CN110418411B - DMRS indication method, device and network device - Google Patents

Abstract

The present invention provides a DMRS indication method, device and network equipment, which relate to the field of communication and are invented to solve the problem that the number of DMRS cannot meet the increasing number of user terminals. The method includes: obtaining a target DMRS port indication table corresponding to a target DMRS pattern, wherein the target DMRS pattern is obtained according to a target OFDM symbol bit and OCC, and the target OFDM symbol bit is obtained from the first OFDM symbol bit and the second OFDM symbol bits, the first OFDM symbol bits are the original OFDM symbol bits used by the original DMRS, and the number of the second OFDM symbol bits is an integer multiple of the first OFDM symbol bits; according to the target DMRS port indication table, The DMRS indication information is sent to the user terminal, so that the user terminal transmits data according to the DMRS indication information. The present invention can be applied in NOMA technology.

Description

DMRS indication method, device and network device

technical field

The present invention relates to the field of communication technologies, and in particular, to a DMRS indication method, device and network equipment.

Background technique

In the 5G network, in order to increase the transmission speed and reduce the user delay, the Non-orthogonal Multiple Access (NOMA) technology can be used to transmit data. Specifically, the base station allocates available transmission resources for a user terminal (User Equipment, UE) from a preset transmission resource pool, and the UE uses the transmission resources for data transmission. However, due to the non-orthogonal nature of NOMA technology, interference and collision may occur when multiple UEs transmit data simultaneously.

In order to solve the above problem, in the prior art, the base station allocates mutually orthogonal demodulation reference signals (Demodulation Reference Signal, DMRS) to each UE, and the UE obtains transmission resources according to the DMRS and performs data transmission.

The existing technology allocates a unique DMRS to each UE. However, with the continuous development of network technology, the number of UEs increases day by day. How to expand the number of DMRSs to meet the requirement that a large number of UEs can use the same time-frequency when using NOMA technology. The resource transmission data has become an urgent problem to be solved.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a DMRS indication method, apparatus, and network equipment, so as to solve the problem that the number of existing DMRSs cannot meet the increasing number of user terminals.

In order to solve the above-mentioned technical problems, the present invention is achieved in this way:

In a first aspect, an embodiment of the present invention provides a DMRS indication method, including: obtaining a target DMRS port indication table corresponding to a target DMRS pattern, wherein the target DMRS pattern is based on the target OFDM symbol bits and positive OFDM symbols. The cross-mask OCC is obtained, the target OFDM symbol bit is composed of a first OFDM symbol bit and a second OFDM symbol bit, the first OFDM symbol bit is the original OFDM symbol bit used by the original DMRS, and the second OFDM symbol bit is The number of is an integer multiple of the first OFDM symbol bits; according to the target DMRS port indication table, DMRS indication information is sent to the user terminal, so that the user terminal transmits data according to the DMRS indication information.

In a second aspect, an embodiment of the present invention further provides a DMRS indication device, including:

a first obtaining module, configured to obtain a target DMRS port indication table corresponding to a target DMRS pattern, wherein the target DMRS pattern is obtained by the second obtaining module according to the target orthogonal frequency division multiplexing OFDM symbol bits and the orthogonal mask OCC, The target OFDM symbol bits are composed of first OFDM symbol bits and second OFDM symbol bits, the first OFDM symbol bits are the original OFDM symbol bits used by the original DMRS, and the number of the second OFDM symbol bits is the an integer multiple of the first OFDM symbol bits;

A sending module, configured to send DMRS indication information to the user terminal according to the target DMRS port indication table obtained by the first obtaining module, so that the user terminal transmits data according to the DMRS indication information.

In a third aspect, an embodiment of the present invention further provides a network device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program being executed by the processor When executed, the steps of the aforementioned DMRS indication method are implemented.

In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, comprising: a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the aforementioned DMRS indication method is implemented steps in .

According to the technical solution provided by the embodiment of the present invention, the number of target OFDM symbol bits is increased compared with the number of original OFDM symbol bits used by the original DMRS, so that the number of target DMRSpatterns generated according to the target OFDM symbol bits and the preset orthogonal mask OCC The number of target DMRS ports is also increased, thereby increasing the number of target DMRS ports, which solves the problem that the number of DMRSs in the prior art cannot meet the increasing number of user terminals. Since the number of DMRSs increases, the interference and collision of data transmitted by the user terminal using the NOMA technology are reduced.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor.

1 is a flowchart of a method for indicating a DMRS provided by an embodiment of the present invention;

2 is a flowchart 1 of a method for obtaining a target DMRS pattern in the DMRS indication method provided by the embodiment of the present invention shown in FIG. 1;

3 is a schematic diagram of target OFDM symbol bits in the first scenario in the DMRS indication method provided by an embodiment of the present invention;

4 is a schematic diagram of the DMR pattern of UE0 and UE1 in the first scene in the DMRS indication method provided by the embodiment of the present invention;

5 is a schematic diagram of a DMRS pattern of UE2 and UE3 in the first scenario of the DMRS indication method provided by the embodiment of the present invention;

6 is a schematic diagram of a DMRS pattern of UE4 and UE5 in the first scenario of the DMRS indication method provided by the embodiment of the present invention;

FIG. 7 is a schematic diagram of the DMR pattern of UE6 and UE7 in the second scenario of the DMRS indication method provided by the embodiment of the present invention;

8 is a second flowchart of a method for obtaining a target DMRS pattern in the DMRS indication method provided by the embodiment of the present invention shown in FIG. 1;

9 is a schematic diagram of a target OFDM symbol bit under scenario two in a DMRS indication method provided by an embodiment of the present invention;

FIG. 10 is a schematic diagram 1 of a DMRS pattern of UE0-UE3 in scenario two in a DMRS indication method provided by an embodiment of the present invention;

11 is a schematic diagram of a DMR pattern of UE4-UE7 in scenario two in a DMRS indication method provided by an embodiment of the present invention;

12 is a schematic diagram of a DMR pattern of UE8-UE11 in scenario two in a DMRS indication method provided by an embodiment of the present invention;

13 is a schematic diagram of a DMR pattern of UE12-UE15 in scenario two in a DMRS indication method provided by an embodiment of the present invention;

14 is a third flowchart of a method for obtaining a target DMRS pattern in the DMRS indication method provided by the embodiment of the present invention shown in FIG. 1;

15 is a schematic diagram of a DMR pattern of UE0-UE3 in scenario three in a DMRS indication method provided by an embodiment of the present invention;

16 is a schematic diagram of a DMR pattern of UE4-UE7 in scenario three in a DMRS indication method provided by an embodiment of the present invention;

17 is a schematic diagram of a DMR pattern of UE8-UE11 in scenario three in a DMRS indication method provided by an embodiment of the present invention;

18 is a schematic diagram of a DMR pattern of UE12-UE15 in scenario three in a DMRS indication method provided by an embodiment of the present invention;

Fig. 19 is the flow chart four of the method for obtaining target DMRSpattern in the indication method of DMRS provided by the embodiment of the present invention shown in Fig. 1;

Figure 20 is a schematic diagram of the DMR pattern of UE0 and UE1 under scenario four in the DMRS indication method provided by the embodiment of the present invention;

Figure 21 is a schematic diagram of the DMR pattern of UE2 and UE3 under scenario four in the DMRS indication method provided by the embodiment of the present invention;

Figure 22 is a schematic diagram of the DMR pattern of UE4 and UE5 under scenario four in the DMRS indication method provided by the embodiment of the present invention;

Figure 23 is a schematic diagram of the DMR pattern of UE6 and UE7 under scenario four in the DMRS indication method provided by the embodiment of the present invention;

24 is a schematic diagram of a DMR pattern of UE8 and UE9 under scenario four in the DMRS indication method provided by the embodiment of the present invention;

25 is a schematic diagram of a DMR pattern of UE10 and UE11 in scenario four in a DMRS indication method provided by an embodiment of the present invention;

Figure 26 is a schematic diagram 2 of a DMR pattern of UE0-UE3 in a second scenario in a DMRS indication method provided by an embodiment of the present invention;

27 is a flowchart of a method for indicating a DMRS provided by another embodiment of the present invention;

28 is a schematic diagram of the original DMRPattern in the DMRS indication method provided by another embodiment of the present invention;

29 is a schematic diagram of a target DMRSpattern in a DMRS indication method provided by another embodiment of the present invention;

30 is a schematic structural diagram of a DMRS indication device provided by an embodiment of the present invention;

FIG. 31 is a first structural diagram of the second acquisition module 3002 in the DMRS indication device provided by the embodiment of the present invention shown in FIG. 30;

FIG. 32 is a second structural diagram of the second acquisition module 3002 in the DMRS indication device provided by the embodiment of the present invention shown in FIG. 30;

FIG. 33 is a third structural diagram of the second acquisition module 3002 in the DMRS indication device provided by the embodiment of the present invention shown in FIG. 30;

FIG. 34 is a fourth schematic structural diagram of the second acquisition module 3002 in the DMRS indication device provided by the embodiment of the present invention shown in FIG. 30 .

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in FIG. 1, the DMRS indication method provided by the embodiment of the present invention includes:

Step 101: Obtain a target DMRS port indication table corresponding to the target DMRS pattern, wherein the target DMRS pattern is obtained according to the target orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbol bits and an orthogonal cover code (Orthogonal Cover Code, OCC) , the target OFDM symbol bits are composed of the first OFDM symbol bits and the second OFDM symbol bits, the first OFDM symbol bits are the original OFDM symbol bits used by the original DMRS, and the number of the second OFDM symbol bits is an integer of the first OFDM symbol bits times.

The OFDM symbol bit in this embodiment may refer to the smallest unit of data transmission in the time domain.

In this embodiment, due to different configuration modes of the original DMRS and different OCC lengths adopted by the original DMRS, the number of original OFDM symbol bits is different, and the maximum number of code division multiplexing (CDM) groups is also different. For example: when the configuration mode of the original DMRS is comb, the number of original OFDM symbol bits is 1, the OCC length is 2, and the largest comb is 2, the largest CDM group is 2; when the configuration mode of the original DMRS is 2 It is a comb, the number of original OFDM symbol bits is 2, the largest comb is 2, the largest CDM group is 2, and the OCC length is 4; when the original DMRS configuration mode is Frequency Division Multiplexing (Frequency Division Multiplexing) , FDM), the number of original OFDM symbol bits is 1, the largest CDM group is 3, and the OCC length is 2.

In this embodiment, theoretically speaking, the number of bits of the second OFDM symbol may be any integer multiple of the bits of the first OFDM symbol. However, considering the resource occupation of the DMRS in the actual use process, preferably, this embodiment is described by taking the number of the second OFDM symbol bits as the same (1 times) as the number of the first OFDM symbol bits as an example.

At this time, when the configuration mode of the original DMRS is comb, comb is 2, the number of target OFDM symbol bits is 2, and the OCC length is 2, the largest CDM group is 4; when the configuration mode of the original DMRS is comb, When the comb is 2, the number of target OFDM symbol bits is 4, and the OCC length is 4, the largest CDM group is 4; when the original DMRS configuration is FDM, the number of target OFDM symbol bits is 4, and the OCC length is 2 , the largest CDM group is 12.

It should be noted that the existing technology cannot perform DMRS configuration for the case where the original DMRS configuration mode is comb, the comb is 4, and the OCC length is a CDM group greater than or equal to 4. In order to solve this problem, in this embodiment, the target The OFDM symbol bits consist of 4 OFDM symbol bits.

Further, it should be noted that this embodiment does not limit the positional relationship between the first OFDM symbol bit and the second OFDM symbol bit in the target OFDM symbol bit. In actual use, the first OFDM symbol bit and the second OFDM symbol bit are not limited. Two OFDM symbol bits can be arranged adjacently or at intervals.

Further, if the second OFDM symbol bits and the first OFDM symbol bits are set at intervals, that is: the second OFDM symbol bits are not adjacent to the original OFDM symbol bits of the original DMRS, the interval may be a multiple of one OFDM symbol or an extension The DMRS occupies the position of the OFDM symbol bits of the extra DMRS. Of course, other intervals may also be set as required in the actual use process, and each situation will not be described in detail here.

In order to enable those skilled in the art to more clearly understand the acquisition method of the target DMRS pattern in step 101, the following describes in detail through different scenarios:

Scenario 1: The configuration mode of the target DMRS is comb, when the comb is 2, the length of the OCC is 2, and the number of target OFDM symbol bits is 2.

As shown in Figure 2, the method for obtaining the target DMRS pattern includes the following steps:

Step 201: Select one OFDM symbol bit from the target OFDM symbol bit as the first to-be-used OFDM symbol bit.

As shown in FIG. 3 , the target OFDM symbol bits are OFDM0 and OFDM1, and in step 201, one OFDM symbol bit may be arbitrarily selected from OFDM0 and OFDM1 as the first OFDM symbol bit to be used. It should be noted that, in this embodiment, OFDM0 and OFDM1 are only used to distinguish two OFDM bits in the target OFDM symbol bits, and are not the positions of the target OFDM symbol bits in the actual sense.

It should be noted that FIG. 3 only takes the adjacent setting of the first OFDM (OFDM0) and the second OFDM (OFDM1) as an example for description, and may also be set at intervals in actual use, and no specific description is given here.

Step 202: Obtain the target DMRSpattern according to the configuration mode of the target DMRS, the OCC, and the first OFDM to be used.

在本实施例中，第一待使用的OFDM符号位使用OCC码可以为8个UE生成目标DMRS pattern。下面以8个UE为UE0-UE7为例进行说明：Among them, the length of OCC is 2, and the OCC code can be expressed as

In this embodiment, the first to-be-used OFDM symbol bit can generate a target DMRS pattern for 8 UEs by using the OCC code. The following description takes 8 UEs as UE0-UE7 as an example:

1. When UE0 and UE1 use the first comb, the DMRS pattern of UE0 and UE1 is shown in Figure 4. The DMRS pattern used by UE0 uses [a,b]=[1,1], and the DMRS pattern used by UE1 uses [a,b]=[1,-1].

2. When UE2 and UE3 use the second comb, the DMRS pattern of UE2 and UE3 is as shown in Figure 5. For the DMRS pattern of UE2, use [a,b]=[1,1], and the DMRS pattern of UE3 uses [ a,b]=[1, -1].

3. When UE4 and UE5 use the third comb, the DMRS pattern of UE4 and UE5 is shown in Figure 6, the DMRS pattern of UE4 uses [a,b]=[1,1], and the DMRS pattern of UE5 uses [a ,b]=[1, -1].

4. When UE6 and UE7 use the fourth comb, the DMRS pattern of UE6 and UE7 is shown in Figure 7. The DMRS pattern of UE6 uses [a,b]=[1,1], and the DMRS pattern of UE7 uses [a ,b]=[1, -1].

Scenario 2: The configuration mode of the target DMRS is comb when the comb is 2, the length of the OCC is 4, and the number of the target OFDM symbol bits is 4.

As shown in Figure 8, the method for obtaining the target DMRS pattern includes the following steps:

Step 801: Select two consecutive OFDM symbol bits from the target OFDM symbol bits as the second to-be-used OFDM symbol bits.

As shown in FIG. 9 , the target OFDM symbol bits are OFDM0-OFDM3, and in step 301, two consecutive OFDM symbol bits may be arbitrarily selected from OFDM0-OFDM3 as the second to-be-used OFDM symbol bits. For example, OFDM0 and OFDM1 are selected as the second OFDM symbol bits to be used, or OFDM2 and OFDM3 are selected as the second OFDM symbol bits to be used. It should be noted that, in this embodiment, OFDM0-OFDM3 are only used to distinguish 4 OFDM bits in the target OFDM symbol bits, and are not the positions of the target OFDM symbol bits in the actual sense.

It should be noted that Fig. 9 only takes the adjacent setting of the original OFDM symbol bits (OFDM0 and OFDM1) and the expanded OFDM (OFDM2 and OFDM3) as an example for illustration, and can also be set at intervals in the actual use process, here No specific instructions are given.

Step 802: Obtain the target DMRS pattern according to the configuration mode of the target DMRS, the OCC, and the second OFDM to be used.

在本实施例中，步骤802第二待使用的OFDM符号位采用OCC码可以为16个UE生成目标DMRS pattern。下面以16个UE为UE0-UE15为例进行说明：Among them, the length of OCC is 4, and the OCC code can represent

In this embodiment, the second to-be-used OFDM symbol bit in step 802 can generate a target DMRS pattern for 16 UEs by using the OCC code. The following description takes 16 UEs as UE0-UE15 as an example:

1. The DMRS pattern of UE0-UE3 is shown in Figure 10. The DMRS pattern of UE0 uses [a,b,c,d]=[1,1,1,1]; the DMRS pattern of UE1 uses [a,b,c] ,d]=[1,1,-1,-1]; the DMRS pattern of UE2 uses [a,b,c,d]=[1,-1,1,-1]; the DMRS pattern of UE4 uses [a ,b,c,d]=[1,-1,-1,1].

2. The DMRS pattern of UE4-UE7 is shown in Figure 11. The DMRS pattern of UE4 uses [a,b,c,d]=[1,1,1,1]; the DMRS pattern of UE5 uses [a,b,c] ,d]=[1,1,-1,-1]; the DMRS pattern of UE6 uses [a,b,c,d]=[1,-1,1,-1]; the DMRS pattern of UE7 uses [a ,b,c,d]=[1,-1,-1,1].

3. The DMRS pattern of UE8-UE11 is shown in Figure 12. The DMRS pattern of UE8 uses [a,b,c,d]=[1,1,1,1]; the DMRS pattern of UE9 uses [a,b,c] ,d]=[1,1,-1,-1]; the DMRS pattern of UE10 uses [a,b,c,d]=[1,-1,1,-1]; the DMRS pattern of UE11 uses [a ,b,c,d]=[1,-1,-1,1].

4. The DMRS pattern of UE12-UE15 is shown in Figure 13, the DMRS pattern of UE12 uses [a,b,c,d]=[1,1,1,1]; the DMRS pattern of UE13 uses [a,b,c] ,d]=[1,1,-1,-1]; the DMRS pattern of UE14 uses [a,b,c,d]=[1,-1,1,-1]; the DMRS pattern of UE15 uses [a ,b,c,d]=[1,-1,-1,1].

Scenario 3: The configuration mode of the target DMRS is comb, the comb is 4, the length of the OCC is 4, and the number of the target OFDM symbol bits is 4.

As shown in Figure 14, the method for obtaining the target DMRS pattern includes the following steps:

Step 1401: Obtain all four OFDM symbol bits from the target OFDM symbol bits as the third to-be-used OFDM symbol bits.

As shown in FIG. 9 , the target OFDM symbol bits are OFDM0-OFDM3, and in step 1401, all OFDM0-OFDM3 can be acquired as the third to-be-used OFDM symbol bits. It should be noted that, in this embodiment, OFDM0-OFDM3 are only used to distinguish 4 OFDM bits in the target OFDM symbol bits, and are not the positions of the target OFDM symbol bits in the actual sense.

Step 1402: Obtain the target DMRSpattern according to the configuration mode of the target DMRS, the OCC, and the third OFDM to be used.

在本实施例中，第三待使用的OFDM符号位使用OCC码可以为16个UE生成目标DMRS pattern。下面以16个UE为UE0-UE15为例进行说明：Among them, the length of OCC is 4, and the OCC code can represent

In this embodiment, the third to-be-used OFDM symbol bit can generate a target DMRS pattern for 16 UEs by using the OCC code. The following description takes 16 UEs as UE0-UE15 as an example:

1. The DMRS pattern of UE0-UE3 is shown in Figure 15. The DMRS pattern of UE0 uses [a,b,c,d]=[1,1,1,1]; the DMRS pattern of UE1 uses [a,b,c] ,d]=[1,1,-1,-1]; the DMRS pattern of UE2 uses [a,b,c,d]=[1,-1,1,-1]; the DMRS pattern of UE4 uses [a ,b,c,d]=[1,-1,-1,1].

2. The DMRS pattern of UE4-UE7 is shown in Figure 16. The DMRS pattern of UE4 uses [a,b,c,d]=[1,1,1,1]; the DMRS pattern of UE5 uses [a,b,c] ,d]=[1,1,-1,-1]; the DMRS pattern of UE6 uses [a,b,c,d]=[1,-1,1,-1]; the DMRS pattern of UE7 uses [a ,b,c,d]=[1,-1,-1,1].

3. The DMRS pattern of UE8-UE11 is shown in Figure 17. The DMRS pattern of UE8 uses [a,b,c,d]=[1,1,1,1]; the DMRS pattern of UE9 uses [a,b,c] ,d]=[1,1,-1,-1]; the DMRS pattern of UE10 uses [a,b,c,d]=[1,-1,1,-1]; the DMRS pattern of UE11 uses [a ,b,c,d]=[1,-1,-1,1].

4. The DMRS pattern of UE12-UE15 is shown in Figure 18. The DMRS pattern of UE12 uses [a,b,c,d]=[1,1,1,1]; the DMRS pattern of UE13 uses [a,b,c] ,d]=[1,1,-1,-1]; the DMRS pattern of UE14 uses [a,b,c,d]=[1,-1,1,-1]; the DMRS pattern of UE15 uses [a ,b,c,d]=[1,-1,-1,1].

Scenario 4: The configuration mode of the target DMRS is FDM, the number of target OFDM symbol bits is 2 or 4, and the length of the OCC is 2.

As shown in Figure 19, the method for obtaining the target DMRS pattern includes the following steps:

Step 1901, if the target OFDM symbol bit number is 2, select one OFDM symbol bit from the target OFDM symbol bit as the fourth to-be-used OFDM symbol bit, or, if the target OFDM symbol bit number is 4, select one OFDM symbol bit from the target OFDM symbol bit. Two consecutive OFDM symbol bits are selected as the fourth to-be-used OFDM symbol bits.

In this embodiment, if the number of target OFDM symbol bits is 2, the target OFDM symbol bits may be as shown in FIG. 3 , and the specific implementation method of step 1901 may refer to the description of step 201 shown in FIG. 2 , which will not be repeated here. .

In this embodiment, if the number of target OFDM symbol bits is 4, the target OFDM symbol bits may be as shown in FIG. 9 , and the specific implementation method of step 1901 may refer to step 801 shown in FIG.

Step 1902: Obtain the target DMRS pattern according to the configuration mode of the target DMRS, the OCC, and the fourth OFDM to be used.

本实施例以目标 OFDM个数为4的情况为例进行说明，本领域技术人员可以根据目标OFDM个数为4的方法联想到目标OFDM个数为2的方法，此处不对每种情况进行一一赘述。第三待使用的OFDM符号位采用OCC码可以为24个UE生成目标DMRS pattern。下面以24个UE为UE0-UE23为例进行说明：Among them, the length of OCC is 2, and the OCC code can be expressed as

In this embodiment, the case where the number of target OFDMs is 4 is used as an example for description. Those skilled in the art can think of the method where the number of target OFDMs is 2 according to the method that the number of target OFDMs is 4. Here, we do not carry out a detailed description of each case here. One more elaboration. The third to-be-used OFDM symbol bit can generate a target DMRS pattern for 24 UEs by using the OCC code. The following description takes 24 UEs as UE0-UE23 as an example:

1. The DMRS patterns of UE0 and UE1 are shown in FIG. 20 . The DMRS pattern of UE0 uses [a,b]=[1,1]; the DMRS pattern of UE1 uses [a,b]=[1,-1].

2. The DMRS patterns of UE2 and UE3 are shown in FIG. 21 . The DMRS pattern of UE2 uses [a,b]=[1,1]; the DMRS pattern of UE3 uses [a,b]=[1,-1].

3. The DMRS patterns of UE4 and UE5 are shown in FIG. 22 . The DMRS pattern of UE4 uses [a,b]=[1,1]; the DMRS pattern of UE5 uses [a,b]=[1,-1].

4. The DMRS patterns of UE6 and UE7 are shown in FIG. 23 . The DMRS pattern of UE6 uses [a,b]=[1,1]; the DMRS pattern of UE7 uses [a,b]=[1,-1].

5. The DMRS patterns of UE8 and UE9 are shown in FIG. 24 . The DMRS pattern of UE8 uses [a,b]=[1,1]; the DMRS pattern of UE9 uses [a,b]=[1,-1].

6. The DMRS patterns of UE10 and UE11 are shown in FIG. 25 . The DMRS pattern of UE10 uses [a,b]=[1,1]; the DMRS pattern of UE11 uses [a,b]=[1,-1].

In this embodiment, the DMRS pattern of UE12-UE23 is basically the same as the DMRS pattern of UE0-UE11, the difference is that the third to-be-used OFDM symbol bits of UE0-UE11 are OFDM0 and OFDM1, while the third to-be-used OFDM symbol bits of UE12-UE23 The OFDM symbol bits used are OFDM2 and OFDM3, and the DMRS pattern of UE12-UE23 is not specifically described here.

It should be noted that, in this embodiment, the target DMRS pattern is set by more than two groups of identical OCCs. Generally, the order of each group of OCCs is the same. For example, when the OCC length is 2, the order of OCCs is the same. is a, b; when the OCC length is 4, the order of the OCC is a, b, c, d.

Preferably, in order to achieve the purpose of power balance, in the technical solution provided by the embodiment of the present invention, the order of each group of OCCs may be different. For example, in the example shown in FIG. 10 , the order of the second group of OCCs may be set to c ,d,a,b, then at this time, the DMRS pattern corresponding to FIG. 10 can be replaced with the one shown in FIG. 26 .

In this embodiment, when the data transmission waveform, the DMRS configuration type and the maximum length of the DMRS symbol are different, the target DMRS port indication table is also different. In order to enable those skilled in the art to more clearly understand the technical solutions provided by the embodiments of the present invention, the following describes the target DMRS port indication tables in different scenarios in detail:

scene one:

Antenna port(s),PUSCH-tp=Enabled

UL-DMRS-config-type=1, UL-DMRS-max-len=1

Wherein, Antenna port(s) is the antenna port, and PUSCH-tp=Enabled indicates that the data transmission waveform is Single-carrier Frequency-Division Multiple Access (SC-FDMA); UL-DMRS-config-type= 1 indicates that the DMRS configuration type is comb; UL-DMRS-max-len=1 indicates that the maximum length of the DMRS symbol is 1.

The target DMRS pattern can be shown in Figure 4-7. The preset target DMRS ports are 0-3 corresponding to OFDM0 and 4-7 corresponding to OFDM1. At this time, the target DMRS port indication table can be as follows Table 1 shows:

Table 1

Scenario two:

Antenna port(s),PUSCH-tp=Enabled

UL-DMRS-config-type=1, UL-DMRS-max-len=2

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Enabled indicates that the data transmission waveform is SC-FDMA; UL-DMRS-config-type=1 indicates that the DMRS configuration type is comb; UL-DMRS-max-len= 2 means that the maximum length of a DMRS symbol is 2.

The target DMRS pattern can be shown in Figure 10-13. The preset target DMRS ports are 0-7 corresponding to OFDM0 and OFDM1, and 8-15 corresponding to OFDM2 and OFDM3. At this time, the target DMRS port The indicator table can be as shown in Table 2:

Table 2

Scenario three:

Antenna port(s),PUSCH-tp=Enabled

UL-DMRS-config-type=1, UL-DMRS-max-len=4

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Enabled indicates that the data transmission waveform is SC-FDMA; UL-DMRS-config-type=1 indicates that the DMRS configuration type is comb; UL-DMRS-max-len= 4 means that the maximum length of a DMRS symbol is 4.

The target DMRS pattern can be shown in Figure 10-13. The preset target DMRS ports are 0-7 corresponding to OFDM0 and OFDM1, and 8-15 corresponding to OFDM2 and OFDM3. At this time, the target DMRS port The indicator table can be as shown in Table 3:

table 3

Scenario four:

Antenna port(s),PUSCH-tp=Disabled,

UL-DMRS-config-type=1, UL-DMRS-max-len=1, rank=1

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Disabled indicates that the data transmission waveform is Cyclic-Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM), UL-DMRS-config-type= 1 indicates that the DMRS configuration type is comb; UL-DMRS-max-len=1 indicates that the maximum length of the DMRS symbol is 1, and rank=1 indicates that the channel rank number is 1.

The target DMRS pattern can be shown in Figure 4-7. The preset target DMRS ports are 0-3 corresponding to OFDM0 and 4-7 corresponding to OFDM1. At this time, the target DMRS port indication table can be as follows Table 4 shows:

Table 4

Scenario five:

Antenna port(s),PUSCH-tp=Disabled,

UL-DMRS-config-type=1, UL-DMRS-max-len=1, rank=2

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Disabled indicates that the data transmission waveform is CP-OFDM, and UL-DMRS-config-type=1 indicates that the DMRS configuration type is comb; UL-DMRS-max-len= 1 indicates that the maximum length of the DMRS symbol is 1, and rank=2 indicates that the channel rank is 2.

The target DMRS pattern can be shown in Figure 4-7. The preset target DMRS ports are 0-3 corresponding to OFDM0 and 4-7 corresponding to OFDM1. At this time, the target DMRS port indication table can be as follows Table 5 shows:

Value Number of DMRS CDM group(s)without data DMRS port(s) 0 2 0,1 1 2 2,3 2 2 4,5 3 2 6,7 4 2 0,2 5 2 1,3 6 2 4,6 7 2 5,7

table 5

Scenario six:

Antenna port(s),PUSCH-tp=Disabled,

UL-DMRS-config-type=1, UL-DMRS-max-len=1, rank=3

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Disabled indicates that the data transmission waveform is CP-OFDM, and UL-DMRS-config-type=1 indicates that the DMRS configuration type is comb; UL-DMRS-max-len= 1 indicates that the maximum length of the DMRS symbol is 1, and rank=3 indicates that the channel rank number is 3.

The target DMRS pattern can be shown in Figure 4-7. The preset target DMRS ports are 0-3 corresponding to OFDM0 and 4-7 corresponding to OFDM1. At this time, the target DMRS port indication table can be as follows Table 6 shows:

Value Number of DMRS CDM group(s)without data DMRS port(s) 0 2 0-2 1 2 3-5 2 2 2-4 3 2 5-7 4 2 0,2,4 5 2 1,3,5 6 2 2,4,6 7 2 3,5,7

Table 6

Scenario Seven:

Antenna port(s),PUSCH-tp=Disabled,

UL-DMRS-config-type=1, UL-DMRS-max-len=1, rank=4

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Disabled indicates that the data transmission waveform is CP-OFDM, and UL-DMRS-config-type=1 indicates that the DMRS configuration type is comb; UL-DMRS-max-len= 1 indicates that the maximum length of the DMRS symbol is 1, and rank=4 indicates that the channel rank number is 4.

The target DMRS pattern can be shown in Figure 4-7. The preset target DMRS ports are 0-3 corresponding to OFDM0 and 4-7 corresponding to OFDM1. At this time, the target DMRS port indication table can be as follows Table 7 shows:

Table 7

Scene Eight:

Antenna port(s),PUSCH-tp=Disabled,

UL-DMRS-config-type=1, UL-DMRS-max-len=2, rank=1

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Disabled indicates that the data transmission waveform is CP-OFDM, and UL-DMRS-config-type=1 indicates that the DMRS configuration type is comb; UL-DMRS-max-len= 2 indicates that the maximum length of the DMRS symbol is 2, and rank=1 indicates that the channel rank is 1.

The target DMRS pattern can be shown in Figure 10-13. The preset target DMRS ports are 0-7 corresponding to OFDM0 and OFDM1, and 8-15 corresponding to OFDM2 and OFDM3. At this time, the target DMRS port The indicator table can be as shown in Table 8:

Table 8

Scene Nine:

Antenna port(s),PUSCH-tp=Disabled,

UL-DMRS-config-type=1, UL-DMRS-max-len=4, rank=1

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Disabled indicates that the data transmission waveform is CP-OFDM, UL-DMRS-config-type=1 indicates that the DMRS configuration type is comb; UL-DMRS-max-len= 4 indicates that the maximum length of the DMRS symbol is 4, and rank=1 indicates that the channel rank number is 1.

The target DMRS pattern can be shown in Figure 10-13. The preset target DMRS ports are 0-7 corresponding to OFDM0 and OFDM1, and 8-15 corresponding to OFDM2 and OFDM3. At this time, the target DMRS port The indicator table can be as shown in Table 9:

Table 9

Scene ten:

Antenna port(s),PUSCH-tp=Disabled,

UL-DMRS-config-type=1, UL-DMRS-max-len=2, rank=2

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Disabled indicates that the data transmission waveform is CP-OFDM, and UL-DMRS-config-type=1 indicates that the DMRS configuration type is comb; UL-DMRS-max-len= 2 indicates that the maximum length of the DMRS symbol is 2, and rank=2 indicates that the channel rank is 2.

The target DMRS pattern can be shown in Figure 10-13. The preset target DMRS ports are 0-7 corresponding to OFDM0 and OFDM1, and 8-15 corresponding to OFDM2 and OFDM3. At this time, the target DMRS port The indicator table can be as shown in Table 10:

Table 10

Scene eleven:

Antenna port(s),PUSCH-tp=Disabled,

UL-DMRS-config-type=1, UL-DMRS-max-len=4, rank=2

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Disabled indicates that the data transmission waveform is CP-OFDM, and UL-DMRS-config-type=1 indicates that the DMRS configuration type is comb; UL-DMRS-max-len= 4 indicates that the maximum length of the DMRS symbol is 4, and rank=2 indicates that the channel rank is 2.

The target DMRS pattern can be shown in Figure 10-13. The preset target DMRS ports are 0-7 corresponding to OFDM0 and OFDM1, and 8-15 corresponding to OFDM2 and OFDM3. At this time, the target DMRS port The indicator table can be as shown in Table 11:

Table 11

Scene twelve:

Antenna port(s),PUSCH-tp=Disabled,

UL-DMRS-config-type=1, UL-DMRS-max-len=2, rank=3

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Disabled indicates that the data transmission waveform is CP-OFDM, and UL-DMRS-config-type=1 indicates that the DMRS configuration type is comb; UL-DMRS-max-len= 2 indicates that the maximum length of the DMRS symbol is 2, and rank=3 indicates that the channel rank number is 3.

The target DMRS pattern can be shown in Figure 10-13. The preset target DMRS ports are 0-7 corresponding to OFDM0 and OFDM1, and 8-15 corresponding to OFDM2 and OFDM3. At this time, the target DMRS port The indicator table can be as shown in Table 12:

Table 12

Scene Thirteen:

Antenna port(s),PUSCH-tp=Disabled,

UL-DMRS-config-type=1, UL-DMRS-max-len=4, rank=3

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Disabled indicates that the data transmission waveform is CP-OFDM, and UL-DMRS-config-type=1 indicates that the DMRS configuration type is comb; UL-DMRS-max-len= 4 indicates that the maximum length of the DMRS symbol is 4, and rank=3 indicates that the channel rank number is 3.

The target DMRS pattern can be shown in Figure 10-13. The preset target DMRS ports are 0-7 corresponding to OFDM0 and OFDM1, and 8-15 corresponding to OFDM2 and OFDM3. At this time, the target DMRS port The indicator table can be as shown in Table 13:

Table 13

Scene Fourteen:

Antenna port(s),PUSCH-tp=Disabled,

UL-DMRS-config-type=1, UL-DMRS-max-len=2, rank=4

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Disabled indicates that the data transmission waveform is CP-OFDM, and UL-DMRS-config-type=1 indicates that the DMRS configuration type is comb; UL-DMRS-max-len= 2 indicates that the maximum length of the DMRS symbol is 2, and rank=4 indicates that the channel rank number is 4.

The target DMRS pattern can be shown in 10-13. The preset target DMRS ports are 0-7 corresponding to OFDM0 and OFDM1, and 8-15 corresponding to OFDM2 and OFDM3. At this time, the target DMRS port indicates The table can be as shown in Table 14:

Table 14

Scene fifteen:

Antenna port(s),PUSCH-tp=Disabled,

UL-DMRS-config-type=1, UL-DMRS-max-len=4, rank=4

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Disabled indicates that the data transmission waveform is CP-OFDM, and UL-DMRS-config-type=1 indicates that the DMRS configuration type is comb; UL-DMRS-max-len= 4 indicates that the maximum length of the DMRS symbol is 4, and rank=4 indicates that the channel rank number is 4.

The target DMRS pattern can be shown in Figure 10-13. The preset target DMRS ports are 0-7 corresponding to OFDM0 and OFDM1, and 8-15 corresponding to OFDM2 and OFDM3. At this time, the target DMRS port The indicator table can be as shown in Table 15:

Table 15

Scene sixteen:

Antenna port(s),PUSCH-tp=Disabled,

UL-DMRS-config-type=2, UL-DMRS-max-len=1, rank=1

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Disabled means that the data transmission waveform is CP-OFDM, UL-DMRS-config-type=2 means that the DMRS configuration type is FDM; UL-DMRS-max-len=1 Indicates that the maximum length of the DMRS symbol is 1, and rank=1 indicates that the channel rank is 1.

The target DMRS pattern can be shown in Figure 20-25. It should be noted that since the maximum length of the DMRS is 1, in this embodiment, the DMRS only occupies 2 OFDM symbol bits (OFDM0 and OFDM1). The preset target DMRS The port number corresponding to OFDM0 is 0-5, and the port number corresponding to OFDM1 is 6-11. At this time, the target DMRS port indication table can be as shown in Table 16:

Table 16

Preferably, the number of CDM groups of the symbol where the DMRS is located can be flexibly configured to correspond to different user multiplexing numbers, as shown in Table 16.

Scene seventeen:

Antenna port(s),PUSCH-tp=Disabled,

UL-DMRS-config-type=2, UL-DMRS-max-len=1, rank=2

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Disabled means that the data transmission waveform is CP-OFDM, UL-DMRS-config-type=2 means that the DMRS configuration type is FDM; UL-DMRS-max-len=1 Indicates that the maximum length of the DMRS symbol is 1, and rank=2 indicates that the number of columns is 2.

The target DMRS pattern can be shown in Figure 20-25. It should be noted that since the maximum length of the DMRS is 1, in this embodiment, the DMRS only occupies 2 OFDM symbol bits (OFDM0 and OFDM1). The preset target DMRS The port number corresponding to OFDM0 is 0-5, and the port number corresponding to OFDM1 is 6-11. At this time, the target DMRS port indication table can be as shown in Table 17:

Value Number of DMRS CDM group(s)without data DMRS port(s) 0 1 0,1 1 2 0,1 2 2 2,3 3 3 0,1 4 3 2,3 5 3 4,5 6 2 0,2 7 2 0,3 8 1 6,7 9 2 6,7 10 2 8,9 11 3 6,7 12 3 8,9 13 3 10,11 14 2 6,8 15 2 6,9

Table 17

Preferably, the number of CDM groups of the symbol where the DMRS is located can be flexibly configured, corresponding to different user multiplexing numbers, as shown in Table 17.

Scene Eighteen:

Antenna port(s),PUSCH-tp=Disabled,

UL-DMRS-config-type=2, UL-DMRS-max-len=1, rank=3

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Disabled means that the data transmission waveform is CP-OFDM, UL-DMRS-config-type=2 means that the DMRS configuration type is FDM; UL-DMRS-max-len=1 Indicates that the maximum length of the DMRS symbol is 1, and rank=3 indicates that the channel rank number is 3.

The target DMRS pattern can be as described in step 1902. It should be noted that since the maximum length of the DMRS is 1, in this embodiment, the DMRS only occupies 2 OFDM symbol bits (OFDM0 and OFDM1). The preset target The ports of DMRS are 0-5 corresponding to OFDM0, and 6-11 corresponding to OFDM1. At this time, the target DMRS port indication table can be as shown in Table 18:

Value Number of DMRS CDM group(s)without data DMRS port(s) 0 2 0-2 1 3 0-2 2 3 3-5 3 2 6-8 4 3 6-8 5 3 9-11 6-15 Reserved

Table 18

Preferably, the number of CDM groups of the symbol where the DMRS is located can be flexibly configured, corresponding to different user multiplexing numbers, as shown in Table 18.

Scene Nineteen:

Antenna port(s),PUSCH-tp=Disabled,

UL-DMRS-config-type=2, UL-DMRS-max-len=1, rank=4

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Disabled means that the data transmission waveform is CP-OFDM, UL-DMRS-config-type=2 means that the DMRS configuration type is FDM; UL-DMRS-max-len=1 Indicates that the maximum length of the DMRS symbol is 1, and rank=4 indicates that the channel rank number is 4.

The target DMRS pattern can be as described in step 1902. It should be noted that since the maximum length of the DMRS is 1, in this embodiment, the DMRS only occupies 2 OFDM symbol bits (OFDM0 and OFDM1). The preset target The ports of DMRS are 0-5 corresponding to OFDM0, and 6-11 corresponding to OFDM1. At this time, the target DMRS port indication table can be as shown in Table 19:

Table 19

Preferably, the number of CDM groups of the symbol where the DMRS is located can be flexibly configured, corresponding to different user multiplexing numbers, as shown in Table 19.

Scene twenty:

Antenna port(s),PUSCH-tp=Disabled,

UL-DMRS-config-type=2, UL-DMRS-max-len=2, rank=1

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Disabled means that the data transmission waveform is CP-OFDM, UL-DMRS-config-type=2 means that the DMRS configuration type is FDM; UL-DMRS-max-len=2 Indicates that the maximum length of the DMRS symbol is 2, and rank=1 indicates that the channel rank is 1.

The target DMRS pattern can be as described in step 1902. The preset target DMRS ports are 0-11 corresponding to OFDM0 and OFDM1, and 12-23 corresponding to OFDM2 and OFDM3. At this time, the target DMRS The port indication table can be expressed as Table 20:

Table 20

Preferably, the number of CDM groups of the symbol where the DMRS is located can be flexibly configured to correspond to different user multiplexing numbers, as shown in Table 20.

Scene twenty one:

Antenna port(s),PUSCH-tp=Disabled,

UL-DMRS-config-type=2, UL-DMRS-max-len=2, rank=2

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Disabled means that the data transmission waveform is CP-OFDM, UL-DMRS-config-type=2 means that the DMRS configuration type is FDM; UL-DMRS-max-len=2 Indicates that the maximum length of the DMRS symbol is 2, and rank=2 indicates that the channel rank is 2.

The target DMRS pattern can be as described in step 1902. The preset target DMRS ports are 0-11 corresponding to OFDM0 and OFDM1, and 12-23 corresponding to OFDM2 and OFDM3. At this time, the target DMRS The port indication table can be as shown in Table 21:

Table 21

Preferably, the number of CDM groups of the symbol where the DMRS is located can be flexibly configured to correspond to different user multiplexing numbers, as shown in Table 21.

Scene twenty-two:

Antenna port(s),PUSCH-tp=Disabled,

UL-DMRS-config-type=2, UL-DMRS-max-len=2, rank=3

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Disabled means that the data transmission waveform is CP-OFDM, UL-DMRS-config-type=2 means that the DMRS configuration type is FDM; UL-DMRS-max-len=2 Indicates that the maximum length of the DMRS symbol is 2, and rank=3 indicates that the channel rank number is 3.

The target DMRS pattern can be as described in step 1902. The preset target DMRS ports are 0-11 corresponding to OFDM0 and OFDM1, and 12-23 corresponding to OFDM2 and OFDM3. At this time, the target DMRS The port indication table can be as shown in Table 22:

Table 22

Preferably, the number of CDM groups of the symbol where the DMRS is located can be flexibly configured, corresponding to different user multiplexing numbers, as shown in Table 22.

Scene twenty-three:

Antenna port(s),PUSCH-tp=Disabled,

UL-DMRS-config-type=2, UL-DMRS-max-len=2, rank=4

Among them, Antenna port(s) is the antenna port, PUSCH-tp=Disabled means that the data transmission waveform is CP-OFDM, UL-DMRS-config-type=2 means that the DMRS configuration type is FDM; UL-DMRS-max-len=2 Indicates that the maximum length of the DMRS symbol is 2, and rank=4 indicates that the channel rank is 4.

The target DMRS pattern can be as described in step 1902. The preset target DMRS ports are 0-11 corresponding to OFDM0 and OFDM1, and 12-23 corresponding to OFDM2 and OFDM3. At this time, the target DMRS The port indication table can be as shown in Table 23:

Table 23

Preferably, the number of CDM groups of the symbol where the DMRS is located can be flexibly configured, corresponding to different user multiplexing numbers, as shown in Table 23.

Step 102: Send DMRS indication information to the UE according to the target DMRS port indication table, so that the UE transmits data according to the DMRS indication information.

In this embodiment, the DMRS indication information is carried in the DL DCI, and the DMRS indication information may include information such as the DMRS port, the number of DMRS symbols, and the CDM group of the symbol where the DMRS is located.

According to the technical solution provided by the embodiment of the present invention, the number of target OFDM symbol bits is increased compared with the number of original OFDM symbol bits used by the original DMRS, so that the number of target DMRSpatterns generated according to the target OFDM symbol bits and the preset orthogonal mask OCC The number of target DMRS ports is also increased, thereby increasing the number of target DMRS ports, which solves the problem that the number of DMRSs in the prior art cannot meet the increasing number of user terminals. Since the number of DMRSs increases, the interference and collision of data transmitted by the user terminal using the NOMA technology are reduced.

As shown in FIG. 27, another embodiment of the present invention further provides a DMRS indication method, including:

Step 2701: Obtain a target DMRS port indication table corresponding to the target DMRS pattern, wherein the target DMRS pattern is obtained by reducing the density of DMRSs in the original DMRS pattern.

In order to enable those skilled in the art to more clearly understand the method for obtaining the target DMRPattern, a specific example will be described below in detail:

The configuration method of the target DMRS is comb, the comb is 2, and the length of the OCC is 4. The original DMRSpattern can be shown in Figure 28:

Decrease the density of DMRS in Figure 28 to obtain the target DMRSpattern as shown in Figure 29:

It should be noted that this embodiment does not limit the DMRS density. In the actual use process, those skilled in the art can select an appropriate DMRS density to generate a target DMRS pattern as required, which will not be repeated here.

Step 2702: Send DMRS indication information to the UE according to the target DMRS port indication table, so that the UE transmits data according to the DMRS indication information.

The technical solution provided by the embodiments of the present invention can expand the number of target DMRS patterns by reducing the density of DMRSs in the original DMRS pattern, thereby increasing the number of target DMRSs, and solving the problem that the number of DMRSs in the prior art cannot satisfy the increasing number of users the number of terminals. Since the number of DMRSs increases, the interference and collision of data transmitted by the user terminal using the NOMA technology are reduced.

As shown in FIG. 30 , an embodiment of the present invention further provides a DMRS indication device, including:

The first obtaining module 3001 is configured to obtain the target DMRS port indication table corresponding to the target DMRS pattern, wherein the target DMRS pattern is obtained by the second obtaining module 3002 according to the target OFDM symbol bits and the orthogonal mask OCC Obtain, the target OFDM symbol bits are composed of first OFDM symbol bits and second OFDM symbol bits, the first OFDM symbol bits are the original OFDM symbol bits used by the original DMRS, and the number of the second OFDM symbol bits is an integer multiple of the first OFDM symbol bits;

The sending module 3003 is configured to send DMRS indication information to the user terminal according to the target DMRS port indication table obtained by the first obtaining module 3001, so that the user terminal transmits data according to the DMRS indication information.

Further, if the configuration mode of the target DMRS is comb-like, and the maximum comb is 2, the length of the OCC is 2, and the number of the target OFDM symbol bits is 2, as shown in FIG. The second acquisition module 3002 includes:

The first acquisition sub-module 3101 selects one OFDM symbol bit from the target OFDM symbol bit as the first OFDM symbol bit to be used;

The second obtaining sub-module 3102 obtains the target DMRS pattern according to the configuration mode of the target DMRS, the OCC, and the first to-be-used OFDM obtained by the first obtaining sub-module 3101 .

Further, if the configuration of the target DMRS is comb-like, and the maximum comb is 2, the length of the OCC is 4, and the number of the target OFDM symbol bits is 4, as shown in FIG. The second acquisition module 3002 includes:

The third acquisition submodule 3201 is used to select two consecutive OFDM symbol bits from the target OFDM symbol bits as the second to-be-used OFDM symbol bits;

The fourth obtaining sub-module 3202 is configured to obtain the target DMRS pattern according to the configuration mode of the target DMRS, the OCC and the second to-be-used OFDM obtained by the third obtaining sub-module 3201 .

Further, if the configuration mode of the target DMRS is comb, and the maximum comb is 4, the length of the OCC is 4, and the number of the target OFDM symbol bits is 4, as shown in FIG. The second acquisition module 3002 includes:

The fifth acquisition sub-module 3301 is used to acquire all 4 OFDM symbol bits from the target OFDM symbol bits as the third to-be-used OFDM symbol bits

The sixth obtaining sub-module 3302 is configured to obtain the target DMRS pattern according to the configuration mode of the target DMRS, the OCC and the third to-be-used OFDM obtained by the fifth obtaining sub-module 3301 .

Further, if the configuration mode of the target DMRS is frequency division multiplexing FDM, the number of the target OFDM symbol bits is 2 or 4, and the length of the OCC is 2, as shown in FIG. 34 , the second The acquisition module 3002 includes:

The seventh obtaining sub-module 3401 is configured to select one OFDM symbol bit from the target OFDM symbol bits as the fourth to-be-used OFDM symbol bit if the number of the target OFDM symbol bits is 2, or, if the target OFDM symbol bit is The number of OFDM symbol bits is 4, and two consecutive OFDM symbol bits are selected from the target OFDM symbol bits as the fourth to-be-used OFDM symbol bit;

The eighth obtaining sub-module 3402 is configured to obtain the target DMRS pattern according to the configuration mode of the target DMRS, the OCC, and the fourth to-be-used OFDM obtained by the seventh obtaining sub-module 3401 .

For a specific implementation method of the DMRS indication device provided by the embodiment of the present invention, reference may be made to the description of the DMRS indication method provided by the embodiment of the present invention as shown in FIG. 1-29 , and details are not repeated here.

According to the technical solution provided by the embodiment of the present invention, the number of target OFDM symbol bits is increased compared with the number of original OFDM symbol bits used by the original DMRS, so that the number of target DMRSpatterns generated according to the target OFDM symbol bits and the preset orthogonal mask OCC The number of target DMRS ports is also increased, thereby increasing the number of target DMRS ports, which solves the problem that the number of DMRSs in the prior art cannot meet the increasing number of user terminals. As the number of DMRSs increases, the interference and collision of data transmitted by the user terminal using the NOMA technology are reduced.

Preferably, an embodiment of the present invention further provides a network device, including a processor, a memory, a computer program stored in the memory and running on the processor, and the computer program implements the above-mentioned DMRS instruction when executed by the processor Each process of the method embodiment can achieve the same technical effect, and to avoid repetition, it will not be repeated here.

Embodiments of the present invention further provide a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, implements each process of the above-mentioned DMRS indication method embodiment, and can achieve the same The technical effect, in order to avoid repetition, will not be repeated here. The computer-readable storage medium is, for example, a read-only memory (Read-Only Memory, ROM for short), a random access memory (Random Access Memory, RAM for short), a magnetic disk, or an optical disk.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

From the description of the above embodiments, those skilled in the art can clearly understand that the method of the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is better implementation. Based on this understanding, the technical solutions of the present invention can be embodied in the form of software products in essence or the parts that make contributions to the prior art, and the computer software products are stored in a storage medium (such as ROM/RAM, magnetic disk, CD), including several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present invention.

The embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of the present invention, without departing from the spirit of the present invention and the scope protected by the claims, many forms can be made, which all belong to the protection of the present invention.

Claims (7)

1. A method for indicating a DMRS, comprising:

acquiring a target DMRS port indication table corresponding to a target DMRS pattern, wherein the target DMRS pattern is obtained according to a target Orthogonal Frequency Division Multiplexing (OFDM) symbol bit and an orthogonal mask code (OCC), the target OFDM symbol bit is composed of a first OFDM symbol bit and a second OFDM symbol bit, the first OFDM symbol bit is an original OFDM symbol bit used by an original DMRS, and the number of the second OFDM symbol bit is an integral multiple of the first OFDM symbol bit;

sending DMRS indication information to a user terminal according to the target DMRS port indication table so that the user terminal transmits data according to the DMRS indication information;

if the configuration mode of the target DMRS is a comb shape, the maximum comb is 2, the length of the OCC is 4, the number of the target OFDM sign bits is 4, and the method for obtaining the target DMRS pattern comprises the following steps:

selecting two continuous OFDM sign bits from the target OFDM sign bits as second OFDM sign bits to be used;

obtaining the target DMRSpattern according to the configuration mode of the target DMRS, the OCC and the second OFDM to be used; or,

if the configuration mode of the target DMRS is a comb shape, the maximum comb is 4, the length of the OCC is 4, the number of the target OFDM sign bits is 4, and the method for obtaining the target DMRS pattern comprises the following steps:

acquiring all 4 OFDM sign bits from the target OFDM sign bits as third OFDM sign bits to be used;

obtaining the target DMRSpattern according to the configuration mode of the target DMRS, the OCC and the third OFDM to be used; or,

if the configuration mode of the target DMRS is FDM, the number of the target OFDM sign bits is 4, the length of the OCC is 2, and the method for obtaining the target DMRS pattern comprises the following steps:

selecting two continuous OFDM sign bits from the target OFDM sign bits as a fourth OFDM sign bit to be used;

and obtaining the target DMRSpattern according to the configuration mode of the target DMRS, the OCC and the fourth OFDM to be used.

2. The method of claim 1, wherein the number of the second OFDM symbol bits is the same as the number of the first OFDM symbol bits.

3. The method of claim 1, wherein the first OFDM symbol bit and the second OFDM symbol bit are adjacently located; or,

the first OFDM symbol bit and the second OFDM symbol bit are arranged at intervals.

4. The method of claim 1, wherein the target DMRS pattern is configured from more than two identical OCCs, and wherein orthogonal codes of each OCC are in different orders.

5. An apparatus for indicating a DMRS, comprising:

the device comprises a first obtaining module and a second obtaining module, wherein the first obtaining module is used for obtaining a target DMRS port indication table corresponding to a target DMRS pattern, the target DMRS pattern is obtained by the second obtaining module according to a target Orthogonal Frequency Division Multiplexing (OFDM) symbolic bit and an orthogonal mask code (OCC), the target OFDM symbolic bit is composed of a first OFDM symbolic bit and a second OFDM symbolic bit, the first OFDM symbolic bit is an original OFDM symbolic bit used by an original DMRS, and the number of the second OFDM symbolic bits is an integral multiple of the first OFDM symbolic bit;

a sending module, configured to send DMRS indication information to a user terminal according to the target DMRS port indication table obtained by the first obtaining module, so that the user terminal transmits data according to the DMRS indication information;

if the configuration mode of the target DMRS is a comb and the maximum comb is 2, the length of the OCC is 4, the number of target OFDM symbol bits is 4, and the second obtaining module includes:

a third obtaining submodule, configured to select two consecutive OFDM symbol bits from the target OFDM symbol bit as a second OFDM symbol bit to be used;

the fourth obtaining submodule is used for obtaining the target DMRS pattern according to the configuration mode of the target DMRS, the OCC and the second OFDM to be used obtained by the third obtaining submodule; or,

if the configuration mode of the target DMRS is a comb, and the maximum comb is 4, the length of the OCC is 4, the number of target OFDM symbol bits is 4, and the second obtaining module includes:

a fifth obtaining sub-module, configured to obtain all 4 OFDM symbol bits from the target OFDM symbol bit as a third OFDM symbol bit to be used;

a sixth obtaining sub-module, configured to obtain the target DMRS pattern according to the configuration mode of the target DMRS, the OCC, and a third OFDM to be used obtained by the fifth obtaining sub-module; or,

if the configuration mode of the target DMRS is frequency division multiplexing, FDM, the number of the target OFDM symbol bits is 4, the length of the OCC is 2, and the second obtaining module includes:

a seventh obtaining submodule, configured to select two consecutive OFDM symbol bits from the target OFDM symbol bit as a fourth OFDM symbol bit to be used;

and the eighth obtaining submodule is used for obtaining the target DMRS pattern according to the configuration mode of the target DMRS, the OCC and the fourth OFDM to be used obtained by the seventh obtaining submodule.

6. A network device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the method of indicating a DMRS as defined in any one of claims 1 to 4.

7. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when being executed by a processor, carries out the steps in the method of indicating a DMRS as defined in any one of claims 1 to 4.

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