CN101146329A - Load control method between high-speed uplink packet access cells - Google Patents
Load control method between high-speed uplink packet access cells Download PDFInfo
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Abstract
The invention discloses a load control method between HSUPA cells. The method is to set frequency threshold for cells under load control for base station to send 'Down' commands and acquire the E-DCH Non-serving Relative Grant Down Commands common survey report from the cells; CRNC sends the frequency value of 'Down' commands to users in non-serving cells through the base station that acquires the common survey report, and judges whether the frequency value exceeds the frequency threshold. If so, CRNC will adjusts the neighboring cell's Target Non-serving E-DCH to Total E-DCH Power ratio parameters to reduce the dispatch of user terminal that takes the neighboring cell as serving cell. If not, CRNC will acquire the common survey report again. Therefore the method achieves coordination of resources between neighboring cells and effectively reduces the load of cell in this case.
Description
Technical field
The present invention relates to wireless communication field, particularly, relate to a kind of high speed uplink packet and insert (High Speed Uplink Packet Access, the HSUPA) duty control method of minizone.
Background technology
HSUPA is 3GPP (the 3rd Generation Partnership Project, the 3rd generation partner plan) a kind of new technology that in the R6 agreement, proposes for the throughput that improves system for uplink packet data, it has promoted power system capacity greatly, has satisfied the demand of user's high speed uplink business.
The HSUPA system can transship (promptly in the process of operation, the overload threshold that the up or downlink load of sub-district is provided with when surpassing the network planning), power system capacity is near the limit at this moment, and system is in an unsure state, and this just need take various load control measure to reduce system loading.The HSUPA cell load is presented as interference, reports that with public-measurement RTWP (Received Total Wideband Power, received total wideband power) value weighs usually.
Load control is that the load condition at a sub-district is that unit carries out with the sub-district.(Wideband Code Division Multiple Access WCDMA) in Release 99 systems, is by control radio network controller (Control RadioNetwork Controller, CRNC) control of loading in Wideband Code Division Multiple Access (WCDMA).In the HSUPA system, CRNC mainly controls load on macroscopic view, at first dispatch the control of loading fast by NODE B (base station), for example, by E-AGCH (E-DCH (EnhancedDedicated Channel, enhancement type special channel) Absolute Grant Channel, the E-DCH absolute grant channel) sends absolute grant to the user and reduce the maximum available resources of user, send relative authorization Down (downward modulation) order reduction macro diversity status user's interference by E-RGCH (E-DCH Relative Grant Channel, E-DCH relative authorization channel).For current area is the user of non-service cell, and Node B has only just can issue " Down " order by E-RGCH under the situation that satisfies following two formula at the same time:
Experienced Total RTWP (current total RTWP)〉Maximum TargetRTWP signalled from CRNC (RTWP maximum target value (from CRNC))
Non-serving E-DCH to Total E-DCH Power ratio (non-service E-DCH with total E-DCH power ratio)〉Target Non-serving E-DCH to Total E-DCHPower ratio signalled from CRNC (non-service E-DCH with total E-DCH target power than (from CRNC))
Need the received power ratio of maximum available RTWP and non-service E-DCH and total E-DCH of reference when wherein, Maximum Target RTWP and Target Non-serving E-DCH to TotalE-DCH Power ratio represent the E-DCH scheduling respectively.
Based on the characteristics of HSUPA up link, area interference RTWP is not only produced by this community user, and the adjacent area user also can bring interference to this sub-district.Therefore when NODE B loads control,, might not reach the purpose of load control if only take to reduce the strategy that this sub-district may command is disturbed.If the load of overloaded cells is mainly introduced by adjacent community user, to the adjacent sub-district obviously science more of control of loading.Because the sub-district, adjacent area may belong to different NODE B, the load control that then triggers after the cell-overload adjacent sub-district must need CRNC to get involved.
Increased E-DCH Non-servingRelative Grant Down Commands (non-service E-DCH relative authorization down command) public-measurement report in the TS25.433 agreement newly in March, 2006, it is the frequency that the user of non-service cell issues " Down " order to current area that CRNC obtains NODE B by this public-measurement.
HSUPA minizone duty control method basic principle based on this sub-district E-DCH Non-serving Relative Grant DownCommands public-measurement report control neighboring cell load is:
1) be the non-service cell of UE (User Equipment, subscriber equipment) for this sub-district under the grand diversity condition, NODE B satisfies under the situation of following two conditions at the same time can send " Down " order to UE:
Experienced?Total?RTWP>Maximum?Target?RTWP?signalledfrom?CRNC
Non-serving?E-DCH?to?Total?E-DCH?Power?ratio>Target?ratiosignalled?from?CRNC
As can be seen, this moment, the load of NODE B was higher, and main load is to be caused by the user who is non-service cell with this sub-district.
2) CRNC obtains the frequency that NODE B sends " Down " order by the public-measurement report of E-DCH Non-serving Relative Grant DownCommands, thereby knows the load condition of sub-district.
3) order is more frequent if NODE B issues " Down ", has surpassed a default thresholding, can think that then NODE B by dispatching the load that can not control this sub-district, need give CRNC with the load disposal right.
4) in a single day CRNC finds that NODE B can not be by its load of scheduling controlling, and then CRNC takes over the processing of load.
5) there are two kinds of methods can reduce the frequency that NODE B issues " Down " order based on above-mentioned condition, thereby allow NODE B regain the load control:
A kind of method is to reduce the Total RTWP of this sub-district by CRNC load control strategy (for example, cutting the user by force to alien frequencies adjacent area even call drop etc.).But, do like this and just run counter to the original meaning that agreement works up the report of this public-measurement, because this moment, the overload of Total RTWP was that user by non-service cell causes, reduce the TotalRTWP of this community user, thereby reduce QoS (the Quality of Service of this community user, service quality) obviously also unreasonable, make fairness too poor.
Another kind method is by the raise TargetNon-serving E-DCH to Total E-DCH Power ratio of this sub-district of Physical Shared Channel reprovision (PHYSICAL SHAREDCHANNEL RECONFIGURATION) flow process.But, do like this and just improved the scheduling of non-service cell user in this sub-district, not only can not reduce the Total RTWP of this sub-district, and allow the user of this sub-district obtain worse service, obviously also inadvisable.
Therefore, need the method for a kind of minizone load control, trigger CRNC control neighboring cell load,, and effectively reduce the load of this sub-district, utilize Radio Resource as far as possible fully with the resource allocation between the realization neighbor cell based on the public-measurement report of this sub-district.
Summary of the invention
Main purpose of the present invention is to provide the method for a kind of HSUPA minizone load control, be used to overcome since the limitation of prior art and defective cause only be difficult to effectively realize the problem that load is controlled by control that this community user is loaded.
To achieve these goals, the invention provides duty control method between a kind of high speed uplink packet access cell.Duty control method may further comprise the steps:
Step S102, the cell setting base station of controlling loading sends the frequency threshold of down command;
Step S104, the public-measurement report of obtaining the non-service E-DCH relative authorization down command of sub-district;
Step S106, the control radio network controller obtains the base station sends frequency values from down command to the user terminal that with the sub-district is non-service cell by the public-measurement report, and determination frequency value overfrequency threshold value whether, if surpass, then proceed to step S108, if do not surpass, then proceed to step S104; And
Step S108, the non-service E-DCH that adjusts adjacent cells of cells and total E-DCH target power be than parameter, with minimizing to of the scheduling of adjacent sub-district as the user terminal of Serving cell.
The base station can be current total RTWP to the condition that the user terminal that with the sub-district is non-service cell sends down command〉from the RTWP maximum target value of control radio network controller, and non-service E-DCH and total E-DCH power ratio from the non-service E-DCH and total E-DCH target power ratio of control radio network controller.The control radio network controller can be provided with RTWP maximum target value and non-service E-DCH and total E-DCH target power ratio for the base station.
Preferably, step S102 also comprises the maximum adjustable scope that non-service E-DCH and total E-DCH target power ratio are set.In step S108, adjust non-service E-DCH and total E-DCH target power than after the parameter, the control radio network controller judges that the base station is to the frequency values overfrequency threshold value whether that with the sub-district is the user terminal transmission down command of non-service cell, if also surpass, then non-service E-DCH and total E-DCH target power than the situation that does not reach the maximum adjustable scope under, further adjust non-service E-DCH and compare parameter with total E-DCH target power.
Preferably, before step S108, judge in the adjacent sub-district whether transship with the load of adjacent sub-district as the user terminal of Serving cell, if overload, the RTWP that falls that then carries out adjacent sub-district self operates, and proceeds to step S106 then, if nonoverload, then execution in step S108.
In step S108, adjust non-service E-DCH and can comprise step-length of parameter adjustment increase than parameter with total E-DCH target power.
Can obtain the maximum adjustable scope of the frequency threshold of down command and non-service E-DCH and total E-DCH target power ratio by emulation or actual measurement.
Alternatively, if the situation of the control that occurs in a period of time loading, the control radio network controller is reconfigured as default value with total E-DCH target power than parameter with the non-service E-DCH of adjacent sub-district.
By technique scheme, the present invention realized the resource allocation between neighbor cell, and algorithm is simple by the rational method of the newly-increased E-DCHNon-serving Relative Grant Down Commands public-measurement report of use agreement, is convenient to realize.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart that illustrates according to the duty control method of HSUPA of the present invention minizone;
Fig. 2 is the block diagram that illustrates according to the load control system of HSUPA of the present invention minizone;
Fig. 3 is the overview flow chart that illustrates according to the duty control method of the embodiment of the invention; And
Fig. 4 is the specific implementation flow chart that illustrates according to the duty control method of the embodiment of the invention.
Embodiment
Describe the present invention below with reference to the accompanying drawings in detail.
Fig. 1 is the flow chart that illustrates according to the duty control method of HSUPA of the present invention minizone.
In step S102, the cell setting base station of the control of loading is sent the frequency threshold of " Down " order.
Can obtain the frequency threshold of " Down " order by emulation or actual measurement.
The base station to the condition that the user terminal that with the sub-district is non-service cell sends " Down " order is: Experienced Total RTWP〉Maximum Target RTWP signalledfrom CRNC, and Non-serving E-DCH to Total E-DCH Power ratio Target ratio signalled from CRNC.The control radio network controller is that the base station is provided with Maximum Target RTWP and Target Non-serving E-DCH to Total E-DCHPower ratio.
Next, in step S104, obtain the public-measurement report of the E-DCH Non-servingRelative Grant Down Commands of sub-district.
Then, in step S106, the control radio network controller obtains the base station sends frequency values from " Down " order to the user terminal that with the sub-district is non-service cell by the public-measurement report, and determination frequency value overfrequency threshold value whether, if surpass, then proceed to step S108,, then proceed to step S104 if do not surpass.
At last, in step S108, adjust the Target Non-servingE-DCH to Total E-DCH Power ratio parameter of adjacent cells of cells, to reduce with of the scheduling of adjacent sub-district as the user terminal of Serving cell.
Alternatively, before step S108, judge in the adjacent sub-district whether transship with the load of adjacent sub-district as the user terminal of Serving cell, if overload, the RTWP that falls that then carries out adjacent sub-district self operates, and proceeds to step S106 then, if nonoverload, then execution in step S108.
Alternatively, in step S102, the maximum adjustable scope of Target Non-serving E-DCH to TotalE-DCH Power ratio is set, can obtains by emulation or actual measurement.In step S108, after adjusting Target Non-serving E-DCH to Total E-DCHPower ratio parameter, the control radio network controller judges that the base station sends whether overfrequency threshold value of frequency values that " Down " order to the user terminal that with the sub-district is non-service cell, if also surpass, then do not reach under the situation of maximum adjustable scope, further adjust TargetNon-serving E-DCH to Total E-DCH Power ratio parameter at Target Non-serving E-DCH to Total E-DCHPower ratio.
Preferably, in step S108, adjust Target Non-serving E-DCH to TotalE-DCH Power ratio parameter and comprise step-length of parameter adjustment increase.
Alternatively, if the situation of the control that occurs in a period of time loading, the control radio network controller is reconfigured as default value with the Target Non-serving E-DCH to TotalE-DCH Power ratio parameter of adjacent sub-district.
Fig. 2 illustrates the load control system 10 of employing according to the duty control method of HSUPA of the present invention minizone.
Alternatively, before adjusting module 26 is adjusted Target Non-serving E-DCH to TotalE-DCH Power ratio parameter, judge in the adjacent sub-district whether transship with the load of adjacent sub-district as the user terminal of Serving cell, if nonoverload, then adjust Target Non-servingE-DCH to Total E-DCH Power ratio parameter, if overload, the RTWP that falls that then carries out adjacent sub-district self operates.
Alternatively, after adjusting module 26 is adjusted Target Non-serving E-DCH to TotalE-DCH Power ratio parameter, judge whether overfrequency threshold value of frequency values that the base station sends from " Down " order to the user terminal that with the sub-district is non-service cell, if surpass, then do not reach under the situation of maximum adjustable scope, further adjust Target Non-serving E-DCH toTotal E-DCH Power ratio parameter at Target Non-serving E-DCH to Total E-DCH Power ratio.
Preferably, adjusting module 26 adjustment Target Non-serving E-DCH to TotalE-DCH Power ratio parameters comprise step-length of parameter adjustment increase.
HSUPA minizone duty control method basic principle based on this sub-district E-DCH Non-serving Relative Grant DownCommands public-measurement report control neighboring cell load is:
1) be the non-service cell of UE for this sub-district under the grand diversity condition, NODE B satisfies under the situation of following two conditions at the same time can send " Down " order to UE: Experienced Total RTWP〉Maximum Target RTWP signalled
Non-serving?E-DCH?to?Total?E-DCH?Power?ratio>Target?ratiosignalled?from?CRNC
As can be seen, this moment, the load of NODE B was higher, and main load is to be caused by the user who is non-service cell with this sub-district.
2) CRNC obtains the frequency that NODE B sends " Down " order by the public-measurement report of E-DCH Non-serving Relative Grant DownCommands, thereby knows the load condition of sub-district.
3) order is more frequent if NODE B issues " Down ", has surpassed a default thresholding, can think that then NODE B by dispatching the load that can not control this sub-district, need give CRNC with the load disposal right.
4) in a single day CRNC finds that NODE B can not be by its load of scheduling controlling, and then CRNC takes over the processing of load.
In fact, because this moment this overloaded cells mainly be since Serving cell in the adjacent area of this sub-district and the UE that is in macro diversity status cause, so the most effective processing mode is CRNC realizes the minizone by the load control strategy of being correlated with a resource allocation, reduce in the adjacent area of this overloaded cells with the load of this adjacent area, the RTWP of this sub-district is promoted thereby reduce adjacent sub-district as that a part of user of Serving cell.Not only can reduce the Non-serving E-DCH to Total E-DCH Power ratio of this sub-district like this, and can reduce the Total RTWP of this sub-district, make NODE B regain the quick load control.Simultaneously, iff being to (for example taking traditional CRNC load down means as the user of Serving cell with this adjacent area, delete grand diversity link), characteristic based on uplink channel interference, might promote the RTWP of this sub-district more, adjust so the mode of science should be the Target Non-serving E-DCH to Total E-DCH Power ratio to the adjacent area, thereby the scheduling by NODE B reduces Serving cell in the adjacent area and be in the load of the UE of macro diversity status.
Fig. 3 is the overview flow chart that illustrates according to the duty control method of the embodiment of the invention.
In step S302, to system initialization, and configuration dependent threshold parameter; In step S304, judge whether E-DCH Non-serving Relative Grant DownCommands public-measurement report value surpasses NODE B and send " Down " order frequency threshold.
If determine that in step S304 E-DCH Non-serving Relative GrantDown Commands public-measurement report value surpasses NODE B and sends " Down " order frequency threshold, then in step S306, adjust the configuration of adjacent area Target Non-serving E-DCH toTotal E-DCH Power ratio parameter, reducing with the scheduling as the user of Serving cell of the adjacent area of overloaded cells, to reduce that such customer charge promptly reduces with the overloaded cells be the customer charge purpose of non-service cell thereby reach.
If determine that in step S304 E-DCH Non-serving Relative GrantDown Commands public-measurement report value does not surpass NODE B and sends " Down " order frequency threshold, then return execution in step S304.
Fig. 4 is the specific implementation flow chart that illustrates according to the duty control method of the embodiment of the invention.
In step S402, for default each the sub-district NODE B of CRNC sends " Down " order frequency threshold and Ratio maximum adjustable scope, these values can be tested by emulation or real system and be obtained.
In step S404, CRNC is provided with the Target Non-serving E-DCH to Total E-DCH Power ratio and the Maximum Target RTWP of scheduling usefulness for NODE B by Physical Shared Channel reprovision flow process.
Next, in step S406, CRNC monitors E-DCH Non-servingRelative Grant Down Commands public-measurement report value, judges whether to surpass default NODE B and sends " Down " order frequency threshold.If in step S406, determine E-DCH Non-serving Relative Grant Down Commands public-measurement report value overfrequency thresholding, then execution in step S408.Otherwise continue execution in step S406 policer operation.
Then, in step S408, CRNC judges whether the adjacent area of overloaded cells transships with the load of this adjacent area as that a part of user of Serving cell.
If in step S408, determine adjacent area uplink load overload, then execution in step S410.In step S410, for guaranteeing adjacent area safety, the RTWP that falls that at first carries out adjacent area self operates, and returns step S406 then.
If in step S408, determine adjacent area uplink load nonoverload, then proceed to step S412.In step S412, CRNC is by carrying out the configuration that Physical Shared Channel reprovision flow process is adjusted overloaded cells adjacent area Target Non-serving E-DCH to Total E-DCHPower ratio parameter to the adjacent area, this parameter adjustment is increased a step-length, scheduling by NODEB reaches minimizing with the adjacent area of the overloaded cells load as the user of Serving cell, thereby reaches the purpose that reduces the overloaded cells load.
Next, in step S414, CRNC monitors whether the public-measurement report value still surpasses order transmission frequency thresholding next time.If still surpass the transmission frequency thresholding, then proceed to the judgement of step S416 adjusting range, carry out public-measurement report supervisory work otherwise turn back to step S406.
In step S416, CRNC judges whether this adjacent area Target Non-serving E-DCHto Total E-DCH Power ratio has adjusted to default maximum.If reach maximum, then proceed to step S418, otherwise turn back to step S412.
At last, in step S418, this programme adjustment finishes, and RNC carries out other operation.
Should be noted that, follow-up in order to guarantee the stability of the network planning, after minizone load control is finished in one section lag time, if do not continue to occur carrying out the situation of minizone load control, CRNC can be made into default value with adjacent area TargetNon-serving E-DCH to Total E-DCH Power ratio parameter again by Physical Shared Channel reprovision flow process.
The newly-increased E-DCH Non-serving Relative Grant DownCommands public-measurement report of use agreement of the present invention by the CRNC control of loading, has realized the resource allocation between neighbor cell, effectively reduces the load of this sub-district.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.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 (10)
1. the duty control method between a high speed uplink packet access cell is characterized in that, may further comprise the steps:
Step S102, the cell setting base station of controlling loading sends the frequency threshold of down command;
Step S104, the public-measurement report of obtaining the non-service E-DCH relative authorization down command of described sub-district;
Step S106, the control radio network controller obtains described base station sends frequency values from down command to the user terminal that with described sub-district is non-service cell by described public-measurement report, and judge whether described frequency values surpasses described frequency threshold, if surpass, then proceed to step S108, if do not surpass, then proceed to step S104;
Step S108, the non-service E-DCH that adjusts described adjacent cells of cells and total E-DCH target power be than parameter, to reduce with the scheduling of described adjacent sub-district as the user terminal of Serving cell.
2. duty control method according to claim 1, it is characterized in that, described base station to the condition that the user terminal that with described sub-district is non-service cell sends down command is: current total RTWP＞from the RTWP maximum target value of control radio network controller, and non-service E-DCH and total E-DCH power ratio＞and from the non-service E-DCH and total E-DCH target power ratio of control radio network controller.
3. duty control method according to claim 2 is characterized in that, described control radio network controller is that described base station is provided with RTWP maximum target value and non-service E-DCH and total E-DCH target power ratio.
4. duty control method according to claim 1 is characterized in that, step S102 also comprises the maximum adjustable scope that described non-service E-DCH and total E-DCH target power ratio are set.
5. duty control method according to claim 1, it is characterized in that, before step S108, judge in the described adjacent sub-district whether transship with the load of described adjacent sub-district as the user terminal of Serving cell, if overload, the RTWP that falls that then carries out described adjacent sub-district self operates, and proceeds to step S106 then, if nonoverload, then execution in step S108.
6. duty control method according to claim 4, it is characterized in that, among the step S108, adjust described non-service E-DCH and total E-DCH target power than after the parameter, described control radio network controller judges whether described base station surpasses described frequency threshold to the frequency values that the user terminal that with described sub-district is non-service cell sends down command, if also surpass, then described non-service E-DCH and total E-DCH target power than the situation that does not reach described maximum adjustable scope under, further adjust described non-service E-DCH and compare parameter with total E-DCH target power.
7. according to each described duty control method in the claim 1,5 and 6, it is characterized in that, among the step S108, adjust described non-service E-DCH and comprise step-length of described parameter adjustment increase than parameter with total E-DCH target power.
8. duty control method according to claim 1 is characterized in that, obtains the frequency threshold of described down command by emulation or actual measurement.
9. duty control method according to claim 4 is characterized in that, obtains the maximum adjustable scope of described non-service E-DCH and total E-DCH target power ratio by emulation or actual measurement.
10. duty control method according to claim 1, it is characterized in that, the situation of control if occur in a period of time loading, described control radio network controller is reconfigured as default value with total E-DCH target power than parameter with the non-service E-DCH of described adjacent sub-district.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101765141B (en) * | 2008-12-23 | 2012-12-19 | 中兴通讯股份有限公司 | Method for coordinating interferences among HSUPA substricts in TD - SCDMA system |
| CN103052133A (en) * | 2011-10-14 | 2013-04-17 | 华为技术有限公司 | Method and device for improving system capacity |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101765141B (en) * | 2008-12-23 | 2012-12-19 | 中兴通讯股份有限公司 | Method for coordinating interferences among HSUPA substricts in TD - SCDMA system |
| CN103052133A (en) * | 2011-10-14 | 2013-04-17 | 华为技术有限公司 | Method and device for improving system capacity |
| CN103052133B (en) * | 2011-10-14 | 2015-03-18 | 华为技术有限公司 | Method and device for improving system capacity |
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