CN110890946B

CN110890946B - Transmission method of demodulation reference signal, network side equipment and user equipment

Info

Publication number: CN110890946B
Application number: CN201811042469.6A
Authority: CN
Inventors: 李岩; 王飞
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2018-09-07
Filing date: 2018-09-07
Publication date: 2023-01-17
Anticipated expiration: 2038-09-07
Also published as: CN110890946A

Abstract

The invention provides a transmission method of a demodulation reference signal, network side equipment and user equipment. The method comprises the following steps: determining a configuration mode of an extra DMRS and a preamble DMRS; determining the frequency domain resource position mapped by the additional DMRS and the DMRS sequence of the preposed DMRS by adopting the configuration mode; and carrying out DMRS transmission according to the determined frequency domain resource position. The transmission method is used for providing more orthogonal port numbers by combining and configuring the extra DMRS and the preposed DMRS, so that the problem that the configured port numbers cannot meet the scene requirements of large NOMA overload rate or long code length in the transmission of the DMRS in the prior art is solved.

Description

Transmission method of demodulation reference signal, network side equipment and user equipment

Technical Field

The present invention relates to the field of wireless technologies, and in particular, to a method for transmitting a demodulation reference signal, a network side device, and a user equipment.

Background

When applying Non-Orthogonal Multiple Access (NOMA) technology in mass Machine Type Communication (mtc), also called massive internet of things, the requirement for the number of Orthogonal Demodulation Reference Signal (DMRS) ports is shown in the following table, and it can be seen that as the code length increases, the overload rate increases and the requirement for the number of Orthogonal DMRS ports increases gradually.

Currently, in a New Radio (NR) technology, a pre-DMRS configuration includes a configuration type 1 and a configuration type 2, where the maximum numbers of orthogonal DMRS ports supportable in the NR are:

configuring a maximum of 8 orthogonal DMRS ports of type 1;

configuration type 2 can be configured with 12 orthogonal DMRS ports at maximum.

However, in the prior art, when DMRS transmission is performed, the number of configured ports cannot meet the requirement of a scenario in which the NOMA overload rate is large or the code length is long.

Disclosure of Invention

The invention aims to provide a transmission method of a demodulation reference signal, network side equipment and user equipment, which are used for solving the problem that in the transmission of a DMRS (demodulation reference signal) in the prior art, the number of configured ports cannot meet the requirements of a scene with a large NOMA (non-orthogonal multiple access) overload rate or a long code length.

The embodiment of the invention provides a method for transmitting a demodulation reference signal (DMRS), which is applied to network side equipment, wherein the method comprises the following steps:

determining a configuration mode of an extra DMRS and a preamble DMRS;

determining the frequency domain resource position mapped by the additional DMRS and the DMRS sequence of the preposed DMRS by adopting the configuration mode;

and carrying out DMRS transmission according to the determined frequency domain resource position.

Optionally, in the transmission method, in the step of determining the configuration manners of the additional DMRS and the preamble DMRS, the configuration manners are that the additional DMRS and the preamble DMRS are configured independently, or the additional DMRS and the preamble DMRS are configured with time division-orthogonal cover code TD-OCC.

Optionally, in the transmission method, when the configuration manner is that the additional DMRS and the preamble DMRS are configured separately, a k value of a frequency-domain resource location mapped by DMRS sequences of the additional DMRS and the first type of preamble DMRS is determined as follows:

k＝8n+4k’+△；

the values of k' comprise 0 and 1, the values of N comprise 0,1, 2, 8230, N and delta are positive integers, and when an additional DMRS is configured with a first type of preposed DMRS, the delta is obtained by a preset first parameter configuration table; when three additional DMRSs are configured with one first-type preamble DMRS or two additional DMRSs are configured with two first-type preamble DMRSs, Δ is obtained from a preset third parameter configuration table, wherein the third parameter configuration table is different from the first parameter configuration table.

Optionally, in the transmission method, in the first parameter configuration table and the third parameter configuration table, a Δ value includes 0 and 1.

Optionally, in the transmission method, when the configuration manner is that the additional DMRS and the preamble DMRS are configured separately, a k value of the frequency-domain resource location mapped by the DMRS sequences of the additional DMRS and the preamble DMRS of the second type is determined according to the following manner:

k＝12n+4k’+△

the k' value comprises 0 and 1, N values comprises 0,1, 2, \ 8230, N and N are positive integers, and delta is a positive integer, and is obtained by a preset second parameter configuration table when an additional DMRS is configured with a second type of preposed DMRS; when three additional DMRSs are configured with one second type of preamble DMRS, or two additional DMRSs are configured with two second type of preamble DMRSs, Δ is obtained from a preset fourth parameter configuration table, wherein the fourth parameter configuration table is different from the second parameter configuration table.

Optionally, in the transmission method, in the second parameter configuration table and the fourth parameter configuration table, values of Δ include 0, 2, and 4.

Optionally, in the transmission method, in the step of determining a configuration of the additional DMRS and the preamble DMRS, the configuration may use at least one of:

one additional DMRS and one first type of preamble DMRS are subjected to TD-OCC-2 configuration or independent configuration;

two additional DMRSs are configured independently with a first type of preamble DMRS;

the three additional DMRSs and a first type of preamble DMRS are subjected to TD-OCC-4 configuration or independent configuration;

the two additional DMRSs are TD-OCC-4 configured or independently configured with two preamble DMRSs of the first type.

Optionally, in the transmission method, in the step of determining the configuration of the additional DMRS and the preamble DMRS, the configuration may use at least one of:

one extra DMRS and one second type of preamble DMRS are subjected to TD-OCC-2 configuration or independent configuration;

two additional DMRSs are configured independently with a preamble DMRS of a second type;

the three additional DMRSs and a preposed DMRS of a second type are subjected to TD-OCC-4 configuration or independent configuration;

the two additional DMRSs are TD-OCC-4 configured or independently configured with two preamble DMRSs of a second type.

Optionally, in the transmission method, in the step of performing DMRS transmission, the transmitted DMRS includes a scrambling code sequence identity SCID.

Optionally, the transmission method further includes:

obtaining scrambling code n of SCID configured by high-level parameter scrambling code address ID _SCID ∈{0,1,2,3...N}。

The embodiment of the invention also provides a transmission method of the demodulation reference signal DMRS, which is applied to user equipment, wherein the method comprises the following steps:

acquiring a DMRS sequence transmitted by network side equipment, wherein the DMRS sequence is formed by configuring an extra DMRS and a preposed DMRS;

and determining the position of the frequency domain resource mapped by the transmitted DMRS sequence according to the configuration mode that the network side equipment configures the additional DMRS and the preposed DMRS.

Optionally, in the transmission method, the configuration manner is that the additional DMRS and the preamble DMRS are configured independently, or the additional DMRS and the preamble DMRS are configured with a time division-orthogonal cover code TD-OCC.

k＝8n+4k’+△；

the method comprises the following steps that k' values comprise 0 and 1, N values comprise 0,1, 2, \8230, N and delta are positive integers, and when an extra DMRS is configured with a first type of pre-DMRS, the delta is obtained by a preset first parameter configuration table; when three additional DMRSs are configured with one first-type preamble DMRS or two additional DMRSs are configured with two first-type preamble DMRSs, Δ is obtained from a preset third parameter configuration table, wherein the third parameter configuration table is different from the first parameter configuration table.

Optionally, in the transmission method, when the configuration manner is that the additional DMRS and the preamble DMRS are configured separately, a k value of a frequency-domain resource location mapped by DMRS sequences of the additional DMRS and the preamble DMRS of the second type is determined according to the following manner:

k＝12n+4k’+△

the values of k' comprise 0 and 1, the values of N comprise 0,1, 2, 8230, N and delta are positive integers, and when an additional DMRS is configured with a second type of preposed DMRS, the delta is obtained by a preset second parameter configuration table; when three additional DMRSs are configured with one second type of preamble DMRS, or two additional DMRSs are configured with two second type of preamble DMRSs, Δ is obtained from a preset fourth parameter configuration table, wherein the fourth parameter configuration table is different from the second parameter configuration table.

Optionally, in the transmission method, a value of Δ in the second parameter configuration table and the fourth parameter configuration table includes 0, 2, and 4.

Optionally, the transmission method may further include that the configuration mode adopts at least one of the following:

the three additional DMRSs and a preposed DMRS of a first type are subjected to TD-OCC-4 configuration or independent configuration;

three additional DMRSs and a second type of preamble DMRS are subjected to TD-OCC-4 configuration or independent configuration;

Optionally, in the transmission method, in the step of obtaining the DMRS sequence transmitted by the network side device, the obtained DMRS sequence includes a scrambling code sequence identity SCID.

The embodiment of the present invention further provides a network side device, which includes a processor and a transceiver, where the processor is configured to execute the following processes:

determining a configuration mode of an extra DMRS and a preamble DMRS;

determining the time-frequency resource position mapped by the additional DMRS and the DMRS sequence of the front DMRS by adopting the configuration mode;

Optionally, in the network side device, the configuration manner is that the additional DMRS and the preamble DMRS are configured independently, or the additional DMRS and the preamble DMRS are configured with a time division-orthogonal cover code TD-OCC.

Optionally, in the network side device, when the configuration manner is that the additional DMRS and the preamble DMRS are configured separately, the k value of the frequency-domain resource location mapped by the DMRS sequences of the additional DMRS and the first type of preamble DMRS is determined according to the following manner:

k＝8n+4k’+△；

the values of k' comprise 0 and 1, the values of N comprise 0,1, 2, 8230, N and delta are positive integers, and when an additional DMRS is configured with a first type of preposed DMRS, the delta is obtained by a preset first parameter configuration table; when three additional DMRSs are configured with one first type of preamble DMRS or two additional DMRSs are configured with two first type of preamble DMRSs, Δ is obtained by a preset third parameter configuration table, wherein the third parameter configuration table is different from the first parameter configuration table.

Optionally, in the network-side device, in the first parameter configuration table and the third parameter configuration table, a Δ value includes 0 and 1.

Optionally, in the network side device, when the configuration manner is that the additional DMRS and the preamble DMRS are configured separately, the k value of the frequency-domain resource location mapped by the DMRS sequences of the additional DMRS and the preamble DMRS of the second type is determined according to the following manner:

k＝12n+4k’+△

Optionally, in the network side device, a value of Δ in the second parameter configuration table and the fourth parameter configuration table includes 0, 2, and 4.

Optionally, in the network side device, when the processor determines the configuration of the additional DMRS and the preamble DMRS, the configuration may use at least one of the following:

one additional DMRS and one second type of preamble DMRS are subjected to TD-OCC-2 configuration or independent configuration;

Optionally, in the network-side device, when performing DMRS transmission, the processor includes a scrambling code sequence identity SCID in the transmitted DMRS.

Optionally, the network-side device, wherein the processor is further configured to:

The embodiment of the present invention further provides a user equipment, which includes a processor and a transceiver, wherein the processor is configured to execute the following processes:

and determining the frequency domain resource position mapped by the transmitted DMRS sequence according to the configuration mode of the network side equipment for configuring the additional DMRS and the preposed DMRS.

Optionally, in the user equipment, the configuration manner is that the additional DMRS and the preamble DMRS are configured independently, or the additional DMRS and the preamble DMRS are configured with a time division-orthogonal cover code TD-OCC.

Optionally, in the user equipment, when the configuration manner is that the additional DMRS and the preamble DMRS are configured separately, a k value of the frequency-domain resource location mapped by the DMRS sequences of the additional DMRS and the first type of preamble DMRS is determined according to the following manner:

k＝8n+4k’+△；

Optionally, in the user equipment, a Δ value in the first parameter configuration table and the third parameter configuration table includes 0 and 1.

Optionally, in the user equipment, when the configuration manner is that the additional DMRS and the preamble DMRS are configured separately, the k values of the frequency-domain resource locations mapped by the DMRS sequences of the additional DMRS and the preamble DMRS of the second type are determined according to the following manner:

k＝12n+4k’+△

Optionally, in the user equipment, a Δ value in the second parameter configuration table and the fourth parameter configuration table includes 0, 2, and 4.

Optionally, the user equipment, wherein the group configuration mode adopts at least one of the following:

the two additional DMRSs are TD-OCC-4 configured or independently configured with two second type preamble DMRSs.

Optionally, in the user equipment, the combined DMRS sequence acquired by the processor includes a scrambling sequence identity SCID.

The embodiment of the invention also provides communication equipment, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor; wherein the processor, when executing the program, implements the method for transmitting the DMRS according to any one of the above.

An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the program, when executed by a processor, implements the steps in the method for transmitting a DMRS as described in any one of the above.

At least one of the above technical solutions of the specific embodiment of the present invention has the following beneficial effects:

the method for transmitting the demodulation reference signal DMRS is used for providing more orthogonal ports by combining and configuring the extra DMRS and the preposed DMRS, so that the problem that the configured ports cannot meet the scene requirement of large NOMA overload rate or long code length in the transmission of the DMRS in the prior art is solved.

Drawings

Fig. 1 is a schematic architecture diagram illustrating a possible application scenario of a transmission method for a demodulation reference signal DMRS according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating a method for transmitting a DMRS according to a first embodiment of the present invention;

fig. 3 is a schematic diagram illustrating that a first type of DMRS sequence is mapped to a frequency domain resource location by using the transmission method according to the embodiment of the present invention;

fig. 4 is a schematic diagram illustrating that a DMRS sequence of a second type is mapped to a frequency-domain resource location by using the transmission method according to the embodiment of the present invention;

fig. 5 is a flowchart illustrating a method for transmitting a DMRS according to a second embodiment of the present invention;

fig. 6 shows a first structural diagram of a network device according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a first structure of a ue according to an embodiment of the present invention;

fig. 8 is a schematic diagram illustrating a second structure of a network-side device according to an embodiment of the present invention;

fig. 9 is a schematic diagram of a second structure of the ue according to the embodiment of the present invention.

Detailed Description

To make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

The transmission method of the demodulation reference signal DMRS according to the embodiment of the present invention can be applied to various communication systems, for example: global System for Mobile communications (GSM) systems, code Division Multiple Access (CDMA) systems, wideband Code Division Multiple Access (WCDMA) systems, general Packet Radio Service (GPRS), long Term Evolution (Long Term Evolution, LTE) systems, universal Mobile Telecommunications System (UMTS) and other current communication systems, and may be particularly applied to the fifth generation Mobile communication technology (5G) System in the future.

In particular, the technical solution of the embodiment of the present invention may be applied to various communication systems based on a non-orthogonal Multiple Access technology, such as a Sparse Code Multiple Access (SCMA) system, a Low Density Signature (LDS) system, and the like, where the SCMA system and the LDS system may also be referred to as other names in the communication field; further, the technical solution of the embodiment of the present invention may be applied to a Multi-Carrier transmission system using a non-Orthogonal multiple access technology, for example, a non-Orthogonal multiple access technology Orthogonal Frequency Division Multiplexing (OFDM for short), a Filter Bank Multi-Carrier (FBMC for short), a general Frequency Division Multiplexing (GFDM for short), a Filtered Orthogonal Frequency Division Multiplexing (Filtered-OFDM for short), and the like.

A User Equipment (UE) in an embodiment of the present invention may be an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a User terminal, a wireless communication device, a User agent, or a User Equipment. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, a user equipment in a future 5G Network or a user equipment in a Public Land Mobile Network (PLMN) for future evolution, and the like, and the embodiments of the present invention are not limited thereto. In addition, here, the network side device 110 may be a base station.

Fig. 1 shows a schematic diagram of a possible application scenario of a transmission method for a demodulation reference signal DMRS according to an embodiment of the present invention. As shown in fig. 1, a wireless communication system 100 adopting the embodiment of the present invention includes a network side device 110 and at least one user equipment 120 in the coverage of the network side device 110. The network device 110 may determine a DMRS sequence, and transmit a DMRS to the user equipment according to a resource corresponding to the DMRS sequence, and the user equipment 120 may transmit and receive data at a designated antenna port according to the DMRS transmitted by the network device.

The method for transmitting the DMRS according to the embodiment of the present invention is described in detail below with reference to fig. 2.

The method for transmitting a DMRS according to the first embodiment of the present invention is applied to a network device, and as shown in fig. 2, the method includes:

s210, determining a configuration mode of an extra DMRS and a preposed DMRS;

s220, determining the frequency domain resource position mapped by the additional DMRS and the DMRS sequence of the front DMRS in the configuration mode;

and S230, carrying out DMRS transmission according to the determined frequency domain resource position.

In the DMRS transmission method according to the above embodiment, the extra DMRS and the pre-DMRS are combined and configured to provide more orthogonal port numbers, so that a problem that in the transmission of the DMRS in the prior art, the configured port numbers cannot meet a scene requirement that the NOMA overload rate is large or the code length is long is solved.

In the embodiment of the invention, the extra DMRS and the front DMRS can be distinguished according to time domain positions, wherein when two DMRSs which are positioned at different time domain positions exist in a Slot, the DMRS which is positioned in the front of the time domain position in the Slot is the front DMRS, and the DMRS which is positioned in the back of the time domain position in the Slot is the extra DMRS; when only one DMRS exists in the Slot, the DMRS is a preamble DMRS.

In this embodiment of the present invention, in step S210, in the step of determining the configuration manners of the extra DMRS and the pre-DMRS, the configuration manners are that the extra DMRS and the pre-DMRS are configured independently, or the extra DMRS and the pre-DMRS are configured by Time Division-Orthogonal cover code (TD-OCC).

Based on the above manner, when the configuration mode that the additional DMRS and the preamble DMRS are combined and configured is adopted, and the additional DMRS and the preamble DMRS are configured independently, the combined and configured additional DMRS and the preamble DMRS form DMRSs of multiple symbols, so that more orthogonal ports can be provided; when the additional DMRS and the preamble DMRS are used for TD-OCC configuration, more orthogonal port numbers can be provided by performing the TD-OCC configuration.

Specific implementations of the different configurations described above will be described in detail below.

In the first embodiment of the method for transmitting a DMRS according to the first embodiment of the present invention, the additional DMRS and the preamble DMRS are configured independently, and the additional DMRS is configured in combination with the preamble DMRS of the first type.

Specifically, as shown in fig. 3, in the first type of preamble DMRS:

DMRSs of each port on 1 symbol in 1 Physical Resource Block (PRB) occupy 6RE resources;

the orthogonal port number of a preposed DMRS symbol is formed by the following steps: comb 2+2 Cyclic Shift (CS), providing 4 orthogonal antenna ports at maximum;

the orthogonal port number of the two preposed DMRS symbols is formed by the following steps: comb 2+ Td-OCC ({ 1} and { 1-1 }) providing a maximum of 8 orthogonal antenna ports.

Further, in the first type of preamble DMRS:

on 1 symbol in 1 PRB, mapping a first antenna port to the 0 th, 2 nd, 4 th, 6 th, 8 th and 10 th frequency domain positions corresponding to the DMRS sequence;

on 1 symbol in 1 PRB, the second antenna port is mapped to the 1 st, 3 rd, 5 th, 7 th, 9 th and 11 th frequency domain positions corresponding to the DMRS sequence;

on 1 symbol in 1 PRB, obtaining DMRS sequences corresponding to a third antenna port and a fourth antenna port through CS;

on 2 symbols within 1 PRB, corresponding DMRS sequences for the fifth to eighth antenna ports are obtained through TD-OCC.

In a first implementation manner of the method for transmitting the DMRS according to the embodiment of the present invention, the additional DMRS and the first type of preamble DMRS are configured, and a k value of a frequency domain resource location to which DMRS sequences of the additional DMRS and the first type of preamble DMRS are mapped is determined according to the following manner:

k＝8n+4k’+△；

In this embodiment of the present invention, the first parameter configuration table may be the following table 1:

TABLE 1

The third parameter configuration table may be table 3 as follows:

TABLE 3

According to the above, in the first parameter configuration table and the third parameter configuration table, the Δ values include 0 and 1.

In addition, in determining a frequency domain resource location to which the additional DMRS is mapped with the DMRS sequence of the first type of preamble DMRS, the frequency domain resource location may be determined according to the following formula:

wherein the content of the first and second substances,

is as follows

Frequency domain resource positions mapped by the DMRS sequences corresponding to the antenna ports;

in addition, as shown in the first parameter configuration table, when one additional DMRS is configured with one first type of preamble DMRS, the values of k' in the above formula include 0 and 1; values of l' include 0 and 1; corresponding to w _f (k') includes values of +1 and-1,w _t (l') includes values of +1 and-1; the values of Δ include 0 and 1, and specifically, the values of the parameters and the corresponding relationship therebetween may be determined according to table 1.

As shown in the third parameter configuration table, when three additional DMRSs are configured with one first type of preamble DMRSs, or two additional DMRSs are configured with two first type of preamble DMRSs, values of k' in the above formula include 0 and 1; values of l' include 0,1, 2 and 3; corresponding to w _f (k') includes values of +1 and-1,w _t (l') includes values of +1 and-1; the values of Δ include 0 and 1, and specifically, the values of the parameters and the corresponding relationship therebetween may be determined according to table 1.

Further, the above

In the step (1), the first step,

j =0, 1., v-1, where the value of l' can be determined according to table 1 above, taking the value 0 or 1;

is the average of l; v is a positive integer.

In addition, r (2n + k') is a base sequence, such as a ZC sequence or a PN sequence.

It is to be understood that, according to the above first parameter configuration table and the third parameter configuration table, when the additional DMRS is configured independently of the first type of preamble DMRS, the first DMRS is determined

When the frequency domain resource position mapped by the DMRS sequence corresponding to each antenna port is located, the frequency domain resource position mapped by the corresponding combined DMRS sequence can be determined by calculating values of corresponding parameters in the tables according to table 1 or table 3.

When the k value of the time-frequency resource position mapped by the DMRS sequence is determined, k' takes the values of 0 and 1, N takes the values of 0,1, 2, \8230, N and N are positive integers, delta takes the value of a first parameter configuration table or a third parameter configuration table, and the obtained values are the k values of the frequency-frequency resource position mapped by the DMRS sequence.

In the above manner, when one additional DMRS is configured independently of one first type of preamble DMRS, a maximum number of 8 orthogonal ports can be provided; when two additional DMRSs are configured independently with one first type of preamble DMRS, a maximum of 12 orthogonal port numbers can be provided; when three additional DMRSs are configured independently with one first type of preamble DMRS, a maximum of 16 orthogonal ports can be provided; when two additional DMRSs are configured independently of two first type preamble DMRSs, a maximum number of 16 orthogonal ports can be provided. Compared with the prior art that one first type of preamble DMRS can provide 4 orthogonal ports at most, and two first type of preamble DMRSs can provide 8 orthogonal ports at most, more orthogonal ports can be provided by adopting the manner that the additional DMRS and the first type of preamble DMRS are independently configured.

In the second embodiment of the method for transmitting a DMRS according to the first embodiment of the present invention, the additional DMRS and the preamble DMRS are configured independently and separately, and the additional DMRS and the preamble DMRS of the second type are configured.

Specifically, as shown in fig. 4, in the second type of preamble DMRS:

DMRSs of each port on 1 symbol in 1 Physical Resource Block (PRB) occupy 4RE resources;

the orthogonal port number of a preposed DMRS symbol is formed by the following steps: the adjacent REs in the Frequency domain carry out 2-Frequency Division-Orthogonal cover codes (FD-OCC), and maximum 6 Orthogonal antenna ports are provided;

the orthogonal port number of the two preposed DMRS symbols is formed by the following steps: the frequency domain neighboring REs are subjected to 2-FD-OCC, the time domain is subjected to TD-OCC ({ 1} and { 1-1 }), and a maximum of 12 orthogonal antenna ports are provided.

Further, in the second type of preamble DMRS:

on 1 symbol in 1 PRB, a first antenna port is mapped to the 0 th, 1 st, 6 th and 7 th frequency domain positions corresponding to the DMRS sequence;

on 1 symbol in 1 PRB, a second antenna port is mapped to the 2 nd, 3 rd, 8 th and 9 th frequency domain positions corresponding to the DMRS sequence;

on 1 symbol in 1 PRB, a third antenna port is mapped to the 4 th, 5 th, 10 th and 11 th frequency domain positions corresponding to the DMRS sequence;

on 1 symbol in 1 PRB, obtaining DMRS sequences corresponding to a fourth antenna port to a sixth antenna port through FD-OCC;

on 2 symbols within 1 PRB, corresponding DMRS sequences for the seventh to twelfth antenna ports are obtained through TD-OCC.

In a second implementation manner of the method for transmitting DMRS according to the embodiment of the present invention, when the additional DMRS and the second type of pre-DMRS are configured independently, a k value of a frequency domain resource location to which DMRS sequences of the additional DMRS and the first type of pre-DMRS are mapped is determined according to the following manner:

k＝12n+4k’+△

In this embodiment of the present invention, the second parameter configuration table may be the following table 2:

TABLE 2

The fourth parameter configuration table may be the following table 4:

TABLE 4

According to the above, in the second parameter configuration table and the fourth parameter configuration table, the Δ values include 0, 2, and 4.

In addition, in determining a frequency domain resource location to which the additional DMRS is mapped with the DMRS sequence of the second type of preamble DMRS, the frequency domain resource location may be determined according to the following formula:

wherein, the first and the second end of the pipe are connected with each other,

is a first

Time frequency resource positions mapped by the DMRS sequences corresponding to the antenna ports;

in addition, as shown in the second parameter configuration table, when one additional DMRS is independently configured with one preamble DMRS of the second typeThe value of k' in the above formula includes 0 and 1; values of l' include 0 and 1; corresponding w _f (k') includes values of +1 and-1,w _t (l') includes values of +1 and-1; the values of Δ include 0, 2, and 4, and the values of the parameters and the corresponding relationship therebetween may be determined according to table 2.

As shown in the fourth parameter configuration table, when three additional DMRSs are configured with one second type of preamble DMRS, or two additional DMRSs are configured with two second type of preamble DMRSs, values of k' in the above formula include 0 and 1; values of l' include 0,1, 2 and 3; corresponding w _f (k') includes values of +1 and-1,w _t (l') includes values of +1 and-1; the values of Δ include 0, 2, and 4, and specifically, the values of the above parameters and the corresponding relationship therebetween may be determined according to table 4.

Further, the above

In the step (1), the first step,

is the average of l; v is a positive integer.

It is to be understood that, according to the second parameter configuration table and the fourth parameter configuration table above, when the additional DMRS is configured independently of the preamble DMRS of the second type, the second DMRS is determined

When the frequency domain resource position mapped by the combined DMRS sequence corresponding to each antenna port is determined, the frequency domain resource position mapped by the corresponding DMRS sequence can be determined by respectively taking the values of the corresponding parameters in the table for calculation according to the table 2 or the table 4.

When the k value of the position of the frequency domain resource mapped by the DMRS sequence is determined, k' takes the values of 0 and 1, N takes the values of 0,1, 2, \8230, N and N are positive integers, delta takes the value of a second parameter configuration table or a fourth parameter configuration table, and the obtained values are the k values of the position of the frequency domain resource mapped by the DMRS sequence.

In the above manner, when one additional DMRS is configured independently of one preamble DMRS of the second type, a maximum number of 12 orthogonal ports can be provided; when two additional DMRSs are configured independently with one preamble DMRS of a second type, a maximum number of 18 orthogonal ports can be provided; when three additional DMRSs are configured independently of one second type of preamble DMRS, a maximum number of 24 orthogonal ports can be provided; when two additional DMRSs are configured independently of two preamble DMRSs of the second type, a maximum number of 24 orthogonal ports can be provided. Compared with the prior art that one second type of preamble DMRS can provide 6 maximum orthogonal ports, and two second type of preamble DMRSs can provide 12 maximum orthogonal ports, more orthogonal ports can be provided by adopting the above manner of independent configuration of the additional DMRS and the second type of preamble DMRS.

In the third implementation manner of the method for transmitting a DMRS according to the first embodiment of the present invention, step S210 is performed, and in the step of determining a configuration manner of the additional DMRS and the preamble DMRS, the configuration manner is TD-OCC configuration for the additional DMRS and the preamble DMRS.

Specifically, in step S210, the configuration manner of TD-OCC configuration between the additional DMRS and the preamble DMRS may include at least one of the following:

one extra DMRS and one first type of preposed DMRS are subjected to TD-OCC-2 configuration, and the maximum number of 8 orthogonal ports can be provided;

three additional DMRSs and a first type of preamble DMRS are subjected to TD-OCC-4 configuration, and the maximum number of 16 orthogonal ports can be provided; the two additional DMRSs and the two first type of preamble DMRSs are subjected to TD-OCC-4 configuration, and the maximum number of 16 orthogonal ports can be provided;

one extra DMRS and one preposed DMRS of a second type are subjected to TD-OCC-2 configuration, and the maximum number of 12 orthogonal ports can be provided;

three additional DMRSs and a second type of preamble DMRS are subjected to TD-OCC-4 configuration, and the maximum number of 24 orthogonal antenna ports can be provided;

the two additional DMRSs are TD-OCC-4 configured with two preamble DMRSs of the second type, which can provide a maximum number of 24 orthogonal antenna ports.

Therefore, according to the configuration mode, when the extra DMRS and the preposed DMRS are subjected to TD-OCC configuration, more orthogonal port numbers can be provided by performing the TD-OCC configuration, and therefore the problem that the configured port numbers cannot meet the scene requirements of large NOMA overload rate or long code length in the transmission of the DMRS in the prior art is solved.

According to the above, in the method for transmitting DMRS according to the embodiment of the present invention, in step 210, in the step of determining the configuration of the additional DMRS and the preamble DMRS, the configuration is at least one of the following:

the two additional DMRSs and the two first type of preamble DMRSs are subjected to TD-OCC-4 configuration or independent configuration;

the two additional DMRSs are TD-OCC-4 configured or independently configured with two preamble DMRSs of a second type. In step S230, optionally, the DMRS that is transmitted includes a Scrambling Identity (SCID) sequence Identity.

Optionally, the transmission method may further include:

Based on the mode, according to the scrambling code of the SCID configured by the higher-level parameter scrambling code address ID, the corresponding SCID can be written in the transmitted DMRS, and the number of quasi-orthogonal ports of the DMRS can be increased by increasing the scrambling code of the SCID.

In addition, optionally, the method for transmitting the DMRS according to the embodiment of the present invention may further include:

according to the configuration of the high-level parameter or the Downlink Control Information (DCI), the configuration mode in step S220 is determined, so as to determine the time-frequency resource position where the additional DMRS and the pre-DMRS are combined to form the combined DMRS sequence mapping, and perform DMRS transmission.

According to the above description of the embodiments of the configuration method for configuring the combination of the additional DMRS and the pre-DMRS in the DMRS transmission method according to the embodiments of the present invention, those skilled in the art should understand that the specific manner for determining the time-frequency resource location of the combination of the additional DMRS and the pre-DMRS to form the combined DMRS sequence mapping by using each configuration method, and the specific manner and procedure for performing DMRS transmission according to the determined time-frequency resource location are not described in detail herein.

The method for transmitting a DMRS according to the second embodiment of the present invention is applied to a user equipment, and as shown in fig. 5, the method includes:

s510, acquiring a DMRS sequence transmitted by network side equipment, wherein the DMRS sequence is formed by configuring an extra DMRS and a preposed DMRS;

and S520, determining the frequency domain resource position mapped by the transmitted DMRS sequence according to the configuration mode of the network side equipment for configuring the additional DMRS and the preposed DMRS.

According to the DMRS transmission method, the extra DMRS and the preposed DMRS are configured through the network side equipment, and more orthogonal port numbers can be provided, so that the problem that the configured port numbers cannot meet the scene requirements of large NOMA overload rate or long code length in the transmission of the DMRS in the prior art is solved.

In the method for transmitting the DMRS according to the embodiment of the present invention, the network side device configures the additional DMRS and the preamble DMRS independently, or configures the time division-orthogonal cover code TD-OCC for the additional DMRS and the preamble DMRS.

In one implementation manner of the method for transmitting the DMRS according to the second embodiment of the present invention, the configuration manners are that the additional DMRS and the preamble DMRS are configured independently, and when the additional DMRS and the first type of preamble DMRS are configured, a k value of a frequency-domain resource location mapped by DMRS sequences of the additional DMRS and the first type of preamble DMRS is determined according to the following manner:

k＝8n+4k’+△；

In this embodiment of the present invention, the first parameter configuration table may be as shown in table 1 above, and the third parameter configuration table may be as shown in table 3 above.

In addition, in step S520, when determining a frequency domain resource location to which the additional DMRS and the DMRS sequence of the first-type preamble DMRS are mapped, the frequency domain resource location may be determined according to the following formula:

wherein the content of the first and second substances,

is a first

in addition, as shown in the first parameter configuration table, when one additional DMRS is configured with one preamble DMRS of the first type, the value of k' in the above formula includes 0 and 1; values of l' include 0 and 1; corresponding w _f (k') includes values of +1 and-1,w _t (l') includes values of +1 and-1; the values of Δ include 0 and 1, and specifically, the values of the above parameters and the corresponding relationship therebetween may be determined according to table 1.

As shown in the third parameter configuration table, when three additional DMRSs are configured with one first type of preamble DMRS, or two additional DMRSs are configured with two first type of preamble DMRSs, values of k' in the above formula include 0 and 1; values of l' include 0,1, 2 and 3; corresponding to w _f (k') includes values of +1 and-1,w _t (l') includes values of +1 and-1; the values of Δ include 0 and 1, and specifically, the values of the above parameters and the corresponding relationship therebetween may be determined according to table 1.

Further, the above

In the step (1), the first step,

is the average of l; and upsilon is a positive integer.

It is to be understood that, according to the above first and third parameter configuration tables, when the additional DMRS is independently configured with the first type of preamble DMRS to form a combined DMRS sequence, the determination is made

Combined DMRS corresponding to antenna portsWhen the frequency domain resource position mapped by the sequence is determined, according to the above table 1 or table 3, the values of the corresponding parameters in the table are respectively taken for calculation, that is, the frequency domain resource position mapped by the corresponding DMRS sequence can be determined.

When a k value of the time-frequency resource position mapped by the DMRS sequence is determined, k' respectively takes a value of 0,1, 2, \ 8230, N and N are positive integers, delta takes a value by the first parameter configuration table or the third parameter configuration table, and a plurality of obtained values are the k values of the frequency-frequency resource position mapped by the combined DMRS sequence.

In another implementation manner of the method for transmitting a DMRS according to the second embodiment of the present invention, the additional DMRS and the preamble DMRS are configured independently, and when the additional DMRS and the preamble DMRS of the second type are configured, a k value of a frequency-domain resource location mapped by DMRS sequences of the additional DMRS and the preamble DMRS of the first type is determined according to the following manner:

k＝12n+4k’+△

In this embodiment of the present invention, the second parameter configuration table may be as shown in table 2 above, and the fourth parameter configuration table may be as shown in table 4 above.

wherein the content of the first and second substances,

is a first

in addition, as shown in the second parameter configuration table, when an additional DMRS is configured independently of a preamble DMRS of a second type, the value of k' in the above formula includes 0 and 1; values of l' include 0 and 1; corresponding to w _f (k') includes values of +1 and-1,w _t (l') includes values of +1 and-1; the values of Δ include 0, 2, and 4, and specifically, the values of the above parameters and the corresponding relationship therebetween may be determined according to table 2.

As shown in the fourth parameter configuration table, when three additional DMRSs are configured with one second type of preamble DMRS, or two additional DMRSs are configured with two second type of preamble DMRSs, values of k' in the above formula include 0 and 1; values of l' include 0,1, 2 and 3; corresponding to w _f (k') includes values of +1 and-1,w _t (l') includes values of +1 and-1; the values of Δ include 0, 2, and 4, and specifically, the values of the above parameters and the corresponding relationship therebetween may be determined according to table 4.

Further, the above

In (1),

j =0, 1.. Times.u-1, where the value of l' can be determined from table 1 above, taking the value 0 or 1;

is the average of l; and upsilon is a positive integer.

It is understood that the following are in accordance withWhen the additional DMRS and the preamble DMRS of the second type are configured independently, the second parameter configuration table and the fourth parameter configuration table are used for determining the second type

When the frequency domain resource position mapped by the DMRS sequence corresponding to each antenna port is determined, the frequency domain resource position mapped by the corresponding DMRS sequence can be determined by calculating values of corresponding parameters in the tables according to table 2 or table 4.

When the k value of the time-frequency resource position mapped by the DMRS sequence is determined, k' takes the values of 0 and 1, N takes the values of 0,1, 2, \8230, N and N are positive integers, delta takes the value of a second parameter configuration table or a fourth parameter configuration table, and the obtained values are the k values of the frequency-frequency resource position mapped by the combined DMRS sequence.

In another implementation manner of the method for transmitting DMRS according to the second embodiment of the present invention, the configuration mode that determines that the additional DMRS is configured in combination with the preamble DMRS is TD-OCC configuration for the additional DMRS and the preamble DMRS.

Specifically, the configuration manner of the TD-OCC operation performed by the additional DMRS and the preamble DMRS may include at least one of the following:

three additional DMRSs and a first type of preposed DMRS are subjected to TD-OCC-4 configuration, and the maximum number of 16 orthogonal ports can be provided; the two additional DMRSs and the two first type of preposed DMRSs are subjected to TD-OCC-4 configuration, and the maximum number of 16 orthogonal ports can be provided;

three additional DMRSs and a second type of preposed DMRS are subjected to TD-OCC-4 configuration, and the maximum number of 24 orthogonal antenna ports can be provided;

two additional DMRSs are TD-OCC-4 configured with two preamble DMRSs of the second type, which can provide a maximum number of 24 orthogonal antenna ports.

According to the above, in step S510, the configuration manner adopts at least one of the following:

one extra DMRS is combined with one preposed DMRS of the first type to perform TD-OCC-2 operation or independent configuration;

one extra DMRS and one first type of preamble DMRS are subjected to TD-OCC-2 configuration or independent configuration;

Optionally, in step S510, in the step of obtaining the DMRS sequence transmitted by the network side device, the obtained DMRS sequence includes a scrambling code sequence identity SCID.

Compared with the DMRS transmission in the prior art, the DMRS transmission method provided by the embodiment of the invention has the advantages that the number of ports is increased, so that the method can meet the scene requirement of higher NOMA overload rate or longer code length.

A third embodiment of the present invention provides a network-side device, as shown in fig. 6, where the network-side device 600 includes a processor 610 and a transceiver 620, where the processor 610 is configured to perform the following processes:

determining a configuration mode of an extra DMRS and a preamble DMRS;

Optionally, the configuration manner is that the additional DMRS and the preamble DMRS are configured independently, or the additional DMRS and the preamble DMRS are configured with a time division-orthogonal cover code TD-OCC.

Optionally, when the additional DMRS and the preamble DMRS are configured independently and the additional DMRS is configured in combination with the first type of preamble DMRS, determining a k value of the frequency-domain resource location mapped by the DMRS sequences of the additional DMRS and the first type of preamble DMRS according to the following manner:

k＝8n+4k’+△；

the method comprises the following steps that k' values comprise 0 and 1, N values comprise 0,1, 2, \8230, N and delta are positive integers, and when an extra DMRS is configured with a first type of pre-DMRS, the delta is obtained by a preset first parameter configuration table; when three additional DMRSs are configured with one first type of preamble DMRS or two additional DMRSs are configured with two first type of preamble DMRSs, Δ is obtained by a preset third parameter configuration table, wherein the third parameter configuration table is different from the first parameter configuration table.

Optionally, in the first parameter configuration table and the third parameter configuration table, a Δ value includes 0 and 1.

Optionally, when the configuration manner is that the additional DMRS and the preamble DMRS are configured independently, a k value of a frequency-domain resource location to which the DMRS sequences of the additional DMRS and the preamble DMRS of the second type are mapped is determined according to the following manner:

k＝12n+4k’+△

Optionally, in the second parameter configuration table and the fourth parameter configuration table, the Δ values include 0, 2, and 4.

Optionally, when the processor determines the configuration of the additional DMRS and the preamble DMRS, the configuration may use at least one of the following:

two additional DMRSs are configured independently with a preamble DMRS of a first type;

the two additional DMRSs are TD-OCC-4 configured or independently configured with two preamble DMRSs of the first type. Optionally, when the processor 610 determines a configuration in which the additional DMRS is configured in combination with the preamble DMRS, the configuration may employ at least one of the following:

the two additional DMRSs are TD-OCC-4 configured or independently configured with two preamble DMRSs of a second type. Optionally, the processor 610 includes a scrambling code sequence identity SCID in the DMRS transmitted when the DMRS is transmitted.

Optionally, the processor 610 is further configured to:

A fourth embodiment of the present invention provides a user equipment, as shown in fig. 7, the user equipment 700 includes a processor 710 and a transceiver 720, where the processor 710 is configured to execute the following processes: acquiring a DMRS sequence transmitted by network side equipment, wherein the DMRS sequence is formed by configuring an extra DMRS and a preposed DMRS;

and determining the position of the frequency domain resource mapped by the transmitted DMRS sequence according to the configuration mode that the network side equipment configures the additional DMRS and the preposed DMRS. Optionally, in the user equipment, the configuration manner is that the additional DMRS and the preamble DMRS are configured independently, or the additional DMRS and the preamble DMRS are configured with a time division-orthogonal cover code TD-OCC.

k＝8n+4k’+△；

Optionally, in the user equipment, in the first parameter configuration table and the third parameter configuration table, a Δ value includes 0 and 1.

Optionally, in the user equipment, when the configuration manner is that the additional DMRS and the preamble DMRS are configured separately, a k value of a frequency-domain resource location mapped by DMRS sequences of the additional DMRS and the preamble DMRS of the second type is determined according to the following manner:

k＝12n+4k’+△；

the k' value comprises 0 and 1, N values comprises 0,1, 2, \ 8230, N and N are positive integers, and delta is a positive integer, and is obtained by a preset second parameter configuration table when an additional DMRS is configured with a second type of preposed DMRS; when three additional DMRSs are configured with one second type of preamble DMRS or two additional DMRSs are configured with two second type of preamble DMRSs, Δ is obtained by a preset fourth parameter configuration table, wherein the fourth parameter configuration table is different from the second parameter configuration table.

Optionally, in the user equipment, in the second parameter configuration table and the fourth parameter configuration table, a Δ value includes 0, 2, and 4.

Optionally, the user equipment, wherein,

the group configuration mode adopts at least one of the following modes:

Optionally, in the user equipment, the combined DMRS sequence acquired by the processor 710 includes a scrambling sequence identity SCID. An embodiment of the present invention further provides a communication device, where the communication device may be a network-side device, as shown in fig. 8, the network-side device includes a memory 810, a processor 820, and a computer program stored in the memory 810 and executable on the processor 820. As shown in fig. 8, the network side device further includes a transceiver 830 and a bus interface 840.

Wherein, the processor 820 is used for reading the program in the memory 810;

a transceiver 830 for receiving and transmitting data under control of the processor.

In addition, bus interface 840 may include any number of interconnected buses and bridges, with various circuits representing one or more processors, represented by processor 820, and memory, represented by memory, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 830 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 820 is responsible for managing the bus architecture and general processing, and the memory may store data used by the processor in performing operations.

Specifically, the processor 820 is configured to:

determining a configuration mode of an extra DMRS and a preamble DMRS;

In addition, the processor 820 adopts the manner in the first embodiment described above when configuring the additional DMRS in combination with the preamble DMRS, and is not described in detail here.

In this embodiment of the present invention, the communication device may be a user equipment, as shown in fig. 9, and includes a memory 920, a processor 910, and a computer program stored in the memory 920 and executable on the processor 910; the processor 910 implements the closed loop power control method described above when executing a program. In addition, the user equipment further comprises a transceiver 930.

The processor 910 is specifically configured to:

acquiring a DMRS sequence transmitted by network side equipment, wherein the DMRS sequence is formed by configuring an extra DMRS and a preamble DMRS;

Specifically, when determining the time-frequency resource location of the DMRS according to a manner in which the network-side device configures the additional DMRS in combination with the pre-DMRS, the processor 910 specifically adopts the manner in the second embodiment, which is not described in detail herein.

In addition, the user equipment further includes a user interface 940 connected to the bus interface providing the interface. In FIG. 9, the bus architecture may include any number of interconnected buses and bridges, with various circuits representing one or more processors, in particular processor 910, and memory, in particular memory 920. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The transceiver 930 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The processor 910 is responsible for managing the bus architecture and general processing, and the memory 920 may store data used by the processor in performing operations.

The processor 910 is responsible for managing the bus architecture and general processing, and the memory 920 may store data used by the processor in performing operations.

In addition, a computer-readable storage medium is provided, on which a computer program is stored, wherein the program, when executed by a processor, implements the steps in the method for transmitting the DMRS as described in any one of the above.

Specifically, the computer-readable storage medium is applied to a network side device or a user equipment, and when the computer-readable storage medium is applied to the network side device or the user equipment, the execution steps in the transmission method for the DMRS corresponding to the network side device or the user equipment are described in detail above, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the transceiving method according to various embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a portable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other media capable of storing program codes.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

1. A transmission method of a demodulation reference signal (DMRS) is applied to network side equipment, and is characterized by comprising the following steps:

determining a configuration mode of an extra DMRS and a preamble DMRS; the configuration mode is that the extra DMRS and the preposed DMRS are configured independently, or the extra DMRS and the preposed DMRS are configured with time division-orthogonal cover codes TD-OCC;

carrying out DMRS transmission according to the determined frequency domain resource position; when the configuration mode is that the additional DMRS and the preamble DMRS are configured independently, the k values of the frequency domain resource positions mapped by the DMRS sequences of the additional DMRS and the first type of preamble DMRS are determined according to the following mode:

k＝8n+4k’+Δ；

the value of k' comprises 0 and 1, the value of N comprises 0,1, 2, 8230, N and delta are positive integers, and when one additional DMRS is configured with one preposed DMRS of a first type, the delta is obtained by a preset first parameter configuration table; when three additional DMRSs are configured with one first-type preamble DMRS or two additional DMRSs are configured with two first-type preamble DMRSs, delta is obtained by a preset third parameter configuration table, wherein the third parameter configuration table is different from the first parameter configuration table; or alternatively

When the configuration mode is that the extra DMRS and the preamble DMRS are configured independently, the k value of the frequency domain resource position mapped by the DMRS sequences of the extra DMRS and the preamble DMRS of the second type is determined according to the following mode:

k＝12n+4k’+Δ

the method comprises the following steps that k' values comprise 0 and 1, N values comprise 0,1, 2, \8230, N and delta are positive integers, and when an additional DMRS is configured with a second type of preposed DMRS, the delta is obtained by a preset second parameter configuration table; when three additional DMRSs are configured with one second-type preamble DMRS, or two additional DMRSs are configured with two second-type preamble DMRSs, delta is obtained from a preset fourth parameter configuration table, wherein the fourth parameter configuration table is different from the second parameter configuration table; or

In the step of determining the configuration of the additional DMRS and the preamble DMRS, the configuration may adopt at least one of the following:

the two additional DMRSs and the two first type of preamble DMRSs are subjected to TD-OCC-4 configuration or independent configuration; alternatively, the first and second electrodes may be,

in the step of determining the configuration of the additional DMRS and the preamble DMRS, the configuration may use at least one of the following:

2. The transmission method according to claim 1, wherein Δ values in the first parameter configuration table and the third parameter configuration table include 0 and 1.

3. The transmission method according to claim 1, wherein Δ values in the second parameter configuration table and the fourth parameter configuration table include 0, 2, and 4.

4. The transmission method according to claim 1, wherein in the step of performing the DMRS transmission, the DMRS that is transmitted includes a scrambling sequence identity, SCID.

5. The transmission method according to claim 4, characterized in that the method further comprises:

6. A method for transmitting a demodulation reference signal (DMRS) is applied to user equipment, and the method comprises the following steps:

determining the frequency domain resource position mapped by the transmitted DMRS sequence according to the configuration mode of the network side equipment for configuring the additional DMRS and the preposed DMRS; the configuration mode is that the extra DMRS and the preposed DMRS are configured independently, or the extra DMRS and the preposed DMRS are configured with time division-orthogonal cover codes TD-OCC; when the configuration mode is that the additional DMRS and the preamble DMRS are configured independently, the k values of the frequency domain resource positions mapped by the DMRS sequences of the additional DMRS and the first type of preamble DMRS are determined according to the following mode:

k＝8n+4k’+Δ；

the method comprises the following steps that k' values comprise 0 and 1, N values comprise 0,1, 2, \8230, N and delta are positive integers, and when an extra DMRS is configured with a first type of preposed DMRS, the delta is obtained by a preset first parameter configuration table; when three additional DMRSs are configured with one first type of preamble DMRS or two additional DMRSs are configured with two first type of preamble DMRSs, obtaining delta from a preset third parameter configuration table, wherein the third parameter configuration table is different from the first parameter configuration table; or alternatively

k＝12n+4k’+Δ

the value of k' comprises 0 and 1, the value of N comprises 0,1, 2, 8230, N and delta are positive integers, and when one additional DMRS is configured with a preposed DMRS of a second type, the delta is obtained by a preset second parameter configuration table; when three additional DMRSs are configured with one second-type preamble DMRS, or two additional DMRSs are configured with two second-type preamble DMRSs, delta is obtained from a preset fourth parameter configuration table, wherein the fourth parameter configuration table is different from the second parameter configuration table; or

The configuration mode adopts at least one of the following modes:

the two additional DMRSs and the two first type of preamble DMRSs are subjected to TD-OCC-4 configuration or independent configuration; or alternatively

The configuration mode adopts at least one of the following modes:

7. The transmission method according to claim 6, wherein Δ values in the first parameter configuration table and the third parameter configuration table include 0 and 1.

8. The transmission method according to claim 6, wherein the values of Δ in the second parameter configuration table and the fourth parameter configuration table include 0, 2, and 4.

9. The transmission method according to claim 6, wherein in the step of obtaining the DMRS sequences transmitted by the network-side device, the obtained DMRS sequences include a scrambling code sequence identity (SCID).

10. A network side device, comprising a processor and a transceiver, wherein the processor is configured to perform the following processes:

determining a configuration mode of an additional DMRS and a preamble DMRS; the configuration mode is that the extra DMRS and the preposed DMRS are configured independently, or the extra DMRS and the preposed DMRS are configured with time division-orthogonal cover codes TD-OCC;

determining the time-frequency resource position mapped by the additional DMRS and the DMRS sequence of the front DMRS in the configuration mode;

carrying out DMRS transmission according to the determined frequency domain resource position;

when the configuration mode is that the additional DMRS and the preamble DMRS are configured independently, the processor determines a k value of a frequency domain resource position mapped by the DMRS sequences of the additional DMRS and the first type of preamble DMRS according to the following mode:

k＝8n+4k’+Δ；

the method comprises the following steps that k' values comprise 0 and 1, N values comprise 0,1, 2, \8230, N and delta are positive integers, and when an extra DMRS is configured with a first type of preposed DMRS, the delta is obtained by a preset first parameter configuration table; when three additional DMRSs are configured with one first-type preamble DMRS or two additional DMRSs are configured with two first-type preamble DMRSs, delta is obtained by a preset third parameter configuration table, wherein the third parameter configuration table is different from the first parameter configuration table; or

When the configuration mode is that the extra DMRS and the preamble DMRS are configured independently, the processor determines the k value of the frequency domain resource position mapped by the DMRS sequences of the extra DMRS and the preamble DMRS of the second type according to the following mode:

k＝12n+4k’+Δ

the method comprises the following steps that k' values comprise 0 and 1, N values comprise 0,1, 2, \8230, N and delta are positive integers, and when an additional DMRS is configured with a second type of preposed DMRS, the delta is obtained by a preset second parameter configuration table; when three additional DMRSs are configured with one second type of preamble DMRS or two additional DMRSs are configured with two second type of preamble DMRSs, obtaining delta from a preset fourth parameter configuration table, wherein the fourth parameter configuration table is different from the second parameter configuration table; or

In the step of determining a configuration of the additional DMRS and the preamble DMRS, the configuration may use at least one of:

11. A user equipment comprising a processor and a transceiver, wherein the processor is configured to perform the following:

determining the position of frequency domain resources mapped by the transmitted DMRS sequence according to a configuration mode that the network side equipment configures the additional DMRS and the preposed DMRS; the configuration mode is that the extra DMRS and the preposed DMRS are respectively and independently configured, or the extra DMRS and the preposed DMRS are subjected to time division-orthogonal cover code TD-OCC configuration;

k＝8n+4k’+Δ；

the value of k' comprises 0 and 1, the value of N comprises 0,1, 2, 8230, N and delta are positive integers, and when one additional DMRS is configured with one preposed DMRS of a first type, the delta is obtained by a preset first parameter configuration table; when three additional DMRSs are configured with one first-type preamble DMRS or two additional DMRSs are configured with two first-type preamble DMRSs, delta is obtained by a preset third parameter configuration table, wherein the third parameter configuration table is different from the first parameter configuration table; or

k＝12n+4k’+Δ

The configuration mode adopts at least one of the following modes:

the two additional DMRSs and the two first type of preamble DMRSs are subjected to TD-OCC-4 configuration or independent configuration; or

The configuration mode adopts at least one of the following modes:

12. A communication device comprising a memory, a processor and a computer program stored on the memory and executable on the processor; characterized in that the processor, when executing the program, implements the transmission method for the DMRS according to any one of claims 1 to 5 or implements the transmission method for the DMRS according to any one of claims 6 to 9.

13. A computer-readable storage medium, having stored thereon a computer program, characterized in that the program, when being executed by a processor, carries out the steps in the method for the transmission of a DMRS as defined in any one of claims 1 to 5 or the steps in the method for the transmission of a DMRS as defined in any one of claims 6 to 9.