CN101282146B - Method for controlling overload of downlink emitter power - Google Patents
Method for controlling overload of downlink emitter power Download PDFInfo
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- CN101282146B CN101282146B CN2007100875569A CN200710087556A CN101282146B CN 101282146 B CN101282146 B CN 101282146B CN 2007100875569 A CN2007100875569 A CN 2007100875569A CN 200710087556 A CN200710087556 A CN 200710087556A CN 101282146 B CN101282146 B CN 101282146B
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- China
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- transmitting power
- power
- link
- user
- cellular downlink
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a method for controlling the overload of the transmission power of the descending chain. When the overload of the transmission power of the descending chain in the cell is determined, the method comprises the following procedures: a. reducing the descending chain transmission power of the subscriber which needs maximum descending chain transmission power in the cell, wherein the reduced descending chain transmission power of the subscriber is larger than or equal to an average power; and b. returning to step a when the transmission power of the descending chain in the cell is still overloaded. The method according to the invention can effectively reduce the halt probability of the mobile communication network based on the pure sound service. The invention is mainly applied for the pure sound service application scene in the code division multiple access mobile communication system.
Description
Technical field
The present invention relates to power control techniques in the GSM, relate in particular to method for controlling overload of downlink emitter power in the pure speech service application scene of code division multiple access (CDMA, Code Division Multiple Access) GSM.
Background technology
CDMA mobile communication system is for disturb system certainly, and therefore, power control techniques is the core technology of cdma system.Said power control is divided into up-link transmission power control and down-link transmitting power control, and wherein, down-link transmitting power control can be divided into control of down link list user emission power and overload of downlink emitter power control again.Usually; The control of down link list user emission power can make each user obtain to reach down link target signal to noise ratio (SIR; Signaling Intertrace Rate) required down-link transmitting power, and through scale factor is set to make the sub-district be the certain proportion that maximum downlink transmitting power that the user distributes is no more than the specified transmitting power of cellular downlink; And overload of downlink emitter power control can be eliminated the overload part of the sub-district that is in the overload of downlink emitter power state through control method; Here, described cellular downlink transmission power overload is meant: the down-link transmitting power sum that all users need in this sub-district surpasses the specified transmitting power of cellular downlink.
In the prior art, the down-link transmitting power control procedure is such:
Required down-link transmitting power when calculating according to the current SIR of each user that each user reaches target SIR in the sub-district, and utilize the scale factor that is provided with that required down-link transmitting power is limited in the certain proportion scope of the specified transmitting power of this cellular downlink.For arbitrary cells; If the down-link transmitting power sum that all users need in this sub-district surpasses the specified transmitting power of cellular downlink; Then get into cellular downlink transmission power overload control flow; That is: in guaranteeing mobile communications network, in the minimal disruption probability, control the cellular downlink transmitting power in specified transmitting power scope.
At present, in the pure speech service application scene of common CDMA mobile communication system, method for controlling overload of downlink emitter power is: the down-link transmitting power that will be in all users in the overload of downlink emitter power state sub-district all reduces identical decibel (dB); Eliminate the overload part of this cellular downlink transmitting power; But this kind method is to reduce all users' in this sub-district down-link transmitting power, and can not distinguish the size order of the required down-link transmitting power of user; That is to say; If certain or certain several user's down-link transmitting powers are average power in the sub-district, so, the down-link transmitting power that reduces all users in this sub-district will cause the speech business of this or this several users to interrupt; Therefore, still there is the high problem and shortage of outage probability in this method.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method for controlling overload of downlink emitter power, can reduce the outage probability based on the mobile communications network of pure speech business effectively.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of method for controlling overload of downlink emitter power, when judging the cellular downlink transmission power overload, this method comprises the steps:
A. reduce the current down-link transmitting power that needs the maximum user of down-link transmitting power in this sub-district through the control of down link list user emission power, this user's down-link transmitting power is more than or equal to average power after the reduction; Currently in the said sub-district need the maximum user of down-link transmitting power to be: all users in the current area to be sorted according to the size of required down-link transmitting power successively, obtain currently in the sub-district needing the maximum user of down-link transmitting power;
B. judge and return step a when the cellular downlink transmitting power is still transshipped;
Said average power is: guarantee that the user reaches the lowest power of speech quality standard, the code channel number that is taken by speech business and the product of solid size road power calculate.
Wherein, Judge described in the step b that the cellular downlink transmitting power still transships and can adopt: judge that cellular downlink transships the down-link transmitting power whether the part transmitting power be lowered greater than said user; If greater than; Then the cellular downlink transmitting power is still transshipped, otherwise, cellular downlink transmitting power nonoverload.
The cellular downlink of judgement described in step b transmitting power is still transshipped and also can be adopted: whether the down-link transmitting power sum of judging the current needs of all users in the sub-district is greater than the specified transmitting power of cellular downlink; If greater than; Then the cellular downlink transmitting power is still transshipped; Otherwise, cellular downlink transmitting power nonoverload.
Can find out by such scheme; Key of the present invention is: only reduce the down-link transmitting power that needs the bigger that part of user of down-link transmitting power in this sub-district; And this user's down-link transmitting power is not less than average power after reducing; User after guaranteeing to reduce still can carry out normal speech business, and therefore, the present invention possesses the advantage that can effectively reduce based on the mobile communications network outage probability of pure speech business.
Description of drawings
Fig. 1 is the realization flow figure of method for controlling overload of downlink emitter power of the present invention;
Fig. 2 is the contrast sketch map that outage probability changes with covering radius under prior art and method for controlling overload of downlink emitter power of the present invention.
Embodiment
Be described in detail below in conjunction with the realization of accompanying drawing the inventive method.
Referring to Fig. 1; Fig. 1 is the realization flow figure of method for controlling overload of downlink emitter power; This control method comprises judges whether the cellular downlink transmitting power transships flow process and overload of downlink emitter power control flow; Wherein, judge whether the cellular downlink transmitting power transships flow process shown in step 201～203, this flow process is existing method; Overload of downlink emitter power control flow such as step 204～206, this flow process are the inventive method.
Before carrying out overload of downlink emitter power control, to judge at first whether the current area down-link transmitting power transships, and deterministic process specifically may further comprise the steps:
Step 201: according to the current SIR of each user in the current area; Calculate down-link transmitting power required when each user reaches target SIR in the sub-district, utilize the scale factor that is provided with the down-link transmitting power that calculates to be limited in the certain proportion scope of the specified transmitting power of this cellular downlink;
Step 202: calculate the down-link transmitting power sum that all users need in the current area;
Step 203: whether the down transmitting power sum of judging all users' needs in the current area is greater than the specified transmitting power of current area down link; If greater than; Show the current area overload of downlink emitter power, then get into cellular downlink transmission power overload control flow of the present invention, otherwise; Show current area down-link transmitting power nonoverload, finish current downlink power overload control flow.
Cellular downlink transmission power overload control method of the present invention may further comprise the steps:
Here, said average power is: guarantee that the user reaches the lowest power of speech quality standard, the code channel number that is taken by speech business and the product of solid size road power calculate.
Wherein, the current maximum user's of down-link transmitting power the down-link transmitting power that needs is realized through the control of down link list user emission power in the reduction sequence.
Step 206: judge the down-link transmitting power whether current area down link overload part transmitting power is lowered greater than this user; If greater than; Show that the current area down-link transmitting power still transships, return step 205, otherwise; Show current area down-link transmitting power nonoverload, finish current downlink power overload control flow.
Here, said overload part transmitting power is: get into cellular downlink transmission power overload control flow of the present invention current area down link overload part transmitting power before.
If the down-link transmitting power that current area down link overload part transmitting power is lowered greater than this user; Likewise; If the down-link transmitting power sum of the current needs of all users is greater than the specified transmitting power of current area down link in the current area; Then reduce the current down-link transmitting power that needs the maximum user of down-link transmitting power in the sequence; That is: reduce in this sequence the user's maximum inferior large user's down-link transmitting power, and the transmitting power after this user's reduction is not less than average power with respect to former down-link transmitting power, and the like; When current area down link overload part transmitting power equals down-link transmitting power that the user is lowered, finish current overload control flow.
Such as, all users according to the sequence that required down-link transmitting power sorts from big to small successively are in the current area: user A, user B, user C etc.When judging the cellular downlink transmission power overload, at first reduce in the sequence the current down-link transmitting power that needs the maximum user A of down-link transmitting power to average power; After this; Judge when the cellular downlink transmitting power is still transshipped; Reduce the current down-link transmitting power that needs the maximum user B of down-link transmitting power in the sequence, and the transmitting power of user B after reducing be not less than average power, and the like; When current area down link overload part transmitting power equals down-link transmitting power that the user is lowered, finish current overload control flow.
Referring to Fig. 2; Fig. 2 is the correlation curve that under prior art and method for controlling overload of downlink emitter power of the present invention, changes with covering radius based on the outage probability of the mobile communications network of pure speech business; Wherein, Outage probability under the existing method control of dashed curve representative, block curve is represented the outage probability under the inventive method control.
Simultaneously referring to table one, when table one was 600 meters, 700 meters, 800 meters and 900 meters for network coverage radius, existing method and the inventive method controlled the outage probability of the mobile communications network of pure speech business.
Table one
Can find out by Fig. 2 and table one; Under the equal covering radius that two kinds of method for controlling overload of downlink emitter power are implemented; It is more much lower than the outage probability under the existing method control to adopt the inventive method can make based on the mobile communications network outage probability of pure speech business; And along with the increase of covering radius, the difference of both outage probabilities also increases thereupon, and it is more obvious to make the present invention can effectively reduce the effect of mobile communications network outage probability of pure speech business.
Above-mentioned embodiment describes the present invention with preferred embodiment, but the instance of this visualization of just lifting for the ease of understanding should not be considered to be limitation of the scope of the invention.Equally, according to the description of technical scheme of the present invention and preferred embodiment thereof, can make various possible being equal to and change or replacement, and all these changes or replacement all should belong to the protection range of claim of the present invention.
Claims (3)
1. a method for controlling overload of downlink emitter power is characterized in that, when judging the cellular downlink transmission power overload, this method comprises the steps:
A. reduce the current down-link transmitting power that needs the maximum user of down-link transmitting power in this sub-district through the control of down link list user emission power, this user's down-link transmitting power is more than or equal to average power after the reduction; Currently in the said sub-district need the maximum user of down-link transmitting power to be: all users in the current area to be sorted according to the size of required down-link transmitting power successively, obtain currently in the sub-district needing the maximum user of down-link transmitting power;
B. judge and return step a when the cellular downlink transmitting power is still transshipped;
Said average power is: guarantee that the user reaches the lowest power of speech quality standard, the code channel number that is taken by speech business and the product of solid size road power calculate.
2. method according to claim 1; It is characterized in that; Judging described in the step b that the cellular downlink transmitting power is still transshipped is specially: judge that cellular downlink transships the down-link transmitting power whether the part transmitting power be lowered greater than said user, if greater than, then the cellular downlink transmitting power is still transshipped; Otherwise, cellular downlink transmitting power nonoverload.
3. method according to claim 1; It is characterized in that; Judging described in the step b that the cellular downlink transmitting power is still transshipped is specially: whether the down-link transmitting power sum of judging the current needs of all users in the sub-district greater than the specified transmitting power of cellular downlink, if greater than, then the cellular downlink transmitting power is still transshipped; Otherwise, cellular downlink transmitting power nonoverload.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100875569A CN101282146B (en) | 2007-04-02 | 2007-04-02 | Method for controlling overload of downlink emitter power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100875569A CN101282146B (en) | 2007-04-02 | 2007-04-02 | Method for controlling overload of downlink emitter power |
Publications (2)
| Publication Number | Publication Date |
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| CN101282146A CN101282146A (en) | 2008-10-08 |
| CN101282146B true CN101282146B (en) | 2012-07-18 |
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| CN2007100875569A Expired - Fee Related CN101282146B (en) | 2007-04-02 | 2007-04-02 | Method for controlling overload of downlink emitter power |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102209339A (en) * | 2010-03-29 | 2011-10-05 | 中兴通讯股份有限公司 | Detection method and control method of power congestion, system and apparatus thereof |
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- 2007-04-02 CN CN2007100875569A patent/CN101282146B/en not_active Expired - Fee Related
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| CN101282146A (en) | 2008-10-08 |
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Granted publication date: 20120718 Termination date: 20160402 |