CN102209375A - Method for setting downlink channel power and equipment implementing same - Google Patents

Abstract

The invention relates to mobile communication technologies, in particular to a method for setting a downlink channel power and equipment implementing the method. In the embodiment of the invention, a base station reports at least one power parameter in a plurality of frequency ranges to a wireless network controller; and the wireless network controller sets power for a downlink channel in a cell according to the power parameter. According to the embodiment of the invention, the wireless network controller can set the downlink channel power according to the power parameter, which is reported by the base station, of a far-end radio frequency unit working on a main frequency range, so that the power is prevented from being set to be too high or too low.

Description

The equipment of downlink channel power setting method and this method of realization

Technical field

The present invention relates to mobile communication technology, particularly be the radio network controller and the base station of method and this method of realization of the cell setting downlink channel power that uses a plurality of frequency ranges.

Background technology

In the third generation (3G) mobile communication technology,, can in mobile communication system, introduce two or more frequencies or carrier frequency carries wireless signal for the signal that suppresses between the neighbor cell disturbs.That is to say,, adopt a plurality of frequency ranges to support radio communication between B node and the subscriber equipment for each sub-district.

In typical TD-SCDMA system, usually adopt a main carrier frequency to support multiband to communicate by letter with the compound mode of some minor carriers.Main carrier frequency for example can be positioned at the frequency range of 2010-2025 megahertz (MHz), and minor carrier for example can be positioned at the frequency range of 1880-1920 megahertz.

Existing third generation cooperative programme (3GPP) has been made regulation for mode how to set channel power in the sub-district of using a plurality of frequency ranges.Particularly, B node or base station are by sending message to the wireless network controller reporting power parameter, subsequently, radio network controller is set the power of B node to the subscriber equipment downlink channel of (perhaps being called travelling carriage) (for example downlink pilot frequency channel (DwPCH) and master-Common Control Physical Channel (PCCPCH)) in view of the above.The ins and outs of relevant this respect for example can be referring to 3GPP TS 25.433 standards, and this standard comprises in this manual in this mode of quoting in full.

Yet when setting channel power, prior art does not take into full account difference between the different frequency range to the influence of power setting, therefore sometimes may be with power setting on irrational level.

Summary of the invention

Therefore, an object of the present invention is in mobile communication system, reasonably to set downlink channel power for the sub-district of using a plurality of frequency ranges.

According to one aspect of the present invention, a kind of method of carrying out the power setting of downlink channel in radio network controller for the sub-district of using a plurality of frequency ranges is provided, this method comprises the following steps:

From the base station receive with described a plurality of frequency ranges at least one relevant power parameter;

According to described a plurality of frequency ranges at least one relevant power parameter determine described power setting; And

Send described power setting to described base station.

Preferably, in said method, described power parameter is at least one the maximum downlink power capacity in described a plurality of frequency range.Particularly, if in described sub-district, adopt diversity mode, then the maximum downlink power capacity of at least one of described a plurality of frequency ranges equal all branches each maximum power capabilities linearity and.

Preferably, in said method, described power parameter is included in from described base station to the resource status Indication message that described radio network controller sends.

Preferably, in said method, at least one in described a plurality of frequency ranges is the primary band in the TD-SCDMA communication system.

According to another aspect of the present invention, provide a kind of in the base station method for the power of the cell setting downlink channel that uses a plurality of frequency ranges, this method comprises the following steps:

To radio network controller send with described a plurality of frequency ranges at least one relevant power parameter;

Receive the power setting of described downlink channel from described radio network controller; And

Set the power of described downlink channel according to described power setting.

Preferably, in said method, described power parameter is at least one the maximum downlink power capacity in described a plurality of frequency range.Particularly, if in described sub-district, adopt diversity mode, then the maximum downlink power capacity of at least one of described a plurality of frequency ranges equal all branches each maximum power capabilities linearity and.

Preferably, in said method, described power parameter is included in from described base station to the resource status Indication message that described radio network controller sends.

Preferably, in said method, at least one in described a plurality of frequency ranges is the primary band in the TD-SCDMA communication system.Particularly, described base station is based on the distributed structure/architecture that comprises base station unit and a plurality of remote radio unit (RRU)s, and described power parameter is determined by following formula:

$\mathrm{PowerPara}=30+10\×\log \left(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{p}_i\right)$

Wherein, PowerPara is described power parameter, and n is the quantity that works in the passage that the described remote radio unit (RRU) on one of them described frequency range comprises, p _iFor watt being i the maximum transmission power that passage is required of unit.

According to aspect in addition of the present invention, a kind of radio network controller that is used to the sub-district of using a plurality of frequency ranges to carry out the power setting of downlink channel is provided, comprising:

Receiving element is used for from base station reception at least one relevant power parameter with described a plurality of frequency ranges;

Determining unit is used for according to determining described power setting with at least one relevant power parameter of described a plurality of frequency ranges; And

Transmitting element is used for sending described power setting to described base station.

Preferably, in above-mentioned radio network controller, described power parameter is at least one the maximum downlink power capacity in described a plurality of frequency range.Particularly, if in described sub-district, adopt diversity mode, then the maximum downlink power capacity of at least one of described a plurality of frequency ranges equal all branches each maximum power capabilities linearity and.

Preferably, in above-mentioned radio network controller, described power parameter is included in from described base station to the resource status Indication message that described radio network controller sends.

Preferably, in above-mentioned radio network controller, at least one in described a plurality of frequency ranges is the primary band in the TD-SCDMA communication system.

According to aspect in addition of the present invention, a kind of base station that is used to the power of the cell setting downlink channel that uses a plurality of frequency ranges is provided, comprising:

Transmitting element is used for to radio network controller transmission at least one relevant power parameter with described a plurality of frequency ranges;

Receiving element is used for receiving from described radio network controller the power setting of described downlink channel; And

Setup unit is used for setting according to described power setting the power of described downlink channel.

Preferably, in above-mentioned base station, described power parameter is at least one the maximum downlink power capacity in described a plurality of frequency range.Particularly, if in described sub-district, adopt diversity mode, then the maximum downlink power capacity of at least one of described a plurality of frequency ranges equal all branches each maximum power capabilities linearity and.

Preferably, in above-mentioned base station, described power parameter is included in from described base station to the resource status Indication message that described radio network controller sends.

Preferably, in above-mentioned base station, at least one in described a plurality of frequency ranges is the primary band in the TD-SCDMA communication system.Particularly, described base station is based on the distributed structure/architecture that comprises base station unit and a plurality of remote radio unit (RRU)s, and described power parameter is determined by following formula:

$\mathrm{PowerPara}=30+10\×\log \left(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{p}_i\right)$

Wherein, PowerPara is described power parameter, and n is the quantity that works in the passage that the described remote radio unit (RRU) on one of them described frequency range comprises, and pi is for watt being i the maximum transmission power that passage is required of unit.

According to embodiments of the invention, radio network controller can be only set downlink channel power according to the power parameter of the remote radio unit (RRU) of working of base station report on primary band, therefore avoided this power setting is got too high or too low.

Accompanying drawing is described

By can further understanding various feature and advantage of the present invention to the detailed description of the embodiment of the invention, wherein below in conjunction with accompanying drawing:

Fig. 1 is the schematic diagram of typical 3G mobile communication system.

Fig. 2 is a kind of typical distribution formula base station architecture schematic diagram.

Fig. 3 is the flow chart of the method for the cell setting downlink channel power that uses a plurality of frequency ranges according to one embodiment of the invention in mobile communication system.

Fig. 4 is according to the radio network controller of another embodiment of the present invention and the schematic diagram of base station, and this radio network controller and base station are used to the cell setting downlink channel power that uses a plurality of frequency ranges.

Embodiment

Below by accompanying drawing embodiments of the invention are described.

Fig. 1 is the schematic diagram of typical 3G mobile communication system.As shown in Figure 1, this 3G mobile communication system comprises core net CN, passes through Iu interface some RNS RNS that link to each other with core net and the user equipment (UE) that links to each other with RNS by air interface Uu.Link to each other by the Iur interface between the RNS, and each RNS comprises radio network controller (RNC) and the B node NodeB that links to each other with radio network controller by Iub interface.

It is worthy of note that in the following description of this specification, term " base station " and " B node " can exchange use.

In order to improve the indoor covering power of mobile communication system, a kind of distributed base station framework has been proposed, its core concept is that the baseband portion of base station and radio frequency part are separated: radio frequency part can be placed on Anywhere indoor neatly, baseband portion is concentrated to place base band can be shared, baseband pool is connected with remote radio unit (RRU) in being distributed in building by optical fiber, and 1～8 passage can be supported in single sub-district.

Fig. 2 is a kind of distributed base station schematic diagram of exemplary TD-SCDMA communication system, and shown base station architecture can be applicable to B node shown in Figure 1.As shown in Figure 2, this base station comprises Base Band Unit BBU and the remote radio unit (RRU) RRU1-RRU6 that is coupled by optical fiber op#1-op#6 and Base Band Unit BBU respectively.As an example, suppose two frequency ranges of each sub-district use here, promptly as the A frequency range (for example being 2010-2025MHz) of primary band with as the F-band of assisting frequency range (for example being 1880-1920MHz); Each of remote radio unit (RRU) RRU1-RRU6 comprises 8 passages, and these remote radio unit (RRU)s are divided into three groups, wherein, remote radio unit (RRU) RRU1 and RRU2 serve sub-district 1 and work in A frequency range and F-band respectively, remote radio unit (RRU) RRU3 and RRU4 serve sub-district 2 and work in A frequency range and F-band respectively, and remote radio unit (RRU) RRU5 and RRU6 serve sub-district 3 and work in A frequency range and F-band respectively.

Below be example with distributed base station framework recited above, the method for the cell setting downlink channel power that uses a plurality of frequency ranges according to the embodiment of the invention is described.

Fig. 3 is the flow chart of the method for the cell setting downlink channel power that uses a plurality of frequency ranges according to one embodiment of the invention in mobile communication system.

In step 310, the control unit (not shown) of base station is determined the A frequency range in the sub-district (being example with sub-district 1) and the maximum downlink power capacity of F-band here.Generally speaking, the maximum downlink power capacity with antenna connector as the reference point.For the sub-district of adopting diversity mode, the maximum downlink power capacity be all branches maximum power capabilities linearity with.As mentioned above, each of serving that the remote radio unit (RRU) RRU1 of sub-district 1 and RRU2 work in A frequency range and F-band and they respectively comprises 8 passages.Suppose for remote radio unit (RRU) RRU1, its every the required maximum transmission power of passage is 3 watts, for remote radio unit (RRU) RRU2, its every the required maximum transmission power of passage is 5 watts, then can determine the corresponding maximum downlink power capacity of each frequency range according to following formula:

$\mathrm{PowerPara}=30+10\×\log \left(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{p}_i\right)$

Wherein, PowerPara is the power parameter of the power features of sign frequency range, and here the maximum downlink power capacity with a frequency range illustrates, and n is the quantity that works in the passage that remote radio unit (RRU) comprised on this frequency range, p _iFor watt being i the maximum transmission power that passage is required of unit.

Can get according to following formula, for sub-district 1, the maximum downlink power capacity of A frequency range (primary band) and F-band (auxiliary frequency range) is respectively 43.80dBm and 46.02dBm.

It is to be noted, in the present embodiment, suppose that for each remote radio unit (RRU), the maximum transmission power of its every passage equates, but in fact the maximum transmission power of every passage also can be unequal, and these variations all belong within the scope of the present invention.

It is pointed out that also the maximum downlink power capacity here only is the example of the parameter of a power features that characterizes frequency range, it is qualification to protection range of the present invention that object lesson described here should not be considered as.

Then enter step 320.In this step, the control unit of base station generates a message that sends to radio network controller (RNC) and reports to radio network controller (RNC) with the A frequency range that step 310 is calculated and the maximum downlink power capacity of F-band.In the present embodiment, utilization is called the approach of resource status indication (Resource Status Indication is designated hereinafter simply as RSI) message as report.The form of this message has been made regulation in 3GPP TS25.433 standard.In the present embodiment, in order to be unit report maximum downlink power capacity with the frequency range, done improvement for the form of RSI message, following tabulation 1 shows the RSI message after the improvement.

Table 1

IE/Group?Name

Presence

Range

IE?Type and Reference

Semantics Description

Criticality

Assigned Criticality

Message Discriminator

M

9.2.1.45

-

Message?Type

M

9.2.1.46

YES

ignore

Transaction?ID

M

9.2.1.62

-

CHOICE Indication?Type

M

YES

ignore

>No?Failure

>>Local?Cell Information

1..<ma x LocalC ellinN ode?B>

EACH

ignore

>>>Local?Cell?ID

M

9.2.1.38

-

>>>Add/Delete Indicator

M

9.2.1.1

-

>>>DL?Or?Global Capacity?Credit

C-add

9.2.1.20B

-

>>>UL?Capacity Credit

O

9.2.1.65A

-

>>>Common Channels Capacity Consumption?Law

C-add

9.2.1.9A

-

>>>Dedicated Channels Capacity Consumption?Law

C-add

9.2.1.20A

-

>>>Maximum?DL

C-add

9.2.1.39

-

Power?Capability

>>>Minimum Spreading?Factor

C-add

9.2.1.47

-

...

>>>Joint Detection Capability

O

9.2.3.11b

>>>Maximum DL?Power Capability?List

O

1..<ma xNum OfBan dInNo deB>

>>>>Band?Id

M

9.2.3.72

>>>>Maximum DL?Power Capability?for?the Band

M

9.2.1.39b

...

As shown in table 1, present embodiment is to have increased attribute item Maximum DL Power Capability List, Band Id and Maximum DLPower Capability for the Band to the improvement of RSI message format, and they represent the maximum downlink power capacity of each frequency range in sub-district of the identifier of the tabulation of frequency range or quantity, frequency range and base station or the cell set respectively.The maximum downlink power capacity for example can be described according to the mode shown in the table 2:

Table 2

IE/Group?Name	Presence	Range	?IE?Type?and?Reference	Semantics?Description
					Maximum?DL?PowerCapability?for?theBand			?INTEGER?(0..500)	Unit: dBm scope: 0..50dBm unit's stepping length: 0.1dB

Enter step 330 subsequently.In this step, the control unit of base station sends RSI message as shown in table 1 by Iub interface to radio network controller (RNC).

Then, in step 340, radio network controller (RNC) receives the RSI message from the base station.

Enter step 350 subsequently.In this step, radio network controller (RNC) extracts the maximum downlink power capacity (43.80dBm for calculating in the step 310 in the present embodiment) as the A frequency range of primary band from the RSI message that receives, and the maximum transmission power of base station down link channel is set at is no more than this maximum downlink power capacity, i.e. 43.80dBm.For example downlink pilot frequency channel (DwPCH) and master-Common Control Physical Channel (PCCPCH) all are set at and are no more than 43.80dBm.

Then, in step 360, radio network controller (RNC) generates a message that sends to the base station and reports to the base station with the maximum transmission power of determining in step 350.In the present embodiment, utilize and to be called the sub-district and to set up request (Cell Setup Request is designated hereinafter simply as CSR) message as the approach of reporting.The form of this message has been made regulation in 3GPP TS 25.433 standards.In the present embodiment, in order to be unit report maximum transmission power with the frequency range, done improvement for the form of CSR message, following tabulation 3 shows the CSR message after the improvement.

Table 3

IE/Group?Name

Presence

Range

IE?Type?and Reference

Semantics Description

Criticality

?Assigned?Criticality

Message Discriminator

M

9.2.1.45

-

Message?Type

M

9.2.1.46

YES

?reject

Transaction?ID

M

9.2.1.62

-

Local?Cell?ID

M

9.2.1.38

YES

?reject

C-ID

M

9.2.1.9

YES

?reject

Configuration Generation?Id

M

9.2.1.16

YES

?reject

UARFCN

M

9.2.1.65

YES

?reject

Cell?Parameter ID

M

9.2.3.4

YES

?reject

Maximum Transmission Power

M

9.2.1.40

YES

?reject

Maximum Transmission Power?List

O

1..<ma xNum OfBan dInNo deB>

>Band?Id

M

9.2.3.72

>Maximum Transmission Powerforthe Band

M

9.2.1.40C

...

As shown in table 3, present embodiment is to have increased attribute item Maximum Transmission Power List, Band Id and MaximumTransmission Power for the Band to the improvement of CSR message format, and they represent the maximum transmission power of each frequency range in sub-district of the identifier of the tabulation of frequency range or quantity, frequency range and base station or the cell set respectively.Maximum transmission power for example can be described according to the mode shown in the table 4:

Table 4

IE/Group?Name	Presence	Range	?IE?Type?and?Reference	Semantics?Description
					Maximum Transmission?Power for?the?Band			?INTEGER?(0..500)	Unit: dBm scope: 0..50dBm unit's stepping length: 0.1dB

Enter step 370 subsequently.In this step, radio network controller (RNC) sends CSR message as shown in table 3 by Iub interface to the base station.

Then, in step 380, the base station receives the CSR message from radio network controller (RNC).

Enter step 390 subsequently.In this step, the maximum transmission power (43.80dBm for calculating in the step 310 in the present embodiment) as the A frequency range of primary band is extracted in the base station from the CSR message that receives, and the maximum transmission power of base station down link channel (for example downlink pilot frequency channel (DwPCH) and master-Common Control Physical Channel (PCCPCH)) is set at is no more than this maximum downlink power capacity, i.e. 43.80dBm.

Fig. 4 is according to the radio network controller of another embodiment of the present invention and the schematic diagram of base station, and this radio network controller and base station are used to the cell setting downlink channel power that uses a plurality of frequency ranges.

As shown in Figure 4, radio network controller 410 comprises receiving element 411, determining unit 412 and transmitting element 413.Receiving element 411 through the IuB interface receive from base station 420 with a plurality of frequency ranges at least one (for example primary band A) relevant power parameter.This power parameter for example can be the maximum downlink power capacity described in the top embodiment, and can be included in the base station in the resource status Indication message that radio network controller sends according to the form shown in above-mentioned table 1 and 2.Determining unit 412 is determined power setting according to the power parameter that receiving element 411 receives, its mode for example can adopt and above-mentioned steps 350 same or analogous modes, particularly, radio network controller 410 really order unit 412 maximum transmission power of the downlink channel of base station can be set at the maximum downlink power capacity that is no more than primary band.Subsequently, radio network controller 410 sends the maximum transmission power of above-mentioned power setting or setting by transmitting element 413 to base station 420 through Iub interface.Its send mode for example can be above-mentioned power to be included in the sub-district according to the form shown in table 3 and 4 set up in the request message and this message is sent to the base station.

As shown in Figure 4, base station 420 comprises transmitting element 421, receiving element 422 and setup unit 423.Transmitting element 421 through Iub interface to radio network controller 410 send with a plurality of frequency ranges at least one (for example primary band A) relevant power parameter.This power parameter for example can be a maximum downlink power capacity recited above, and its send mode for example can adopt and above-mentioned steps 320 same or analogous modes.Receiving element 422 receives the maximum transmission power of the downlink channel of being set by determining unit 412 from radio network controller 410 through Iub interface.As mentioned above, the maximum transmission power of this setting for example can be included in radio network controller and sets up in the request message to the sub-district that the base station sends.The power setting that setup unit 423 receives according to receiving element 422 is set the maximum transmission power of the downlink channel of base station, and its mode is for example described same or similar with above-mentioned steps 390.

Below set forth the advantage of the above embodiment of the present invention.According to the above embodiment of the present invention, in order to set the power of down link, the base station only needs to provide the power parameter (for example maximum downlink power capacity and maximum transmission power) of primary band to get final product to radio network controller (RNC), and radio network controller (RNC) can reasonably be set the power of down link according to this power parameter.With example shown in Figure 2 above-mentioned advantage is described below.

Suppose for remote radio unit (RRU) RRU1, its every the required maximum transmission power of passage is 3 watts, for remote radio unit (RRU) RRU2, its every the required maximum transmission power of passage is 5 watts, then can get according to above-mentioned formula, the maximum downlink power capacity of A frequency range (primary band) and F-band (auxiliary frequency range) is respectively 43.80dBm and 46.02dBm.According to prior art, to the power parameter of radio network controller (RNC) report be do not distinguish frequency range (also i.e. report be A frequency range and F-band maximum transmission power linearity and, here be (8 * 3+8 * 5)=64 watts), what the formula above therefore utilizing calculated is the overall power parameter of all frequency ranges, i.e. 30+10 * log (8 * 3+8 * 5)=48.06dBm.

In an embodiment of the present invention, power parameter is the frequency-division section report, and this makes radio network controller base station down link channel (for example downlink pilot frequency channel (DwPCH) and master-Common Control Physical Channel (PCCPCH)) to be set at according to the power parameter of primary band and is not more than 43.80dBm.Because downlink channel only is positioned at primary band, therefore above-mentioned set point can guarantee the power demand of downlink channel just, and the set point of any 43.80dBm of being higher than (for example 46.02dBm of auxiliary frequency range or the 48.06dBm when considering the overall power parameter) all will be unnecessary and rises to the power capacity of base station reservation unreasonably.

On the other hand, suppose for remote radio unit (RRU) RRU1, its every the required maximum transmission power of passage is 5 watts, for remote radio unit (RRU) RRU2, its every the required maximum transmission power of passage is 3 watts, then can get according to above-mentioned formula, the maximum downlink power capacity of A frequency range (primary band) and F-band (auxiliary frequency range) is respectively 46.02dBm and 43.80dBm.The overall power parameter of all frequency ranges still is 48.06dBm.

According to embodiments of the invention, radio network controller is set at base station down link channel (for example downlink pilot frequency channel (DwPCH) and master-Common Control Physical Channel (PCCPCH)) according to the power parameter of primary band and is not more than the power demand of 46.02dBm with lucky assurance downlink channel, and the set point of any 46.02dBm of being higher than (48.06dBm when for example considering the overall power parameter) will unnecessarily rise to the power capacity that the base station keeps, and the set point of any 48.06dBm of being lower than (for example power parameter 43.80dBm of F-band) can not guarantee that downlink channel has enough power capacities.

In the superincumbent description,, some details have been done elaboration in conjunction with embodiments of the invention for providing to enough understanding of the present invention.But it will be understood by those skilled in the art that the present invention need not these specific details and can put into practice.And, it will be understood by those skilled in the art that the embodiment of above-mentioned example does not limit scope of the present invention, and will understand various modifications, be equal to and replace and combination all belongs to scope of the present invention the embodiment that is disclosed.At last, cause unnecessary difficulty, be not shown specifically or describe the operation and/or the process of well-known unit for fear of the understanding of the present invention.Those skilled in the art will understand, even in aforementioned description, set forth various embodiment of the present invention and advantage, above-mentioned announcement is still just schematic, and can change in detail, yet these variations still belong in the recapitulative principle of the present invention.In a word, the spirit and scope of the present invention are limited by appended claims.

Claims (22)

1. method of carrying out the power setting of downlink channel in radio network controller for the sub-district of using a plurality of frequency ranges, this method comprises the following steps:

From the base station receive with described a plurality of frequency ranges at least one relevant power parameter;

According to described a plurality of frequency ranges at least one relevant power parameter determine described power setting; And

Send described power setting to described base station.

2. the method for claim 1, wherein described power parameter is at least one the maximum downlink power capacity in described a plurality of frequency range.

3. the method for claim 1, wherein described power parameter is included in from described base station to the resource status Indication message that described radio network controller sends.

4. method as claimed in claim 2, wherein, if in described sub-district, adopt diversity mode, then the maximum downlink power capacity of at least one of described a plurality of frequency ranges equal all branches each maximum power capabilities linearity and.

5. at least one in the method for claim 1, wherein described a plurality of frequency ranges is the primary band in the TD-SCDMA communication system.

6. one kind is the method for the power of the cell setting downlink channel that uses a plurality of frequency ranges in the base station, and this method comprises the following steps:

To radio network controller send with described a plurality of frequency ranges at least one relevant power parameter;

Receive the power setting of described downlink channel from described radio network controller; And

Set the power of described downlink channel according to described power setting.

7. method as claimed in claim 6, wherein, described power parameter is at least one the maximum downlink power capacity in described a plurality of frequency range.

8. method as claimed in claim 6, wherein, described power parameter is included in from described base station to the resource status Indication message that described radio network controller sends.

9. method as claimed in claim 7, wherein, if in described sub-district, adopt diversity mode, then the maximum downlink power capacity of at least one of described a plurality of frequency ranges equal all branches each maximum power capabilities linearity and.

10. method as claimed in claim 6, wherein, at least one in described a plurality of frequency ranges is the primary band in the TD-SCDMA communication system.

11. method as claimed in claim 10, wherein, described base station is based on the distributed structure/architecture that comprises base station unit and a plurality of remote radio unit (RRU)s, and described power parameter is determined by following formula:

$\mathrm{PowerPara}=30+10\×\log \left(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{p}_i\right)$

Wherein, PowerPara is described power parameter, and n is the quantity that works in the passage that the described remote radio unit (RRU) on one of them described frequency range comprises, p _iFor watt being i the maximum transmission power that passage is required of unit.

12. a radio network controller that is used to the sub-district of using a plurality of frequency ranges to carry out the power setting of downlink channel comprises:

Receiving element is used for from base station reception at least one relevant power parameter with described a plurality of frequency ranges;

Determining unit is used for according to determining described power setting with at least one relevant power parameter of described a plurality of frequency ranges; And

Transmitting element is used for sending described power setting to described base station.

13. radio network controller as claimed in claim 12, wherein, described power parameter is at least one the maximum downlink power capacity in described a plurality of frequency range.

14. radio network controller as claimed in claim 12, wherein, described power parameter is included in from described base station to the resource status Indication message that described radio network controller sends.

15. radio network controller as claimed in claim 13, wherein, if in described sub-district, adopt diversity mode, then the maximum downlink power capacity of at least one of described a plurality of frequency ranges equal all branches each maximum power capabilities linearity and.

16. radio network controller as claimed in claim 12, wherein, at least one in described a plurality of frequency ranges is the primary band in the TD-SCDMA communication system.

17. a base station that is used to the power of the cell setting downlink channel that uses a plurality of frequency ranges comprises:

Transmitting element is used for to radio network controller transmission at least one relevant power parameter with described a plurality of frequency ranges;

Receiving element is used for receiving from described radio network controller the power setting of described downlink channel; And

Setup unit is used for setting according to described power setting the power of described downlink channel.

18. base station as claimed in claim 17, wherein, described power parameter is at least one the maximum downlink power capacity in described a plurality of frequency range.

19. base station as claimed in claim 17, wherein, described power parameter is included in from described base station to the resource status Indication message that described radio network controller sends.

20. base station as claimed in claim 18, wherein, if in described sub-district, adopt diversity mode, then the maximum downlink power capacity of at least one of described a plurality of frequency ranges equal all branches each maximum power capabilities linearity and.

21. base station as claimed in claim 17, wherein, at least one in described a plurality of frequency ranges is the primary band in the TD-SCDMA communication system.

22. base station as claimed in claim 21, wherein, described base station is based on the distributed structure/architecture that comprises base station unit and a plurality of remote radio unit (RRU)s, and described power parameter is determined by following formula:

$\mathrm{PowerPara}=30+10\×\log \left(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{p}_i\right)$

Wherein, PowerPara is described power parameter, and n is the quantity that works in the passage that the described remote radio unit (RRU) on one of them described frequency range comprises, p _iFor watt being i the maximum transmission power that passage is required of unit.

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