CN110890948A

CN110890948A - Transmission method of demodulation reference signal, network side equipment and user equipment

Info

Publication number: CN110890948A
Application number: CN201811042870.XA
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: 2020-03-17
Anticipated expiration: 2038-09-07
Also published as: CN110890948B

Abstract

The invention provides a transmission method of a demodulation reference signal, network side equipment and user equipment. Wherein the method comprises the following steps: configuring a mode of mapping the DMRS sequence to a frequency domain resource position; and transmitting the DMRS according to the mode that the configured DMRS sequence is mapped to the frequency domain resource position. The transmission method configures the mode of mapping the DMRS sequence to the frequency domain resource position, and can solve the problem that the number of 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.

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 large-scale 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 gradually increases.

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;

configuring type 2 maximum 12 orthogonal DMRS ports available.

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:

configuring a mode of mapping the DMRS sequence to a frequency domain resource position;

and transmitting the DMRS according to the mode that the configured DMRS sequence is mapped to the frequency domain resource position.

Optionally, in the transmission method, in the step of configuring a manner in which the DMRS sequences are mapped to frequency-domain resource locations, a k value of the configured first type of DMRS sequences mapped to frequency-domain resource locations is determined according to the following manner:

k＝8n+4k'+△；

the k' value comprises 0 and 1, the N value comprises 0,1, 2, … and N, N is a positive integer, △ is a positive integer, and the N value is obtained by a preset first parameter configuration table.

Optionally, in the transmission method, the configured DMRS of the first type is:

and the DMRS of each port on 1 symbol in 1 physical resource block PRB occupies 3RE resources.

Optionally, in the transmission method, in the configured DMRS of the first type,:

the orthogonal port number of a preposed DMRS symbol is formed by the following steps: comb 4+2 cyclically shifts CS;

the orthogonal port number of the two preposed DMRS symbols is formed by the following steps: comb 4+2CS + time-division-orthogonal cover codes TD-OCC ({ 11 } and { 1-1 }).

on 1 symbol in 1 PRB, a first antenna port is mapped to the 0 th, 4 th and 8 th frequency domain positions corresponding to the DMRS sequence;

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

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

on 1 symbol in 1 PRB, mapping a fourth antenna port to the 3 rd, 7 th and 11 th frequency domain positions corresponding to the DMRS sequence;

on 1 symbol in 1 PRB, obtaining DMRS sequences corresponding to fifth to eighth antenna ports through CS;

and obtaining the DMRS sequences corresponding to the ninth to sixteenth antenna ports through TD-OCC on 2 symbols in 1 PRB.

Optionally, in the transmission method, for the configured DMRS of the first type, one pre-DMRS symbol provides a maximum of 8 orthogonal antenna ports, and two pre-DMRS symbols provide a maximum of 16 orthogonal antenna ports.

Optionally, in the transmission method, the step of configuring a manner of mapping the DMRS sequence to the frequency domain resource location includes:

and adding a cyclic displacement to the configured DMRS sequence of the first type.

k＝4n+2k'+△；

the k' value comprises 0 and 1, the N value comprises 0,1, 2, … and N, N is a positive integer, △ is a positive integer, and the N value is obtained by a preset third parameter configuration table.

the orthogonal port number of a preposed DMRS symbol is formed by the following steps: comb 2+4 CS;

the orthogonal port number of the two preposed DMRS symbols is formed by the following steps: comb 2+4CS + TD-OCC ({ 11 } and { 1-1 }).

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 the third to eighth antenna ports through CS;

and when the symbols are 2 symbols in 1 PRB, obtaining the DMRS sequences corresponding to the ninth to sixteenth antenna ports through TD-OCC.

Optionally, the transmission method may further include determining a k value of the second type of DMRS sequence mapped to the frequency-domain resource location according to the following:

k＝12n+4k′+△，

the k' value comprises 0 and 1, the N value comprises 0,1, 2, … and N, N is a positive integer, △ is a positive integer, and the N value is obtained by a preset second parameter configuration table.

Optionally, in the transmission method, the configured DMRS of the second type is:

DMRSs per port on 1 symbol within 1 PRB occupy 2RE resources.

Optionally, in the transmission method, in the step of configuring the mapping of the DMRS sequences to the frequency-domain resource locations, the configured DMRS of the second type is:

the orthogonal port number of a preposed DMRS symbol is formed by the following steps: performing 2-frequency division-orthogonal covering codes FD-OCC on adjacent REs in a frequency domain;

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, and the time domain is subjected to TD-OCC ({ 11 } and { 1-1 }).

Optionally, the transmission method, wherein, in the configured DMRS of the second type,

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

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

on 1 symbol in 1 PRB, mapping a third antenna port to a 4 th frequency domain position and a 5 th frequency domain position corresponding to the DMRS sequence;

on 1 symbol in 1 PRB, mapping a fourth antenna port to a 6 th and a 7 th frequency domain positions corresponding to the DMRS sequence;

on 1 symbol in 1 PRB, mapping a fifth antenna port to 8 th and 9 th frequency domain positions corresponding to the DMRS sequence;

on 1 symbol in 1 PRB, mapping a sixth antenna port to a 10 th and a 11 th frequency domain positions corresponding to the DMRS sequence;

on 1 symbol in 1 PRB, obtaining DMRS sequences corresponding to seventh to twelfth antenna ports through FD-OCC;

and when the symbols are 2 symbols in 1 PRB, obtaining the DMRS sequences corresponding to the thirteenth to twenty-fourth antenna ports through TD-OCC.

Optionally, in the transmission method, for the configured DMRS of the second type, one pre-DMRS symbol provides 12 orthogonal antenna ports at maximum, and two pre-DMRS symbols provide 24 orthogonal antenna ports at maximum.

Optionally, in the transmission method, the DMRS to be transmitted includes a scrambling 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 transmitted by network side equipment;

and determining the frequency domain resource position of the DMRS according to the mode that the DMRS sequence configured by the network side equipment is mapped to the frequency domain resource position.

Optionally, in the transmission method, in the step of determining the frequency domain resource position of the DMRS according to the manner in which the DMRS sequence configured by the network side device is mapped to the frequency domain resource position, a k value of the frequency domain resource position to which the configured DMRS sequence of the first type is mapped is determined according to the following manner:

k＝8n+4k′+△；

Optionally, in the transmission method, in the step of determining the frequency domain resource position of the DMRS according to the manner in which the DMRS sequence configured by the network side device is mapped to the frequency domain resource position, a k value of the frequency domain resource position to which the configured DMRS sequence of the second type is mapped is determined according to the following manner:

k＝12n+4k′+△，

k＝4n+2k'+△；

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:

Optionally, the network side device, wherein the processor is specifically configured to determine, when the DMRS sequences are mapped to frequency-domain resource locations, a k value of the first type of DMRS sequences mapped to frequency-domain resource locations according to the following:

k＝8n+4k'+△；

Optionally, in the network side device, the configured first type DMRS is:

Optionally, in the network-side device, in the configured DMRS of the first type, the DMRS of the first type includes:

Optionally, in the network-side device, in the configured first type DMRS, one pre-DMRS symbol provides 8 orthogonal antenna ports at most, and two pre-DMRS symbols provide 16 orthogonal antenna ports at most.

Optionally, the network side device, wherein, when configuring a manner of mapping a DMRS sequence to a frequency domain resource location, the processor is specifically configured to: and adding a cyclic displacement to the configured DMRS sequence of the first type.

Optionally, the network side device, wherein the processor, when configuring the manner in which the DMRS sequences are mapped to the frequency domain resource locations, is specifically configured to determine a k value of the first type of DMRS sequences mapped to the frequency domain resource locations according to the following manner:

k＝4n+2k'+△；

Optionally, the network side device, wherein the processor is specifically configured to, when configuring a manner of mapping a DMRS sequence to a frequency domain resource location:

determining a k value of the configured DMRS sequence of the second type mapped to the frequency domain resource location according to the following mode:

k＝12n+4k′+△，

Optionally, in the network side device, the configured DMRS of the second type is:

DMRSs per port on 1 symbol within 1 PRB occupy 2RE resources.

Optionally, the network-side device, wherein, in the configured DMRS of the second type,

Optionally, in the network-side device, in the configured DMRS of the second type, one pre-DMRS symbol provides 12 orthogonal antenna ports at maximum, and two pre-DMRS symbols provide 24 orthogonal antenna ports at maximum.

Optionally, the network-side device, wherein the DMRS transmitted by the processor includes a scrambling sequence identity SCID.

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

The embodiment of the invention provides user equipment, which comprises a processor and a transceiver, wherein the processor is used for executing the following processes:

acquiring a DMRS transmitted by network side equipment;

Optionally, the user equipment, wherein the processor is specifically configured to determine a k value of a frequency-domain resource location mapped by a DMRS sequence of a first type configured by a network side device according to the following manner:

k＝8n+4k′+△；

Optionally, the user equipment is specifically configured to determine a k value of the frequency-domain resource location mapped by the DMRS sequence of the second type configured by the network side device according to the following manner:

k＝12n+4k′+△，

k＝4n+2k'+△；

The embodiment of the invention provides communication equipment, which comprises a memory, a processor and a computer program, wherein the computer program 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 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 DMRS transmission method can solve the problem that the number of configured ports cannot meet the scene requirement of large NOMA overload rate or long code length in the DMRS transmission in the prior art by configuring the mode of mapping the DMRS sequence to the frequency domain resource position.

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 is a schematic diagram of a first structure 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

In order 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 of Mobile communication (GSM) systems, Code Division Multiple Access (CDMA) systems, Wideband Code Division Multiple Access (WCDMA) systems, General Packet Radio Service (GPRS), 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 future evolved Public Land Mobile Network (PLMN), 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, configuring a mode of mapping the DMRS sequence to the frequency domain resource position;

and S220, transmitting the DMRS according to the mode that the configured DMRS sequence is mapped to the frequency domain resource position.

The DMRS transmission method according to the above embodiment configures a manner of mapping a DMRS sequence to a frequency domain resource location, and can solve a problem that in the transmission of a DMRS in the prior art, the number of configured ports cannot meet a scene requirement that a NOMA overload rate is large or a code length is long.

In the embodiment of the invention, the pre-DMRS is defined relative to the extra DMRS, wherein the extra DMRS and the pre-DMRS can be distinguished according to time domain positions, when two DMRSs which are positioned at different time domain positions exist in a Slot, the DMRS which is positioned at the front of the time domain position in the Slot is the pre-DMRS, and the DMRS which is positioned at 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.

Specifically, in the first implementation manner of the method for transmitting a DMRS according to the first embodiment of the present invention, step S210, in the step of configuring a manner that a DMRS sequence is mapped to a frequency domain resource location, a k value of the configured DMRS sequence of the first type mapped to the frequency domain resource location is determined according to the following manner:

k＝8n+4k′+△；

specifically, when the configured first type of DMRS sequence is determined to be mapped to a frequency domain resource position, the k value is a plurality of values, N is respectively set to be one of positive integers of 0,1, … and N, and the obtained plurality of values are k values mapped to the frequency domain resource position by the DMRS sequence.

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

TABLE 1

In addition, when the DMRS sequence is mapped to a frequency domain resource location, the DMRS sequence may be determined according to the following formula:

wherein,

is as follows

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

in addition, as shown in table 1, the value of k' in the above formula is 0 or 1; l' takes the value of 0 or 1; corresponding w_f(k') takes the value +1 or-1, w_tThe value of (l') is +1 or-1, and the value of △ is 0,1, 2 or 3, and the values of the parameters and the corresponding relationship between the parameters can be determined according to the table 1.

Further, when the switching precoding is not enabled, the above is described

In (1),

j-0, 1.,. nu-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; upsilon is a positive integer; when switching precoding is enabled, as described above

Wherein j is 0.

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

In addition, optionally, in the first implementation manner of the method for transmitting DMRS according to the first embodiment of the present invention, in step S210, when configuring a manner that a DMRS sequence is mapped to a frequency-domain resource location, the configured first-type DMRS is:

DMRSs per port on 1 symbol within 1 Physical Resource Block (PRB) occupy 3RE resources.

In addition, the configured DMRS of the first type is:

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

the orthogonal port number of the two preposed DMRS symbols is formed by the following steps: comb 4+2CS + Time-Division-Orthogonal cover codes (Time Division-Orthogonal cover code, TD-OCC) ({ 11 } and { 1-1 }).

As shown in fig. 3, based on the configuration, for the configured first type DMRS, one pre-DMRS symbol provides 8 orthogonal antenna ports at maximum, and two pre-DMRS symbols provide 16 orthogonal antenna ports at maximum.

Further, in the configured DMRS of the first type,

By adopting the first embodiment, according to the first-type DMRS, configured, one pre-DMRS symbol provides 8 orthogonal antenna ports at most, and two pre-DMRS symbols provide 16 orthogonal antenna ports at most, compared with the transmission of DMRSs in the prior art, the first-type DMRS provides 8 orthogonal antenna ports at most, and the number of ports is increased, so as to be able to meet the requirements of scenarios with a large NOMA overload rate or a long code length.

Specifically, in the second implementation manner of the method for transmitting a DMRS according to the first embodiment of the present invention, in step S210, the step of configuring a manner in which the DMRS sequence is mapped to the frequency domain resource location includes:

Based on this approach, the configured first type DMRS is:

Further, in the configured DMRS of the first type,

In addition, in the second embodiment, in the step S210 of configuring the manner in which the DMRS sequences are mapped to the frequency domain resource positions, the k values of the first type of DMRS sequences mapped to the frequency domain resource positions are determined as follows:

k＝4n+2k′+△；

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

TABLE 2

wherein,

is as follows

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

as shown in table 2, k' in the above formula takes the value of 0 or 1; l' has a value of 0 or 1, and

corresponding w_f(k') takes the value +1 or-1, w_tThe value of (l') is +1 or-1, and the value of △ is 0 or 1, and the values of the parameters and the corresponding relationship between the parameters can be determined according to the table 2.

With the second embodiment, in the configured DMRS of the first type, one pre-DMRS symbol provides 8 orthogonal antenna ports at most, and two pre-DMRS symbols provide 16 orthogonal antenna ports at most. Therefore, compared with the transmission of the DMRS in the prior art, the first type DMRS provides 8 orthogonal antenna ports at most, and by adopting the transmission method of the DMRS, the number of the ports is increased, so that the method can adapt to the scene requirement of larger NOMA overload rate or longer code length.

In a third implementation manner of the method for transmitting a DMRS according to the first embodiment of the present invention, in the step of configuring a manner in which a DMRS sequence is mapped to a frequency domain resource location, step S210 is to determine a k value of the configured DMRS sequence of the second type, which is mapped to the frequency domain resource location, according to the following manner:

k＝12n+4k′+△，

specifically, when the configured second type DMRS sequence is determined to be mapped to the frequency domain resource position, the k value is a plurality of values, N is respectively set to be one of positive integers of 0,1, … and N, and the obtained plurality of values are the k values of the DMRS sequence mapped to the frequency domain resource position.

In this embodiment of the present invention, the second parameter configuration table may be the following table 3:

TABLE 3

wherein,

is as follows

in addition, as shown in table 3, the value of k' in the above formula is 0 or 1; l' takes the value of 0 or 1; corresponding w_f(k') takes the value +1 or-1, w_tThe value of (l') is +1 or-1, and the value of △ is 0, 2 or 4, and the values of the parameters and the corresponding relationship between the parameters can be determined according to the table 1.

Further, the above

In (1),

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

In addition, optionally, in a third implementation manner of the method for transmitting DMRS according to the first embodiment of the present invention, in step S210, when configuring a manner in which a DMRS sequence is mapped to a frequency-domain resource location, the configured DMRS of the second type is:

DMRSs per port on 1 symbol within 1 PRB occupy 2RE resources.

Further, in the step of mapping the DMRS sequences to frequency domain resource locations, the configured DMRS of the second type is:

the orthogonal port number of a preposed DMRS symbol is formed by the following steps: frequency-domain neighboring REs perform 2-Frequency Division-Orthogonal cover code (FD-OCC);

In addition, in the configured DMRS of the second type,

Referring to fig. 4, for the second type of DMRS, one pre-DMRS symbol provides 12 orthogonal antenna ports at maximum, and two pre-DMRS symbols provide 24 orthogonal antenna ports at maximum. Therefore, compared with the transmission of the DMRS in the prior art, the DMRS of the second type provides 12 orthogonal antenna ports at most, and by adopting the transmission method of the DMRS, the number of the ports is increased, so that the method can adapt to the scene requirement of larger NOMA overload rate or longer code length.

In step S220, optionally, the DMRS to be transmitted includes a Scrambling Identity (SCID) sequence.

Optionally, the transmission method may further include:

Based on the mode, according to the scrambling code of the SCID configured by the high-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 SCED scrambling code.

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 DMRS is transmitted in the manner configured in step S210.

According to the above description of the embodiments of configuring the DMRS sequences mapped to the frequency domain resource locations in the method for transmitting DMRS according to the embodiments of the present invention, those skilled in the art should understand specific manners and procedures for DMRS transmission using the configurations, and therefore, details are not described 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 transmitted by network side equipment;

s520, determining the frequency domain resource position of the DMRS according to the mode that the DMRS sequence configured by the network side equipment is mapped to the frequency domain resource position.

According to the DMRS transmission method, the network side equipment is used for configuring the mode that the DMRS sequence is mapped to the frequency domain resource position, and the problem that in the transmission of the DMRS in the prior art, the number of configured ports cannot meet the scene requirement of large NOMA overload rate or long code length can be solved.

Optionally, in the first implementation manner of the method for transmitting a DMRS according to the second embodiment of the present invention, in step S520, when determining the frequency domain resource position of the DMRS according to the manner that the DMRS sequence configured by the network side device is mapped to the frequency domain resource position, determining a k value of the frequency domain resource position mapped to the DMRS sequence of the first type according to the following manner:

k＝8n+4k′+△；

specifically, when the configured first type DMRS sequence is determined to be mapped to a frequency domain resource position, the k value is a plurality of values, N is respectively set to be one of positive integers of 0,1, … and N, and the obtained plurality of values are k values mapped to the frequency domain resource position by the DMRS sequence.

The first parameter configuration table is shown in table 1 above.

In addition, in step S520, when the frequency domain resource position of the DMRS is determined according to the manner in which the DMRS sequence configured by the network side device is mapped to the frequency domain resource position, the DMRS sequence may be determined to be mapped to the frequency domain resource position according to the following formula:

wherein,

is the mapped second

Frequency domain resource locations of the DMRS sequences;

Further, when the switching precoding is not enabled, the above is described

In (1),

Wherein j is 0.

In addition, in the first implementation manner of the method for transmitting DMRS according to the second embodiment of the present invention, the first type DMRS configured by the network side device is:

In addition, the configured DMRS of the first type is:

Referring to fig. 3, based on the configuration, for the configured first-type DMRS, one pre-DMRS symbol provides 8 orthogonal antenna ports at most, and two pre-DMRS symbols provide 16 orthogonal antenna ports at most.

Further, in the configured DMRS of the first type,

Optionally, in a second implementation manner of the method for transmitting a DMRS according to the second embodiment of the present invention, in step S520, when determining the frequency domain resource position of the DMRS according to the manner that the DMRS sequence configured by the network side device is mapped to the frequency domain resource position, determining a k value of the frequency domain resource position mapped to the DMRS sequence of the second type 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 3 above.

wherein,

is as follows

Further, the above

In (1),

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

In addition, in a second implementation manner of the method for transmitting DMRS according to the second embodiment of the present invention, the DMRS of the second type configured by the network side device is:

DMRSs per port on 1 symbol within 1 PRB occupy 2RE resources.

In addition, in the configured DMRS of the second type,

Optionally, in a third implementation manner of the method for transmitting a DMRS according to the second embodiment of the present invention, in step S520, when determining the frequency domain resource position of the DMRS according to the manner that the DMRS sequence configured by the network side device is mapped to the frequency domain resource position, determining a k value of the frequency domain resource position mapped to the DMRS sequence of the first type according to the following manner:

k＝4n+2k'+△；

specifically, when the configured first-type DMRS sequence is determined to be mapped to a frequency domain resource position, the k value is a plurality of values, N is respectively set to be one of positive integers of 0,1, … and N, and the obtained plurality of values are k values of the frequency domain resource position mapped by the DMRS sequence.

In this embodiment of the present invention, the third parameter configuration table may be as shown in table 2 above.

wherein,

is the mapped second

Frequency domain resource locations of the DMRS sequences;

In this embodiment, the configured first type DMRS is:

Further, in the configured DMRS of the first type,

With the third embodiment, compared to the prior art, in the first type of DMRS configured by adding cyclic shift to the first type of DMRS sequence, one front DMRS symbol provides a maximum of 8 orthogonal antenna ports, and two front DMRS symbols provide a maximum of 16 orthogonal antenna ports. Therefore, compared with the transmission of the DMRS in the prior art, the first type DMRS provides 8 orthogonal antenna ports at most, and by adopting the transmission method of the DMRS, the number of the ports is increased, so that the method can adapt to the scene requirement of larger 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:

Optionally, the processor 610, when configuring the manner of mapping the DMRS sequences to the frequency domain resource locations, is specifically configured to determine a k value of the configured first type of DMRS sequences mapped to the frequency domain resource locations according to the following manner:

k＝8n+4k'+△；

Optionally, the configured first type DMRS is:

Optionally, in the configured DMRS of the first type:

Optionally, for the configured DMRS of the first type, one preamble DMRS symbol provides a maximum of 8 orthogonal antenna ports, and two preamble DMRS symbols provide a maximum of 16 orthogonal antenna ports.

Optionally, when the processor configures a manner of mapping the DMRS sequence to the frequency domain resource location, the processor is specifically configured to: and adding a cyclic displacement to the configured DMRS sequence of the first type.

Optionally, when configuring the manner in which the DMRS sequences are mapped to the frequency domain resource locations, the processor is specifically configured to determine a k value of the first type of DMRS sequences mapped to the frequency domain resource locations according to the following manner:

k＝4n+2k'+△；

Optionally, in the configured DMRS of the first type:

Optionally, the processor is specifically configured to, when configuring a manner of mapping the DMRS sequence to the frequency domain resource location:

k＝12n+4k′+△，

Optionally, the configured DMRS of the second type is:

DMRSs per port on 1 symbol within 1 PRB occupy 2RE resources.

Optionally, the configured DMRS of the second type is:

Optionally, in the configured DMRS of the second type,

Optionally, for the configured DMRS of the second type, one preamble DMRS symbol provides 12 orthogonal antenna ports at maximum, and two preamble DMRS symbols provide 24 orthogonal antenna ports at maximum.

Optionally, the DMRS transmitted by the processor 610 includes a scrambling code sequence identity SCID.

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 perform the following processes:

acquiring a DMRS transmitted by network side equipment;

The processor is specifically configured to determine a k value of a frequency domain resource location mapped by a DMRS sequence of a first type configured by a network side device according to the following manner:

k＝8n+4k′+△；

Optionally, the processor 710 is specifically configured to determine a k value of the frequency-domain resource location mapped by the DMRS sequence of the second type configured by the network side device according to the following manner:

k＝12n+4k′+△，

k＝4n+2k'+△；

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 the 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:

The processor 820 is configured to map the DMRS sequences to frequency-domain resource locations in the manner described above in the first embodiment, and will not be 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 transmitted by network side equipment;

Specifically, when determining the frequency domain resource position of the DMRS according to the manner in which the DMRS sequence configured by the network side device is mapped to the frequency domain resource position, 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 one or more processors, represented by processor 910, and various circuits, represented by memory 920, 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 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 ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of 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: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

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:

2. The transmission method according to claim 1, wherein in the step of configuring the manner in which the DMRS sequences are mapped to frequency-domain resource locations, the k values of the configured first type of DMRS sequences mapped to frequency-domain resource locations are determined according to:

k＝8n+4k'+△；

3. The transmission method according to claim 2, wherein the configured DMRS of the first type is:

4. The transmission method according to claim 2, wherein, in the configured DMRS of the first type:

5. The transmission method according to claim 2, wherein, in the configured DMRS of the first type:

6. The transmission method according to claim 2,

and in the configured first type DMRS, one preposed DMRS symbol provides 8 orthogonal antenna ports at most, and two preposed DMRS symbols provide 16 orthogonal antenna ports at most.

7. The transmission method according to claim 1, wherein the step of configuring the manner in which the DMRS sequences are mapped to the frequency domain resource locations comprises:

8. The transmission method according to claim 1, wherein in the step of configuring the manner in which the DMRS sequences are mapped to frequency-domain resource locations, the k values of the configured first type of DMRS sequences mapped to frequency-domain resource locations are determined according to:

k＝4n+2k'+△；

9. The transmission method according to claim 7 or 8, wherein, in the configured DMRS of the first type:

10. The transmission method according to claim 7 or 8, wherein, in the configured DMRS of the first type:

11. The transmission method according to claim 7 or 8,

12. The transmission method according to claim 1, characterized in that:

k＝12n+4k′+△，

13. The transmission method according to claim 12, wherein the DMRS of the second type is configured to:

DMRSs per port on 1 symbol within 1 PRB occupy 2RE resources.

14. The transmission method according to claim 12, wherein in the step of configuring the mapping of the DMRS sequences to the frequency-domain resource locations, the second type DMRS is configured as:

15. The transmission method according to claim 12, wherein, in the configured DMRS of the second type,

16. The transmission method according to claim 12,

and in the configured second type DMRS, one preposed DMRS symbol provides 12 orthogonal antenna ports at most, and two preposed DMRS symbols provide 24 orthogonal antenna ports at most.

17. The transmission method according to claim 1, wherein the transmitted DMRS includes a scrambling sequence identity, SCID.

18. The transmission method according to claim 17, wherein the method further comprises:

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

acquiring a DMRS transmitted by network side equipment;

20. The transmission method according to claim 19, wherein, in the step of determining the frequency-domain resource locations of the DMRS according to the manner in which the DMRS sequences configured by the network-side device are mapped to the frequency-domain resource locations, the k values of the frequency-domain resource locations mapped to the DMRS sequences of the first type are determined according to the following manner:

k＝8n+4k′+△；

21. The transmission method according to claim 19, wherein, in the step of determining the frequency-domain resource locations of the DMRS according to the manner in which the DMRS sequences configured by the network-side device are mapped to the frequency-domain resource locations, the k values of the frequency-domain resource locations mapped to the DMRS sequences of the second type are determined according to the following manner:

k＝12n+4k′+△，

22. The transmission method according to claim 19, wherein, in the step of determining the frequency-domain resource locations of the DMRS according to the manner in which the DMRS sequences configured by the network-side device are mapped to the frequency-domain resource locations, the k values of the frequency-domain resource locations mapped to the DMRS sequences of the first type are determined according to the following manner:

k＝4n+2k'+△；

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

24. The network-side device of claim 23, wherein the processor, when configuring the manner in which the DMRS sequences are mapped to the frequency-domain resource locations, is specifically configured to determine k values of the configured DMRS sequences of the first type that are mapped to the frequency-domain resource locations according to:

k＝8n+4k'+△；

25. The network-side device of claim 23, wherein the processor, when configuring the manner in which the DMRS sequences are mapped to frequency-domain resource locations, is specifically configured to determine k values for the configured DMRS sequences of the first type to be mapped to frequency-domain resource locations according to the following:

k＝4n+2k'+△；

26. The network-side device of claim 23, wherein the processor, when configuring the manner in which the DMRS sequences are mapped to frequency-domain resource locations, is specifically configured to:

k＝12n+4k′+△，

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

acquiring a DMRS transmitted by network side equipment;

28. The UE of claim 27, wherein the processor is specifically configured to determine a k value for mapping a first type of DMRS sequence configured by a network side device to a frequency-domain resource location according to the following:

k＝8n+4k′+△；

29. The UE of claim 27, wherein the processor is specifically configured to determine a k value for mapping a second type of DMRS sequence configured by a network side device to a frequency-domain resource location according to the following:

k＝12n+4k′+△，

30. The UE of claim 27, wherein the processor is specifically configured to determine a k value for mapping a second type of DMRS sequence configured by a network side device to a frequency-domain resource location according to the following:

k＝4n+2k'+△；

31. 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 18 or implements the transmission method for the DMRS according to any one of claims 19 to 22.

32. A computer readable storage medium, having stored thereon a computer program, characterized in that the program, when executed by a processor, carries out the steps in the transmission method for a DMRS as defined in any one of claims 1 to 18 or the steps in the transmission method for a DMRS as defined in any one of claims 19 to 22.