CN103237328A - Load balancing method and equipment based on automatic cell coverage adjustment - Google Patents
Load balancing method and equipment based on automatic cell coverage adjustment Download PDFInfo
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- CN103237328A CN103237328A CN201310125603XA CN201310125603A CN103237328A CN 103237328 A CN103237328 A CN 103237328A CN 201310125603X A CN201310125603X A CN 201310125603XA CN 201310125603 A CN201310125603 A CN 201310125603A CN 103237328 A CN103237328 A CN 103237328A
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Abstract
An embodiment of the invention discloses a load balancing method and equipment based on automatic cell coverage adjustment. By application of the technical scheme, the cell reference signal power of an origin cell is decreased after edge users are switched out, and the cell reference signal power of a target cell is increased, so that signals of the origin cell can be weakened with switching out of the edge users, signals of the target cell can be strengthened with switching in of new edge users, and further respective coverage areas of the two cells are adjusted automatically with load of the two cells unchanged. Therefore, the edge users switching from the origin cell to the target cell due to load balancing requirement can receive stronger signals of the target cell under the circumstance of position invariance, undesired signal strength of the origin signal is reduced, wireless channel environment of the users switched out is optimized, and user service awareness is improved.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of load-balancing method and equipment of adjusting covering based on the residential quarter automatically.
Background technology
Present load-balancing technique mainly is when judging that by the base station certain cell load is higher, will select reselecting parameters or measure such as be redirected by switching, revise the residential quarter, make certain customers leave this residential quarter, transfer to the adjacent area that load is lighter or the residential quarter that covers together on every side, redistribute the purpose of low residential quarter from high residential quarter with regard to having reached to load like this.
In realizing process of the present invention, the inventor finds to exist at least in the prior art following problem:
Present load-balancing technique is just considered the loading condition of this residential quarter and adjacent residential quarter, and does not consider that those are forced to switch user's channel situation because load balancing is required.These users are forced to after Serving cell switches to Target cell, and wireless signal will certainly descend to some extent, and then cause the customer service perception to descend.If by the base station two cell powers are adjusted, make it coverage and change along with the change of edge customer Serving cell of living in, will under the condition that does not change loading condition, further improve the wireless channel environment of edge customer.
Summary of the invention
The embodiment of the invention provides a kind of and adjusts load-balancing method and the equipment of covering automatically based on the residential quarter, solves after residential quarter in the existing technical scheme switches the problem that user's wireless signal descends.
For achieving the above object, the embodiment of the invention provides a kind of on the one hand and has adjusted the load-balancing method of covering automatically based on the residential quarter, may further comprise the steps at least:
When the load of cell-of-origin reached the load balancing handoff threshold, source cell base station determined that in the edge customer that satisfies the switching position thresholding needs switch to the edge customer of described Target cell;
Described source cell base station switches to described Target cell with the edge customer that described needs switch to described Target cell;
After the edge customer that described source cell base station indicates all need switch to described Target cell is finished switching, described source cell base station reduces the cell reference signals power of self, simultaneously, raise self cell reference signals power of target cell base station is so that described all edge customers that need switch to described Target cell are within the signal cover of described Target cell.
On the other hand, the embodiment of the invention also provides a kind of base station, comprising:
Determination module, when the load that is used for the residential quarter that belongs to when described base station reached the load balancing handoff threshold, definite needs switched to the edge customer of described Target cell in the edge customer that satisfies the switching position thresholding;
Handover module switches to described Target cell for the edge customer that the determined needs of described determination module is switched to described Target cell;
Power conditioning module, be used for after the edge customer that described handover module indicates all need switch to described Target cell is finished switching, reduce the cell reference signals power of self, simultaneously, raise self cell reference signals power of target cell base station is so that described all edge customers that need switch to described Target cell are within the signal cover of described Target cell;
Wherein, when described base station during as target cell base station, described power conditioning module also be used for raising self cell reference signals power.
Compared with prior art, the technical scheme that proposes of the embodiment of the invention has the following advantages:
By using the technical scheme that the embodiment of the invention proposes, the cell-of-origin reduces the cell reference signals power of self after the switching of carrying out edge customer, then raise self cell reference signals power of Target cell, thereby, the signal of cell-of-origin can reduce along with cutting out of edge customer, and the signal of Target cell can raise along with the incision of new edge customer, so, these two residential quarters are when proof load is constant, automatically adjusted coverage separately, make because of the load balancing needs, switch to these edge customers of Target cell from the cell-of-origin, can under the situation of invariant position, receive the stronger signal of Target cell, and reduced the unwanted signal intensity of cell-of-origin, optimize these and be switched user's wireless channel environment, improved the customer service perception.
Description of drawings
A kind of schematic flow sheet of adjusting the load-balancing method of covering based on the residential quarter automatically that Fig. 1 proposes for the embodiment of the invention;
The schematic diagram of the application scenarios of Fig. 2 A to Fig. 2 D is that the embodiment of the invention proposes a kind of load-balancing method of adjusting covering based on the residential quarter automatically;
Automatically adjust the schematic flow sheet of the load-balancing method of covering based on the residential quarter under a kind of concrete application scenarios that Fig. 3 proposes for the embodiment of the invention;
Fig. 4 is the structural representation of a kind of base station of embodiment of the invention proposition.
Embodiment
As stated in the Background Art, present load-balancing technique is just considered the loading condition of this residential quarter and adjacent residential quarter, and does not consider that those are forced to switch user's channel situation because load balancing is required.These users are forced to after Serving cell switches to Target cell, and wireless signal will certainly descend to some extent, and then cause the customer service perception to descend.If by the base station two cell powers are adjusted, make it coverage and change along with the change of edge customer Serving cell of living in, will under the condition that does not change loading condition, further improve the wireless channel environment of edge customer.
In order to overcome such defective, the embodiment of the invention has proposed a kind of load-balancing method of adjusting covering based on the residential quarter automatically, on existing load-balancing technique, added the self-adjusting function of cell power, the coverage of neighbor cell can be adjusted accordingly according to different loading levels, thereby make the user that to switch because of load balancing, still can be in the relative good channel environment.
As shown in Figure 1, a kind ofly adjust the schematic flow sheet of the load-balancing method of covering automatically based on the residential quarter for what the embodiment of the invention proposed, this method specifically may further comprise the steps:
Step S101, when the load of cell-of-origin reaches the load balancing handoff threshold, source cell base station determines that in the edge customer that satisfies the switching position thresholding needs switch to the edge customer of described Target cell.
In concrete application scenarios, this step also comprises before carrying out:
The resource status that described source cell base station periodically sends according to other cell base stations upgrades, and determines to send that to satisfy the residential quarter that base station that pre-conditioned resource status upgrades belongs to be the Target cell that edge customer switches.
What need describe is that " other residential quarters " that this example proposes is specially the residential quarter that neighboring BS relationship is arranged with the cell-of-origin.
In this step, when the load of cell-of-origin reaches the load balancing handoff threshold, all had the loading condition of the residential quarter of neighboring BS relationship around the cell-of-origin can be inquired with it, loading condition (being that resource status upgrades) separately also can be informed in these residential quarters always to the cell-of-origin of this overload, the Target cell of load balancing can be selected to carry out in the cell-of-origin in those residential quarters that allow load to enter.
Concrete selective rule can be that the loading condition current according to each residential quarter (specifically can comprise resources occupation rate; and/or the surplus resources total amount etc.); also can be according to actual physical distance between cell-of-origin and each residential quarter etc.; concrete which kind of rule that adopts can determine that such variation can't influence protection scope of the present invention according to the real system needs.
In the application scenarios of reality, described resource status upgrades, and specifically triggers in the following manner:
When the current load in described cell-of-origin reached the resource reporting thresholding, described source cell base station sent the resource status request to other cell base stations;
Described source cell base station periodically receives the resource status that other cell base stations send and upgrades after receiving the resource status response that other cell base stations return;
When the current load in described cell-of-origin was lower than the resource reporting thresholding, described source cell base station notified other cell base stations to stop to send the resource status renewal.
On this basis, the concrete implementation of this step is as follows:
Described source cell base station is determined the corresponding positional information of each edge customer according to the measurement report that the described edge customer that satisfies the switching position thresholding reports;
Described source cell base station determines to switch to the edge customer of described Target cell according to the resource state information of described positional information and described Target cell.
Step S102, described source cell base station switch to described Target cell with the edge customer that described needs switch to described Target cell.
Concrete, the concrete implementation of this step is as follows:
Described source cell base station sends handover request to described target cell base station;
Described source cell base station receives the Handover Request Acknowledge that described target cell base station is returned;
Described source cell base station begins indication to the edge customer transmission switching that described needs switch to described Target cell.
Step S103, after the edge customer that described source cell base station indicates all need switch to described Target cell is finished switching, described source cell base station reduces the cell reference signals power of self, simultaneously, raise self cell reference signals power of target cell base station is so that described all edge customers that need switch to described Target cell are within the signal cover of described Target cell.
Compared with prior art, the technical scheme that proposes of the embodiment of the invention has the following advantages:
By using the technical scheme that the embodiment of the invention proposes, the cell-of-origin reduces the cell reference signals power of self after the switching of carrying out edge customer, then raise self cell reference signals power of Target cell, thereby, the signal of cell-of-origin can reduce along with cutting out of edge customer, and the signal of Target cell can raise along with the incision of new edge customer, so, these two residential quarters are when proof load is constant, automatically adjusted coverage separately, make because of the load balancing needs, switch to these edge customers of Target cell from the cell-of-origin, can under the situation of invariant position, receive the stronger signal of Target cell, and reduced the unwanted signal intensity of cell-of-origin, optimize these and be switched user's wireless channel environment, improved the customer service perception.
Below, in conjunction with concrete application scenarios, the technical scheme that the embodiment of the invention is proposed describes.
Concrete operation principle schematic diagram is as follows:
Shown in Fig. 2 A to 2D, the schematic diagram of the application scenarios of a kind of load-balancing method of adjusting covering based on the residential quarter automatically that proposes for the embodiment of the invention.
Shown in Fig. 2 A, when residential quarter A transshipped, the user that the base station can attempt to be in cell edge switched to the relatively low residential quarter B of load.
Shown in Fig. 2 B, after edge customer switches to residential quarter B, just this user be in the middle of the covering of residential quarter B, but this moment in this position stronger residential quarter a-signal is arranged still, cause this user's wireless environment to descend to some extent.
Shown in Fig. 2 C, after edge customer is finished switching, if residential quarter A can adjust the power of self automatically, dwindle coverage, then can under the situation that does not influence load, reduce the interference to edge customer, thereby can allow edge customer better receive the signal of residential quarter B.
Shown in Fig. 2 D, by these those long modes that disappear, A, B adjust coverage in two residential quarters automatically, finally form the stable state situation.
As shown in Figure 3, adjust the schematic flow sheet of the load-balancing method of covering automatically based on the residential quarter under a kind of concrete application scenarios that proposes for the embodiment of the invention, specifically may further comprise the steps:
The base station eNB A of step S301, residential quarter A sends resource status request (Resource Status Request) to the base station eNB B of residential quarter B.
In the A of residential quarter, along with the user constantly increases, the load in the A of residential quarter increases gradually.When load reached the resource reporting thresholding, residential quarter A began to send Resource Status Request to residential quarter B, set up annexation with residential quarter B with this, and inquired the loading condition that it is current to residential quarter B.
Step S302, eNB B send resource status response (Resource Status Response) to eNB A.
Residential quarter B sends Resource Status Response to residential quarter A after receiving the resource status request, confirm to set up success and finish initialization with being connected of residential quarter A.
Step S303, eNB B periodically send resource status to eNB A and upgrade (Resource Status Update).
After residential quarter B set up success and finishes initialization with being connected of residential quarter A in step S302, residential quarter B will report Resource Status Update to residential quarter A always, the loading condition that reporting cell B is current.
Simultaneously, Resource Status Update switches the main foundation of selecting the residential quarter as residential quarter A.If the load of residential quarter B is lower than the handoff threshold that residential quarter A arranges, residential quarter A can select residential quarter B as the Target cell that switches so.If the load of residential quarter B is higher than the handoff threshold that residential quarter A arranges, residential quarter A can not be selected into handoff list to residential quarter B so.When the load of residential quarter A is lower than when reporting thresholding, residential quarter A just can inform that residential quarter B stops to report resource status to upgrade by the resource reporting request.
Step S304, after the load of residential quarter A continues to increase and arrives the load balancing handoff threshold, the edge customer in the A of residential quarter can report by the positional information thresholding of base station configuration.
The positional information thresholding is configured to the difference that terminal measures this residential quarter RSRP and adjacent residential quarter RSRP mostly.After the user who is in the edge satisfied positional information and reports thresholding, these users can report the positional information of self by measurement report (Measurement Report).
Like this, the Measurement Report of described Resource Status Update and edge customer can determine which residential quarter which user is switched to, in order to alleviate the loading condition of oneself before the residential quarter A basis.Such as, when the signal strength signal intensity of measuring the signal strength signal intensity of residential quarter B and residential quarter A as one of them user satisfies the thresholding of reporting position information, this terminal reports the positional information of self can for residential quarter A, the Resource Status Update that residential quarter A sent by the residential quarter B cycle, after thinking that residential quarter B satisfies the load balancing switching condition, this user can be switched to residential quarter B.
Concrete handoff procedure as step S305 to shown in the step S306.
Step S305, eNB A send handover request (Handover Request) to eNB B.
Step S306, eNB B return Handover Request Acknowledge (Handover Request Acknowledge) to eNB A.
Step S307, eNB A send to switch to UE and begin indication (Handover Start).
After the edge customer that will satisfy handoff threshold when A base station, residential quarter was forced to switch to residential quarter B, the reduction along with self load formed stable state gradually, can be not again the user of this residential quarter not be forced to switch to residential quarter B.At this moment, for the edge customer that has switched to residential quarter B before, channel circumstance is also bad.Reason is that these edge customers are according to self signal strength signal intensity of living in factors such as (RSRP, SINR), should be in the coverage of residential quarter A after adhering to, but owing to the reason of residential quarter A overload is forced to switch to residential quarter B, and the reason of unprovoked wireless signal switches.Therefore, though these edge customers after the switching are in the B of residential quarter, still can receive stronger residential quarter a-signal, cause these users' SINR certainly will have reduction in various degree, cause quality of service to descend.
Step S308, after eNB A indicates all edge customers to finish switching, the cell reference signals power with self reduces automatically.
Simultaneously, because there is new edge customer to enter residential quarter B, the further execution in step S308 of residential quarter B.
Step S309, eNB B also raise the cell reference signals power of self.
Like this, the signal of residential quarter A can reduce along with cutting out of edge customer, the signal of residential quarter B can raise along with the incision of new edge customer, these two residential quarters can be when proof load be constant so, automatically adjust coverage separately, made because load balancing needs, switched to these users of residential quarter B from residential quarter A, can under the situation of invariant position, receive the stronger signal of residential quarter B, and reduce the unwanted signal intensity of residential quarter A.Thereby, optimized these users' wireless channel environment, improved the customer service perception.
Compared with prior art, the technical scheme that proposes of the embodiment of the invention has the following advantages:
By using the technical scheme that the embodiment of the invention proposes, the cell-of-origin reduces the cell reference signals power of self after the switching of carrying out edge customer, then raise self cell reference signals power of Target cell, thereby, the signal of cell-of-origin can reduce along with cutting out of edge customer, and the signal of Target cell can raise along with the incision of new edge customer, so, these two residential quarters are when proof load is constant, automatically adjusted coverage separately, make because of the load balancing needs, switch to these edge customers of Target cell from the cell-of-origin, can under the situation of invariant position, receive the stronger signal of Target cell, and reduced the unwanted signal intensity of cell-of-origin, optimize these and be switched user's wireless channel environment, improved the customer service perception.
In order to realize the technical scheme of the embodiment of the invention, the embodiment of the invention also provides a kind of base station, and its structural representation comprises as shown in Figure 4 at least:
Wherein, when described base station during as target cell base station, described power conditioning module 43 also be used for raising self cell reference signals power.
In concrete application scenarios, described determination module 41 also is used for:
The resource status that periodically sends according to other cell base stations upgrades, and determines to send that to satisfy the residential quarter that base station that pre-conditioned resource status upgrades belongs to be the Target cell that edge customer switches.
Further, described base station also comprises communication module 44, specifically is used for:
When the current load in residential quarter that belongs to when described base station reaches the resource reporting thresholding, send the resource status request to other cell base stations;
After receiving the resource status response that other cell base stations return, periodically receive the resource status that other cell base stations send and upgrade;
When the current load in residential quarter that belongs to when described base station is lower than the resource reporting thresholding, notifies other cell base stations to stop to send resource status and upgrade.
Concrete, described determination module 41 specifically is used for:
According to the measurement report that the described edge customer that satisfies the switching position thresholding reports, determine the corresponding positional information of each edge customer;
According to the resource state information of described positional information and described Target cell, determine to switch to the edge customer of described Target cell.
On the other hand, described handover module 42 specifically is used for:
Send handover request to described target cell base station;
Receive the Handover Request Acknowledge that described target cell base station is returned;
The edge customer transmission switching that switches to described Target cell to described needs begins indication.
Compared with prior art, the technical scheme that proposes of the embodiment of the invention has the following advantages:
By using the technical scheme that the embodiment of the invention proposes, the cell-of-origin reduces the cell reference signals power of self after the switching of carrying out edge customer, then raise self cell reference signals power of Target cell, thereby, the signal of cell-of-origin can reduce along with cutting out of edge customer, and the signal of Target cell can raise along with the incision of new edge customer, so, these two residential quarters are when proof load is constant, automatically adjusted coverage separately, make because of the load balancing needs, switch to these edge customers of Target cell from the cell-of-origin, can under the situation of invariant position, receive the stronger signal of Target cell, and reduced the unwanted signal intensity of cell-of-origin, optimize these and be switched user's wireless channel environment, improved the customer service perception.
Through the above description of the embodiments, those skilled in the art can be well understood to the embodiment of the invention and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding, the technical scheme of the embodiment of the invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions with so that computer equipment (can be personal computer, server, or network equipment etc.) each implements the described method of scene to carry out the embodiment of the invention.
It will be appreciated by those skilled in the art that accompanying drawing is a preferred schematic diagram of implementing scene, the module in the accompanying drawing or flow process might not be that the enforcement embodiment of the invention is necessary.
It will be appreciated by those skilled in the art that the module in the device of implementing in the scene can be distributed in the device of implementing scene according to implementing scene description, also can carry out respective change and be arranged in the one or more devices that are different from this enforcement scene.The module of above-mentioned enforcement scene can be merged into a module, also can further split into a plurality of submodules.
The invention described above embodiment sequence number does not represent the quality of implementing scene just to description.
More than disclosed only be the several concrete enforcement scene of the embodiment of the invention, still, the embodiment of the invention is not limited thereto, any those skilled in the art can think variation all should fall into the traffic limits scope of the embodiment of the invention.
Claims (10)
1. adjust the load-balancing method of covering automatically based on the residential quarter for one kind, it is characterized in that, may further comprise the steps:
When the load of cell-of-origin reached the load balancing handoff threshold, source cell base station determined that in the edge customer that satisfies the switching position thresholding needs switch to the edge customer of described Target cell;
Described source cell base station switches to described Target cell with the edge customer that described needs switch to described Target cell;
After the edge customer that described source cell base station indicates all need switch to described Target cell is finished switching, described source cell base station reduces the cell reference signals power of self, simultaneously, raise self cell reference signals power of target cell base station is so that described all edge customers that need switch to described Target cell are within the signal cover of described Target cell.
2. the method for claim 1, it is characterized in that, when the load of cell-of-origin reached the load balancing handoff threshold, source cell base station determined that in the edge customer that satisfies the switching position thresholding needs switch to before the edge customer of described Target cell, also comprise:
The resource status that described source cell base station periodically sends according to other cell base stations upgrades, and determines to send that to satisfy the residential quarter that base station that pre-conditioned resource status upgrades belongs to be the Target cell that edge customer switches.
3. method as claimed in claim 2 is characterized in that, described resource status upgrades, and specifically triggers in the following manner:
When the current load in described cell-of-origin reached the resource reporting thresholding, described source cell base station sent the resource status request to other cell base stations;
Described source cell base station periodically receives the resource status that other cell base stations send and upgrades after receiving the resource status response that other cell base stations return;
When the current load in described cell-of-origin was lower than the resource reporting thresholding, described source cell base station notified other cell base stations to stop to send the resource status renewal.
4. the method for claim 1 is characterized in that, when the load of cell-of-origin reached the load balancing handoff threshold, source cell base station determined that in the edge customer that satisfies the switching position thresholding needs switch to the edge customer of described Target cell, specifically comprises:
Described source cell base station is determined the corresponding positional information of each edge customer according to the measurement report that the described edge customer that satisfies the switching position thresholding reports;
Described source cell base station determines to switch to the edge customer of described Target cell according to the resource state information of described positional information and described Target cell.
5. the method for claim 1 is characterized in that, described source cell base station switches to described Target cell with the edge customer that described needs switch to described Target cell, specifically comprises:
Described source cell base station sends handover request to described target cell base station;
Described source cell base station receives the Handover Request Acknowledge that described target cell base station is returned;
Described source cell base station begins indication to the edge customer transmission switching that described needs switch to described Target cell.
6. a base station is characterized in that, comprising:
Determination module, when the load that is used for the residential quarter that belongs to when described base station reached the load balancing handoff threshold, definite needs switched to the edge customer of described Target cell in the edge customer that satisfies the switching position thresholding;
Handover module switches to described Target cell for the edge customer that the determined needs of described determination module is switched to described Target cell;
Power conditioning module, be used for after the edge customer that described handover module indicates all need switch to described Target cell is finished switching, reduce the cell reference signals power of self, simultaneously, raise self cell reference signals power of target cell base station is so that described all edge customers that need switch to described Target cell are within the signal cover of described Target cell;
Wherein, when described base station during as target cell base station, described power conditioning module also be used for raising self cell reference signals power.
7. base station as claimed in claim 6 is characterized in that, described determination module also is used for:
The resource status that periodically sends according to other cell base stations upgrades, and determines to send that to satisfy the residential quarter that base station that pre-conditioned resource status upgrades belongs to be the Target cell that edge customer switches.
8. base station as claimed in claim 7 is characterized in that, also comprises specifically being used for communication module:
When the current load in residential quarter that belongs to when described base station reaches the resource reporting thresholding, send the resource status request to other cell base stations;
After receiving the resource status response that other cell base stations return, periodically receive the resource status that other cell base stations send and upgrade;
When the current load in residential quarter that belongs to when described base station is lower than the resource reporting thresholding, notifies other cell base stations to stop to send resource status and upgrade.
9. base station as claimed in claim 8 is characterized in that, described determination module specifically is used for:
According to the measurement report that the described edge customer that satisfies the switching position thresholding reports, determine the corresponding positional information of each edge customer;
According to the resource state information of described positional information and described Target cell, determine to switch to the edge customer of described Target cell.
10. base station as claimed in claim 6 is characterized in that, described handover module specifically is used for:
Send handover request to described target cell base station;
Receive the Handover Request Acknowledge that described target cell base station is returned;
The edge customer transmission switching that switches to described Target cell to described needs begins indication.
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| CN113347662B (en) * | 2020-02-18 | 2022-09-27 | 中国移动通信集团浙江有限公司 | Load balancing method and device, computing equipment and computer storage medium |
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| CN112770381B (en) * | 2021-01-12 | 2022-02-08 | 中国科学院数学与系统科学研究院 | Method and device for adjusting total pilot signal transmission power of each sub-area in area |
| WO2022151605A1 (en) * | 2021-01-12 | 2022-07-21 | 中国科学院数学与系统科学研究院 | Method and apparatus for adjusting total transmit power of pilot signals in sub-regions of a region |
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