS segments is fixed in the entire second frequency band, counting from the N1th OFDM symbol from the front; the second segment is the Mth symbol after the first segment (M=1 / 2 / 3 / 4).

[0308] Principle 8: The first of the two DMRS segments is located N1 symbols after the first DMRS segment of the first frequency band; the second segment is the Mth symbol after the first segment (N1=2*M; M=1 / 2 / 3 / 4)

[0309] It should be understood that the above respectively describes the position where there is a DMRS segment in the first frequency band and the second frequency band. And the specific position when there are two DMRS segments in the first frequency band and the second frequency band. In practical applications, the position of the DMRS in type 2-I can be any combination of the specific positions when there are two DMRS segments in the first frequency band and the second frequency band, and the embodiments of the present application are not limited to this. That is to say, after determining type 2-I, the network device and the terminal device can determine the DMRS pattern according to the preset rules, that is, one of the above-mentioned arbitrary combinations of rules.

[0310] Similarly, the position of the DMRS in type 2-II can be various combinations of the positions of 2 DMRS for the first frequency band and only 1 DMRS for the second frequency band, and the embodiments of the present application are not limited thereto. That is, after determining type 2-II, the network device and the terminal device can determine the DMRS pattern according to a preset rule, that is, one of the provisions of any combination of the above.

[0311] Similarly, the position of the DMRS in type 2-III can be various combinations of the positions of only one DMRS for the first frequency band and two DMRS for the second frequency band, and the embodiments of the present application are not limited thereto. That is, after determining type 2-III, the network device and the terminal device can determine the DMRS pattern according to a preset rule, that is, one of the provisions of any combination of the above.

[0312] Optionally, in actual applications, the positions of the DMRS in the above three types 2 can be configured to the terminal device by the network device through signaling, for example, through RRC, DCI or MAC CE signaling, but the embodiments of the present application are not limited to this.

[0313] The following takes the uplink transmission in the frequency hopping mode as an example to describe in detail the circumstances under which the above-mentioned Fig. 20 A specific example of which of the four types corresponds to the DMRS pattern for data transmission.

[0314] In order to make the embodiments of the present application easier to understand, before describing the methods of the embodiments of the present application, some terms in the embodiments of the present application are first defined as follows:

[0315] In the embodiment of the present application, the additional DMRS configuration may be implemented by configuring the number of additional DMRSs, the location of the additional DMRSs, or indication information of the additional DMRSs.

[0316] It should be understood that the terminal device can determine the position of the DMRS according to the additional DMRS configuration, and then transmit the DMRS and data.

[0317] It should be understood that in the embodiment of the present application, the additional DMRS configuration parameters can be configured through one or more of RRC, DCI, and MAC CE.

[0318] It should be understood that the additional DMRS configuration parameter in the embodiment of the present application may also be referred to as nearby DMRS indication information. The embodiment of the present application is not limited to this. The additional DMRS represents the DMRS located after the front load DMRS. The additional DMRS indication information or the additional DMRS configuration parameter is used to indicate at least one of the following: whether the additional DMRS exists, the number of the additional DMRS, and the position of the additional DMRS.

[0319] It should be understood that the front load DMRS has only one segment. When the additional DMRS configuration parameter configures the attachment DMRS, the entire resource scheduling unit includes at least two segments of DMRS, wherein the first segment of DMRS is the front load DMRS and the remaining DMRS are attachment DMRS.

[0320] The following first describes the case where the DMRS configuration parameters are configured through RRC.

[0321] Among them, the number of additional DMRS can be configured by the uplink additional DMRS number (UL_DMRS_add_num) or the uplink DMRS number (UL_DMRS_num). For example, UL_DMRS_add_num=0 indicates that there is no additional DMRS; UL_DMRS_add_num=N (N>0), indicating that there are N additional DMRS. UL_DMRS_num=1 indicates that there is no additional DMRS; UL_DMRS_num=N (N>1), indicating that there are N-1 additional DMRS. Optionally, in the embodiment of the present application, the number of additional DMRS can also be indirectly realized by the DMRS type, for example, an index number is given to index a certain type of DMRS, and the type of DMRS implies whether there is additional DMRS and how many additional DMRS there are. In other words, in the embodiment of the present application, a corresponding relationship between the index and the number of DMRS can be established, where one index number corresponds to a type of DMRS number. In practical applications, an index number can be indicated to indicate the number of DMRS corresponding to the index number.

[0322] It should be understood that in the embodiment of the present application, the total number of DMRSs in the DMRS pattern is equal to the number of additional DMRSs plus 1.

[0323] It should be understood that in the embodiment of the present application, after configuring the number of DMRS, the terminal device can determine the position of each DMRS according to preset rules. Optionally, in the embodiment of the present application, the position of each DMRS can also be determined according to the configured additional DMRS position parameters. The embodiment of the present application is not limited to this.

[0324] Optionally, in the embodiment of the present application, the number of symbols occupied by each additional DMRS may be equal to the number of symbols occupied by the first DMRS, but the embodiment of the present application is not limited thereto.

[0325] The additional DMRS position can be configured by the uplink additional DMRS position (UL_DMRS_add_pos) or the uplink DMRS position (UL_DMRS_pos). For example, UL_DMRS_add_pos = {Null} or UL_DMRS_add_pos = {0}, indicating that there is no additional DMRS; UL_DMRS_add_pos = {N1 or N1+N2 or N1+N2+N3} (N1>0, N2>0, N3>0), indicating that there is additional DMRS, wherein the number of non-zero parameters indicates the number of additional DMRS. For example, the above UL_DMRS_add_pos = {N1 or N1+N2 or N1+N2+N3}, respectively indicates that there are 1, 2 or 3 additional DMRS. Among them, N1=3 means that the first additional DMRS is separated from the first DMRS by 3 symbols, or means that the first additional DMRS occupies the third symbol. For example, when the first additional DMRS occupies 2 symbols, when N1=3, the first additional DMRS occupies the third and fourth symbols.

[0326] UL_DMRS_pos = {N1} (e.g., N1 = 2 or 3), that is, there is only one parameter, indicating that there is no additional DMRS. UL_DMRS_pos = {N1+N2 or N1+N2+N3 or N1+N2+N3+N4}, indicating that there is additional DMRS, where the number of non-zero parameters in the UL_DMRS_pos value minus 1 indicates the number of additional DMRS.

[0327] The additional DMRS indication information may be configured through an uplink additional DMRS position (UL_DMRS_add_pos) or an uplink additional DMRS indication (UL_DMRS_add_indication).

[0328] Specifically, as shown in representation 1, in an embodiment of the present application, a one-to-one correspondence between indication information, i.e., UL_DMRS_add_pos / UL_DMRS_add_indication, and a DMRS position may be set. In an embodiment of the present application, a specific value may be indicated by the indication information. For example, as shown in Table 1, the indication information takes a value from 0 to p to indicate the DMRS position corresponding to the value. For example, when the indication information takes a value of 0, the corresponding DMRS position is N0, indicating that there is no additional DMRS, and the DMRS in the front load pattern occupies the N0th symbol ((No add DMRS, FL at N0)); when the indication information takes a value of 3, the corresponding DMRS position is N0+N3, indicating that there is an additional DMRS, and it occupies the N0+N3th symbol (1add DMRS at N0+N3). It should be understood that the N0+N3th symbol represents the first symbol of at least one continuous symbol occupied by the additional DMRS. When the indication information is p, the corresponding DMRS positions are N0+N1, N0+N2, and N0+N3, indicating that there are three additional DMRSs, which occupy the N0+N1th, N0+N2th, and N0+N3th symbols respectively.

[0329] It should be understood that in the embodiment of the present application, different numbers of attachment DMRS may correspond to different tables. The content in the table is of the same type as Table 1 and will not be repeated here. In this way, the corresponding table can be determined by the number of attachment DMRS. The table includes the correspondence between the indication information value and the position of the DMRS. Therefore, the position of the DMRS can be indicated by a specific indication information value.

[0330] Table 1

[0331]

[0332] It should be understood that in the embodiment of the present application, after RRC completes the additional DMRS configuration, it does not mean that the additional DMRS will be triggered or activated. After RRC completes the configuration, the additional DMRS can be triggered in the following three ways.

[0333] The first form is data triggered: RRC completes the additional DMRS configuration. As long as there is data to be sent, there will be additional MDRS, that is, data will be sent according to the additional pattern.

[0334] The second form is MAC CE activation and data triggering: after RRC completes the additional DMRS configuration and MAC CE is activated (for example, when UL_DMRS_add_active=1), additional DMRS is used for sending data; if MAC CE is deactivated (for example, UL_DMRS_add_active=0), there will be no additional DMRS.

[0335] The third form is DCI triggering: after RRC completes the additional DMRS configuration, DCI is triggered (for example, UL_DMRS_add_flag=1), and the data sent has additional DMRS; DCI is not triggered (for example, UL_DMRS_add_flag=0), and the data sent does not have additional DMRS.

[0336] The above describes the method of configuring additional DMRS through RRC configuration. Similarly, in the embodiment of the present application, additional DMRS can also be configured through MAC CE.

[0337] Similar to the configuration through RRC, the additional DMRS can also be configured through MAC CE, and the number of additional DMRS or the position of additional DMRS or the indication information of additional DMRS can be configured through MAC CE to complete the configuration. For the specific configuration signaling form and signaling function, please refer to the corresponding signaling in the RRC configuration, and will not be repeated here to avoid repetition.

[0338] It should be understood that in the embodiment of the present application, after MAC CE completes the additional DMRS configuration, it does not mean that the additional DMRS will be triggered or activated. After RRC completes the configuration, there are two ways to trigger the additional DMRS.

[0339] The first form is data triggered: MAC CE completes the additional DMRS configuration. As long as there is data to be sent, there will be additional MDRS.

[0340] The second form is DCI triggering: MAC CE completes additional DMRS configuration, DCI is triggered (for example, UL_DMRS_add_flag=1), and data is sent with additional DMRS; DCI is not triggered (for example, UL_DMRS_add_flag=0), and data is sent without additional DMRS.

[0341] The above describes the method of configuring additional DMRS through RRC and MAC CE. Similarly, in the embodiment of the present application, additional DMRS can also be configured through DCI.

[0342] Similar to configuration through RRC or MAC CE, configuration of additional DMRS through DCI can be completed by configuring the number of additional DMRS or the location of additional DMRS or indication information of additional DMRS. The specific configuration signaling form and function can refer to the corresponding signaling in RRC configuration, and will not be repeated here to avoid repetition.

[0343] If additional DMRS is configured in DCI, additional DMRS is triggered.

[0344] It should be understood that the corresponding parameters in the additional DMRS configuration in this article can be configured through the signaling itself. Optionally, a one-to-one correspondence (table) between various signaling values ​​and indexes can also be established in an embodiment of the present application. When performing DMRS configuration, the configuration can be achieved directly by configuring the corresponding index number through RRC, MAC CE or DCI.

[0345] The above describes the configuration parameter configuration method and the specific meaning of each configuration parameter in the embodiment of the present application. The following describes how to determine the DMRS pattern in the frequency hopping mode during uplink transmission according to the above configuration parameters in the embodiment of the present application, that is, to determine the pattern in the frequency hopping mode as follows: Fig. 20 The specific type of drawing scheme corresponds to.

[0346] Specifically, the communication device uses the indication information of the additional DMRS to determine the DMRS pattern corresponding to the frequency hopping mode, where the additional DMRS indicates a DMRS located after the front load DMRS, and the indication information is used to indicate at least one of the following: whether the additional DMRS exists, the number of the additional DMRS, and the position of the additional DMRS, and the frequency hopping mode indicates that a part of the symbols in a resource scheduling unit are located in the first frequency band, and another part of the symbols are located in the second frequency band,

[0347] The communication device uses the DMRS pattern to perform DMRS mapping or demapping.

[0348] Optionally, as an embodiment, when the indication information is used to indicate that the additional DMRS does not exist, the DMRS in the DMRS pattern occupies a segment of symbols in the first frequency band and a segment of symbols in the second frequency band, wherein a segment of symbols includes at least one continuous symbol.

[0349] Optionally, as an embodiment, a segment of symbols in the first frequency band includes a first symbol in a first area in the first frequency band, and the first area includes symbols occupied by data and DMRS.

[0350] Optionally, as an embodiment, a segment of symbols in the second frequency band includes the first symbol in the second frequency band.

[0351] Optionally, as an embodiment, when the indication information is used to indicate the presence of the additional DMRS, the number and position of symbol segments occupied by the DMRS in the DMRS pattern in the first frequency band, and the number and position of symbol segments occupied in the second frequency band are the same as the number and position indicated by the indication information when there is no frequency hopping.

[0352] Optionally, as an embodiment, when the indication information is used to indicate the existence of the additional DMRS,

[0353] In the DMRS pattern, DMRS occupies two discontinuous symbol segments in the first frequency band and two discontinuous symbol segments in the second frequency band,

[0354] or,

[0355] In the DMRS pattern, the DMRS occupies two discontinuous symbol segments in the first frequency band and one symbol segment in the second frequency band,

[0356] or,

[0357] In the DMRS pattern, the DMRS occupies a segment of symbols in the first frequency band and two discontinuous segments of symbols in the second frequency band,

[0358] Each of the two segments of symbols includes a continuous indication of a symbol, and the segment of symbols includes at least one continuous symbol.

[0359] Optionally, as an embodiment, when the DMRS in the DMRS pattern occupies two discontinuous symbol segments in the first frequency band, the latter symbol segment of the two symbol segments in the first frequency band includes the last symbol in the first frequency band;

[0360] or,

[0361] When the DMRS in the DMRS pattern occupies two discontinuous symbol segments in the second frequency band, the first symbol segment of the two symbol segments in the second frequency band includes the first symbol in the second frequency band.

[0362] In the following, specific examples are described in detail in conjunction with specific examples to describe specific examples of determining a frequency hopping pattern according to additional DMRS configuration parameters (ie, indication information of additional DMRS) in the embodiments of the present application.

[0363] Case 1:

[0364] The same set of parameters is used for non-frequency hopping and frequency hopping. In other words, no new additional DMRS configuration parameters are required. In frequency hopping mode, regardless of the value of the additional DMRS configuration parameters when not frequency hopping, the pattern after frequency hopping is type 1.

[0365] Specifically, in an embodiment of the present application, the frequency hopping mode can be triggered by signaling, for example, one or more of RRC, DCI, and MAC CE. After the terminal device obtains the signaling that triggers the frequency hopping mode, it can transmit DMRS and data according to type 1.

[0366] Optionally, taking the DCI triggered frequency hopping mode as an example, when the number of signaling is format 0 (format 0), when the resource allocation type is 0 (Resource allocation type=0) and the frequency hopping flag is 1 (Frequency hopping flag=1), the corresponding pattern will adopt type 1.

[0367] It should be understood that in this case, the additional DMRS configuration parameters are effective only when frequency hopping is not performed. That is, the frequency hopping mode is not activated, that is, the additional DMRS configuration parameters are effective only when the signaling number is format 0 (format 0), the resource allocation type is not 0 (Resource allocation type≠0) or there is no resource allocation type (no Resource allocationtype) parameter or the frequency hopping flag is 0 (Frequency hopping flag=0).

[0368] Case 2:

[0369] No frequency hopping and frequency hopping each correspond to their own additional DMRS configuration parameters. In other words, a separate set of additional DMRS configuration parameters is required in the frequency hopping mode.

[0370] In other words, in this case, when frequency hopping is not performed, one set of additional DMRS configuration parameters (which may be referred to as a first set of configuration parameters) is used, and when frequency hopping is performed, another set of additional DMRS configuration parameters (which may be referred to as a second set of configuration parameters) is used.

[0371] It should be understood that the type and function of each set of configuration parameters can be found in the description above, and in order to avoid repetition, they will not be described here.

[0372] Specifically, in an embodiment of the present application, the frequency hopping mode can be triggered by signaling, for example, one or more of RRC, DCI, and MAC CE. After the terminal device obtains the signaling for triggering the frequency hopping mode, it can transmit data according to the second set of configuration parameters.

[0373] Optionally, taking the DCI triggered frequency hopping mode as an example, when the number of signaling is format 0 (format 0), when the resource allocation type is 0 (Resource allocation type=0) and the frequency hopping flag is 1 (Frequency hopping flag=1), the second set of configuration parameters corresponds.

[0374] It should be understood that the first set of configuration parameters is effective when frequency hopping is not performed. That is, the frequency hopping mode is not activated, that is, when the number of signaling is format 0 (format 0), when the resource allocation type is not 0 (Resource allocation type≠0) or when there is no resource allocation type (no Resource allocation type) parameter or the frequency hopping flag is 0 (Frequency hopping flag=0), the first set of configuration parameters is effective.

[0375] It should be understood that in case 2, the second set of configuration parameters may only indicate that the pattern corresponding to the frequency hopping mode is one of two pattern types, that is, the pattern type corresponding to the frequency hopping mode is one of type 1 or type 2.

[0376] The following will illustrate different situations with examples. Among them, in situations 2-1 to 2-3, when the frame structure cannot meet the requirements, that is, when the symbol interval between two DMRS in a frequency band of frequency hopping does not meet the interval requirements, in order to ensure the uniformity of the pattern type, frequency hopping is not performed. In situations 2-4 to 2-6, when the frame structure cannot meet the requirements, that is, when the symbol interval between two DMRS in a frequency band of frequency hopping does not meet the interval requirements, fallback is performed to reduce the number of DMRS in the frequency band to one, thereby ensuring the enabling of frequency hopping.

[0377] Case 2-1,

[0378] The second set of configuration parameters (eg, UL_DMRS_add_type_hopping=0) indicates that the pattern corresponding to the frequency hopping mode is type 1, and the terminal device sends DMRS and data according to the pattern corresponding to type 1 during frequency hopping.

[0379] or,

[0380] The second set of configuration parameters (for example, UL_DMRS_add_type_hopping = 1) indicates that the pattern corresponding to the frequency hopping mode is type 2-I, and the terminal device sends DMRS and data according to the pattern corresponding to type 2-I during frequency hopping. Among them, if the symbol interval between two DMRS in any of the two frequency bands does not meet the interval requirement, the frame structure does not perform frequency hopping. The interval requirement indicates whether the interval data between two DMRS is greater than or equal to the preset interval threshold N. j , where N j The value may be 1, 2, or 3, etc., and the embodiments of the present application are not limited thereto.

[0381] Situation 2-2,

[0382] The second set of configuration parameters (eg, UL_DMRS_add_type_hopping=0) indicates that the pattern corresponding to the frequency hopping mode is type 1, and the terminal device sends DMRS and data according to the pattern corresponding to type 1 during frequency hopping.

[0383] or,

[0384] The second set of configuration parameters (for example, UL_DMRS_add_type_hopping = 1) indicates that the pattern corresponding to the frequency hopping mode is type 2-II, and the terminal device sends DMRS and data according to the pattern corresponding to type 2-II during frequency hopping. If the symbol interval between two DMRS in the first frequency band of the two frequency bands does not meet the interval requirement, the frame structure does not perform frequency hopping. The interval requirement indicates whether the interval data between the two DMRS is greater than or equal to the preset interval threshold N. j , where N j The value may be 1, 2, or 3, etc., and the embodiments of the present application are not limited thereto.

[0385] Case 2-3,

[0386] The second set of configuration parameters (eg, UL_DMRS_add_type_hopping=0) indicates that the pattern corresponding to the frequency hopping mode is type 1, and the terminal device sends DMRS and data according to the pattern corresponding to type 1 during frequency hopping.

[0387] or,

[0388] The second set of configuration parameters (for example, UL_DMRS_add_type_hopping = 1) indicates that the pattern corresponding to the frequency hopping mode is type 2-III, and the terminal device sends DMRS and data according to the pattern corresponding to type 2-III during frequency hopping. If the symbol interval between the two DMRS in the second frequency band of the two frequency bands does not meet the interval requirement, the frame structure does not perform frequency hopping. The interval requirement indicates whether the interval data between the two DMRS is greater than or equal to the preset interval threshold N. j , where N j The value may be 1, 2, or 3, etc., and the embodiments of the present application are not limited thereto.

[0389] It should be understood that the above-mentioned requests 2-1 to 2-3 assume that the network device and the terminal device have pre-stored two pattern types (i.e., type 1, and one of three types 2), wherein, when UL_DMRS_add_type_hopping=0, it corresponds to pattern type 1, and when UL_DMRS_add_type_hopping=1, it corresponds to the other pattern of the two pre-stored pattern types, i.e., the pattern corresponding to one of the three types 2. Optionally, the network device and the terminal device may pre-store three or four of the above-mentioned four pattern types. Taking pre-stored four types as an example, when UL_DMRS_add_type_hopping=0, it corresponds to pattern type 1; when UL_DMRS_add_type_hopping=1, it corresponds to pattern type 2-I; when UL_DMRS_add_type_hopping=2, it corresponds to pattern type 2-II; and when UL_DMRS_add_type_hopping=3, it corresponds to pattern type 2-III.

[0390] Case 2-4,

[0391] The second set of configuration parameters (eg, UL_DMRS_add_type_hopping=0) indicates that the pattern corresponding to the frequency hopping mode is type 1, and the terminal device sends DMRS and data according to the pattern corresponding to type 1 during frequency hopping.

[0392] or,

[0393] The second set of configuration parameters (eg, UL_DMRS_add_type_hopping = 1) indicates that the pattern corresponding to the frequency hopping mode is type 2-I, and both frequency bands meet the DMRS spacing requirements. The terminal device sends DMRS and data according to the pattern corresponding to type 2-I during frequency hopping.

[0394] Alternatively, the second set of configuration parameters (for example, UL_DMRS_add_type_hopping=1) indicates that the pattern corresponding to the frequency hopping mode is type 2-I, and the previous frequency band meets the DMRS interval requirement, and the latter frequency band does not meet the DMRS interval requirement, then when hopping, the terminal device sends DMRS and data according to the pattern corresponding to type 2-II.

[0395] Alternatively, the second set of configuration parameters (for example, UL_DMRS_add_type_hopping=1) indicates that the pattern corresponding to the frequency hopping mode is type 2-I, and the previous frequency band does not meet the DMRS interval requirement, and the latter frequency band meets the DMRS interval requirement, then when hopping, the terminal device sends DMRS and data according to the pattern corresponding to type 2-III.

[0396] Case 2-5,

[0397] The second set of configuration parameters (eg, UL_DMRS_add_type_hopping=0) indicates that the pattern corresponding to the frequency hopping mode is type 1, and the terminal device sends DMRS and data according to the pattern corresponding to type 1 during frequency hopping.

[0398] or,

[0399] The second set of configuration parameters (eg, UL_DMRS_add_type_hopping = 1) indicates that the pattern corresponding to the frequency hopping mode is type 2-II, and the previous frequency band meets the DMRS interval requirement, then the terminal device sends DMRS and data according to the pattern corresponding to type 2-II during frequency hopping.

[0400] Alternatively, the second set of configuration parameters (eg, UL_DMRS_add_type_hopping = 1) indicates that the pattern corresponding to the frequency hopping mode is type 2-II, and the previous frequency band does not meet the DMRS interval requirement, then the terminal device sends DMRS and data according to the pattern corresponding to type 1 during frequency hopping.

[0401] Case 2-6,

[0402] The second set of configuration parameters (eg, UL_DMRS_add_type_hopping=0) indicates that the pattern corresponding to the frequency hopping mode is type 1, and the terminal device sends DMRS and data according to the pattern corresponding to type 1 during frequency hopping.

[0403] or,

[0404] The second set of configuration parameters (eg, UL_DMRS_add_type_hopping = 1) indicates that the pattern corresponding to the frequency hopping mode is type 2-III, and the next frequency band meets the DMRS interval requirement, then the terminal device sends DMRS and data according to the pattern corresponding to type 2-III during frequency hopping.

[0405] Alternatively, the second set of configuration parameters (eg, UL_DMRS_add_type_hopping = 1) indicates that the pattern corresponding to the frequency hopping mode is type 2-II, and the next frequency band does not meet the DMRS interval requirement, then the terminal device sends DMRS and data according to the pattern corresponding to type 1 during frequency hopping.

[0406] Case 3:

[0407] The frequency hopping mode reuses the additional DMRS configuration parameters of the non-frequency hopping mode, and the parameters have the same meaning.

[0408] Specifically, when the additional DMRS configuration parameter configures additional DMRS, that is, when it includes two DMRS segments, the terminal device can frequency hop when sending data, and the position of the DMRS after frequency hopping is the same as the position of the DMRS configured by the additional DMRS configuration parameter without frequency hopping.

[0409] Optionally, taking the DCI triggered frequency hopping mode as an example, when the number of signaling is format 0 (format 0), the resource allocation type is 0 (Resource allocation type=0) and the frequency hopping flag is 1 (Frequency hopping flag=1), and additional DMRS is configured, that is, including at least two DMRS, for example, UL_DMRS_add_num=N (N>0), or UL_DMRS_add_pos={N1 or N1+N2 or N1+N2+N3}(N1>0, N2>0, N3>0), the terminal device uses the frequency hopping mode when sending uplink data.

[0410] Specifically, the DMRS pattern corresponding to the frequency hopping mode is determined by the additional DMRS configuration parameter. That is, the number and position of DMRS in the DMRS pattern corresponding to the frequency hopping mode are the same as the number and position of DMRS configured by the additional DMRS configuration parameter when there is no frequency hopping.

[0411] Optionally, in case three, when the additional DMRS configuration parameter does not configure the additional DMRS, the additional DMRS configuration parameter without frequency hopping can be reused in the embodiment of the present application, for example, the value of the additional DMRS configuration parameter is changed to configure the additional DMRS, and then the frequency hopping is performed according to the changed additional DMRS configuration parameter. Specifically, the DMRS pattern corresponding to the frequency hopping mode is determined by the changed additional DMRS configuration parameter. That is to say, the number and position of DMRS in the DMRS pattern corresponding to the frequency hopping mode are the same as the number and position of DMRS configured by the changed additional DMRS configuration parameter when there is no frequency hopping.

[0412] That is to say, in the case of including two DMRSs, the terminal device can frequency hop when sending data, and the position of the DMRS after frequency hopping is the same as the position of the DMRS configured by the additional DMRS configuration parameters without frequency hopping.

[0413] Case 4:

[0414] The frequency hopping mode reuses the additional DMRS configuration parameters of the non-frequency hopping mode, but the parameters have different meanings.

[0415] Specifically, taking the DCI triggered frequency hopping mode as an example, when the number of signaling is format 0 (format 0), when the resource allocation type is 0 (Resource allocation type=0) and the frequency hopping flag is 1 (Frequency hopping flag=1), if the additional DMRS configuration parameter configures additional DMRS, that is, when two DMRS are included, the frequency hopping mode adopts type 2, for example, type 2-I, type 2-II or type 2-III. If the additional DMRS configuration parameter does not configure additional DMRS, that is, when one DMRS is included, the frequency hopping mode adopts type 1.

[0416] It should be understood that in case 4, if the additional DMRS configuration parameter configures additional DMRS, that is, when two DMRS are included, the frequency hopping mode adopts one of type 2-I, type 2-II and type 2-III.

[0417] The following will illustrate different situations with examples. Among them, in situations 4-1 to 4-3, when the frame structure cannot meet the requirements, that is, when the symbol interval between two DMRS in a frequency band of frequency hopping does not meet the interval requirements, in order to ensure the uniformity of the pattern type, frequency hopping is not performed. In situations 4-4 to 4-6, when the frame structure cannot meet the requirements, that is, when the symbol interval between two DMRS in a frequency band of frequency hopping does not meet the interval requirements, the number of DMRS in the frequency band is reduced to one, thereby ensuring the enabling of frequency hopping.

[0418] Case 4-1,

[0419] The additional DMRS configuration parameter does not configure additional DMRS, that is, when one DMRS is included, after frequency hopping, the corresponding pattern is type 1.

[0420] or,

[0421] The additional DMRS configuration parameter configures additional DMRS, that is, when at least two DMRS are included, after frequency hopping, the corresponding pattern is type 2-I. Among them, if the symbol interval between two DMRS in any of the two frequency bands does not meet the interval requirement, the frame structure does not perform frequency hopping. The interval requirement indicates whether the interval data between two DMRS is greater than or equal to the preset interval threshold N. j , where N j The value may be 1, 2, or 3, etc., and the embodiments of the present application are not limited thereto.

[0422] Case 4-2,

[0423] The additional DMRS configuration parameter does not configure additional DMRS, that is, when one DMRS is included, after frequency hopping, the corresponding pattern is type 1.

[0424] or,

[0425] The additional DMRS configuration parameter configures additional DMRS, that is, when at least two DMRS are included, after frequency hopping, the corresponding pattern is type 2-II. If the symbol interval between two DMRS in the previous frequency band of the two frequency bands does not meet the interval requirement, the frame structure does not perform frequency hopping.

[0426] Case 4-3,

[0427] The additional DMRS configuration parameter does not configure additional DMRS, that is, when one DMRS is included, after frequency hopping, the corresponding pattern is type 1.

[0428] or,

[0429] The additional DMRS configuration parameter configures additional DMRS, that is, when at least two DMRS are included, after frequency hopping, the corresponding pattern is type 2-III. If the symbol interval between two DMRS in the second frequency band of the two frequency bands does not meet the interval requirement, the frame structure does not perform frequency hopping.

[0430] Situation 4-4,

[0431] The additional DMRS configuration parameter does not configure additional DMRS, that is, when one DMRS is included, after frequency hopping, the corresponding pattern is type 1.

[0432] or,

[0433] The additional DMRS configuration parameter configures additional DMRS, that is, when at least two DMRS are included and both frequency bands meet the DMRS spacing requirements, the terminal device sends DMRS and data according to the pattern corresponding to type 2-I during frequency hopping.

[0434] Alternatively, the additional DMRS configuration parameter configures additional DMRS, that is, when at least two DMRS are included, and the previous frequency band meets the DMRS interval requirement, and the latter frequency band does not meet the DMRS interval requirement, the terminal device sends DMRS and data according to the pattern corresponding to type 2-II during frequency hopping.

[0435] Alternatively, the additional DMRS configuration parameter configures additional DMRS, that is, when at least two DMRS are included, and the previous frequency band does not meet the DMRS interval requirement, and the latter frequency band meets the DMRS interval requirement, the terminal device sends DMRS and data according to the pattern corresponding to type 2-III during frequency hopping.

[0436] Case 4-5,

[0437] The additional DMRS configuration parameter does not configure additional DMRS, that is, when one DMRS is included, after frequency hopping, the corresponding pattern is type 1.

[0438] or,

[0439] The additional DMRS configuration parameter configures additional DMRS, that is, when at least two DMRS are included and the previous frequency band meets the DMRS spacing requirement, the terminal device sends DMRS and data according to the pattern corresponding to type 2-II during frequency hopping.

[0440] Alternatively, the additional DMRS configuration parameter configures additional DMRS, that is, when at least two DMRSs are included and the previous frequency band does not meet the DMRS interval requirement, the terminal device sends DMRS and data according to the pattern corresponding to type 1 during frequency hopping.

[0441] Case 4-6,

[0442] The additional DMRS configuration parameter does not configure additional DMRS, that is, when one DMRS is included, after frequency hopping, the corresponding pattern is type 1.

[0443] or,

[0444] The additional DMRS configuration parameter configures additional DMRS, that is, when at least two DMRS are included and the latter frequency band meets the DMRS spacing requirement, the terminal device sends DMRS and data according to the pattern corresponding to type 2-III during frequency hopping.

[0445] Alternatively, the additional DMRS configuration parameter configures additional DMRS, that is, when at least two DMRSs are included and the latter frequency band does not meet the DMRS interval requirement, the terminal device sends DMRS and data according to the pattern corresponding to type 1 during frequency hopping.

[0446] Optionally, in case 4, if no additional DMRS is configured in the additional DMRS configuration parameter, frequency hopping is performed according to the pattern corresponding to type 1.

[0447] When additional DMRS is configured in the additional DMRS configuration parameter, the DMRS pattern is determined according to the configuration parameter. Specifically, the DMRS pattern corresponding to the frequency hopping mode is determined by the additional DMRS configuration parameter. That is to say, the number and position of DMRS in the DMRS pattern corresponding to the frequency hopping mode are the same as the number and position of DMRS configured by the additional DMRS configuration parameter when no frequency hopping occurs.

[0448] It should be understood that in the above cases 1 to 4, after determining to use one of the above 4 types, any one of the multiple patterns corresponding to the type described above can be used, and the present application embodiment does not limit this. The patterns corresponding to each class can be found in the description above, and will not be repeated here.

[0449] The following describes the multiplexing relationship between the DMRS corresponding to the two waveform devices when a device using a single-carrier DFT-s-OFDM waveform and a device using a multi-carrier CP-OFDM waveform are used for multi-user MU.

[0450] CP-OFDM and DFT-s-OFDM can use frequency division multiplexing (FDM) or time division multiplexing (TDM) between the corresponding DMRS. TDM is as follows Fig.36 As shown, FDM Fig.37 That is, in some scenarios, NR supports multiplexing of two waveforms through FDM; in some scenarios, it supports multiplexing of two waveforms through TDM.

[0451] Among them, Fig.36 In (1) and (2), CP-OFDM and DFT-s-OFDM are numbered independently, with multi-carrier using ports 1-12 and multi-carrier using ports 13-16.

[0452] exist Fig.36 In (3), CP-OFDM and DFT-s-OFDM are jointly numbered, sharing ports 1-12.

[0453] exist Fig.37 In (1) and (2), CP-OFDM and DFT-s-OFDM are jointly numbered and share ports 1-12.

[0454] exist Fig.37 In (3), CP-OFDM and DFT-s-OFDM are numbered independently, multi-carrier uses ports 1-12, and single carrier uses ports 13-16.

[0455] Frequency division multiplexing or time division multiplexing can be used between the DMRS corresponding to CP-OFDM and DFT-s-OFDM, which can be implemented in the following two ways.

[0456] Method 1: When the number of CP-OFDM ports is less than or equal to N (for example, N = 2 / 4 / 6), the DMRS between the two waveforms uses FDM. At this time, the symbol position of the DFT-s-OFDM DMRS is the same as that of CP-OFDM; when the number of CP-OFDM ports is greater than or equal to N, the DMRS between the two waveforms uses TDM. The symbol position of the DMRS of DFT-s-OFDM can be in the following four forms:

[0457] The OFDM symbol where the single carrier is located is after the multi-carrier and is adjacent to the multi-carrier (such as Figure 1 shown);

[0458] The OFDM symbol where the single carrier is located is before the multi-carrier and is adjacent to the multi-carrier;

[0459] The OFDM symbol where the single carrier is located is after the multi-carrier and is separated from the multi-carrier by N symbols (N is greater than or equal to 1);

[0460] The OFDM symbol where the single carrier is located is before the multi-carrier and is separated from the multi-carrier by N symbols (N is greater than or equal to 1).

[0461] Method 2: The symbol position of the DMRS of DFT-s-OFDM is configured / indicated by signaling, which implies the multiplexing method between the DMRS of CP-OFDM.

[0462] The location of the single-carrier DMRS is divided into three cases:

[0463] (1) The symbol position of the DMRS of DFT-S-OFDM is directly indicated by signaling (such as RRC, MAC CE, DCI). When the indicated position is the same as the DMRS of CP-OFDM, FDM is used for the DMRS between the two waveforms. When the positions are different, TDM is used for the DMRS between the two waveforms.

[0464] (2) The symbol position of the DMRS of DFT-S-OFDM is implied by the signaling indication (such as RRC, MAC CE, DCI). For example, "0" means that the symbol position of the DMRS of DFT-S-OFDM is the same as that of CP-OFDM, and FDM is used between the two; "1" means that the symbol position of the DMRS of DFT-S-OFDM is adjacent to and subsequent to the symbol position of the DMRS of CP-OFDM;

[0465] (3) The symbol position of the DMRS of DFT-S-OFDM is implied by the port number. For example, the port number of the DMRS of DFT-S-OFDM is 1-12, which means that the symbol position of the DMRS of DFT-S-OFDM is the same as that of the DMRS of CP-OFDM, and FDM is used between the two. When the port number of the DMRS of DFT-S-OFDM is 13-16, it means that it is adjacent to and after the CP-OFDM.

[0466] The following describes the situation of the DMRS pattern corresponding to the current mode of the embodiment of the present application corresponding to the above-mentioned situation 1 and situation 2 when the current mode is the aggregation mode.

[0467] Optionally, as an embodiment, when the current mode is an aggregation mode, the aggregation mode corresponds to Y resource scheduling units aggregated transmission, where Y is an integer greater than or equal to 2; for the above situation 1, in the embodiment of the present application, Fig.14 As shown, in the DMRS pattern corresponding to the current mode, the DMRS occupies at least one continuous symbol in each of the first Y1 resource scheduling units among Y resource scheduling units, where Y1 is an integer greater than or equal to 1 and less than Y. Fig.12 The case where Y=3, Y1=1 is shown.

[0468] Fig.15 It shows that in the existing method, in the aggregation mode, it is still in accordance with Figure 5 The DMRS is transmitted at the position in the preset pattern shown, by Fig.15 It can be seen that the DMRS in the preset DMRS pattern occupies at least one continuous symbol in each of the Y resource scheduling units.

[0469] In case 1, the channel state is relatively stable, and since Y resource scheduling units transmit jointly, the channel states of the Y resource scheduling units are similar, so only a small amount of DMRS needs to be transmitted to achieve data demodulation. Fig.15 If DMRS is transmitted in each resource scheduling unit, it will cause a waste of resources.

[0470] However, in the embodiment of the present application, in the aggregation mode, DMRS only occupies the symbols in the first Y1 resource scheduling units out of the Y aggregate transmissions, thereby reducing the resources occupied by DMRS, avoiding resource waste, and improving network performance.

[0471] Optionally, as an embodiment, when the current mode is the aggregation mode, the aggregation mode corresponds to Y resource scheduling units aggregated transmission, where Y is an integer greater than or equal to 2. Fig.16As shown, in the DMRS pattern corresponding to the current mode, the DMRS occupies L1 group symbols in each resource scheduling unit in Y resource scheduling units, L1 is an integer less than L, wherein the L1 group symbols are not adjacent, and each group of symbols in the L1 group symbols includes at least one continuous symbol, wherein Fig.16 , shows the case where L1=1 and the group of symbols includes one symbol.

[0472] Fig.17 It shows that in the existing method, in the aggregation mode, it is still in accordance with Figure 6 The DMRS is transmitted at the position in the preset pattern shown, by Fig.17 It can be seen that the DMRS in the preset DMRS pattern occupies L groups of symbols in each of Y resource scheduling units, where L is an integer greater than or equal to 2, wherein the L groups of symbols are not adjacent, and each group of the L groups of symbols includes at least one continuous symbol.

[0473] Depend on Fig.17 It can be seen that in the aggregation mode, each resource scheduling unit occupies L groups of symbols in the DMRS. However, in the aggregation mode, multiple resource scheduling units are jointly transmitted. Therefore, the channels of the multiple resource scheduling units of the joint transmission have a certain correlation. Therefore, accurate data demodulation can be achieved with fewer DMRS. Fig.17 Each resource scheduling unit transmits L groups of DMRS, resulting in a waste of resources.

[0474] In the embodiment of the present application, in the aggregation mode, DMRS only occupies the L1 group symbols in each of the Y resource scheduling units of the aggregated transmission, thereby reducing the resources occupied by DMRS, avoiding resource waste, and improving network performance.

[0475] It should be understood that Fig.16 An example where L is 2 is described in the above description, but the embodiments of the present application are not limited thereto. In each resource scheduling unit, DMRS may occupy multiple groups of symbols, for example, 3 groups, 4 groups or more groups of symbols. Similarly, Fig.16 Only the case of L1=1 is shown, but the embodiments of the present application are not limited thereto, as long as L1 is less than L.

[0476] It should be noted that Fig.17 It shows that in the existing method, in the frequency hopping mode, it is still in accordance with Figure 6 The DMRS is transmitted at the position in the preset pattern shown, by Fig.17It can be seen that the distribution of DMRS in the entire aggregated resources is uneven. Since the receiving end needs to use DMRS to demodulate the subsequent data, and the spacing between adjacent DMRS symbols is uneven. When the spacing between adjacent two groups of DMRS symbols is large, after the receiving end receives the previously transmitted DMRS, it needs to demodulate the data after this DMRS. Due to this large spacing, there may be a large fluctuation in the channel state, and there may be a possibility that the data demodulation is not accurate enough. Similarly, when the spacing between adjacent two groups of DMRS symbols is small, the channel state may be relatively stable, and the receiving end device receives another group of DMRS after a short symbol interval, resulting in waste of resources.

[0477] Alternatively, in the embodiments of the present application, as Fig.18 shown, in the DMRS pattern corresponding to the current mode, DMRS occupies L groups of symbols in each of the Y resource scheduling units. The maximum difference in the spacing between any two adjacent groups of symbols among the Y*L groups of symbols occupied by DMRS in the DMRS pattern corresponding to the current mode is S symbols, where S < R. Among them, the maximum difference in the spacing between any two adjacent groups of symbols among the Y*L groups of symbols occupied by DMRS in the preset DMRS pattern is R symbols. For example, as Fig.17 shown, the maximum value of the spacing between two adjacent groups of symbols is 8 symbols, and the minimum value of the spacing between two adjacent groups of symbols is 4 symbols. Therefore, this R = 8 - 4 = 4. As Fig.18 shown, the maximum value of the spacing between two adjacent groups of symbols is 6 symbols, and the minimum value of the spacing between two adjacent groups of symbols is 6 symbols. S = 6 - 6 = 0.

[0478] Therefore, in the embodiments of the present application, in the aggregation mode, the symbol distribution of DMRS in the Y resource scheduling units of the aggregated transmission is relatively uniform, which can improve the demodulation performance, avoid waste of resources, and enhance the network performance.

[0479] It should be understood that in this article, the number of symbols in a group of symbols occupied by DMRS is not limited. This group of symbols may include at least one symbol. For example, it includes 1 symbol, 2 symbols, or 3 symbols, etc. The embodiments of the present application are not limited to this.

[0480] It should be noted that the examples in the above embodiments are only for helping those skilled in the art to understand the embodiments of the present application, rather than limiting the embodiments of the present application to the specific numerical values or specific scenarios illustrated. Those skilled in the art can obviously make various equivalent modifications or changes according to the examples given above, and such modifications or changes also fall within the scope of the embodiments of the present application.

[0481] In the above, the method for transmitting DMRS according to the embodiments of the present application is described in detail in combination with Figures 1 to 18 Below, it will be described in combination with Fig.19The communication device according to the embodiment of the present application is described in detail.

[0482] Fig.19 1 shows a schematic block diagram of a communication device 1900 according to an embodiment of the present application, and the communication device may be a network device or a terminal device. Fig.19 As shown, the communication device 1900 includes: a processor 1910 and a transceiver 1920 .

[0483] The processor is used to determine a current mode of a resource scheduling unit, where the current mode includes a frequency hopping mode or an aggregation mode, where the frequency hopping mode indicates that a part of symbols in a resource scheduling unit are located in a first frequency band, and another part of symbols are located in a second frequency band, and the aggregation mode indicates that multiple resource scheduling units are aggregated for transmission;

[0484] The transceiver is used for mapping or demapping DMRS using a DMRS pattern corresponding to the current mode, wherein a symbol position occupied by DMRS in the DMRS pattern corresponding to the current mode is different from a symbol position occupied by DMRS in a preset DMRS pattern.

[0485] Therefore, the DMRS pattern in the current mode in the embodiment of the present application is different from the preset pattern. The embodiment of the present application can flexibly select the symbol position occupied by the DMRS according to different modes, and thus the embodiment of the present application can meet the requirements of different modes and improve network performance.

[0486] Optionally, as another embodiment, the current mode is a frequency hopping mode,

[0487] The DMRS in the preset DMRS pattern occupies N consecutive symbols in a resource scheduling unit without frequency hopping, where N is an integer greater than or equal to 1;

[0488] In the DMRS pattern corresponding to the current mode, the DMRS occupies N1 consecutive symbols in the first frequency band and N2 consecutive symbols in the second frequency band, where N1 is an integer greater than or equal to 1, and N2 is an integer greater than or equal to 1.

[0489] Optionally, as another embodiment, N1=N2, and positions of the N1 symbols in the first frequency band are symmetrical to positions of the N2 symbols in the second frequency band.

[0490] Optionally, as another embodiment, the N2 symbols include the first symbol in the second frequency band.

[0491] Optionally, as another embodiment, the current mode is a resource frequency hopping mode,

[0492] The DMRS in the preset DMRS pattern occupies M consecutive symbols and K consecutive symbols in a resource scheduling unit without frequency hopping, wherein the M symbols are not adjacent to the K symbols;

[0493] In the DMRS pattern corresponding to the current mode, the DMRS occupies consecutive M1 symbols and consecutive K1 symbols in the symbols of the first frequency band, and consecutive M2 symbols and consecutive K2 symbols in the second frequency band, wherein the M1 symbol is not adjacent to the K1 symbol, and the M2 symbol is not adjacent to the K2 symbol, and M, K, M1, K1, M2, and K2 are integers greater than or equal to 1.

[0494] Optionally, as another embodiment, M1=M2, K1=K2, and the positions of the M1 symbols and the K1 symbols in the first frequency band are symmetrical to the positions of the M2 symbols and the K2 symbols in the second frequency band.

[0495] Optionally, as another embodiment, the M2 symbols include the first symbol in the second frequency band.

[0496] Optionally, as another embodiment, the DMRS in the preset DMRS pattern also occupies P consecutive symbols in the non-frequency hopping resource scheduling unit, and the P symbols are not adjacent to the M symbols and the K symbols;

[0497] The DMRS in the DMRS pattern corresponding to the current mode also occupies consecutive P1 symbols in the symbols of the first frequency band, and consecutive P2 symbols in the second frequency band, wherein the P1 symbol is not adjacent to the M1 symbol and the K1 symbol, and the P2 symbol is not adjacent to the M2 symbol and the K2 symbol, and P, P1, and P2 are integers greater than or equal to 1.

[0498] Optionally, as another embodiment, the current mode is an aggregation mode, the number of the multiple resource scheduling units is Y, and Y is an integer greater than or equal to 2;

[0499] In the preset DMRS pattern, the DMRS occupies at least one continuous symbol in each resource scheduling unit in Y resource scheduling units.

[0500] In the DMRS pattern corresponding to the current mode, the DMRS occupies at least one continuous symbol in each of the first Y1 resource scheduling units among Y resource scheduling units, where Y1 is an integer greater than or equal to 1 and less than Y.

[0501] Optionally, as another embodiment, the current mode is an aggregation mode, the number of the plurality of resource scheduling units is Y,

[0502] The DMRS in the preset DMRS pattern occupies L groups of symbols in each resource scheduling unit in Y resource scheduling units, where L is an integer greater than or equal to 2, wherein the L groups of symbols are not adjacent, and each group of symbols in the L groups of symbols includes at least one continuous symbol;

[0503] In the DMRS pattern corresponding to the current mode, the DMRS occupies L1 group symbols in each of Y resource scheduling units, where L1 is an integer less than L, wherein the L1 group symbols are not adjacent, and each group of the L1 group symbols includes at least one continuous symbol.

[0504] Optionally, as another embodiment, the current mode is an aggregation mode, the number of the plurality of resource scheduling units is Y,

[0505] The DMRS in the preset DMRS pattern occupies L groups of symbols in each resource scheduling unit in Y resource scheduling units, and the DMRS in the DMRS pattern corresponding to the current mode occupies L groups of symbols in each resource scheduling unit in Y resource scheduling units, wherein L is an integer greater than or equal to 2, wherein the L groups of symbols are not adjacent, and each group of symbols in the L groups of symbols includes at least one continuous symbol,

[0506] The maximum difference between the spacings of any two adjacent groups of symbols in the Y*L groups of symbols occupied by DMRS in the preset DMRS pattern is R symbols, and the maximum difference between the spacings of any two adjacent groups of symbols in the Y*L groups of symbols occupied by DMRS in the DMRS pattern corresponding to the current mode is S symbols, S <R。

[0507] Optionally, as another embodiment, the communication device is a network device, and the transceiver is further used to send first indication information to the terminal device, and the first indication information is used by the terminal device to determine the current mode of the resource scheduling unit.

[0508] Optionally, as another embodiment, the communication device is a network device, and the transceiver is further used to send second indication information to the terminal device, where the second indication information is used to indicate a DMRS pattern corresponding to the current mode.

[0509] Optionally, as another embodiment, the communication device is a terminal device, and the transceiver is further used to receive first indication information sent by the network device, where the first indication information is used by the terminal device to determine a current mode of the resource scheduling unit;

[0510] The processor is specifically used to determine the current mode according to the first indication information.

[0511] Optionally, as another embodiment, the communication device is a terminal device, and the transceiver is further used to receive second indication information sent by the network device, where the second indication information is used to indicate a DMRS pattern corresponding to the current mode.

[0512] Therefore, the DMRS pattern in the current mode in the embodiment of the present application is different from the preset pattern. The embodiment of the present application can flexibly select the symbol position occupied by the DMRS according to different modes, and thus the embodiment of the present application can meet the requirements of different modes and improve network performance.

[0513] It should be understood that Fig.19 The communication device 1900 shown is capable of implementing Figures 1 to 18 The method embodiment involves various processes of a network device or a terminal device. The operations and / or functions of each module in the communication device 1900 are respectively to implement the corresponding processes in the above method embodiment. For details, please refer to the description in the above method embodiment. To avoid repetition, the detailed description is appropriately omitted here.

[0514] It should be understood that the processor 1910 in the embodiment of the present application can be implemented by a processing unit or a chip. Optionally, the transceiver 1920 can be composed of a transmitter or a receiver, or composed of a transceiver unit. The embodiment of the present application is not limited to this.

[0515] It should be noted that the processor in the embodiment of the present application (for example, Fig.19The processor 1910 in the embodiment of the present invention may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above method embodiment may be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software. The above processor may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed by a hardware decoding processor, or may be executed by a combination of hardware and software modules in a decoding processor. The software module may be located in a mature storage medium in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0516] It can be understood that the memory in the embodiment of the present application (for example, Fig.19The memory 1930 in the memory 1930 may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Among them, the nonvolatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0517] An embodiment of the present application further provides a computer-readable medium on which a computer program is stored. When the computer program is executed by a computer, the method for transmitting DMRS in any of the above method embodiments is implemented.

[0518] An embodiment of the present application further provides a computer program product, which, when executed by a computer, implements the method for transmitting DMRS in any of the above method embodiments.

[0519] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0520] An embodiment of the present application further provides a processing device, including a processor and an interface; the processor is used to execute the method for transmitting DMRS in any of the above method embodiments.

[0521] It should be understood that the above-mentioned processing device can be a chip, and the processor can be implemented by hardware or by software. When implemented by hardware, the processor can be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor can be a general-purpose processor, which is implemented by reading the software code stored in the memory. The memory can be integrated in the processor or can be located outside the processor and exist independently.

[0522] It should be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0523] In addition, the terms "system" and "network" are often used interchangeably in this article. The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0524] It should be understood that in the embodiment of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A, and B can also be determined according to A and / or other information.

[0525] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0526] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0527] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, or can be electrical, mechanical or other forms of connection.

[0528] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0529] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0530] Through the description of the above embodiments, it is clear to the technicians in the field that the present application can be implemented by hardware, firmware, or a combination thereof. When software is used for implementation, the above functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein the communication media include any medium that facilitates the transmission of a computer program from one place to another. The storage medium can be any available medium that a computer can access. Take this as an example but not limited to: the computer-readable medium can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer. In addition. Any connection can be appropriately a computer-readable medium. For example, if the software is transmitted from a website, a server or other remote source using a coaxial cable, an optical fiber cable, a twisted pair, a digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwaves, then the coaxial cable, optical fiber cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwaves are included in the fixing of the medium. As used in this application, disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and blue-ray disc, wherein disk usually reproduces data magnetically, while disc uses laser to reproduce data optically. The above combinations should also be included in the scope of protection of computer-readable media.

[0531] In short, the above is only a preferred embodiment of the technical solution of this application, and is not intended to limit the protection scope of this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application should be included in the protection scope of this application.

Claims

1. A method for transmitting a demodulation reference signal DMRS, characterized in that: include: Determine a DMRS pattern corresponding to the frequency hopping mode according to the additional DMRS configuration parameters; The additional DMRS represents other segment DMRS located after the front load DMRS, the DMRS configuration parameter is used to indicate at least one of the following: whether the additional DMRS exists, the number of the additional DMRS and the position of the additional DMRS, and the frequency hopping mode indicates that a part of the symbols in a resource scheduling unit are located in the first frequency band, and another part of the symbols are located in the second frequency band; The DMRS pattern is used to perform DMRS mapping or demapping.

2. The method according to claim 1, characterized in that In the frequency hopping mode and the non-frequency hopping mode, the same additional DMRS configuration parameters are used, and the number of DMRS segments in the determined DMRS pattern is different.

3. The method according to claim 1, characterized in that No additional DMRS is configured in the additional DMRS configuration parameter, and in the DMRS pattern corresponding to the frequency hopping mode, there is only one DMRS segment in the first frequency band and the second frequency band.

4. The method according to claim 1, characterized in that When the additional DMRS is configured in the additional DMRS configuration parameter, in the DMRS pattern corresponding to the frequency hopping mode, the first frequency band and the second frequency band each have one or two DMRS segments.

5. The method according to claim 4, characterized in that When the first frequency band or the second frequency band does not meet the DMRS interval requirement, the first frequency band or the second frequency band only includes one segment of DMRS.

6. The method according to claim 3 or 5, characterized in that A segment of DMRS in the second frequency band is located in the first symbol of the second frequency band.

7. The method according to claim 6, characterized in that When the first frequency band or the second frequency band meets the DMRS interval requirement, the first frequency band or the second frequency band includes two DMRS segments.

8. The method according to claim 7, characterized in that The second DMRS segment in the first frequency band or the second frequency band that meets the DMRS spacing requirement is located at the fourth symbol after the first DMRS segment.

9. The method according to claim 7 or 8, characterized in that The first DMRS segment of the second frequency band is located in the first symbol of the second frequency band.

10. The method according to claim 1, characterized in that When an additional DMRS is configured in the additional DMRS configuration parameter, when the first frequency band or the second frequency band does not meet the DMRS interval requirement, determining not to hop frequency; or When the first frequency band and the second frequency band meet the DMRS interval requirement, the first frequency band and the second frequency band each include two DMRS segments.

11. The method according to any one of claims 5, 7, 8 or 10, characterized in that The DMRS spacing requirement is that there are three symbols between two DMRS segments in the frequency band.

12. The method according to any one of claims 1 to 5, characterized in that The front load DMRS is the first segment DMRS in the resource scheduling unit.

13. The method according to any one of claims 1 to 5, characterized in that The one resource scheduling unit occupies 14 symbols.

14. A method for transmitting a demodulation reference signal DMRS, characterized in that: include: Determine a DMRS pattern corresponding to a frequency hopping mode; The frequency hopping mode indicates that a part of symbols in a resource scheduling unit are located in a first frequency band, and another part of symbols are located in a second frequency band; Sending an additional DMRS configuration parameter corresponding to the DMRS pattern to the terminal device; the DMRS configuration parameter is used to indicate at least one of the following: whether there is an additional DMRS, the number of the additional DMRSs and the position of the additional DMRS, the additional DMRS represents other segment DMRSs located after the front load DMRS; The DMRS pattern is used to demap the DMRS.

15. The method according to claim 14, characterized in that In the frequency hopping mode and the non-frequency hopping mode, the same additional DMRS configuration parameters are used, and the number of DMRS segments in the determined DMRS pattern is different.

16. The method according to claim 14, characterized in that No additional DMRS is configured in the additional DMRS configuration parameter, and in the DMRS pattern corresponding to the frequency hopping mode, there is only one DMRS segment in the first frequency band and the second frequency band.

17. The method according to claim 14, characterized in that When the additional DMRS is configured in the additional DMRS configuration parameter, in the DMRS pattern corresponding to the frequency hopping mode, the first frequency band and the second frequency band each have one or two DMRS segments.

18. The method according to claim 17, characterized in that When the first frequency band or the second frequency band does not meet the DMRS interval requirement, the first frequency band or the second frequency band only includes one segment of DMRS.

19. The method according to claim 16 or 18, characterized in that A segment of DMRS in the second frequency band is located in the first symbol of the second frequency band.

20. The method of claim 19, wherein: When the first frequency band or the second frequency band meets the DMRS interval requirement, the first frequency band or the second frequency band includes two DMRS segments.

21. The method of claim 20, wherein: The second DMRS segment in the first frequency band or the second frequency band that meets the DMRS spacing requirement is located at the fourth symbol after the first DMRS segment.

22. The method according to claim 20 or 21, characterized in that The first DMRS segment of the second frequency band is located in the first symbol of the second frequency band.

23. The method of claim 14, wherein: When an additional DMRS is configured in the additional DMRS configuration parameter, when the first frequency band or the second frequency band does not meet the DMRS interval requirement, determining not to hop frequency; or When the first frequency band and the second frequency band meet the DMRS interval requirement, the first frequency band and the second frequency band each include two DMRS segments.

24. The method of any one of claims 18, 20, 21 or 23, wherein: The DMRS spacing requirement is that there are three symbols between two DMRS segments in the frequency band.

25. The method according to any one of claims 14 to 18, characterized in that The front load DMRS is the first segment DMRS in the resource scheduling unit.

26. The method according to any one of claims 14 to 18, characterized in that The one resource scheduling unit occupies 14 symbols.

27. A method for transmitting a demodulation reference signal DMRS, characterized in that: include: Receiving additional demodulation reference signal DMRS configuration parameters; The additional DMRS configuration parameter is used to indicate at least one of the following: whether there is an additional DMRS, the number of the additional DMRSs and the position of the additional DMRS, wherein the additional DMRS represents other segment DMRSs located after the front load DMRS; Determine a DMRS pattern corresponding to a frequency hopping mode according to the received additional DMRS configuration parameter; the frequency hopping mode indicates that a portion of symbols in a resource scheduling unit are located in a first frequency band, and another portion of symbols are located in a second frequency band; DMRS mapping is performed according to the DMRS pattern.

28. The method of claim 27, wherein: In the frequency hopping mode and the non-frequency hopping mode, the same additional DMRS configuration parameters are used, and the number of DMRS segments in the determined DMRS pattern is different.

29. The method of claim 27, wherein: No additional DMRS is configured in the additional DMRS configuration parameter, and in the DMRS pattern corresponding to the frequency hopping mode, there is only one DMRS segment in the first frequency band and the second frequency band.

30. The method of claim 27, wherein: When the additional DMRS is configured in the additional DMRS configuration parameter, in the DMRS pattern corresponding to the frequency hopping mode, the first frequency band and the second frequency band each have one or two DMRS segments.

31. The method of claim 30, wherein: When the first frequency band or the second frequency band does not meet the DMRS interval requirement, the first frequency band or the second frequency band only includes one segment of DMRS.

32. The method according to claim 29 or 31, characterized in that A segment of DMRS in the second frequency band is located in the first symbol of the second frequency band.

33. The method of claim 30, wherein: When the first frequency band or the second frequency band meets the DMRS interval requirement, the first frequency band or the second frequency band includes two DMRS segments.

34. The method of claim 33, wherein: The second DMRS segment in the first frequency band or the second frequency band that meets the DMRS spacing requirement is located at the fourth symbol after the first DMRS segment.

35. The method according to claim 33 or 34, characterized in that The first DMRS segment of the second frequency band is located in the first symbol of the second frequency band.

36. The method of claim 27, wherein: When an additional DMRS is configured in the additional DMRS configuration parameter, when the first frequency band or the second frequency band does not meet the DMRS interval requirement, determining not to hop frequency; or When the first frequency band and the second frequency band meet the DMRS interval requirement, the first frequency band and the second frequency band each include two DMRS segments.

37. The method of any one of claims 31, 33, 34 or 36, wherein: The DMRS spacing requirement is that there are three symbols between two DMRS segments in the frequency band.

38. The method according to any one of claims 27 to 31, characterized in that The front load DMRS is the first segment DMRS in the resource scheduling unit.

39. The method according to any one of claims 27 to 31, characterized in that The one resource scheduling unit occupies 14 symbols.

40. A communication device, characterized in that: Including processing unit and transceiver unit: a processing unit, configured to determine a demodulation reference signal DMRS pattern corresponding to a frequency hopping mode according to an additional DMRS configuration parameter, wherein the additional DMRS represents other segment DMRSs located after the front load DMRS, wherein the DMRS configuration parameter is used to indicate at least one of the following: whether the additional DMRS exists, the number of the additional DMRSs, and the position of the additional DMRSs, and the frequency hopping mode represents that a part of symbols in a resource scheduling unit are located in a first frequency band, and another part of symbols are located in a second frequency band; The processing unit is further configured to perform DMRS mapping or demapping according to the DMRS pattern.

41. The communication device according to claim 40, characterized in that The processing unit uses the same additional DMRS configuration parameter in the frequency hopping mode and the non-frequency hopping mode, and determines that the number of DMRS segments in the DMRS pattern is different.

42. The communication device according to claim 40, characterized in that No additional DMRS is configured in the additional DMRS configuration parameter, and in the DMRS pattern corresponding to the frequency hopping mode determined by the processing unit, there is only one DMRS segment in the first frequency band and the second frequency band.

43. The communication device according to claim 40, characterized in that When an additional DMRS is configured in the additional DMRS configuration parameter, in the DMRS pattern corresponding to the frequency hopping mode determined by the processing unit, the first frequency band and the second frequency band each have one or two DMRS segments.

44. The communication device according to claim 43, characterized in that When the first frequency band or the second frequency band does not meet the DMRS interval requirement, the first frequency band or the second frequency band only includes one segment of DMRS.

45. The communication device according to claim 42 or 44, characterized in that A segment of DMRS in the second frequency band is located in the first symbol of the second frequency band.

46. ​​The communication device according to claim 43, characterized in that When the first frequency band or the second frequency band meets the DMRS interval requirement, the first frequency band or the second frequency band includes two DMRS segments.

47. The communication device according to claim 46, characterized in that The second DMRS segment in the first frequency band or the second frequency band that meets the DMRS spacing requirement is located at the fourth symbol after the first DMRS segment.

48. The communication device according to claim 46 or 47, characterized in that The first DMRS segment of the second frequency band is located in the first symbol of the second frequency band.

49. The communication device according to claim 40, characterized in that When an additional DMRS is configured in the additional DMRS configuration parameter, and when the first frequency band or the second frequency band does not meet the DMRS interval requirement, the processor determines not to hop frequency; or When the first frequency band and the second frequency band meet the DMRS interval requirement, the processor determines that the first frequency band and the second frequency band each include two DMRS segments.

50. The communication device according to any one of claims 44, 46, 47 or 49, characterized in that: The DMRS spacing requirement is that there are three symbols between two DMRS segments in the frequency band.

51. The communication device according to any one of claims 40 to 44, characterized in that: The front load DMRS is the first segment DMRS in the resource scheduling unit.

52. The communication device according to any one of claims 40 to 44, characterized in that: The one resource scheduling unit occupies 14 symbols.

53. A communication device, characterized in that: Including processing unit and transceiver unit: The processing unit is used to determine a demodulation reference signal DMRS pattern corresponding to a frequency hopping mode, wherein the frequency hopping mode indicates that a part of symbols in a resource scheduling unit are located in a first frequency band, and another part of symbols are located in a second frequency band; The transceiver unit is used to send an additional DMRS configuration parameter corresponding to the DMRS pattern to the terminal device; the additional DMRS configuration parameter is used to indicate at least one of the following: whether there is an additional DMRS, the number of the additional DMRS and the position of the additional DMRS; the additional DMRS represents other segment DMRS located after the front load DMRS; The processing unit is further configured to demap the DMRS according to the DMRS pattern.

54. The communication device according to claim 53, characterized in that The processing unit uses the same additional DMRS configuration parameter in the frequency hopping mode and the non-frequency hopping mode, and determines that the number of DMRS segments in the DMRS pattern is different.

55. The communication device according to claim 53, characterized in that No additional DMRS is configured in the additional DMRS configuration parameter, and in the DMRS pattern corresponding to the frequency hopping mode determined by the processing unit, there is only one DMRS segment in the first frequency band and the second frequency band.

56. The communication device according to claim 53, characterized in that When an additional DMRS is configured in the additional DMRS configuration parameter, in the DMRS pattern corresponding to the frequency hopping mode determined by the processing unit, the first frequency band and the second frequency band each have one or two DMRS segments.

57. The communication device according to claim 56, characterized in that When the first frequency band or the second frequency band does not meet the DMRS interval requirement, the first frequency band or the second frequency band only includes one segment of DMRS.

58. The communication device according to claim 55 or 57, characterized in that: A segment of DMRS in the second frequency band is located in the first symbol of the second frequency band.

59. The communication device according to claim 56, characterized in that When the first frequency band or the second frequency band meets the DMRS interval requirement, the first frequency band or the second frequency band includes two DMRS segments.

60. The communication device according to claim 59, characterized in that The second DMRS segment in the first frequency band or the second frequency band that meets the DMRS spacing requirement is located at the fourth symbol after the first DMRS segment.

61. The communication device according to claim 59 or 60, characterized in that: The first DMRS segment of the second frequency band is located in the first symbol of the second frequency band.

62. The communication device according to claim 53, characterized in that When an additional DMRS is configured in the additional DMRS configuration parameter, and when the first frequency band or the second frequency band does not meet the DMRS interval requirement, the processor determines not to hop frequency; or When the first frequency band and the second frequency band meet the DMRS interval requirement, the processor determines that the first frequency band and the second frequency band each include two DMRS segments.

63. The communication device according to any one of claims 57, 59, 60 or 62, characterized in that: The DMRS interval requirement is that there are three symbols between two DMRS segments of the frequency band.

64. The communication device according to any one of claims 53 to 57, characterized in that: The front load DMRS is the first segment DMRS in the resource scheduling unit.

65. The communication device according to any one of claims 53 to 57, characterized in that: The one resource scheduling unit occupies 14 symbols.

66. A communication device, characterized in that: Including processing unit and receiving unit: The receiving unit is used to receive an additional demodulation reference signal DMRS configuration parameter; the additional DMRS configuration parameter is used to indicate at least one of the following: whether there is an additional DMRS, the number of the additional DMRS and the position of the additional DMRS, and the additional DMRS represents other segment DMRS located after the front load DMRS; The processing unit is configured to determine a DMRS pattern corresponding to a frequency hopping mode using the additional DMRS configuration parameters received by the receiving unit; the frequency hopping mode indicates that a portion of symbols in a resource scheduling unit are located in a first frequency band, and another portion of symbols are located in a second frequency band; The processing unit is further configured to perform DMRS mapping according to the DMRS pattern.

67. The communication device according to claim 66, characterized in that The processing unit uses the same additional DMRS configuration parameter in the frequency hopping mode and the non-frequency hopping mode, and determines that the number of DMRS segments in the DMRS pattern is different.

68. The communication device according to claim 66, characterized in that No additional DMRS is configured in the additional DMRS configuration parameter, and in the DMRS pattern corresponding to the frequency hopping mode determined by the processing unit, there is only one DMRS segment in the first frequency band and the second frequency band.

69. The communication device according to claim 66, characterized in that When an additional DMRS is configured in the additional DMRS configuration parameter, in the DMRS pattern corresponding to the frequency hopping mode determined by the processing unit, the first frequency band and the second frequency band each have one or two DMRS segments.

70. The communication device according to claim 69, characterized in that When the first frequency band or the second frequency band does not meet the DMRS interval requirement, the first frequency band or the second frequency band only includes one segment of DMRS.

71. The communication device according to claim 69 or 70, characterized in that A segment of DMRS in the second frequency band is located in the first symbol of the second frequency band.

72. The communication device according to claim 69, characterized in that When the first frequency band or the second frequency band meets the DMRS interval requirement, the first frequency band or the second frequency band includes two DMRS segments.

73. The communication device according to claim 72, characterized in that The second DMRS segment in the first frequency band or the second frequency band that meets the DMRS spacing requirement is located at the fourth symbol after the first DMRS segment.

74. The communication device according to claim 72 or 73, characterized in that The first DMRS segment of the second frequency band is located in the first symbol of the second frequency band.

75. The communication device of claim 66, wherein: When an additional DMRS is configured in the additional DMRS configuration parameter, and when the first frequency band or the second frequency band does not meet the DMRS interval requirement, the processor determines not to hop frequency; or When the first frequency band and the second frequency band meet the DMRS interval requirement, the processor determines that the first frequency band and the second frequency band each include two DMRS segments.

76. The communication device according to any one of claims 70, 72, 73 or 75, characterized in that The DMRS interval requirement is that there are three symbols between two DMRS segments of the frequency band.

77. The communication device according to any one of claims 66 to 70, characterized in that: The front load DMRS is the first segment DMRS in the resource scheduling unit.

78. The communication device according to any one of claims 66 to 70, characterized in that: The one resource scheduling unit occupies 14 symbols.

79. A processing device, characterized in that The processing device comprises at least one circuit for executing the method of any one of claims 1-39.

80. A computer-readable storage medium, characterized in that The computer-readable storage medium stores instructions, and when the instructions are executed on a processing component of a computer, the processing component is caused to execute the method according to any one of claims 1 to 39.

81. A chip, characterized in that: The chip includes a programmable logic circuit and program instructions, or a programmable logic circuit or program instructions, and is used to implement the method described in any one of claims 1-39 when the chip is running.

82. A computer program product, characterized in that When the computer program product is executed by a computer, the method according to any one of claims 1 to 39 is implemented.

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