CN100574493C - Channel emitting power configuring method and device thereof - Google Patents
Channel emitting power configuring method and device thereof Download PDFInfo
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- CN100574493C CN100574493C CNB2007101541989A CN200710154198A CN100574493C CN 100574493 C CN100574493 C CN 100574493C CN B2007101541989 A CNB2007101541989 A CN B2007101541989A CN 200710154198 A CN200710154198 A CN 200710154198A CN 100574493 C CN100574493 C CN 100574493C
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention discloses a kind of channel emitting power configuring method and device thereof, in order to realize to be the suitable public channel transmissive power of commonality schemata cell configuration according to the adjacent area number that adopts commonality schemata, enable to be the lower public channel transmissive power of commonality schemata cell configuration more for a long time, save power resource at the adjacent area number that adopts commonality schemata; At the adjacent area number that adopts commonality schemata is the higher public channel transmissive power of commonality schemata cell configuration more after a little while, improves the user who is in cell edge and receives professional quality.This method comprises: determine in all adjacent areas of commonality schemata sub-district, adopt the adjacent area number of commonality schemata; Determine the public channel transmissive power adjusted value of this sub-district according to described adjacent area number; Determine the difference of common signal channel normal transmission power and described public channel transmissive power adjusted value, the public channel transmissive power of described commonality schemata sub-district is configured to described difference.
Description
Technical field
The present invention relates to moving communicating field, particularly the configuring technical of channel emission power.
Background technology
In the existing mobile communication technology, it is to send a business datum and received by all the common service users in the sub-district by a common signal channel in the sub-district that some professional transmission technologies are arranged.Such as the broadcast multi-broadcasting technology is exactly by sharing a transmission link, multimedia data broadcast or be multicasted to portable terminal.
Consulting broadcast multi-broadcasting architecture simplified model shown in Figure 1, is the operation principle of example explanation broadcast multi-broadcasting technology with the MBMS in the broadcast multi-broadcasting technology (Multimedia Broadcast Multicast Service, multimedia broadcast multicast) technology.To being in the user of same sub-district, only transmission is a in core net (the BroadCast MultiCast Service center is to service universal packet wireless business affair access node among Fig. 1) with the MBMS business datum for the MBMS technology, being chosen in air interface according to the professional sending mode of the MBMS in the sub-district in UTRAN (UMTS Terrestrial Radio Access Network, public mobile communication system land radio access web) sends a or many parts.
In UTRAN, the MBMS business datum can adopt different physical channels to send.When sending the MBMS business datum, be called PTP (Point to Point, point-to-point) pattern by descending DPCH (Dedicated Physical Channel, DPCH); When sending the MBMS business datum, be called PTM (Point to Multipoint puts multiple spot) pattern by SCCPCH (Secondary CommonControl Physical Channel, Secondary Common Control Physical Channel).
When a sub-district adopts ptp mode to send the MBMS business datum, need all set up a descending DPCH to each MBMS common service user, the MBMS business datum umber of transmission is identical with number of users.Each bar DPCH will consume a channel code resource and corresponding power resource.But the transmitting power of every DPCH can be adjusted in real time according to the channel circumstance of user present position, in the sub-district number of users after a little while, sending the gross power that the MBMS business datum consumed may be lower.
When a sub-district adopted the PTM pattern to send the MBMS business datum, only need set up a SCCPCH just can be for all MBMS common service users in this sub-district provide service, and the MBMS business datum that sends in the whole sub-district has only portion.This pattern can be saved down channel sign indicating number resource.But this pattern need be the enough big transmitting power of SCCPCH configuration, can reach the scope of expection to guarantee coverage.The power system capacity of this pattern is not limited by the number of users purpose.
When the professional emission mode of the MBMS of adjacent area not simultaneously, be that the PTM pattern is adopted and its adjacent area employing ptp mode in this sub-district, the user of PTM mode cell can only receive the SCCPCH of this sub-district so, can not carry out link to the SCCPCH of other sub-district and merge, thereby make the user who is in PTM mode cell edge receive the second-rate of MBMS business.If improve user's quality of service, need to improve the transmitting power of SCCPCH.
For the sub-district of adopting the PTM pattern, if the PTM pattern is also adopted in its adjacent area, the user in these sub-districts can receive many SCCPCH so, thereby realize the link of SCCPCH is merged, improve the professional quality of reception, also can reduce the SCCPCH channel emission power, save power.
In the prior art, be generally the fixing transmitting power of SCCPCH channel configuration of carrying MBMS business under the PTM pattern.When this constant power collocation method can not be taken into account the adjacent area data variation that adopts the PTM pattern to the variation of transmit power needs, may produce following irrational situation: when the SCCPCH power configuration is big, if adopt the adjacent area number of PTM pattern to increase, then can produce bigger power dissipation; When the SCCPCH power configuration was low, if adopt the adjacent area number of PTM pattern to reduce, the quality that then can make the user of cell edge receive the MBMS business reduced.
Not only there is above problem in the configuration of the SCCPCH channel power of MBMS business, send a business datum by a common signal channel and also there is similar problem in the professional transmission technology that received by all common service users in the sub-district for those: after the fixing transmitting power of the common signal channel configuration of sub-district, when this district common channel power configuration is big, increase if adopt identical common signal channel to carry out the professional adjacent area number that sends, then can produce bigger power dissipation; When this district common channel power configuration is low, reduce if adopt identical common signal channel to carry out the professional adjacent area number that sends, then can make the user of cell edge receive professional quality and reduce.
Summary of the invention
The embodiment of the invention provides a kind of collocation method and device of channel emission power, in order to realize that according to the adjacent area number that adopts commonality schemata be the suitable public channel transmissive power of commonality schemata cell configuration.
For solving the problems of the technologies described above, the embodiment of the invention provides following technical scheme:
A kind of channel emitting power configuring method that the embodiment of the invention provides may further comprise the steps:
Determine in all adjacent areas of commonality schemata sub-district, adopt the adjacent area number of commonality schemata;
Determine the public channel transmissive power adjusted value of this commonality schemata sub-district according to described adjacent area number;
Determine the difference of common signal channel normal transmission power and described public channel transmissive power adjusted value, and the public channel transmissive power of described commonality schemata sub-district is configured to described difference, wherein, described common signal channel normal transmission power is when not adopting the adjacent area of commonality schemata in described all adjacent areas, the public channel transmissive power of this commonality schemata sub-district.
A kind of channel emission power inking device that the embodiment of the invention provides comprises:
The number determining unit is used for determining all adjacent areas of commonality schemata sub-district, adopts the adjacent area number of commonality schemata;
The adjusted value determining unit, the adjacent area number that is used for the employing commonality schemata determined according to described number determining unit is determined the public channel transmissive power adjusted value of this commonality schemata sub-district;
The transmitting power dispensing unit, be used for determining the difference of common signal channel normal transmission power and described public channel transmissive power adjusted value, and the public channel transmissive power of described commonality schemata sub-district is configured to described difference, wherein, described common signal channel normal transmission power is when not adopting the adjacent area of commonality schemata in described all adjacent areas, the public channel transmissive power of this commonality schemata sub-district.
A kind of radio network controller that comprises above-mentioned channel emission power inking device that the embodiment of the invention also provides.
Compare with existing fixed configuration of transmit power method, channel emitting power configuring method that the embodiment of the invention provides and device thereof, by public channel transmissive power adjusted value according to the definite sub-district of the adjacent area number that adopts commonality schemata, and common signal channel normal transmission power, dispose the public channel transmissive power of this sub-district, can be according to the variation of the adjacent area number that adopts commonality schemata, configuration flexibly, adjust the public channel transmissive power of sub-district, avoided the fixed configurations mode can not adapt to/take into account of the variation of commonality schemata adjacent area number of variations transmit power needs.And then make to be the lower public channel transmissive power of commonality schemata cell configuration more for a long time at the adjacent area number that adopts commonality schemata, saved power resource; At the adjacent area number that adopts commonality schemata is the higher public channel transmissive power of commonality schemata cell configuration more after a little while, has improved the user who is in cell edge and has received professional quality.
Description of drawings
Fig. 1 is a broadcast multi-broadcasting architectural schematic in the prior art;
Fig. 2 is a channel emitting power configuring method flow chart in the embodiment of the invention;
Fig. 3 is the channel emitting power configuring method flow chart of the embodiment of the invention one;
Fig. 4 is the channel emitting power configuring method flow chart of the embodiment of the invention two;
Fig. 5 is the channel emitting power configuring method flow chart of the embodiment of the invention three;
Fig. 6 is the channel emitting power configuring method flow chart of the embodiment of the invention four;
Fig. 7 is a channel emission power inking device schematic diagram in the embodiment of the invention;
Fig. 8,9,10,11 is an adjusted value determining unit schematic diagram in the embodiment of the invention.
Embodiment
Before the scheme that the embodiment of the invention is provided is described in detail, among at first clear and definite each embodiment with the notion that occurs:
In the various embodiments of the present invention, various public channel transmissive powers and various public channel transmissive power adjusted value all are unit with dB.
In professional sending mode, will in the sub-district, only send a business datum and receive the pattern that this professional user receives by in this sub-district all and abbreviate commonality schemata as.Abbreviate the commonality schemata sub-district as with adopting commonality schemata to send professional sub-district, the channel that sends business datum during with the employing commonality schemata abbreviates common signal channel as.The business that adopts commonality schemata to send is called common service.The common signal channel that common service user in a sub-district has the adjacent area carries out the function that link merges.For example, the PTM pattern in the MBMS service technique just belongs to commonality schemata, and the SCCPCH channel that the PTM pattern adopts just belongs to common signal channel, and the PTM sub-district just belongs to the commonality schemata sub-district, and the MBMS business that adopts the PTM pattern to send just belongs to common service.
A common signal channel only need be set up in the commonality schemata sub-district just can be for all common service users in this sub-district provide service, and still, common signal channel need dispose enough big transmitting power could guarantee that all common service users can both obtain service in this sub-district; And, when common signal channel disposes bigger fixed transmission power,, then can produce bigger power dissipation if adopt the adjacent area number of commonality schemata to increase; When the lower constant power of common signal channel configuration, if adopt the adjacent area number of commonality schemata to reduce, the quality that then can make the user of cell edge receive common service reduces.
Therefore, the embodiment of the invention for can be according to the adjacent area number that adopts commonality schemata be changed to the suitable public channel transmissive power of commonality schemata cell configuration, a kind of collocation method of channel emission power has been proposed, solve the defective that the existing fixed configuration mode exists, and then can be the lower public channel transmissive power of commonality schemata cell configuration more for a long time at the adjacent area number that adopts commonality schemata, be the higher public channel transmissive power of commonality schemata cell configuration at the adjacent area number that adopts commonality schemata more after a little while.
Consult shown in Figure 2ly, the channel emitting power configuring method that the embodiment of the invention provides can may further comprise the steps:
S201, determine in all adjacent areas of commonality schemata sub-district, adopt the adjacent area number of commonality schemata.
S202, determine the public channel transmissive power adjusted value of this commonality schemata sub-district according to the adjacent area number that adopts commonality schemata.
S203, determine the difference of common signal channel normal transmission power and this public channel transmissive power adjusted value, the public channel transmissive power of this commonality schemata sub-district is configured to this difference.Wherein, common signal channel normal transmission power is the parameter that sets in advance, and its value is when not adopting the adjacent area of commonality schemata in all adjacent areas of commonality schemata sub-district, the public channel transmissive power of this commonality schemata sub-district.
Among the S203, also can directly the public channel transmissive power of this commonality schemata sub-district be configured to the difference of common signal channel normal transmission power and public channel transmissive power adjusted value, but come to be this commonality schemata cell configuration transmitting power according to the magnitude relationship of this difference and predefined public channel transmissive power threshold value, promptly after the difference of determining common signal channel normal transmission power and public channel transmissive power adjusted value:
Judge the magnitude relationship of this difference and predefined public channel transmissive power threshold value, wherein, the public channel transmissive power threshold value can arbitrarily be set as required;
When this difference during, the public channel transmissive power of this commonality schemata sub-district is configured to this difference greater than this threshold value; When this difference is less than or equal to this threshold value, the public channel transmissive power of this commonality schemata sub-district is configured to this threshold value.
When a certain common service needed the public channel transmissive power minimum of commonality schemata sub-district to be this threshold value, this kind configuration mode can guarantee to satisfy the demand of this common service.
Among the S202, when determining the public channel transmissive power adjusted value of commonality schemata sub-district according to the adjacent area number that adopts commonality schemata, can be with reference to some preset parameters.According to the difference of reference parameter, it determines that method can comprise following several embodiment:
Mode one,
This kind mode merges power bias with reference to predefined first.
First to merge power bias be that the public channel transmissive power of commonality schemata sub-district can the reduction amount when adopting one of the every increase of adjacent area number of commonality schemata.Also can be understood as the maximum of public channel transmissive power can the reduction amount and the ratio of adjacent area total number.This maximum can the reduction amount be when commonality schemata is all adopted in all adjacent areas of commonality schemata sub-district, this district common channel transmitting power can the reduction amount.
When merging power bias with reference to first, the public channel transmissive power adjusted value of commonality schemata sub-district is the first merging power bias and the product that adopts the adjacent area number of commonality schemata.
As seen, when the adjacent area number that adopts commonality schemata was many, the public channel transmissive power adjusted value of commonality schemata sub-district was just bigger, and then normal transmission power was just smaller with the difference of being somebody's turn to do big adjusted value, thereby the public channel transmissive power of configuration is lower; When the adjacent area number that adopts commonality schemata was fewer, the public channel transmissive power adjusted value of commonality schemata sub-district was just less, and then normal transmission power is just smaller with the difference of this less adjusted value, thereby the public channel transmissive power of configuration is than higher.
Mode two,
The predefined following two class parameters of this kind mode reference:
The interval of the adjacent area number of a, employing commonality schemata.
The public channel transmissive power adjusted value that b, corresponding above-mentioned interval are set: corresponding each interval that adopts the adjacent area number of commonality schemata all is set with a public channel transmissive power adjusted value.When the adjacent area number that adopts commonality schemata was in a certain interval, the public channel transmissive power adjusted value of commonality schemata sub-district was the public channel transmissive power adjusted value corresponding with this interval.
During with reference to above two class parameters, the public channel transmissive power adjusted value of commonality schemata sub-district is: with the corresponding public channel transmissive power adjusted value of interval at the number place, adjacent area of adopting commonality schemata.
Wherein, adopt the interval of the adjacent area number of commonality schemata to divide as required, each interval common factor that do not have.For example, all adjacent area total numbers of supposing the commonality schemata sub-district are N, then can 0 and N between be divided into any a plurality of intervals that not do not occur simultaneously as required, can be that (m＜N) individual number is determined an interval to every m, also can arbitrarily delimit any a plurality of interval.
For the public channel transmissive power adjusted value of each interval correspondence, can determine to be applicable to the adjusted value of the public channel transmissive power adjusted value of all values in the interval according to balance principle for this interval correspondence; Also can determine according to the empirical value of statistics.
When determining the public channel transmissive power adjusted value of each interval correspondence according to balance principle, the public channel transmissive power adjusted value that can determine the interval correspondence is: the value and first that is in the interval centre position merges the product of power bias, first when merging power bias for one of the every increase of adjacent area number of adopting commonality schemata, and the public channel transmissive power of commonality schemata sub-district can the reduction amount.
For example an interval is [3,8), the number that then can determine to be in this interval centre position is 5, the public channel transmissive power adjusted value that calculates commonality schemata sub-district when 5 adjacent areas of adopting commonality schemata are arranged again is X, the public channel transmissive power adjusted value that this interval correspondence is set at last is X, like this, as long as adopt the adjacent area number of commonality schemata to be in [3,8) in, no matter adopting the adjacent area number of commonality schemata is 3,4,5,6 or 7, its public channel transmissive power adjusted value is all got X.
Determine the public channel transmissive power adjusted value of interval correspondence according to balance principle, can make public channel transmissive power and the actual needs of the final configuration in commonality schemata sub-district approaching as far as possible, customer service quality in the assurance commonality schemata sub-district.
When determining the public channel transmissive power adjusted value of each interval correspondence according to the empirical value of statistics, the public channel transmissive power adjusted value of each interval correspondence can meet the actual needs of commonality schemata sub-district better.
Shown in parameter signal table 1, the interval of supposing the adjacent area number is divided into n=0,0＜n＜3,3≤n＜6,6≤n＜9 etc., then when the adjacent area number that adopts commonality schemata was 0, the interval at its place was n=0, and corresponding public channel transmissive power adjusted value is 0; When the adjacent area number that adopts commonality schemata was 1 or 2, the interval at its place was 0＜n＜3, and corresponding public channel transmissive power adjusted value is a Δ 1.For other public channel transmissive power adjusted values that adopts the adjacent area number correspondence of commonality schemata, can obtain no longer superfluous stating successively here according to table 1.
And, the public channel transmissive power adjusted value of each the interval correspondence in the table 1 also can be to equate mutually, like this, no matter adopt the adjacent area number of commonality schemata what are, the public channel transmissive power adjusted value of commonality schemata sub-district all is a fixing value.
Table 1
Shown in parameter signal table 2, adopt the interval of the adjacent area number of commonality schemata also can have only two intervals, when the adjacent area number that adopts commonality schemata was less than or equal to q, corresponding public channel transmissive power adjusted value was 0, does not promptly adjust public channel transmissive power; When the adjacent area number that adopts commonality schemata during greater than q, corresponding public channel transmissive power adjusted value is a Δ 1.This kind mode also can be understood as has set a number threshold value q, when the adjacent area number that adopts commonality schemata does not surpass (promptly being less than or equal to) this number threshold value q, the public channel transmissive power of this commonality schemata sub-district is not adjusted, when the adjacent area of adopting commonality schemata outnumbers (promptly greater than) this number threshold value q, just the public channel transmissive power of this commonality schemata sub-district is adjusted, its adjustment amount all is a Δ 1.
Table 2
As seen, when the adjacent area number that adopts commonality schemata was many, the public channel transmissive power adjusted value of commonality schemata sub-district was just bigger, and then normal transmission power was just smaller with the difference of being somebody's turn to do big adjusted value, thereby the public channel transmissive power of configuration is lower; When the adjacent area number that adopts commonality schemata was fewer, the public channel transmissive power adjusted value of commonality schemata sub-district was just less, and then normal transmission power is just smaller with the difference of this less adjusted value, thereby the public channel transmissive power of configuration is than higher.
Mode three,
This kind mode merges power bias with reference to predefined second.
Second merges power bias: when promptly commonality schemata was all adopted in all adjacent areas, the public channel transmissive power of this commonality schemata sub-district can the reduction amount.
When merging power bias with reference to second, definite method of the public channel transmissive power adjusted value of this commonality schemata sub-district is:
Determine to adopt the adjacent area ratio of commonality schemata, its computational methods can for: adopt the adjacent area number of commonality schemata to account for the ratio value of all adjacent area total numbers, that is: adopt adjacent area number/all adjacent area numbers of commonality schemata;
The public channel transmissive power adjusted value of determining the commonality schemata sub-district is: second merges the product of the adjacent area ratio of power bias and employing commonality schemata.
As seen, when the adjacent area number that adopts commonality schemata more for a long time, described ratio is just bigger, the public channel transmissive power adjusted value is also bigger, thereby normal transmission power was just smaller with difference that should big adjusted value, thereby the public channel transmissive power of configuration is lower; When the adjacent area number that adopts commonality schemata more after a little while, described ratio is just less, the public channel transmissive power adjusted value is also less, thereby normal transmission power is just bigger with the difference of this less adjusted value, thereby the public channel transmissive power that disposes is than higher.
Mode four,
The predefined following two class parameters of this kind mode reference:
The interval of the adjacent area ratio of a, employing commonality schemata: adopt the adjacent area ratio of commonality schemata to be the ratio value that the adjacent area number that adopts commonality schemata accounts for all adjacent area numbers.
The public channel transmissive power adjusted value that b, corresponding above-mentioned interval are set: corresponding each interval that adopts the adjacent area ratio of commonality schemata all is set with a public channel transmissive power adjusted value.When the adjacent area ratio that adopts commonality schemata was in the interval, the public channel transmissive power adjusted value of commonality schemata sub-district was the public channel transmissive power adjusted value corresponding with this interval.
During with reference to above two class parameters, definite method of the public channel transmissive power adjusted value of commonality schemata sub-district is:
Determine to adopt the adjacent area ratio of commonality schemata, its computational methods are: adopt the adjacent area number of commonality schemata and the ratio value of all adjacent area numbers;
The public channel transmissive power adjusted value of determining the commonality schemata sub-district is: with the corresponding public channel transmissive power adjusted value of interval at the ratio place, adjacent area of adopting commonality schemata.
Wherein, adopt the interval of the adjacent area ratio of commonality schemata to divide as required, each interval common factor that do not have.For example can be divided into any a plurality of intervals that do not occur simultaneously between 0 and 1 as required, can be that (n＜m) determine an interval also can arbitrarily delimit any a plurality of interval to every n/m.
For the public channel transmissive power adjusted value of each interval correspondence, can determine to be applicable to the adjusted value of the public channel transmissive power adjusted value of all values in the interval according to balance principle for this interval correspondence; Also can determine according to the empirical value of statistics.
When determining the public channel transmissive power adjusted value of each interval correspondence according to balance principle, the public channel transmissive power adjusted value that can determine the interval correspondence is: the value and second that is in the interval centre position merges the product of power bias, second merges power bias when all adopting commonality schemata in all adjacent areas, and the public channel transmissive power of this commonality schemata sub-district can the reduction amount.
For example an interval is [1/6,5/6), the ratio value that then can determine to be in this interval centre position is 1/2, the adjacent area ratio of calculating the employing commonality schemata again is that the public channel transmissive power adjusted value of 1/2 o'clock commonality schemata sub-district is X, the public channel transmissive power adjusted value that this interval correspondence is set at last is X, like this, as long as adopt the adjacent area ratio of commonality schemata to be in [1/6,5/6) in, no matter adopting the adjacent area ratio of commonality schemata is 1/6,1/3,1/2 or 2/3, its public channel transmissive power adjusted value is all got X.
Determine the public channel transmissive power adjusted value of interval correspondence according to balance principle, can make public channel transmissive power and the actual needs of the final configuration in commonality schemata sub-district approaching as far as possible, customer service quality in the assurance commonality schemata sub-district.
When determining the public channel transmissive power adjusted value of each interval correspondence according to the empirical value of statistics, the public channel transmissive power adjusted value of each interval correspondence can meet the actual needs of commonality schemata sub-district better.
Shown in parameter signal table 3, equal 0, (0 if adopt the interval of the adjacent area ratio of commonality schemata to be divided into, 1/6), [1/6,1/2), [1/2,1) and equal 1, then when the adjacent area ratio that adopts commonality schemata was 0, the interval at its place was for equaling 0, and corresponding public channel transmissive power adjusted value is 0; When the adjacent area ratio that adopts commonality schemata was 0＜k＜1/6, the interval at its place was (0,1/6), and corresponding public channel transmissive power adjusted value is Δ a.For other public channel transmissive power adjusted values that adopts the adjacent area ratio correspondence of commonality schemata, can obtain no longer superfluous stating successively here according to table 2.
And the public channel transmissive power adjusted value of each the interval correspondence in the table 3 also can equate like this, no matter adopt the adjacent area number of commonality schemata what are, the public channel transmissive power adjusted value of commonality schemata sub-district all is a fixing value.
Table 3
Shown in parameter signal table 4, adopt the interval of the adjacent area ratio of commonality schemata also can have only two intervals, when the adjacent area ratio that adopts commonality schemata was less than or equal to p, corresponding public channel transmissive power adjusted value was 0, does not promptly adjust public channel transmissive power; When the adjacent area ratio that adopts commonality schemata during greater than p, corresponding public channel transmissive power adjusted value is a Δ 1.This kind mode also can be understood as has set a ratio threshold value p, when the adjacent area ratio that adopts commonality schemata does not surpass (promptly being less than or equal to) this ratio threshold value p, the public channel transmissive power of this commonality schemata sub-district is not adjusted, when the adjacent area ratio that adopts commonality schemata surpasses (promptly greater than) this ratio threshold value p, just the public channel transmissive power of this commonality schemata sub-district is adjusted, its adjustment amount all is a Δ 1.
Table 4
As seen, when the adjacent area number that adopts commonality schemata more for a long time, described ratio is just bigger, the public channel transmissive power adjusted value is also bigger, thereby normal transmission power was just smaller with difference that should big adjusted value, thereby the public channel transmissive power of configuration is lower; When the adjacent area number that adopts commonality schemata more after a little while, described ratio is just less, the public channel transmissive power adjusted value is also less, thereby normal transmission power is just bigger with the difference of this less adjusted value, thereby the public channel transmissive power that disposes is than higher.
Aforesaid way one, mode two, mode three and mode four determine that the method for the public channel transmissive power adjusted value of commonality schemata sub-district has nothing in common with each other, and can select suitable definite mode according to actual conditions.
Be example with PTM pattern in the MBMS business and SCCPCH channel thereof more below, the collocation method of the commonality schemata transmitting power that the detailed description embodiment of the invention provides.
Embodiment one
Consult shown in Figure 3ly, the embodiment of the invention one merges power bias and SCCPCH channel emission power threshold value with reference to predefined first, is following being gone back of idiographic flow of the SCCPCH channel configuration transmitting power of PTM mode cell:
S301, determine in the adjacent area of PTM mode cell, adopt the adjacent area number n1 of PTM pattern;
S302, determine that the SCCPCH channel emission power adjusted value of this sub-district is Δ P1*n1, wherein Δ P1 first merges power bias;
The difference of S303, the SCCPCH channel normal transmission power of determining this sub-district and SCCPCH channel emission power adjusted value is P-Δ P1*n1, and wherein, P is the SCCPCH channel normal transmission power of this sub-district;
S304, judge that whether P-Δ P1*n1 is greater than SCCPCH channel emission power threshold value;
If, execution in step S305 then: the SCCPCH channel emission power of this sub-district is configured to P-Δ P1*n1;
If not, execution in step S306 then: the SCCPCH channel emission power of this sub-district is configured to SCCPCH channel emission power threshold value.
As seen, in the embodiment of the invention one, when the adjacent area number that adopts the PTM pattern is many, the SCCPCH channel emission power adjusted value of PTM mode cell is just bigger, then normal transmission power was just smaller with the difference of being somebody's turn to do big adjusted value among the S303, thereby in S305, as P-Δ P1*n1 during greater than SCCPCH channel emission power threshold value, the SCCPCH channel emission power of configuration is just lower; When the adjacent area number that adopts the PTM pattern is fewer, the SCCPCH channel emission power adjusted value of PTM mode cell is just less, then normal transmission power is just smaller with the difference of this less adjusted value among the S303, thereby in S305, as P-Δ P1*n1 during greater than SCCPCH channel emission power threshold value, the SCCPCH channel emission power of configuration is just than higher.
In the embodiment of the invention one, can not judge that also whether P-Δ P1*n1 is greater than SCCPCH channel emission power threshold value, and directly the SCCPCH channel emission power of this sub-district is configured to P-Δ P1*n1, so more direct convenience be the more suitable SCCPCH channel emission power of cell configuration.
Embodiment two
Consult shown in Figure 4ly, the embodiment of the invention two merges power bias with reference to predefined second and SCCPCH channel emission power threshold value is following being gone back of idiographic flow of the SCCPCH channel configuration transmitting power of PTM mode cell:
S401, determine in the adjacent area of PTM mode cell, adopt the adjacent area number n2 of PTM pattern;
S402, determine in the adjacent area of this sub-district that adopt the adjacent area ratio n2/N of PTM pattern, wherein N is the total number of all adjacent areas of this sub-district;
S403, determine that the SCCPCH channel emission power adjusted value of this sub-district is Δ P2*n2/N, wherein Δ P2 second merges power bias;
The difference of S404, the SCCPCH channel normal transmission power of determining this sub-district and SCCPCH channel emission power adjusted value is P-Δ P2*n2/N, and wherein P is the SCCPCH channel normal transmission power of this sub-district;
S405, judge that whether P-Δ P2*n2/N is greater than SCCPCH channel emission power threshold value;
If, execution in step S406 then: the SCCPCH channel emission power of this sub-district is configured to P-Δ P2*n2/N;
If not, execution in step S407 then: the SCCPCH channel emission power of this sub-district is configured to SCCPCH channel emission power threshold value.
As seen, in the embodiment of the invention two, when the adjacent area number that adopts the PTM pattern more for a long time, described ratio is just bigger, SCCPCH channel emission power adjusted value is also bigger, thereby normal transmission power was just smaller with the difference of being somebody's turn to do big adjusted value, thereby in S406, as P-Δ P2*n2/N during greater than SCCPCH channel emission power threshold value, the SCCPCH channel emission power of configuration is lower; When the adjacent area number that adopts the PTM pattern more after a little while, described ratio is just less, SCCPCH channel emission power adjusted value is also less, thereby normal transmission power is just bigger with the difference of this less adjusted value, thereby in S406, as P-Δ P2*n2/N during greater than SCCPCH channel emission power threshold value, the SCCPCH channel emission power of configuration is just than higher.
In the embodiment of the invention two, can not judge that also whether P-Δ P2*n2/N is greater than SCCPCH channel emission power threshold value, and directly the SCCPCH channel emission power of this sub-district is configured to P-Δ P2*n2/N, so more direct convenience be the more suitable SCCPCH channel emission power of cell configuration.
Embodiment three
Public channel transmissive power adjusted value and SCCPCH channel emission power threshold value that the embodiment of the invention three is set with reference to the interval of the adjacent area number of predefined employing commonality schemata, corresponding above-mentioned interval, be the SCCPCH channel configuration transmitting power of PTM mode cell, wherein:
Suppose that be set with m interval that adopts the adjacent area number of commonality schemata, each interval is different; Accordingly, be set with m public channel transmissive power adjusted value, the respectively corresponding interval of each public channel transmissive power adjusted value.
Consult shown in Figure 5ly, the embodiment of the invention three is that the concrete configuration flow process of SCCPCH channel configuration transmitting power of PTM mode cell is as described below:
S501, determine in the adjacent area of PTM mode cell, adopt the adjacent area number n3 of PTM pattern;
S502, when n3 is in the interval of adjacent area number of a certain employing PTM pattern, determine that the SCCPCH channel emission power adjusted value of this sub-district is the SCCPCH channel emission power adjusted value Δ P3 corresponding with this interval;
The difference of S503, the SCCPCH channel normal transmission power of determining this sub-district and SCCPCH channel emission power adjusted value is P-Δ P3, and P is the SCCPCH channel normal transmission power of this sub-district;
S504, judge that whether P-Δ P3 is greater than SCCPCH channel emission power threshold value;
If, execution in step S505 then: the SCCPCH channel emission power of this sub-district is configured to P-Δ P3;
If not, execution in step S506 then: the SCCPCH channel emission power of this sub-district is configured to SCCPCH channel emission power threshold value.
As seen, in the embodiment of the invention three, when the adjacent area number that adopts the PTM pattern is many, the SCCPCH channel emission power adjusted value of PTM mode cell is just bigger, then normal transmission power was just smaller with the difference of being somebody's turn to do big adjusted value among the S503, thereby in S505, as P-Δ P3 during greater than SCCPCH channel emission power threshold value, the SCCPCH channel emission power of configuration is just lower; When the adjacent area number that adopts the PTM pattern is fewer, the SCCPCH channel emission power adjusted value of PTM mode cell is just less, then normal transmission power is just smaller with the difference of this less adjusted value among the S503, thereby in S505, as P-Δ P3 during greater than SCCPCH channel emission power threshold value, the SCCPCH channel emission power of configuration is just than higher.
In the embodiment of the invention three, can not judge that also whether P-Δ P3 is greater than SCCPCH channel emission power threshold value, and directly the SCCPCH channel emission power of this sub-district is configured to P-Δ P3, so more direct convenience be the more suitable SCCPCH channel emission power of cell configuration.
Embodiment four
Public channel transmissive power adjusted value and SCCPCH channel emission power threshold value that the embodiment of the invention four is set with reference to the interval of the adjacent area ratio of predefined employing commonality schemata, corresponding above-mentioned interval, be the SCCPCH channel configuration transmitting power of PTM mode cell, wherein:
Suppose that be set with m interval that adopts the adjacent area ratio of commonality schemata, each interval is different; Accordingly, be set with m public channel transmissive power adjusted value, all corresponding interval of each public channel transmissive power adjusted value.
Consult shown in Figure 6ly, the embodiment of the invention four is that the concrete configuration flow process of SCCPCH channel configuration transmitting power of PTM mode cell is as described below:
S601, determine in the adjacent area of PTM mode cell, adopt the adjacent area number n4 of PTM pattern;
S602, determine in the adjacent area of this sub-district that adopt the adjacent area ratio n4/N of PTM pattern, wherein N is the adjacent area total number;
S603, when n4/N is in one when adopting in the interval of adjacent area ratio of PTM pattern, determine that the SCCPCH channel emission power adjusted value of this sub-district is the SCCPCH channel emission power adjusted value Δ P4 corresponding with this interval;
The difference of S604, the SCCPCH channel normal transmission power of determining this sub-district and SCCPCH channel emission power adjusted value is P-Δ P4, and P is the SCCPCH channel normal transmission power of this sub-district;
S605, judge that whether P-Δ P4 is greater than SCCPCH channel emission power threshold value;
If, execution in step S606 then: the SCCPCH channel emission power of this sub-district is configured to P-Δ P4;
If not, execution in step S607 then: the SCCPCH channel emission power of this sub-district is configured to SCCPCH channel emission power threshold value.
As seen, in the embodiment of the invention four, when the adjacent area number that adopts the PTM pattern more for a long time, described ratio is just bigger, SCCPCH channel emission power adjusted value is also bigger, thereby normal transmission power was just smaller with the difference of being somebody's turn to do big adjusted value, thereby in S606, as P-Δ P4 during greater than SCCPCH channel emission power threshold value, the SCCPCH channel emission power of configuration is lower; When the adjacent area number that adopts the PTM pattern more after a little while, described ratio is just less, SCCPCH channel emission power adjusted value is also less, thereby normal transmission power is just bigger with the difference of this less adjusted value, thereby in S606, as P-Δ P4 during greater than SCCPCH channel emission power threshold value, the SCCPCH channel emission power of configuration is just than higher.
In the embodiment of the invention four, can not judge that also whether P-Δ P4 is greater than SCCPCH channel emission power threshold value, and directly the SCCPCH channel emission power of this sub-district is configured to P-Δ P4, so more direct convenience be the more suitable SCCPCH channel emission power of cell configuration.
More than each embodiment for example understand when the channel emitting power configuring method that utilizes the embodiment of the invention to provide, the concrete configuration process of the SCCPCH channel emission power of PTM pattern in the MBMS service technique, for the idiographic flow of the common signal channel configuration of transmit power of other business (such as the MBS business among the Wimax, other BroadCast MultiCast Service) described with the various embodiments described above.
It will be appreciated by those skilled in the art that in the collocation method of the channel emission power that the embodiment of the invention provides, all or part of step is to finish by the relevant hardware of program command, this program can be stored in the read/write memory medium, and read/write memory medium is random asccess memory, disk, CD etc. for example.After this program is by computer run, can paralleling abstracting database table data also further the data that extract be merged into a database table.
Consult shown in Figure 7ly, a kind of channel emission power inking device that the embodiment of the invention provides comprises:
Number determining unit 71 is used for determining all adjacent areas of commonality schemata sub-district, adopts the adjacent area number of commonality schemata;
Adjusted value determining unit 72, the adjacent area number that is used for the employing commonality schemata determined according to number determining unit 71 is determined the public channel transmissive power adjusted value of this commonality schemata sub-district;
Transmitting power dispensing unit 73, be used for determining the difference of common signal channel normal transmission power and public channel transmissive power adjusted value, and the public channel transmissive power of this commonality schemata sub-district is configured to this difference, wherein, common signal channel normal transmission power is when not adopting the adjacent area of commonality schemata in all adjacent areas, the public channel transmissive power of this commonality schemata sub-district.
Consult shown in Figure 7, a kind of channel emission power inking device that the embodiment of the invention provides can also comprise: judging unit 74 is used to judge the difference of the public channel transmissive power adjusted value that common signal channel normal transmission power and adjusted value determining unit 72 are determined and the magnitude relationship of predefined public channel transmissive power threshold value;
When a kind of channel emission power inking device that provides when the embodiment of the invention also comprises judging unit 74, when transmitting power dispensing unit 73 is judged this difference greater than this threshold value at judging unit 74, the public channel transmissive power of this commonality schemata sub-district is configured to this difference; When judging unit 74 is judged this difference and is less than or equal to this threshold value, the public channel transmissive power of this commonality schemata sub-district is configured to this threshold value.
Wherein, consult shown in Figure 8ly, adjusted value determining unit 72 further comprises:
The first biasing storing sub-units 81 is used to store first and merges power bias, and this is first when merging power bias for one of the every increase of adjacent area number of adopting commonality schemata, and the public channel transmissive power of commonality schemata sub-district can the reduction amount;
First adjusted value is determined subelement 82, is used for determining the public channel transmissive power adjusted value, and this adjusted value is the first merging power bias and the product that adopts the adjacent area number of commonality schemata.
Consult shown in Figure 9ly, adjusted value determining unit 72 can further include:
The second biasing storing sub-units 91 is used to store second and merges power bias, and this second merges power bias when all adopting commonality schemata in all adjacent areas, and the public channel transmissive power of this commonality schemata sub-district can the reduction amount;
First ratio value is determined subelement 92, is used for determining to adopt the adjacent area ratio of commonality schemata, and the adjacent area ratio that adopts commonality schemata is the ratio value that the adjacent area number of employing commonality schemata accounts for all adjacent area total numbers;
The 3rd adjusted value is determined subelement 93, is used for determining the public channel transmissive power adjusted value, and this adjusted value is the second merging power bias and the product that adopts the adjacent area ratio of commonality schemata.
Consult shown in Figure 10ly, adjusted value determining unit 72 can further include:
Storing sub-units 101 between number field, are used to store the interval of the adjacent area number that adopts commonality schemata;
Adjusted value storing sub-units 102 between number field is used to store each self-corresponding public channel transmissive power adjusted value of each above-mentioned interval;
Second adjusted value is determined subelement 103, is used for determining the public channel transmissive power adjusted value, and this adjusted value is the public channel transmissive power adjusted value corresponding to number place, the adjacent area interval that adopts commonality schemata.
Consult shown in Figure 11ly, adjusted value determining unit 72 can further include:
Storing sub-units 111 between the proportional band, are used to store the interval of the adjacent area ratio that adopts commonality schemata;
Adjusted value storing sub-units 112 between the proportional band is used to store each self-corresponding public channel transmissive power adjusted value of each above-mentioned interval;
Second ratio value is determined subelement 113, is used for determining to adopt the adjacent area ratio of commonality schemata, and the adjacent area ratio that adopts commonality schemata is the ratio value that the adjacent area number of employing commonality schemata accounts for all adjacent area total numbers;
The 4th adjusted value is determined subelement 114, is used for determining the public channel transmissive power adjusted value, and this adjusted value is the public channel transmissive power adjusted value corresponding to ratio place, the adjacent area interval that adopts commonality schemata.
The embodiment of the invention also provides a kind of radio network controller (RNC) (Radio Network Controller, radio network controller), this radio network controller is provided with all channel emission power inking devices that the embodiment of the invention provides, and the channel emitting power configuring method that this radio network controller is used for providing according to the embodiment of the invention is a commonality schemata cell configuration public channel transmissive power.
Channel emitting power configuring method that the embodiment of the invention provides and device thereof, the public channel transmissive power adjusted value of this sub-district of determining according to the adjacent area number that adopts commonality schemata, and common signal channel normal transmission power, dispose the public channel transmissive power of this sub-district, make to be the lower public channel transmissive power of commonality schemata cell configuration more for a long time at the adjacent area number that adopts commonality schemata, saved power resource; At the adjacent area number that adopts commonality schemata is the higher public channel transmissive power of commonality schemata cell configuration more after a little while, has improved the user who is in cell edge and has received professional quality.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (17)
1, a kind of channel emitting power configuring method is characterized in that, comprising:
Determine in all adjacent areas of commonality schemata sub-district, adopt the adjacent area number of commonality schemata;
Determine the public channel transmissive power adjusted value of this commonality schemata sub-district according to described adjacent area number;
Determine the difference of common signal channel normal transmission power and described public channel transmissive power adjusted value, and the public channel transmissive power of described commonality schemata sub-district is configured to described difference, wherein, described common signal channel normal transmission power is when not adopting the adjacent area of commonality schemata in described all adjacent areas, the public channel transmissive power of this commonality schemata sub-district.
2, the method for claim 1 is characterized in that, after determining described difference, described method also comprises:
Judge the magnitude relationship of described difference and predefined public channel transmissive power threshold value;
When described difference during, the public channel transmissive power of described commonality schemata sub-district is configured to described difference greater than described threshold value;
When described difference is less than or equal to described threshold value, the public channel transmissive power of described commonality schemata sub-district is configured to described threshold value.
3, the method for claim 1, it is characterized in that, described public channel transmissive power adjusted value determines that method comprises: determine that described public channel transmissive power adjusted value is the product of the adjacent area number of the first merging power bias and described employing commonality schemata, described first when merging power bias for one of the every increase of adjacent area number of adopting commonality schemata, and the public channel transmissive power of described commonality schemata sub-district can the reduction amount.
4, the method for claim 1 is characterized in that, definite method of described public channel transmissive power adjusted value comprises:
Do not have in the interval that occurs simultaneously at least two, determine the interval at number place, described adjacent area;
Determine that described public channel transmissive power adjusted value is: the predefined public channel transmissive power adjusted value of interval at number place, corresponding described adjacent area.
5, method as claimed in claim 4, it is characterized in that, definite method of the public channel transmissive power adjusted value of corresponding described each interval comprises: determine that described public channel transmissive power adjusted value is to be in the value in interval centre position and the product of the first merging power bias, described first when merging power bias for one of the every increase of adjacent area number of adopting commonality schemata, and the public channel transmissive power of described commonality schemata sub-district can the reduction amount.
6, the method for claim 1 is characterized in that, definite method of described public channel transmissive power adjusted value comprises:
Determine that described adjacent area number accounts for the ratio value of all adjacent area total numbers;
Determine that described public channel transmissive power adjusted value is: second merges the product of power bias and described ratio value, described second to merge power bias be described all adjacent areas when all adopting commonality schemata, and the public channel transmissive power of this commonality schemata sub-district can the reduction amount.
7, the method for claim 1 is characterized in that, definite method of described public channel transmissive power adjusted value comprises:
Determine that described adjacent area number accounts for the ratio value of all adjacent area total numbers;
Do not have in the interval that occurs simultaneously at least two, determine the interval at described ratio value place;
Determine that described public channel transmissive power adjusted value is: the interval at corresponding described ratio value place, predefined public channel transmissive power adjusted value.
8, method as claimed in claim 7, it is characterized in that, definite method of the public channel transmissive power adjusted value of corresponding described each interval comprises: determine that described public channel transmissive power adjusted value is to be in the value in interval centre position and the product of the second merging power bias, described second to merge power bias be described all adjacent areas when all adopting commonality schemata, and the public channel transmissive power of this commonality schemata sub-district can the reduction amount.
9, the method for claim 1 is characterized in that, described commonality schemata comprises point to multipoint mode, and described common signal channel comprises Secondary Common Control Physical Channel.
10, the method for claim 1 is characterized in that, described public channel transmissive power is for sending the public channel transmissive power of MBMS business.
11, a kind of channel emission power inking device is characterized in that, comprising:
The number determining unit is used for determining all adjacent areas of commonality schemata sub-district, adopts the adjacent area number of commonality schemata;
The adjusted value determining unit, the adjacent area number that is used for the employing commonality schemata determined according to described number determining unit is determined the public channel transmissive power adjusted value of this commonality schemata sub-district;
The transmitting power dispensing unit, be used for determining the difference of common signal channel normal transmission power and described public channel transmissive power adjusted value, and the public channel transmissive power of described commonality schemata sub-district is configured to described difference, wherein, described common signal channel normal transmission power is when not adopting the adjacent area of commonality schemata in described all adjacent areas, the public channel transmissive power of this commonality schemata sub-district.
12, device as claimed in claim 11 is characterized in that, described device also comprises:
Judging unit is used to judge the magnitude relationship of described difference and predefined public channel transmissive power threshold value;
Described transmitting power dispensing unit is configured to described difference with the public channel transmissive power of described commonality schemata sub-district when described judgment unit judges goes out described difference greater than described threshold value; When described judgment unit judges goes out described difference and is less than or equal to described threshold value, the public channel transmissive power of described commonality schemata sub-district is configured to described threshold value.
13, device as claimed in claim 11 is characterized in that, described adjusted value determining unit comprises:
The first biasing storing sub-units is used to store first and merges power bias, and described first when merging power bias for one of the every increase of adjacent area number of adopting commonality schemata, and the public channel transmissive power of commonality schemata sub-district can the reduction amount;
First adjusted value is determined subelement, is used for determining the public channel transmissive power adjusted value, and described adjusted value is the product of the adjacent area number of described first merging power bias and described employing commonality schemata.
14, device as claimed in claim 11 is characterized in that, described adjusted value determining unit comprises:
Storing sub-units between number field is used to store the interval of the adjacent area number that adopts commonality schemata;
Adjusted value storing sub-units between number field is used to store each self-corresponding public channel transmissive power adjusted value of each described interval;
Second adjusted value is determined subelement, is used for determining the public channel transmissive power adjusted value, and described adjusted value is the public channel transmissive power adjusted value corresponding to number place, the adjacent area interval of described employing commonality schemata.
15, device as claimed in claim 11 is characterized in that, described adjusted value determining unit comprises:
The second biasing storing sub-units is used to store second and merges power bias, and described second merges power bias when all adopting commonality schemata in all adjacent areas, and the public channel transmissive power of this commonality schemata sub-district can the reduction amount;
First ratio value is determined subelement, is used for determining to adopt the adjacent area ratio of commonality schemata, and the adjacent area ratio of described employing commonality schemata accounts for the ratio value of all adjacent area total numbers for the adjacent area number that adopts commonality schemata;
The 3rd adjusted value is determined subelement, is used for determining the public channel transmissive power adjusted value, and described adjusted value is the product of the adjacent area ratio of described second merging power bias and described employing commonality schemata.
16, device as claimed in claim 11 is characterized in that, described adjusted value determining unit comprises:
Storing sub-units between the proportional band is used to store the interval of the adjacent area ratio that adopts commonality schemata;
Adjusted value storing sub-units between the proportional band is used to store the pairing separately public channel transmissive power adjusted value of each described interval;
Second ratio value is determined subelement, is used for determining to adopt the adjacent area ratio of commonality schemata, and the adjacent area ratio of described employing commonality schemata accounts for the ratio value of all adjacent area total numbers for the adjacent area number that adopts commonality schemata;
The 4th adjusted value is determined subelement, is used for determining the public channel transmissive power adjusted value, and described adjusted value is the public channel transmissive power adjusted value corresponding to ratio place, the adjacent area interval of described employing commonality schemata.
17, a kind of radio network controller is characterized in that, comprises the described channel emission power inking device of arbitrary claim in the claim 11 to 16.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101541989A CN100574493C (en) | 2007-09-24 | 2007-09-24 | Channel emitting power configuring method and device thereof |
| PCT/CN2008/072495 WO2009039795A1 (en) | 2007-09-24 | 2008-09-24 | Channel transmission power collocating method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101541989A CN100574493C (en) | 2007-09-24 | 2007-09-24 | Channel emitting power configuring method and device thereof |
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| CN101119577A CN101119577A (en) | 2008-02-06 |
| CN100574493C true CN100574493C (en) | 2009-12-23 |
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| CNB2007101541989A Expired - Fee Related CN100574493C (en) | 2007-09-24 | 2007-09-24 | Channel emitting power configuring method and device thereof |
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| CN (1) | CN100574493C (en) |
| WO (1) | WO2009039795A1 (en) |
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| CN100574493C (en) * | 2007-09-24 | 2009-12-23 | 华为技术有限公司 | Channel emitting power configuring method and device thereof |
| US20130109429A1 (en) * | 2010-04-29 | 2013-05-02 | Agnieszka Szufarska | Interference Management |
| CN105657656B (en) * | 2016-01-06 | 2019-04-05 | Oppo广东移动通信有限公司 | A kind of transmission power adjustment method and user equipment |
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| US6970716B2 (en) * | 2001-02-22 | 2005-11-29 | Telefonaktiebolaget Lm Ericsson (Publ) | Power control for downlink shared channel in radio access telecommunications network |
| CN100471083C (en) * | 2005-05-16 | 2009-03-18 | 上海华为技术有限公司 | Method for carrying out power control on forward access channel |
| CN100574493C (en) * | 2007-09-24 | 2009-12-23 | 华为技术有限公司 | Channel emitting power configuring method and device thereof |
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| WO2009039795A1 (en) | 2009-04-02 |
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