CN104519528B - A kind of method and device of determining unloading adjacent area - Google Patents
A kind of method and device of determining unloading adjacent area Download PDFInfo
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- CN104519528B CN104519528B CN201410773346.5A CN201410773346A CN104519528B CN 104519528 B CN104519528 B CN 104519528B CN 201410773346 A CN201410773346 A CN 201410773346A CN 104519528 B CN104519528 B CN 104519528B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/08—Load balancing or load distribution
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Abstract
The embodiment of the invention discloses a kind of method and devices of determining unloading adjacent area.The embodiment of the present invention is by determining that the first MLB candidates of the cell for triggering mobility load balance MLB unload adjacent area set, obtain the load information of the adjacent area of the cell in the set of the first MLB candidates unloading adjacent area, the load information of the adjacent area of the cell in the set of adjacent area and the laod stability of the cell in the set of the first MLB candidates unloading adjacent area are unloaded according to the first MLB candidates, the cell selection MLB for being the triggering MLB is unloaded in the set of adjacent area from the first MLB candidates unloads adjacent area, to realize in the selection that MLB unloads adjacent area, fully consider the laod stability of a jump adjacent area and the load percentage of two jump adjacent areas, effectively avoid load table tennis adjustment problem.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of method and devices of determining unloading adjacent area.
Background technology
Mobility load balance (Mobility Load Balancing, MLB) in LTE SON networks refers to radio honeycomb
System can detect overloaded cells in the case of no manual intervention, and automatic execution load-balancing algorithm will be in overloaded cells
A part of business be transferred to and load in relatively light neighboring community.Load transfer is mainly by switching this specific means
It realizes.In Practical Project, measurement reports of the LTE with frequency switching is generally triggered using A3 events, by adaptively changing cell
Shifted relative (Cell Individual Offset, CIO) and lag parameter etc. change cell coverage area indirectly, make to be in
The poor user of Hot Spot marginal channels situation can automatically switch to the relatively good neighbour of channel condition and load condition
Area makes internetwork load tend to balance to reduce the load of Hot Spot.
Load regulation method used in the prior art is by the way that the load of overloaded cells is introduced into geographical location phase
It closely and loads in minimum adjacent area, to reduce the load of overloaded cells.As shown in Figure 1, ABCD totally 4 cells are co-existed in,
The handoff boundary of the two neighboring cell of where the dotted line signifies that, it is known that B and D overloads, A and C light loads, and the load of C is less than A,
Terminal UE 1-UE9 is edge UE, and by the prior art, typically by the adjacent area of edge UE tangential loads minimum, i.e. B passes through boundary
Adjustment, is unloaded to C, while D is unloaded to C by boundary adjustment UE7, UE8 and UE9, to cause cell C by UE4, UE5 and UE6
There is new overload phenomenon, needs the adjustment of load for carrying out a new round so that whole network adjustment of load convergence rate is slower.
Invention content
The embodiment of the present invention provides a kind of method and device of determining unloading adjacent area, solves to bear in the prior art to realize
Carry table tennis adjustment problem.
A kind of method of determining unloading adjacent area provided in an embodiment of the present invention, including：
Determine that the first MLB candidates of the cell of triggering mobility load balance MLB unload adjacent area set, the first MLB is waited
One of the cell comprising the triggering MLB jumps adjacent area in the set of choosing unloading adjacent area；
Obtain the load information of the adjacent area of the cell in the set of the first MLB candidates unloading adjacent area；The load information
The load percentage of the adjacent area of the cell in the set of adjacent area is unloaded including the first MLB candidates；
The load information and described first of the adjacent area of the cell in the set of adjacent area is unloaded according to the first MLB candidates
MLB candidates unload the laod stability of the cell in the set of adjacent area, and it is described to be unloaded in the set of adjacent area from the first MLB candidates
The cell selection MLB for triggering MLB unloads adjacent area；Wherein, the laod stability of cell is the historic load information according to the cell
What statistics obtained.
Preferably, when the average load of cell is more than the first thresholding, MLB is triggered；Wherein, the average load root of the cell
It is obtained according to following formula：
Loadi=a*Si+(1-a)*Loadi-1
Wherein, SiIndicate that the load statistics value in i-th of measurement period, a indicate filtering factor, LoadiIndicate i-th of system
Count the average load in the period, Loadi-1Indicate the average load in (i-1)-th measurement period.
Preferably, the first MLB candidates of the cell of the determining triggering MLB unload adjacent area set, including：
Receive the measurement report that the edge termination in the cell of the triggering MLB reports；
According to the measurement report from the adjacent area of the cell of the triggering MLB, Reference Signal Received Power RSRP is selected
More than the second thresholding and average load is less than the cell of third thresholding, obtains the first MLB candidates and unloads adjacent area set.
Preferably, the load information of the adjacent area of the cell in the set of the first MLB candidates unloading adjacent area is obtained, including：
Each cell in the set of adjacent area is unloaded to the first MLB candidates send load measure request message respectively, and
It receives the first MLB candidates and unloads the response that each cell in the set of adjacent area is returned according to the load measure request message
Message carries the load information of the adjacent area for the cell for sending the response message in the response message；
Alternatively, sending load information inquiry request to load balancing Centralized Controller, and receives the load balancing and concentrate
Controller unloads the adjacent area of the cell in the set of adjacent area according to the first MLB candidates that the load information inquiry request returns
Load information.
Preferably, the laod stability of the cell is obtained according to following formula：
Wherein, D is the laod stability of cell；SiThe load statistics value for being the cell in i-th of measurement period, n are
Measurement period number.
Preferably, the cell for being the triggering MLB that unloaded in the set of adjacent area from the first MLB candidates selects MLB
Adjacent area is unloaded, including：
If it includes two or more cells that the first MLB candidates, which unload in the set of adjacent area, described first is selected
MLB candidates unload the maximum cell of laod stability and the first MLB candidates in the set of adjacent area unload in the set of adjacent area with
Cell of the laod stability difference of the maximum cell of laod stability in the first preset threshold range, obtains second
MLB candidates unload adjacent area set；
The load information that the adjacent area of the cell in the set of adjacent area is unloaded according to the 2nd MLB candidates, from the 2nd MLB
The cell selection MLB unloadings adjacent area for being the triggering MLB in the set of candidate's unloading adjacent area.
Preferably, the cell for being the triggering MLB that unloaded in the set of adjacent area from the first MLB candidates selects MLB
Adjacent area is unloaded, including：
If it includes two or more cells that the first MLB candidates, which unload in the set of adjacent area, described first is selected
MLB candidates unload the cell of load percentage minimum and the load percentage with the cell of load percentage minimum in the set of adjacent area
Cell of the difference in the second preset threshold range obtains the 2nd MLB candidates and unloads adjacent area set；
The laod stability that the cell in the set of adjacent area is unloaded according to the 2nd MLB candidates, from the 2nd MLB candidates
It is the cell selection MLB unloadings adjacent area of the triggering MLB in the set of unloading adjacent area.
A kind of base station provided in an embodiment of the present invention, including：
Candidate adjacent module is determined, for determining that it is adjacent that the first MLB candidates of the cell of triggering mobility load balance MLB unload
Area gathers, and one of the cell comprising the triggering MLB jumps adjacent area in the set of the first MLB candidates unloading adjacent area；
Loading information module is obtained, the adjacent area of cell in the set of adjacent area is unloaded for obtaining the first MLB candidates
Load information；The load information includes the load percentage of the adjacent area of the cell in the set of the first MLB candidates unloading adjacent area；
Selection unloading adjacent area module is used to unload the adjacent area of the cell in the set of adjacent area according to the first MLB candidates
Load information and the first MLB candidates unload the laod stability of the cell in the set of adjacent area, from the first MLB candidates
It is the cell selection MLB unloadings adjacent area of the triggering MLB in the set of unloading adjacent area；Wherein, the laod stability of cell is basis
What the historic load Information Statistics of the cell obtained.
Preferably, the base station further includes：
It determining overloaded cells module, when for judging that the average load of cell is more than the first thresholding, determining that the cell is tactile
Send out the cell of MLB；Wherein, the average load of the cell is obtained according to following formula：
Loadi=a*Si+(1-a)*Loadi-1
Wherein, SiIndicate that the load statistics value in i-th of measurement period, a indicate filtering factor, LoadiIndicate i-th of system
Count the average load in the period, Loadi-1Indicate the average load in (i-1)-th measurement period.
Preferably, the determining candidate adjacent module is specifically used for：
Receive the measurement report that the edge termination in the cell of the triggering MLB reports；
According to the measurement report from the adjacent area of the cell of the triggering MLB, selects RSRP to be more than the second thresholding and put down
Load obtains the first MLB candidates and unloads adjacent area set less than the cell of third thresholding.
Preferably, the acquisition loading information module is specifically used for：
Each cell in the set of adjacent area is unloaded to the first MLB candidates send load measure request message respectively, and
It receives the first MLB candidates and unloads the response that each cell in the set of adjacent area is returned according to the load measure request message
Message carries the load information of the adjacent area for the cell for sending the response message in the response message；
Alternatively, sending load information inquiry request to load balancing Centralized Controller, and receives the load balancing and concentrate
Controller unloads the adjacent area of the cell in the set of adjacent area according to the first MLB candidates that the load information inquiry request returns
Load information.
Preferably, the laod stability of the cell is obtained according to following formula：
Wherein, D is the laod stability of cell；SiThe load statistics value for being the cell in i-th of measurement period, n are
Measurement period number.
Preferably, the selection unloading adjacent area module is additionally operable to：
If it includes two or more cells that the first MLB candidates, which unload in the set of adjacent area, described first is selected
MLB candidates unload the maximum cell of laod stability and the first MLB candidates in the set of adjacent area unload in the set of adjacent area with
Cell of the laod stability difference of the maximum cell of laod stability in the first preset threshold range, obtains second
MLB candidates unload adjacent area set；
The load information that the adjacent area of the cell in the set of adjacent area is unloaded according to the 2nd MLB candidates, from the 2nd MLB
The cell selection MLB unloadings adjacent area for being the triggering MLB in the set of candidate's unloading adjacent area.
Preferably, the selection unloading adjacent area module is additionally operable to：
If it includes two or more cells that the first MLB candidates, which unload in the set of adjacent area, described first is selected
MLB candidates unload the cell of load percentage minimum and the load percentage with the cell of load percentage minimum in the set of adjacent area
Cell of the difference in the second preset threshold range obtains the 2nd MLB candidates and unloads adjacent area set；
The laod stability that the cell in the set of adjacent area is unloaded according to the 2nd MLB candidates, from the 2nd MLB candidates
It is the cell selection MLB unloadings adjacent area of the triggering MLB in the set of unloading adjacent area.
The embodiment of the present invention is by determining that the first MLB candidates of the cell for triggering mobility load balance MLB unload adjacent area collection
It closes, obtains the load information of the adjacent area of the cell in the set of the first MLB candidates unloading adjacent area, waited according to the first MLB
The load information of the adjacent area of cell in the set of choosing unloading adjacent area and the first MLB candidates unload the cell in the set of adjacent area
Laod stability, it is adjacent that the cell selection MLB unloadings for being the triggering MLB are unloaded in the set of adjacent area from the first MLB candidates
Area, to realize in the selection that MLB unloads adjacent area, the laod stability and two that fully consider a jump adjacent area jump adjacent area
Load percentage effectively avoids load table tennis adjustment problem.
Description of the drawings
Fig. 1 is load regulation method schematic diagram in the prior art；
Fig. 2 is a kind of process schematic of determining unloading adjacent area provided in an embodiment of the present invention；
Fig. 3 is that a load information flow chart for jumping adjacent area and/or two jump adjacent areas is obtained in the embodiment of the present invention；
Fig. 4 is a kind of base station schematic diagram provided in an embodiment of the present invention.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
Fig. 2 be it is provided in an embodiment of the present invention it is a kind of it is determining unloading adjacent area process schematic, include the following steps 201 to
Step 203：
Step 201, determine that the first MLB candidates of the cell of triggering mobility load balance MLB unload adjacent area set, described the
One MLB candidates unload a jump adjacent area of the cell comprising the triggering MLB in the set of adjacent area；
Step 202, the load information of the adjacent area of the cell in the set of the first MLB candidates unloading adjacent area is obtained；It is described
Load information includes the load percentage of the adjacent area of the cell in the set of the first MLB candidates unloading adjacent area；
Step 203, load information and the institute of the adjacent area of the cell in the set of adjacent area are unloaded according to the first MLB candidates
The laod stability for stating the cell that the first MLB candidates unload in the set of adjacent area is unloaded from the first MLB candidates in the set of adjacent area
Cell for the triggering MLB selects MLB to unload adjacent area；Wherein, the laod stability of cell is negative according to the history of the cell
Carry what Information Statistics obtained.
Specifically, before step 201, base station periodically detects the loading condition of this cell, small when being calculated
When the average load in area is more than the first thresholding, it is determined that this cell is overloaded cells in this period, that is, determines that this is small in this period
Area is the cell for triggering MLB.
Optionally, the average load of cell is obtained according to following formula：
Loadi=a*Si+(1-a)*Loadi-1
Wherein, SiIndicate that the load statistics value in i-th of measurement period, a indicate filtering factor, LoadiIndicate i-th of system
Count the average load in the period, Loadi-1Indicate the average load in (i-1)-th measurement period.
Further, first thresholding is preset value, such as can be redefined for 85%.The load includes
Downlink PRB utilization rate DL GBR PRB usage, uplink PRB utilization rate UL GBR PRB usage, the non-GBR traffic PRB of downlink
Utilization rate DL non-GBR PRB usage, non-GBR traffic PRB utilization rates UL non-GBR PRB usage of uplink, downlink are total
PRB utilization rate DL Total PRB usage, total PRB utilization rates UL Total PRB usage of uplink, hardware load
The one of which or several such as Hardware Load Indicator, S1 transport network layer load S1TNL Load Indicator.
Preferably, in step 201, the first MLB candidates of the cell of the determining triggering MLB unload adjacent area set, packet
It includes：
Receive the measurement report that the edge termination in the cell of the triggering MLB reports；
According to the measurement report from the adjacent area of the cell of the triggering MLB, RSRP is more than the second thresholding and averagely bears
The cell less than third thresholding is carried, the first MLB candidates is obtained and unloads adjacent area set.
Specifically, base station is each edge UE configuration A3 measurement events in the cell for trigger MLB, and when edge, UE meets A3
When event, just to base station reporting measurement reports.The measurement report that base station is reported according to edge UE, according to the adjacent area for meeting A3 events
And its RSRP information, RSRP is more than the second thresholding and average load is less than the cell of third thresholding, and it is candidate to obtain the first MLB
Unload adjacent area set.
Wherein, the second thresholding and third thresholding are preset value；The A3 events refer to the measurement matter when adjacent cell
Amount reports the adjacent area when being better than the relative threshold of current service cell configuration.By relevant criterion, A3 events are defined as：
Wherein, Mn (Ms) indicates the RSRP measured values of adjacent area (serving cell)；
Ofn (Ofs) expression adjacent area (serving cell) respective frequencies particular offsets, unit dB,
Ocn (Ocs) indicates the cell specific offset of adjacent area (serving cell), unit dB.
Off indicates the biasing of serving cell, unit dB；
Hys indicates magnetic hysteresis, unit dB.
Preferably, in step 202, the first MLB candidates being obtained by two ways and are unloaded in the set of adjacent area
The load information of the adjacent area of cell, it is specific as follows.
(1) mode one
Assuming that base station eNB 1 determines that its cell is when triggering the cell of MLB, eNB1 jumps adjacent area to the one of the cell for triggering MLB
Management base station (such as eNB2) send RESOURCE STATUS REQUEST message, request eNB2 starts to measure its management
The load information of cell.Wherein, RESOURCE STATUS REQUEST message includes the loadtype (PRB that need to be measured
Usage, HW Load, TNL Load etc.), cell list, the report information such as period.It is also multiplexed the message in addition, stopping measuring.
After eNB2 receives RESOURCE STATUS REQUEST message, if can accordingly be measured, it can respond
RESOURCE STATUS RESPONSE message, proceeds by load measure；Otherwise, RESOURCE STATUS can be responded
FAILURE message.
The load information of the adjacent area of the cell in the set of adjacent area is unloaded for acquisition the first MLB candidates, the present invention is implemented
It, can be to the cell of triggering MLB after eNB2 receives the RESOURCE STATUS REQUEST message of eNB1 transmissions in example
The two management base stations (such as eNB3) for jumping adjacent area send RESOURCE STATUS REQUEST message.ENB3 is received
After RESOURCE STATUS REQUEST message, then the two of the cell for triggering MLB can be jumped with adjacent area and carry out load measure, and will
Measurement feedback is to eNB2.Optionally, the measurement result of eNB3 feedbacks is each two loading conditions for jumping adjacent area, by eNB2 roots
The two of the cell of the triggering MLB load percentage for jumping adjacent area is calculated according to the eNB3 measurement results fed back.
ENB2 is completed after measuring, and the cell of MLB can will be triggered periodically through RESOURCE STATUS UPDATE messages
One jump adjacent area load information and trigger MLB cell two jump adjacent areas load informations feed back to eNB1 together, until
Receive the order that eNB1 is measured by the stopping that RESOURCE STATUS REQUEST message is sent.
The embodiment of the present invention is to prevent RESOURCE STATUS REQUEST from infinitely transmitting, to RESOURCE STATUS
REQUEST message is improved, and has increased Request Hop fields newly.As shown in table 1, the ranging from 0-1 of Request Hop,
Initial value is set as 1.For any cell, Request is detected after receiving RESOURCE STATUS REQUEST message
Hop is 0, then no longer sends RESOURCE STATUS REQUEST message to the adjacent area of itself, so as to anti-by this method
Only RESOURCE STATUS REQUEST infinite searchings lower the expense of network signal.
Table 1：RESOURCE STATUS REQUEST message explanations
Correspondingly, the embodiment of the present invention also improves RESOURCE STATUS UPDATE messages, increases 2-Hop newly
Neighbor Cell Load fields, the load informations of two jump adjacent areas of the cell for indicating triggering MLB are as shown in table 2
Improved RESOURCE STATUS UPDATE.Wherein, the load information of two jump adjacent areas of the cell of the triggering MLB refers to
Trigger the load percentage for the adjacent area that the one of the cell of MLB jumps adjacent area, value range 0-100.Adjacent area is jumped for each one, if
The number of the one all adjacent areas for jumping adjacent area is n, and the number of overload adjacent area is m in all adjacent areas of the jump adjacent area, then described
It is m/n*100 to trigger the load information that the two of the cell of MLB jumps adjacent area；If the number of all adjacent areas for jumping adjacent area is 0,
The load information that the two of the cell of the triggering MLB jump adjacent area is 0.
Table 2：RESOURCE STATUS UPDATE message explanations
Wherein, the judgment method of two jump adjacent area overload is：
1), as Hardware Load Indicator and S1TNL Load Indicator instruction High Load or/and
When Overload, it is judged as overloading.
2), when the PRB utilization rates of Radio Resource Status instructions are more than threshold value (such as 90%), it is judged as
Overload.
The implementation process described in aforesaid way one is specifically described with reference to Fig. 3.
Step 301, eNB1 (the management base station of the cell of triggering MLB) (triggers the management of the adjacent area of the cell of MLB to eNB2
Base station) RESOURCE STATUS REQUEST message is sent, execute step 302；
Step 302, eNB2 receives the RESOURCE STATUS REQUEST message that eNB1 is sent, and whether judges its adjacent area
For sky, if so, 303 are thened follow the steps, if it is not, executing step 304；
Step 303, eNB2 carries out load measure to this cell (trigger the cell of MLB one jumps adjacent area), fills in
RESOURCE STATUS UPDATE messages, wherein Cell Measurement Result Item part are the load of this cell
Information, 2-Hop Neighbor Cell Load fill out 0, and RESOURCE STATUS UPDATE are returned to eNB1, and eNB1 can
It is counted to obtain the cell load stability according to the load information of the eNB2 cells returned；
Step 304, eNB2 detects the value of Request Hop in RESOURCE STATUS REQUEST message, if 0, then
It executes step 305 and thens follow the steps 306 if 1；
Step 305, eNB2 is not necessarily to carry out load survey to the adjacent area (the two jump adjacent areas for triggering the cell of MLB) of this cell
Amount, and load measure directly is carried out to this cell, and the load information of this cell is passed through into RESOURCE STATUS UPDATE
Message returns to eNB1, and eNB1 can be counted to obtain the load stabilization of the cell according to the load information of the eNB2 cells returned
Degree；
Step 306, eNB2 sends RESOURCE to eNB3 (triggering the two of the cell of the MLB management base station for jumping adjacent area)
STATUS REQUEST message, and according to eNB3 return measurement result obtain triggering MLB cell two jump adjacent areas load
Information executes step 307；
Step 307, the load information one that eNB2 jumps adjacent areas by the two of the cell of the load information of this cell and triggering MLB
And feed back to eNB1.
(2) mode two
Base station periodically detects the load information of this cell, and the load information of this cell and adjacent zone information reporting are arrived
Load balancing Centralized Controller.In this way, load balancing Centralized Controller includes on all base stations being attached thereto
The load information and its neighboring BS information of report.
It is equal to load if base station eNB 1 will obtain the load information of its adjacent area (including adjacent areas are jumped in a jump adjacent area and two)
The Centralized Controller that weighs sends adjacent area load information inquiry request message, and the cell that a jump adjacent area is carried in the request message is global
Identifier (E-UTRAN Cell Global Identifier, ECGI) information；Load balancing Centralized Controller receives the request
After message, the ECGI information that adjacent area is jumped according to one reads a load information for jumping adjacent area, forms one and jumps adjacent area load information；It reads
Corresponding one jumps the ECGI information of the adjacent area of adjacent area, and the ECGI information for the adjacent area for jumping adjacent area according to one reads the adjacent area that one jumps adjacent area
Load information forms two and jumps adjacent area load information；It finally integrates one and jumps adjacent area load information and two jump adjacent area load informations, pass through
Adjacent area load information query response message returns to eNB1.
Wherein, the definition of adjacent area load information inquiry request message is as shown in table 3, and e Source eNB1ID refer to eNB1
The ECGI information of this cell, and Cell To Report->Cell To Report Item->Cell ID indicate that one jumps adjacent area
ECGI information.
Table 3：Adjacent area load information inquiry request message table
| IE/Group Name | Presence | Range |
| Message Type | M | |
| Source eNB1ID | M | |
| Report Characteristics | O | |
| Cell To Report | 1 | |
| >Cell To Report Item | 1to maxCellineNB | |
| >>Cell ID | M |
Wherein adjacent area load information query response message definition is as shown in table 4,
Optionally, (a) form can be used to indicate the two specific load informations for jumping adjacent area, such as Neighbor Cell
Shown in Measurement Result cells.
Optionally, it (b) form can be used not provide the specific load information of two jump adjacent areas, but load balancing needed to concentrate control
The load information that device pair two processed jumps adjacent area is made whether that overload judges, and only fills in two jump adjacent areas overload percentage.
Optionally, (c) form can be used to provide the laod stability Load stability of a jump adjacent area.
Table 4：Adjacent area load information query response message table
(a)
(b)
(c)
Preferably, the laod stability of the cell is obtained according to following formula：
Wherein, D is the laod stability of cell；SiThe load statistics value for being the cell in i-th of measurement period, n are
Measurement period number.
Preferably, in step 203, can be unloaded in the set of adjacent area as institute from the first MLB candidates by two ways
The cell selection MLB unloadings adjacent area of triggering MLB is stated, it is specific as follows.
(1) mode one
Situation 1：If it only includes a cell that the first MLB candidates, which unload in the set of adjacent area, directly using the cell as MLB
Unload adjacent area.
Situation 2：If it includes two or more cells that the first MLB candidates, which unload in the set of adjacent area, the first MLB is selected
In the set of candidate's unloading adjacent area the maximum cell of laod stability and the first MLB candidates unload in the set of adjacent area with load stabilization
Cell of the laod stability difference of maximum cell in the first preset threshold range is spent, the 2nd MLB candidates is obtained and unloads neighbour
Gather in area；The load information that the adjacent area of the cell in the set of adjacent area is unloaded according to the 2nd MLB candidates, from the 2nd MLB
The cell selection MLB unloadings adjacent area for being the triggering MLB in the set of candidate's unloading adjacent area.
For example, it includes Cell1, Cell2, Cell3, Cell4, Cell5 that the first MLB candidates, which unload adjacent area set, it is assumed that meter
It is respectively D1=4.2, D2=2.5, D3=6.3, D4=3.6, D5=2.7 that calculation, which obtains the load stabilization angle value of each cell,.By
This is it is found that the maximum cell of laod stability is Cell2.Assuming that first threshold is ranging from less than or equal to 2, then second is can be obtained
It should include Cell1, Cell2, Cell4, Cell5 that MLB candidates, which unload in the set of adjacent area,.It can be obtained according to above-mentioned steps 202
The load information of the respective adjacent area Cell1, Cell2, Cell4 and Cell5, the i.e. load percentage of adjacent area, it is assumed that the Cell1 of acquisition
Adjacent area load percentage be 50, Cell2 adjacent area load percentage be 30, Cell4 the load percentage of adjacent area be 20,
The load percentage of the adjacent area of Cell5 is 30.At this point, preferentially selection is adjacent in tetra- cells of Cell1, Cell2, Cell4 and Cell5
The cell that the load percentage in area is minimum unloads adjacent area as MLB, that is, Cell4 is selected to unload adjacent area as MLB.
(2) mode two
Situation 1：If it only includes a cell that the first MLB candidates, which unload in the set of adjacent area, directly using the cell as MLB
Unload adjacent area.
Situation 2：If it includes two or more cells that the first MLB candidates, which unload in the set of adjacent area, the first MLB is selected
Candidate unloads the cell of load percentage minimum in the set of adjacent area and exists with the load percentage difference of the cell of load percentage minimum
Cell in second preset threshold range obtains the 2nd MLB candidates and unloads adjacent area set；Adjacent area is unloaded according to the 2nd MLB candidates
The laod stability of cell in set unloads in the set of adjacent area from the 2nd MLB candidates and selects MLB to unload for the cell of triggering MLB
Carry adjacent area.
For example, it includes Cell1, Cell2, Cell3, Cell4, Cell5 that the first MLB candidates, which unload adjacent area set, it is assumed that obtain
The load percentage of the adjacent area of the Cell1 taken is the load percentage that the load percentage of the adjacent area of 50, Cell2 is the adjacent area of 30, Cell3
The load percentage for the adjacent area that load percentage for the adjacent area of 40, Cell4 is 20, Cell5 is 30.It follows that the load of adjacent area
The minimum cell of ratio is Cell4.Assuming that the second preset threshold range is less than or equal to 20, then the 2nd MLB candidates can be obtained and unload
It should includes Cell2, Cell3, Cell4, Cell5 to carry in the set of adjacent area.By calculating the laod stability of each cell, D2 is obtained
=2.5, D3=6.3, D4=3.6, D5=2.7.At this point, preferentially being selected in tetra- cells of Cell2, Cell3, Cell4 and Cell5
The maximum cell of laod stability for selecting adjacent area unloads adjacent area as MLB, that is, Cell2 is selected to unload adjacent area as MLB.
The embodiment of the present invention is designed by introducing the laod stability that one jumps adjacent area, and the history for both having considered a jump adjacent area is negative
Information carrying ceases, its degree of jitter is assessed further through laod stability, to which in unloading Target cell selection, edge UE be unloaded to
In the adjacent area that load is stablized and is lightly loaded relatively, avoid due to load table tennis adjustment problem caused by load jitter so that entire
Network load is more balanced；Also, the present invention, when selection target unloads cell, is fully examined when carrying out load balancing adjustment
Consider two load informations for jumping adjacent area, will not cause multiple overloaded cells that load is unloaded to the same cell, causes secondary negative
Adjustment problem is carried, network convergence is faster.In addition to this, the present invention is not only suitable for distribution, is also applied for centralization, and distribution needs
X2 interface is carried out simply enhancing, and centralization is not necessarily to modify to existing interface, therefore the present invention is in compatibility
Property and scalability are stronger.
For above method flow, the embodiment of the present invention also provides a kind of base station, and the particular content of the base station is referred to
The above method is implemented, and details are not described herein.
Fig. 4 is a kind of base station schematic diagram provided in an embodiment of the present invention, which includes：
Candidate adjacent module 402 is determined, for determining that the first MLB candidates of the cell of triggering mobility load balance MLB unload
Adjacent area set is carried, in the set of the first MLB candidates unloading adjacent area include the cell of the triggering MLB one jumps adjacent area；
Loading information module 403 is obtained, the adjacent area of the cell in the set of adjacent area is unloaded for obtaining the first MLB candidates
Load information；The load information includes the duty factor of the adjacent area of the cell in the set of the first MLB candidates unloading adjacent area
Example；
Selection unloading adjacent area module 404, the adjacent area for unloading the cell in the set of adjacent area according to the first MLB candidates
Load information and the first MLB candidates unload adjacent area set in cell laod stability, from the first MLB wait
The cell selection MLB unloadings adjacent area for being the triggering MLB in the set of choosing unloading adjacent area；Wherein, the laod stability of cell is root
It is obtained according to the historic load Information Statistics of the cell.
Preferably, the base station further includes：
It determining overloaded cells module 401, when for judging that the average load of cell is more than the first thresholding, determining that the cell is
Trigger the cell of MLB；Wherein, the average load of the cell is obtained according to following formula：
Loadi=a*Si+(1-a)*Loadi-1
Wherein, SiIndicate that the load statistics value in i-th of measurement period, a indicate filtering factor, LoadiIndicate i-th of system
Count the average load in the period, Loadi-1Indicate the average load in (i-1)-th measurement period.
Preferably, the determining candidate adjacent module 402 is specifically used for：
Receive the measurement report that the edge termination in the cell of the triggering MLB reports；
According to the measurement report from the adjacent area of the cell of the triggering MLB, selects RSRP to be more than the second thresholding and put down
Load obtains the first MLB candidates and unloads adjacent area set less than the cell of third thresholding.
Preferably, the acquisition loading information module 403 is specifically used for：
Each cell in the set of adjacent area is unloaded to the first MLB candidates send load measure request message respectively, and
It receives the first MLB candidates and unloads the response that each cell in the set of adjacent area is returned according to the load measure request message
Message carries the load information of the adjacent area for the cell for sending the response message in the response message；
Alternatively, sending load information inquiry request to load balancing Centralized Controller, and receives the load balancing and concentrate
Controller unloads the adjacent area of the cell in the set of adjacent area according to the first MLB candidates that the load information inquiry request returns
Load information.
Preferably, the laod stability of the cell is obtained according to following formula：
Wherein, D is the laod stability of cell；SiThe load statistics value for being the cell in i-th of measurement period, n are
Measurement period number.
Preferably, the selection unloading adjacent area module 404 is additionally operable to：
If it includes two or more cells that the first MLB candidates, which unload in the set of adjacent area, described first is selected
MLB candidates unload the maximum cell of laod stability and the first MLB candidates in the set of adjacent area unload in the set of adjacent area with
Cell of the laod stability difference of the maximum cell of laod stability in the first preset threshold range, obtains second
MLB candidates unload adjacent area set；
The load information that the adjacent area of the cell in the set of adjacent area is unloaded according to the 2nd MLB candidates, from the 2nd MLB
The cell selection MLB unloadings adjacent area for being the triggering MLB in the set of candidate's unloading adjacent area.
Preferably, the selection unloading adjacent area module 404 is additionally operable to：
If it includes two or more cells that the first MLB candidates, which unload in the set of adjacent area, described first is selected
MLB candidates unload the cell of load percentage minimum and the load percentage with the cell of load percentage minimum in the set of adjacent area
Cell of the difference in the second preset threshold range obtains the 2nd MLB candidates and unloads adjacent area set；
The laod stability that the cell in the set of adjacent area is unloaded according to the 2nd MLB candidates, from the 2nd MLB candidates
It is the cell selection MLB unloadings adjacent area of the triggering MLB in the set of unloading adjacent area.
It can be seen from the above：The embodiment of the present invention is by determining the of the cell for triggering mobility load balance MLB
One MLB candidates unload adjacent area set, obtain the load letter of the adjacent area of the cell in the set of the first MLB candidates unloading adjacent area
Breath, load information and the first MLB that the adjacent area of the cell in the set of adjacent area is unloaded according to the first MLB candidates are candidate
The laod stability for unloading the cell in the set of adjacent area, it is the triggering MLB to be unloaded in the set of adjacent area from the first MLB candidates
Cell selection MLB unload adjacent area, to realize MLB unload adjacent area selection on, fully consider the load of a jump adjacent area
The load percentage of stability and two jump adjacent areas effectively avoids load table tennis adjustment problem.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method or computer program product.
Therefore, complete hardware embodiment, complete software embodiment or embodiment combining software and hardware aspects can be used in the present invention
Form.It is deposited moreover, the present invention can be used to can be used in the computer that one or more wherein includes computer usable program code
The shape for the computer program product implemented on storage media (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
Formula.
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
Instruct the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine so that the instruction executed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (14)
1. a kind of method of determining unloading adjacent area, which is characterized in that this method includes：
Determine that the first MLB candidates of the cell of triggering mobility load balance MLB unload adjacent area set, the first MLB candidates unload
Carry the cell comprising the triggering MLB in the set of adjacent area one jumps adjacent area；
Obtain the load information of the adjacent area of the cell in the set of the first MLB candidates unloading adjacent area；The load information includes
The first MLB candidates unload the load percentage of the adjacent area of the cell in the set of adjacent area；
The load information and the first MLB that the adjacent area of the cell in the set of adjacent area is unloaded according to the first MLB candidates are waited
The laod stability of cell in the set of choosing unloading adjacent area, it is the triggering to be unloaded in the set of adjacent area from the first MLB candidates
The cell selection MLB of MLB unloads adjacent area；Wherein, the laod stability of cell is the historic load Information Statistics according to the cell
It obtains.
2. the method as described in claim 1, which is characterized in that when the average load of cell is more than the first thresholding, trigger MLB；
Wherein, the average load of the cell is obtained according to following formula：
Loadi=α * Si+(1-α)*Loadi-1
Wherein, SiIndicate that the load statistics value in i-th of measurement period, α indicate filtering factor, LoadiIndicate i-th of statistics week
Average load in phase, Loadi-1Indicate the average load in (i-1)-th measurement period.
3. the method as described in claim 1, which is characterized in that the first MLB candidates unloading of the cell of the determining triggering MLB
Adjacent area is gathered, including：
Receive the measurement report that the edge termination in the cell of the triggering MLB reports；
According to the measurement report from the adjacent area of the cell of the triggering MLB, Reference Signal Received Power RSRP is selected to be more than
Second thresholding and average load are less than the cell of third thresholding, obtain the first MLB candidates and unload adjacent area set.
4. the method as described in claim 1, which is characterized in that obtain small in the set of the first MLB candidates unloading adjacent area
The load information of the adjacent area in area, including：
Each cell in the set of adjacent area is unloaded to the first MLB candidates respectively and send load measure request message, and receive
Each cell that the first MLB candidates unload in the set of adjacent area disappears according to the response that the load measure request message returns
It ceases, the load information of the adjacent area for the cell for sending the response message is carried in the response message；
Alternatively, sending load information inquiry request to load balancing Centralized Controller, and receive the load balancing centralized control
Device unloads the negative of the adjacent area of the cell in the set of adjacent area according to the first MLB candidates that the load information inquiry request returns
Information carrying ceases.
5. the method as described in claim 1, which is characterized in that the laod stability of the cell is obtained according to following formula：
Wherein, D is the laod stability of cell；SiThe load statistics value for being the cell in i-th of measurement period, n are statistics week
Issue.
6. the method as described in any one of claim 1-5, which is characterized in that described to unload neighbour from the first MLB candidates
It is the cell selection MLB unloadings adjacent area of the triggering MLB in area's set, including：
If it includes two or more cells that the first MLB candidates, which unload in the set of adjacent area, the first MLB is selected to wait
It selects in the set of unloading adjacent area and is born with described in the maximum cell of laod stability and the first MLB candidates unloading adjacent area set
Cell of the laod stability difference of the maximum cell of stability in the first preset threshold range is carried, the 2nd MLB candidates are obtained
Unload adjacent area set；
The load information that the adjacent area of the cell in the set of adjacent area is unloaded according to the 2nd MLB candidates, from the 2nd MLB candidates
It is the cell selection MLB unloadings adjacent area of the triggering MLB in the set of unloading adjacent area.
7. the method as described in any one of claim 1-5, which is characterized in that described to unload neighbour from the first MLB candidates
It is the cell selection MLB unloadings adjacent area of the triggering MLB in area's set, including：
If it includes two or more cells that the first MLB candidates, which unload in the set of adjacent area, the first MLB is selected to wait
The cell of load percentage minimum and the load percentage difference with the cell of load percentage minimum in the set of choosing unloading adjacent area
Cell in the second preset threshold range obtains the 2nd MLB candidates and unloads adjacent area set；
The laod stability that the cell in the set of adjacent area is unloaded according to the 2nd MLB candidates, unloads from the 2nd MLB candidates
It is the cell selection MLB unloadings adjacent area of the triggering MLB in the set of adjacent area.
8. a kind of base station, which is characterized in that the base station includes：
Candidate adjacent module is determined, for determining that the first MLB candidates of the cell of triggering mobility load balance MLB unload adjacent area collection
It closes, one of the cell comprising the triggering MLB jumps adjacent area in the set of the first MLB candidates unloading adjacent area；
Loading information module is obtained, the load of the adjacent area for obtaining the cell in the set of the first MLB candidates unloading adjacent area
Information；The load information includes the load percentage of the adjacent area of the cell in the set of the first MLB candidates unloading adjacent area；
Selection unloading adjacent area module, the load of the adjacent area for unloading the cell in the set of adjacent area according to the first MLB candidates
Information and the first MLB candidates unload the laod stability of the cell in the set of adjacent area, are unloaded from the first MLB candidates
It is the cell selection MLB unloadings adjacent area of the triggering MLB in the set of adjacent area；Wherein, the laod stability of cell is small according to this
What the historic load Information Statistics in area obtained.
9. base station as claimed in claim 8, which is characterized in that further include：
It determining overloaded cells module, when for judging that the average load of cell is more than the first thresholding, determining that the cell is triggering MLB
Cell；Wherein, the average load of the cell is obtained according to following formula：
Loadi=α * Si+(1-α)*Loadi-1
Wherein, SiIndicate that the load statistics value in i-th of measurement period, α indicate filtering factor, LoadiIndicate i-th of statistics week
Average load in phase, Loadi-1Indicate the average load in (i-1)-th measurement period.
10. base station as claimed in claim 8, which is characterized in that the determining candidate adjacent module is specifically used for：
Receive the measurement report that the edge termination in the cell of the triggering MLB reports；
According to the measurement report from the adjacent area of the cell of the triggering MLB, selects RSRP to be more than the second thresholding and averagely bear
The cell less than third thresholding is carried, the first MLB candidates is obtained and unloads adjacent area set.
11. base station as claimed in claim 8, which is characterized in that the acquisition loading information module is specifically used for：
Each cell in the set of adjacent area is unloaded to the first MLB candidates respectively and send load measure request message, and receive
Each cell that the first MLB candidates unload in the set of adjacent area disappears according to the response that the load measure request message returns
It ceases, the load information of the adjacent area for the cell for sending the response message is carried in the response message；
Alternatively, sending load information inquiry request to load balancing Centralized Controller, and receive the load balancing centralized control
Device unloads the negative of the adjacent area of the cell in the set of adjacent area according to the first MLB candidates that the load information inquiry request returns
Information carrying ceases.
12. base station as claimed in claim 8, which is characterized in that the laod stability of the cell is obtained according to following formula：
Wherein, D is the laod stability of cell；SiThe load statistics value for being the cell in i-th of measurement period, n are statistics week
Issue.
13. the base station as described in any one of claim 8-12, which is characterized in that the selection unloading adjacent area module is also used
In：
If it includes two or more cells that the first MLB candidates, which unload in the set of adjacent area, the first MLB is selected to wait
It selects in the set of unloading adjacent area and is born with described in the maximum cell of laod stability and the first MLB candidates unloading adjacent area set
Cell of the laod stability difference of the maximum cell of stability in the first preset threshold range is carried, the 2nd MLB candidates are obtained
Unload adjacent area set；
The load information that the adjacent area of the cell in the set of adjacent area is unloaded according to the 2nd MLB candidates, from the 2nd MLB candidates
It is the cell selection MLB unloadings adjacent area of the triggering MLB in the set of unloading adjacent area.
14. the base station as described in any one of claim 8-12, which is characterized in that the selection unloading adjacent area module is also used
In：
If it includes two or more cells that the first MLB candidates, which unload in the set of adjacent area, the first MLB is selected to wait
The cell of load percentage minimum and the load percentage difference with the cell of load percentage minimum in the set of choosing unloading adjacent area
Cell in the second preset threshold range obtains the 2nd MLB candidates and unloads adjacent area set；
The laod stability that the cell in the set of adjacent area is unloaded according to the 2nd MLB candidates, unloads from the 2nd MLB candidates
It is the cell selection MLB unloadings adjacent area of the triggering MLB in the set of adjacent area.
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| CN201410773346.5A CN104519528B (en) | 2014-12-12 | 2014-12-12 | A kind of method and device of determining unloading adjacent area |
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| CN201410773346.5A CN104519528B (en) | 2014-12-12 | 2014-12-12 | A kind of method and device of determining unloading adjacent area |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102143529A (en) * | 2010-01-29 | 2011-08-03 | ***通信集团公司 | Load balancing method and equipment |
| CN102202351A (en) * | 2011-06-13 | 2011-09-28 | 北京邮电大学 | Method for optimizing load balance among cells |
| CN102256304A (en) * | 2010-05-19 | 2011-11-23 | 电信科学技术研究院 | Base station communication method and base station |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102143529A (en) * | 2010-01-29 | 2011-08-03 | ***通信集团公司 | Load balancing method and equipment |
| CN102256304A (en) * | 2010-05-19 | 2011-11-23 | 电信科学技术研究院 | Base station communication method and base station |
| CN102202351A (en) * | 2011-06-13 | 2011-09-28 | 北京邮电大学 | Method for optimizing load balance among cells |
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