CN112449413B

CN112449413B - Power indication method, power determination device, network equipment and terminal

Info

Publication number: CN112449413B
Application number: CN201910806669.2A
Authority: CN
Inventors: 倪吉庆; 邵泽才; 周伟; 边森; 王桂珍
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: 2019-08-29
Filing date: 2019-08-29
Publication date: 2023-05-09
Anticipated expiration: 2039-08-29
Also published as: CN112449413A

Abstract

The invention provides a power indication method, a power indication device, network side equipment and a terminal, wherein the power indication method comprises the following steps: transmitting Downlink Control Information (DCI) which is used for dynamically indicating the ratio of the first power to the second power; wherein, the first power is RE power of each resource element of a physical downlink shared channel PDSCH; the second power is power per RE of a demodulation reference signal (DMRS); therefore, the PDSCH power per RE and the DMRS power per RE can be more flexibly configured, and the performance of data transmission is improved.

Description

Power indication method, power determination device, network equipment and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a power indication method, a power indication determining device, a network side device and a terminal.

Background

In the prior art, a base station transmits a downlink shared data channel including a reference signal and a data channel, and the channel estimated based on the reference signal is used for data demodulation. The ratio of PDSCH (Physical Downlink Shared Channel ) per RE (Resource Element) power to DMRS (Demodulation Reference Signal ) per RE power is related to the number of DMRS CDM groups without data (code division multiplexing groups occupied by DMRS) as shown in table 1.

TABLE 1 ratio of PDSCH per RE Power to DMRS per RE Power

If the number of DMRS CDM groups without data is determined, the ratio of PDSCH power per RE to DM-RS power per RE is determined. Specifically, the number of DMRS CDM groups without data may be indicated by the DMRS port function indication field in DCI (Downlink Control Information ); as shown in table 2, the number of DMRS ports and the number of DMRS CDM groups(s) without data are dynamically indicated with 5 bits.

TABLE 2 DMRS type 2, symbol max 1

Currently, the ratio of PDSCH per RE power to DM-RS per RE power is tightly coupled to the number of DMRS CDM groups(s) withoutdata, i.e., the ratio of PDSCH per RE power to DM-RS per RE power is determined by the number of DMRS CDM groups(s) withoutdata, and is mainly used for supporting MU-MIMO (Multi-User Multiple-Input Multiple-Output) transparent transmission.

As can be seen from the combination of table 1 and table 2, when the DMRS port is 1, if the number of DMRS CDM groups(s) without data is 1, the PDSCH power per RE is the same as the DM-RS power per RE; if the number of DMRS CDM groups(s) without data is 2, PDSCH per RE power is half of DM-RS per RE power. Thus, if the power of DMRS per RE relative to PDSCH per RE is to be increased, additional DMRS CDM group(s) without data needs to be configured, i.e., additional time-frequency resources are occupied. The effect of this is that, although the power of DMRS per RE is increased relative to PDSCH per RE, the additional resources may result in a reduced code rate of data, and a loss of coding gain, so that the DMRS power increase cannot increase the performance of data transmission, especially for users at the cell edge.

In addition, when the number of DMRS ports is large, specifically, as shown in table 2, the DMRS type 2 can be configured to be 1 at maximum, and the number of DMRS ports is 5, at this time, one user needs to occupy 3 DMRS CDM groups, that is, the power of DMRS per RE relative to PDSCH per RE is three times fixed. Specifically, when the signal-to-noise ratio is high, in some scenarios, power loss may be caused by the power configured by the DMRS, and appropriate power adjustment may be considered.

In summary, the ratio of PDSCH per RE power to DM-RS per RE power is determined by the number of DMRS CDM groups(s) without data parameters, which cannot be adjusted according to the relevant scenario.

Disclosure of Invention

The embodiment of the invention aims to provide a power indication method, a power indication device, network side equipment and a terminal, so as to solve the problem that the ratio of PDSCH power per RE to DM-RS power per RE in the prior art cannot be adjusted according to related scenes.

In order to solve the above problems, an embodiment of the present invention provides a power indication method, applied to a network side device, including:

transmitting Downlink Control Information (DCI) which is used for dynamically indicating the ratio of the first power to the second power;

wherein, the first power is RE power of each resource element of a physical downlink shared channel PDSCH; the second power is the power per RE of the demodulation reference signal DMRS.

Wherein, the DCI comprises: a power ratio indication field for indicating a ratio of the first power to the second power.

Wherein, the DCI further includes: a DMRS port indication field, where the DMRS port indication field is used to indicate the number of DMRS ports and DMRS code division multiplexing CDM groups;

wherein the power ratio indication field and DMRS port indication field jointly indicate a ratio of the first power to the second power.

Wherein, the DCI comprises: and the DMRS port indication field is used for indicating the number of the DMRS ports and the DMRS CDM groups and the ratio of the first power to the second power.

The embodiment of the invention also provides a power determination method, which is applied to the terminal and comprises the following steps:

receiving Downlink Control Information (DCI) sent by network side equipment, wherein the DCI is used for dynamically indicating the ratio of first power to second power;

Wherein, the DCI further includes: a DMRS port indication field, where the DMRS port indication field is used to indicate the number of DMRS ports and DMRS CDM groups;

The embodiment of the invention also provides a power indicating device which is applied to the network side equipment and comprises:

a sending module, configured to send downlink control information DCI, where the DCI is configured to dynamically indicate a ratio of a first power to a second power;

The embodiment of the invention also provides a network side device, which comprises a processor and a transceiver, wherein the transceiver is used for receiving and transmitting data under the control of the processor, and the processor is used for executing the following operations:

The embodiment of the invention also provides network side equipment, which comprises a memory, a processor and a program stored in the memory and capable of running on the processor, wherein the processor realizes the power indication method when executing the program.

The embodiment of the invention also provides a power determining device, which is applied to the terminal and comprises:

a receiving module, configured to receive downlink control information DCI sent by a network side device, where the DCI is used to dynamically indicate a ratio of a first power to a second power;

The embodiment of the invention also provides a terminal, which comprises a processor and a transceiver, wherein the transceiver is used for receiving and transmitting data under the control of the processor, and the processor is used for executing the following operations:

The embodiment of the invention also provides a terminal which comprises a memory, a processor and a program stored in the memory and capable of running on the processor, wherein the processor realizes the power determination method when executing the program.

The embodiment of the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the power indication method described above; alternatively, the program when executed by a processor implements the steps in the power determination method as described above.

The technical scheme of the invention has at least the following beneficial effects:

in the power indication method, the determining method, the device, the network side equipment and the terminal provided by the embodiment of the invention, the ratio of the PDSCH per RE power to the DMRS per RE power is dynamically indicated through DCI, so that the PDSCH per RE power and the DMRS per RE power can be more flexibly configured, and the performance of data transmission is improved.

Drawings

Fig. 1 is a schematic diagram illustrating steps of a power indication method according to an embodiment of the present invention;

fig. 2 is a schematic diagram showing steps of a power determining method according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a power indicating device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a network side device according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a power determining device according to an embodiment of the present invention;

fig. 6 shows a schematic structural diagram of a terminal according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, an embodiment of the present invention provides a power indication method, which is applied to a network side device, and includes:

step 11, transmitting downlink control information DCI, where the DCI is used to dynamically indicate a ratio of a first power to a second power; wherein, the first power is RE power of each resource element of a physical downlink shared channel PDSCH; the second power is the power per RE of the demodulation reference signal DMRS.

The embodiment of the invention dynamically indicates the ratio of the power of PDSCH per RE to the power of DMRS per RE through DCI; for example, when the number of streams is large, the DMRS is fixed to transmit with large power, and the DMRS power can be reduced and the power loss can be reduced under the condition of considering the high signal-to-noise ratio; for another example, when the channel change is faster, the DMSR power is properly improved, and the performance of data transmission is improved; therefore, the DMRS power can be improved, additional DMRS CDM groups are not occupied, and coverage enhancement of cell edge users is realized.

As an alternative embodiment, the DCI includes: a power ratio indication field for indicating a ratio of the first power to the second power.

And a functional domain (namely a power ratio indication domain) is added in the DCI, so that dynamic indication of the ratio of PDSCH per RE power to DMRS per RE power is realized.

Optionally, the ratio of the first power to the second power is independently configured by the power ratio indicator field. That is, the conventional method of determining the ratio of PDSCH per RE power to DMRS per RE power according to the number of DMRS CDM groups(s) without data is no longer applicable, i.e., table 1 is no longer valid at this time. Specifically, for example, the power ratio indicates that the domain occupies 2 bits and has a value of 2. The ratio was determined to be-1.76 dB by table 3. It is finally determined that the ratio of PDSCH per RE to DMRS per RE power is-1.76 dB. The number of DMRS CDM groups specifically occupied is as follows: DMRS port indication field determination.

Table 3 power ratio indicates the ratio of the domain configuration (2 bits)

Optionally, the DCI further includes: a DMRS port indication field, where the DMRS port indication field is used to indicate the number of DMRS ports and DMRS code division multiplexing CDM groups;

In other words, the number of DMRS CDM groups indicated by the power ratio indication field and the DMRS port indication field jointly indicates the ratio of PDSCH per RE power to DMRS per RE power.

For example, if the DMRS port in the DCI indicates a field, it occupies 5 bits and has a value of 0, and the newly added power ratio indicates that the field occupies 2 bits and has a value of 3. As can be seen from table 2, the DMRS port index is 0, i.e. the number of DMRS CDM groups(s) withoutdata is 1, and the ratio of PDSCH per RE power to DM-RS per RE power, which is preliminarily determined according to the number of DMRS CDM groups(s) withoutdata, is 0dB; and then, according to the power ratio indication domain, the ratio of PDSCH power per RE to DMRS power per RE determined in the table 3 is-3 dB. The terminal finally determines that the ratio of PDSCH per RE power to DM-RS per RE power is-3 dB and occupies only one DMRS CDM group. This approach considers the parameter values of DMRS CDM group(s) without data.

Optionally, the method for dynamically indicating the power ratio provided by the embodiment of the present invention is applicable to the case when the number of DMRS CDM groups(s) without data is 1. When the number of DMRS CDM groups(s) without data is 2 or 3, the method is not applicable any more. When the number of the DMRS CDM groups(s) is 1, the ratio of the PDSCH power per RE to the DMRS power per RE is initially determined to be 1, and then the ratio of the PDSCH power per RE to the DM-RS power per RE can be dynamically determined through a power ratio indication domain.

As another alternative embodiment, the DCI includes: and the DMRS port indication field is used for indicating the number of the DMRS ports and the DMRS CDM groups and the ratio of the first power to the second power.

In other words, the existing dynamic indication field (i.e., DMRS port indication field) is multiplexed to realize dynamic indication of the ratio of PDSCH per RE power to DMRS per RE power.

For example, as shown in table 2, when two codewords are configured, the DMRS port is 5 or 6, occupying 3 DMRS CDM groups. At present, only 2 values of the DMRS port indication domain are occupied, and the multiplexing reserved value is considered to realize dynamic configuration of the power ratio, as shown in table 4. Table 4 is a ratio of PDSCH per RE power to DM-RS per RE power for implementing dynamic indication independent configuration according to DMRS port indication field.

Table 4 multiplexing DMRS port indication field to achieve dynamic indication of ratio of first power to second power

The ratio of PDSCH power per RE to DM-RS power per RE ranges from [ -4.77,0, -1.76, -3] as shown in Table 4.

In summary, in the above embodiment of the present invention, the ratio of PDSCH per RE power to DMRS per RE power is dynamically indicated through DCI, so that the ratio of PDSCH per RE power to DMRS per RE power may be more flexibly configured, thereby improving the performance of data transmission.

As shown in fig. 2, an embodiment of the present invention further provides a power determining method, which is applied to a terminal, including:

step 21, receiving downlink control information DCI sent by a network side device, where the DCI is used to dynamically indicate a ratio of a first power to a second power;

Optionally, the DCI further includes: a DMRS port indication field, where the DMRS port indication field is used to indicate the number of DMRS ports and DMRS CDM groups;

For example, as shown in table 2, when two codewords are configured, the DMRS port is 5 or 6, occupying 3 DMRS CDM groups. At present, only 2 values of the DMRS port indication domain are occupied, and the multiplexing reserved value is considered to realize dynamic configuration of the power ratio, as shown in table 4. Table 4 is a ratio of PDSCH per RE power to DM-RS per RE power for implementing dynamic indication independent configuration according to DMRS port indication field. The ratio of PDSCH power per RE to DM-RS power per RE ranges from [ -4.77,0, -1.76, -3] as shown in Table 4.

In summary, in the above embodiment of the present invention, the ratio of PDSCH per RE power to DMRS per RE power is dynamically indicated through DCI, so that PDSCH per RE power and DMRS per RE power can be more flexibly configured, thereby improving the performance of data transmission.

As shown in fig. 3, an embodiment of the present invention further provides a power indication apparatus, which is applied to a network side device, including:

a transmitting module 31, configured to transmit downlink control information DCI, where the DCI is configured to dynamically indicate a ratio of the first power to the second power;

Optionally, in the foregoing embodiment of the present invention, the DCI includes: a power ratio indication field for indicating a ratio of the first power to the second power.

Optionally, in the foregoing embodiment of the present invention, the DCI further includes: a DMRS port indication field, where the DMRS port indication field is used to indicate the number of DMRS ports and DMRS CDM groups;

Optionally, in the foregoing embodiment of the present invention, the DCI includes: and the DMRS port indication field is used for indicating the number of the DMRS ports and the DMRS CDM groups and the ratio of the first power to the second power.

It should be noted that, the power indication device provided in the embodiment of the present invention is a device capable of executing the power indication method, and all embodiments of the power indication method are applicable to the device, and the same or similar beneficial effects can be achieved.

As shown in fig. 4, the embodiment of the present invention further provides a network side device, including a processor 400 and a transceiver 410, where the transceiver 410 receives and transmits data under the control of the processor 400, and the processor 400 is configured to perform the following operations:

Optionally, in the foregoing embodiment of the present invention, the DCI further includes: a DMRS port indication field, where the DMRS port indication field is used to indicate the number of DMRS ports and DMRS code division multiplexing CDM groups;

It should be noted that, if the network side device provided in the embodiment of the present invention is a network side device capable of executing the power indication method, all embodiments of the power indication method are applicable to the network side device, and the same or similar beneficial effects can be achieved.

The embodiment of the invention also provides a network side device, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes each process in the power indication method embodiment as described above when executing the program, and can achieve the same technical effect, and the repetition is avoided, and the description is omitted here.

The embodiment of the present invention further provides a computer readable storage medium, on which a computer program is stored, where the program when executed by a processor implements each process in the embodiment of the power indication method described above, and the same technical effects can be achieved, and for avoiding repetition, a detailed description is omitted herein. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.

As shown in fig. 5, an embodiment of the present invention further provides a power determining apparatus, which is applied to a terminal, including:

a receiving module 51, configured to receive downlink control information DCI sent by a network side device, where the DCI is used to dynamically indicate a ratio of a first power to a second power;

It should be noted that, the power determining device provided in the embodiment of the present invention is a device capable of executing the power determining method, and all embodiments of the power determining method are applicable to the device, and the same or similar beneficial effects can be achieved.

As shown in fig. 6, an embodiment of the present invention further provides a terminal including a processor 600 and a transceiver 610, the terminal further including a user interface 620, the transceiver 610 receiving and transmitting data under the control of the processor 600, the processor 600 being configured to:

It should be noted that, if the terminal provided in the embodiment of the present invention is a terminal capable of executing the above-mentioned power determining method, all embodiments of the above-mentioned power determining method are applicable to the terminal, and the same or similar beneficial effects can be achieved.

The embodiment of the invention also provides a terminal, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes each process in the embodiment of the power determination method as described above when executing the program, and can achieve the same technical effect, and the repetition is avoided, and the description is omitted here.

The embodiment of the present invention further provides a computer readable storage medium, on which a computer program is stored, where the program when executed by a processor implements each process in the embodiment of the power determining method described above, and the same technical effects can be achieved, and for avoiding repetition, a detailed description is omitted herein. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-readable storage media (including, but not limited to, magnetic disk storage and optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block or blocks.

These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.

Claims

1. The power indication method is applied to the network side equipment and is characterized by comprising the following steps:

2. The method of claim 1, wherein the DCI comprises: a power ratio indication field for indicating a ratio of the first power to the second power.

3. The method of claim 2, wherein the DCI further comprises: a DMRS port indication field, where the DMRS port indication field is used to indicate the number of DMRS ports and DMRS code division multiplexing CDM groups;

4. The method of claim 1, wherein the DCI comprises: and the DMRS port indication field is used for indicating the number of the DMRS ports and the DMRS CDM groups and the ratio of the first power to the second power.

5. A power determining method applied to a terminal, comprising:

6. The method of claim 5, wherein the DCI comprises: a power ratio indication field for indicating a ratio of the first power to the second power.

7. The method of claim 6, wherein the step of providing the first layer comprises,

the DCI further includes: a DMRS port indication field, where the DMRS port indication field is used to indicate the number of DMRS ports and DMRS CDM groups;

8. The method of claim 5, wherein the DCI comprises: and the DMRS port indication field is used for indicating the number of the DMRS ports and the DMRS CDM groups and the ratio of the first power to the second power.

9. A power indication apparatus applied to a network side device, comprising:

10. A network side device comprising a processor and a transceiver, the transceiver receiving and transmitting data under control of the processor, the processor being configured to:

11. The network-side device of claim 10, wherein the DCI comprises: a power ratio indication field for indicating a ratio of the first power to the second power.

12. The network-side device of claim 11, wherein the DCI further comprises: a DMRS port indication field, where the DMRS port indication field is used to indicate the number of DMRS ports and DMRS code division multiplexing CDM groups;

13. The network-side device of claim 10, wherein the DCI comprises: and the DMRS port indication field is used for indicating the number of the DMRS ports and the DMRS CDM groups and the ratio of the first power to the second power.

14. A network side device comprising a memory, a processor, and a program stored on the memory and executable on the processor; the power indication method according to any of claims 1-4, characterized in that the processor implements the power indication method when executing the program.

15. A power determining apparatus, applied to a terminal, comprising:

16. A terminal comprising a processor and a transceiver, the transceiver receiving and transmitting data under the control of the processor, the processor being configured to:

17. The terminal of claim 16, wherein the DCI comprises: a power ratio indication field for indicating a ratio of the first power to the second power.

18. The terminal of claim 17, wherein the DCI further comprises: a DMRS port indication field, where the DMRS port indication field is used to indicate the number of DMRS ports and DMRS CDM groups;

19. The terminal of claim 16, wherein the DCI comprises: and the DMRS port indication field is used for indicating the number of the DMRS ports and the DMRS CDM groups and the ratio of the first power to the second power.

20. A terminal comprising a memory, a processor and a program stored on the memory and executable on the processor; the power determining method according to any of claims 5-8, characterized in that the processor implements the power determining method when executing the program.

21. A computer readable storage medium having stored thereon a computer program, which when executed by a processor performs the steps of the power indication method according to any of claims 1-4; alternatively, the program when executed by a processor implements the steps of the power determination method according to any of claims 5-8.