CN101136673B - Power distribution method for reverse link power control channel - Google Patents
Power distribution method for reverse link power control channel Download PDFInfo
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- CN101136673B CN101136673B CN 200710090455 CN200710090455A CN101136673B CN 101136673 B CN101136673 B CN 101136673B CN 200710090455 CN200710090455 CN 200710090455 CN 200710090455 A CN200710090455 A CN 200710090455A CN 101136673 B CN101136673 B CN 101136673B
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Abstract
This invention discloses a power distribution method on reverse link power control channels including: a base station determines a total power volume used in reverse link power control channels and determines the power necessary to be distributed to the reverse link power control channels corresponding to mobile terminals according to the changes of the forward channel quality information reported by the mobile terminals and compares the total power with that needed for all the terminals to distribute the power on the reverse link power control channels.
Description
Technical field
The present invention relates to wireless communication field, more specifically, relate to the power distribution method on a kind of reverse link power control channel.
Background technology
In direct sequence CDMA (DS-CDMA) system, different mobile terminal is simultaneously with work frequently, and system is through distributing different code word to communicate (being commonly referred to Code Channel) for each portable terminal.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 all will make the performance of system be improved.Power control techniques has become a 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 just means that the power that on a Code Channel, sends is many more, and the available power of other Code Channel is just few more, even the situation that some Code Channel does not have available transmitting power can occur.Therefore, each Code Channel with certain suitable manner that transmitting power is correct and that reasonably be assigned in the identical CDMA Channel is very important.
Present existing power distribution method can be with reference to CN1343398A number Chinese patent that is entitled as " method of transmitting channel quality information and power division in wireless communication system " and the CN1315788A Chinese patent that is entitled as " 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 the portable terminal that is in different soft changing states to be classified to obtain power distribution method preferably; Thereby reduced the reverse performance of wireless communication system; Especially can influence HRPD (High Rate Packet Data; HRPD) (Quality of Service QoS) has the popularization of the business of strict demand to service quality in the system.
Therefore; Need the power distribution method on a kind of reverse link power control channel; Make the situation of change of base station according to wireless environment; Adjust the quantity of power of reverse link power control channel according to the residing soft changing state of portable terminal, thereby on the raising reverse links of wireless communication systems QoS is had the strict demand performance of services.
Yet proposing as yet at present can the correctly also reasonable scheme of carrying out the power division on the reverse link power control channel.
Summary of the invention
Consider the problems referred to above and make the present invention; For this reason; Main order of the present invention is to provide the power distribution method on a kind of reverse link power control channel; Make the base station according to the situation of change of wireless environment, adjust the quantity of power of reverse link power control channel, QoS is had the strict demand performance of services thereby improve on the reverse links of wireless communication systems according to the residing soft changing state of portable terminal.
For realizing above-mentioned purpose, the invention provides the power distribution method on a kind of reverse link power control channel.
This method comprises following processing: the total amount of power on the reverse link power control channel is confirmed to be used in the base station; The quantity of power that the pairing reverse link power control channel needs of each portable terminal distribute is confirmed according to the variation of the forward channel quality information of each mobile terminal reporting in the base station; And the quantity of power that total amount of power and all portable terminals need distribute compared; Surpass under the situation of total amount of power in the quantity of power that all portable terminals need distribute; According to whether being in soft changing state each portable terminal is divided into groups, and each portable terminal in each group is carried out power division according to the priority orders ground of each group.
And this method can also comprise processing: utilize the quantity of power of being distributed, to each portable terminal emission power of reverse link control signal.
Wherein, be no more than in the quantity of power that all portable terminals need distribute under the situation of total amount of power, the quantity of power that the base station is distributed is as required carried out power division to each portable terminal.
In addition, each portable terminal is distributed to the difference power of the quantity of power that total amount of power and all portable terminals need distribute in the base station, or distributes to the media into control channel of other non-return link power control channel.
Wherein, according to whether being in soft changing state, can each portable terminal be divided into soft changing state set of terminal and non-soft changing state set of terminal.And, can according to the order of first soft changing state set of terminal, the non-soft changing state set of terminal in back each portable terminal in each group is carried out power division.Wherein, In the soft changing state set of terminal; If the quantity of power that all portable terminals need distribute is greater than total amount of power; Then can be according to the absolute value of the signal to noise ratio of each mobile terminal backward pilot tone with the difference of the threshold value of exterior ring power control accordingly, descending order ground carries out power division to each portable terminal.
In the soft changing state set of terminal,, then can carry out power division to each portable terminal according to the quantity of power on the power of reverse link channel of each portable terminal if the quantity of power that all portable terminals need distribute is less than or equal to total amount of power.
And; If the quantity of power that all portable terminals in the soft changing state set of terminal need distribute is less than total amount of power; Then in non-soft changing state set of terminal; Can be according to the absolute value of the signal to noise ratio of each mobile terminal backward pilot tone with the difference of the threshold value of exterior ring power control accordingly, descending order ground carries out power division to each portable terminal in the non-soft changing state set of terminal.
Therefore; Through technique scheme of the present invention; Can so that the base station according to the situation of change of wireless environment; Adjust the quantity of power of reverse link power control channel according to the residing soft changing state of portable terminal, correct to realize, reasonably distribute, thereby improve on the reverse links of wireless communication systems QoS there is the strict demand performance of services.
Other features and advantages of the present invention will be set forth in specification subsequently, and, partly from specification, become obvious, perhaps understand through embodiment of the present invention.The object of the invention can be realized through the structure that in the specification of being write, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the power distribution method on the reverse link power control channel of the embodiment of the invention;
Fig. 2 is the flow chart that illustrates according to the detailed process step of the power distribution method on the reverse link power control channel of the embodiment of the invention; And
Fig. 3 is according to the flow chart of the power distribution method on the reverse link power control channel of the embodiment of the invention in practical application.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
Fig. 1 is the flow chart that shows according to the power distribution method on the reverse link power control channel of the embodiment of the invention.
As shown in Figure 1, may further comprise the steps according to the power distribution method on the reverse link power control channel of present embodiment: step S102, the total amount of power on the reverse link power control channel is confirmed to be used in the base station; Step S104, the quantity of power that the pairing reverse link power control channel needs of each portable terminal distribute is confirmed according to the variation of the forward channel quality information of each mobile terminal reporting in the base station; And step S106, the quantity of power that total amount of power and all portable terminals need be distributed compares, and according to comparative result, carries out the power division on the reverse link power control channel.
Wherein, power distribution method also comprises: utilize the quantity of power of being distributed, to each portable terminal emission power of reverse link control signal.
Wherein, The power division of carrying out on the reverse link power control channel according to comparative result comprises: be no more than in the quantity of power that all portable terminals need distribute under the situation of gross power; The quantity of power that the base station is distributed is as required carried out power division to each portable terminal.
Wherein, The power division of carrying out on the reverse link power control channel according to comparative result also comprises: each portable terminal is distributed to the difference power of the quantity of power that gross power and all portable terminals need distribute in the base station, or distributes to medium access control (MAC) channel of other non-return link power control channel.
Alternatively; The power division of carrying out on the reverse link power control channel according to comparative result comprises: surpass under the situation of gross power in the quantity of power that all portable terminals need distribute; According to whether being in soft changing state each portable terminal is divided into groups, and each portable terminal in each group is carried out power division according to the priority orders ground of each group.
Wherein, according to whether being in soft changing state, each portable terminal is divided into soft changing state set of terminal and non-soft changing state set of terminal.
Wherein, according to the order of first soft changing state set of terminal, the non-soft changing state set of terminal in back each portable terminal in each group is carried out power division.
In addition; In the soft changing state set of terminal; If the quantity of power that all portable terminals need distribute is greater than gross power; Then according to the absolute value of the signal to noise ratio of each mobile terminal backward pilot tone with the difference of the threshold value of exterior ring power control accordingly, descending order ground carries out power division to each portable terminal.
In addition, in the soft changing state set of terminal,, then, each portable terminal is carried out power division according to the quantity of power on the power of reverse link channel of each portable terminal if the quantity of power that all portable terminals need distribute is less than or equal to gross power.
In addition; If the quantity of power that all portable terminals in the soft changing state set of terminal need distribute is less than gross power; Then in non-soft changing state set of terminal; According to the absolute value of signal to noise ratio and the difference of corresponding exterior ring power control threshold value of each mobile terminal backward pilot tone, descending order ground carries out power division to each portable terminal in the non-soft changing state set of terminal.
Fig. 2 is the flow chart according to the power distribution method concrete steps on the reverse link power control channel of the embodiment of the invention.As shown in Figure 2, may further comprise the steps according to the concrete processing of the method for the embodiment of the invention:
Step S202, power of amount P total on the reverse link power control channel is confirmed can be used in the base station
t, forward step S204 to;
Step S204; The quantity of power that the corresponding reverse link power control channel needs of portable terminal distribute is confirmed 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 forward step S206 to; If the power summation of the reverse link power control channel that all portable terminals need distribute surpasses P
t, forward step S210 to;
Step S206, all portable terminal carries out power division according to the quantity of power on the reverse link power control channel of correspondence; Alternatively, step S208, the base station can be with dump power (P
t_ P
Sum) distribute to each portable terminal or distribute to the media into control channel of other non-return link power control channel to this dump power, forward step S212 to;
Step S210; The base station is according to the situation of change of the forward channel quality information of mobile terminal reporting; And whether be in soft changing state according to portable terminal portable terminal is divided into SHO (portable terminal is in soft changing state), two groups of NSHO (portable terminal is not in soft changing state); According to portable terminal priority order from high to low in portable terminal, the back NSHO group in the first SHO group each reverse link power control channel that sends to portable terminal is carried out power division, its summation is no more than P
t, forward step S212 to;
Step S212, the base station utilizes the quantity of power of distributing to launch reverse link power control channel to portable terminal.
Fig. 3 is according to the concrete realization flow figure that uses in the CDMA2000EV-DO system of the power distribution method on the reverse link power control channel of the embodiment of the invention.
CDMA2000EV-DO is a kind of wireless tranmission techniques that aims at mobile data applications and carried out optimization; With mainly be in order to optimize the 1x compared with techniques of voice and moderate rate transfer of data; The EV-DO technology has been done to optimize and improve to aspects such as capacity, message transmission rate and wireless interconnected accesses; Its fl transmission adopts time division multiplexing mode, and reverse transfer adopts the code division multiplexing mode.
In the CDMA2000EV-DO system actual moving process; Portable terminal confirms that according to the forward pilot quality that receives forward direction should be with which kind of speed grade to oneself transmission data; And through data rate control (Data Rate Control; DRC) channel reports the base station with this information real-time; The base station through dispatching algorithm decision whether at current time to the rate sending data of certain portable terminal according to its application, (Media AccessControl, MAC) reverse link power control channel in the channel is to portable terminal transmission power control information to utilize the medium access control simultaneously.
As shown in Figure 3, the power distribution method step on the reverse link power control channel is following:
Step S302, power of amount P total on the reverse link power control channel is confirmed can be used in the base station
t, forward step S304 to;
Step S304; 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, and 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 the value P
Sum＜=P
t, then all portable terminal obtains to carry out power division according to the quantity of power on the reverse link power control channel of correspondence; Alternatively, the base station can be with dump power (P
t_ P
Sum) distribute to each portable terminal or distribute to the MAC channel of other non-return link power control channel to this dump power, forward final step to, otherwise carry out step S306;
Step S306, whether the base station is in soft changing state according to portable terminal is divided into SHO (portable terminal is in soft changing state), two groups of NSHO (portable terminal is not in soft changing state) with portable terminal, forwards step S308 to;
Step S308, the power sum P of the required reverse link power control channel of all portable terminals in the SHO group is calculated in the base station
ShoIf P
Sho＞P
tThe 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 then in the SHO group, receives according to the base station is corresponding with each portable terminal sorts to the portable terminal in the SHO group from big to small; According to the order after the ordering is that portable terminal in the SHO group distributes power one by one, up to the power sum P of the n that has distributed portable terminal
Sho_part＞P
tTill, then power is distributed to quantity of power that preceding (n-1) individual portable terminal in the SHO group obtains according to tabling look-up before it in the base station, at this moment P
Sho_partThe power sum that (n-1) individual portable terminal distributes before becoming in the SHO group, n portable terminal obtains rest parts power (P
t-P
Sho_part), the performance number of the distribution of the reverse link power control channel that the whole portable terminals in other SHO that does not obtain to distribute group in part portable terminal and the NSHO group are corresponding is 0, changes final step over to; If P
Sho=P
t, then the whole portable terminals in the SHO group obtain to carry out power division according to the quantity of power on the reverse link power control channel of correspondence, and the performance number that the reverse link power control channel that the whole portable terminals in the NSHO group are corresponding distributes is 0, forwards final step to; If P
Sho＜P
t, then the whole portable terminals in the SHO group obtain to carry out power division according to the quantity of power on the reverse link power control channel of correspondence, forward step S310 to;
Step S310; 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 in the NSHO group, receives according to the base station is corresponding with each portable terminal sorts to the portable terminal in the NSHO group from big to small; According to the order after the ordering is that portable terminal in the NSHO group distributes power one by one, up to the power sum P of the m that has distributed portable terminal
Nsho_part＞(P
t-P
Sho) till; Then power is distributed to quantity of power that preceding (m-1) individual portable terminal in the NSHO group obtains according to tabling look-up before it in the base station, at this moment P
Nsho_partThe power sum that (m-1) individual portable terminal distributes before becoming in the NSHO group, m portable terminal obtains rest parts power (P
t-P
Sho-P
Nsho_part), the performance number of the distribution of the reverse link power control channel that the part portable terminal in other NSHO that does not obtain to distribute group is corresponding is 0, carries out step S312 then;
Step S312, the base station utilizes the quantity of power of distributing to launch reverse link power control channel to portable terminal.
In sum; By means of technical scheme of the present invention; Can so that the base station according to the situation of change of wireless environment; Adjust the quantity of power of reverse link power control channel according to the residing soft changing state of portable terminal, correct to realize, reasonably distribute, thereby improve on the reverse links of wireless communication systems QoS there is the strict demand performance of services.
More than be merely the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the power distribution method on the reverse link power control channel is characterized in that, comprising:
The total amount of power on the reverse link power control channel is confirmed to be used in the base station;
The quantity of power that the pairing reverse link power control channel needs of said each portable terminal distribute is confirmed according to the variation of the forward channel quality information of each mobile terminal reporting in said base station; And
The quantity of power that said total amount of power and all said portable terminals need be distributed compares; Surpass under the situation of said total amount of power in the quantity of power that all said portable terminals need distribute; According to whether being in soft changing state said each portable terminal is divided into groups, and said each portable terminal in said each group is carried out power division according to the priority orders ground of each group.
2. power distribution method according to claim 1 is characterized in that, also comprises: utilize the quantity of power of being distributed, to said each portable terminal emission power of reverse link control signal.
3. power distribution method according to claim 1 and 2; It is characterized in that; The quantity of power that need distribute at all said portable terminals is no more than under the situation of said total amount of power, and said base station is carried out power division according to the quantity of power that said needs distribute to said each portable terminal.
4. power distribution method according to claim 3; It is characterized in that; The quantity of power of distributing according to said needs in said base station; Said each portable terminal is carried out also comprising after the power division: said each portable terminal is distributed to the difference power of the quantity of power that said total amount of power and all said portable terminals need distribute in said base station, or distributes to the media into control channel of other non-return link power control channel.
5. power distribution method according to claim 1 is characterized in that, according to whether being in said soft changing state, said each portable terminal is divided into soft changing state set of terminal and non-soft changing state set of terminal.
6. power distribution method according to claim 5 is characterized in that, according to the order of the said soft changing state set of terminal of elder generation, the said non-soft changing state set of terminal in back said each portable terminal in said each group is carried out power division.
7. according to claim 1 or 5 described power distribution methods; It is characterized in that; In the soft changing state set of terminal; If the quantity of power that all said portable terminals need distribute is greater than said total amount of power, then according to the absolute value of the signal to noise ratio of said each mobile terminal backward pilot tone with the difference of the threshold value of exterior ring power control accordingly, descending order ground carries out power division to said each portable terminal.
8. according to claim 1 or 5 described power distribution methods; It is characterized in that; In the soft changing state set of terminal; If the quantity of power that all said portable terminals need distribute is less than or equal to said total amount of power,, said each said portable terminal is carried out power division then according to the quantity of power on the power of reverse link channel of said each said portable terminal.
9. power distribution method according to claim 8; It is characterized in that; If the quantity of power that all the said portable terminals in said soft changing state set of terminal need distribute is less than said total amount of power; Then in said non-soft changing state set of terminal, according to the absolute value of the signal to noise ratio of each mobile terminal backward pilot tone with the difference of the threshold value of exterior ring power control accordingly, descending order ground carries out power division to said each portable terminal in the said non-soft changing state set of terminal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710090455 CN101136673B (en) | 2007-04-06 | 2007-04-06 | Power distribution method for reverse link power control channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710090455 CN101136673B (en) | 2007-04-06 | 2007-04-06 | Power distribution method for reverse link power control channel |
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| CN101136673A CN101136673A (en) | 2008-03-05 |
| CN101136673B true CN101136673B (en) | 2012-12-19 |
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|---|---|---|---|
| CN 200710090455 Expired - Fee Related CN101136673B (en) | 2007-04-06 | 2007-04-06 | Power distribution method for reverse link power control channel |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103209410A (en) * | 2012-01-11 | 2013-07-17 | 中兴通讯股份有限公司 | Methods and system for achieving QoS (quality of service) reflection mechanism |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1185706A (en) * | 1996-12-05 | 1998-06-24 | 日本电气株式会社 | Emission power control device for moveable communication system |
| US6167237A (en) * | 1997-02-28 | 2000-12-26 | U.S. Philips Corporation | Universal wireless communication system, a transmission protocol, a wireless communication station, and a radio base station |
| 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 |
-
2007
- 2007-04-06 CN CN 200710090455 patent/CN101136673B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1185706A (en) * | 1996-12-05 | 1998-06-24 | 日本电气株式会社 | Emission power control device for moveable communication system |
| US6167237A (en) * | 1997-02-28 | 2000-12-26 | U.S. Philips Corporation | Universal wireless communication system, a transmission protocol, a wireless communication station, and a radio base station |
| 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 |
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| CN101136673A (en) | 2008-03-05 |
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