CN100415041C - Method for dynamically adjusting CDMA system communication quality - Google Patents
Method for dynamically adjusting CDMA system communication quality Download PDFInfo
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- CN100415041C CN100415041C CNB2004101013344A CN200410101334A CN100415041C CN 100415041 C CN100415041 C CN 100415041C CN B2004101013344 A CNB2004101013344 A CN B2004101013344A CN 200410101334 A CN200410101334 A CN 200410101334A CN 100415041 C CN100415041 C CN 100415041C
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Abstract
The present invention discloses a method for dynamically adjusting CDMA system communication quality. The present invention can store more than one set of quality control parameters for each base station controlled by a base station controller and can divide the capacity of the base station into more than one grade, and then each set of quality control parameters is corresponding to the different capacity grade of the base stations. The present invention comprises that the base station controller monitors the capacity parameters on the base stations in real time, the base station controller can determine the current capacity grade of the base stations according to the parameters, and the base station controller send the corresponding quality control parameters of the current capacity grade of the base stations to the base stations and all mobile stations managed by the base stations. With the present invention, the communication quality of CDMA systems can be dynamically adjusted, radio resources of the CDMA systems can be sufficiently used under the condition of small current capacity of the base stations, and users' communication quality in the base station coverage area can be increased. When the current capacity of the base stations is large, the present invention can properly reduce users' communication quality so as to enlarge the capacity of the systems.
Description
Technical field
The present invention relates to code division multiple access (CDMA) technology, specially refer to a kind of method of dynamically adjusting the cdma system communication quality according to the current load in base station.
Background technology
Estimate two the most key indexs of the general use of performance of mobile communication system: one is the capacity of system, and another is the communication quality of system.Under normal conditions, the capacity of system is represented the number of users that this system can serve simultaneously, and the big more operator that then means of capacity can obtain more income; And this system of communication quality ordinary representation of system is the quality of service that the user provides, and the good more customer satisfaction that can reach high more that just means of communication quality equally also can be brought more income for operator.
Yet the capacity of cdma system and the communication quality of system are normally conflicting, and promptly on the one hand, the capacity that enlarges system is a cost with the communication quality of sacrificial system normally; And on the other hand, the communication quality that improves system is a cost with the capacity of sacrificial system normally also.Therefore, how making the capacity of cdma system and communication quality reach optimum state simultaneously, is the problem that present industry is extremely paid close attention to.
In existing C DMA system, each base station controller is all preserved the power contorl parameters and the switch decision parameter of all base stations uses of its management in its database, these parameters are all disposed in initialized process by cdma system, and remain unchanged usually.Wherein, power contorl parameters comprises: base station forward traffic channel maximum transmission power thresholding, base station forward traffic channel minimum emissive power thresholding, base station forward direction overhead channel transmitting power thresholding, forward direction target frame error rate thresholding, reverse target frame error rate thresholding or the like, base station controller can be by the transmitting power of above-mentioned these power contorl parameters control base stations and travelling carriage.Normally used switch decision parameter comprises: the Active Set maximum branch is counted thresholding, pilot tone increase thresholding, pilot tone deletion thresholding, pilot tone comparison threshold, pilot tone deletion timer duration, pilot tone increase intercept, pilot tone deletion intercept, dynamic soft handover slope or the like, and base station controller can carry out soft handover by above-mentioned these switch decision parameters control travelling carriages.For example, if the maximum transmission power thresholding of the forward traffic channel that the cdma system configurating base station uses is big more, then the operable power in base station is also just big more on the one hand, thereby can obtain better communication quality; But on the other hand because the base station used bigger transmitting power, can in the same cells or other users of neighbor cell bring interference, and in cdma system, the increase of interference will further cause the decline of power system capacity.Again for example, if the Active Set of system configuration size branches thresholding is big more, then on the one hand simultaneously can will be big more with the maximum number of the base station of mobile communications, thereby travelling carriage can obtain bigger soft handover gain, thus obtain better communication quality; But, on the other hand,, will cause the decline of power system capacity because travelling carriage has taken more wireless channel.
From top analysis as can be seen,, can reach the purpose of regulating communication quality between base station and the travelling carriage, it is commonly referred to as quality-controlling parameters here by adjusting above-mentioned power contorl parameters or switch decision parameter.
Usually, above-mentioned power contorl parameters and switch decision parameter that these can be used for regulating communication quality are the fixed values that is kept at the base station controller database, all travelling carriages that same base station covers all use identical parameter, and in the calling procedure of travelling carriage, these parameters all remain unchanged.Therefore, under the different situation of base station load, all be essentially identical by the obtainable communication quality of travelling carriage of this BTS management, that is to say, even the current load in this base station is very little, the travelling carriage of its management can not obtain better communication quality by idle Radio Resource; And under the very big situation of the current load in base station, jumbo requirement can not be satisfied by suitably reducing the communication quality of the travelling carriage of its management in the base station.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of method of dynamic adjustment cdma system communication quality, can be according to the size of the current load in base station, the communication quality of all travelling carriages in the adjustment base station range to a certain degree.
Method of the present invention is each base station preservation at least two group power control and switch decision parameter of its control at base station controller, and the load of base station is divided at least two grades, be provided with then respectively organize power control and the switch decision parameter corresponding one by one with different load amount grade; Said method comprising the steps of:
The load quantity parameter that a, base station controller real time monitoring base station report, and determine the load grade that this base station is current according to the current load quantity parameter that reports;
B, base station controller are according to the determined load grade of step a, all travelling carriages that power control that will be corresponding with this load grade and switch decision parameter send to base station and this BTS management, described base station and travelling carriage use power control and switch decision parameter regulation transmitting power or the switch decision parameter that receives, and return step a then.
Power control of the present invention and switch decision parameter comprise: base station forward traffic channel maximum transmission power thresholding, base station forward traffic channel minimum emissive power thresholding, base station forward direction overhead channel transmitting power thresholding, forward direction target frame error rate thresholding, reverse target frame error rate thresholding, Active Set maximum branch are counted thresholding, pilot tone increases thresholding, pilot tone deletion thresholding.
Described base station controller is preserved two groups of power controls and switch decision parameter for each base station of its control.
The described load quantity parameter of step a comprises the total transmitting power of base station forward, base station reverse channel total received power, the number of users of communicating by letter.
Described base station controller is provided with the upper and lower threshold value of each load quantity parameter in different load amount grade;
The current load grade of the described judgement of step a is specially: described base station controller compares the load quantity parameter that reports and this parameter of setting in the upper and lower threshold value of different load amount grade, determine the load grade that described base station is current.
Step b is described to be sent as: described base station controller sends to described base station by Abis interface with power control and switch decision parameter; Described base station by with in system parameters message or extended handoff direction messages the quality-controlling parameters that receives is transmitted to all travelling carriages of its management.
This shows, use the method for dynamic adjustment cdma system communication quality of the present invention and can choose different power control and soft-handoff parameters according to the grade of current base station load, on the one hand current load is hour in the base station, make full use of the Radio Resource of cdma system, improve all user's communications quality in this base station range to a certain extent; And when current load is very big in the base station on the other hand,, reduce each user's soft handover branches number by the frame error rate requirement of suitable reduction to each user, promptly by suitably reducing each user's communications quality, obtain bigger power system capacity.Therefore, method of the present invention can realize the dynamic equilibrium between power system capacity and the communication quality.
Description of drawings
Fig. 1 is the flow chart of the described dynamic adjustment cdma system communication quality method of a preferred embodiment of the invention.
Embodiment
For the purpose, technical scheme and the advantage that make invention is clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
In a preferred embodiment of the invention, the method of dynamic adjustment cdma system communication quality of the present invention is preserved two groups of communication quality Control Parameter that can be used for communication quality control for each base station of its control in advance in base station controller, one group is called the big parameter of load, when the current load in base station is bigger, use, help the power system capacity that provides bigger; One group is called load than small parameter, uses when the current load in base station is less, helps to utilize idle Radio Resource to improve communication quality.
Above-mentioned quality-controlling parameters comprises two classes: a class is a power contorl parameters, and another kind of is the switch decision parameter.Wherein, power contorl parameters is identical with power contorl parameters of the prior art, comprising: base station forward traffic channel maximum transmission power thresholding or the like.The switch decision parameter is also identical with switch decision parameter of the prior art, comprising: the Active Set maximum branch is counted thresholding, pilot tone increases thresholding, pilot tone deletion thresholding or the like.
In order to play the purpose of dynamic adjustment cdma system communication quality, should be provided with load than the base station forward traffic channel maximum transmission power thresholding in the small parameter greater than the base station forward traffic channel maximum transmission power thresholding in the big parameter of load, like this can be in the base station current load is hour by increasing the transmitting power of base station and travelling carriage, reach the purpose that improves communication quality between travelling carriage and the base station, when perhaps current load is big in the base station, by reducing the transmitting power of base station and travelling carriage, reach the purpose that increases power system capacity; Load perhaps can also be set counts thresholding than the Active Set maximum branch in the small parameter and counts thresholding greater than the Active Set maximum branch in the big parameter of load; Perhaps load increases thresholding than the pilot tone that the increase of the pilot tone in small parameter thresholding is lower than in the big parameter of load; Or load is deleted thresholding than the pilot tone that the deletion of the pilot tone in small parameter thresholding is lower than in the big parameter of load, so also can hour utilize bigger soft handover gain to realize improving the purpose of communication quality between travelling carriage and the base station in the current load in base station, when perhaps current load is big in the base station, by reducing soft handover gain, reach the purpose that increases power system capacity.In addition, in order further to increase the effect of dynamically adjusting communication quality, can also than small parameter two or more different power contorl parameters and switch decision parameter be set with load for the big parameter of load simultaneously according to the method described above.
Need to prove in addition, the described quality-controlling parameters of present embodiment includes but not limited to above-mentioned parameter, wherein, power contorl parameters can also comprise: base station forward traffic channel minimum emissive power thresholding, base station forward direction overhead channel transmitting power thresholding, forward direction target frame error rate thresholding, reverse target frame error rate thresholding, backward external ring power control set point thresholding or the like, the switch decision parameter can also comprise: pilot tone deletion thresholding, pilot tone comparison threshold, pilot tone deletion timer duration, pilot tone increase intercept, pilot tone deletion intercept, dynamic soft handover slope or the like.Also can realize dynamically adjusting the purpose of communication quality by regulating above-mentioned parameter.
Fig. 1 has shown the flow chart of the described method of present embodiment, and as shown in Figure 1, the described method of present embodiment mainly may further comprise the steps:
Step 101: the load quantity parameter that base station controller real time monitoring base station reports, the size of the load that the judgement base station is current, if the current load in base station is less, then execution in step 102; If the current load in base station is for bigger, then execution in step 103.
Described load quantity parameter comprises: the total transmitting power of base station forward, base station reverse channel total received power, the number of users of communicating by letter or the like, these parameters directly measure by the base station, and by and base station controller between Abis interface report base station controller.
The method of the current load in described judgement base station also can have a variety of.For example, can judge the load of current this base station according to the total transmitting power of the forward channel of base station.Determination methods is: base station controller preestablishes a total transmitting power threshold value of forward channel, if the total transmitting power of forward channel that the base station is detected is greater than the threshold value of setting then illustrate that the load of current base station is bigger, if the total transmitting power of forward channel that the base station is detected is less than the threshold value of setting then illustrate that the load of current base station is less.Use similar determination methods can also judge the load of current base station according to base station reverse channel total received power or the number of users of communicating by letter parameter.
Step 102: base station controller sends to all travelling carriages of base station and this BTS management with load than small parameter, and described base station and travelling carriage applied load amount carry out returning step 101 then alternately than small parameter.
Step 103: base station controller sends to all travelling carriages of base station and this BTS management with the big parameter of load, and the big parameter of described base station and travelling carriage applied load amount carries out returning step 101 then alternately.
In above-mentioned steps 102 and 103, base station controller sends to base station with above-mentioned load than small parameter or the big parameter of load by inner Abis interface; The base station is after receiving above-mentioned quality-controlling parameters, by with interior system parameters message or extended handoff direction messages the load that receives being sent to travelling carriage than small parameter or the big parameter of load.
This shows that the described method of the foregoing description can in the load of current base station hour by regulating the transmitting power or the switch decision parameter of base station and travelling carriage, dynamically be adjusted the communication quality between travelling carriage and the base station.
Need to prove, though in the preferred embodiment of the invention described above, base station controller is the base station of its control and has preserved the parameter of two groups of quality controls, be that load is than small parameter and the big parameter of load, but conspicuous, base station controller can be preserved two groups of above quality-controlling parameters, load with the base station is divided into a plurality of grades simultaneously, and this every group of quality-controlling parameters is corresponding one by one with different load grades respectively.Wherein, the quality-controlling parameters that uses when the load grade is higher is compared with the quality-controlling parameters that uses when the load grade is low, has less base station forward traffic channel maximum transmission power, or less base station forward traffic channel minimum emissive power, or less Active Set maximum branch counts thresholding, or bigger pilot tone increases thresholding, or bigger pilot tone deletion thresholding, or be combination in any of above-mentioned condition or the like, to obtain bigger power system capacity.Base station controller is selected the quality-controlling parameters of corresponding grade according to the current load quantity parameter that the base station reports, and regulates the purpose of communication quality between travelling carriage and the base station to reach classification.
When judging current load grade, base station controller should at first be provided with the upper and lower threshold value of each load quantity parameter in different load amount grade; The load quantity parameter that reports according to the base station is determined the load grade that this base station is current then, and will the quality-controlling parameters corresponding send to this grade the base station with and all travelling carriages of management.
More than lift preferred embodiment; the purpose, technical solutions and advantages of the present invention have been carried out further detailed description; institute is understood that; the above is the preferred embodiments of the present invention; not in order to show the present invention; within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. method of dynamically adjusting CDMA system communication quality, it is characterized in that, at base station controller is each base station preservation at least two group power control and switch decision parameter of its control, and the load of base station is divided at least two grades, be provided with then respectively organize power control and the switch decision parameter corresponding one by one with different load amount grade; Said method comprising the steps of:
The load quantity parameter that a, base station controller real time monitoring base station report, and determine the load grade that this base station is current according to the current load quantity parameter that reports;
B, base station controller are according to the determined load grade of step a, all travelling carriages that power control that will be corresponding with this load grade and switch decision parameter send to base station and this BTS management, described base station and travelling carriage use power control and switch decision parameter regulation transmitting power or the switch decision parameter that receives, and return step a then.
2. the method for claim 1, it is characterized in that described power control and switch decision parameter comprise: base station forward traffic channel maximum transmission power thresholding, base station forward traffic channel minimum emissive power thresholding, base station forward direction overhead channel transmitting power thresholding, forward direction target frame error rate thresholding, reverse target frame error rate thresholding, Active Set maximum branch are counted thresholding, pilot tone increases thresholding, pilot tone deletion thresholding.
3. the method for claim 1 is characterized in that, base station controller is preserved two groups of power controls and switch decision parameter for each base station of its control.
4. the method for claim 1 is characterized in that, the described load quantity parameter of step a comprises the total transmitting power of base station forward, base station reverse channel total received power, the number of users of communicating by letter.
5. the method for claim 1 is characterized in that, base station controller is provided with the upper and lower threshold value of each load quantity parameter in different load amount grade; The current load grade of the described judgement of step a is specially: described base station controller compares the load quantity parameter that reports and this parameter of setting in the upper and lower threshold value of different load amount grade, determine the load grade that described base station is current.
6. the method for claim 1 is characterized in that, step b is described to be sent as: described base station controller sends to described base station by Abis interface with power control and switch decision parameter; Described base station by with in system parameters message or extended handoff direction messages all travelling carriages that the power control that receives and switch decision parameter are transmitted to its management.
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| CNB2004101013344A CN100415041C (en) | 2004-12-17 | 2004-12-17 | Method for dynamically adjusting CDMA system communication quality |
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| CNB2004101013344A CN100415041C (en) | 2004-12-17 | 2004-12-17 | Method for dynamically adjusting CDMA system communication quality |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100502581C (en) * | 2006-07-31 | 2009-06-17 | 亿阳信通股份有限公司 | Carrier configuration regulating method based on wireless network dynamic load capacity |
| US8031655B2 (en) * | 2006-10-03 | 2011-10-04 | Industrial Technology Research Institute | Systems and methods for determining granularity level of information about buffer status |
| WO2009072286A1 (en) * | 2007-12-05 | 2009-06-11 | Panasonic Corporation | Communication system, resource management device, wireless base station and wireless communication terminal |
| US8718075B2 (en) | 2009-08-17 | 2014-05-06 | Telefonaktiebolaget L M Ericsson (Publ) | Method and apparatus for adapting policy control |
| CN101877829B (en) * | 2010-06-22 | 2012-08-29 | 上海交通大学 | Power control method for realizing load balance |
| CN102378298B (en) * | 2010-08-04 | 2014-08-13 | 中国电信股份有限公司 | CDMA (Code Division Multiple Access) soft switching method, base station and system |
| CN102325384B (en) * | 2011-05-17 | 2013-12-25 | 深圳国威电子有限公司 | Treatment method for out-of-limit locking of sub-machine of base station |
| CN102598787A (en) | 2011-12-22 | 2012-07-18 | 华为技术有限公司 | The Method For Switching Base Station,base Station Controller And Mobile Terminal |
| CN105960006B (en) * | 2016-05-04 | 2019-08-02 | Oppo广东移动通信有限公司 | A kind of regulating power consumption method, apparatus and mobile terminal |
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| CN1384633A (en) * | 2001-04-30 | 2002-12-11 | 华为技术有限公司 | Dynamic capacity regulating method for CDMA communication system |
| WO2004004396A1 (en) * | 2002-06-26 | 2004-01-08 | Nokia Corporation | Method and network element for optimisation of radio resource utilisation in a radio access network |
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| US20020077138A1 (en) * | 1999-03-15 | 2002-06-20 | Gunnar Bark | Adaptive power control in a radio communications systems |
| CN1384633A (en) * | 2001-04-30 | 2002-12-11 | 华为技术有限公司 | Dynamic capacity regulating method for CDMA communication system |
| WO2004004396A1 (en) * | 2002-06-26 | 2004-01-08 | Nokia Corporation | Method and network element for optimisation of radio resource utilisation in a radio access network |
| CN1533200A (en) * | 2003-03-26 | 2004-09-29 | 联想(北京)有限公司 | Method for dynamically regulating radio local area network base station cut-in point coverage |
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