CN101136672B - Power distribution method and apparatus for reverse link power control channel - Google Patents
Power distribution method and apparatus for reverse link power control channel Download PDFInfo
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- CN101136672B CN101136672B CN2007100795189A CN200710079518A CN101136672B CN 101136672 B CN101136672 B CN 101136672B CN 2007100795189 A CN2007100795189 A CN 2007100795189A CN 200710079518 A CN200710079518 A CN 200710079518A CN 101136672 B CN101136672 B CN 101136672B
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- power
- portable terminal
- control channel
- reverse link
- power control
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Abstract
This invention discloses a power distribution method and a device used in power control channels of reverse links, in which, the method includes: 1, a base station determines a total power volume used on reverse link power control channels, 2, the station determines the power volume to be distributed of the reverse link power control channels corresponding to mobile terminals, 3, the station emits link power control channels to the mobile terminals based on the power distributed to the mobile terminals.
Description
Technical field
The present invention relates to the communications field, relate in particular to the power distribution method and the device that are used for reverse link power control channel.
Background technology
In DS-CDMA (direct sequence CDMA) system, different mobile terminal is simultaneously with work frequently, system is by distributing different code words to communicate (being commonly referred to Code Channel) for each portable terminal, and this makes the capacity of system and performance depend on the interference that portable terminal is suffered to a great extent.In cdma system, any method that reduces the suffered interference of portable terminal will make that all the performance of system is improved.Power control techniques has become a kind of key technology of cdma communication system as reducing a kind of effective means of disturbing between system channel.
Usually, the base station is responsible for sending complete CDMA Channel (set of all portable terminal Code Channel) to all portable terminals by single amplifier, and the gross output amount that this amplifier can provide generally has a limit, this means that the power that sends is many more on a Code Channel, the available power of other Code Channel is just few more, even some Code Channel can occur and do not have available transmitting power, therefore, be each Code Channel that transmitting power is assigned in the identical CDMA Channel with holding water very important according to certain suitable manner.
But present existing power distribution method referenced patent CN1343398A " method of transmitting channel quality information and power division in wireless communication system ", CN1315788A " CDMA communication system forward power saturation protecting method and output control device "; but these methods fail well the The function of backward power control channel that sends to portable terminal to be classified to obtain power distribution method preferably, thereby have reduced the reverse performance of wireless communication system.
Summary of the invention
At the problems referred to above, the objective of the invention is to propose a kind of power distribution method and device that is used for reverse link power control channel, the present invention can effectively improve the reverse wireless resource utility efficiency of wireless communication system.
The power distribution method that is used for reverse link power control channel of the present invention comprises the steps:
S102, power of amount P total on the reverse link power control channel is determined can be used in the base station
t
S104, the quantity of power that the reverse link power control channel needs of portable terminal correspondence distribute is determined according to the situation of change of the forward channel quality information of mobile terminal reporting in the base station, if the power summation P of the reverse link power control channel that all portable terminals need distribute
SumBe no more than P
t, then all portable terminal can carry out power division according to the quantity of power on the reverse link power control channel of correspondence, and alternatively, the base station can be with dump power (P
t-P
Sum) distribute to each portable terminal or this dump power is distributed to MAC (the Media Access Control) channel of other non-return link power control channel, change S106 over to.
If the power summation of the reverse link power control channel that all portable terminals need distribute surpasses P
tThen the requirement according to the power lifting is divided into two groups with portable terminal, wherein need the portable terminal of bring to power to be called lifting group (Up group), the portable terminal that needs to reduce power is called reduction group (Down group), and the order according to portable terminal in the Up group behind the portable terminal in the first Down group is carried out power division to each reverse link power control channel that sends to portable terminal, and the power summation of distribution can not surpass P
t, change S106 afterwards over to;
S106, the base station utilizes the quantity of power of distributing to launch reverse link power control channel to portable terminal.
The power distribution unit that is used for reverse link power control channel of the present invention, this device comprises: the gross power determination module is used to determine can be used on the total amount of power Pt on the reverse link power control channel; The quantity of power distribution module is used under the situation of change according to the forward channel quality information of mobile terminal reporting, determines the quantity of power that the reverse link power control channel of portable terminal correspondence need distribute; And the power control channel distribution module, be used for according to the quantity of power of distributing to portable terminal, to portable terminal emission reverse link power control channel.
Wherein, under the situation of power summation Psum smaller or equal to total amount of power Pt of the reverse link power control channel that portable terminal need distribute, the power division module is carried out power division according to the quantity of power on the reverse link power control channel of portable terminal correspondence.
Wherein, the power division module comprises: grouping module, be used under the situation of power summation Psum greater than total amount of power Pt of the direction link power control channel that portable terminal need distribute, requirement according to the power lifting is divided into two groups with portable terminal, wherein, the group that needs the portable terminal place of bring to power is the power ascension group, and needing the group at the portable terminal place of reduction power is power reduction group; Distribution module, be used for the portable terminal of power reduction group or power ascension group is sorted, and distribute power in order the reverse link power control channel of the portable terminal in the described power reduction group, the reverse link power control channel to the portable terminal in the power ascension group distributes power then.
Wherein, under the situation of power more than or equal to described gross power Pt of distributing, giving the power of the reverse link power control channel distribution of subsequent movement terminal is 0.
Wherein, the power division module sorts the portable terminal in power reduction group or the power ascension group according to the order from big to small of the absolute value of the difference of the signal to noise ratio of the reverse pilot of the portable terminal that the receives exterior ring power control threshold value thresholding corresponding with portable terminal.
In the present invention, the quantity of power of reverse link power control channel is adjusted according to the situation of change of wireless environment in the base station, thereby can improve the reverse wireless resource utility efficiency of wireless communication system.
Description of drawings
Shuo Ming accompanying drawing is used to provide further understanding of the present invention herein, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute to improper qualification of the present invention, in the accompanying drawings:
Fig. 1 is the flow chart that is used for the power distribution method of reverse link power control channel of the present invention;
Fig. 2 is the specific implementation flow chart of the power distribution method that is used for reverse link power control channel of the embodiment of the invention; And
Fig. 3 is the structure chart that is used for the power distribution unit of reverse link power control channel of the present invention.
Embodiment
The present invention will be further described in detail below in conjunction with drawings and Examples.
Fig. 1 is the flow chart that is used for the power distribution method of reverse link power control channel of the present invention.As shown in Figure 1, this method may further comprise the steps:
S102, power of amount P total on the reverse link power control channel is determined can be used in the base station
t
S104, the quantity of power (S104-2) that the reverse link power control channel needs of portable terminal correspondence distribute is determined according to the situation of change of the forward channel quality information of mobile terminal reporting in the base station, if the power summation P of the reverse link power control channel that all portable terminals need distribute
SumBe no more than P
t, then all portable terminal can carry out power division (S104-4) according to the quantity of power on the reverse link power control channel of correspondence, and alternatively, the base station can be with dump power (P
t-P
Sum) distribute to each portable terminal or this dump power is distributed to the MAC channel (S104-6) of other non-return link power control channel, change S106 over to.
If the power summation of the reverse link power control channel that all portable terminals need distribute surpasses P
tThen the requirement according to the power lifting is divided into two groups with portable terminal, wherein need the portable terminal of bring to power to be called the Up group, the portable terminal that needs to reduce power is called Down group (S104-8), and the order according to portable terminal in the Up group behind the portable terminal in the first Down group is carried out power division to each reverse link power control channel that sends to portable terminal, and the power summation of distribution can not surpass P
t(S104-10, S104-12) changes S106 over to.
S106, the base station utilizes the quantity of power of distributing to launch reverse link power control channel to portable terminal.
CDMA2000 EV-DO is a kind of wireless tranmission techniques that aims at mobile data applications and carried out optimization, with mainly be that 1x technology in order to optimize voice and moderate rate transfer of data is compared, the EV-DO technology has been done to optimize and improve at aspects such as capacity, message transmission rate and wireless interconnected accesses, fl transmission adopts time division multiplexing mode, and reverse transfer adopts the code division multiplexing mode.
Be that example is described in detail with CDMA2000 EV-DO system actual moving process below.
In the CDMA2000 EV-DO system actual moving process, portable terminal determines that according to the quality of the forward pilot that receives forward direction should be with which kind of speed grade to oneself transmission data, and give the base station with this information real-time report by DRC (Data Rate Control) channel, the base station by dispatching algorithm decision whether at current time to the rate sending data of certain portable terminal according to its application, utilize reverse link power control channel in the MAC channel to portable terminal transmission power control information simultaneously.
Fig. 2 has described concrete use of method in CDMA2000 EV-DO system that the present invention proposes, and step is as follows:
S202, power of amount P total on the reverse link power control channel is determined can be used in the base station
t, change S204 over to.
S204, the base station comprises the corresponding quantity of power of DRC information of searching current each mobile terminal reporting in the table of DRC information and quantity of power according to the DRC information of each mobile terminal reporting at one, the quantity of power that obtains tabling look-up is as the quantity of power of the reverse link power control channel of distributing to each portable terminal, if these quantity of power with value P
Sum＜=P
t, then all portable terminal obtains to carry out power division (S204-1) according to the quantity of power on the reverse link power control channel of correspondence, and alternatively, the base station can be with dump power (P
t-P
Sum) distribute to each portable terminal or this dump power is distributed to the MAC channel (S204-2) of other non-return link power control channel, change S214 over to, otherwise change S206 over to.
S206, the base station is divided into two groups according to the requirement of power lifting with portable terminal, wherein needs the portable terminal of bring to power to be called the Up group, and the portable terminal that needs to reduce power is called the Down group, changes S208 over to.
S208, the power sum P of the required reverse link power control channel of all portable terminals in the Down group is calculated in the base station
DownIf, P
Down＞P
tPortable terminal during then the absolute value of the difference of the signal to noise ratio of each the mobile terminal backward pilot tone that receives according to the base station in the Down group exterior ring power control threshold value thresholding corresponding with each portable terminal is organized Down from big to small sorts, according to the order after the ordering is that portable terminal in the Down group distributes power one by one, up to the power sum P of the n that has distributed portable terminal
Down_part＞P
tTill, then power is distributed to quantity of power that preceding (n-1) individual portable terminal in the Down group obtains according to tabling look-up before it in the base station, at this moment P
Down_partThe power sum that (n-1) individual portable terminal distributes before becoming in the Down group, n portable terminal obtains rest parts power (P
t-P
Down_part), the performance number of the distribution of the reverse link power control channel of the whole portable terminal correspondences in other Down that does not obtain to distribute group in part portable terminal and the Up group is 0 (S208-1), changes S214 over to.
At P
Down＞P
tUnder the invalid situation, whole portable terminals obtain to carry out power division (S210) according to the quantity of power on the corresponding reverse link power control channel in the Down group, if P
Down=P
tThen the whole portable terminals in the Down group obtain to carry out power division according to the quantity of power on the reverse link power control channel of correspondence, the performance number of the distribution of the reverse link power control channel of the whole portable terminal correspondences in the Up group is 0, changes S214 over to, if P
Down＜P
t, then the whole portable terminals in the Down group obtain to carry out power division according to the amount on the reverse link power control channel of correspondence, change S212 over to.
S212, the absolute value of the difference of the exterior ring power control threshold value thresholding that the signal to noise ratio of each the mobile terminal backward pilot tone that receives according to the base station in the Up group is corresponding with each portable terminal sorts to the portable terminal in the Up group from big to small, according to the order after the ordering is that portable terminal in the Up group distributes power one by one, up to the power sum P of the m that has distributed portable terminal
Up_part＞(P
t-P
Down) till, then power is distributed to quantity of power that preceding (m-1) individual portable terminal in the Up group obtains according to tabling look-up before it in the base station, at this moment P
Up_partThe power sum that (m-1) individual portable terminal distributes before becoming in the Up group, m portable terminal obtains rest parts power (P
t-P
Down-P
Up_part), the performance number of the distribution of the reverse link power control channel of the part portable terminal correspondence in other Up that does not obtain to distribute group is 0, changes S214 over to.
S214, the base station utilizes the quantity of power of distributing to launch reverse link power control channel to portable terminal.
Below by several concrete examples said process is described: suppose to have seven portable terminal A, B, C, D, E, F, G sends DRC information for a certain base station, the DRC value is respectively 1,2,3,4,5,6, X (expression base station successfully do not decode DRC channel data), after interior ring and exterior ring power algorithm are passed through in the base station, the absolute value that obtains the difference of the signal to noise ratio of each the mobile terminal backward pilot tone exterior ring power control threshold value thresholding corresponding with each portable terminal is 2,6,5,7,9,1,4, determine A simultaneously, B, C, G needs power per liter, then constitute the Up group, D, E, power need fall in F, D then, E, F constitutes the Down group, if it is 10w that base station assigns is given the gross power of reverse link power control channel, can drawing at this moment, the base station can't be the power that all portable terminals distribute reverse link power control channels needs, then distribute for the portable terminal in the Down group earlier, this moment, reverse link power control channel also can't be distributed for all portable terminals in the Down group in the base station as can be seen, the absolute value method of portable terminal in the Down group according to the difference of the signal to noise ratio of each mobile terminal backward pilot tone in the Down group exterior ring power control threshold value thresholding corresponding with each portable terminal sorted, the result who obtains is E, D, F, then can get portable terminal E according to the corresponding relation in the table one, D, the power that distributes on the reverse link power control channel of F correspondence is 4,6,0, A, B, C, the power that distributes on the reverse link power control channel of G correspondence all is 0.
Corresponding relation (the quantity of power unit: w) of table one, DRC value and quantity of power
| The DRC value | 1 | 2 | 3 | 4 | 5 | 6 | X |
| Quantity of power | 12 | 10 | 8 | 6 | 4 | 2 | 2 |
Fig. 3 is the structure chart that is used for the power distribution unit of reverse link power control channel of the present invention, and as shown in Figure 3, this device comprises: gross power determination module 302 is used to determine can be used on the total amount of power Pt on the reverse link power control channel; Quantity of power distribution module 304 is used under the situation of change according to the forward channel quality information of mobile terminal reporting, determines the quantity of power that the reverse link power control channel of portable terminal correspondence need distribute; And power control channel distribution module 306, be used for according to the quantity of power of distributing to portable terminal, to portable terminal emission reverse link power control channel.
Wherein, under the situation of power summation Psum smaller or equal to total amount of power Pt of the reverse link power control channel that portable terminal need distribute, the power division module is carried out power division according to the quantity of power on the reverse link power control channel of portable terminal correspondence.
Wherein, power division module 304 comprises: grouping module 3042, be used under the situation of power summation Psum greater than total amount of power Pt of the direction link power control channel that portable terminal need distribute, requirement according to the power lifting is divided into two groups with portable terminal, wherein, the group that needs the portable terminal place of bring to power is the power ascension group, and needing the group at the portable terminal place of reduction power is power reduction group; Distribution module 3044, be used for the portable terminal of power reduction group or power ascension group is sorted, and distribute power in order the reverse link power control channel of the portable terminal in the described power reduction group, the reverse link power control channel to the portable terminal in the power ascension group distributes power then.
Wherein, under the situation of power more than or equal to described gross power Pt of distributing, giving the power of the reverse link power control channel distribution of subsequent movement terminal is 0.
Wherein, power division module 304 sorts the portable terminal in power reduction group or the power ascension group according to the order from big to small of the absolute value of the difference of the signal to noise ratio of the reverse pilot of the portable terminal that the receives exterior ring power control threshold value thresholding corresponding with portable terminal.
Those skilled in the art will readily understand additional advantages and modifications of the present invention.Therefore, above-mentioned at embodiment be described as the concrete Application Example of the present invention, the present invention aspect widely is not limited to the specific detail and the exemplary embodiments that illustrate and describe herein.Therefore, can under the condition that does not break away from by claim and the spirit or scope of the present invention that equivalent limited thereof, make various modifications.
Claims (8)
1. a power distribution method that is used for reverse link power control channel is characterized in that, may further comprise the steps:
S102, the total amount of power Pt on the described reverse link power control channel is determined can be used in the base station;
S104, described base station is according to the situation of change of the forward channel quality information of mobile terminal reporting, determines the quantity of power that the reverse link power control channel of portable terminal correspondence need distribute; And
S106, described base station is according to the quantity of power of distributing to described portable terminal, to described portable terminal emission reverse link power control channel;
Wherein, in described S104, under the situation of power summation Psum greater than described total amount of power Pt of the reverse link power control channel that described portable terminal need distribute, described S104 comprises:
S104-8, described base station is divided into two groups according to the requirement of power lifting with described portable terminal, and wherein, the group that needs the portable terminal place of bring to power is the power ascension group, and needing the group at the portable terminal place of reduction power is power reduction group;
S104-10, sorting to the portable terminal in the described power reduction group in described base station, and distributes power in order the reverse link power control channel of the portable terminal in the described power reduction group;
S104-12, sorting to the portable terminal in the described power ascension group in described base station, and distributes power in order the reverse link power control channel of the portable terminal in the described power ascension group.
2. power distribution method according to claim 1, it is characterized in that, in described S104, under the situation of power summation Psum smaller or equal to described total amount of power Pt of the reverse link power control channel that described portable terminal need distribute, power division is carried out according to the quantity of power of the reverse link power control channel needs distribution of described portable terminal correspondence in described base station.
3. power distribution method according to claim 1 is characterized in that, under the situation of power more than or equal to described total amount of power Pt of distributing, giving the power of the reverse link power control channel distribution of subsequent movement terminal is 0.
4. according to claim 1 or 3 described power distribution methods, it is characterized in that, sort the portable terminal in described power reduction group or the described power ascension group according to the order from big to small of the absolute value of the difference of the signal to noise ratio of the reverse pilot of the described portable terminal that the receives exterior ring power control threshold value thresholding corresponding with described portable terminal in described base station.
5. power distribution unit that is used for reverse link power control channel is characterized in that comprising:
The gross power determination module is used to determine can be used on the total amount of power Pt on the described reverse link power control channel;
The quantity of power distribution module is used under the situation of change according to the forward channel quality information of mobile terminal reporting, determines the quantity of power that the reverse link power control channel of portable terminal correspondence need distribute; And
The power control channel distribution module is used for according to the quantity of power of distributing to described portable terminal, to described portable terminal emission reverse link power control channel;
Wherein, described power division module comprises:
Grouping module, be used under the situation of power summation Psum greater than described total amount of power Pt of the reverse link power control channel that described portable terminal need distribute, requirement according to the power lifting is divided into two groups with described portable terminal, wherein, the group that needs the portable terminal place of bring to power is the power ascension group, and needing the group at the portable terminal place of reduction power is power reduction group;
Distribution module, be used for the portable terminal of described power reduction group or power ascension group is sorted, and distribute power in order the reverse link power control channel of the portable terminal in the described power reduction group, distribute power for then the reverse link power control channel of the portable terminal in the described power ascension group.
6. power distribution unit according to claim 5, it is characterized in that, under the situation of power summation Psum smaller or equal to described total amount of power Pt of the reverse link power control channel that described portable terminal need distribute, described power division module is carried out power division according to the quantity of power on the reverse link power control channel of described portable terminal correspondence.
7. power distribution unit according to claim 5 is characterized in that, under the situation of power more than or equal to described gross power Pt of distributing, giving the power of the reverse link power control channel distribution of subsequent movement terminal is 0.
8. according to claim 5 or 7 described power distribution units, it is characterized in that, described power division module sorts the portable terminal in described power reduction group or the described power ascension group according to the order from big to small of the absolute value of the difference of the signal to noise ratio of the reverse pilot of the described portable terminal that the receives exterior ring power control threshold value thresholding corresponding with described portable terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100795189A CN101136672B (en) | 2007-02-16 | 2007-02-16 | Power distribution method and apparatus for reverse link power control channel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100795189A CN101136672B (en) | 2007-02-16 | 2007-02-16 | Power distribution method and apparatus for reverse link power control channel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101136672A CN101136672A (en) | 2008-03-05 |
| CN101136672B true CN101136672B (en) | 2011-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100795189A Expired - Fee Related CN101136672B (en) | 2007-02-16 | 2007-02-16 | Power distribution method and apparatus for reverse link power control channel |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1315788A (en) * | 2000-03-23 | 2001-10-03 | 华为技术有限公司 | Forward power saturation protecting method and power controller for CDMA communication system |
| CN1343398A (en) * | 1999-03-12 | 2002-04-03 | 高通股份有限公司 | Method and apparatus for power allocation on reverse link power control channel of communication system |
| CN1889378A (en) * | 2005-06-29 | 2007-01-03 | 华为技术有限公司 | Channel power distributing method in 3G mobile communication system |
-
2007
- 2007-02-16 CN CN2007100795189A patent/CN101136672B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1343398A (en) * | 1999-03-12 | 2002-04-03 | 高通股份有限公司 | Method and apparatus for power allocation on reverse link power control channel of communication system |
| CN1315788A (en) * | 2000-03-23 | 2001-10-03 | 华为技术有限公司 | Forward power saturation protecting method and power controller for CDMA communication system |
| CN1889378A (en) * | 2005-06-29 | 2007-01-03 | 华为技术有限公司 | Channel power distributing method in 3G mobile communication system |
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|---|---|
| CN101136672A (en) | 2008-03-05 |
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