CN1599471A - Realization method and device for controlling load balance in communication system - Google Patents
Realization method and device for controlling load balance in communication system Download PDFInfo
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- CN1599471A CN1599471A CN 03159529 CN03159529A CN1599471A CN 1599471 A CN1599471 A CN 1599471A CN 03159529 CN03159529 CN 03159529 CN 03159529 A CN03159529 A CN 03159529A CN 1599471 A CN1599471 A CN 1599471A
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Abstract
This invention provides a method for controlling load balance including: testing load of each carrier local area periodically, determining carrier local areas which needs to controll the load balance, controlling them in load balance. A device is also disclosed including: a load test module, a module for determining control of the load balance and a load balance module. Frequency switch is carried out to the mobile terminal users with heavy load in the area needing load balance control by a blind switch mode to avoid testing different frequencies with the compression mode at the same time, and reduces times of different frequency switch.
Description
Technical field
The present invention relates to the network communications technology field, be specifically related to a kind of controlling load balance and device.
Background technology
CDMA in the mobile communication technology field (code division multiple access access) technology is full-fledged gradually.Use the initial stage in CDMA technology, because the telephone traffic of the cdma system of employing CDMA technology is little, a carrier frequency often covers bigger zone.Increasing along with the CDMA mobile subscriber, a carrier frequency is difficult to satisfy growing telephone traffic demand, tends to increase a carrier frequency at hot zones this moment and absorbs telephone traffic.The situation that a plurality of carrier frequency cover same area so just appears.As shown in Figure 1, in Fig. 1, each circle is represented a sub-district, and the coverage of setting carrier frequency 1 is bigger, and carrier frequency 1 usefulness f1 represents; The sub-district that indicates three round places of A, B, C among the figure is the big focus geographic location area of telephone traffic, for A, B, three sub-districts of C increase carrier frequency 2 respectively, represents with f2.
In the cdma system of reality, because the interference in the variation of the new access of calling out of CDMA travelling carriage, location of mobile station, travelling carriage transmission and received signal rate variations, the external world and the factors such as variation of environment all can cause the load generation change at random of each carrier frequency, this the situation of laod unbalance will occur, so-called load balance mainly is meant the load balance between the different carrier frequency in the areal.The carrier frequency load that laod unbalance can cause is lighter, and the carrier frequency load that has is heavier.The load of carrier frequency gentlier can make the resource of communication system be not fully utilized.The heavier meeting of the load of carrier frequency causes mobile subscriber's communication quality to be had a strong impact on.Because cdma system is the soaring mutually system of self-interference, to make the cdma system performance worsen rapidly in case the load of cdma system acquires a certain degree, cause QoS (service quality) professional in the system can not be met even occur serious consequences such as a large amount of CDMA mobile subscriber call drops.
For avoiding the appearance of above-mentioned this different carrier frequency laod unbalance situations, just need control the selection and the utilization of communication system resource, to reach the load balance of different carrier frequency, effectively utilize the purpose of communication system resource as far as possible.In order to reach load balance, need carry out alien frequencies to the mobile phone users in the sub-district and switch, the travelling carriage in the carrier frequency that load is heavier switches in the lighter carrier frequency of load.
In the prior art, travelling carriage just can be chosen in the alien-frequency district under following situation usually:
The travelling carriage that is in communications status indicates the Serving cell signal quality to be lower than certain thresholding in the measurement report that mobile communication network equipment reports, mobile communication network equipment just can notify travelling carriage to start different-frequency measure, by measuring inter-frequency neighboring cell, quality of mobile communication network choice of equipment switches in this alien-frequency district by travelling carriage by carrying out the alien frequencies direct-cut operation preferably and the sub-district of satisfying the switch decision condition.
The process of utilizing prior art to carry out the alien frequencies switching is described below in conjunction with Fig. 2.Fig. 2 is the carrier cell schematic diagram that different carrier frequency cover same area.
In Fig. 2, establish the carrier cell of f1 and be designated A1 in the a-quadrant, f1 is designated B1 at the carrier cell in B zone, and f1 is designated C1 at the carrier cell in C zone; If f2 is designated A2 at the carrier cell of a-quadrant, f2 is designated B2 at the carrier cell in B zone, and f2 is designated C2 at the carrier cell in C zone.
If the load of carrier cell A1 is very heavy, according to prior art, only be positioned at carrier cell A1 edge for the travelling carriage that is in communications status among the carrier cell A1, after to be moving table measuring to the signal quality of carrier cell A1 be lower than certain thresholding, mobile communication network equipment just notified travelling carriage to start different-frequency measure.If travelling carriage is a single-receiver, so just must start compact model to inter-frequency neighboring cell, comprise carrier cell A2, B2, C2, all carry out different-frequency measure, and measurement result reported mobile communication network equipment, mobile communication network equipment select quality better and the carrier cell that satisfies the alien frequencies switching condition as the Target cell that alien frequencies switches, carry out the process of alien frequencies direct-cut operation then.If the load of carrier cell A1 is very heavy, for the mobile phone users of carrier cell A1 central area, prior art can't switch to it among carrier frequency f2.Obviously, utilize prior art can not realize fully that carrier frequency f2 absorbs telephone traffic, alleviates the purpose of carrier frequency f1 load.
From the description of technique scheme as can be seen, when the travelling carriage that is in communications status only is in the Serving cell edge, just can carry out different-frequency measure after the pilot signal quality that promptly measures Serving cell is lower than certain thresholding, switch in another carrier frequency by carrying out the alien frequencies direct-cut operation.When travelling carriage was positioned at the Serving cell center, when the pilot signal quality that promptly measures Serving cell was higher than certain thresholding, no matter how heavy the load of Serving cell is, also can not carry out different-frequency measure all the time, can not switch in another carrier frequency.Therefore existing technology can not really play the effect of load balance.
Must use compact model when single-receiver carries out different-frequency measure, the use meeting of compact model causes harmful effect to the performance of cdma system.Cdma communication system is to adopt code word to distinguish different mobile phone users, mobile phone users can be continuous always in time the signal of reception frequency, " idle time slot " that they no longer have resembling among the TDMA (time division multiple access) measures different frequency, therefore, for the travelling carriage that has only a receiver, realize measurement to different frequency signals, just must use compact model, in radio frames, form the transmission " space " of a period of time by technology such as sign indicating number punchings, in this section space, any data are not transmitted to travelling carriage in the base station, travelling carriage can be transformed into its radio-frequency transmitter the target frequency that needs supervision, and target frequency is measured.Technology such as sign indicating number punching etc. has reduced the redundancy of data, and according to information theory principle, in order to remedy this loss, the data after the punching must be with high power transmission more, because CDMA is the system that self-interference rises mutually, the increase of this power has influenced the performance of cdma system.
Summary of the invention
The objective of the invention is to, a kind of controlling load balance and device are provided, the load that utilizes mobile communication network equipment initiatively regularly to detect each carrier cell really realizes the load balance control of each carrier cell, thereby has reached the purpose that improves the mobile communcations system performance.
For achieving the above object, a kind of controlling load balance provided by the invention comprises:
A, timing detect the load of each carrier cell;
B, determine the carrier cell of needs control load balance according to testing result;
C, the described carrier cell that needs the control load balance is carried out load balance control.
Described step a comprises:
Regularly detect the load of each carrier cell according to the load detecting timer.
Described step b comprises:
B1, according to the carrier cell of the light carrier cell of the load detecting result of described each carrier cell carrier cell that load is heavy and load as needs control load balance.
Described step b1 comprises:
Determine the underloading of the heaviest and load of load sub-district frequently according to the load detecting result of described each carrier cell;
According to the absolute thresholding of predetermined load, predetermined load difference threshold judge the underloading of the heaviest and load of load frequently the sub-district whether be the carrier cell of needs control load balance;
If the difference of the load of the most heavily loaded frequency of load sub-district underloading load of sub-district frequently of the heaviest and load greater than the absolute thresholding of described predetermined load and load is greater than described predetermined load difference threshold, the underloading of the heaviest and load of described load sub-district frequently is the carrier cell that needs the control load balance;
Otherwise, the underloading of described load the most heavily loaded frequency sub-district and load frequently the sub-district for not needing the carrier cell of control load balance.
Described step c comprises:
C1, begin be to switch the number of retries metering;
C2, need in the most heavily loaded frequency of the load sub-district to determine alien frequencies to switch to the underloading of the load mobile phone users in the sub-district frequently;
C3, described mobile phone users is carried out alien frequencies switch;
C4, judge that described alien frequencies switches whether success;
If the alien frequencies handover success finishes this load balance control, the load detecting timer resets;
If alien frequencies switches unsuccessful, the metering value of switching number of retries increases progressively, and judges that whether the metering value of switching number of retries is greater than switching number of retries;
If be not more than the switching number of retries, return step c2;
If greater than switching number of retries, finish this load balance control, the load detecting timer resets.
Described step c2 comprises:
Obtain the load of the mobile phone users of each communication state in the most heavily loaded frequency of the load sub-district;
Obtain the underloading of the load of the most heavily loaded frequency of load sub-district and the load average of the load difference of sub-district frequently;
The mobile phone users that load is not more than load maximum in the mobile phone users of described average carries out the mobile phone users that alien frequencies switches as needs.
If use another kind of method, described step c2 comprises:
Obtain the professional normalization factor of the mobile phone users of each communication state in the most heavily loaded frequency of the load sub-district;
The mobile phone users that professional normalization factor is not more than professional normalization factor maximum in the mobile phone users of professional normalization factor thresholding carries out the mobile phone users that alien frequencies switches as needs.
The professional normalization factor K of described mobile phone users is:
K=10
(y-x)/10* p * R
Current business/ R
Benchmark service
Wherein: p is an activity factor; X is the desired value of benchmark service signal interference ratio; Y is the desired value of current business signal interference ratio; R
Current businessData rate for current business; R
Benchmark serviceData rate for benchmark service.
The present invention also provides the device of control load balance in a kind of communication system, comprising:
Load detecting module: regularly detect the load of each carrier cell, and the load of detected each carrier cell is transferred to definite control load balance module;
Determine the control load balance module: the load according to each next carrier cell of described load detecting module transmission determines that needs carry out the carrier cell of load balance control, and the described definite carrier cell of notification payload balance module need carry out load balance control;
The load balance module: the mobile phone users that according to the information of described definite control load balance module notice needs is carried out in the carrier cell of load balance control carries out load balance control.
Described load balance module comprises:
Determine the mobile phone users submodule: determine that described needs carry out the mobile phone users that needs to carry out the alien frequencies switching in the carrier cell of load balance control, and notice alien frequencies switching submodule need be carried out the mobile phone users that alien frequencies switches;
Alien frequencies switching submodule: the needs of described definite mobile phone users submodule notice are carried out mobile phone users that alien frequencies switches carry out alien frequencies and switch.
From technique scheme of the present invention as can be seen, the present invention is by the regularly load of each carrier cell of detection of active of mobile communication network equipment, set absolute thresholding of load and load difference thresholding and determine to carry out the carrier cell of load balance control, do not need mobile phone users to carry out different-frequency measure, by blind switching mode load is weighed, the mobile phone users that need carry out in the carrier cell of load balance control switches in the light alien-frequency district of load, thereby, when the carrier cell load is heavy, even mobile phone users is in the Serving cell center, also can be switched to the light alien-frequency district of load; Simultaneously because the present invention is carrying out alien frequencies when switching, adopt the method for determining mobile phone users load or the professional normalization factor of definite mobile phone users to choose and carry out the mobile phone users that alien frequencies switches, reduced the number of times that alien frequencies switches to greatest extent, the load that has guaranteed the carrier cell that alien frequencies switching back loading is light can sharply not increase the weight of real, the high efficiency purpose that realizes the control load balance; And technical scheme of the present invention has avoided mobile phone users to use compact model to carry out different-frequency measure and the problem of the high power transmission that causes; Thereby realized improving the purpose of communication system performance.
Description of drawings
Fig. 1 is an overloading frequency overlay area schematic diagram in the communication system;
Fig. 2 is the carrier cell schematic diagram that different carrier frequency cover same area in the communication system;
Fig. 3 is the flow chart of control load balance of the present invention;
Fig. 4 is the device of control load balance of the present invention.
Embodiment
Core concept of the present invention is the load of the timing of mobile communication network equipment, each carrier cell of detection initiatively, and determine the carrier cell of the overweight and underload of load, needs control load balance load balance control to be carried out in the described sub-district of control load balance that needs according to testing result.
Mobile communication network equipment can be realized the regularly load of each carrier cell of detection of active by timer, and as setting the load detecting timer, the load detecting timer expiry is the load of each carrier cell of mobile communication network Equipment Inspection then.
After mobile communication equipment detects the load of each carrier cell, need determine to carry out the sub-district of load control, its implementation is: absolute thresholding of load and load difference thresholding are set.The purpose that the absolute thresholding of load is set is for the load state of judging carrier cell is gently or heavily, if the load of different carrier cells all is a underload, just there is no need to carry out the load adjustment.Since the load of each carrier cell be fluctuation, change at any time, so can avoid the fluctuation in the load among a small circle of different carrier cells to cause the load between the different carrier frequency to adjust back and forth by the load difference thresholding is set.
From detected each carrier cell, choose the underloading of a load the most heavily loaded frequency sub-district and load sub-district frequently.If satisfying following two conditions simultaneously, the load of two carrier cells of this that choose determines that these two carrier cells are carrier cells that needs carry out the control load balance.
Condition 1: the load of the most heavily loaded frequency of load sub-district need be greater than the absolute thresholding of load.
Condition 2: the difference of the load of sub-district need be greater than the load difference thresholding frequently for the underloading of the load of the most heavily loaded frequency of load sub-district and load.
If these two conditions can not satisfy simultaneously, determine that then these two carrier cells of choosing do not need to carry out load balance control, this load balance control is finished, and the load detecting timer resets.
If these two conditions satisfy simultaneously, determined that then above-mentioned two carrier cells choosing are the carrier cells that need carry out load balance control.Need carry out alien frequencies to the mobile phone users in the most heavily loaded frequency of the load sub-district switches.It is provided by the invention that mobile phone users in the most heavily loaded frequency of the load sub-district is carried out the method that alien frequencies switches is blind switching method, promptly select the mobile phone users in the most heavily loaded frequency of the load sub-district, these selected mobile phone users do not need to carry out different-frequency measure, directly issue the alien frequencies switching command by mobile communication network equipment, the mobile phone users that notice is chosen switches in the alien-frequency district, thereby, even the mobile phone users in the most heavily loaded frequency of the load sub-district is in the center of this carrier cell, also may be switched to the lightest alien-frequency district of load.Thereby the load that can realize controlling alien-frequency district fully reaches the purpose of balance.This blind switching mode provided by the invention is enabled the problem that compact model carries out the high power transmission that different-frequency measure causes when having avoided mobile phone users for single-receiver.
The present invention is for fear of making after alien frequencies switches the underloading load of sub-district frequently of load can sharply not increase the weight of, in the two kinds of methods that adopted of choosing of the mobile phone users that alien frequencies is switched:
First method is: the underloading of the load of the most heavily loaded frequency of computational load sub-district and the load difference of the load of sub-district frequently at first, and set-up and calculated result is Ldiff; Set n the communication terminal user who is in communication state arranged in the most heavily loaded frequency of the load sub-district, the load that takies respectively is L1, L2, .., Ln, in these mobile phone users, select load to be not more than Ldiff/2's and the load maximum mobile phone users, the mobile phone users that switches as alien frequencies.The mobile phone users that load is not more than Ldiff/2 is for the load that makes two sub-districts as far as possible tends to balance as the mobile phone users that alien frequencies switches, and avoids sharply increasing the weight of because of the mobile phone users alien frequencies makes the underloading load of sub-district frequently of load after switching.Load is not more than Ldiff/2's and the load maximum mobile phone users as the mobile phone users that alien frequencies switches, has reduced the number of times that alien frequencies switches to greatest extent, the load balance control of high efficiency realization carrier cell.
In order better to reach the purpose of load balance between the control alien-frequency district, can set the switching number of retries, when carrying out the alien frequencies switching at the mobile phone users of choosing for the first time alien frequencies to switch and to it, beginning is to switch the number of retries metering.If to the mobile phone users alien frequencies handover success of choosing, this load balance control finishes.The load detecting timer resets, and detects the load of each carrier cell when it is overtime once more, carries out load balance control next time.If unsuccessful to the mobile phone users alien frequencies switching of choosing, the metering value of switching number of retries increases progressively.Judge this metering value whether greater than switching number of retries, if not greater than, in load is not more than Ldiff/2's and the load maximum mobile phone users, choose other mobile phone users again according to said method.If greater than switching number of retries, then this load balance control finishes.The load detecting timer resets, and detects the load of each carrier cell when it is overtime once more, carries out load balance control next time.
This method provided by the invention is applicable to that mobile communication network equipment can calculate the situation of the load of determining each mobile phone users, if mobile communication network equipment can not be determined the load of each mobile phone users, can use the another kind of introducing below provided by the invention to choose the mobile phone users method that alien frequencies switches so.
Second method is: setting professional normalization factor thresholding is Kmax, setting has n the communication terminal user who is in communication state in the most heavily loaded frequency of the load sub-district, calculating the professional normalization factor of determining each mobile phone users respectively is K1, K2, .., Kn.In these mobile phone users, select professional normalization factor to be not more than Kmax's and professional normalization factor maximum mobile phone users, the mobile phone users that switches as alien frequencies.Professional normalization factor is not more than the mobile phone users of the mobile phone users of Kmax as the alien frequencies switching, be for the load that makes two sub-districts as far as possible tends to balance, avoid sharply increasing the weight of because of the mobile phone users alien frequencies makes the underloading load of sub-district frequently of load after switching.Professional normalization factor is not more than Kmax's and professional normalization factor maximum mobile phone users as the mobile phone users that alien frequencies switches, has reduced the number of times that alien frequencies switches to greatest extent, the high efficiency load balance control that has realized carrier cell.
Equally, in order better to reach the purpose of load balance between the control alien-frequency district, can set the switching number of retries, when carrying out the alien frequencies switching at the mobile phone users of choosing for the first time alien frequencies to switch and to it, beginning is to switch the number of retries metering.If to the mobile phone users alien frequencies handover success of choosing, this load balance control finishes.The load detecting timer resets, and detects the load of each carrier cell when it is overtime once more, carries out load balance control next time.If unsuccessful to the mobile phone users alien frequencies switching of choosing, the metering value of switching number of retries increases progressively.Judge this metering value whether greater than switching number of retries, if not greater than, in professional normalization factor is not more than Kmax's and professional normalization factor maximum mobile phone users, choose other mobile phone users according to said method again.If greater than switching number of retries, then this load balance control finishes.The load detecting timer resets, and detects the load of each carrier cell when it is overtime once more, carries out load balance control next time.
Professional normalization factor in the said method is represented the ratio of the carrier/interface ratio of current business with respect to the benchmark service carrier/interface ratio, represents promptly also what benchmark services are current business be equivalent to.
Benchmark service can be by the business under certain speed of mobile communication network choice of equipment as benchmark service.For example, mobile communication network choice of equipment speed is that the speech business of 12.2kbps is as benchmark service.The accurate professional signal interference ratio Eb/No desired value of bidding is xdB, and data rate is R
Benchmark serviceKbps; The signal interference ratio Eb/No desired value of current business is ydB, and data rate is R
Current businessKbps.
Because signal interference ratio Eb/No and carrier/interface ratio Ec/No are tied to form upright just like ShiShimonoseki: Eb/No=W/R * Ec/No; Wherein, W is a channel width, and R is a data rate, so have:
(Ec/No)
Benchmark service=(Eb/No)
Benchmark service* R
Benchmark service/ W=10
X/10* R
Benchmark service/ W;
(Ec/No)
Current business=(Eb/No)
Current business* R
Current business/ W=10
Y/10* R
Current business/ W;
Professional normalization factor K then is:
K=(Ec/No)
Current business/ (Ec/No)
Benchmark service=10
(y-x)/10* R
Current business/ R
Benchmark service
If consider the activity factor of current business, then professional normalization factor expression is:
K=10
(y-x)/10* p * R
Current business/ R
Benchmark service
Wherein p is an activity factor, and this is owing to the use of voice activation detection technique, the data service reasons such as variation because of service source, can cause the discontinuous emission of channel power.We are called time of transmitting power on the channel and the ratio of channel occupancy time the activity factor of channel.
Owing to may take a plurality of transmission channels during a mobile phone users communication, so this user's professional normalization factor is the normalization factor sum of all channels.
2 couples of the present invention are described in further detail below in conjunction with accompanying drawing.
Set the load absolute door and be limited to T
Absolute, the load difference thresholding is T
Relative, switching number of retries is 3.In Fig. 2, mobile communication network equipment detects the load of each carrier cell A1, A2, B1, B2, C1, C2 when the load detecting timer expiry, is A1 by relatively determining the most heavily loaded frequency of load sub-district, and the underloading of load sub-district frequently is A2.The load of setting carrier cell A1 is greater than the absolute thresholding T of load
AbsoluteAnd the load difference of carrier cell A1 and carrier cell A2 is greater than load difference thresholding T
Relative, then mobile communication network equipment is determined load balance control is carried out in the load of carrier cell A1 and carrier cell A2.
Begin to switching the number of retries metering.
Mobile communication network equipment is chosen the mobile phone users that needs alien frequencies to switch in the mobile phone users that is in communications status of carrier cell A1, the mobile phone users of choosing must satisfy it and load on load maximum in the mobile phone users that is not more than (load of the load one carrier cell A2 of carrier cell A1)/2 loads, the mobile phone users of choosing needn't carry out different-frequency measure to inter-frequency neighboring cell A2, B2, C2, and the network equipment directly issues the direct-cut operation order and notifies the mobile phone users of choosing to switch among the alien-frequency district A2.
Mobile communication network equipment judges whether alien frequencies switches successful, if the alien frequencies handover success finishes this load balance control, the load detecting timer is resetted.If alien frequencies switches unsuccessful,, choose the mobile phone users that other alien frequencies switch again according to said method for the metering value of switching number of retries increases progressively.When the metering value of switching number of retries is 4, finish this load balance control, the load detecting timer is resetted.
Controlling load balance flow chart provided by the invention as shown in Figure 3.In Fig. 3, step 300 begins load balance control of the present invention.To step 310, the absolute thresholding of load is set, the load difference thresholding switches number of retries, and the load detecting timer resets.To step 320, detect the load detecting timer, to step 330, judge whether the load detecting timer is overtime, if not overtime,, continue to detect the load detecting timer to step 320.In step 330, if the load detecting timer expiry, to step 340, the load of each carrier cell of mobile communication network Equipment Inspection, and determine in each carrier cell the underloading in load the most heavily loaded frequency sub-district and load sub-district frequently.
To step 350, whether the load of judging the most heavily loaded frequency of load sub-district is greater than the absolute thresholding of load, if be not more than the absolute thresholding of load, the load that the most heavily loaded frequency of this load sub-district is described does not need to carry out load balance control, to step 395, the load detecting timer is resetted, to step 320.
In step 350, if, illustrating the load of the most heavily loaded frequency of this load sub-district greater than the absolute thresholding of load, the load of the most heavily loaded frequency of load sub-district reached the heavy degree of setting of load, the load of the most heavily loaded frequency of this load sub-district need be carried out load balance control.To step 360, whether the difference of judging the underloading load of sub-district frequently of the load of the most heavily loaded frequency of load sub-district and load is greater than the load difference thresholding, if this difference is not more than the load difference thresholding, then can not avoid because the phenomenon that the fluctuation in the load of carrier cell among a small circle causes the load between the different carrier frequency to adjust back and forth, therefore there is no need the mobile phone users of other carrier cells is switched in this carrier cell, to step 395, the load detecting timer is resetted, to step 320.
In step 360, if this difference is greater than the load difference thresholding, then the mobile phone users of other carrier cells can be switched in this carrier cell, to step 370, begin the load in the sub-district frequently of the underloading of, load the heaviest and carry out load balance control, begin to be the metering of load switching times the load of determining.
To step 380, determine that according to the load of the mobile phone users that is in communication state of above-mentioned introduction or the method for professional normalization factor needs carry out the mobile phone users that alien frequencies switches, to step 390, this mobile phone users of determining is carried out alien frequencies switch, it is switched to the underloading of load frequently in the sub-district.
To step 391, judge whether alien frequencies switches successful, if alien frequencies switches success, to step 392, the metering value of switching number of retries increases progressively 1, to step 393, judges that whether this metering value is greater than switching number of retries, if greater than switching number of retries, to step 394, this load balance control finishes, to step 395, the load detecting timer is resetted, to step 320.
In step 393,, to step 380, determine once more that according to the load of the mobile phone users that is in communication state of above-mentioned introduction or the method for professional normalization factor needs carry out other mobile phone users that alien frequencies switches if be not more than the switching number of retries.
In step 391, if the alien frequencies handover success, to step 394, this load balance control finishes, and to step 395, the load detecting timer is resetted, to step 320.
The present invention also provides a kind of device of control load balance, and as shown in Figure 4, this device comprises: load detecting module 410, determine control load balance module 420, load balance module 430.The function of load balance module 430 is by definite mobile phone users submodule 431, and alien frequencies switching submodule 432 realizes.
Load detecting module 410 regularly detects the load of each carrier cell according to the load detecting timer, and the load of detected each carrier cell transferred to determines control load balance module 420.
Determine that control load balance module 420 receives the load of each next carrier cell of load detecting module 410 transmission, and determine the underloading of load the most heavily loaded frequency sub-district and load sub-district frequently according to the load of each carrier cell, simultaneously according to the predetermined absolute thresholding of load and load difference thresholding determine the underloading of load the most heavily loaded frequency sub-district and load frequently the sub-district whether be the carrier cell that needs carry out load balance control, and notify and determine that mobile phone users submodule 431 need carry out the carrier cell of load balance control, beginning is to switch the number of retries metering.If detected load is the heaviest, the underloading of load does not need to carry out load balance control in the sub-district frequently, notification payload detection module 410 load detecting timers reset.
Determine that mobile phone users submodule 431 carries out in the carrier cell of load balance control at described needs, load or professional normalization factor according to the mobile phone users that is in communication state of above-mentioned introduction determine that needs carry out the mobile phone users that alien frequencies switches, and notice alien frequencies switching submodule 432 need be carried out the mobile phone users that alien frequencies switches.
The mobile phone users that the needs of 432 pairs of definite mobile phone users submodule 431 notices of alien frequencies switching submodule carry out the alien frequencies switching carries out the alien frequencies switching.When the switching of mobile phone users alien frequencies is unsuccessful, notice determines that the metering value of the switching number of retries in the control load balance module 420 increases progressively 1, determine that control load balance module 420 judges that the metering value is whether greater than switching number of retries, if, determine that control load balance module 420 notification payload detection modules 410 load detecting timers reset greater than switching number of retries.If be not more than the switching number of retries, determine that control load balance module 420 notice determines that mobile phone users submodule 431 carries out in the carrier cell of load balance control at described needs, determine once more that according to the load or the professional normalization factor of the mobile phone users that is in communication state of above-mentioned introduction other needs carry out the mobile phone users that alien frequencies switches.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, wishes that appended claim comprises these distortion and variation.
Claims (10)
1, a kind of controlling load balance is characterized in that comprising:
A, timing detect the load of each carrier cell;
B, determine the carrier cell of needs control load balance according to testing result;
C, the described carrier cell that needs the control load balance is carried out load balance control.
2, a kind of controlling load balance as claimed in claim 1 is characterized in that described step a comprises:
Regularly detect the load of each carrier cell according to the load detecting timer.
3, a kind of controlling load balance as claimed in claim 1 or 2 is characterized in that described step b comprises:
B1, according to the carrier cell of the light carrier cell of the load detecting result of described each carrier cell carrier cell that load is heavy and load as needs control load balance.
4, a kind of controlling load balance as claimed in claim 3 is characterized in that described step b1 comprises:
Determine the underloading of the heaviest and load of load sub-district frequently according to the load detecting result of described each carrier cell;
According to the absolute thresholding of predetermined load, predetermined load difference threshold judge the underloading of the heaviest and load of load frequently the sub-district whether be the carrier cell of needs control load balance;
If the difference of the load of the most heavily loaded frequency of load sub-district underloading load of sub-district frequently of the heaviest and load greater than the absolute thresholding of described predetermined load and load is greater than described predetermined load difference threshold, the underloading of the heaviest and load of described load sub-district frequently is the carrier cell that needs the control load balance;
Otherwise, the underloading of described load the most heavily loaded frequency sub-district and load frequently the sub-district for not needing the carrier cell of control load balance.
5, a kind of controlling load balance as claimed in claim 4 is characterized in that described step c comprises:
C1, begin be to switch the number of retries metering;
C2, need in the most heavily loaded frequency of the load sub-district to determine alien frequencies to switch to the underloading of the load mobile phone users in the sub-district frequently;
C3, described mobile phone users is carried out alien frequencies switch;
C4, judge that described alien frequencies switches whether success;
If the alien frequencies handover success finishes this load balance control, the load detecting timer resets;
If alien frequencies switches unsuccessful, the metering value of switching number of retries increases progressively, and judges that whether the metering value of switching number of retries is greater than switching number of retries;
If be not more than the switching number of retries, return step c2;
If greater than switching number of retries, finish this load balance control, the load detecting timer resets.
6, a kind of controlling load balance as claimed in claim 5 is characterized in that described step c2 comprises:
Obtain the load of the mobile phone users of each communication state in the most heavily loaded frequency of the load sub-district;
Obtain the underloading of the load of the most heavily loaded frequency of load sub-district and the load average of the load difference of sub-district frequently;
The mobile phone users that load is not more than load maximum in the mobile phone users of described average carries out the mobile phone users that alien frequencies switches as needs.
7, a kind of controlling load balance as claimed in claim 5 is characterized in that described step c2 comprises:
Obtain the professional normalization factor of the mobile phone users of each communication state in the most heavily loaded frequency of the load sub-district;
The mobile phone users that professional normalization factor is not more than professional normalization factor maximum in the mobile phone users of professional normalization factor thresholding carries out the mobile phone users that alien frequencies switches as needs.
8, a kind of controlling load balance as claimed in claim 7 is characterized in that the professional normalization factor K of described mobile phone users is:
K=10
(y-x)/10* p * R
Current business/ R
Benchmark service
Wherein: p is an activity factor; X is the desired value of benchmark service signal interference ratio; Y is the desired value of current business signal interference ratio; R
Current businessData rate for current business; R
Benchmark serviceData rate for benchmark service.
9, the device of control load balance in a kind of communication system is characterized in that comprising:
Load detecting module: regularly detect the load of each carrier cell, and the load of detected each carrier cell is transferred to definite control load balance module;
Determine the control load balance module: the load according to each next carrier cell of described load detecting module transmission determines that needs carry out the carrier cell of load balance control, and the described definite carrier cell of notification payload balance module need carry out load balance control;
The load balance module: the mobile phone users that according to the information of described definite control load balance module notice needs is carried out in the carrier cell of load balance control carries out load balance control.
10, the device of control load balance in a kind of communication system as claimed in claim 9 is characterized in that described load balance module comprises:
Determine the mobile phone users submodule: determine that described needs carry out the mobile phone users that needs to carry out the alien frequencies switching in the carrier cell of load balance control, and notice alien frequencies switching submodule need be carried out the mobile phone users that alien frequencies switches;
Alien frequencies switching submodule: the needs of described definite mobile phone users submodule notice are carried out mobile phone users that alien frequencies switches carry out alien frequencies and switch.
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| CNB031595294A CN100505939C (en) | 2003-09-17 | 2003-09-17 | Realization method and device for controlling load balance in communication system |
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| CNB031595294A CN100505939C (en) | 2003-09-17 | 2003-09-17 | Realization method and device for controlling load balance in communication system |
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