WO2019015587A1

WO2019015587A1 - Method for transmitting dmrs, and communication device

Info

Publication number: WO2019015587A1
Application number: PCT/CN2018/095989
Authority: WO
Inventors: 葛士斌; 任翔; 毕晓艳
Original assignee: 华为技术有限公司
Priority date: 2017-07-17
Filing date: 2018-07-17
Publication date: 2019-01-24
Also published as: CN109039566A; CN108809612A; CN109039566B; CN108809612B

Abstract

Provided in the present application are a method for transmitting DMRS and a communication device, said method comprising: a communication device determines the current mode of a resource scheduling unit, the current modes including a frequency hopping mode or an agglomeration mode, the frequency hopping mode indicating that one part of the symbols in the resource scheduling unit is located in a first frequency band and the other part of the symbols is located in a second frequency band, and the agglomeration mode indicating the aggregate transmission of a plurality of resource scheduling units; the communication device uses a DMRS pattern corresponding to the current mode to perform DMRS mapping or demapping, the symbol position occupied by the DMRS in the DMRS pattern corresponding to the current mode being different to the symbol position occupied by the DMRS in a preset DMRS pattern. The embodiments of the present application can flexibly select the symbol location occupied by the DMRS on the basis of different modes, and the embodiments of the present application can therefore meet the requirements of different modes, enhancing network performance.

Description

Method and communication device for transmitting DMRS

This application is required to be submitted to the China Patent Office on September 8, 2017, the application number is 201710808095.3, the Chinese patent application entitled "Method and Communication Equipment for Transmission of DMRS", and the Chinese Patent Application on July 17, 2017 The priority of the Chinese Patent Application No. 201710583011.0, the entire disclosure of which is incorporated herein by reference.

Technical field

The present application relates to the field of communications and, more particularly, to a method and communication device for transmitting a DMRS.

Background technique

In the existing communication system, when transmitting data, the transmitting device (for example, the terminal device in the uplink transmission and the network device in the downlink transmission) needs to send a demodulation reference signal (DMRS) for the receiving end. The device (for example, a network device in uplink transmission and a terminal device in downlink transmission) demodulates the data according to DMRS.

Generally, the sender device sends the DMRS according to the preset DMRS pattern. For example, in a long term evolution (LTE) system, for example, for a normal cyclic prefix, a DMRS for physical uplink shared channel (PUSCH) demodulation is usually fixedly occupied. The fourth symbol (symbol) and the eleventh symbol of the resource scheduling unit. For another example, there is a need for fast feedback in a new radio (NR) system. Therefore, in the NR system, in the DMRS pattern, the DMRS fixedly occupies the front loading of the source scheduling unit.

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

However, when the mode of the resource scheduling unit changes, if the DMRS is still transmitted in the manner of fixed transmission DMRS according to the preset DMRS pattern, the DMRS resource is wasted or the demodulation performance of the receiving end is poor, which affects the network performance. .

Summary of the invention

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

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

The communication device determines a current mode of the 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 one resource scheduling unit is located in the first frequency band, and another part of the symbol is located in the second frequency band, where the aggregation mode indicates The plurality of resource scheduling units aggregate the transmission; the communication device performs mapping or demapping of the DMRS by using the DMRS pattern corresponding to the current mode, where the symbol position occupied by the DMRS in the DMRS pattern corresponding to the current mode is in the preset DMRS pattern. The symbol positions occupied by the DMRS are different.

It should be understood that the method can be performed by a communication device, which can be a network device or a terminal device.

It should be understood that, in the embodiment of the present application, a symbol indicates a time unit, and a symbol in the present disclosure may also be referred to as an OFDM symbol, and the embodiment of the present application is not limited thereto.

It should also be understood that a resource unit in the embodiment of the present application may include n symbols, and n is an integer greater than or equal to 2. For example, n is 7, 14 or any one of 2-13. Not limited to this.

It should be understood that, in the embodiment of the present application, the DMRS pattern may also be referred to as a DMRS distribution information or a DMRS attribute, and the DMRS pattern can represent the symbol position and the number of symbols occupied by the DMRS, and the embodiment of the present application is not limited thereto.

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

For example, the communication device is a network device, and when performing uplink transmission, the communication device performs demapping of the DMRS by using the DMRS pattern corresponding to the current mode; when performing downlink transmission, the communication device performs DMRS using the DMRS pattern corresponding to the current mode. Mapping. For example, the communication device is a terminal device. When performing uplink transmission, the communication device uses the DMRS pattern corresponding to the current mode to perform DMRS mapping. When performing downlink transmission, the communication device performs DMRS using the DMRS pattern corresponding to the current mode. Demap.

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 indicates the DMRS pattern used in the first mode (ie, non-frequency hopping and non-aggregation mode).

In the prior art, regardless of the transmission mode, the 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 transmitted according to the existing fixed transmission DMRS, the distribution mode of the DMRS in the preset DMRS pattern is difficult to meet the needs of different modes. Therefore, the DMRS resources are wasted or the demodulation performance of the receiving end is poor, which affects network performance.

The pattern of the DMRS in the different modes 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 the embodiment of the present application can satisfy different modes. Requirements to improve network performance.

When the communication device is a network device, the network device can determine the current mode according to various ways.

Optionally, the network device may determine the current mode according to the channel state information reported by the terminal device and the network state of the cell.

Optionally, the network device may determine the current mode according to a 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 embodiment of the present application is not limited thereto. For example, when the terminal device uses a single carrier, the current mode may also be an aggregation mode.

Alternatively, the network device can determine the current mode according to the type of service. The service type may include a service that needs to be quickly demodulated or a service that requires high transmission performance.

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 of 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.

Optionally, as an implementation manner of the first aspect, the communications device is a network device, the method further includes: the communications device sending, to the terminal device, first indication information, where the first indication information is used by the terminal device to determine resource scheduling The current mode of the unit.

Optionally, as an implementation manner of the first aspect, the communications device is a network device, the method further includes: the communications device sending the second indication information to the terminal device, where the second indication information is used to indicate that the current mode corresponds to DMRS pattern.

When the communication device is a terminal device, the terminal device can determine the current mode according to various manners.

Optionally, the terminal device may determine the current mode according to the indication of the network device. Specifically, the terminal device may receive the first indication information sent by the network device, where the first indication information is used by the terminal device to determine the current mode. After acquiring the first indication information, the terminal device may determine, according to the first indication information, a current mode of the resource scheduling unit.

It should be understood that the first indication information may directly indicate that the current mode is an aggregation mode or a frequency hopping mode. Optionally, the first indication information may indirectly indicate the current mode. For example, the first indication information indicates the length of the resource scheduling unit, and the terminal device may determine the current mode according to the length of the resource scheduling unit. For example, the first indication information indicates the current service type, and the terminal device according to the service type. The current mode is determined, and embodiments of the present application are not limited thereto.

It should be understood that the network device may send the first indication information to the terminal device by using multiple signaling, for example, downlink control information (DCI), radio resource control (RRC) signaling, and media access control. (media access control, MAC) layer control element (CE), etc., which is not limited in this embodiment of the present application.

Optionally, as an implementation manner of the first aspect, the communications device is a terminal device, the method further includes: receiving, by the communications device, first indication information that is sent by the network device, where the first indication information is used by the terminal device to determine the resource. a current mode of the scheduling unit; wherein the communications device determines a current mode of the resource scheduling unit, the method comprising: determining, by the communications device, the current mode according to the first indication information.

Optionally, as an implementation manner of the first aspect, the communication device is a terminal device, the method further includes: the communication device receiving the network device, sending the second indication information, where the second indication information is used to indicate that the current mode is corresponding to DMRS pattern.

It should be understood that the network device may send the second indication information to the terminal device by using various signalings, for example, DCI, RRC signaling, MAC CE, and the like, which is not limited by the embodiment of the present application.

Specifically, the network device and the terminal device need to determine the DMRS pattern when performing data transmission, and the network device notifies the terminal device by using the pattern of the DMRS used for data transmission with the terminal device, and the terminal device may determine according to the DMRS pattern. The time-frequency resource location of the DMRS, which in turn enables mapping or demapping of the DMRS.

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 of the network device.

Optionally, as an implementation manner of the first aspect, the current mode is a frequency hopping mode, where the DMRS in the preset DMRS pattern occupies consecutive N symbols in a resource scheduling unit that is not hopped, and N is greater than or An integer equal to 1; the DMRS in the DMRS pattern corresponding to the current mode occupies consecutive N ₁ symbols in the first frequency band, and consecutive N ₂ symbols in the second frequency band, and N ₁ is an integer greater than or equal to 1. N ₂ is an integer greater than or equal to 1.

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

Optionally, as an implementation manner of the first aspect, the N ₁ =N ₂ , and the position of the N1 symbols in the first frequency band is symmetric with the position of the N ₂ symbols in the second frequency band.

Therefore, in the embodiment of the present application, the symmetric setting of the DMRS in the two frequency bands enables the receiving end device to perform data demodulation in the two frequency bands in the same manner, which can reduce the complexity of the demodulation and improve the network performance.

Optionally, as an implementation manner of the first aspect, the N ₂ symbols include a first symbol in the second frequency band.

The DMRS occupies the first symbol in the second frequency band, so that the receiving end can obtain the DMRS first, and the data can be implemented. Fast demodulation.

It should be understood that the N ₂ symbol positions may also be any one of the second frequency bands, and the embodiment of the present application is not limited thereto.

For example, the N ₂ symbol positions are located in the first half of the second frequency band, or the first one of the N ₂ symbols is located in the first half of the second frequency band, for example, N ₂ = 2, and the 2 symbols may be The second and third symbols of the second frequency band, or the third and fourth symbols, the embodiment of the present application is not limited thereto.

Optionally, as an implementation manner of the first aspect, the N ₁ symbols include a first symbol in a first area of the first frequency band, where the first area is a symbol occupied by data and DMRS .

It should be understood that, in the present application, the first area includes symbols for carrying data and DMRS in the resource scheduling unit.

Setting N ₁ in the first symbol in the first region enables fast demodulation.

Optionally, as an implementation manner of the first aspect, the N ₁ =N ₂ =1, or the N ₁ =N ₂ =2.

That is to say, each segment is one symbol or two, but the embodiment of the present application is not limited thereto, and one segment occupies one symbol and the other segment occupies two symbols.

Optionally, as an implementation manner of the first aspect, the current mode is a resource hopping mode, where the DMRS in the preset DMRS pattern occupies consecutive M symbols and consecutive Ks in a resource scheduling unit that is not hopped. a symbol, wherein the M symbols are not adjacent to the K symbols; the DMRS pattern corresponding to the current mode occupies consecutive M ₁ symbols and consecutive K ₁ symbols in the symbol of the first frequency band, and a continuous M ₂ symbols and consecutive K ₂ symbols in the second frequency band, wherein the M ₁ symbols are not adjacent to the K ₁ symbols, and the M ₂ symbols are not adjacent to the K ₂ symbols , M, K, M ₁ , K ₁ , M ₂ , and K ₂ are integers greater than or equal to 1.

It should be understood that M symbols are located before K symbols, M ₁ symbols are located before K ₁ symbols, and M ₂ symbols are located before K ₂ symbols.

Optionally, as an implementation manner of the first aspect, the K ₁ symbols include a first symbol in the first frequency band, a second last symbol, or a third symbol in the last.

Setting K ₁ symbols in the second half of the first frequency band enables the receiving end to better demodulate data and improve system performance.

Optionally, an implementation of the first aspect, the symbol M ₁ in a first frequency band comprises the first symbol of the first region, the first region includes the data and the DMRS symbols occupied.

The M ₁ symbol includes the first symbol of the first region of the second frequency band, enabling fast demodulation.

Optionally, as an implementation manner of the first aspect, the M ₂ symbols include a first symbol in the second frequency band.

Optionally, as an implementation manner of the first aspect, M ₁ =M, the M ₁ symbols are the same as the positions of the M symbols, and the K ₁ symbols include a last one of the first frequency bands. a symbol, the M ₂ symbol including a first symbol in the first frequency band, K ₂ =K, the k ₂ symbol is the same as the position of the K symbols, or the K ₂ symbol positions Is the preset position.

Optionally, as an implementation manner of the first aspect, M ₁ =M, where the M ₁ symbols are the same as the positions of the M symbols,

The K ₁ symbols include a 7th symbol in the entire resource scheduling unit, and the entire resource scheduling unit includes a sum of symbols occupied by the first frequency band and the second frequency band, where the entire resource scheduling unit includes 14 symbols.

The M ₂ symbol includes an eighth symbol in the entire resource scheduling unit,

K ₂ =K, the K ₂ symbol is the same as the position of the K symbols, or the K ₂ symbol positions are preset positions.

In the embodiment of the present application, in the frequency hopping mode, by transmitting two sets of DMRSs in two frequency bands, accurate demodulation of data can be ensured when the channel state fluctuates greatly.

Optionally, as an implementation manner of the first aspect, M ₁ =M ₂ , K ₁ =K ₂ , and the M ₁ symbols in the first frequency band and the location of the K ₁ symbol and the second frequency band The position of the M ₂ symbols and the K ₂ symbols is symmetrical.

In the embodiment of the present application, the symmetric setting of the 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 the demodulation and improve the network performance.

The DMRS occupies the first symbol in the second frequency band, so that the receiving end can obtain the DMRS to be quickly demodulated and meet the fast solution. Adjust the demand.

It should be understood that the M ₂ symbol positions may also be any one of the second frequency bands, and the embodiment of the present application is not limited thereto.

For example, the M ₂ symbol positions are located in the first half of the second frequency band, or the first one of the M ₂ symbols is located in the first half of the second frequency band, for example, M ₂ = 2, and the 2 symbols may be The second and third symbols of the second frequency band, or the third and fourth symbols, the embodiment of the present application is not limited thereto.

Optionally, as an implementation manner of the first aspect, the DMRS in the preset DMRS pattern further occupies consecutive P symbols in the resource scheduling unit that is not hopped, and the P symbols and the M symbols are The K symbols are not adjacent;

The DMRS pattern corresponding to the current mode in a first frequency band occupying the further DMRS symbol P ₁ of consecutive symbols, and the second band P ₂ successive symbols, wherein the symbols and the P ₁ M ₁ th The symbol and the K ₁ symbols are not adjacent to each other, and the P ₂ symbols and the M ₂ symbols are not adjacent to the K ₂ symbols, and P, P ₁ , and P ₂ are integers greater than or equal to 1.

In the embodiment of the present application, in the frequency hopping mode, by transmitting three groups of DMRSs in two frequency bands, accurate demodulation of data can be ensured when the channel state fluctuates greatly.

It should be understood that the DMRS in the preset DMRS pattern in the embodiment of the present application may occupy L group symbols, and L may be 2, 3, 4 or greater. Similarly, in the frequency hopping mode, the current mode corresponds to the DMRS pattern. The DMRS occupies the L group symbols in each frequency band.

Optionally, as an implementation manner of the first aspect, the current mode is an aggregation mode, where the plurality of resource scheduling units are Y, and Y is an integer greater than or equal to 2;

The DMRS in the preset DMRS pattern occupies at least one consecutive symbol in each resource scheduling unit of the Y resource scheduling units,

The current pattern corresponding to the pattern occupied by the DMRS DMRS integer Y Y resource scheduling unit continuously at least one symbol before _a resource scheduling unit in each of a single resource scheduling, Y1 is greater than or equal to 1 and less than Y.

In the embodiment of the present application, in the aggregation mode, the DMRS only occupies the symbols in the first Y ₁ resource scheduling units in the Y transmissions, which reduces the resources occupied by the DMRS, avoids resource waste, and improves network performance.

Optionally, as an implementation manner of the first aspect, the current mode is an aggregation mode, where the multiple resource scheduling units are Y, and the DMRS in the preset DMRS pattern occupies each resource scheduling in the Y resource scheduling units. The L group symbol in the unit, L is an integer greater than or equal to 2, wherein the L group symbols are not adjacent, each group symbol in the L group symbol includes consecutive at least one symbol; the current mode corresponds to the DMRS pattern The DMRS occupies the L ₁ group symbol in each resource scheduling unit of the Y resource scheduling units, and L ₁ is an integer smaller than L, wherein the L ₁ group symbols are not adjacent, and each group symbol in the L ₁ group symbol Includes at least one symbol in succession.

In the embodiment of the present application, in the aggregation mode, the DMRS only occupies the L ₁ group symbol in each resource scheduling unit of the Y resource scheduling units that are aggregated and transmitted, reduces the resources occupied by the DMRS, avoids resource waste, and improves the network. performance.

Optionally, as an implementation manner of the first aspect, the current mode is an aggregation mode, where the multiple resource scheduling units are Y, and the DMRS in the preset DMRS pattern occupies each resource scheduling in the Y resource scheduling units. The L group symbol in the unit, the DMRS in the DMRS pattern corresponding to the current mode occupies the L group symbol in each resource scheduling unit of the Y resource scheduling units, where L is an integer greater than or equal to 2, wherein the L group symbol Each of the L sets of symbols includes at least one consecutive symbol, and the maximum difference between the intervals of any two adjacent sets of Y*L group symbols occupied by the DMRS in the preset DMRS pattern is not adjacent. For R symbols, the maximum difference between the spacings of any two adjacent symbols in the Y*L group symbols occupied by the DMRS in the DMRS pattern corresponding to the current mode is S symbols, S<R.

Therefore, in the embodiment of the present application, in the aggregation mode, the symbol distribution in the Y resource scheduling units of the aggregated transmission occupied by the DMRS is relatively uniform, which can improve the demodulation performance, avoid resource waste, and improve network performance.

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

In a second aspect, a method for transmitting a DMRS is provided, the method comprising: the communication device determining, by using indication information of an additional DMRS, a DMRS pattern corresponding to a frequency hopping pattern, the additional DMRS indicating a DMRS located after the pre-load DMRS, The indication information is used to indicate at least one of whether the additional DMRS, the number of the additional DMRS, and the location of the additional DMRS are present, the frequency hopping mode indicating that a part of symbols in a resource scheduling unit are located One frequency band, another part of the symbol is located in the second frequency band, and the communication device performs mapping or demapping of the DMRS using the DMRS pattern.

It should be noted that if only the first half of the NR has DMRS, after the frequency hopping, there is no pilot in the second half, and the data cannot be solved normally. If you consider frequency hopping, designing DMRS for it separately will increase the complexity of DMRS design and increase the complexity of system implementation.

The embodiment 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 implementation complexity and improve system performance.

Optionally, as an implementation manner, 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 the first frequency band, and a segment of the second frequency band A symbol in which a segment of symbols includes at least one symbol in succession.

Optionally, as an implementation manner, a segment of the first frequency band includes a first symbol in a first region of the first frequency band, where the first region includes a symbol occupied by the data and the DMRS.

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

Optionally, as an implementation manner, when the indication information is used to indicate that the additional DMRS exists, the DMRS in the DMRS pattern occupies the number of segments and positions in the first frequency band, and the occupied second frequency band The number of symbols and the position in the same are the same as the number of segments and the position indicated by the indication information and the pre-DMRS indication information.

For example, the DMRS occupies the same number of symbols and the location in the first frequency band and the DMRS segment number and location indicated by the pre-load DMRS indication information, and the DMRS occupies the same number of symbols and the location in the first frequency band and the DMRS segment number and location indicated by the additional DMRS indication information.

Optionally, as an implementation manner, when the indication information is used to indicate that the additional DMRS exists,

The DMRS in the DMRS pattern occupies two consecutive symbols in the first frequency band, and two consecutive symbols in the second frequency band, or the DMRS in the DMRS pattern occupies the first frequency band. a continuous two-segment symbol, and a segment of the second frequency band, or the DMRS in the DMRS pattern occupies a segment of the first frequency band and two non-contiguous symbols in the second frequency band, where Each of the two segments of symbols includes a continuous indicator indicating a symbol, and the segment of the symbol includes at least one symbol in succession.

Optionally, as an implementation manner, when the DMRS in the DMRS pattern occupies two consecutive symbols in the first frequency band, the next one of the two symbols in the first frequency band includes the first frequency band. The last symbol in the second frequency band; or, in the DMRS pattern, the DMRS occupies two consecutive symbols in the second frequency band, the previous one of the two frequency symbols in the second frequency band includes the second frequency band The first symbol.

In a third aspect, a communication device is provided for performing the method of any of the first aspect, the second aspect, the first aspect, and the second aspect. In particular, the network device comprises means for performing the above method.

In a fourth aspect, a communication device is provided, the communication device comprising a processor and a memory, the memory for storing a computer program for executing a computer program stored in the memory, performing the first aspect, the second aspect The method of any of the possible implementations of the first aspect and the second aspect.

A fifth aspect provides a computer readable medium having stored thereon a computer program, the computer program being executed by a computer to implement any of the first aspect, the second aspect, the first aspect, and the second aspect The method in .

In a sixth aspect, a computer program product is provided, the computer program product being implemented by a computer to implement the method of any of the first aspect, the second aspect, the first aspect, and the second aspect.

In a seventh aspect, a processing apparatus is provided, including a processor and an interface;

The processor is configured to perform the method in any of the first aspect, the second aspect, the first aspect, and the second aspect.

It should be understood that the processing device in the foregoing seventh aspect may be a chip, and the processor may be implemented by using hardware or by software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; When implemented by software, the processor can be a general purpose processor, which is implemented by reading software code stored in the memory. The memory can be integrated in the processor and can exist independently of the processor.

DRAWINGS

FIG. 1 is a schematic block diagram of a communication system to which an embodiment of the present application is applicable. .

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

FIG. 3 is a schematic flow chart of a method for transmitting a DMRS according to another embodiment of the present application.

FIG. 4 is a schematic flow chart of a method for transmitting a DMRS according to another embodiment of the present application.

FIG. 5 is a schematic diagram of a preset DMRS pattern according to an embodiment of the present application.

FIG. 6 is a schematic diagram of a preset DMRS pattern according to another embodiment of the present application.

7 is a schematic diagram of a DMRS pattern in accordance with an embodiment of the present application.

Figure 8 is a schematic illustration of a DMRS pattern in the prior art.

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

FIG. 10 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

Figure 11 is a schematic illustration of another DMRS pattern in the prior art.

FIG. 12 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

FIG. 13 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

FIG. 14 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

Figure 15 is a schematic illustration of another DMRS pattern in the prior art.

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

17 is a schematic diagram of another DMRS pattern in the prior art.

FIG. 18 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

19 is a schematic block diagram of a communication device in accordance with one embodiment of the present application.

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

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

FIG. 22 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

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

FIG. 24 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

FIG. 25 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

FIG. 26 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

FIG. 27 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

28 is a schematic diagram of a DMRS pattern in accordance with another embodiment of the present application.

29 is a schematic diagram of a DMRS pattern in accordance with another embodiment of the present application.

FIG. 30 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

FIG. 31 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

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

FIG. 33 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

FIG. 34 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

FIG. 35 is a schematic diagram of a DMRS pattern according to another embodiment of the present application.

FIG. 36 is a schematic diagram of DMRS multiplexing according to an embodiment of the present application.

FIG. 37 is a schematic diagram of DMRS multiplexing according to another embodiment of the present application.

Detailed ways

The technical solutions in the present application will be described below with reference to the accompanying drawings.

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

In the embodiment of the present application, the network device may be a global system of mobile communication (GSM) or a base transceiver station (BTS) in code division multiple access (CDMA), or may be a broadband A base station (nodeB, NB) in a code division multiple access (WCDMA), or an evolved base station (eNB/eNodeB) in long term evolution (LTE), or a relay station or an 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 unit in an NR system, such as a remote radio unit One or a group of base stations (including multiple antenna panels) in a 5G system, etc. Different network devices may be located in the same cell or in different cells, and are not limited herein.

In the embodiment of the present application, the terminal device may also be referred to as a user equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, and a terminal. , a wireless communication device, a user agent, or a 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), with wireless communication. Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, drone devices, and terminal devices in future 5G networks.

1 is a schematic diagram of a communication system using the method of transmitting data of the present invention. The communication system can be any of the above communication systems. As shown in FIG. 1, the communication system 100 includes a network side device 102, and the network side device 102 may include a plurality of 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. Two antennas are shown in Figure 1 for each antenna group, although more or fewer antennas may be used for each group. Network side device 102 may additionally include a transmitter chain and a receiver chain, as will be understood by those of ordinary skill in the art, which may include various components associated with signal transmission and reception (eg, processors, modulators, multiplexers, Demodulator, demultiplexer or antenna, etc.).

The network side device 102 can communicate with a plurality of terminal devices (e.g., the terminal device 116 and the terminal device 122). However, it will be appreciated that the network side device 102 can communicate with any number of terminal devices similar to the

terminal device

116 or 122.

Terminal devices

116 and 122 may be, for example, cellular telephones, smart phones, portable computers, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable for communicating over wireless communication system 100. device.

As shown in FIG. 1, terminal device 116 is in communication with

antennas

112 and 114, wherein

antennas

112 and 114 transmit information to terminal device 116 over forward link 118 and receive information from terminal device 116 over reverse link 120. In addition, terminal device 122 is in communication with

antennas

104 and 106, wherein

antennas

104 and 106 transmit information to terminal device 122 over forward link 124 and receive information from terminal device 122 over reverse link 126.

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

As another example, in a time division duplex (TDD) system and a full duplex system, the forward link 118 and the reverse link 120 can use a common frequency band, a forward link 124, and a reverse link. Link 126 can use a common frequency band.

Each set of antennas and/or areas designed for communication is referred to as a sector of the network side device 102. For example, the antenna group can be designed to communicate with terminal devices in sectors of the network side device 102 coverage area. In the process in which the network side device 102 communicates with the

terminal devices

116 and 122 through the

forward links

118 and 124, respectively, the transmit antenna of the network side device 102 can utilize beamforming to improve the signal to noise ratio of the

forward links

118 and 124. . In addition, when the network side device 102 uses beamforming to transmit signals to the randomly dispersed

terminal devices

116 and 122 in the relevant coverage area, the neighboring cell is compared with the manner in which the network side device transmits a signal to all of its terminal devices through a single antenna. Mobile devices in the middle are subject to less interference.

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 transmitting data, the wireless communication transmitting device can encode the data for transmission. In particular, the wireless communication transmitting device may acquire (eg, generate, receive from other communication devices, or store in memory, etc.) a certain number of data bits to be transmitted over the channel to the wireless communication receiving device. Such data bits may be included in a transport block (or multiple transport blocks) of data that may be segmented to produce multiple code blocks.

In order to make the embodiments of the present invention easier to understand, the following is a description of the transmission process of the DMRS involved in the implementation of the present invention, and the description should not be construed as limiting the scope of the present invention.

Specifically, the sending end device (for example, the downlink transmission is a network device, and the uplink transmission is a terminal device) sends the pre-coded DMRS and data according to the DMRS pattern, so that after receiving the information sent by the sending end device, the receiving end device may The DMRS pattern acquires the DMRS and demodulates the data according to the DMRS to acquire data.

In practical applications, both the transmitting device and the receiving device need to know the symbol position occupied by the 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. Communicate. Specifically, the transmitting device maps the DMRS according to the DMRS pattern, and the receiving device demaps the DMRS according to the DMRS pattern.

The embodiments of the present application mainly relate to mapping or demapping of a DMRS according to a DMRS pattern by a communication device (a network device or a terminal device). The method for transmitting DMRS in the embodiment of the present application is described in detail below with reference to the accompanying drawings.

FIG. 2 shows a schematic flow chart of a method for transmitting a DMRS according to an embodiment of the present application. The method 200 shown in Figure 2 can be applied to any of the communication systems described above. The method shown in FIG. 2 may be performed by a communication device, which may be a network device or a terminal device, and the network device may be any one of the network devices described above, and the terminal device may be any of the above described The terminal device, the embodiment of the present application is not limited thereto. Specifically, the method 200 shown in FIG. 2 includes:

210. The communications device determines a current mode of the resource scheduling unit, where the current mode includes a frequency hopping mode or an aggregation mode, where the hopping mode indicates that a part of symbols in one resource scheduling unit is in the first frequency band, and another part of the symbol is in the second frequency band. The pattern indicates that multiple resource scheduling units aggregate transmissions.

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

220. The communication device performs mapping or demapping of the DMRS by using the DMRS pattern corresponding to the current mode, where 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.

It should be understood that, in the embodiment of the present application, the DMRS pattern can represent the symbol position occupied by the DMRS, and the DMRS pattern can also be referred to as a DMRS location, a DMRS attribute, or data distribution information, and the embodiment of the present application is not limited thereto.

In the embodiment of the present application, the pattern of the DMRS in the current mode 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 the embodiment of the present application can meet the requirements of different modes. Improve network performance.

A specific example of a method for transmitting a DMRS according to an embodiment of the present application is described below with reference to FIG. 3 and FIG. 4, respectively.

FIG. 3 illustrates a method for transmitting a DMRS according to an embodiment of the present application, and FIG. 3 illustrates a method for transmitting a DMRS in a downlink transmission according to an embodiment of the present application. Specifically, as shown in FIG. 3, the method 300 includes:

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

In particular, the network device can determine the current mode in a variety of ways.

Optionally, in an implementation manner, the network device may determine the current mode according to the channel state information reported by the terminal device and the network state of the cell.

Optionally, in another implementation, the network device may determine the current mode according to the type of the service. The service type may include a service that needs to be quickly demodulated or a service that requires high transmission performance.

Optionally, in another implementation manner, 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. The device indicates the current mode of 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.

320. The network device performs mapping of the DMRS according to the DMRS pattern corresponding to the current mode.

Specifically, the network device maps the DMRS and the data according to the DMRS pattern, and transmits the mapped DMRS and the data.

In an implementation manner, 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, and the network device and the terminal device determine the current After the mode, the DMRS pattern corresponding to the current mode can be determined according to the preset correspondence.

In another implementation manner, the network device may determine a corresponding DMRS pattern according to the current mode, and indicate, by using the second indication information, the DMRS pattern corresponding to the current mode of the terminal device. For example, the network device can flexibly determine the DMRS pattern corresponding to the current mode according to the channel state or the service requirement corresponding to the current mode, and the embodiment of the present application is not limited thereto.

330. The terminal device performs demapping of the DMRS according to the DMRS pattern corresponding to the current mode.

After receiving the data sent by the network device, the terminal device may perform demapping of the DMRS according to the DMRS pattern corresponding to the current mode, and demodulate the data according to the DMRS.

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

In an implementation manner, 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, and determine the resource scheduling unit mode in the terminal device. In the case of the preset, the DMRS pattern corresponding to the current mode can be determined according to the preset correspondence. Specifically, the terminal device can determine the current mode according to various manners.

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

FIG. 4 illustrates a method for transmitting a DMRS according to an embodiment of the present application, and FIG. 4 illustrates a method for transmitting a DMRS in an uplink transmission according to an embodiment of the present application. Specifically, as shown in FIG. 4, the method 400 includes:

410. The terminal device determines a current mode of the resource scheduling unit.

It should be understood that step 410 is similar to the manner in which the terminal device determines the current mode in step 330 in FIG. 3. To avoid repetition, the detailed description is omitted as appropriate herein.

420. The terminal device performs mapping of the DMRS according to the DMRS pattern corresponding to the current mode.

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

Specifically, the method for the terminal device to determine the pattern of the DMRS corresponding to the current mode in step 420 corresponds to the method for the terminal device to determine the DMRS pattern corresponding to the current mode in step 330 in FIG. 3, and to avoid repetition, the detailed description is omitted here.

430. The network device performs demapping of the DMRS according to the DMRS pattern corresponding to the current mode.

After receiving the data sent by the terminal device, the network device may perform demapping of the DMRS according to the DMRS pattern corresponding to the current mode, and demodulate the data according to the DMRS.

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

It should be understood that the method for determining, by the network device, the pattern corresponding to the current mode in step 430 corresponds to the method for determining the pattern corresponding to the current mode by the network device in step 320 in FIG. 3, and to avoid repetition, the detailed description is omitted here.

The specific form of transmitting the DMRS in the uplink and downlink transmission in the embodiment of the present application is described in the following. 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.

Specifically, the preset DMRS pattern can be divided into a plurality of cases, which will be described in detail below.

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

Case 2: The preset pattern is an additional pattern. As shown in FIG. 6 , taking a resource scheduling unit occupying 14 symbols as an example, DRMS occupies L group symbols, and L is an integer greater than or equal to 2, where The L sets of symbols are not adjacent, and each set of the L sets of symbols includes consecutive at least one symbol; in FIG. 6 , L=2 is taken as an example, that is, the DMRS occupies consecutive M symbols in a resource scheduling unit and is continuous. K symbols, wherein the M symbols are not adjacent to the K symbols, and M and K are integers greater than or equal to 1. The case where M=1 and K=1 is shown in FIG. 6, but the embodiment of the present invention is not limited thereto, and for example, M and K may be equal to 2 or 3, and the like. Optionally, in the embodiment of the present application, the DMRS is not limited to the case where the DMRS occupies two sets of symbols, and the L may also be equal to 3, that is, the DMRS also occupies consecutive P symbols in the resource scheduling unit that is not hopped, optionally , L can also be equal to 4, 5, and so on.

It should be understood that in the foregoing case 1, the DMRS occupies only one set of symbols, and in the second case, the DMRS occupies at least two sets of symbols, and the first and second cases may correspond to different application scenarios. Case 2 may correspond to a scenario in which channel state fluctuations are relatively large, for example, a scenario in which a terminal device moves rapidly, and in case 2, accurate demodulation of data is realized by transmitting multiple sets of DMRS. Case 1 can correspond to a scenario where the channel state is relatively stable. Therefore, accurate demodulation of data can be achieved by transmitting a set of DMRSs.

The DMRS patterns corresponding to the current mode of the embodiment of the present application are respectively described in detail in the following two cases for the current mode, namely, the frequency hopping mode and the aggregation mode.

First, the pattern of the embodiment of the present application corresponding to the above case 1 and case 2 when the current mode is the frequency hopping mode is described.

Specifically, when the current mode is the frequency hopping mode, in the foregoing embodiment, in the embodiment of the present application, as shown in FIG. 7 , the DMRS in the DMRS pattern corresponding to the current mode occupies consecutive N ₁ symbols in the first frequency band. And N ₂ symbols consecutive in the second frequency band, N ₁ is an integer greater than or equal to 1, and N ₂ is an integer greater than or equal to 1. Fig. 7 shows the case where N ₁ =1 and N ₂ =1.

FIG. 8 shows that in the existing mode, in the frequency hopping mode, the DMRS is still transmitted according to the position in the preset pattern shown in FIG. 5. As can be seen from FIG. 8, the DMRS is transmitted in the first frequency band, and There is no DMRS transmitted in the second frequency band. However, in practical applications, the channel state corresponding to the second frequency band is often different from the channel state corresponding to the first frequency band. Therefore, only the DMRS transmitted in the first frequency band is used to demodulate data. It will affect the accuracy of data demodulation in the second band and affect network performance.

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

It should be understood that the N2 symbol positions may be any one of the second frequency bands, and the embodiment of the present application is not limited thereto.

Optionally, as an embodiment, N ₁ =N ₂ , and the position of the N1 symbols in the first frequency band and the position in the first frequency band is symmetric with the position of the N2 symbols in the second frequency band. For example, as shown in FIG. 9, N ₁ = N ₂ =1, and N ₁ and N ₂ are the third symbol positions in the first frequency band and the second frequency band.

Alternatively, as another embodiment, N ₁ =N ₂ =1 or 2.

Optionally, the N ₁ symbols include a first symbol in a first region of the first frequency band, where the first region includes data and a symbol occupied by the DMRS.

Optionally, the N ₂ symbols comprise a first symbol in the second frequency band.

Optionally, as another embodiment, the N ₂ symbols include a first symbol in the second frequency band. For example, as shown in FIG. 7, N ₂ =1, and the DMRS occupies the first symbol in the second frequency band. It should be understood that only the case of N ₂ =1 is shown in FIG. 7 , but the embodiment of the present application is not limited thereto, and when the DMRS occupies multiple symbol positions in the second frequency band, the multiple symbols are from the second The first symbol in the band is arranged consecutively. For example, when N ₂ = 2, the DMRS occupies the first match and the second match in the second band.

When the current mode is the frequency hopping mode, in the case of the additional pattern of the foregoing case 2, in the embodiment of the present application, as shown in FIG. 10, the DMRS pattern corresponding to the current mode occupies consecutive symbols in the symbol of the first frequency band. M ₁ symbols and consecutive K ₁ symbols, and consecutive M ₂ symbols and consecutive K ₂ symbols in the second frequency band, wherein the M ₁ symbols are not adjacent to the K ₁ symbols, M ₂ symbols are not adjacent to the K ₂ symbols, and M ₁ , K ₁ , M ₂ , and K ₂ are integers greater than or equal to 1. FIG. 10 shows a case where M ₁ , K ₁ , M ₂ , and K ₂ are both equal to 1.

Optionally, as described above, before the frequency hopping, if there are two DMRSs, after the frequency hopping, the front and rear frequency bands each have two segments. However, the embodiment of the present application is not limited thereto. For example, before the frequency hopping, as long as the DMRS is more than one segment, after the frequency hopping, it may be any one of the three types 2 below. For details, refer to the description of Type 2 below.

FIG. 11 shows that in the prior art, in the frequency hopping mode, the DMRS is still transmitted according to the position in the preset pattern shown in FIG. 6. As can be seen from FIG. 11, in the first frequency band and the second frequency band. A set of DMRSs is transmitted. However, in the scenario of the second case, since the channel state fluctuates greatly, it is difficult to ensure accurate demodulation of data by transmitting only one set of DMRSs in one frequency band.

In the embodiment of the present application, in the frequency hopping mode, by transmitting multiple groups (L groups) of DMRSs in both frequency bands, accurate data demodulation can be ensured when the channel state fluctuates greatly.

It should be understood that, among the two sets of symbols occupied by the DMRS in the preset additional pattern described in FIG. 6, 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 thereto. For example, the additional pattern in FIG. 6 may evolve into two groups of symbols that may be located in the first half of the resource scheduling unit. For example, the DMRS occupies the third and sixth in the preset additional pattern. Symbols. Then in this case, the pattern in the frequency hopping mode in the existing mode shown in FIG. 11 can be evolved to transmit two sets of DMRS in the first frequency band, for example, the third and sixth in the first frequency band. The symbol transmits DMRS, and the DMRS is not transmitted in the second frequency band. In this case, since the second frequency band does not transmit DMRS, it will affect the accuracy of data demodulation in the second frequency band and affect network performance.

It should be understood that the symbol positions of the DMRS in the first frequency band and the second frequency band are not limited in the embodiment of the present application. As long as the L-group DMRS is included in each frequency band, the embodiment of the present application does not limit this.

Optionally, as another embodiment, M ₁ =M ₂ , K ₁ =K ₂ , and the M ₁ symbols and the position of the K1 symbols in the first frequency band and the M2 symbols in the second frequency band And the position of the K2 symbols is symmetrical. For example, as shown in FIG. 12, M ₁ = M ₂ =1, K ₁ = K ₂ =1, and the DMRSs occupy the third and sixth symbol positions in the first frequency band and the second frequency band.

Optionally, as another embodiment, the M ₂ symbols include a first symbol in the second frequency band. For example, as shown in FIG. 10, M ₂ =1, and M ₂ corresponds to the first symbol in the second frequency band. It should be understood that only the case of M ₂ =1 is shown in FIG. 10, but the embodiment of the present application is not limited thereto, and when the DMRS occupies multiple symbol positions in the second frequency band, the multiple symbols are from the second The first symbol in the band is arranged consecutively. For example, when M ₂ = 2, the DMRS occupies the first match and the second match in the second band.

Alternatively, as another embodiment, M1=M2=1 or 2, and K1=K2=1 or 2.

Optionally, the K ₁ symbols include a last symbol in the first frequency band, a second last symbol, or a third symbol from the last.

Alternatively, in another embodiment, the symbol M ₁ comprises a first symbol in a first frequency band of said first region, said first region includes the data and the DMRS symbols occupied.

Optionally, as another embodiment, the M ₂ symbols include a first symbol in the second frequency band.

Optionally, as another embodiment, M ₁ =M, the M ₁ symbols are the same as the positions of the M symbols, and the K ₁ symbols include a last symbol in the first frequency band. The M ₂ symbol includes a first symbol in the first frequency band, K ₂ =K, the k ₂ symbol is the same as the position of the K symbols, or the K ₂ symbol positions are preset positions. .

Optionally, as another embodiment, M ₁ =M, the M ₁ symbols are the same as the positions of the M symbols, and the K ₁ symbols include the 7th symbol in the entire resource scheduling unit. The entire resource scheduling unit includes a sum of symbols occupied by the first frequency band and the second frequency band, the entire resource scheduling unit includes 14 symbols, and the M ₂ symbol includes an eighth symbol in the entire resource scheduling unit, K ₂ = K, the K ₂ symbol is the same as the position of the K symbols, or the K ₂ symbol positions are preset positions.

It should be understood that, in the foregoing case 2, only the case of L=2 in one resource scheduling unit is described, that is, the example in which the DMRS occupies two sets of symbols, but the embodiment of the present application is not limited thereto, and L may be used in practical applications. Equivalent to 3, 4, etc., that is, the DMRS in the DMRS pattern can be used for 3 groups, 4 groups or more groups of DMRSs. For example, as shown in FIG. 13, a preset resource scheduling unit includes three groups of DMRSs, that is, the preset. In the DMRS pattern, the DMRS occupies consecutive M symbols, consecutive K symbols, and consecutive P symbols in a resource scheduling unit that is not frequency hopping, and the P symbols, the M symbols, and the K symbols are not in phase. Neighbor; then the DMRS pattern corresponding to the current mode also occupies consecutive M ₁ symbols, consecutive K ₁ symbols and consecutive P ₁ symbols in the symbols of the first frequency band, and consecutive M ₂ in the second frequency band a symbol, a continuous K ₂ symbols, and a continuous P ₂ symbols; wherein the P ₁ symbols are not adjacent to the M ₁ symbols and the K ₁ symbols, and the P ₂ symbols and the M ₂ symbols The symbol is not adjacent to the K ₂ symbols, M, K, P, M ₁ , K ₁ , P ₁ , M ₂ , K ₂ And P ₂ is an integer greater than or equal to 1. For the sake of brevity, only the case where M, K, P, M ₁ , K ₁ , P ₁ , M ₂ , K ₂ , and P ₂ are equal to 1 is shown in FIG. 13 , but the embodiment of the present application is not limited thereto.

It should be understood that the case where L is equal to 4 or other values may be similar to the case where L is equal to 2 or 3, and in order to avoid repetition, it will not be repeated here.

The above describes the situation of the DMRS corresponding to the current mode of the embodiment of the present application in the first case and the second case when the current mode is the frequency hopping mode.

It should be understood that consecutive symbols occupied by the DMRS in the embodiment of the present application may also be referred to as a group of DMRS symbols, or a DMRS symbol, where the number (or number) of DMRSs herein indicates the number of symbols occupied by the DMRS. Or the number of segments of the symbol, not the number of symbols. In other words, in the embodiment of the present application, the DMRS may be multiple groups or multiple segments, where the two DMRSs are discontinuous in time, that is, at least one symbol is separated between the segment DMRSs. A set of DMRSs or a DMRS indicates that at least one consecutive symbol (eg, one, two, or three) is occupied in the time domain. FIG. 20 shows four typical types in the frequency hopping mode in the embodiment of the present application, namely, Type 1 and Type 3, and Type 3 includes Type 2-I, Type 2-II, and Type 2-III.

FIG. 20 shows four typical types in the frequency hopping mode in the embodiment of the present application, namely, Type 1 and Type 3, and Type 3 includes Type 2-I, Type 2-II, and Similar to 2-III.

Type 1 is only one segment of DMRS in each frequency band after frequency hopping. Type 2-I has two DMRSs in each frequency band after frequency hopping. Type 2-II is two in the first frequency band after frequency hopping. Segment DMRS, there is a DMRS in the second frequency band, Type 2-III has a DMRS in the first frequency band after frequency hopping, and two DMRS in the second frequency band.

It should be understood that, in the embodiment of the present application, only the case where each DMRS occupies one symbol is shown in FIG. 20, but the embodiment of the present application is not limited thereto, and a DMRS may occupy at least one consecutive symbol, for example, a segment. The DMRS occupies one symbol or occupies two consecutive symbols.

It should be understood that, in the embodiment of the present application, the case where the two frequency bands are equally divided into 14 symbols after the frequency hopping is shown, that is, there are 7 symbols in each frequency band, but the embodiment of the present application is not limited thereto, and two The number of symbols in the frequency band 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, the second frequency band includes 5 symbols, and so on.

It should be understood that only four types of DMRS patterns in the embodiment of the present application are shown in FIG. 20, but the positions of the DMRSs in each pattern type and the relationship between the DMRSs are not described, and the following are respectively for each type. The location of its DMRS is described in detail.

It should be understood that, in the embodiment of the present application, the DMRS is located in a certain symbol, which may indicate that the DMRS occupies the symbol, and may also indicate that the DMRS is fixed to the symbol. The embodiment of the present application is not limited thereto.

For the first frequency band, there is only one DMRS. The position of the DMRS can follow the four principles corresponding to Figure 21-24 below.

It should be understood that the one-segment DMRS may occupy one symbol or two consecutive symbols. For the convenience of description, the embodiment of the present application only cites an example in which the one-segment DMRS occupies one symbol, but the present application implements The example is not limited to this.

It should also be understood that for ease of illustration in Figures 21-24, 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 shown.

The first principle: As shown in FIG. 21, the position of the 1-segment DMRS is located in the middle of all OFDM symbols in the first frequency band as shown in FIG. 21, and N represents the number of all OFDM symbols in the first frequency band.

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

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

It should be understood that the first area in a certain frequency band in this application is the symbol occupied by the data and the DMRS in the frequency band. To avoid repetition, the details are not described below.

The third principle: as shown in FIG. 23, the position of the 1-stage DMRS adopts a position indicated by the indication information of the front loaded DMRS, wherein the indication information indicates that the first DMRS is located when the frequency hopping is not hopped. position.

As shown in FIG. 23, the indication information indicates that the front loaded is in the fourth symbol (the DMRS occupies the fourth symbol when the frequency hopping is not hopped), and then the DMRS in the first frequency band after the frequency hopping also occupies the fourth symbol.

The fourth principle: as shown in FIG. 24, the position of the 1-segment DMRS is located at the Mth symbol starting from the first region. In practical applications, M can be 1. However, embodiments of the present application are not limited thereto, for example, M=2, 3, 4, or 5, and the like.

For the second frequency band, there is only one DMRS, and the position of the one-segment DMRS may follow the following seven principles.

It should also be understood that in Figures 25-29, for ease of illustration, only the location of the DMRS in the second frequency band is shown, and the location of the DMRS in the first frequency band is not drawn.

First principle: As shown in FIG. 25, the position of the 1-segment DMRS is located in the middle of all OFDM symbols in the second frequency band, as shown in FIG. 25, where N represents the number of all OFDM symbols in the first frequency band.

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

The second principle: as shown in FIG. 26, the position of the 1-segment DMRS is located in the middle symbol of the first region in the second frequency band, as shown in FIG. 26, and N represents the number of symbols occupied by the first region.

The third principle: As shown in FIG. 27, the position of the 1-segment DMRS is located at the Mth symbol starting from the first region. In practical applications, M can be 1. However, embodiments of the present application are not limited thereto, for example, M=2, 3, 4, or 5, and the like.

The fourth principle: As shown in Figures 28 and 29, the position of a segment of the DMRS in the second band is symmetric or corresponding to the position of the first segment of the DMRS in the first band.

Wherein, FIG. 28 shows that the position of one segment of the DMRS in the second frequency band in all symbols of the second frequency band is symmetric with the position of the first DMRS in the first frequency band in all symbols of the first frequency band. 29 shows that the position of a segment of the DMRS in the second frequency band in the first region symbol of the second frequency band is symmetric with the position of the first DMRS in the first frequency band in all first region symbols of the first frequency band. .

As shown in FIG. 28, the symmetry here may be overall symmetry. For example, the number of symbols in the first frequency band is equal to the number of symbols in the second frequency band. The DMRS in the first frequency band occupies the symbol position, and is symmetric with the DMRS occupied symbol position in the second frequency band, for example, Both are intermediate positions, and the first drawing in Fig. 28 shows the case where the intermediate position is occupied. Optionally, as shown in FIG. 28, the symmetry here may be post-symmetry. Specifically, the DMRS in the first frequency band occupies the Xth symbol position of the last frequency, and then the DMRS in the second frequency band also occupies the inverse Xth symbol position. The middle drawing in 28 shows the case of X=3; alternatively, as shown in FIG. 28, the symmetry here may be the front symmetry, specifically, the DMRS in the first frequency band occupies a positive Xth symbol. Position, then the DMRS in the second band also occupies the positive X-symbol position in the third figure in Figure 28, showing the case of X=4.

As shown in FIG. 29, the symmetry here may be post-symmetry. Specifically, the DMRS in the first frequency band occupies the inverse Xth symbol position, and then the DMRS in the second frequency band also occupies the inverse Xth symbol position, in the middle of FIG. The figure shows the case of X=4, and the third figure shows the case of X=4; alternatively, as shown in Fig. 29, the symmetry here may be the front symmetry, specifically, the first frequency band The middle DMRS occupies a positive Xth symbol position, then the DMRS in the second frequency band also occupies a positive Xth symbol position, and the first figure in Fig. 29 shows the case of X=1.

The fifth principle: As shown in FIG. 30, the location of the 1-segment DMRS is indicated by the indication information of the additional DMRS, wherein the indication information indicates the location where the additional DMRS is located when the frequency hopping is not hopped. It should be noted that if there are multiple segments of the DMRS, the location of the 1-segment DMRS is the same as the N-th segment indicated by the indication information, for example, the same as the first segment. In this way, the position of the DMRS can be one of {7, 8, 10, 12, 13}.

In the sixth principle, the location of the one-segment DMRS is selected from a specific number of symbols. For example, if the 1-segment DMRS includes one symbol, the one-segment DMRS can occupy the first symbol in the second frequency band. The 3 symbols or the 5th symbol, or the 1 segment DMRS may occupy the 8th symbol, the 10th symbol, or the 12th symbol in the entire scheduling unit.

Optionally, the location of the 1-segment DMRS may also be bound to (or have a corresponding relationship with) a frame structure or a symbol position (or a first region location) of the PUSCH, and a frame structure or a PUSCH symbol position may correspond to one type. The position of the application is not limited to this.

The symbol position occupied by the one-end DMRS can be configured by signaling, and the embodiment of the present application is not limited thereto.

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

It should be understood that the above description describes the locations of a DMRS having a segment in both the first frequency band and the second frequency band. In an actual application, the location of the DMRS in the type 1 may be any combination of the foregoing, and the embodiment of the present application is not limited thereto. That is to say, after the type 1 is determined, 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.

Optionally, in an actual application, the location of the DMRS in the type 1 may be configured by the network device to the terminal device by using a signaling, for example, may be configured by using RRC, DCI, or MAC CE signaling, and the embodiment of the present application is not limited thereto.

For the first frequency band, there are two DMRSs (corresponding to types 2-I and 2-II), and the positions of the two DMRSs may follow the following seven principles.

It should be understood that each DMRS in the two DMRSs may occupy one symbol or two consecutive symbols. For the convenience of description, the embodiment of the present application only cites an example in which each DMRS occupies one symbol, but The embodiments of the present application are not limited thereto.

It should also be understood that for ease of illustration in Figures 31-34, 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 shown.

The first principle: as shown in FIG. 31, the first segment of the 2-segment DMRS is fixed in the entire first frequency band, the first N1 OFDM symbols, and the second segment is fixed in the entire first frequency band from the last number. N2 OFDM symbols.

The second principle is as shown in FIG. 32, the first segment of the 2-segment DMRS, the first region symbol fixed in the first frequency band is the N1th OFDM symbol from the top, and the second segment is fixed in the first frequency band. The first region symbol is from the last N2th OFDM symbol.

The third principle: as shown in FIG. 33, the first segment of the two-stage DMRS adopts a position indicated by the indication information of the front loaded DMRS, wherein the indication information indicates the first segment when the frequency hopping is not performed. The location of the DMRS. The second segment is fixed in the first frequency band by the first region symbol from the last N2 OFDM symbols, for example, N2=1 or 2, 3, and the like.

It should be understood that the pre-load DMRS in this application refers to the first segment of the 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 load DMRS. The additional DMRS is equivalent to the attached DMRS, and refers to the other segment of the DMRS after the pre-load DMRS.

The fourth principle: as shown in FIG. 34, the first segment of the two-stage DMRS adopts the position indicated by the indication information of the front loaded DMRS; the second segment adopts the position indicated by the additional DMRS indication information in the frequency band, wherein When the additional DMRS indication information indicates a plurality of locations within the frequency band, the second segment location is the last one of the plurality of locations.

The fifth principle: the first segment of the two-stage DMRS is located in the middle of the first region or the first region in the first frequency band; the second region is fixed in the first frequency band, and the first region symbol is from the last N2 OFDM symbols.

The sixth principle: the first segment of the 2-segment DMRS is the same as the first segment when not hopping; the second segment is fixed to the first, second or third symbol in the first frequency band. Specifically, the second DMRS position may be bound or corresponding to the frame structure, and the embodiment of the present application is not limited thereto.

The seventh principle: the first segment of the 2-segment DMRS is fixed to the entire scheduling resource, the first N1 OFDM symbol; the second segment is the Nth symbol after the first segment, N=1/2/3 /4.

For the second frequency band, there are two DMRSs (corresponding to types 2-I and 2-III), and the positions of the two DMRSs may follow the following eight principles.

The first principle: the first segment of the 2-segment DMRS is fixed in the entire second frequency band, the N1th OFDM symbol from the top, and the second segment is fixed in the N2th OFDM symbol from the last in the second frequency band.

The second principle: the first segment of the 2-segment DMRS, the first region symbol fixed in the second frequency band is the N1th OFDM symbol from the top, and the second region is fixed in the second region. Number N2 OFDM symbols.

The third principle: as shown in FIG. 35, the second segment of the two-stage DMRS uses the indication indicated by the indication information of the additional DMRS, wherein the indication information indicates the DMRS position of the frequency band when the frequency hopping is not performed, where When the indication information indicates a plurality of DMRS locations, the second segment location is a location where the last segment of the DMRS indicated by the indication information is located. The first segment of the first region is fixed in the second frequency band from the first N1 OFDM symbols, for example, N1=1, 2 or 3, and the like.

The fourth principle: the two-stage DMRS uses the indication indicated by the indication information of the additional DMRS, wherein the indication information indicates the location of the two DMRSs in the frequency band when the frequency hopping is not hopping, wherein when the indication information indicates that the frequency band is in the frequency band For each DMRS location, two locations can be selected as the 2-segment DMRS location, for example, the first and last ones are selected as the 2-segment DMRS locations.

According to a fifth principle, the 2-segment DMRS is located at a predetermined symbol position. For example, each DMRS of the two DMRSs includes one symbol, and the two DMRSs may include the first, third, and fifth of the second frequency band. Two symbols in the symbol, or the two-segment DMRS may include two of the 8th, 10th, and 12th symbols in the entire resource scheduling unit.

Optionally, the location of the 2-segment DMRS may also be bound to (or have a corresponding relationship with) the frame structure or the symbol position of the PUSCH (or the location of the first region), and a frame structure or a PUSCH symbol position may correspond to one. The embodiment of the present application is not limited thereto.

The symbol position of the 2-terminal DMRS can be configured by signaling, and the embodiment of the present application is not limited thereto.

In the sixth principle, the first DMRS of the two DMRSs is located in the first symbol, and the second DMRS is located in one of the candidate sets. For example, the second DMRS is located in one of the symbols 10 and 12 in the entire scheduling unit, and the embodiment of the present application is not limited thereto.

Optionally, the location of the second DMRS may also be bound to (or have a corresponding relationship with) the frame structure or the symbol position (or the first region location) of the PUSCH, and a frame structure or a PUSCH symbol position may correspond to one type. The position of the application is not limited to this.

The seventh principle: the first segment of the two-stage DMRS is fixed in the entire second frequency band, the first N1 OFDM symbols; the second segment is the Mth symbol after the first segment (M=1/2/ 3/4).

The eighth principle: the first segment of the two-stage DMRS, N1 after the first DMRS of the first frequency band; the Mth symbol after the first segment of the second frequency segment (N1=2*M; M =1/2/3/4)

It should be understood that the above description describes the locations of a DMRS having a segment in both the first frequency band and the second frequency band. And the specific location when there are two DMRSs in the first frequency band and the second frequency band. In an actual application, the location of the DMRS in the type 2-I may be any combination of the specific positions of the DMRS in the first frequency band and the second frequency band, and the embodiment of the present application is not limited thereto. That is to say, after the type 2-I is determined, 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.

Similarly, the location of the DMRS in Type 2-II may be different from the foregoing, for the first frequency band, there are two DMRSs, and for the second frequency band, there are only one combination of the positions of one DMRS, and the embodiment of the present application does not. Limited to this. That is to say, after the type 2-II is determined, the network device and the terminal device can determine the DMRS pattern according to a preset rule, that is, a specification of any combination of the above.

Similarly, the location of the DMRS in Type 2-III may be different from the foregoing for the first frequency band, only one DMRS, and for the second frequency band, there are two combinations of locations of the DMRS. Limited to this. That is to say, after the type 2-III is determined, the network device and the terminal device can determine the DMRS pattern according to a preset rule, that is, a specification of any combination of the above.

Optionally, in an actual application, the location of the DMRS in the foregoing three types 2 may be configured by the network device to the terminal device by using signaling, for example, may be configured by using RRC, DCI, or MAC CE signaling, and the embodiment of the present application does not Limited to this.

The following is a specific example of the DMRS pattern corresponding to the four types in the above-mentioned FIG. 20 in the case of the uplink transmission in the frequency hopping mode as an example.

In order to make the embodiment of the present application easier to understand, before describing the method of the embodiment of the present application, the partial nouns in the embodiment of the present application are first defined as follows:

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

It should be understood that the terminal device can determine the location of the DMRS according to the additional DMRS configuration, and thus can perform DMRS and data transmission.

It should be understood that, in this embodiment of the present application, the additional DMRS configuration parameter may be configured by one or several of RRC, DCI, and MAC CE.

It should be understood that the accessory DMRS configuration parameter in the embodiment of the present application may also be referred to as the nearby DMRS indication information. The embodiment of the present application is not limited thereto, and the additional DMRS indicates the DMRS after the pre-load DMRS, the additional DMRS indication information or the additional DMRS. The configuration parameter is for indicating at least one of: whether the additional DMRS, the number of the additional DMRSs, and the location of the additional DMRS are present.

It should be understood that the pre-load DMRS has only one segment. When the additional DMRS configuration parameter is configured with the accessory DMRS, the entire resource scheduling unit includes at least two DMRSs, wherein the first segment DMRS is the pre-load DMRS, and the remaining DMRSs are the accessory DMRS.

In the following, the case where the DMRS configuration parameters are configured through RRC is first described.

The number of additional DMRSs may be configured by an uplink additional DMRS number (UL_DMRS_add_num) or an uplink DMRS number (UL_DMRS_num). For example, UL_DMRS_add_num=0, indicating that there is no additional DMRS; UL_DMRS_add_num=N (N>0), indicating that there are N additional DMRSs. UL_DMRS_num=1, indicating that there is no additional DMRS; UL_DMRS_num=N (N>1), indicating that there are N-1 additional DMRSs. Optionally, in the embodiment of the present application, the number of additional DMRSs may also be implemented indirectly through the DMRS type, for example, an index number is indexed to a certain type of DMRS, and the DMRS implies whether there is an additional DMRS and several additional DMRSs. In other words, in the embodiment of the present application, the mapping between the index and the number of DMRSs may be established, where an index number corresponds to a DMRS number, and in an actual application, an index number may be indicated to indicate the DMRS corresponding to the index number. number.

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 one.

It should be understood that, after the number of DMRSs is configured in the embodiment of the present application, the terminal device may determine the location of each DMRS according to a preset rule. Optionally, in the embodiment of the present application, each DMRS may also be determined according to the configured additional DMRS location parameter. Location, the embodiment of the present application is not limited thereto.

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

The additional DMRS location may be configured by an uplink additional DMRS location (UL_DMRS_add_pos) or an uplink DMRS location (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, where 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 indicate that there are 1, 2 or 3 additional DMRSs. Wherein, N1=3 indicates that the first additional DMRS is separated from the first DMRS by 3 symbols, or indicates that the first additional DMRS occupies the third symbol, for example, when the first additional DMRS occupies 2 symbols, N1= At 3 o'clock, the first additional DMRS occupies the 3rd and 4th symbols.

UL_DMRS_pos={N1} (for example, 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 an additional DMRS, wherein the number of non-zero parameters in the value of UL_DMRS_pos is decremented by 1, indicating the number of additional DMRS.

The additional DMRS indication information may be configured by an uplink additional DMRS location (UL_DMRS_add_pos) or an uplink additional DMRS indication (UL_DMRS_add_indication).

Specifically, as shown in the first embodiment, in the embodiment of the present application, the one-to-one correspondence between the indication information, that is, the UL_DMRS_add_pos/UL_DMRS_add_indication and the DMRS position, may be set. In the embodiment of the present application, the specific value may be indicated by the indication information, for example, As shown in Table 1, the indication information takes a value of 0-p to indicate the DMRS location corresponding to the one value. For example, when the indication information is 0, the corresponding DMRS position is N0, indicating that no DMRS is added, and the DMRS in the pre-load pattern occupies the N0 symbol ((No add DMRS, FL at N0)); When it is 3, the corresponding DMRS position is N0+N3, indicating that there is an additional DMRS, and occupying the N0+N3 symbols (1 add DMRS at N0+N3), it should be understood that the N0+N3 symbol indicates the additional DMRS. The first symbol in at least one of the consecutive consecutive symbols. When the indication information is taken as p, the corresponding DMRS position is N0+N1, N0+N2, N0+N3, indicating that there are three additional DMRSs, and occupy N0+N1, N0+N2, and N0+N3 symbols, respectively. .

It should be understood that, in the embodiment of the present application, the number of different accessory DMRSs may correspond to different forms, and the content in the table is of the type of Table 1 and will not be further described herein. Thus, the corresponding table may be determined by the number of attached DMRSs. The table includes a correspondence between the value of the indication information and the location of the DMRS. Therefore, the location of the DMRS can be indicated by a specific value of the indication information.

Table 1

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

The first form, data trigger: RRC completes the additional DMRS configuration, as long as there is data transmission, there may be additional MDRS, that is, according to the additional pattern to send data.

The second form, MAC CE activation, Data trigger: After the RRC completes the additional DMRS configuration, after the MAC CE is activated (for example, after UL_DMRS_add_active=1), the data is sent with additional DMRS; if the MAC CE is deactivated (for example, UL_DMRS_add_active=0), There will be no additional DMRS.

The third form, DCI trigger: After the RRC completes the additional DMRS configuration, the trigger in the DCI (for example, UL_DMRS_add_flag=1), the transmitted data has additional DMRS; the DCI is not triggered (for example, UL_DMRS_add_flag=0), and the transmitted data has no additional DMRS.

The foregoing describes the manner in which the DMRS configuration is configured by the RRC. Similarly, in the embodiment of the present application, the DMRS may be configured by using the MAC CE.

Similar to the RRC configuration, the additional DMRS can also be configured through the MAC CE. The MAC CE can be configured with the number of additional DMRSs or the location of the additional DMRS or the indication information of the additional DMRS. For the specific configuration of the signaling format and the signaling function, refer to the corresponding signaling in the RRC configuration. To avoid repetition, details are not described herein again.

It should be understood that, in the embodiment of the present application, after the MAC CE completes the additional DMRS configuration, it does not mean that the additional DMRS will be triggered or activated. After the RRC completes the configuration, the following two forms can be triggered to trigger the additional DMRS.

The first form, data triggering: MAC CE completes the additional DMRS configuration, as long as there is data to send, there is additional MDRS;

The second form, DCI trigger: MAC CE completes the additional DMRS configuration, triggers in the DCI (for example, UL_DMRS_add_flag=1), the transmitted data has additional DMRS; the DCI is not triggered (for example, UL_DMRS_add_flag=0), and the transmitted data has no additional DMRS.

The manner in which the DMRS configuration is configured by the RRC and the MAC CE is described above. Similarly, the DMRS may be configured through the DCI in the embodiment of the present application.

Similar to the configuration through RRC or MAC CE, configuring additional DMRS through DCI can be configured by configuring the number of additional DMRS or the location of additional DMRS or the indication of additional DMRS. For the specific signaling form and function, refer to the corresponding signaling in the RRC configuration. To avoid repetition, details are not described here.

The DCI is configured with additional DMRS and the additional DMRS is triggered.

It should be understood that, in the additional DMRS configuration, the corresponding parameters may be configured by using the signaling itself. Optionally, the one-to-one correspondence (table) of various signaling values and indexes may also be established in the embodiment of the present application. When configuring DMRS, you can configure the corresponding index number directly through RRC, MAC CE, or DCI.

The specific meanings of the configuration parameter configuration mode and each configuration parameter in the embodiment of the present application are described above. In the following, how to determine the DMRS pattern in the frequency hopping mode of the uplink transmission according to the foregoing configuration parameters, that is, the scheme of determining the pattern corresponding to the specific type in FIG. 20 is determined.

Specifically, the communications device determines, by using the indication information of the additional DMRS, the DMRS pattern corresponding to the frequency hopping mode, where the additional DMRS indicates the DMRS after the pre-load DMRS, and the indication information is used to indicate at least one of the following: The additional DMRS, the number of the additional DMRSs, and the location of the additional DMRS, where the frequency hopping mode indicates that one of the symbols in one resource scheduling unit is in the first frequency band, and the other part of the symbol is in the second frequency band.

The communication device performs mapping or demapping of the DMRS using the DMRS pattern.

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 the first frequency band, and a symbol in the second frequency band. , wherein a segment of the symbol includes at least one symbol in succession.

Optionally, as an embodiment, a segment of the first frequency band includes a first symbol in a first region of the first frequency band, where the first region includes a symbol occupied by the data and the DMRS.

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

Optionally, as an embodiment, when the indication information is used to indicate that the additional DMRS exists, the DMRS in the DMRS pattern occupies the number of symbols and the location in the first frequency band, and the occupied second frequency band The number of symbols and the position of the symbol are the same as the number of segments and positions indicated by the indication information when the frequency hopping is not performed.

Optionally, as an embodiment, when the indication information is used to indicate that the additional DMRS exists,

The DMRS in the DMRS pattern occupies two consecutive symbols in the first frequency band, and two non-contiguous symbols in the second frequency band,

or,

The DMRS in the DMRS pattern occupies two consecutive symbols in the first frequency band and a symbol in the second frequency band.

or,

The DMRS in the DMRS pattern occupies a segment of the first frequency band and two consecutive symbols in the second frequency band,

Wherein each of the two segments of symbols comprises a continuous indication of a symbol, the segment of the symbol comprising at least one symbol in succession.

Optionally, as an embodiment, when the DMRS in the DMRS pattern occupies two consecutive symbols in the first frequency band, the next one of the two symbols in the first frequency band includes the first frequency band. The last symbol;

or,

When the DMRS occupies two consecutive symbols in the second frequency band in the DMRS pattern, the previous one of the two frequency symbols in the second frequency band includes the first symbol in the second frequency band.

A specific example of determining a hopping pattern according to the additional DMRS configuration parameter (ie, the indication information of the additional DMRS) in the embodiment of the present application is described below in conjunction with a specific column.

Case 1:

The same set of parameters is used for frequency hopping and frequency hopping. In other words, no new additional DMRS configuration parameters are needed. In the frequency hopping mode, the pattern after frequency hopping is type 1 regardless of the value of the additional DMRS configuration parameter when the frequency hopping is not hopped.

Specifically, in the embodiment of the present application, the frequency hopping mode may be triggered by signaling, for example, one or more of RRC, DCI, and MAC CE, after the terminal device obtains the signaling of the triggering frequency hopping mode. , you can transfer DMRS and data according to type 1.

Optionally, the DCI triggers the frequency hopping mode as an example. The number of signaling is format 0 (format 0), the resource configuration type is 0 (Resource allocation type=0), and the frequency hopping flag bit is 1 (Frequency hopping flag). When =1), the corresponding pattern will adopt type 1.

It should be understood that in this case, the additional DMRS configuration parameters will not work when there is no frequency hopping. That is to say, the frequency hopping mode is not activated, that is, the number of signaling is format 0 (format 0), the resource configuration type is not 0 (Resource allocation type ≠ 0), or there is no resource allocation type (no Resource allocation type). When the parameter or frequency hopping flag is 0 (Frequency hopping flag = 0), the additional DMRS configuration parameter takes effect.

Case 2:

No frequency hopping and frequency hopping, each corresponding to its own additional DMRS configuration parameters. In other words, a separate set of additional DMRS configuration parameters is required for the frequency hopping mode.

In other words, in this case, when there is no frequency hopping, use a set of additional DMRS configuration parameters (which can be called the first set of configuration parameters), and when hopping, use another set of additional DMRS configuration parameters (can be called The second set of configuration parameters).

It should be understood that the types and functions of each set of configuration parameters can be referred to the description above, and in order to avoid repetition, details are not described herein again.

Specifically, in the embodiment of the present application, the frequency hopping mode may be triggered by signaling, for example, one or more of RRC, DCI, and MAC CE, after the terminal device obtains the signaling of the triggering frequency hopping mode. , the data transmission can be performed according to the second set of configuration parameters.

Optionally, the DCI triggers the frequency hopping mode as an example. The number of signaling is format 0 (format 0), the resource configuration type is 0 (Resource allocation type=0), and the frequency hopping flag bit is 1 (Frequency hopping flag). When =1), it corresponds to the second set of configuration parameters.

It should be understood that the first set of configuration parameters will not work when there is no frequency hopping. That is to say, the frequency hopping mode is not activated, that is, the number of signaling is format 0 (format 0), the resource configuration type is not 0 (Resource allocation type ≠ 0), or there is no resource allocation type (no Resource allocation type). When the parameter or frequency hopping flag is 0 (Frequency hopping flag = 0), the first set of configuration parameters will take effect.

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. .

The following will give an example of the situation. In case 2-1 to 2-3, when the frame structure cannot meet the requirement, that is, when the symbol interval between two DMRSs in one frequency band of the frequency hopping does not meet the interval requirement, in order to ensure the uniformity of the pattern type. , no frequency hopping. In case 2-4 to case 2-6, when the frame structure cannot meet the requirement, that is, when the symbol interval between two DMRSs in one frequency band of the frequency hopping does not satisfy the interval requirement, the backoff is performed, and the band is in the band. The number of DMRSs is reduced to one, which ensures the enabling of frequency hopping.

Case 2-1,

The second set of configuration parameters (for example, UL_DMRS_add_type_hopping=0) indicates that the pattern corresponding to the frequency hopping mode is type 1, and the terminal device transmits the DMRS and the data according to the pattern corresponding to the type 1 at the time of frequency hopping.

or,

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 transmits the DMRS and the data according to the pattern corresponding to the type 2-I at the time of frequency hopping. Wherein, if the symbol interval between two DMRSs in any one of the two frequency bands does not meet the interval requirement, the frame structure does not perform frequency hopping. The interval requirement is that the interval data between the two DMRSs is greater than or equal to the preset interval threshold value N _j , where N _j can be a value of 1, 2, or 3, etc., and the embodiment of the present application is not limited thereto.

Case 2-2,

or,

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 transmits the DMRS and the data according to the pattern corresponding to the type 2-II at the time of frequency hopping. Wherein, if the symbol interval between two DMRSs 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 is that the interval data between the two DMRSs is greater than or equal to the preset interval threshold value N _j , where N _j can be a value of 1, 2, or 3, etc., and the embodiment of the present application is not limited thereto.

Case 2-3,

or,

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 transmits the DMRS and the data according to the pattern corresponding to the type 2-III at the time of frequency hopping. Wherein, if the symbol interval between two DMRSs 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 is that the interval data between the two DMRSs is greater than or equal to the preset interval threshold value N _j , where N _j can be a value of 1, 2, or 3, etc., and the embodiment of the present application is not limited thereto.

It should be understood that the above-mentioned requests 2-1 to 2-3 assume that the network device and the terminal device pre-store two kinds of pattern types (ie, type 1 and one of three types 2), wherein, in UL_DMRS_add_type_hopping=0, corresponding The pattern type 1 corresponds to another pattern of the pre-stored two pattern types when UL_DMRS_add_type_hopping=1, that is, a 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 foregoing four pattern types, and pre-store four types as an example, in UL_DMRS_add_type_hopping=0, corresponding to pattern type 1; in UL_DMRS_add_type_hopping=1, corresponding pattern type 2 -I; in UL_DMRS_add_type_hopping=2, corresponding to pattern type 2-II; in UL_DMRS_add_type_hopping=3, corresponding to pattern type 2-III.

Case 2-4,

or,

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 both frequency bands satisfy the DMRS interval requirement, and the terminal device follows the pattern corresponding to the type 2-I at the time of frequency hopping. Send DMRS and data.

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 satisfies the DMRS interval requirement, and the latter frequency band does not satisfy the DMRS interval requirement, then the frequency hopping time The terminal device transmits the DMRS and the data according to the pattern corresponding to the type 2-II.

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 satisfies the DMRS interval requirement, and then the frequency hopping time The terminal device transmits the DMRS and the data according to the pattern corresponding to the type 2-III.

Case 2-5,

or,

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 previous frequency band satisfies the DMRS interval requirement, and the terminal device transmits according to the pattern corresponding to the type 2-II during frequency hopping. DMRS and data.

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-II, and the previous frequency band does not meet the DMRS interval requirement, and the terminal device follows the type 1 corresponding pattern during frequency hopping. Send DMRS and data.

Case 2-6,

or,

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 latter frequency band satisfies the DMRS interval requirement, and the terminal device sends the pattern corresponding to the type 2-III at the time of frequency hopping. DMRS and data.

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-II, and the latter frequency band does not satisfy the DMRS interval requirement, and the terminal device follows the pattern corresponding to the type 1 at the time of frequency hopping. Send DMRS and data.

Case 3:

The frequency hopping mode multiplexes the additional DFRS configuration parameters that are not hopped, and the parameters have the same meaning.

Specifically, in the case that the additional DMRS configuration parameter is configured with additional DMRS, that is, in the case of including two DMRSs, the terminal device can perform frequency hopping when transmitting data, and the location of the DMRS after frequency hopping is The location of the DMRS configured with the additional hopping additional DMRS configuration parameters is the same.

Optionally, the DCI triggers the frequency hopping mode as an example. The number of signaling is format 0 (format 0), the resource configuration type is 0 (Resource allocation type=0), and the frequency hopping flag bit is 1 (Frequency hopping flag). =1), and the additional DMRS is configured, that is, based on at least two DMRSs, for example, UL_DMRS_add_num=N (N>0), or UL_DMRS_add_pos={N1 or N1+N2 or N1+N2+N3} When (N1>0, N2>0, N3>0), the terminal device uses the frequency hopping mode when transmitting uplink data.

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 location of the DMRS in the DMRS pattern corresponding to the frequency hopping mode are the same as the number and location of the DMRS configured in the additional DMRS configuration parameter when the frequency hopping is not hopped.

Optionally, in the third case, in the case that the additional DMRS configuration parameter is not configured with the additional DMRS, the DMRS configuration parameter that is not hopped may be multiplexed in the embodiment of the present application, for example, changing the value of the additional DMRS configuration parameter. The additional DMRS is configured, 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 location of the DMRS in the DMRS pattern corresponding to the frequency hopping mode are the same as the number and location of the DMRS configured in the additional DMRS configuration parameter changed after the hopping.

That is to say, in the case where two DMRSs are included, the terminal device can perform frequency hopping when transmitting data, and the position of the hopped DMRS is the same as the position of the DMRS configured by the unhopped additional DMRS configuration parameter.

Situation 4:

The frequency hopping mode multiplexes the additional DMRS configuration parameters that are not hopped, but the parameters have different meanings.

Specifically, taking the DCI trigger frequency hopping mode as an example, the number of signaling is format 0 (format 0), the resource configuration type is 0 (Resource allocation type=0), and the frequency hopping flag is 1 (Frequency hopping flag) =1), if the additional DMRS configuration parameter is configured with additional DMRS, that is to say, in the case of including two DMRSs, 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 is not configured with additional DMRS, that is, if a DMRS is included, the frequency hopping mode uses type 1.

It should be understood that in case 4, if the additional DMRS configuration parameter is configured with additional DMRS, that is, in the case of including two DMRSs, the frequency hopping mode is in Type 2-I, Type 2-II, and Type 2-III. One kind.

The following will give an example of the situation. In case 4-1 to case 4-3, when the frame structure cannot meet the requirement, that is, when the symbol interval between two DMRSs in one frequency band of the frequency hopping does not meet the interval requirement, in order to ensure the uniformity of the pattern type. , no frequency hopping. In case 4-4 to case 4-6, when the frame structure cannot meet the requirement, that is, when the symbol interval between two DMRSs in one frequency band of the frequency hopping does not satisfy the interval requirement, the number of DMRSs in the band is lowered. One to the other, thus ensuring the frequency hopping enable.

Case 4-1,

The additional DMRS configuration parameter is not configured with additional DMRS. That is to say, when a DMRS is included, after the frequency hopping, the corresponding pattern is type 1.

or,

The additional DMRS configuration parameter is configured with additional DMRS, that is, when at least two DMRSs are included, after the frequency hopping, the corresponding pattern is type 2-I. Wherein, if the symbol interval between two DMRSs in any one of the two frequency bands does not meet the interval requirement, the frame structure does not perform frequency hopping. The interval requirement is that the interval data between the two DMRSs is greater than or equal to the preset interval threshold value N _j , where N _j may be a value of 1, 2, or 3, etc., and the embodiment of the present application is not limited thereto.

Case 4-2,

or,

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

Case 4-3,

or,

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

Case 4-4,

or,

The additional DMRS configuration parameter is configured with additional DMRS, that is, when at least two DMRSs are included, and both frequency bands satisfy the DMRS interval requirement, the terminal device transmits the DMRS and the data according to the pattern corresponding to the type 2-I at the time of frequency hopping.

Alternatively, the additional DMRS configuration parameter is configured with additional DMRS, that is, when at least two DMRSs are included, and the previous frequency band satisfies the DMRS interval requirement, and the latter frequency band does not satisfy the DMRS interval requirement, the terminal device according to the type 2 during frequency hopping The pattern corresponding to -II sends DMRS and data.

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

Case 4-5,

or,

The additional DMRS configuration parameter is configured with additional DMRS, that is, when at least two DMRSs are included, and the previous frequency band satisfies the DMRS interval requirement, the terminal device transmits the DMRS and the data according to the pattern corresponding to the type 2-II at the time of frequency hopping.

Alternatively, the additional DMRS configuration parameter is configured with 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 transmits the DMRS and the data according to the pattern corresponding to the type 1 at the time of frequency hopping.

Case 4-6,

or,

The additional DMRS configuration parameter is configured with additional DMRS, that is, when at least two DMRSs are included, and the latter frequency band satisfies the DMRS interval requirement, the terminal device transmits the DMRS and the data according to the pattern corresponding to the type 2-III at the time of frequency hopping.

Alternatively, the additional DMRS configuration parameter is configured with additional DMRS, that is, when at least two DMRSs are included, and the latter frequency band does not satisfy the DMRS interval requirement, the terminal device transmits the DMRS and the data according to the pattern corresponding to the type 1 at the time of frequency hopping.

Optionally, in case four, if the additional DMRS is not configured in the additional DMRS configuration parameter, frequency hopping is performed according to the pattern corresponding to type 1.

When the 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 location of the DMRS in the DMRS pattern corresponding to the frequency hopping mode are the same as the number and location of the DMRS configured in the additional DMRS configuration parameter when the frequency hopping is not hopped.

It should be understood that, in the above case 1 to case 4, after determining one of the types in the above 4, any one of the plurality of patterns corresponding to the type described above may be used, which is not limited by the embodiment of the present application. . For the drawings corresponding to each class, refer to the description above, and details are not described herein again.

The following describes the multiplexing relationship of the two types of waveform devices corresponding to the DMRS when the device using the single-carrier DFT-s-OFDM waveform and the multi-user MU using the multi-carrier CP-OFDM are described.

The division of the DMRS between the CP-OFDM and the DFT-s-OFDM can be performed by frequency division multiplexing (FDM) or time division mulriplexing (TDM). The TDM is as shown in Figure 36. 37 is shown. That is, in some scenarios, NR supports two types of waveforms to be multiplexed by FDM; in some scenarios, two types of waveforms are supported for multiplexing by TDM.

Among them, in (1) and (2) in FIG. 36, CP-OFDM and DFT-s-OFDM are independently numbered, multi-carrier uses port 1-12, and multi-carrier uses port 13-16.

In (3) of FIG. 36, CP-OFDM and DFT-s-OFDM are jointly numbered, and ports 1-12 are shared.

In (1) and (2) of FIG. 37, CP-OFDM and DFT-s-OFDM are jointly numbered, and ports 1-12 are shared.

In (3) of FIG. 37, CP-OFDM and DFT-s-OFDM are independently numbered, multicarrier uses port 1-12, and single carrier uses port 13-16.

The frequency division multiplexing or the time division multiplexing can be adopted between the CP-OFDM and the DFT-s-OFDM corresponding DMRS, and can be implemented in the following two manners.

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 is FDM, and the DFT-s-OFDM DMRS is located at the same symbol position as the CP-OFDM. When the number of CP-OFDM ports is greater than or equal to N, the DMRS between the two waveforms is TDM. The symbol position of the DFT-s-OFDM DMRS can be in the following four forms:

The OFDM symbol in which the single carrier is located is after multiple carriers, and is adjacent to multiple carriers (as shown in FIG. 1);

The OFDM symbol in which the single carrier is located is preceded by multiple carriers, and is adjacent to multiple carriers;

The OFDM symbol in which the single carrier is located is after multiple carriers, and is separated from the multiple carriers by N symbols (N is greater than or equal to 1);

The OFDM symbol in which the single carrier is located is preceded by multiple carriers and separated from the multiple carriers by N symbols (N is greater than or equal to 1).

Method 2: Configuring/indicating the symbol position of the DMRS of the DFT-s-OFDM by signaling, implying a multiplexing manner with the DMRS of the CP-OFDM.

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

(1) The symbol position of the DMRS of the DFT-S-OFDM is directly indicated by the signaling indication (for example, RRC, MAC CE, DCI); when the indicated position is the same as the DMRS of the CP-OFDM, between the two waveforms DMRS uses FDM; when the positions are different, the DMRS between the two waveforms uses TDM.

(2) The symbol position of the DMRS of the DFT-S-OFDM, indicated by the signaling indication (for example, RRC, MAC CE, DCI), the DMRS symbol position, for example, "0" indicates the symbol position and CP of the DFT-S-OFDM DMRS. - OFDM location is the same, FDM is used between the two; "1" indicates that the symbol position of the DFT-S-OFDM DMRS is located next to the location of the DMRS of the CP-OFDM, and thereafter;

(3) The symbol position of the DMRS of DFT-S-OFDM is indicated by the port number. For example, the DMRS port number of DFT-S-OFDM is 1-12, indicating the DMRS symbol of DFT-S-OFDM and DMRS of CP-OFDM. The location is the same, FDM is used between the two; when the DFT-S-OFDM DMRS port number is 13-16, it means that it is in close proximity to CP-OFDM, and thereafter.

The following describes the case of the DMRS pattern corresponding to the current mode of the embodiment of the present application in the first case and the second case when the current mode is the aggregation mode.

Optionally, in an embodiment, when the current mode is the aggregation mode, the aggregation mode is corresponding to the Y resource scheduling unit aggregation transmission, and Y is an integer greater than or equal to 2; as shown in FIG. 14, the current mode corresponding to the DMRS pattern occupied by the DMRS resource scheduling unit Y in at least one symbol before consecutive Y ₁ each resource scheduling unit in a single resource scheduling, Y ₁ is equal to or greater than 1 and less than An integer of Y. Fig. 12 shows a case where Y = 3 and Y ₁ = 1.

FIG. 15 shows that in the current mode, in the aggregation mode, the DMRS is still transmitted according to the location in the preset pattern shown in FIG. 5. As can be seen from FIG. 15, the DMRS in the preset DMRS pattern occupies Y resource scheduling. At least one symbol consecutive in each resource scheduling unit in the unit,

Since the channel state is relatively stable in the scenario of the first case, and the channel states of the Y resource scheduling units are similar due to the joint transmission of the Y resource scheduling units, the data demodulation can be realized only by transmitting a small number of DMRSs. Since DMRS is transmitted in each resource scheduling unit in FIG. 15, a waste of resources is caused.

In the embodiment of the present application, in the aggregation mode, the DMRS only occupies the symbols in the first Y ₁ resource scheduling units in the Y transmissions, which reduces the resources occupied by the DMRS, avoids resource waste, and improves network performance. .

Optionally, as an embodiment, when the current mode is an aggregation mode, the aggregation mode corresponds to Y resource scheduling units to aggregate transmission, and Y is an integer greater than or equal to 2. For the above two cases, the application of the present embodiment, as shown in FIG. 16, the current mode corresponding to the DMRS pattern occupied by the DMRS symbols Y _{group. 1} L resource units in each scheduling resource scheduling unit, L ₁ is less than L An integer, wherein the L ₁ set of symbols are not adjacent, each set of the L ₁ set of symbols includes a continuous at least one symbol, wherein L ₁ =1 is shown in FIG. 16 , and the set of symbols includes A symbolic situation.

FIG. 17 shows that in the current mode, in the aggregation mode, the DMRS is still transmitted according to the location in the preset pattern shown in FIG. 6. As can be seen from FIG. 17, the DMRS in the preset DMRS pattern occupies Y resource scheduling. The L group symbol in each resource scheduling unit in the unit, L is an integer greater than or equal to 2, wherein the L group symbols are not adjacent, and each group symbol in the L group symbol includes consecutive at least one symbol.

It can be seen from FIG. 17 that in the aggregation mode, each resource scheduling unit has a case where the DMRSs occupy the L group symbols. However, in the aggregation mode, multiple resource scheduling units jointly transmit, and therefore, the joint transmission is more The channels of the resource scheduling units have a certain relationship, so that accurate demodulation of data can be achieved by less DMRS. However, since each group of resource scheduling units in FIG. 17 transmits L groups of DMRSs, resource waste is caused.

In the embodiment of the present application, in the aggregation mode, the DMRS only occupies the L ₁ group symbol in each resource scheduling unit of the Y resource scheduling units that are aggregated and transmitted, which reduces the resources occupied by the DMRS, thereby avoiding resource waste and improving. Network performance.

It should be understood that an example in which L is 2 is described in FIG. 16, but the embodiment of the present application is not limited thereto, and the DMRS in each resource scheduling unit may occupy multiple groups of symbols, for example, occupy 3 groups, 4 groups or more groups of symbols. Wait. Similarly, only the case of L ₁ =1 is shown in FIG. 16, but the embodiment of the present application is not limited thereto as long as L _{1 is} smaller than L.

It should be noted that, in the prior art, in the frequency hopping mode, the DMRS is still transmitted according to the position in the preset pattern shown in FIG. 6. As can be seen from FIG. 17, the DMRS of the entire aggregated resource is The distribution is not uniform. Because the receiving end needs to use DMRS to demodulate the subsequent data, because the spacing between adjacent DMRS symbols is not uniform, when the adjacent two groups of DMRS symbols have a large spacing, the receiving end receives the front. After the transmitted DMRS, the data after the DMRS needs to be demodulated. Due to the large spacing, the channel state fluctuation may occur, and the data demodulation may be insufficiently accurate. Similarly, in the adjacent two groups of DMRSs. When the symbol spacing is small, the channel state may be relatively stable, and the receiving device receives a set of DMRSs after a short symbol interval, resulting in waste of resources.

Alternatively, in the embodiment of the present application, as shown in FIG. 18, the DMRS in the DMRS pattern corresponding to the current mode occupies L groups of symbols in each resource scheduling unit of the Y resource scheduling units, and the DMRS pattern corresponding to the current mode. The maximum difference between the spacing of any two adjacent symbols in the Y*L group symbol occupied by the DMRS is S symbols, S<R, where the DMRS occupied by the DMRS in the preset DMRS pattern is in the Y*L group symbol The maximum difference between the spacing of any two adjacent sets of symbols is R symbols. For example, as shown in FIG. 17, the maximum distance between two groups of symbols connected is 8 symbols, and the minimum interval between two groups of symbols is 4 symbols, so the R=8-4=4, as shown in FIG. It is shown that the maximum distance between the two groups of symbols is 6 symbols, and the minimum distance between the two groups of symbols is 6 symbols, S=6-6=0.

It should be noted that the examples of the above embodiments are only intended to help those skilled in the art to understand the embodiments of the present application, and the embodiments of the present application are not limited to the specific numerical values or specific examples illustrated. A person skilled in the art will be able to make various modifications or changes in the embodiments according to the examples given above, and such modifications or variations are also within the scope of the embodiments of the present application.

A method for transmitting a DMRS according to an embodiment of the present application is described in detail above with reference to FIG. 1 through FIG. 37. The communication device of the embodiment of the present application will be described in detail below with reference to FIG.

FIG. 19 shows a schematic block diagram of a communication device 1900, which may be a network device or a terminal device, in accordance with an embodiment of the present application. Specifically, as shown in FIG. 19, the communication device 1900 includes a processor 1910 and a transceiver 1920.

The processor is configured to determine a current mode of the 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 one resource scheduling unit is located in the first frequency band, and another part of the symbol is located in the second frequency band, the aggregation The mode indicates that multiple resource scheduling units aggregate transmissions;

The transceiver is configured to perform mapping or demapping of the DMRS by using the DMRS pattern corresponding to the current mode, where 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.

Therefore, in the embodiment of the present application, the pattern of the DMRS in the current mode 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 the embodiment of the present application can satisfy different modes. Requirements to improve network performance.

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

In the preset DMRS pattern, the DMRS occupies consecutive N symbols in a resource scheduling unit that is not hopped, and N is an integer greater than or equal to 1;

The DMRS pattern corresponding to the current mode occupies consecutive N ₁ symbols in the first frequency band, and consecutive N ₂ symbols in the second frequency band, N ₁ is an integer greater than or equal to 1, and N ₂ is greater than or An integer equal to 1.

Optionally, as another embodiment, the N ₁ =N ₂ , and the position of the N ₁ symbols in the first frequency band is symmetric with the position of the N ₂ symbols in the second frequency band.

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

Optionally, as another embodiment, the current mode is a resource hopping mode,

The DMRS in the preset DMRS pattern occupies consecutive M symbols and consecutive K symbols in a resource scheduling unit that is not hopped, wherein the M symbols are not adjacent to the K symbols;

The DMRS pattern corresponding to the current mode occupies consecutive M ₁ symbols and consecutive K ₁ symbols in the symbol of the first frequency band, and consecutive M ₂ symbols and consecutive K ₂ symbols in the second frequency band Wherein the M ₁ symbols are not adjacent to the K ₁ symbols, the M ₂ symbols are not adjacent to the K ₂ symbols, and M, K, M ₁ , K ₁ , M ₂ , K ₂ are greater than Or an integer equal to 1.

Optionally, as another embodiment, M ₁ =M ₂ , K ₁ =K ₂ , and the M ₁ symbols and the position of the K ₁ symbols in the first frequency band and the M _{2 in} the second frequency band The symbols and the positions of the K ₂ symbols are symmetrical.

Optionally, in another embodiment, the DMRS in the preset DMRS pattern further occupies consecutive P symbols in the resource scheduling unit that is not hopped, the P symbols and the M symbols and the K symbols. Not adjacent;

The DMRS in the DMRS pattern corresponding to the current mode further occupies consecutive P1 symbols in the symbol of the first frequency band, and consecutive P2 symbols in the second frequency band, where the P ₁ symbols and the M ₁ symbols are The K ₁ symbols are not adjacent, and the P ₂ symbols and the M ₂ symbols are not adjacent to the K ₂ symbols, and P, P ₁ , and P ₂ are integers greater than or equal to 1.

Optionally, in another embodiment, the current mode is an aggregation mode, where the plurality of resource scheduling units are Y, and Y is an integer greater than or equal to 2;

The DMRS in the DMRS pattern corresponding to the current mode occupies at least one consecutive symbol in each of the first Y ₁ resource scheduling units in the Y resource scheduling units, and Y ₁ is an integer greater than or equal to 1 and less than Y.

Optionally, in another embodiment, the current mode is an aggregation mode, and the multiple resource scheduling units are Y.

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

The DMRS in the DMRS pattern corresponding to the current mode occupies the L ₁ group symbol in each resource scheduling unit of the Y resource scheduling units, and L ₁ is an integer smaller than L, wherein the L ₁ group symbols are not adjacent, and the L ₁ group of symbols each symbol comprising a set of at least one consecutive symbols.

The DMRS in the preset DMRS pattern occupies L group symbols in each resource scheduling unit of the Y resource scheduling units, and the DMRS pattern corresponding to the current mode occupies the L group in each resource scheduling unit of the Y resource scheduling units. a symbol, where L is an integer greater than or equal to 2, wherein the L sets of symbols are not adjacent, and each set of symbols in the L set of symbols includes consecutive at least one symbol,

The maximum difference between the spacings of any two adjacent symbols in the Y*L group symbol occupied by the DMRS in the preset DMRS pattern is R symbols, and the Y*L group symbols occupied by the DMRS in the DMRS pattern corresponding to the current mode. The maximum difference between the spacing of any two adjacent symbols in the middle is S symbols, S < R.

Optionally, in another embodiment, the communications device is a network device, where the transceiver is further configured to send, to the terminal device, first indication information, where the first indication information is used by the terminal device to determine a current mode of the resource scheduling unit.

Optionally, in another embodiment, the communications device is a network device, where the transceiver is further configured 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.

Optionally, as another embodiment, the communications device is a terminal device, where the transceiver is further configured to receive first indication information that is 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;

The processor is specifically configured to determine the current mode according to the first indication information.

Optionally, in another embodiment, the communications device is a terminal device, where the transceiver is further configured to receive, by the network device, second indication information, where the second indication information is used to indicate a DMRS pattern corresponding to the current mode.

It should be understood that the communication device 1900 shown in FIG. 19 can implement various processes related to the network device or the terminal device in the method embodiments of FIGS. 1 to 37. The operations and/or functions of the various modules in the communication device 1900 are respectively implemented in order to implement the corresponding processes in the above method embodiments. For details, refer to the description in the foregoing method embodiments. To avoid repetition, the detailed description is omitted here.

It should be understood that the processor 1910 in the embodiment of the present application may be implemented by a processing unit or a chip. Optionally, the transceiver 1920 may be configured by a transmitter or a receiver, or may be configured by a transceiver unit. The embodiment of the present application is not limited thereto. .

It should be noted that the processor (e.g., processor 1910 in FIG. 19) in the embodiment of the present application may be an integrated circuit chip having signal processing capabilities. In the implementation process, each step of the foregoing method embodiments may be completed by an integrated logic circuit of hardware in a processor or an instruction in a 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 the like. Programming logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor. The software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method.

It is to be understood that the memory (e.g., memory 1930 in FIG. 19) in the embodiments of the present application can be either volatile memory or non-volatile memory, or can include both volatile and non-volatile memory. The non-volatile memory may be a read-only memory (ROM), a programmable read only memory (ROMM), an erasable programmable read only memory (erasable PROM, EPROM), or an electrical Erase programmable EPROM (EEPROM) or flash memory. The volatile memory can be a random access memory (RAM) that acts as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (Synchronous DRAM). SDRAM), double data rate synchronous DRAM (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronously connected dynamic random access memory (synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (DR RAM). It should be noted that the memories of the systems and methods described herein are intended to comprise, without being limited to, these and any other suitable types of memory.

The embodiment of the present application further provides a computer readable medium having stored thereon a computer program, which is implemented by a computer to implement the method for transmitting a DMRS in any of the foregoing method embodiments.

The embodiment of the present application further provides a computer program product, which is implemented by a computer to implement the method for transmitting a DMRS in any of the foregoing method embodiments.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may 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 processes or functions described in accordance with embodiments of the present application are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transmission to another website site, computer, server or data center via wired (eg coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media. The usable 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)) and so on.

The embodiment of the present application further provides a processing apparatus, including a processor and an interface, where the processor is configured to perform a method for transmitting a DMRS in any one of the foregoing method embodiments.

It should be understood that the foregoing processing device may be a chip, and the processor may be implemented by hardware or by software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc.; The processor may be a general purpose processor implemented by reading software code stored in the memory. The memory may be integrated in the processor and may exist independently of the processor.

It is to be understood that the phrase "one embodiment" or "an embodiment" or "an embodiment" or "an embodiment" means that the particular features, structures, or characteristics relating to the embodiments are included in at least one embodiment of the present application. Thus, "in one embodiment" or "in an embodiment" or "an" In addition, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in the various embodiments of the present application, the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not be applied to the embodiment of the present application. The implementation process constitutes any limitation.

Additionally, the terms "system" and "network" are used interchangeably herein. The term "and/or" in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

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 from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both, for clarity of hardware and software. Interchangeability, the composition and steps of the various examples 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 solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of cells is only a logical function division. In actual implementation, there may be another division manner. For example, multiple units or components may be combined or integrated. Go to 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 may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.

The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present application.

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 integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present application can be implemented by hardware implementation, firmware implementation, or a combination thereof. When implemented in software, the functions described above may be stored in or transmitted as one or more instructions or code on a computer readable medium. Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A storage medium may be any available media that can be accessed by a computer. By way of example and not limitation, computer readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage media or other magnetic storage device, or can be used for carrying or storing in the form of an instruction or data structure. The desired program code and any other medium that can be accessed by the computer. Also. Any connection may suitably be a computer readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable , fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fixing of the associated media. As used herein, a disk and a disc include a compact disc (CD), a laser disc, a compact disc, a digital versatile disc (DVD), a floppy disc, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.

In summary, the above description is only a preferred embodiment of the technical solution of the present application, and is not intended to limit the scope of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application are intended to be included within the scope of the present application.

Claims

A method for transmitting a demodulation reference signal DMRS, comprising:

The communication device determines a current mode of the 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 the symbols in one resource scheduling unit is located in the first frequency band, and another part of the symbol is located in the second frequency band, The aggregation mode indicates that multiple resource scheduling units aggregate transmissions;

The communication device performs mapping or demapping of the DMRS by using the DMRS pattern corresponding to the current mode, where the symbol position occupied by the DMRS in the DMRS pattern corresponding to the current mode and the symbol position occupied by the DMRS in the preset DMRS pattern different.
A communication device, comprising:

Processor and transceiver,

The processor is configured to determine a current mode of the 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 one resource scheduling unit is in a first frequency band, and another part of the symbol is in a second frequency band. The aggregation mode indicates that a plurality of resource scheduling units aggregate transmissions;

The transceiver is configured to perform mapping or demapping of the DMRS by using the DMRS pattern corresponding to the current mode, where the symbol position occupied by the DMRS in the DMRS pattern corresponding to the current mode and the symbol occupied by the DMRS in the preset DMRS pattern The location is different.
The method according to claim 1, or the communication device according to claim 2, wherein the current mode is a frequency hopping mode,

The DMRS in the preset DMRS pattern occupies consecutive N symbols in a resource scheduling unit that is not hopped, and N is an integer greater than or equal to 1;

The DMRS in the DMRS pattern corresponding to the current mode occupies consecutive N 1 symbols in the first frequency band, and consecutive N 2 symbols in the second frequency band, and N 1 is an integer greater than or equal to 1, N 2 Is an integer greater than or equal to 1.
A method according to claim 3 or a communication device according to claim 3, characterized in that

The N 1 =N 2 , and the positions of the N 1 symbols in the first frequency band are symmetric with the positions of the N 2 symbols in the second frequency band.
A method according to claim 3 or a communication device according to claim 3, characterized in that

The N 2 symbols include a first symbol in the second frequency band.
A method according to claim 3 or 5, or a communication device according to claim 3 or 5, characterized in that

The N 1 symbols include a first symbol in a first region of the first frequency band, and the first region is a symbol occupied by data and DMRS.
The method according to claim 6, or the communication device according to claim 6, wherein

The N 1 =N 2 =1, or the N 1 =N 2 =2.
The method according to claim 1, or the communication device according to claim 2, wherein the current mode is a resource hopping mode,

The DMRS in the preset DMRS pattern occupies consecutive M symbols and consecutive K symbols in a resource scheduling unit that is not hopped, wherein the M symbols are not adjacent to the K symbols;

The DMRS in the DMRS pattern corresponding to the current mode occupies consecutive M 1 symbols and consecutive K 1 symbols in the symbols of the first frequency band, and consecutive M 2 symbols and consecutive Ks in the second frequency band. 2 symbols, wherein the M 1 symbols are not adjacent to the K 1 symbols, and the M 2 symbols are not adjacent to the K 2 symbols, M, K, M 1 , K 1 , M 2 and K 2 are integers greater than or equal to 1. The K 2 symbol is the same as the position of the K symbols, or the K 2 symbol positions are preset positions.
A method according to claim 8, or a communication device according to claim 8, characterized in that

The K 1 symbols include a first symbol from the bottom of the first frequency band, a second last symbol, or a third symbol from the last.
A method according to claim 9, or a communication device according to claim 9, characterized in that

The M 1 symbols include a first symbol in a first region of the first frequency band, and the first region includes a symbol occupied by the data and the DMRS.
A method according to claim 9 or 10, or a communication device according to claim 9 or 10, characterized in that

The M 2 symbols include a first symbol in the second frequency band.
A method according to claim 8, or a communication device according to claim 8, characterized in that

M 1 =M, the M 1 symbols are the same as the positions of the M symbols,

The K 1 symbols include a last symbol in the first frequency band,

The M 2 symbol includes a first symbol in the first frequency band,

K 2 =K, the k 2 symbol is the same as the position of the K symbols, or the K 2 symbol positions are preset positions.
A method according to claim 8, or a communication device according to claim 8, characterized in that

M 1 =M, the M 1 symbols are the same as the positions of the M symbols,

The K 1 symbols include a 7th symbol in the entire resource scheduling unit, and the entire resource scheduling unit includes a sum of symbols occupied by the first frequency band and the second frequency band, where the entire resource scheduling unit includes 14 symbols.

The M 2 symbol includes an eighth symbol in the entire resource scheduling unit,

K 2 =K, the K 2 symbol is the same as the position of the K symbols, or the K 2 symbol positions are preset positions.
A method according to claim 8, or a communication device according to claim 8, characterized in that

M 1 =M 2 , K 1 =K 2 , and the M 1 symbols and the position of the K 1 symbols in the first frequency band and the M 2 symbols in the second frequency band and the The position of K 2 symbols is symmetrical.
A method according to claim 14, or a communication device according to claim 14, wherein

The M 2 symbols include a first symbol in the second frequency band.
The method according to any one of claims 8 to 15, or the communication device according to any one of claims 8 to 15, characterized in that

The DMRS in the preset DMRS pattern also occupies consecutive P symbols in one resource scheduling unit that is not hopped, and the P symbols are not adjacent to the M symbols and the K symbols;

The DMRS pattern corresponding to the current mode in a first frequency band occupied by further DMRS symbols of the continuous P 1 of symbols, and the second frequency band in successive symbols P 2, wherein P 1 and the symbol The M 1 symbols and the K 1 symbols are not adjacent, and the P 2 symbols and the M 2 symbols are not adjacent to the K 2 symbols, P, P 1 , P 2 Is an integer greater than or equal to 1.
The method according to claim 1, or the communication device according to claim 2, wherein the current mode is an aggregation mode, the plurality of resource scheduling units are Y, and Y is greater than or equal to 2. Integer

The DMRS in the preset DMRS pattern occupies at least one consecutive symbol in each resource scheduling unit of the Y resource scheduling units,

The DMRS in the DMRS pattern corresponding to the current mode occupies at least one consecutive symbol in each of the first Y 1 resource scheduling units in the Y resource scheduling units, and Y 1 is an integer greater than or equal to 1 and less than Y.
The method according to claim 1, or the communication device according to claim 2, wherein the current mode is an aggregation mode, and the plurality of resource scheduling units are Y.

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

The DMRS in the DMRS pattern corresponding to the current mode occupies the L 1 group symbol in each resource scheduling unit of the Y resource scheduling units, and L 1 is an integer smaller than L, wherein the L 1 group symbols are not adjacent. Each set of symbols in the L 1 set of symbols includes at least one symbol in succession.
The method according to claim 1, or the communication device according to claim 2, wherein the current mode is an aggregation mode, and the plurality of resource scheduling units are Y.

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

The maximum difference between the distances of any two adjacent symbols in the Y*L group symbol occupied by the DMRS in the preset DMRS pattern is R symbols, and the Y*L occupied by the DMRS in the DMRS pattern corresponding to the current mode. The maximum difference between the spacing of any two adjacent symbols in the group symbol is S symbols, S < R.
The method according to any one of claims 1 to 3, wherein the communication device is a network device, the method further comprising:

The communication device sends first indication information to the terminal device, where the first indication information is used by the terminal device to determine a current mode of the resource scheduling unit.
The method according to any one of claims 1 to 3, wherein the communication device is a network device, the method further comprising:

The communication device sends the second indication information to the terminal device, where the second indication information is used to indicate the DMRS pattern corresponding to the current mode.
The method according to any one of claims 1 to 3, wherein the communication device is a terminal device, the method further comprising:

Receiving, by the communications device, first indication information that is 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;

The communication device determines a current mode of the resource scheduling unit, including:

The communication device determines the current mode according to the first indication information.
The method according to any one of claims 1 to 3, wherein the communication device is a terminal device, the method further comprising:

The communication device receiving the network device sends the second indication information, where the second indication information is used to indicate the DMRS pattern corresponding to the current mode.
The communication device according to any one of claims 2 to 3, wherein the communication device is a network device, and the transceiver is further configured to send first indication information to the terminal device, the first The indication information is used by the terminal device to determine a current mode of the resource scheduling unit.
The communication device according to any one of claims 2, 3 to 19, and 24, wherein the communication device is a network device, and the transceiver is further configured to send second indication information to the terminal device, The second indication information is used to indicate a DMRS pattern corresponding to the current mode.
The communication device according to any one of claims 2 to 3, wherein the communication device is a terminal device, and the transceiver is further configured to receive first indication information sent by the network device, where the An indication information is used by the terminal device to determine a current mode of the resource scheduling unit;

The processor is specifically configured to determine the current mode according to the first indication information.
The communication device according to any one of claims 2, 3 to 19, or 26, wherein the communication device is a terminal device, and the transceiver is further configured to receive, by the network device, second indication information, The second indication information is used to indicate a DMRS pattern corresponding to the current mode.
A communication device, comprising:

Processing unit and transceiver unit,

The processing unit is configured to determine a current mode of the 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 one resource scheduling unit is in the first frequency band, and another part symbol is located in the second mode. a frequency band, where the aggregation mode indicates that a plurality of resource scheduling units aggregate transmissions;

The transceiver unit is configured to perform mapping or demapping of the DMRS by using the DMRS pattern corresponding to the current mode, where the symbol position occupied by the DMRS in the DMRS pattern corresponding to the current mode is occupied by the DMRS in the preset DMRS pattern. The symbol positions are different.
A processing device, comprising: a processor and an interface;

The processor is operative to perform the method of any one of claims 1, 3 to 23.
A processing device, comprising: a processor, an interface, and a memory;

A code is stored in the memory, and the processor is configured to execute the code in the memory to perform the method of any one of claims 1, 3 to 23.
A processing apparatus according to claim 30, wherein

The memory is disposed in the processor, or

The memory is set independently of the processor.
A computer readable storage medium, comprising a computer program, when the computer program is run on a computer, causing the computer to perform the method of any one of claims 1, 3 to 23.
A computer program product, wherein the computer program product is executed by a computer such that the computer implements the method of any one of claims 1, 3 to 23.
A communication system comprising:

a first communication device, configured to perform mapping of DMRS according to the method of any one of claims 1, 3 to 23;

A second communication device for performing demapping of the DMRS according to the method of any one of claims 1, 3 to 23.
A method for transmitting a demodulation reference signal DMRS, comprising:

The communication device determines the DMRS pattern corresponding to the frequency hopping mode by using the indication information of the additional DMRS, where the additional DMRS indicates another segment DMRS located after the pre-load DMRS, and the indication information is used to indicate at least one of the following: An additional DMRS, a number of the additional DMRSs, and a location of the additional DMRS, where the frequency hopping mode indicates that a part of symbols in one resource scheduling unit is in the first frequency band, and another part of the symbol is in the second frequency band.

The communication device performs mapping or demapping of the DMRS using the DMRS pattern.
A communication device, comprising:

Processor and transceiver,

The processor is configured to determine, by using indication information of the additional DMRS, a DMRS pattern corresponding to the frequency hopping mode, where the additional DMRS indicates another segment DMRS located after the pre-load DMRS, where the indication information is used to indicate at least one of the following: Whether there is the additional DMRS, the number of the additional DMRSs, and the location of the additional DMRS, where the frequency hopping mode indicates that one of the symbols in one resource scheduling unit is located in the first frequency band, and the other part of the symbol is located in the second frequency band.

The transceiver is configured to perform mapping or demapping of the DMRS using the DMRS pattern.
A method according to claim 35, or a communication device according to claim 36, wherein

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 the first frequency band and a segment of the second frequency band, wherein a segment of the symbol includes at least one consecutive symbol.
A method according to claim 37, or a communication device according to claim 37, characterized in that

A segment of the first frequency band includes a first symbol in a first region of the first frequency band, the first region including a symbol occupied by the data and the DMRS.
A method according to claim 37 or 38, or a communication device according to claim 37 or 38, characterized in that

A segment of the second frequency band includes a first symbol of the second frequency band.
A method according to claim 35, or a communication device according to claim 36, wherein

When the indication information is used to indicate that the additional DMRS exists, the DMRS in the DMRS pattern occupies the number of symbols and the location in the first frequency band, and the number and location of the symbol segments in the occupied second frequency band and the indication The information and the pre-load DMRS indication information indicate the same number of segments and locations.
A method according to claim 35, or a communication device according to claim 36, wherein

When the indication information is used to indicate that the additional DMRS exists,

The DMRS in the DMRS pattern occupies two consecutive symbols in the first frequency band, and two non-contiguous symbols in the second frequency band,

or,

The DMRS in the DMRS pattern occupies two consecutive symbols in the first frequency band and a symbol in the second frequency band.

or,

The DMRS in the DMRS pattern occupies a segment of the first frequency band and two consecutive symbols in the second frequency band,

Wherein each of the two segments of symbols comprises a continuous indication of a symbol, the segment of the symbol comprising at least one symbol in succession.
A method according to claim 40 or 41, or a communication device according to claim 40 or 41, characterized in that

When the DMRS in the DMRS pattern occupies two consecutive symbols in the first frequency band, the next one of the two symbols in the first frequency band includes the last symbol in the first frequency band;

or,

When the DMRS occupies two consecutive symbols in the second frequency band in the DMRS pattern, the previous one of the two frequency symbols in the second frequency band includes the first symbol in the second frequency band.
A communication device, comprising:

Processing unit and transceiver unit,

The processing unit is configured to determine, by using indication information of the additional DMRS, a DMRS pattern corresponding to the frequency hopping mode, where the additional DMRS indicates another segment DMRS located after the pre-load DMRS, and the indication information is used to indicate at least one of the following Whether there is the additional DMRS, the number of the additional DMRSs, and the location of the additional DMRS, where the frequency hopping mode indicates that one of the symbols in one resource scheduling unit is located in the first frequency band, and the other part of the symbol is located in the second frequency band.

The transceiver unit is configured to perform mapping or demapping of the DMRS by using the DMRS pattern.
A processing device, comprising: a processor and an interface;

The processor is operative to perform the method of any one of claims 35, 37 to 42.
A processing device, comprising: a processor, an interface, and a memory;

A code is stored in the memory, and the processor is configured to execute the code in the memory to perform the method of any one of claims 35, 37 to 42.
A processing apparatus according to claim 45, wherein

The memory is disposed in the processor, or

The memory is set independently of the processor.
A computer readable storage medium, comprising a computer program, when the computer program is run on a computer, causing the computer to perform the method of any one of claims 35, 37 to 42.
A computer program product, wherein the computer program product is executed by a computer such that the computer implements the method of any one of claims 35, 37 to 42.
A communication system comprising:

a first communication device, configured to perform mapping of DMRS according to the method of any one of claims 35, 37 to 42;

A second communication device for performing demapping of the DMRS according to the method of any one of claims 35, 37 to 42.
A method for transmitting a demodulation reference signal DMRS, comprising:

The network device determines a DMRS pattern corresponding to the frequency hopping mode; the frequency hopping mode indicates that a part of the symbols in one resource scheduling unit is located in the first frequency band, and another part of the symbol is located in the second frequency band;

The network device performs mapping of the DMRS by using the DMRS pattern;

Transmitting, by the network device, 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: whether the additional DMRS, the number and the additional DMRS are present The location of the additional DMRS is indicated, and the additional DMRS represents other segment DMRSs located after the pre-load DMRS.
The method according to claim 50, wherein the network device uses the same additional DMRS configuration parameters in the frequency hopping mode and the non-frequency hopping mode to determine that the number of DMRS segments in the DMRS pattern is different.
The method of claim 50 wherein:

An additional DMRS is not configured in the additional DMRS configuration parameter. In the DMRS pattern corresponding to the frequency hopping mode, only one segment of the DMRS is included in the first frequency band and the second frequency band.
The method according to claim 50, 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 a segment or Two DMRS.
The method according to claim 53, 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 includes only one segment of the DMRS.
The method of claim 52 or 54, wherein a segment of the DMRS of the second frequency band is located at a first symbol of the second frequency band.
The method according to claim 53, wherein when the first frequency band or the second frequency band meets a DMRS interval requirement, the first frequency band or the second frequency band includes two DMRSs.
The method of claim 56, wherein the second DMRS in the first frequency band or the second frequency band that satisfies the DMRS interval requirement is located at a fourth symbol after the first DMRS.
The method of claim 56 or 57, wherein the first segment of the DMRS of the second frequency band is located at a first symbol of the second frequency band.
The method according to claim 50, wherein when the 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, the communication device determines that the frequency hopping does not occur. ;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 DMRSs.
The method according to any one of claims 55 to 59, wherein the DMRS interval requirement is three symbols between two DMRSs of a frequency band.
A network device, comprising: a processing unit and a sending unit:

a processing unit, configured to determine a demodulation reference signal DMRS pattern corresponding to the frequency hopping mode, where the frequency hopping mode indicates that a part of the symbols in one resource scheduling unit is located in the first frequency band, and another part of the symbol is located in the second frequency band;

The processing unit is further configured to perform mapping of the DMRS by using the DMRS pattern;

a sending unit, configured to send, to the terminal device, an additional DMRS configuration parameter corresponding to the DMRS pattern; the additional DMRS configuration parameter is used to indicate at least one of: whether the additional DMRS exists, the number of the additional DMRS And the location of the additional DMRS; the additional DMRS represents other segment DMRSs located after the pre-load DMRS.
The network device according to claim 61, wherein the processing unit uses the same additional DMRS configuration parameter in the frequency hopping mode and the non-frequency hopping mode to determine that the number of DMRS segments in the DMRS pattern is different.
A network device according to claim 61, wherein

An additional DMRS is not configured in the additional DMRS configuration parameter, and the DMRS pattern corresponding to the frequency hopping mode determined by the processing unit is only one DMRS in the first frequency band and the second frequency band.
The network device according to claim 61, wherein, when the additional DMRS is configured in the additional DMRS configuration parameter, the first frequency band and the first frequency band are in the DMRS pattern corresponding to the frequency hopping mode determined by the processing unit The two bands each have one or two DMRSs.
The network device according to claim 64, 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 includes only one segment of the DMRS.
The network device according to claim 63 or 65, wherein a DMRS of the second frequency band is located at a first symbol of the second frequency band.
The network device according to claim 64, wherein when the first frequency band or the second frequency band meets a DMRS interval requirement, the first frequency band or the second frequency band includes two DMRSs.
The network device according to claim 67, wherein the second DMRS in the first frequency band or the second frequency band that satisfies the DMRS interval requirement is located at a fourth symbol after the first DMRS.
The network device according to claim 67 or 68, wherein the first segment of the DMRS of the second frequency band is located at a first symbol of the second frequency band.
The network device according to claim 61, wherein when the additional DMRS is configured in the additional DMRS configuration parameter, the processing unit determines not to skip when the first frequency band or the second frequency band does not meet the DMRS interval requirement. Frequency; or

When the first frequency band and the second frequency band meet the DMRS interval requirement, the processing unit determines that the first frequency band and the second frequency band each include two DMRSs.
The network device according to any one of claims 65 to 70, wherein the DMRS interval requirement is three symbols between two DMRSs of a frequency band.
A method for transmitting a demodulation reference signal DMRS, comprising:

The terminal device receives an additional demodulation reference signal DMRS configuration parameter; the additional DMRS configuration parameter is used to indicate at least one of: whether there is an additional DMRS, a number of the additional DMRS, and a location of the additional DMRS, the attaching DMRS indicates other segment DMRSs located after the pre-load DMRS;

Determining, by the terminal device, the DMRS pattern corresponding to the frequency hopping mode according to the received additional DMRS configuration parameter; the frequency hopping mode indicates that a part of the symbols in one resource scheduling unit is located in the first frequency band, and another part of the symbol is located in the second frequency band;

The terminal device is configured to perform demapping of the DMRS by using the DMRS pattern.
The method according to claim 72, wherein the terminal device uses the same additional DMRS configuration parameter in the frequency hopping mode and the non-frequency hopping mode to determine that the number of DMRS segments in the DMRS pattern is different.
The method of claim 72, wherein

An additional DMRS is not configured in the additional DMRS configuration parameter. In the DMRS pattern corresponding to the frequency hopping mode, only one segment of the DMRS is included in the first frequency band and the second frequency band.
The method according to claim 72, wherein, in the DMRS pattern corresponding to the frequency hopping mode, the first frequency band and the second frequency band each have a segment or Two DMRS.
The method according to claim 75, 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 includes only one segment of the DMRS.
The terminal device according to claim 74 or 76, wherein a DMRS of the second frequency band is located at a first symbol of the second frequency band.
The method according to claim 75, wherein when the first frequency band or the second frequency band meets a DMRS interval requirement, the first frequency band or the second frequency band includes two DMRSs.
The method of claim 78, wherein the second DMRS in the first frequency band or the second frequency band that satisfies the DMRS interval requirement is located at a fourth symbol after the first DMRS.
The method of claim 78 or 79, wherein the first segment of the DMRS of the second frequency band is located at a first symbol of the second frequency band.
The method according to claim 72, wherein when the 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, the communication device determines that the frequency hopping does not occur. ;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 DMRSs.
The method according to any one of claims 76 to 81, wherein the DMRS interval requirement is three symbols between two DMRSs of a frequency band.
A terminal device, comprising: a processing unit and a receiving unit:

a receiving unit, configured to receive an additional demodulation reference signal DMRS configuration parameter, where the additional DMRS configuration parameter is used to indicate at least one of: whether there is an additional DMRS, a number of the additional DMRS, and a location of the additional DMRS, The additional DMRS represents other segment DMRSs located after the pre-load DMRS;

a processing unit, configured to determine, by using the additional DMRS configuration parameter received by the receiving unit, a DMRS pattern corresponding to a frequency hopping mode; the frequency hopping mode indicates that a part of a symbol in a resource scheduling unit is located in a first frequency band, and another part of the symbol Located in the second frequency band;

The processing unit is further configured to perform demapping of the DMRS by using the DMRS pattern.
The terminal device according to claim 83, wherein the processing unit uses the same additional DMRS configuration parameter in the frequency hopping mode and the non-frequency hopping mode to determine that the number of DMRS segments in the DMRS pattern is different.
A terminal device according to claim 83, characterized in that

An additional DMRS is not configured in the additional DMRS configuration parameter, and the DMRS pattern corresponding to the frequency hopping mode determined by the processing unit is only one DMRS in the first frequency band and the second frequency band.
The terminal device according to claim 83, wherein, when the additional DMRS is configured in the additional DMRS configuration parameter, the first frequency band and the first frequency band are in the DMRS pattern corresponding to the frequency hopping mode determined by the processing unit The two bands each have one or two DMRSs.
The terminal device according to claim 86, 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 includes only one segment of the DMRS.
The terminal device according to claim 85 or 87, wherein a DMRS of the second frequency band is located at a first symbol of the second frequency band.
The terminal device according to claim 86, wherein when the first frequency band or the second frequency band meets a DMRS interval requirement, the first frequency band or the second frequency band includes two DMRSs.
The terminal device according to claim 89, wherein the second DMRS in the first frequency band or the second frequency band that satisfies the DMRS interval requirement is located at the fourth symbol after the first DMRS.
The terminal device according to claim 89 or 90, wherein the first segment of the DMRS of the second frequency band is located at a first symbol of the second frequency band.
The terminal device according to claim 83, wherein when the 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, the processing unit determines not to skip Frequency; or

When the first frequency band and the second frequency band meet the DMRS interval requirement, the processing unit determines that the first frequency band and the second frequency band each include two DMRSs.
The terminal device according to any one of claims 87 to 92, wherein the DMRS interval requirement is three symbols between two DMRSs of a frequency band.
A communication system, comprising: the terminal according to any one of claims 83 to 93, and the network device according to any one of claims 61 to 71.
A processing apparatus, comprising: at least one circuit for performing the method of transmitting a demodulation reference signal DMRS according to any one of claims 50 to 60, or performing the claims The method for transmitting a demodulation reference signal DMRS according to any one of 72 to 82.
A computer readable storage medium, wherein the computer readable storage medium stores instructions that, when executed on a processing component of a computer, cause the processing component to perform claims 50-60 The method for transmitting a demodulation reference signal DMRS according to any one of the preceding claims, or the method for transmitting a demodulation reference signal DMRS according to any one of claims 72 to 82.
A chip, characterized in that the chip comprises programmable logic circuits and/or program instructions, and the method for transmitting the demodulation reference signal DMRS according to any one of claims 50 to 60 when the chip is in operation Or the method of transmitting a demodulation reference signal DMRS according to any one of claims 72 to 82.