CN109275182B

CN109275182B - Notification method and device of downlink power distribution parameters

Info

Publication number: CN109275182B
Application number: CN201811162217.7A
Authority: CN
Inventors: 任晓涛; 周永行; 薛丽霞; 孙静原
Original assignee: Huawei Technologies Co Ltd
Current assignee: Beijing Jingshi Intellectual Property Management Co ltd
Priority date: 2013-06-14
Filing date: 2013-06-14
Publication date: 2021-10-01
Anticipated expiration: 2033-06-14
Also published as: CN109348530A; CN104429123A; CN104429123B; CN109151971A; CN109348530B; WO2014198067A1; CN109275182A; CN109151971B

Abstract

The invention discloses a method and a device for notifying downlink power distribution parameters, which relate to the technical field of communication and can reduce the interference of reference signals among cells so as to improve the spectrum efficiency of a system. The method comprises the steps that a frequency band specific downlink power distribution parameter is sent to a terminal, so that the terminal can obtain channel state information according to the frequency band specific downlink power distribution parameter, the frequency band specific downlink power distribution parameter comprises N parameters, the N parameters respectively correspond to N frequency bands, and N is greater than or equal to 2; and receiving the channel state information sent by the terminal. The scheme provided by the embodiment of the invention is suitable for being adopted when the downlink power distribution parameters are informed.

Description

Notification method and device of downlink power distribution parameters

The application is a divisional application of patent applications filed on 3.12.2013, and having an application number of 201380001455.9 and a name of "a method and an apparatus for notifying downlink power allocation parameters".

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for notifying a downlink power allocation parameter.

Background

In the existing LTE system, a base station measures a Channel State by issuing Reference signals to a terminal, wherein the Reference signals include a Common Reference Signal (CRS) and a Channel State Information Reference Signal (CSI-RS). And the terminal compares the CRS or the CSI-RS which is actually received and attenuated by the wireless channel with the original CRS or the CSI-RS so as to obtain the channel state information.

However, when the base station issues the CRS or the CSI-RS to the terminal, since the transmission power of the CRS or the CSI-RS in the entire system bandwidth is constant, that is, there is only one downlink power allocation parameter for the existing full frequency band, and the transmission power of the CRS or the CSI-RS does not change with the change of the frequency band, a stronger inter-cell reference signal interference occurs between the CRS or the CSI-RS between cells, thereby reducing the spectrum efficiency of the system.

Disclosure of Invention

Embodiments of the present invention provide a method and an apparatus for notifying a downlink power allocation parameter, which can reduce interference of a reference signal between cells, thereby improving spectrum efficiency of a system.

In a first aspect, an embodiment of the present invention provides a method for notifying a downlink power allocation parameter, including:

sending a frequency band-specific downlink power allocation parameter to a terminal so that the terminal can obtain channel state information according to the frequency band-specific downlink power allocation parameter, wherein the frequency band-specific downlink power allocation parameter comprises N parameters, the N parameters respectively correspond to N frequency bands, and N is greater than or equal to 2;

and receiving the channel state information sent by the terminal.

In a first possible embodiment, in combination with the first aspect,

the N parameters are first type parameters;

the first type parameter is a first ratio parameter, and the first ratio parameter is EPRE_PDSCHAnd EPRE_CRSThe EPRE_PDSCHIndicating physical downlink shared informationEnergy on PDSCH resource elements, the EPRE_CRSRepresenting the energy on common reference signal, CRS, resource elements; or the first type parameter is a second ratio parameter, and the second ratio parameter is EPRE_PDSCHAnd EPRE_CSI-RSThe EPRE_CSI-RSRepresenting the energy on the channel state information reference signal, CSI-RS, resource elements.

In a second possible implementation manner, with reference to the first possible implementation manner of the first aspect, the N parameters include the first type of parameter and the second type of parameter;

the second type of parameter is the ratio of the first type of parameter on a first frequency band to the first type of parameter on a second frequency band; or the second type of parameter is a ratio of the first ratio parameter on a first frequency band to the first ratio parameter on a second frequency band or the second ratio parameter on the second frequency band; or, the second type parameter is a ratio of the second ratio parameter on the first frequency band to the first ratio parameter on the second frequency band or the second ratio parameter on the second frequency band; or, the third type parameter is a ratio of the first type parameter on the first frequency band to the first ratio parameter or the second ratio parameter on the second frequency band;

the first frequency band and the second frequency band are any two frequency bands of the N different frequency bands.

In a third possible implementation manner, with reference to the first aspect or with reference to the second possible implementation manner of the first aspect, any two frequency bands of the N frequency bands may partially overlap or do not overlap in the frequency domain.

In a fourth possible embodiment, in combination with the first aspect or with the third possible embodiment of the first aspect,

each frequency band in the N frequency bands occupies partial bandwidth or partial physical resource block of a carrier when a base station transmits a reference signal; alternatively, the first and second electrodes may be,

each frequency band in the N frequency bands occupies the whole bandwidth of the carrier when the base station transmits the reference signal;

the reference signal is CRS or CSI-RS.

In a fifth possible implementation manner, with reference to any one of the possible implementation manners of the first aspect, the sending, to the terminal, the frequency band-specific downlink power allocation parameter includes:

and sending a radio resource control protocol (RRC) signaling to a terminal, wherein the RRC signaling comprises the frequency band specific downlink power allocation parameters.

In a sixth possible implementation manner, with reference to any one of the possible implementation manners of the first aspect, after the sending a band-specific downlink power allocation parameter to a terminal, before the receiving the channel state information sent by the terminal, the method further includes:

transmitting a reference signal to the terminal on the N frequency bands, wherein the transmission power of the reference signal transmitted on each of the N frequency bands corresponds to the band-specific downlink power allocation parameter of each frequency band, and the reference signal comprises a CRS or a CSI-RS.

In a second aspect, an embodiment of the present invention provides a method for notifying a downlink power allocation parameter, including:

receiving a frequency band-specific downlink power allocation parameter sent by a base station, wherein the frequency band-specific downlink power allocation parameter comprises N parameters, the N parameters respectively correspond to N frequency bands, and N is greater than or equal to 2;

acquiring channel state information according to the frequency band specific downlink power distribution parameters;

and sending the channel state information to the base station.

In a first possible embodiment, in combination with the second aspect,

the N parameters are first type parameters;

the first type parameter is a first ratio parameter, and the first ratio parameter is EPRE_PDSCHAnd EPRE_CRSThe EPRE_PDSCHRepresenting the energy on the PDSCH resource element of the physical downlink shared channel, the EPRE_CRSRepresenting energy on common reference signal CRS resource elements(ii) a Or the first type parameter is a second ratio parameter, and the second ratio parameter is EPRE_PDSCHAnd EPRE_CSI-RSThe EPRE_CSI-RSRepresenting the energy on the channel state information reference signal, CSI-RS, resource elements.

In a second possible embodiment, in combination with the first possible embodiment of the second aspect,

the N parameters comprise the first type parameters and the second type parameters;

In a third possible implementation manner, with reference to the first possible implementation manner of the second aspect, after receiving at least two frequency band-specific downlink power allocation parameters transmitted by the base station, the method further includes:

receiving reference signals transmitted by the base station on the N frequency bands, wherein the reference signals comprise Common Reference Signals (CRSs) or channel state information reference signals (CSI-RSs);

acquiring initial channel state information according to the reference signal;

the obtaining of the channel state information according to the downlink power allocation parameter includes:

and adjusting the initial channel state information according to the first ratio parameter or the second ratio parameter to obtain the adjusted channel state information.

In a fourth possible implementation manner, with reference to the second possible implementation manner of the second aspect, after receiving the band-specific downlink power allocation parameter sent by the base station, the method further includes:

acquiring initial channel state information according to the reference signal;

calculating to obtain the first ratio parameter or the second ratio parameter according to the second type of parameters;

In a fifth possible embodiment, in combination with the second aspect or with the second possible embodiment of the second aspect,

any two frequency bands of the N frequency bands are partially overlapped or not overlapped on the frequency domain.

In a sixth possible embodiment, in combination with the fifth possible embodiment of the second aspect,

each frequency band in the N frequency bands occupies partial bandwidth or partial physical resource blocks of a carrier when the base station transmits a reference signal; alternatively, the first and second electrodes may be,

each of the N frequency bands occupies the entire bandwidth of a carrier when the base station transmits a reference signal;

the reference signal is CRS or CSI-RS.

In a seventh possible implementation manner, with reference to any one of the second possible implementation manners of the second aspect, the receiving a frequency band-specific downlink power allocation parameter sent by a base station includes:

and receiving a radio resource control protocol (RRC) signaling sent by a base station, wherein the RRC signaling comprises the frequency band specific downlink power allocation parameters.

In a third aspect, an embodiment of the present invention provides an apparatus for notifying a downlink power allocation parameter, including:

a sending unit, configured to send a frequency band-specific downlink power allocation parameter to a terminal, so that the terminal obtains channel state information according to the frequency band-specific downlink power allocation parameter, where the frequency band-specific downlink power allocation parameter includes N parameters, the N parameters respectively correspond to N frequency bands, and N is greater than or equal to 2;

a receiving unit, configured to receive the channel state information sent by the terminal.

In a first possible embodiment, in combination with the third aspect,

the N parameters in the frequency band-specific downlink power allocation parameters sent by the sending unit are first-class parameters;

the first type parameter is a first ratio parameter, and the first ratio parameter is EPRE_PDSCHAnd EPRE_CRSThe EPRE_PDSCHRepresenting the energy on the PDSCH resource element of the physical downlink shared channel, the EPRE_CRSRepresenting the energy on common reference signal, CRS, resource elements; or the first type parameter is a second ratio parameter, and the second ratio parameter is EPRE_PDSCHAnd EPRE_CSI-RSThe EPRE_CSI-RSRepresenting the energy on the channel state information reference signal, CSI-RS, resource elements.

In a second possible implementation manner, with reference to the first possible implementation manner of the third aspect, the N parameters in the frequency band-specific downlink power allocation parameters sent by the sending unit include the first type of parameter and the second type of parameter;

In a third possible implementation manner, with reference to the third aspect or with reference to the second possible implementation manner of the third aspect, any two frequency bands of the N frequency bands in the frequency band-specific downlink power allocation parameter transmitted by the transmitting unit partially overlap or do not overlap in a frequency domain.

In a fourth possible embodiment, in combination with the third aspect or with the third possible embodiment of the third aspect,

each frequency band in the N frequency bands in the frequency band-specific downlink power allocation parameter sent by the sending unit occupies a part of bandwidth or a part of physical resource block of a carrier when a base station transmits a reference signal; alternatively, the first and second electrodes may be,

each frequency band in the N frequency bands in the frequency band-specific downlink power allocation parameter sent by the sending unit occupies the entire bandwidth of a carrier when a base station transmits a reference signal;

the reference signal is CRS or CSI-RS.

In a fifth possible implementation manner, with reference to any one of the possible implementation manners of the third aspect, the sending unit is configured to:

In a sixth possible implementation manner, with reference to any one of the possible implementation manners of the third aspect, the sending unit is further configured to:

In a fourth aspect, an embodiment of the present invention provides a base station, including:

a memory for storing information including program routines;

a processor, coupled to the memory, the transmitter and the receiver, for controlling execution of the program routines;

a transmitter, configured to transmit a frequency band-specific downlink power allocation parameter to a terminal, so that the terminal obtains channel state information according to the frequency band-specific downlink power allocation parameter, where the frequency band-specific downlink power allocation parameter includes N parameters, the N parameters respectively correspond to N frequency bands, and N is greater than or equal to 2;

and the receiver is used for receiving the channel state information sent by the terminal.

In a first possible embodiment, in combination with the fourth aspect,

the N parameters of the band-specific downlink power allocation parameters sent by the transmitter are first-class parameters;

In a second possible implementation manner, with reference to the first possible implementation manner of the fourth aspect, the N parameters of the band-specific downlink power allocation parameters transmitted by the transmitter include the first type of parameter and the second type of parameter;

In a third possible embodiment, in combination with the fourth aspect or with the second possible embodiment of the fourth aspect,

any two frequency bands of the N frequency bands in the frequency band-specific downlink power allocation parameters transmitted by the transmitter may partially overlap or not overlap in the frequency domain.

In a fourth possible embodiment, in combination with the fourth aspect or with the third possible embodiment of the fourth aspect,

each frequency band in the N frequency bands in the frequency band-specific downlink power allocation parameter sent by the sender occupies a part of bandwidth or a part of physical resource block of a carrier when a base station transmits a reference signal; alternatively, the first and second electrodes may be,

each frequency band in the N frequency bands in the frequency band-specific downlink power allocation parameters sent by the sender occupies the whole bandwidth of a carrier when a base station transmits a reference signal;

the reference signal is CRS or CSI-RS.

In a fifth possible implementation manner, with reference to any one of the possible implementation manners of the fourth aspect, the transmitter is configured to:

In a sixth possible implementation manner, in combination with any one of the possible implementation manners of the fourth aspect, the transmitter is further configured to:

In a fifth aspect, an embodiment of the present invention provides an apparatus for notifying a downlink power allocation parameter, including:

a receiving unit, configured to receive a frequency band-specific downlink power allocation parameter sent by a base station, where the frequency band-specific downlink power allocation parameter includes N parameters, the N parameters respectively correspond to N frequency bands, and N is greater than or equal to 2;

an obtaining unit, configured to obtain channel state information according to the band-specific downlink power allocation parameter received by the receiving unit;

a sending unit, configured to send the channel state information obtained by the obtaining unit to the base station.

In a first possible embodiment, in combination with the fifth aspect,

the N parameters in the band-specific downlink power allocation parameters received by the receiving unit are first-class parameters;

In a second possible implementation manner, with reference to the first possible implementation manner of the fifth aspect, the N parameters of the band-specific downlink power allocation parameters received by the receiving unit include the first type of parameter and the second type of parameter;

In a third possible embodiment, in combination with the second possible embodiment of the fifth aspect,

the receiving unit is further configured to receive, on the N frequency bands, reference signals transmitted by the base station, where the reference signals include a common reference signal CRS or a channel state information reference signal CSI-RS;

the obtaining unit is further configured to obtain initial channel state information according to the reference signal;

the obtaining unit is configured to adjust the initial channel state information according to the first ratio parameter or the second ratio parameter, and obtain the adjusted channel state information.

In a fourth possible implementation manner, with reference to the third possible implementation manner of the fifth aspect, the first obtaining module is configured to:

the obtaining unit includes:

a first obtaining module, configured to obtain the first ratio parameter or the second ratio parameter according to the second type of parameter;

a second obtaining module, configured to adjust the initial channel state information according to the first ratio parameter or the second ratio parameter, and obtain the adjusted channel state information.

In a fifth possible embodiment, in combination with the fifth aspect or with the second possible embodiment of the fifth aspect,

any two frequency bands of the N frequency bands in the frequency band-specific downlink power allocation parameters received by the receiving unit partially overlap or do not overlap in the frequency domain.

In a sixth possible embodiment, in combination with the fifth aspect or with the fifth possible embodiment of the fifth aspect,

each frequency band in the N frequency bands in the frequency band-specific downlink power allocation parameters received by the receiving unit occupies a part of bandwidth or a part of physical resource blocks of a carrier when the base station transmits a reference signal; alternatively, the first and second electrodes may be,

each frequency band in the N frequency bands in the frequency band-specific downlink power allocation parameters received by the receiving unit occupies the entire bandwidth of a carrier when the base station transmits a reference signal;

the reference signal is CRS or CSI-RS.

In a seventh possible implementation manner, with reference to any one of the possible implementation manners of the fifth aspect, the receiving unit is configured to:

In a sixth aspect, an embodiment of the present invention provides a terminal, including:

a receiver, configured to receive a band-specific downlink power allocation parameter sent by a base station, where the band-specific downlink power allocation parameter includes N parameters, where the N parameters respectively correspond to N frequency bands, and N is greater than or equal to 2;

a memory for storing information including program routines;

a processor, coupled to the memory, the transmitter and the receiver, for controlling execution of the program routines, in particular for: acquiring channel state information according to the frequency band-specific downlink power distribution parameters received by the receiver;

a transmitter for transmitting the channel state information obtained by the processor to the base station.

In a first possible embodiment, in combination with the sixth aspect,

the N parameters of the band-specific downlink power allocation parameters received by the receiver are first-class parameters;

In a second possible embodiment, in combination with the first possible embodiment of the sixth aspect,

the N parameters of the band-specific downlink power allocation parameters received by the receiver include a first type of parameter and a second type of parameter;

In a third possible embodiment, in combination with the first possible embodiment of the sixth aspect,

the receiver is further configured to receive, over the N frequency bands, reference signals transmitted by the base station, where the reference signals include a Common Reference Signal (CRS) or a channel state information reference signal (CSI-RS);

the processor is further configured to obtain initial channel state information according to the reference signal;

the processor is configured to:

In a fourth possible implementation manner, with reference to the second possible implementation manner of the sixth aspect, the receiver is further configured to receive, on the N frequency bands, reference signals transmitted by the base station, where the reference signals include a common reference signal CRS or a channel state information reference signal CSI-RS;

the processor is configured to:

In a fifth possible embodiment, in combination with the sixth aspect or with the second possible embodiment of the sixth aspect,

any two frequency bands of the N frequency bands in the frequency band-specific downlink power allocation parameters received by the receiver may partially overlap or may not overlap in the frequency domain.

In a sixth possible embodiment, in combination with the sixth aspect or with the fifth possible embodiment of the sixth aspect,

each frequency band in the N frequency bands in the frequency band-specific downlink power allocation parameters received by the receiver occupies a part of a bandwidth or a part of physical resource blocks of a carrier when the base station transmits a reference signal; alternatively, the first and second electrodes may be,

each of the N frequency bands in the frequency band-specific downlink power allocation parameters received by the receiver occupies the entire bandwidth of a carrier when the base station transmits a reference signal;

the reference signal is CRS or CSI-RS.

In a seventh possible embodiment, in combination with any one of the possible embodiments of the sixth aspect, the receiver is configured to:

The embodiment of the invention provides a method for notifying downlink power distribution parameters, which is characterized in that a frequency band specific downlink power distribution parameter is sent to a terminal, so that the terminal can obtain channel state information according to the frequency band specific downlink power distribution parameter, the frequency band specific downlink power distribution parameter comprises N parameters, the N parameters respectively correspond to N frequency bands, and N is greater than or equal to 2; and receiving the channel state information sent by the terminal. Compared with the prior art that the transmission power of the CRS or the CSI-RS in the whole system bandwidth is constant, namely only one downlink power allocation parameter exists for the existing full frequency band, and the transmission power of the CRS or the CSI-RS does not change along with the change of the frequency band, so that stronger inter-cell reference signal interference occurs between the CRS or the CSI-RS between cells, and the frequency spectrum efficiency of the system is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a flowchart of a method for notifying a downlink power allocation parameter according to an embodiment of the present invention;

FIG. 2 is a diagram illustrating cells within a service area of a base station according to an embodiment of the present invention;

fig. 3A is a schematic diagram illustrating a relationship between a frequency band of a class a cell and a transmission power of a reference signal according to an embodiment of the present invention;

fig. 3B is a schematic diagram illustrating a relationship between a frequency band of a class B cell and a transmission power of a reference signal according to an embodiment of the present invention;

fig. 3C is a schematic diagram illustrating a relationship between a frequency band of a class C cell and a transmission power of a reference signal according to an embodiment of the present invention;

fig. 4 is a flowchart of a method for notifying a downlink power allocation parameter according to another embodiment of the present invention;

fig. 5 is a flowchart of another notification method of downlink power allocation parameters according to another embodiment of the present invention;

fig. 6 is a block diagram of an apparatus for notifying a downlink power allocation parameter according to another embodiment of the present invention;

fig. 7 is a block diagram of a base station according to another embodiment of the present invention;

fig. 8 is a block diagram of an apparatus for notifying a downlink power allocation parameter according to another embodiment of the present invention;

fig. 9 is a block diagram of an apparatus for notifying a downlink power allocation parameter according to another embodiment of the present invention;

fig. 10 is a block diagram of a terminal according to another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

An embodiment of the present invention provides a method for notifying a downlink power allocation parameter, where an execution subject of the method is a base station, and as shown in fig. 1, the method includes:

step 101, a base station sends a frequency band specific downlink power allocation parameter to a terminal, so that the terminal obtains channel state information according to the frequency band specific downlink power allocation parameter, wherein the frequency band specific downlink power allocation parameter comprises N parameters, the N parameters respectively correspond to N frequency bands, and N is greater than or equal to 2;

alternatively, the terminal may be any terminal within the service range of the base station.

Optionally, different downlink power allocation parameters correspond to different frequency bands one to one. The N parameters are all first type parameters; or, the N parameters include a first type parameter and a second type parameter. Optionally, the first type of parameters may be obtained according to the second type of parameters, and the channel state information may be obtained according to the first type of parameters, or the channel state information may be directly obtained according to the first type of parameters.

It should be noted that the downlink power allocation parameters may include other parameters besides the N parameters, and the parameters are not band-specific parameters. It is understood that this parameter is a parameter of the whole frequency band, and is not different due to the difference of the frequency bands.

For example, the downlink power allocation parameters include 2 parameters, which are parameter 1 and parameter 2, respectively, where parameter 1 and parameter 2 are first-class parameters. Parameter 1 corresponds to band 1, parameter 2 corresponds to band 2, and band 1 is different from band 2.

For example, the downlink power allocation parameters include 3 parameters, which are parameter 1, parameter 2, and parameter 3, where parameter 1 and parameter 2 are first-class parameters, and parameter 3 is a second-class parameter. Parameter 1 corresponds to band 1, parameter 2 corresponds to band 2, parameter 3 corresponds to band 3, and band 1, band 2 are different from band 3. Alternatively, parameter 1 is a first type parameter, and parameters 2 and 3 are second type parameters. Parameter 1 corresponds to band 1, parameter 2 corresponds to band 2, parameter 3 corresponds to band 3, and band 1, band 2 are different from band 3.

In this embodiment, in any cell within the service range of the base station, the transmission power of the reference signal transmitted by the base station is different on different frequency bands. For example, as shown in fig. 2, cells within the service area of the base station are represented by hexagons, each hexagon represents a cell, and each cell can be divided into three types of cells, such as a type a cell, a type B cell, and a type C cell. Optionally, each cell is divided into a cell edge region and a cell center region according to a large-scale fading characteristic. For example, when a cell region with large-scale fading exceeding a preset threshold belongs to a cell edge region, it is represented by a shaded region in fig. 2; when the cell area with large scale fading below the preset threshold belongs to the cell center area, it is represented by a white area in fig. 2. Where large scale fading generally refers to signal attenuation due to various occlusions, the distribution can be considered as lognormal, which is slowly varying.

Optionally, the reference signal is transmitted by using a frequency band 1 for a cell edge region, and the reference signal is transmitted by using a frequency band 2 for a cell center region. And the power of the reference signal transmitted in band 1 is higher, and the power of the reference signal transmitted in band 2 is lower, and the reference signal refers to a common reference signal CRS and/or a channel state information reference signal CSI-RS. In addition, different frequency bands can be adopted for cell edge areas of three types of cells in one cell so as to avoid reference new-Ha interference among the cells. The horizontal axis of the coordinate axes indicates a frequency band, the vertical axis indicates a transmission power of a reference signal, in which a shaded area indicates a frequency band 1 and a white area indicates a frequency band 2, as a class a cell shown in fig. 3A, a class B cell shown in fig. 3B, and a class C cell shown in fig. 3C. Fig. 3A, 3B, and 3C are only schematic diagrams.

After the terminal receives at least two frequency band specific downlink power distribution parameters sent by the base station, the terminal can determine EPRE according to the downlink power distribution parameters_PDSCHAnd EPRE_CRSRatio of (A) or EPRE_PDSCHAnd EPRE_CSI-RSThe EPRE_DSC(Energy Per Resource Element) represents Energy on Resource elements of each Physical Downlink Shared Channel (PDSCH), and the EPRE_CRSRepresenting the energy on each CRS resource element, the EPRE_CSI-RSRepresenting energy on each CSI-RS resource element and according to EPRE_PDSCHAnd EPRE_CRSRatio of (A) or EPRE_PDSCHAnd EPRE_CSI-RSThe terminal obtains the channel state information.

And 102, the base station receives the channel state information sent by the terminal.

The base station may obtain the Channel state information by receiving information reported by a Channel Quality Indicator (CQI).

An embodiment of the present invention provides a method for notifying a downlink power allocation parameter, and as shown in fig. 4, the method includes:

step 401, a terminal receives a frequency band-specific downlink power allocation parameter sent by a base station, where the frequency band-specific downlink power allocation parameter includes N parameters, the N parameters respectively correspond to N frequency bands, and N is greater than or equal to 2;

In this embodiment, in any cell within the service range of the base station, the transmission powers of the reference signals transmitted by the base station on different frequency bands are different, which may specifically refer to the description in step 101 in fig. 1, and are not described in detail here.

Step 402, obtaining channel state information according to the frequency band specific downlink power distribution parameter;

the method comprises the following steps: obtaining EPRE according to the downlink power distribution parameter_PDSCHAnd EPRE_CRSIs or

EPRE_PDSCHAnd EPRE_CSI-RSThe EPRE_PDSCRepresenting energy on PDSCH resource elements of each physical downlink shared channel, the EPRE_CRSRepresenting the energy on each CRS resource element, the EPRE_CSI-RSRepresenting the energy on each CSI-RS resource element; according to the EPRE_PDSCHAnd EPRE_CRSOr the EPRE_PDSCHAnd EPRE_CSI-RSAnd adjusting the initial channel state information to obtain the adjusted channel state information.

N parameters in the downlink power allocation parameters correspond to N different frequency bands, and thus the N different frequency bands correspond to different channel state information, respectively. It should be noted that the channel state information obtained according to the band-specific downlink power allocation parameter is data channel state information, and the channel used when receiving the band-specific downlink power allocation parameter transmitted by the base station may be a common channel.

It should be noted that, after the base station sends the band-specific downlink power allocation parameter to the terminal, the base station sends the reference signal to the terminal on the N frequency bands, and after the terminal receives the reference signal sent by the base station, the terminal compares the reference signal, which is actually received and attenuated by the radio channel, with the original reference signal, so as to obtain the initial channel state information.

Step 403, sending the channel state information to the base station.

Optionally, the status information of the wireless channel is reported to the base station through the CQI report information.

The embodiment of the invention provides a method for notifying downlink power distribution parameters, which comprises the steps of receiving frequency band-specific downlink power distribution parameters sent by a base station; acquiring channel state information according to the frequency band specific downlink power distribution parameters; and sending the channel state information to the base station. Compared with the prior art that the transmission power of the CRS or the CSI-RS in the whole system bandwidth is constant, namely only one downlink power distribution parameter exists for the existing full frequency band, and the transmission power of the CRS or the CSI-RS does not change along with the change of the frequency band, so that stronger inter-cell reference signal interference occurs between the CRS or the CSI-RS between cells, and the frequency spectrum efficiency of the system is reduced.

An embodiment of the present invention provides a method for notifying a downlink power allocation parameter, and as shown in fig. 5, the method includes:

step 501, a base station sends a frequency band-specific downlink power allocation parameter to a terminal, where the frequency band-specific downlink power allocation parameter includes N parameters, the N parameters respectively correspond to N frequency bands, and N is greater than or equal to 2.

Optionally, all of the N parameters may be parameters of the first type. The first type parameter may be a first ratio parameter, and the first ratio parameter is EPRE_PDSCHAnd EPRE_CRSThe EPRE_PDSCHRepresenting the energy on the PDSCH resource element of the physical downlink shared channel, the EPRE_CRSRepresenting the energy on common reference signal, CRS, resource elements; or the first type parameter is a second ratio parameter, and the second ratio parameter is EPRE_PDSCHAnd EPRE_CSI-RSThe EPRE_CSI-RSRepresenting the energy on the channel state information reference signal, CSI-RS, resource elements. It should be noted that the downlink power allocation parameters may include other parameters besides the N parameters, and the parameters are not band-specific parameters. It is understood that this parameter is a parameter of the whole frequency band, and is not different due to the difference of the frequency bands.

For example, the downlink power allocation parameters include parameter 1 and parameter 2, where parameter 1 corresponds to frequency band 1, parameter 2 corresponds to frequency band 2, and frequency band 1 and frequency band 2 are different frequency bands.

For example, the downlink power allocation parameters include parameter 1, parameter 2, and parameter 3, where parameter 1 corresponds to band 1, parameter 2 corresponds to band 2, parameter 3 corresponds to band 3, and band 1, band 2, and band 3 are different bands.

Optionally, the N parameters include the first type of parameter and the second type of parameter. Wherein the second type of parameter is a ratio of the first type of parameter on a first frequency band to the first type of parameter on a second frequency band; or the second type of parameter is a ratio of the first ratio parameter on a first frequency band to the first ratio parameter on a second frequency band or the second ratio parameter on the second frequency band; or, the second type parameter is a ratio of the second ratio parameter on the first frequency band to the first ratio parameter on the second frequency band or the second ratio parameter on the second frequency band; or, the third type parameter is a ratio of the first type parameter on the first frequency band to the first ratio parameter or the second ratio parameter on the second frequency band;

For example, the downlink power allocation parameters include a parameter 1 and a parameter 4, where the parameter 1 is a first type of parameter and the parameter 4 is a second type of parameter. Parameter 1 corresponds to band 1, parameter 4 corresponds to band 4, and parameter 4 is the ratio of parameter 1 on band 1 to the first type of parameter on band 4, i.e. parameter 4 is the ratio between two first type of parameters. Or the parameter 1 may be a first ratio parameter or a second ratio parameter, in addition, the first type parameter corresponding to the frequency band 4 is the parameter 2, the parameter 2 may be a first ratio parameter or a second ratio parameter, and then the parameter 4 may also be a ratio between the parameter 1 on the frequency band 1 and the frequency band, the first ratio parameter or the second ratio parameter on the 4, or the parameter 4 may also be a ratio between the first ratio parameter on the frequency band 1 and the first ratio parameter or the second ratio parameter on the frequency band 4, or the parameter 4 may also be a ratio between the second ratio parameter on the frequency band 1 and the first ratio parameter or the second ratio parameter on the frequency band 4. It should be noted that the downlink power allocation parameters do not include the first type of parameters corresponding to the frequency band 2.

For example, the downlink power allocation parameters include a parameter 1, a parameter 2, and a parameter 4, where the downlink power allocation parameters include 2 first-class parameters and 1 second-class parameter, that is, the parameter 1 and the parameter 2 are the first-class parameters, and the parameter 4 is the second-class parameter. Parameter 1 corresponds to band 1, parameter 2 corresponds to band 2, parameter 4 corresponds to band 4, and parameter 4 is the ratio of parameter 1 on band 1 to the first type of parameter on band 4, or parameter 4 is the ratio of parameter 2 on band 2 to the first type of parameter on band 4. Assume that the first type of parameter corresponding to band 4 is parameter 3.

The parameter 1 may be a first ratio parameter or a second ratio parameter, the parameter 3 may be a first ratio parameter or a second ratio parameter, and the parameter 4 may also be a ratio between the parameter 1 in the frequency band 1 and the first ratio parameter or the second ratio parameter in the frequency band 4. Or the parameter 4 may also be a ratio of the first ratio parameter on the frequency band 1 to the first ratio parameter or the second ratio parameter on the frequency band 4. Or the parameter 4 may also be the ratio of the second ratio parameter on the frequency band 1 to the first ratio parameter or the second ratio parameter on the frequency band 4.

The parameter 2 may be a first ratio parameter or a second ratio parameter, the parameter 3 may be a first ratio parameter or a second ratio parameter, and the parameter 4 may also be a ratio between the parameter 2 in the frequency band 2 and the first ratio parameter or the second ratio parameter in the frequency band 4. Or the parameter 4 may also be a ratio of the first ratio parameter on the frequency band 2 to the first ratio parameter or the second ratio parameter on the frequency band 4. Or the parameter 4 may also be the ratio of the second ratio parameter on the frequency band 2 to the first ratio parameter or the second ratio parameter on the frequency band 4.

It should be noted that the downlink power allocation parameters do not include the first type of parameters corresponding to the frequency band 4.

For example, the downlink power allocation parameters include a parameter 1, a parameter 2, and a parameter 4, where the downlink power allocation parameters include 1 first-class parameter and 2 second-class parameters, that is, the parameter 1 is a first-class parameter, and the parameters 2 and 4 are second-class parameters. The parameter 1 corresponds to the frequency band 1, the parameter 2 corresponds to the frequency band 2, the first type parameter corresponding to the frequency band 2 is the parameter 3, the parameter 4 corresponds to the frequency band 4, the first type parameter corresponding to the frequency band 4 is the parameter 5, the parameter 2 is the ratio of the parameter 1 on the frequency band 1 to the first type parameter on the frequency band 2, and the parameter 4 is the ratio of the parameter 1 on the frequency band 1 to the first type parameter on the frequency band 4.

The parameter 1 may be a first ratio parameter or a second ratio parameter, and the parameter 3 may be a first ratio parameter or a second ratio parameter. The parameter 2 may be a ratio of the first type parameter corresponding to the frequency band 1 and the first ratio parameter or the second ratio parameter corresponding to the frequency band 2, or the parameter 2 may be a ratio of the first ratio parameter corresponding to the frequency band 1 and the first ratio parameter or the second ratio parameter corresponding to the frequency band 2, or the parameter 2 may be a ratio of the second ratio parameter corresponding to the frequency band 1 and the first ratio parameter or the second ratio parameter corresponding to the frequency band 2. The case that the parameter 5 is the first ratio parameter or the second ratio parameter is not described, and specifically, the case that the parameter 3 is the first ratio parameter or the second ratio parameter can be referred to. It should be noted that the downlink power allocation parameters do not include the first type parameter corresponding to the frequency band 2 and the first type parameter corresponding to the frequency band 4.

For example, the first type of parameter is EPRE_PDSCHAnd EPRE_CRSWhen the ratio of (A) to (B) is (B), P may be used_A1Denotes parameter 1, parameter 1 being a parameter of the first type, P_A1A parameter is allocated for the downlink power corresponding to band 1. Can adopt P_A2Denotes parameter 2, parameter 2 being a parameter of the first type, P_A2A parameter is allocated for the downlink power corresponding to band 2.

Parameter 4 is a second type of parameter, which may be P_A14Denotes the parameter 4, then P_A14＝P_A1/P_A4Or P is_A14＝P_A4/P_A1，

Wherein, P_A4Indicating a first type of parameter for band 4. Of course, parameter 4 can also adopt P_A24It is shown that,

then P is_A24＝P_A2/P_A4Or P is_A24＝P_A4/P_A2。

Or, the parameter 1 is a first kind of parameter, and the parameters 2 and 4 are second kind of parameters, wherein the parameters

Number 2 by P_A12Is shown, then P_A12＝P_A1/P_A2Or P is_A12＝P_A2/P_A1In which P is_A2For the first class of parameters corresponding to band 2, P is used_A14Denotes the parameter 4, then P_A14＝P_A1/P_A4Or P is_A14＝P_A4/P_A1Wherein P is_A4

Indicating a first type of parameter for band 4.

For example, the first type of parameter is EPRE_PDSCHAnd EPRE_CSI-RSWhen the ratio of (A) to (B) is (B), P may be used_C1Denotes parameter 1, parameter 1 being a parameter of the first type, P_C1A parameter is allocated for the downlink power corresponding to band 1. Can adopt P_C2Denotes parameter 2, parameter 2 being a parameter of the first type, P_C2Allocating parameters for downlink power corresponding to band 2

And (4) counting. Parameter 4 is a second type of parameter, which may be P_C14Representing the parameters 4, P_C14＝P_C1/P_C4Or P is_C14＝P_C4/P_C1，

Wherein, P_C4Indicating a first type of parameter for band 4. Of course, parameter 4 can also adopt P_C24It is shown that,

then P is_C24＝P_C2/P_C4Or P is_C24＝P_C4/P_C2。

Number 2 by P_C12Is shown, then P_C12＝P_C1/P_C2Or P is_C12＝P_C2/P_C1In which P is_C2For the first class of parameters corresponding to band 2, P is used_C14Denotes the parameter 4, then P_C14＝P_C1/P_C4Or P is_C14＝P_C4/P_C1Wherein P is_C4Indicating a first type of parameter for band 4.

Further optionally, any two frequency bands of the N frequency bands corresponding to the N parameters included in the downlink power allocation parameter partially overlap or do not overlap on the frequency domain.

A frequency band refers to a segment of frequency resources, e.g., a segment of frequency resources of a 10MHz bandwidth. While the frequency domain is a logical concept, referring to the frequency space.

Further optionally, each of the N frequency bands corresponding to the N parameters included in the downlink power allocation parameter occupies a part of a bandwidth or a part of physical resource blocks of the carrier when the base station transmits the reference signal; alternatively, the first and second electrodes may be,

n parameters included in the downlink power allocation parameters correspond to each frequency band in N frequency bands, and all bandwidths of carriers are occupied when the base station transmits the reference signals; the reference signal is CRS or CSI-RS.

For example, if one carrier is 20MHz, one band may occupy all 20MHz, and at this time, the band occupies one carrier, and if one band may also occupy 3MHz, the band occupies a part of the bandwidth of the carrier.

Further optionally, the base station sends a Radio Resource Control (RRC) signaling to the terminal, where the RRC signaling includes the downlink power allocation parameter specific to the frequency band.

Step 502, the base station sends reference signals to the terminal on the N frequency bands.

Wherein the transmission power of the reference signal transmitted on each of the N frequency bands corresponds to the band-specific downlink power allocation parameter of the each frequency band, and the reference signal includes a CRS or a CSI-RS. As shown in fig. 3, the shaded portion and the white portion respectively represent different frequency bands, and the transmitting powers of the different frequency bands are different, which may specifically refer to the description of fig. 3 and are not repeated here.

In step 503, the terminal receives the band-specific downlink power allocation parameter transmitted by the base station.

It should be noted that, for the description of the band-specific downlink power allocation parameter, reference may be made to the description in step 501, and details are not repeated here.

Optionally, the terminal receives a radio resource control protocol RRC signaling sent by the base station, where the RRC signaling includes the downlink power allocation parameter specific to the frequency band.

It should be noted that the execution sequence of step 502 and step 503 is not fixed, and step 502 may be executed first and then step 503 is executed, or step 503 is executed first and then step 502 is executed, or step 502 and step 503 are executed at the same time.

Step 504, the terminal receives the reference signal sent by the base station in the N frequency bands.

And 505, the terminal obtains initial channel state information according to the reference signal.

In this step, initial channel state information can be obtained according to the prior art, that is, the terminal compares the actually received CRS or CSI-RS attenuated by the radio channel with the original CRS or CSI-RS, so as to obtain the channel state information.

Step 506, the terminal obtains EPRE according to the downlink power distribution parameter_PDSCHAnd EPRE_CRSRatio of (A) or EPRE_PDSCHAnd EPRE_CSI-RSThe ratio of (a) to (b).

The EPRE_PDSCRepresenting the energy on the PDSCH resource element of the physical downlink shared channel, the EPRE_CRSRepresenting energy on CRS resource elements, the EPRE_CSI-RSRepresenting the energy on the CSI-RS resource elements.

Optionally, in this step, the terminal obtains the EPRE according to the downlink power allocation parameter_PDSCHAnd EPRE_CRSRatio of (A) or EPRE_PDSCHAnd EPRE_CSI-RSIn the ratio of (a), since N parameters in the downlink power allocation parameters may be the first type of parameters or the second type of parameters, the EPRE may be directly obtained according to the first type of parameters_PDSCHAnd EPRE_CRSOr the EPRE_PDSCHAnd EPRE_CSI-RSThe ratio of (A) to (B); alternatively, the first and second electrodes may be,

calculating according to the second kind of parameters to obtain the first kind of parameters, and then using the first kind of parameters as the first kind of parameters

EPRE_PDSCHAnd EPRE_CRSOr the EPRE_PDSCHAnd EPRE_CSI-RSThe ratio of (a) to (b).

Step 507, the terminal according to the EPRE_PDSCHAnd EPRE_CRSOr the EPRE_PDSCHAnd EPRE_CSI-RSAnd adjusting the initial channel state information to obtain the adjusted channel state information.

For example, the CQI in the initial channel state information obtained in step 505 is 10dB, EPRE_PDSCHAnd EPRE_CRSOr the EPRE_PDSCHAnd EPRE_CSI-RSThe value of CQI may be increased by 3dB to obtain the adjusted channel state information, i.e. CQI of 13 dB.

In step 508, the terminal sends the adjusted channel state information to the base station.

The embodiment of the invention provides a method for notifying downlink power distribution parameters, which can realize that different frequency bands adopt different downlink power distribution parameters by notifying the terminal of the downlink power distribution parameters with specific frequency bands, namely different frequency bands adopt different transmitting powers, and can reduce the interference of reference signals among cells, thereby improving the spectrum efficiency of a system.

An embodiment of the present invention provides a notification apparatus for downlink power allocation parameters, as shown in fig. 6, where the apparatus may be a base station, and the apparatus includes: transmitting section 601, receiving section 602;

a sending unit 601, configured to send a frequency band-specific downlink power allocation parameter to a terminal, so that the terminal obtains channel state information according to the frequency band-specific downlink power allocation parameter, where the frequency band-specific downlink power allocation parameter includes N parameters, the N parameters respectively correspond to N frequency bands, and N is greater than or equal to 2;

optionally, the N parameters are first type parameters;

Optionally, the N parameters include the first type of parameter and the second type of parameter;

Optionally, any two frequency bands of the N frequency bands in the frequency band-specific downlink power allocation parameter sent by the sending unit 601 partially overlap or do not overlap in the frequency domain.

Optionally, each frequency band in the N frequency bands in the frequency band-specific downlink power allocation parameter sent by the sending unit 601 occupies a part of bandwidth or a part of physical resource block of a carrier when the base station transmits the reference signal; or, each frequency band in the N frequency bands in the frequency band-specific downlink power allocation parameter sent by the sending unit 601 occupies the entire bandwidth of the carrier when the base station transmits the reference signal; the reference signal is CRS or CSI-RS.

A receiving unit 602, configured to receive the channel state information sent by the terminal.

Further optionally, the sending unit 601 is configured to send a radio resource control protocol RRC signaling to the terminal, where the RRC signaling includes the band-specific downlink power allocation parameter.

Further optionally, the sending unit 601 is further configured to:

It should be noted that, in the apparatus shown in fig. 6, specific implementation processes of the modules and contents such as information interaction between the modules may refer to the method embodiment because the method embodiment is based on the same inventive concept, and are not described in detail herein.

The embodiment of the invention provides a notification device of downlink power distribution parameters, which sends the downlink power distribution parameters with specific frequency bands to a terminal through a sending unit so that the terminal can obtain channel state information according to the downlink power distribution parameters; the receiving unit receives the channel state information sent by the terminal, so that different frequency bands can adopt different downlink power distribution parameters, namely different frequency bands adopt different transmitting powers, the interference of reference signals among cells can be reduced, and the spectrum efficiency of the system is improved.

An embodiment of the present invention provides a base station, as shown in fig. 7, where the base station includes: a memory 701, a processor 702, a transmitter 703, a receiver 704;

a memory 701 for storing information including program routines;

a processor 702 coupled to the memory 701, the transmitter 703 and the receiver 704 for controlling the execution of said program routines;

a transmitter 703, configured to send a frequency band-specific downlink power allocation parameter to a terminal, so that the terminal obtains channel state information according to the frequency band-specific downlink power allocation parameter, where the frequency band-specific downlink power allocation parameter includes N parameters, the N parameters respectively correspond to N frequency bands, and N is greater than or equal to 2;

a receiver 704, configured to receive the channel state information sent by the terminal.

Optionally, the N parameters in the frequency band-specific downlink power allocation parameters sent by the sender 703 are first-class parameters;

Optionally, the N parameters in the band-specific downlink power allocation parameters sent by the transmitter 703 include the first type of parameter and the second type of parameter;

Optionally, any two frequency bands of the N frequency bands in the frequency band-specific downlink power allocation parameter sent by the transmitter 703 partially overlap or do not overlap on the frequency domain.

Optionally, each frequency band of the N frequency bands in the frequency band-specific downlink power allocation parameter sent by the sender 703 occupies a part of a bandwidth or a part of a physical resource block of a carrier when the base station transmits a reference signal; or, each frequency band in the N frequency bands in the frequency band-specific downlink power allocation parameter sent by the transmitter 703 occupies the entire bandwidth of the carrier when the base station transmits the reference signal; the reference signal is CRS or CSI-RS.

Further optionally, the transmitter 703 is configured to:

Further optionally, the transmitter 703 is further configured to:

transmitting a reference signal to the terminal over the N frequency bands, wherein a transmit power of the reference signal transmitted on each of the N frequency bands corresponds to the band-specific lower level of the each frequency bandThe reference signal comprises CRS or CSI-RS. It should be noted that N parameters included in the downlink power allocation parameters are first-class parameters, and the first-class parameters are EPRE_PDSCHAnd EPRE_CRSOr the first type parameter is EPRE_PDSCHAnd EPRE_CSI-RSThe ratio of (a) to (b). Numerically, the transmission power and EPRE_CRSOr EPRE_CSI-RSThe same is true.

It should be noted that, in the apparatus shown in fig. 7, specific implementation processes of the modules and contents such as information interaction between the modules may refer to the method embodiment because the method embodiment is based on the same inventive concept, and are not described in detail herein.

The embodiment of the invention provides a base station, which sends a frequency band specific downlink power distribution parameter to a terminal through a sender so that the terminal can obtain channel state information according to the downlink power distribution parameter; the receiver receives the channel state information sent by the terminal, so that different frequency bands can adopt different downlink power distribution parameters, namely different frequency bands adopt different transmitting powers, the interference of reference signals among cells can be reduced, and the spectrum efficiency of the system is improved.

An embodiment of the present invention provides a device for notifying a downlink power allocation parameter, where the device may be a terminal, and as shown in fig. 8, the device includes: a receiving unit 801, an obtaining unit 802, a transmitting unit 803;

a receiving unit 801, configured to receive a frequency band-specific downlink power allocation parameter sent by a base station, where the frequency band-specific downlink power allocation parameter includes N parameters, the N parameters respectively correspond to N frequency bands, and N is greater than or equal to 2;

wherein, the N parameters in the band-specific downlink power allocation parameters received by the receiving unit 801 are first type parameters; the first type parameter is a first ratio parameter, and the first ratio parameter is EPRE_PDSCHAnd EPRE_CRSThe EPRE_PDSCHRepresenting the energy on the PDSCH resource element of the physical downlink shared channel, the EPRE_CRSRepresenting the energy on common reference signal, CRS, resource elements; or the first type parameter is a second ratio parameter, and the second ratio parameter is EPRE_PDSCHAnd EPRE_CSI-RSThe EPRE_CSI-RSRepresenting the energy on the channel state information reference signal, CSI-RS, resource elements;

the N parameters in the band-specific downlink power allocation parameters received by the receiving unit 801 include the first type of parameters and the second type of parameters; wherein the second type of parameter is a ratio of the first type of parameter on a first frequency band to the first type of parameter on a second frequency band; or the second type of parameter is a ratio of the first ratio parameter on a first frequency band to the first ratio parameter on a second frequency band or the second ratio parameter on the second frequency band; or, the second type parameter is a ratio of the second ratio parameter on the first frequency band to the first ratio parameter on the second frequency band or the second ratio parameter on the second frequency band; or, the third type parameter is a ratio of the first type parameter on the first frequency band to the first ratio parameter or the second ratio parameter on the second frequency band;

Optionally, any two frequency bands of the N frequency bands in the frequency band-specific downlink power allocation parameter received by the receiving unit 801 partially overlap or do not overlap on the frequency domain.

Optionally, each frequency band in the N frequency bands in the frequency band-specific downlink power allocation parameter received by the receiving unit 801 occupies a part of bandwidth or a part of physical resource block of a carrier when the base station transmits the reference signal; or, each frequency band in the N frequency bands in the frequency band-specific downlink power allocation parameters received by the receiving unit 801 occupies the entire bandwidth of the carrier when the base station transmits the reference signal; the reference signal is CRS or CSI-RS.

An obtaining unit 802, configured to obtain channel state information according to the band-specific downlink power allocation parameter received by the receiving unit 801;

a sending unit 803, configured to send the channel state information obtained by the obtaining unit 802 to the base station.

Further optionally, before the obtaining unit 802 obtains the channel state information according to the downlink power allocation parameter received by the receiving unit 801, the receiving unit 801 is further configured to receive reference signals sent by the base station on the N frequency bands, where the reference signals include a common reference signal CRS or a channel state information reference signal CSI-RS;

the obtaining unit 802 is further configured to obtain initial channel state information according to the reference signal.

Further optionally, when N parameters in the frequency band-specific downlink power allocation parameters are first-class parameters, the obtaining unit 802 is configured to adjust the initial channel state information according to the first ratio parameter or the second ratio parameter, and obtain the adjusted channel state information.

Further optionally, as shown in fig. 9, when N parameters in the frequency band-specific downlink power allocation parameters are parameters of the second type, the obtaining unit 802 includes: a first obtaining module 8021, a second obtaining module 8022;

a first obtaining module 8021, configured to obtain the first ratio parameter or the second ratio parameter according to the second type of parameter;

a second obtaining module 8022, configured to adjust the initial channel state information according to the first ratio parameter or the second ratio parameter, and obtain the adjusted channel state information.

Further optionally, when receiving the band-specific downlink power allocation parameter, the receiving unit 801 is configured to receive a radio resource control protocol RRC signaling sent by the base station, where the RRC signaling includes the band-specific downlink power allocation parameter.

It should be noted that, in the apparatus shown in fig. 8 or 9, specific implementation processes of the modules and contents such as information interaction between the modules may refer to the method embodiment because the method embodiment is based on the same inventive concept, and are not described herein again.

The embodiment of the invention provides a notification device of downlink power distribution parameters, which receives the downlink power distribution parameters with specific frequency bands sent by a base station through a receiving unit, and then an obtaining unit obtains channel state information according to the downlink power distribution parameters with specific frequency bands received by the receiving unit; the sending unit sends the obtained channel state information to the base station, so that different frequency bands can adopt different downlink power distribution parameters through the frequency band-specific downlink power distribution parameters, namely different frequency bands adopt different transmitting powers, the interference of reference signals among cells can be reduced, and the spectrum efficiency of the system is improved.

An embodiment of the present invention provides a terminal, as shown in fig. 10, where the terminal includes: a receiver 1001, a memory 1002, a processor 1003, a transmitter 1004;

a receiver 1001, configured to receive a frequency band-specific downlink power allocation parameter sent by a base station, where the frequency band-specific downlink power allocation parameter includes N parameters, the N parameters respectively correspond to N frequency bands, and N is greater than or equal to 2;

a memory 1002 for storing information including program routines;

a processor 1003, coupled to the memory 1002, the transmitter 1004 and the receiver 1001, is configured to control the execution of the program routines, in particular to: acquiring channel state information according to the frequency band-specific downlink power distribution parameters received by the receiver;

a transmitter 1004, configured to transmit the channel state information obtained by the processor to the base station.

Wherein, the N parameters in the band-specific downlink power allocation parameters received by the receiver 1001 are first type parameters; the first type parameter is a first ratio parameter, and the first ratio parameter is EPRE_PDSCHAnd EPRE_CRSThe EPRE_PDSCHRepresenting the energy on the PDSCH resource element of the physical downlink shared channel, the EPRE_CRSRepresenting the energy on common reference signal, CRS, resource elements; or the first type parameter is a second ratio parameter, and the second ratio parameter is EPRE_PDSCHAnd EPRE_CSI-RSThe EPRE_CSI-RSRepresenting the energy on the channel state information reference signal, CSI-RS, resource elements.

The N parameters of the band-specific downlink power allocation parameters received by the receiver 1001 include the first type of parameters and the second type of parameters; wherein the second type of parameter is a ratio of the first type of parameter on a first frequency band to the first type of parameter on a second frequency band; or the second type of parameter is a ratio of the first ratio parameter on a first frequency band to the first ratio parameter on a second frequency band or the second ratio parameter on the second frequency band; or, the second type parameter is a ratio of the second ratio parameter on the first frequency band to the first ratio parameter on the second frequency band or the second ratio parameter on the second frequency band; or, the third type parameter is a ratio of the first type parameter on the first frequency band to the first ratio parameter or the second ratio parameter on the second frequency band;

Optionally, any two frequency bands of the N frequency bands in the frequency band-specific downlink power allocation parameters received by the receiver 1001 partially overlap or do not overlap in the frequency domain.

Optionally, each frequency band of the N frequency bands in the frequency band-specific downlink power allocation parameter received by the receiver 1001 occupies a part of bandwidth or a part of physical resource block of a carrier when the base station transmits a reference signal; or, each frequency band of the N frequency bands in the frequency band-specific downlink power allocation parameters received by the receiver 1001 occupies the entire bandwidth of the carrier when the base station transmits the reference signal; the reference signal is CRS or CSI-RS.

Further optionally, before the processor 1003 obtains the channel state information according to the band-specific downlink power allocation parameter received by the receiver 1001, the receiver 1001 is further configured to receive reference signals sent by the base station on the N frequency bands, where the reference signals include a common reference signal CRS or a channel state information reference signal CSI-RS;

the processor is further configured to obtain initial channel state information according to the reference signal.

Further optionally, when N parameters in the frequency band-specific downlink power allocation parameters are first-class parameters, the processor 1003 is configured to adjust the initial channel state information according to the first ratio parameter or the second ratio parameter, and obtain adjusted channel state information.

Further optionally, when N parameters in the frequency band-specific downlink power allocation parameters are second-class parameters, the processor 1003 calculates and obtains the first ratio parameter or the second ratio parameter according to the second-class parameters; and adjusting the initial channel state information according to the first ratio parameter or the second ratio parameter to obtain the adjusted channel state information.

Further optionally, when the receiver 1001 receives the band-specific downlink power allocation parameter, the receiver is configured to receive a radio resource control protocol RRC signaling sent by the base station, where the RRC signaling includes the band-specific downlink power allocation parameter.

It should be noted that, in the apparatus shown in fig. 10, specific implementation processes of the modules and contents such as information interaction between the modules may refer to the method embodiment because the method embodiment is based on the same inventive concept, and are not described in detail herein.

The embodiment of the invention provides a notification device of downlink power distribution parameters, which receives the downlink power distribution parameters with specific frequency bands sent by a base station through a receiver, and then a processor obtains channel state information according to the downlink power distribution parameters with specific frequency bands received by a receiving unit; the transmitter transmits the obtained channel state information to the base station, so that different frequency bands can adopt different downlink power distribution parameters through the frequency band-specific downlink power distribution parameters, namely different frequency bands adopt different transmitting powers, the interference of reference signals among cells can be reduced, and the spectrum efficiency of the system is improved.

It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

From the above description of the embodiments, those skilled in the art will clearly understand that the present invention can be implemented by software plus necessary general-purpose hardware, and certainly can also be implemented by special-purpose hardware including special-purpose integrated circuits, special-purpose CPUs, special-purpose memories, special-purpose components and the like, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a readable storage medium, such as a floppy disk, a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk of a computer, and includes instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the apparatus and system embodiments are substantially similar to the method embodiments and are therefore described in a relatively simple manner, where relevant, reference may be made to some descriptions of the method embodiments.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for notifying downlink power allocation parameters is characterized by comprising the following steps:

a base station sends a frequency band specific downlink power distribution parameter to a terminal, wherein the frequency band specific downlink power distribution parameter comprises N parameters, the N parameters respectively correspond to N frequency bands, and N is greater than or equal to 2;

and the base station receives channel state information sent by the terminal, wherein the channel state information is obtained according to the frequency band specific downlink power distribution parameter.

2. The method of claim 1,

the N parameters are first-class parameters, and the first-class parameters are EPRE (expressed Per resource Environment)_PDSCHAnd EPRE_CSI-RSThe EPRE_PDSCHRepresenting the energy on the PDSCH resource element of the physical downlink shared channel, the EPRE_CSI-RSRepresenting the energy on the channel state information reference signal, CSI-RS, resource elements.

3. The method according to claim 1 or 2,

any two of the N frequency bands may or may not partially overlap in the frequency domain.

4. A method for notifying downlink power allocation parameters, the method comprising the features of any of claims 1 to 3, wherein,

the reference signal is CRS or CSI-RS.

5. A method for notifying downlink power allocation parameters, the method comprising the features of any one of claims 1 to 4, wherein the base station transmits the band-specific downlink power allocation parameters to the terminal, and the method comprises:

6. A method for notifying downlink power allocation parameters, the method comprising the features of any one of claims 1 to 5, wherein after the sending of the band-specific downlink power allocation parameters to a terminal, and before the receiving of the channel state information sent by the terminal, the method further comprises:

the base station transmits reference signals to the terminal on the N frequency bands, wherein the transmission power of the reference signals transmitted on each frequency band in the N frequency bands corresponds to the frequency band-specific downlink power allocation parameters of each frequency band, and the reference signals comprise CRS or CSI-RS.

7. A method for transmitting channel state information, comprising:

a terminal receives a frequency band specific downlink power distribution parameter sent by a base station, wherein the frequency band specific downlink power distribution parameter comprises N parameters, the N parameters respectively correspond to N frequency bands, and N is greater than or equal to 2;

the terminal obtains channel state information according to the specific downlink power distribution parameter of the frequency band;

and the terminal sends the channel state information to the base station.

8. The method of claim 7,

the N parameters are first type parameters;

the first type parameter is EPRE_PDSCHAnd EPRE_CSI-RSThe EPRE_PDSCHRepresenting the energy on the PDSCH resource element of the physical downlink shared channel, the EPRE_CSI-RSRepresenting the energy on the channel state information reference signal, CSI-RS, resource elements.

9. The method according to claim 7 or 8,

10. The method of claim 9,

the reference signal is CRS or CSI-RS.

11. A method for transmitting channel state information, the method comprising the features of any one of claims 7 to 10, wherein the receiving, by the terminal, the band-specific downlink power allocation parameter transmitted by the base station comprises:

and the terminal receives a radio resource control protocol (RRC) signaling sent by a base station, wherein the RRC signaling comprises a frequency band specific downlink power allocation parameter.

12. A method for transmitting channel state information, the method comprising the features of any one of claims 7 to 11, wherein the terminal, after receiving the downlink power allocation parameter and before transmitting the channel state information to the base station, further comprises:

the terminal receives reference signals on the N frequency bands, the transmission power of the reference signals on each frequency band in the N frequency bands corresponds to the frequency band-specific downlink power allocation parameters of each frequency band, and the reference signals comprise CRS or CSI-RS.

13. An apparatus for notifying downlink power allocation parameters, comprising:

a sending unit, configured to send a frequency band-specific downlink power allocation parameter to a terminal, where the frequency band-specific downlink power allocation parameter includes N parameters, the N parameters respectively correspond to N frequency bands, and N is greater than or equal to 2;

and the receiving unit is used for receiving the channel state information sent by the terminal, wherein the channel state information is obtained according to the frequency band specific downlink power distribution parameter.

14. The apparatus according to claim 13, wherein the N parameters of the band-specific downlink power allocation parameters transmitted by the transmitting unit are first type parameters;

15. The apparatus of claim 13 or 14,

any two frequency bands of the N frequency bands in the frequency band-specific downlink power allocation parameters transmitted by the transmitting unit may partially overlap or not overlap in the frequency domain.

16. An apparatus for notifying downlink power allocation parameters, the apparatus comprising the features of the apparatus of any of claims 13-15, wherein,

the reference signal is CRS or CSI-RS.

17. An apparatus for notifying downlink power allocation parameters, the apparatus comprising the features of any one of claims 13 to 16, wherein the transmitting unit is configured to:

18. An apparatus for notifying downlink power allocation parameters, the apparatus comprising the features of any one of claims 13 to 17, wherein the sending unit is further configured to:

19. A terminal, comprising:

20. The terminal of claim 19,

21. The terminal according to claim 19 or 20,

22. The terminal of claim 21,

the reference signal is CRS or CSI-RS.

23. A terminal, characterized in that the terminal comprises the features of the terminal of any of claims 19-22, wherein the receiving unit is configured to:

24. A terminal, characterized in that the terminal comprises the features of the terminal of any of claims 19-23, wherein the receiving unit is further configured to: after receiving the downlink power allocation parameters, before sending the channel state information to the base station, receiving reference signals on the N frequency bands, where a transmission power of the reference signal on each of the N frequency bands corresponds to the band-specific downlink power allocation parameters of the each frequency band, and the reference signals include CRS or CSI-RS.

25. A computer storage medium storing computer instructions which, when executed by a base station, cause the base station to perform the method of any one of claims 1 to 6.

26. A computer storage medium storing computer instructions which, when executed by a terminal, cause the terminal to perform the method of any one of claims 7 to 12.