CN101557638B - Method of reverse power overload control - Google Patents
Method of reverse power overload control Download PDFInfo
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- CN101557638B CN101557638B CN2008100897628A CN200810089762A CN101557638B CN 101557638 B CN101557638 B CN 101557638B CN 2008100897628 A CN2008100897628 A CN 2008100897628A CN 200810089762 A CN200810089762 A CN 200810089762A CN 101557638 B CN101557638 B CN 101557638B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000000295 complement effect Effects 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 claims description 2
- 239000000284 extract Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 238000002054 transplantation Methods 0.000 abstract description 3
- 238000004891 communication Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- Y02B60/50—
Abstract
The invention discloses a method of reverse power overload control, which relates to a CDMA communication system. In the method, a base station collects receiving signals periodically, M collected receiving signals are sorted according the strength values, and the Nth signal strength value and the M-N+lth signal strength value are extracted, wherein M is more than 3, and N is more than 1 and less than M; the absolute value of the difference values between the two signal strength values is calculated, the comparison between the absolute value of the difference value and an overload threshold value which is set in advance is carried out, and the corresponding call control is carried out according to the comparison result. The technical scheme of the invention shortens the power control cycleto the utmost extent, thereby reducing the influence on the system stability during the overload control process and having better transplantation effect.
Description
Technical field
The content that the present invention relates to is the method about a kind of overload of reverse power control of code division multiple access (CDMA) communication system.
Background technology
Code division multiple access (CDMA) is a kind of multiple access modulation technique commonly used, also is the mainstream technology in the third generation mobile system, and extremely industry is paid close attention to.In cdma system, power control is considered to the core of all key technologies.Because cdma system is a system from interference; So in order to bring into play the performance of its system; Inevitably to carry out the power control of preceding, reverse link, thereby come the operation that the assurance system can be good, therefore should load factor be controlled within certain scope.This just needs the present case of real-time grasp load factor, so that distribute and set up reverse complemental channel according to the Radio Resource of current system.The load factor of system can receive the influence of environment and number of users and change at any time, and therefore the monitoring load rate just becomes one of major technique of code division multiple access system in real time.
Patent US6173187; " METHOD OF SETTING LOAD GOAL AND RADIOSYSTEM " is according to judge the load size at the rate of change of certain section temporal power; This method is no doubt simple; If but the just very difficult objective judgement overload situations of significant change does not take place power on during this period of time, no doubt system can not stablize.
Patent CN01126239; " a kind of overload of reverse power control method " its basic thought is in the overload control cycle, to gather two groups of signal measurements relatively back and threshold value are handled after relatively once more; This no doubt more superior than preceding a kind of method, also make system more stable.But in method step, receive the constraint of " will guarantee once transship to gather more than 100 points in the control cycle "; This makes the overload control cycle receive the limit value of method; Therefore can have influence on the real-time monitoring of system, thereby have influence on the stability of system probably.
Summary of the invention
The technical problem that the present invention will solve provides a kind of method of overload of reverse power control, thereby alleviates the influence to the stability of a system.
In order to address the above problem; The invention provides a kind of method of overload of reverse power control, the reception signal is regularly gathered in the base station in this method, receives signal with the M that collects and sorts by its intensity level size; Therefrom extract N and the individual signal strength values of M-N+1; Wherein M＞3,1＜N＜M, and M, N are integer;
Calculate the absolute difference of above-mentioned two signal strength values, this absolute difference and the overload threshold value that sets are in advance compared, carry out respective call control according to comparative result.
Further, the value of overload threshold described in the said method comprises the first overload threshold value, the second overload threshold value and the 3rd overload threshold value, wherein the first overload threshold value＜second overload threshold value＜the 3rd overload threshold value;
When the said absolute difference of said base station judges during less than the said first overload threshold value, said base station allows all flash-ups to require and link establishment;
When the said absolute difference of said base station judges was between the said first overload threshold value and the second overload threshold value, said base station allowed the foundation of primary channel or low speed complement channel;
When the said absolute difference of said base station judges was between said second overload threshold value and said the 3rd overload threshold value, said base station only allowed the soft handover request;
When the said absolute difference of said base station judges during greater than said the 3rd overload threshold value, all link establishments and flash-up requirement will be forbidden in said base station.
The span of above-mentioned M is: 4≤M≤100.
Further, the above-mentioned first overload threshold value is that the gross power that carrier frequency is used multiply by 0.8 value, and the above-mentioned second overload threshold value is that the gross power that carrier frequency is used multiply by 0.85 value, and above-mentioned the 3rd overload threshold value is that the gross power that carrier frequency is used multiply by 0.9 value.
Technical scheme of the present invention has at utmost shortened power control period, thereby has alleviated in the overload control procedure influence to the stability of a system, and has a transplantation effect preferably.
Description of drawings
Fig. 1 is the flow chart that the present invention realizes overload of reverse power control.
Embodiment
Below in conjunction with accompanying drawing and embodiment technical scheme of the present invention is done further explain.
In a kind of process of overload of reverse power control; Three overload threshold values are at first confirmed in the base station; The i.e. first overload threshold value, the second overload threshold value and the 3rd overload threshold value, wherein the first overload threshold value＜second overload threshold value＜the 3rd overload threshold value is preferred; The first overload threshold value is that gross power that carrier frequency is used multiply by and is about 0.8 numerical value and confirms; The second overload threshold value is that gross power that carrier frequency is used multiply by and is about 0.85 numerical value and confirms, the 3rd overload threshold value is that gross power that carrier frequency is used multiply by and is about 0.9 numerical value and confirms, carries out overload of reverse power control according to each step shown in Figure 1 then:
Step 101: at regular intervals, base station receiver is gathered the individual semaphore of M (wherein, M is the integer greater than 3);
In this step, gather number M and set in advance by base station system, the time interval of adjacent twice acquisition operations is the processing time T and the product of gathering number M of each collection point, and wherein the shortest time of adjacent twice acquisition operations is spaced apart 4T.
Step 102: arrange the signal that receives by its intensity level from small to large the base station;
Certainly in other embodiments, the base station also can be arranged according to signal strength signal intensity from big to small.
Step 103: the base station will arrange sequence number be N signal with arrange the signal of sequence number and carry out the difference computing and get its absolute value for (M-N+1); (wherein, 1＜N＜M)
Step 104: whether judge above-mentioned absolute difference less than the first good overload threshold value of predefined, if, carry out a, otherwise, step 105 got into;
Step 105: whether judge above-mentioned absolute difference less than the second good overload threshold value of predefined, if, carry out b, otherwise, step 106 got into;
Step 106: whether judge above-mentioned absolute difference less than the 3rd good overload threshold value of predefined, if carry out c, otherwise return step 101 after carrying out d.
A: the base station also will allow all flash-ups to require and link establishment;
B: the base station allows the foundation of primary channel or low speed complement channel;
C: the base station only allows the soft handover request;
D: all link establishments and flash-up requirement will be forbidden in the base station.
Can find out from the foregoing description, because technical scheme of the present invention is carried out computing to the semaphore sequence number that collects, rather than relative position; Thereby reduced computational complexity and improved the accuracy of position, collection point, in addition, adopted comparison algorithm to come power controlling in the technical scheme of the present invention; Thereby it is compared with prior art relatively stable; Promptly alleviated in the overload control procedure influence to the stability of a system, and need not measure the size of extraneous low noise, overload judges that response cycle is short; Under perfect condition can with the time of gathering the signaling point more than 4 as power control period; In addition, the inventive method also has transplantation effect preferably, promptly can be used for carrying out the test of code division multiple access system reverse capacity.
The present invention also can have in other multiple instances; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those skilled in the art can make corresponding change and distortion according to the present invention, but these corresponding changes and distortion all should belong within the protection range of the appended claim of the present invention.
Claims (3)
1. the method for an overload of reverse power control is characterized in that,
The reception signal is regularly gathered in the base station, receives signal with the M that collects and sorts by its intensity level size, therefrom extracts N and the individual signal strength values of M-N+1, wherein M＞3,1＜N＜M;
Calculate the absolute difference of above-mentioned two signal strength values, this absolute difference and the overload threshold value that sets are in advance compared, carry out respective call control according to comparative result;
Said overload threshold value comprises the first overload threshold value, the second overload threshold value and the 3rd overload threshold value, wherein the first overload threshold value＜second overload threshold value＜the 3rd overload threshold value;
When the said absolute difference of said base station judges during less than the said first overload threshold value, said base station allows all flash-ups to require and link establishment;
When the said absolute difference of said base station judges was between the said first overload threshold value and the second overload threshold value, said base station allowed the foundation of primary channel or low speed complement channel;
When the said absolute difference of said base station judges was between said second overload threshold value and said the 3rd overload threshold value, said base station only allowed the soft handover request;
When the said absolute difference of said base station judges during greater than said the 3rd overload threshold value, all link establishments and flash-up requirement will be forbidden in said base station.
2. the method for claim 1 is characterized in that, the span of said M is: 4≤M≤100.
3. method as claimed in claim 2; It is characterized in that; The said first overload threshold value is that the gross power that carrier frequency is used multiply by 0.8 value, and the said second overload threshold value is that the gross power that carrier frequency is used multiply by 0.85 value, and said the 3rd overload threshold value is that the gross power that carrier frequency is used multiply by 0.9 value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100897628A CN101557638B (en) | 2008-04-10 | 2008-04-10 | Method of reverse power overload control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100897628A CN101557638B (en) | 2008-04-10 | 2008-04-10 | Method of reverse power overload control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101557638A CN101557638A (en) | 2009-10-14 |
| CN101557638B true CN101557638B (en) | 2012-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100897628A Expired - Fee Related CN101557638B (en) | 2008-04-10 | 2008-04-10 | Method of reverse power overload control |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300473A (en) * | 1999-02-13 | 2001-06-20 | 三星电子株式会社 | Device and method for controlling transmission on reverse link in mobile communication system |
| CN1398077A (en) * | 2001-07-14 | 2003-02-19 | 深圳市中兴通讯股份有限公司 | Method for controlling overload of reverse power |
| CN1564478A (en) * | 2004-03-12 | 2005-01-12 | 中兴通讯股份有限公司 | Reverse external ring power control method |
-
2008
- 2008-04-10 CN CN2008100897628A patent/CN101557638B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300473A (en) * | 1999-02-13 | 2001-06-20 | 三星电子株式会社 | Device and method for controlling transmission on reverse link in mobile communication system |
| CN1398077A (en) * | 2001-07-14 | 2003-02-19 | 深圳市中兴通讯股份有限公司 | Method for controlling overload of reverse power |
| CN1564478A (en) * | 2004-03-12 | 2005-01-12 | 中兴通讯股份有限公司 | Reverse external ring power control method |
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| CN101557638A (en) | 2009-10-14 |
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