CN102740364A - Load balancing method and device - Google Patents
Load balancing method and device Download PDFInfo
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- CN102740364A CN102740364A CN2012102080444A CN201210208044A CN102740364A CN 102740364 A CN102740364 A CN 102740364A CN 2012102080444 A CN2012102080444 A CN 2012102080444A CN 201210208044 A CN201210208044 A CN 201210208044A CN 102740364 A CN102740364 A CN 102740364A
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Abstract
The invention discloses a load balancing method and a load balancing device. The method comprises the following steps of: acquiring average load of a cell in a preset balancing period; judging whether the average load is greater than a difference value between load balancing threshold and load balancing delaying quantity, if the average load is greater than the difference value, continuously judging whether the cell and neighboring cells meet a preset load balancing execution condition; and under the condition that the cell and the neighboring cells meet the preset load balancing execution condition, balancing user equipment (UE) which meets a preset candidate condition in all pieces of UE in the cell to target cells in the neighboring cells. By the method and the device, effects of improving the reliability, timeliness and convergence of load balancing can be achieved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of load equalization method and device.
Background technology
LTE (Long-Term Evolution; Long Term Evolution) resource of sub-district is limited in the communication system, and along with the increase of number of users and professional number, the load of sub-district can increase gradually; And the increase of cell load can influence the index performance of customer service; If can not reduce the load of sub-district timely and effectively, when the load of system is increased to the warning line of system, will causes the rapid variation of performance of system even cause system crash; Simultaneously, because Load distribution is uneven, for the heavy load sub-district, its resource that has scarcity relatively causes quality of services for users to can not get abundant guarantee easily, for the underload sub-district, but has the situation of the wasting of resources.Thus, introduced the load balancing technology.The effect of load balancing is exactly through the load of real-time monitoring current area and obtains the adjacent area cell load, and then adopts load sharing mechanism to prevent that the individual cells load is too high.The minizone of taking load equalization method that load is associated on the geographical position is evenly distributed as much as possible; Reduce concentrations in load certain sub-district in the zone; Thereby improve the entire system performance effectively; The fail safe of raising system, stability and capacity, the system that makes reaches the state of a total optimization.
In load equalization method,, then carry out the periodicity X2 interface and measure eNodeB (base station) start-up period property load balancing timer if the load balancing function enables.In the time of the load balancing timer expiry, judge load condition, and from the sub-district, select candidate UE (User Equipment, subscriber equipment) to force to be balanced to Target cell.
But there is following problem in present load balancing: 1, unnecessary X2 measures, and has increased the X2 interface burden, when this cell load is light, need not carry out load balancing; 2, balanced UE selects not optimize, and causes UE is balanced to that the load of this sub-district can't lower very soon behind the Target cell, perhaps UE is balanced to Target cell after service quality can not get guaranteeing that perhaps to be in frequent table tennis balanced for UE; 3, adopt to force balancedly, do not consider the coverage condition of Target cell and this sub-district, possibly occur the Target cell signal very a little less than, perhaps do not have Target cell signal covering etc., balanced poor reliability.
Summary of the invention
The invention provides a kind of load equalization method and device, one of to address the above problem at least.
According to an aspect of the present invention, a kind of load equalization method is provided, has comprised: obtained the average load of this sub-district in the predetermined balanced cycle; Judge that average load whether greater than the difference between load balancing thresholding and the load balancing amount of hysteresis, is under the situation that is in judged result, continue to judge whether this sub-district and this adjacent cells of cells satisfy predetermined load balancing executive condition; Continuing judged result is under the situation that is, the UE that satisfies predetermined candidate's condition in all user equipment (UE)s under this sub-district is balanced to the Target cell in the adjacent sub-district.
Preferably, obtain the average load of this sub-district in the predetermined balanced cycle, comprising: the resource operating position of this sub-district is sampled according to the sampling period; In the balanced cycle, receive a plurality of information on loads, wherein, the sampled result that each information on load obtains after for each sampling period is interior the resource operating position of this sub-district being sampled; A plurality of information on loads are averaged calculating, obtain average load.
Preferably, continue to judge whether this sub-district and this adjacent cells of cells satisfy the load balancing executive condition of being scheduled to, and comprising: obtain this sub-district and the adjacent sub-district mutual interactive information of loading, wherein, comprise the load of adjacent sub-district in the exchange message; Continue to judge whether this sub-district and adjacent sub-district satisfy the load balancing executive condition according to interactive information.
Preferably, the UE that satisfies predetermined candidate's condition in all user equipment (UE)s under this sub-district is balanced in the Target cell in the adjacent sub-district, comprises: the load balancing measurement configuration parameter that gets access to is sent to the UE that satisfies candidate's condition; What reception satisfied that the UE of candidate's condition reports carries out the load balancing measurement report that obtains after load balancing is measured according to load balancing measurement configuration parameter to adjacent sub-district, wherein, carries the measurement result information of adjacent sub-district in the load balancing measurement report; Measurement result information according to the load of the load of the UE that satisfies candidate's condition, adjacent sub-district and adjacent sub-district is confirmed Target cell from adjacent sub-district, and the UE that will satisfy candidate's condition is balanced to Target cell.
Preferably, the load balancing executive condition comprises: the load of adjacent sub-district surpasses predetermined load balancing execution thresholding less than the load of this sub-district and the load of this sub-district.
Preferably, candidate's condition comprises: do not have emergence call service, be not in load balancing incision guard mode and support different-frequency measure and the alien frequencies switching.
Preferably, after the UE that in all user equipment (UE)s under this sub-district, satisfies predetermined candidate's condition was balanced to the Target cell in the adjacent sub-district, this method also comprised: judge average load whether less than load balancing thresholding and load balancing amount of hysteresis and value; Average load less than with the situation of value under, finishes the current load balancing state that load balancing is operated that carries out, otherwise, keep and meet equilibrium state.
According to a further aspect in the invention, a kind of load balancing device is provided, has been positioned at evolved base station (eNodeB), having comprised: acquisition module is used to obtain the average load of this sub-district in the predetermined balanced cycle; First judge module; Be used to judge that whether average load is greater than the difference between load balancing thresholding and the load balancing amount of hysteresis; In judged result is under the situation that is, continues to judge whether this sub-district and this adjacent cells of cells satisfy predetermined load balancing executive condition; Balance module, the continuation judged result that is used at determination module is under the situation that is, the UE that satisfies predetermined candidate's condition in all user equipment (UE)s under this sub-district is balanced to the Target cell in the adjacent sub-district.
Preferably, acquisition module comprises: sampling unit is used for according to the sampling period resource operating position of this sub-district being sampled; First receiving element is used in the balanced cycle, receiving a plurality of information on loads, wherein, and the sampled result that each information on load obtains after for each sampling period is interior the resource operating position of this sub-district being sampled; Computing unit is used for a plurality of information on loads are averaged calculating, obtains average load.
Preferably, first judge module comprises: acquiring unit, be used to obtain this sub-district and the adjacent sub-district mutual interactive information of loading, and wherein, comprise the load of adjacent sub-district in the exchange message; Judging unit is used for continuing to judge whether this sub-district and adjacent sub-district satisfy the load balancing executive condition according to interactive information.
Preferably, balance module comprises: transmitting element is used for the load balancing measurement configuration parameter that gets access to is sent to the UE that satisfies candidate's condition; Second receiving element; Be used to receive that the UE that satisfies candidate's condition reports adjacent sub-district is carried out the load balancing measurement report that obtains after load balancing is measured according to load balancing measurement configuration parameter; Wherein, carry the measurement result information of adjacent sub-district in the load balancing measurement report; Balanced unit is used for confirming Target cell from adjacent sub-district according to the measurement result information of load and the adjacent sub-district of satisfying the load of the UE of candidate's condition, adjacent sub-district, and the UE that will satisfy candidate's condition is balanced to Target cell.
Preferably, the load balancing executive condition comprises: the load of adjacent sub-district surpasses predetermined load balancing execution thresholding less than the load of this sub-district and the load of this sub-district.
Preferably, candidate's condition comprises: do not have emergence call service, be not in load balancing incision guard mode and support different-frequency measure and the alien frequencies switching.
Preferably, this device also comprises: second judge module, be used to judge average load whether less than load balancing thresholding and load balancing amount of hysteresis and value; Processing module, be used for second judge module judge average load less than with the situation of value under, finish the current load balancing state that load balancing is operated that carries out, otherwise, keep and meet equilibrium state.
Through the present invention; Adopt to introduce the load balancing amount of hysteresis, when the average load of judging this sub-district is greater than the difference between load balancing thresholding and the load balancing amount of hysteresis, definite mode that load balancing is carried out in this sub-district and adjacent sub-district; The unnecessary X2 measurement that prior art produces, the problem that balanced UE selection is not optimized, equilibrium is forced in necessary employing have been solved; Reduce the ping-pong that the X2 interface load has avoided X2 to measure simultaneously, simultaneously, considered the base priority of UE; Guarantee the experience of high-priority users, thereby reached reliability, ageing, the constringent effect that improves load balancing.
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 load equalization method flow chart according to the embodiment of the invention;
Fig. 2 is the overall process flow figure of load balancing according to the preferred embodiment of the invention;
Fig. 3 is a load balancing processing method sketch map between the base station according to the preferred embodiment of the invention;
Fig. 4 is a base station internal loading equalization processing method sketch map according to the preferred embodiment of the invention;
Fig. 5 is that load balancing stops process chart according to the preferred embodiment of the invention;
Fig. 6 is that load balancing X2 measures startup processing method sketch map according to the preferred embodiment of the invention;
Fig. 7 is that load balancing X2 measures the stop treatment method sketch map according to the preferred embodiment of the invention;
Fig. 8 is a load balancing cycle timer timeout treatment flow chart according to the preferred embodiment of the invention;
Fig. 9 is a load balancing flowchart according to the preferred embodiment of the invention;
Figure 10 is the structured flowchart according to the load balancing device of the embodiment of the invention; And
Figure 11 is the structured flowchart of load balancing device according to the preferred embodiment of the invention.
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
Fig. 1 is the load equalization method flow chart according to the embodiment of the invention, and is as shown in Figure 1, and this method mainly may further comprise the steps (step S102-step S106).
Step S102 obtains the average load of this sub-district in the predetermined balanced cycle.
Step S104 judges that average load whether greater than the difference between load balancing thresholding and the load balancing amount of hysteresis, is under the situation that is in judged result, continues to judge whether this sub-district and this adjacent cells of cells satisfy predetermined load balancing executive condition.
Step S106 is under the situation that is continuing judged result, and the UE that satisfies predetermined candidate's condition in all user equipment (UE)s under this sub-district is balanced to the Target cell in the adjacent sub-district.
In the step S102 of present embodiment, when obtaining the average load of this sub-district in the predetermined balanced cycle, can realize: the resource operating position of this sub-district is sampled according to the sampling period through such mode; In the balanced cycle, receive a plurality of information on loads, wherein, the sampled result that each information on load obtains after for each sampling period is interior the resource operating position of this sub-district being sampled; A plurality of information on loads are averaged calculating, obtain average load.
In the step S104 of present embodiment, when continuing to judge whether this sub-district satisfies the load balancing executive condition of being scheduled to this adjacent cells of cells, can realize: obtain this sub-district and the adjacent sub-district mutual interactive information of loading through such mode; Continue to judge whether this sub-district and adjacent sub-district satisfy the load balancing executive condition according to interactive information.
In the present embodiment, step S106 can implement like this: the load balancing measurement configuration parameter that gets access to is sent to the UE that satisfies candidate's condition; What reception satisfied that the UE of candidate's condition reports carries out the load balancing measurement report that obtains after load balancing is measured according to load balancing measurement configuration parameter to adjacent sub-district, wherein, carries the measurement result information of adjacent sub-district in the load balancing measurement report; Measurement result information according to the load of the load of the UE that satisfies candidate's condition, adjacent sub-district and adjacent sub-district is confirmed Target cell from adjacent sub-district, and the UE that will satisfy candidate's condition is balanced to Target cell.
In the present embodiment, the load balancing executive condition can comprise: the load of adjacent sub-district surpasses predetermined load balancing execution thresholding less than the load of this sub-district and the load of this sub-district.
In the present embodiment, candidate's condition can comprise: do not have emergence call service, be not in load balancing incision guard mode and support different-frequency measure and the alien frequencies switching.Certainly, in practical application, candidate's condition can adjust accordingly according to the actual requirements, does not limit to this.
Preferably, after the step S104 of present embodiment, can also judge average load whether less than load balancing thresholding and load balancing amount of hysteresis and value; Average load less than with the situation of value under, finishes the current load balancing state that load balancing is operated that carries out, otherwise, keep and meet equilibrium state.
For the load equalization method of this instance, in practical application, can realize in the following manner.
(1) obtaining of parameter can (for example, be obtained the load balancing parameter of configuration in OMC), obtain all adjacent areas of this sub-district again from webmaster from webmaster.
(2) carry out the measurement of MAC resource, eNodeB is with sampling period T
SampleThe resource operating position of each UE and with cycle T under sampling plot and the sub-district
ReportReport the average load information behind the sample mean.
(3) the dynamic start and stop of load balancing, if the load balancing function of sub-district enables, eNodeB adds up T continuously
LoadB/ T
SampleThe mean value of inferior cell load, whether the average load situation decision according to the sub-district starts the load balancing function then.If the load balancing function is not activated and the average load of sub-district starts thresholding Threshold greater than load balancing
LoadStartWith load balancing amount of hysteresis Hyst
LoadPoor, then start the load balancing function, promptly start-up period is T
LoadBLoad balancing cycle timer and load balancing X2 measure.If being lower than load balancing, load balancing function on but the average load of sub-district start thresholding and load balancing amount of hysteresis Hyst
LoadSum then stops load balancing, and promptly stop load balancing cycle timer and X2 and measure, other, it is constant then to keep the load balancing state.
(4) carry out load balancing X2 and measure, eNodeB obtains all adjacent areas of this sub-district from the neighbor cell configuration module of webmaster, obtains the load balancing parameter of each adjacent area from the parameter configuration module of webmaster.The adjacent sub-district that the load balancing function is enabled is divided into some measurement groups by the base station of ownership and measures.
(5) load balancing cycle timer timeout treatment, eNodeB judges whether to satisfy the load balancing executive condition according to the load of this sub-district and all adjacent sub-districts.If satisfy; Then select the candidate UE that satisfies certain condition of some to issue the load balancing measurement configuration, and delete that a load balancing cycle has issued the load balancing measurement configuration but the load balancing measurement configuration that do not report load balancing measurement report UE according to criterion.If do not satisfy, delete then that a load balancing cycle has issued the load balancing measurement configuration but the load balancing measurement configuration that do not report load balancing measurement report UE.
(6) load balancing is carried out; After eNodeB receives the load balancing measurement report that UE reports; The load of the adjacent sub-district of carrying in the corresponding load balancing measurement report that obtains mutually according to the load of this UE with through the X2 oral sex judges whether UE is balanced to this Target cell by certain criterion.If it is satisfy condition, then balanced to Target cell.
Below in conjunction with Fig. 2 to Fig. 9 and preferred embodiment above-mentioned load equalization method is described in detail.
Fig. 2 is the overall process flow figure of load balancing according to the preferred embodiment of the invention, and is as shown in Figure 2, and this flow process mainly may further comprise the steps (step S202-step S210).
Step S202, sub-district are in normal condition, and eNodeB adds up T continuously
LoadB/ T
SampleThe mean value of the cell load that inferior MAC resource measurement module reports, load balancing is not activated if the cell load equalization function enables, and the average load of sub-district starts the poor of thresholding and load balancing amount of hysteresis greater than load balancing, then goes to step S204; Otherwise, return.
Step S204, startup load balancing cycle timer go to step S206.
Step S206, tissue are also initiated load balancing X2 and are measured, and go to step S208.
Step S208, to handle the load balancing cycle timer overtime, at first, judges whether to satisfy the load balancing executive condition according to the load of this sub-district and adjacent sub-district according to criterion; Secondly,, then select the balanced UE of candidate and issue the load balancing measurement configuration, go to step S210 according to criterion if satisfy the load balancing executive condition.
Step S210, load balancing carry out and handle, and eNodeB is from load balancing measurement report select target sub-district that UE reports; Judging whether according to criterion then can be balanced to Target cell, if can, then that UE is balanced to Target cell through switching.
Fig. 3 is a load balancing processing method sketch map between the base station according to the preferred embodiment of the invention, and as shown in Figure 3, this method may further comprise the steps (step S302-step S312).
Step S302, by the time the load balancing cycle timer is overtime, and processing overtime message is handled as follows: at first judge whether to satisfy the load balancing executive condition according to this sub-district and the information on load through the mutual adjacent sub-district of X2 oral sex; Secondly,, then, select to wait to delete the UE tabulation of load balancing measurement configuration, go to step S304 by looking for certain criterion to select the balanced UE tabulation of candidate if satisfy the load balancing executive condition.
Step S304, connect reallocation message through RRC and issue the load balancing measurement configuration to the balanced UE of candidate; Connect reallocation message to waiting that the UE that deletes the load balancing measurement configuration deletes the load balancing measurement configuration down, goes to rapid S306 through RRC.
Step S306, eNodeB receive that the RRC of UE connects reprovision and accomplishes message, and RRC connects reprovision to be accomplished, and goes to rapid S308.
Step S308, eNodeB wait for that UE reports the measurement report (MR, Measurement Report) based on load balancing.When eNodeB receives the measurement report based on load balancing that UE reports, go to rapid S310.
Step S310, eNodeB carry out the load balancing judgement, judge that whether UE satisfies balanced condition to Target cell, if satisfy, then goes to step S312; Otherwise, go to step S308.
The X2 that step S312, eNodeB carry out based on load balancing switches.
Fig. 4 is a base station internal loading equalization processing method sketch map according to the preferred embodiment of the invention, and as shown in Figure 4, this method may further comprise the steps (step S402-step S412).
Step S402, by the time the load balancing cycle timer is overtime, processing overtime message.Handle as follows: at first the information on load according to this sub-district and adjacent sub-district judges whether to satisfy the load balancing executive condition; Secondly,, then, select to wait to delete the UE tabulation of load balancing measurement configuration, go to step S404 by looking for certain criterion to select the balanced UE tabulation of candidate if satisfy the load balancing executive condition.
Step S404, connect reallocation message through RRC and issue the load balancing measurement configuration to the balanced UE of candidate; Connect reallocation message to waiting that the UE that deletes the load balancing measurement configuration deletes the load balancing measurement configuration down, goes to step S406 through RRC.
Step S406, eNodeB receive that the RRC of UE connects reprovision and accomplishes message, and RRC connects reprovision to be accomplished, and goes to step S408.
Step S408, eNodeB wait for that UE reports the measurement report (MR, Measurement Report) based on load balancing.When eNodeB receives the measurement report based on load balancing that UE reports, go to step S410.
Step S410, eNodeB carry out the load balancing judgement, judge that whether UE satisfies balanced condition to Target cell, if satisfy, then goes to step S412; Otherwise, go to step S408.
Step S412, eNodeB carry out the base station intra based on load balancing.
Fig. 5 is that load balancing stops process chart according to the preferred embodiment of the invention, and is as shown in Figure 5, and this flow process may further comprise the steps (step S502-step S506).
Step S502, sub-district are in normal condition, and eNodeB adds up T continuously
LoadB/ T
SampleThe mean value of the cell load that inferior MAC resource measurement module reports.If the cell load equalization function enables and load balancing starts, but the average load of sub-district starts thresholding and load balancing amount of hysteresis sum less than load balancing, then goes to step S504; Otherwise, return.
Step S504, stop the load balancing cycle timer, go to step S506.
Step S506, all load balancing X2 that stop this sub-district measure.
Fig. 6 is that load balancing X2 measures startup processing method sketch map according to the preferred embodiment of the invention, and as shown in Figure 6, this method may further comprise the steps (step S602-step S608).
Step S602, organize X2 to measure demand; The public-measurement module of source eNodeB is according to all the adjacent sub-districts of this sub-district that obtains and the load balancing configuration parameter of adjacent sub-district; The adjacent sub-district that the load balancing function is enabled is divided into some measurement groups by the base station that belongs to, and goes to step S604.
It is the measurement request of start that the public-measurement module of step S604, source eNodeB is sent request type to the corresponding target eNode B that has the X2 mouth respectively according to the measurement demand of tissue, goes to step S606.
After step S606, target eNode B public-measurement module are received measurement request, distribute the measurement ID of target side, and bring source with the measurement ID of target side through measuring response message.Start timer according to the resource status update cycle of carrying in the measurement request simultaneously, go to step S608.
Step S608, when the resource status update cycle then, target eNode B public-measurement module is organized the resource state information of each measurement cell of carrying in the measurement request, and brings source through the resource status updating message.Start the next resource status update cycle simultaneously.
Fig. 7 is that load balancing X2 measures the stop treatment method sketch map according to the preferred embodiment of the invention, and as shown in Figure 7, this method may further comprise the steps (step S702-step S706).
All X2 measurement groups that this sub-district of public-measurement module traversal of step S702, source eNodeB exists, sending request type to the target eNode B of correspondence is the measurement request of stop, goes to step S704.
The public-measurement module of step S704, target eNode B is received and is stopped to kill resource status renewal timer after the measurement request, reclaims and measures the ID resource, and send the measurement response message to source eNodeB, goes to step S706.
After the public-measurement module of step S706, source eNodeB is received the measurement response message from target eNode B, remove corresponding measurement demand, and the measurement ID resource of the source of returning.
Fig. 8 is a load balancing cycle timer timeout treatment flow chart according to the preferred embodiment of the invention, and as shown in Figure 7, this flow process may further comprise the steps (step S802-step S808).
Step S802, calculate the uplink and downlink load equalizing coefficient of this sub-district and all adjacent sub-districts, go to step S804;
Step S804, judge whether this sub-district satisfies the load balancing executive condition.Carry out thresholding if load balancing is satisfied in up-downgoing simultaneously, then priority treatment is descending, handles up again.Judgment condition is: whether A, this sub-district are that load is the heaviest in this sub-district and all the adjacent sub-districts; Whether the load of B, this sub-district reaches the load balancing of this sub-district is carried out thresholding.If above-mentioned condition then goes to step S808 as long as one is not satisfied; Otherwise, go to step S806;
Step S806, the balanced UE of selection candidate, processing procedure is: (1) is sorted to UE from small to large by average base priority and is obtained a formation; (2) number of resources of using by reality sorts to UE from big to small and obtains the another one formation; (3) obtain the order of same UE in different queue, and carry out the last priority level that weighted calculation obtains UE by the weight of place formation; (4) from small to large UE is sorted according to priority; (5) begin to select successively the UE that satisfies condition of some (webmaster is configurable) to put into the balanced UE tabulation of candidate from first UE; Condition is: A, do not have emergence call service; B, be not in load balancing incision guard mode; Table tennis load balancing phenomenon takes place in the UE for fear of the load balancing incision, has introduced a protection duration, and this protection duration background net management is configurable.Be that the UE of load balancing incision has only above this protection duration and just possibly selectedly again be load balancing candidate UE etc., go to step S808;
Step S808, obtain the UE tabulation of waiting to delete the load balancing measurement configuration, a last load balancing cycle was chosen as candidate UE but does not receive that the UE of load balancing measurement report puts into deletion load balancing measurement configuration UE tabulation, returns.
Fig. 9 is a load balancing flowchart according to the preferred embodiment of the invention, and is as shown in Figure 9, and this flow process may further comprise the steps (step S902-step S912).
Adjacent cell list filters in step S902, the load balancing measurement report that UE is reported; Then the sub-district of remainder is according to priority carried out from big to small, go to step S904.
Step S904, Target cell of selection go to step S906.
Step S906, obtain the direction of load balancing under this UE, promptly this UE selects as candidate UE because of upstream or downstream satisfy the load balancing condition, and pre-estimation UE equilibrium to the Target cell counterparty to the load that produces, go to step S908.
Step S908, calculate Target cell the counterparty to the load summation: the make progress load sum of this UE equilibrium to Target cell generation of load and pre-estimation of Target cell of counterparty; Judge then whether the counterparty satisfies condition to Target cell, and condition is following: the Target cell counterparty whether the load summation of A, Target cell obtains less than the parameter configuration module from webmaster to load balancing carry out thresholding; If whether the load summation of B, Target cell satisfy condition, then goes to step S912 less than the load (load of this sub-district deducts this UE and is balanced to the load that the Target cell pre-estimation reduces) after the preparatory renewal in this sub-district; Otherwise, go to step S910.
Step S910, not with this UE equilibrium to Target cell, select next Target cell, if be last sub-district, then return; Otherwise, go to step S906.
Step S912, this UE is balanced to Target cell through switching returns.
The load equalization method that adopts the foregoing description to provide; Through introducing the mode of load balancing amount of hysteresis; When the average load of judging this sub-district is greater than the difference between load balancing thresholding and the load balancing amount of hysteresis, confirm load balancing is carried out in this sub-district and adjacent sub-district, reduce the X2 interface load and avoided X2 to measure ping-pong simultaneously; Simultaneously; Consider the base priority of UE, guaranteed the experience of high-priority users, thereby reached reliability, ageing, the constringent effect that improves load balancing.
Figure 10 is the structured flowchart according to the load balancing device of the embodiment of the invention; The load balancing of this device in order to realize that the foregoing description provides; This device is positioned at evolved base station (eNodeB); Shown in figure 10, this device mainly comprises: acquisition module 10, first judge module 20 and balance module 30.Wherein, acquisition module 10 is used to obtain the average load of this sub-district in the predetermined balanced cycle; First judge module 20; Be connected to acquisition module 10; Be used to judge that whether average load is greater than the difference between load balancing thresholding and the load balancing amount of hysteresis; In judged result is under the situation that is, continues to judge whether this sub-district and this adjacent cells of cells satisfy predetermined load balancing executive condition; Balance module 30 is connected to first judge module 20, and the continuation judged result that is used at determination module is under the situation that is, the UE that satisfies predetermined candidate's condition in all user equipment (UE)s under this sub-district is balanced to the Target cell in the adjacent sub-district.
Figure 11 is the structured flowchart of load balancing device according to the preferred embodiment of the invention; Shown in figure 11; In the load balancing device that the preferred embodiment provides, acquisition module 10 can comprise: sampling unit 12 is used for according to the sampling period resource operating position of this sub-district being sampled; First receiving element 14 is connected to sampling unit 12, is used in the balanced cycle, receiving a plurality of information on loads, wherein, the sampled result that each information on load obtains after for each sampling period is interior the resource operating position of this sub-district being sampled; Computing unit 16 is connected to first receiving element 14, is used for a plurality of information on loads are averaged calculating, obtains average load.
In the load balancing device that the preferred embodiment provides, first judge module 20 can comprise: acquiring unit 22 is used to obtain this sub-district and the adjacent sub-district mutual interactive information of loading; Judging unit 24 is connected to acquiring unit 22, is used for continuing to judge whether this sub-district and adjacent sub-district satisfy the load balancing executive condition according to interactive information.
In the load balancing device that the preferred embodiment provides, balance module 30 can comprise: transmitting element 32 is used for the load balancing measurement configuration parameter that gets access to is sent to the UE that satisfies candidate's condition; Second receiving element 34; Be connected to transmitting element 32; Be used to receive that the UE that satisfies candidate's condition reports adjacent sub-district is carried out the load balancing measurement report that obtains after load balancing is measured according to load balancing measurement configuration parameter; Wherein, carry the measurement result information of adjacent sub-district in the load balancing measurement report; Balanced unit 36 is connected to second receiving element 34, be used for confirming Target cell from adjacent sub-district according to the measurement result information of load and the adjacent sub-district of satisfying the load of the UE of candidate's condition, adjacent sub-district, and the UE that will satisfy candidate's condition is balanced to Target cell.
In a preferred embodiment, the load balancing executive condition can comprise: the load of adjacent sub-district surpasses predetermined load balancing execution thresholding less than the load of this sub-district and the load of this sub-district.
In a preferred embodiment, candidate's condition can comprise: do not have emergence call service, be not in load balancing incision guard mode and support different-frequency measure and the alien frequencies switching.
Preferably, the load balancing device that the preferred embodiment provides can also comprise: second judge module 40, be connected to balance module 30 be used to judge average load whether less than load balancing thresholding and load balancing amount of hysteresis and value; Processing module 50 is connected to second judge module 40, be used for second judge module judge average load less than with the situation of value under, finish the current load balancing state that load balancing is operated that carries out, otherwise, keep and meet equilibrium state.
The load balancing device that adopts the foregoing description to provide; Through introducing the mode of load balancing amount of hysteresis; When the average load of judging this sub-district is greater than the difference between load balancing thresholding and the load balancing amount of hysteresis, confirm load balancing is carried out in this sub-district and adjacent sub-district, reduce the X2 interface load and avoided X2 to measure ping-pong simultaneously; Simultaneously; Consider the base priority of UE, guaranteed the experience of high-priority users, thereby reached reliability, ageing, the constringent effect that improves load balancing.
From above description, can find out that the present invention has realized following technique effect: the load condition according to this sub-district dynamically starts and stops the X2 measurement, and introduces an amount of hysteresis, has reduced the X2 interface load and has avoided X2 to measure ping-pong simultaneously; When selecting balanced UE, considered the scheduling situation of UE, improved the ageing of load balancing; Consider the base priority of UE simultaneously, guaranteed the experience of high-priority users; Introduce guard time, avoided the table tennis equalizing effect; Employing has improved balanced reliability based on the load balancing of strategy, and simultaneously, when load balancing was carried out, whether first anticipation UE can transship after being balanced to Target cell, if overload then is not balanced to Target cell with UE, has improved convergence.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation element; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. a load equalization method is characterized in that, comprising:
Obtain the average load of this sub-district in the predetermined balanced cycle;
Judge that said average load whether greater than the difference between load balancing thresholding and the load balancing amount of hysteresis, is under the situation that is in judged result, continue to judge whether said this sub-district and said adjacent cells of cells satisfy predetermined load balancing executive condition;
Continuing judged result is under the situation that is, the UE that satisfies predetermined candidate's condition in all user equipment (UE)s under said this sub-district is balanced to the Target cell in the said adjacent sub-district.
2. method according to claim 1 is characterized in that, obtains the average load of this sub-district in the predetermined balanced cycle, comprising:
The resource operating position of said this sub-district is sampled according to the said sampling period;
In the said balanced cycle, receive a plurality of information on loads, wherein, the sampled result that each said information on load obtains after for each said sampling period is interior the resource operating position of said this sub-district being sampled;
A plurality of said information on loads are averaged calculating, obtain said average load.
3. method according to claim 1 is characterized in that, continues to judge whether said this sub-district and said adjacent cells of cells satisfy predetermined load balancing executive condition, comprising:
Obtain said this sub-district and the said adjacent sub-district mutual interactive information of loading, wherein, comprise the load of said adjacent sub-district in the said exchange message;
Continue to judge whether said this sub-district and said adjacent sub-district satisfy said load balancing executive condition according to said interactive information.
4. method according to claim 3 is characterized in that, the UE that satisfies predetermined candidate's condition in all user equipment (UE)s under said this sub-district is balanced in the Target cell in the said adjacent sub-district, comprising:
The load balancing measurement configuration parameter that gets access to is sent to the UE that satisfies said candidate's condition;
What receive that the said UE that satisfies said candidate's condition reports carries out the load balancing measurement report that obtains after load balancing is measured according to said load balancing measurement configuration parameter to said adjacent sub-district; Wherein, carry the measurement result information of said adjacent sub-district in the said load balancing measurement report;
Satisfy the load of the load of the UE of said candidate's condition, said adjacent sub-district and measurement result information definite said Target cell from said adjacent sub-district of said adjacent sub-district according to said, and the said UE that satisfies said candidate's condition is balanced to said Target cell.
5. according to each described method in the claim 1 to 4, it is characterized in that said load balancing executive condition comprises:
The load of said adjacent sub-district surpasses predetermined load balancing execution thresholding less than the load of said this sub-district and the load of said this sub-district.
6. method according to claim 5 is characterized in that, said candidate's condition comprises: do not have emergence call service, be not in load balancing incision guard mode and support different-frequency measure and the alien frequencies switching.
7. method according to claim 6 is characterized in that, the UE that in all user equipment (UE)s under said this sub-district, satisfies predetermined candidate's condition is balanced to after the Target cell in the said adjacent sub-district, and said method also comprises:
Judge said average load whether less than said load balancing thresholding and said load balancing amount of hysteresis and value;
Under the situation of said average load less than said and value, finish the current load balancing state that carries out the load balancing operation, otherwise, keep the said equilibrium state that meets.
8. a load balancing device is positioned at evolved base station eNodeB, it is characterized in that, comprising:
Acquisition module is used to obtain the average load of this sub-district in the predetermined balanced cycle;
First judge module; Be used to judge that whether said average load is greater than the difference between load balancing thresholding and the load balancing amount of hysteresis; In judged result is under the situation that is, continues to judge whether said this sub-district and said adjacent cells of cells satisfy predetermined load balancing executive condition;
Balance module, the continuation judged result that is used at said determination module is under the situation that is, the UE that satisfies predetermined candidate's condition in all user equipment (UE)s under said this sub-district is balanced to the Target cell in the said adjacent sub-district.
9. device according to claim 8 is characterized in that, said acquisition module comprises:
Sampling unit is used for according to the said sampling period resource operating position of said this sub-district being sampled;
First receiving element is used in the said balanced cycle, receiving a plurality of information on loads, wherein, and the sampled result that each said information on load obtains after for each said sampling period is interior the resource operating position of said this sub-district being sampled;
Computing unit is used for a plurality of said information on loads are averaged calculating, obtains said average load.
10. device according to claim 8 is characterized in that, said first judge module comprises:
Acquiring unit is used to obtain said this sub-district and the said adjacent sub-district mutual interactive information of loading, and wherein, comprises the load of said adjacent sub-district in the said exchange message;
Judging unit is used for continuing to judge whether said this sub-district and said adjacent sub-district satisfy said load balancing executive condition according to said interactive information.
11. device according to claim 10 is characterized in that, said balance module comprises:
Transmitting element is used for the load balancing measurement configuration parameter that gets access to is sent to the UE that satisfies said candidate's condition;
Second receiving element; Be used to receive that the said UE that satisfies said candidate's condition reports said adjacent sub-district is carried out the load balancing measurement report that obtains after load balancing is measured according to said load balancing measurement configuration parameter; Wherein, carry the measurement result information of said adjacent sub-district in the said load balancing measurement report;
Balanced unit; Be used for confirming said Target cell from said adjacent sub-district, and the said UE that satisfies said candidate's condition is balanced to said Target cell according to the measurement result information of said load that satisfies the load of the UE of said candidate's condition, said adjacent sub-district and said adjacent sub-district.
12. each described device in 11 according to Claim 8 is characterized in that said load balancing executive condition comprises: the load of said adjacent sub-district surpasses predetermined load balancing less than the load of the load of said this sub-district and said this sub-district and carries out thresholding.
13. device according to claim 12 is characterized in that, said candidate's condition comprises: do not have emergence call service, be not in load balancing incision guard mode and support different-frequency measure and the alien frequencies switching.
14. device according to claim 13 is characterized in that, said device also comprises:
Second judge module, be used to judge said average load whether less than said load balancing thresholding and said load balancing amount of hysteresis and value;
Processing module is used for judging under the situation of said average load less than said and value at said second judge module, finishes the current load balancing state that carries out the load balancing operation, otherwise, keep the said equilibrium state that meets.
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