CN104349416A - Switching threshold processing method, device, base station, RNC (Radio Network Controller) and BSC (Base Station Controller) - Google Patents
Switching threshold processing method, device, base station, RNC (Radio Network Controller) and BSC (Base Station Controller) Download PDFInfo
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- CN104349416A CN104349416A CN201310339462.1A CN201310339462A CN104349416A CN 104349416 A CN104349416 A CN 104349416A CN 201310339462 A CN201310339462 A CN 201310339462A CN 104349416 A CN104349416 A CN 104349416A
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/00837—Determination of triggering parameters for hand-off
- H04W36/008375—Determination of triggering parameters for hand-off based on historical data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
- H04W36/305—Handover due to radio link failure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/22—Performing reselection for specific purposes for handling the traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
- H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
Abstract
The invention provides a switching threshold processing method, a device, a base station, an RNC (Radio Network Controller) and a BSC (Base Station Controller). The method comprises the steps: a second network element receives first switching threshold information transmitted by a first network element, wherein the first switching threshold information comprises a first switching threshold and/or a first threshold protection range of the first switching threshold for switching a first cell of the first network element to a second cell of the second network element; the second network element determines second switching threshold information according to the first switching threshold information, wherein the second switching threshold information comprises a second switching threshold and/or a second threshold protection range of the second switching threshold for switching the second cell to the first cell. Through the switching threshold processing method, the device, the base station, the RNC and the BSC, the problems in the related technologies that UE (User Equipment) switching is subjected to frequent switching failure, resources are wasted, the quality of service of UE is lowered, and the user experience is affected are solved, and then, the effects of reducing unnecessary switching, saving the resources and improving the quality of service of UE are achieved.
Description
Technical field
The present invention relates to the communications field, specifically, relate to a kind of handoff threshold processing method, device, base station, radio network controller (Radio Network Controller, referred to as RNC) and base station controller (Base Station Controller, referred to as BSC).
Background technology
Long Term Evolution (Long Term Evolution, referred to as LTE) network is by Universal Terrestrial wireless access network (the Evolved Universal Terrestrial Radio Access Network of evolution, referred to as E-UTRAN) base station eNB (Evolved NodeB) and evolution packet switching center (Evolved Packet Core, referred to as EPC) composition, network flattening.Wherein E-UTRAN comprises the set of the eNB be connected by S1 interface with EPC, connects between eNB by X2.S1, X2 are logic interfacing.An EPC can manage one or more eNB, and an eNB also can be controlled by multiple EPC, and an eNB can manage one or more community.
Universal mobile telecommunications system (Universal Mobile Telecommunication System, referred to as UMTS) network is by radio network controller (RNC) and NodeB and core net (Core Network, referred to as CN) composition, it is wherein IU mouth between CN and RNC, being Iub interface between RNC and nodeB, is Iur interface between RNC and RNC.
Intersystem handover refers to that UE is from a systematic evaluation to another one system, such as, is switched to UMTS system from LTE.
General intersystem handover flow process comprises: UE reporting measurement reports to origin system (such as, system 1) node 1, node 1 determines this UE to be switched in the cell2 of system 2 by the judgement of handoff algorithms, so node 1 carries out switching set-up procedure by the management node 2 of the cell2 switching set-up procedure and system 2, asks UE Resources allocation for this reason.The success of node 2 Resources allocation, then node 1 issues switching command and is linked in system 2 according to switching command to UE, UE, and discharges and the connection of system 2.Common, network side this community according to terminal to report and the signal quality of adjacent area, make handover decisions based on certain handoff algorithms, the signal quality wherein compared in algorithm, is handoff threshold.
Illustrate, between system in the unbalanced situation of load, need the equilibrium carrying out load in different minizones, thus improve capacity and the robustness of whole network, a kind of method is the handoff parameter between amendment system, UE is moved, such as, from high load capacity cell merge to the community of underload in minizone by the switching action of mobile process.Thus the load balancing realized between system.The problem wherein existed is, after amendment handoff parameter, just might not can realize successfully switching, when handoff parameter is improper, also can causes the pingpang handoff of UE, not only waste switchable resource, and cause the Qos of UE to decline, reduce Consumer's Experience.
Therefore, UE in the related switches existence and switches frequent failure, not only wastes resource, and causes the service quality of UE to decline, affect the problem of Consumer's Experience.
Summary of the invention
The invention provides a kind of handoff threshold processing method, device, base station, radio network controller (RNC) and base station controller BSC, switch to exist with the UE at least solved in the related and switch frequent failure, not only waste resource, and cause the service quality of UE to decline, affect the problem of Consumer's Experience.
According to an aspect of the present invention, provide a kind of handoff threshold processing method, comprise: the second network element receives the first handoff threshold information that the first network element sends, wherein, described first handoff threshold information comprises first handoff threshold of the first cell merge to the second community of described second network element and/or the first thresholding protection range of described first handoff threshold of described first network element; Described second network element determines the second handoff threshold information according to described first handoff threshold information; wherein, described second handoff threshold information comprises second handoff threshold of described second cell merge to described first community and/or the second thresholding protection range of described second handoff threshold.
Preferably, when described first handoff threshold information comprises described first handoff threshold and described first thresholding protection range, according to described first handoff threshold information, described second network element determines that described second handoff threshold information comprises: determine the restriction relation met between described first handoff threshold, described first thresholding protection range and described second handoff threshold; Described second handoff threshold is determined according to described restriction relation.
Preferably, described first handoff threshold comprise following one of at least: the lower limit thresholding M3 of the difference of the signal quality of described first community that the signal quality upper limit thresholding M1 of described first community that the signal quality lower limit thresholding M2 of described second community that terminal UE records, described UE record and the signal quality lower limit thresholding M2 of described second community, described UE record and the signal quality of described second community.
Preferably, described first thresholding protection range, described second thresholding protection range be following one of at least: single numerical value, numerical value interval, comprise a maximum and a minimum value.
Preferably, described first handoff threshold information, described second handoff threshold information adopt the form of absolute value and/or relative value to state.
Preferably, described first thresholding protection range, described second thresholding protection range one of at least obtain according to following information: cell signal quality information, the pingpang handoff statistical information of described UE, the handover failure rate of described UE, the pre-configure information of node that the history handover information of terminal UE, described UE measure.
Preferably, after described second network element determines the second handoff threshold information according to described first handoff threshold information, also comprise: described second network element sends measurement configuration information to terminal UE, wherein, described measurement configuration information comprises described second handoff threshold information.
According to a further aspect in the invention, provide a kind of handoff threshold processing unit, comprise: receiver module, the first handoff threshold information of the first network element transmission is received for the second network element, wherein, described first handoff threshold information comprises first handoff threshold of the first cell merge to the second community of described second network element and/or the first thresholding protection range of described first handoff threshold of described first network element; Determination module; the second handoff threshold information is determined according to described first handoff threshold information for described second network element; wherein, described second handoff threshold information comprises second handoff threshold of described second cell merge to described first community and/or the second thresholding protection range of described second handoff threshold.
Preferably, described determination module comprises: the first determining unit, for when described first handoff threshold information comprises described first handoff threshold and described first thresholding protection range, determine the restriction relation met between described first handoff threshold, described first thresholding protection range and described second handoff threshold; Second determining unit, for determining described second handoff threshold according to described restriction relation.
Preferably, this device also comprises: sending module, and for the measurement configuration information that described second network element sends to terminal UE, wherein, described measurement configuration information comprises described second handoff threshold information.
According to also one side of the present invention, provide a kind of base station, this base station comprises the device described in above-mentioned any one.
In accordance with a further aspect of the present invention, provide a kind of radio network controller (RNC), this RNC comprises the device described in above-mentioned any one.
According to also another aspect of the present invention, provide a kind of base station controller BSC, this BSC comprises the device described in above-mentioned any one.
Pass through the present invention, the second network element is adopted to receive the first handoff threshold information of the first network element transmission, wherein, described first handoff threshold information comprises first handoff threshold of the first cell merge to the second community of described second network element and/or the first thresholding protection range of described first handoff threshold of described first network element; Described second network element determines the second handoff threshold information according to described first handoff threshold information; wherein; described second handoff threshold information comprises second handoff threshold of described second cell merge to described first community and/or the second thresholding protection range of described second handoff threshold; the UE solved in correlation technique switches existence and switches frequent failure; not only waste resource; and cause the service quality of UE to decline; affect the problem of Consumer's Experience; and then reach the unnecessary switching of minimizing; saving resource, improves the effect of the service quality of UE.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of the handoff threshold processing method according to the embodiment of the present invention;
Fig. 2 is the structured flowchart of the handoff threshold processing unit according to the embodiment of the present invention;
Fig. 3 is the preferred structure block diagram of determination module 24 in the handoff threshold processing unit according to the embodiment of the present invention;
Fig. 4 is the preferred structure block diagram of the handoff threshold processing unit according to the embodiment of the present invention;
Fig. 5 is the structured flowchart of the base station according to the embodiment of the present invention;
Fig. 6 is the structured flowchart of the radio network controller (RNC) according to the embodiment of the present invention;
Fig. 7 is the structured flowchart of the base station controller BSC according to the embodiment of the present invention;
Fig. 8 is the intersystem handover basic process schematic diagram according to the embodiment of the present invention;
Fig. 9 is the handoff threshold protection range schematic diagram according to the embodiment of the present invention;
Figure 10 is the employing RIM Message Transmission handoff threshold information schematic diagram according to the embodiment of the present invention.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
Provide a kind of handoff threshold processing method in the present embodiment, first, it is to be noted, first network element of the following stated, the second network element can be the multiple managed network elements in system, such as, can be base station in LTE system, can be radio network controller (RNC) in Universal Terrestrial wireless access network UTRAN system, can also be base station controller BSC in mobile radio telephone system GSM.Fig. 1 is the flow chart of the handoff threshold processing method according to the embodiment of the present invention, and as shown in Figure 1, this flow process comprises the steps:
Step S102, second network element receives the first handoff threshold information that the first network element sends, wherein, this first handoff threshold information comprises first handoff threshold of the first cell merge to the second community of the second network element and/or the first thresholding protection range of the first handoff threshold of the first network element;
Step S104, the second network element determines the second handoff threshold information according to the first handoff threshold information, and wherein, the second handoff threshold information comprises second handoff threshold of the second cell merge to the first community and/or the second thresholding protection range of the second handoff threshold.
Pass through above-mentioned steps, by handoff threshold information mutual between network element, thus can negotiation optimization thresholding, relative in correlation technique, after have modified handoff threshold, not with reference to amended handoff threshold between network element, cause handoff threshold when switching improper, cause pingpang handoff, not only waste resource, and have a strong impact on Consumer's Experience, between employing network element, handoff threshold is mutual, not only solve UE in correlation technique and switch the frequent failure of existence switching, cause the problem that the service quality of UE declines, and then reach the unnecessary switching of minimizing, saving resource, improve the effect of Consumer's Experience.
More preferably, before the second network element receives the first handoff threshold information of the first network element transmission, the first network element first can revise the first handoff threshold information, and the reason of amendment can be a lot, such as, can be modify according to the load of the first community and the second community; Also can be that the amendment configuration information issued according to network side is modified, certainly also may comprise other amendment reason, not illustrate one by one at this.Amended first handoff threshold message notice is given the second network element by the first network element, and this first handoff threshold information that namely the second network element receives is that the first network element is amended.Wherein, it should be noted that, the mode of notice can be different according to concrete condition difference, such as, can notifying according to the predetermined cycle, also can notify immediately when revising.
According to the difference of the information included by the first handoff threshold information, second network element also can be different according to the second handoff threshold that this first handoff threshold information is determined, such as, when this first handoff threshold information only comprises the first handoff threshold, this second network element can only make determines the second handoff threshold according to this first handoff threshold; Again such as, when the first handoff threshold information comprises the first handoff threshold and the first thresholding protection range, second network element can determine the second handoff threshold information in the following ways according to the first handoff threshold information: first, determines the restriction relation met between the first handoff threshold, the first thresholding protection range and the second handoff threshold; Determine the second handoff threshold according to restriction relation, specifically determine that form is different according to the difference of the parameter selected, can with reference to following preferred implementation.
It should be noted that, the mode of above-mentioned first handoff threshold statement can be multiple, such as, can be following one of at least: the signal quality lower limit thresholding M2 of the second community that terminal UE records, the signal quality upper limit thresholding M1 of the first community that UE records and the signal quality lower limit thresholding M2 of the second community, the lower limit thresholding M3 of the difference of the signal quality of the first community that UE records and the signal quality of the second community, wherein, above-mentioned M1, M2, M3 is the handoff threshold whether switched for triggering UE, such as, the handoff threshold of cell1 to cell2, refer to that node 1 adjudicates UE when being switched to cell2 from cell1, the lowest term of the signal quality demand fulfillment of cell1 and cell2 that UE measurement obtains.This handoff threshold can be that node 1 pre-sets, also can be according to cell1 and cell2 between switching statistics obtain, can also be obtained by the internal algorithm of node 1.
In addition, above-mentioned first handoff threshold information, the second handoff threshold information also can adopt multiple expression form, such as, can adopt the expression form of absolute value, and the form of relative value also can be adopted to state, and can certainly adopt the expression form that both combine.Moreover above-mentioned first thresholding protection range, the second thresholding protection range also can have various ways, such as, can for following one of at least: single numerical value, numerical value interval, comprise a maximum and a minimum value.Wherein, above-mentioned first thresholding protection range, the second thresholding protection range can obtain according to much information; such as, one of at least can obtain according to following information: cell signal quality information, the pingpang handoff statistical information of UE, the handover failure rate of UE, the pre-configure information of node that the history handover information of terminal UE, UE measure.
Preferably, after the second network element determines the second handoff threshold information according to the first handoff threshold information, also comprise: the second network element by above-mentioned second handoff threshold message notice to UE, accordingly, first network element also can by above-mentioned first handoff threshold message notice to UE, various ways can be adopted during notice, such as, can by sending the mode of configuration information, such as, the measurement configuration information (this measurement configuration information can be called the second measurement configuration information to distinguish) that second network element sends to UE, wherein, this second measurement configuration information comprises above-mentioned second handoff threshold information, accordingly, first network element also can send measurement configuration information (this measurement configuration information also can be called the first measurement configuration information equally) to terminal UE, wherein, this first measurement configuration information comprises above-mentioned first handoff threshold information, .
Additionally provide a kind of handoff threshold processing unit in the present embodiment, this device is used for realizing above-described embodiment and preferred implementation, has carried out repeating no more of explanation.As used below, term " module " can realize the software of predetermined function and/or the combination of hardware.Although the device described by following examples preferably realizes with software, hardware, or the realization of the combination of software and hardware also may and conceived.
Fig. 2 is the structured flowchart of the handoff threshold processing unit according to the embodiment of the present invention, and as shown in Figure 2, this device comprises receiver module 22 and determination module 24, is described below to this system.
Receiver module 22, the first handoff threshold information of the first network element transmission is received for the second network element, wherein, the first handoff threshold information comprises first handoff threshold of the first cell merge to the second community of the second network element and/or the first thresholding protection range of the first handoff threshold of the first network element; Determination module 24; be connected to above-mentioned receiver module 22; the second handoff threshold information is determined according to the first handoff threshold information for the second network element; wherein, the second handoff threshold information comprises second handoff threshold of the second cell merge to the first community and/or the second thresholding protection range of the second handoff threshold.
Fig. 3 is the preferred structure block diagram of determination module 24 in the handoff threshold processing unit according to the embodiment of the present invention, and as shown in Figure 3, this determination module 24 comprises the first determining unit 32 and the second determining unit 34, is described below to this determination module 24.
First determining unit 32, for when the first handoff threshold information comprises the first handoff threshold and the first thresholding protection range, determines the restriction relation met between the first handoff threshold, the first thresholding protection range and the second handoff threshold; Second determining unit 34, is connected to above-mentioned first determining unit 32, for determining the second handoff threshold according to restriction relation.
Fig. 4 is the preferred structure block diagram of the handoff threshold processing unit according to the embodiment of the present invention, and as shown in Figure 4, this device, except comprising all structures shown in Fig. 2, also comprises sending module 42, is described below to this preferred structure.
Sending module 44, for the measurement configuration information that the second network element sends to UE, wherein, this measurement configuration information comprises the second handoff threshold information.
Fig. 5 is the structured flowchart of the base station according to the embodiment of the present invention, and as shown in Figure 5, this base station 50 comprises the handoff threshold processing unit 52 described in above-mentioned any one.
Fig. 6 is the structured flowchart of the radio network controller (RNC) according to the embodiment of the present invention, and as shown in Figure 6, this radio network controller (RNC) 60 comprises the handoff threshold processing unit 52 described in above-mentioned any one.
Fig. 7 is the structured flowchart of the base station controller BSC according to the embodiment of the present invention, and as shown in Figure 7, this base station controller BSC 70 comprises the handoff threshold processing unit 52 described in above-mentioned any one.
For in correlation technique, when a system changes to the handoff threshold of different system, the handoff threshold of different system to native system is not made reference, cause the handoff threshold of minizone improper, thus the pingpang handoff of UE can be caused, namely UE can switch frequently between system, or cause unnecessary switching, namely UE is from after cell1 is switched to cell2, the signal quality of cell1 is still enough good, cause the wasting of resources of Target cell cell2, and handoff procedure can cause the Qos of UE to decline frequently, reduce the problem of Consumer's Experience, in the present embodiment, provide a kind of method that handoff threshold between system is optimized, to solve the pingpang handoff or unnecessary switching that cause due to the handoff parameter between system adjustment.
The optimization method of this intersystem handover thresholding comprises: network element 1 notifies the managed network element 2 of cell2 the handoff threshold of cell1 to the cell2 of amendment, managed network element 2, according to the handoff threshold of cell1 to the cell2 upgraded, optimizes the handoff threshold of cell2 to cell1.
Wherein, the handoff threshold of cell1 to cell2, can be expressed as following one of at least: the signal quality of cell2 is greater than thresholding M2, and the signal quality of cell2 is greater than thresholding M2 and the signal quality of cell1 is greater than thresholding M3 lower than the signal quality of thresholding M1, cell2 and the poor signal quality of cell1.
More preferably, the pingpang handoff caused to prevent signal jitter, each handoff threshold can also have a protection range H.Managed network element 2, according to the handoff threshold of cell1 to the cell2 upgraded and corresponding protection range H, optimizes the handoff threshold of cell2 to cell1.Wherein, the form of this protection range also can be multiple, and such as, can be a numerical value, can be an interval, or can be comprise a minimum value and maximum.
It should be noted that, between network element 1 and network element 2, above-mentioned handoff threshold information can be transmitted by multiple message, such as, this handoff threshold information can be transmitted by specific messages or the message of reusing handoff procedure.
After managed network element 1 and managed network element 2 revise handoff threshold, the measurement configuration can revising response is sent to UE, measures in configuration the thresholding can revised measurement event and trigger.
By above-described embodiment and preferred implementation, can handoff threshold information alternately between network element 1 and network element 2, thus can consult to revise the handoff threshold optimized, reduce pingpang handoff and unnecessary switching.
Below in conjunction with accompanying drawing, the preferred embodiment for the present invention is described.
Preferred embodiment one: handoff threshold information between transmission system, adopts absolute value form:
The cell1 of node 1 and the cell2 of node 2 adjacent area between system each other, the duty ratio of cell1 is higher, the load of cell2 is relatively low, for improving power system capacity, node 1 determines that triggering UE by amendment handoff threshold moves the load reducing cell1, makes cell portion load can be balanced in cell2, wherein, trigger the handoff threshold that UE carries out switching in the handoff algorithms of node 1, refer to and can trigger UE is switched to cell2 condition from cell1.Switching condition can be: the signal quality of the cell2 that the UE measurement in cell1 obtains is greater than thresholding M2, also can be that the signal quality of cell2 is greater than thresholding M2 and the signal quality of cell1 is greater than thresholding M3 lower than the signal quality of thresholding M1, cell2 and the poor signal quality of cell1.It is one or more that handoff threshold can comprise in above-mentioned three kinds of thresholdings.The handoff threshold of this cell1 to cell2, refers to that node 1 adjudicates UE when being switched to cell2 from cell1, the lowest term of the signal quality demand fulfillment of cell1 and cell2 that UE measurement obtains.This handoff threshold can be that node 1 pre-sets, also can be according to cell1 and cell2 between switching statistics obtain, can also be obtained by the internal algorithm of node 1.
Below above-mentioned three kinds of handoff thresholds are described respectively.
What suppose that handoff algorithms module in cell1 adopts is that the signal quality of cell2 is greater than the condition of thresholding M2 as the thresholding switched, so node 1 can by reducing the numerical value of M2, reduce the handoff threshold of cell1 to cell2, so can there is the UE on cell1 and cell2 border of greater number, its cell2 signal quality measured meets amended handoff threshold, therefore, node 1 can trigger more UE according to handoff algorithms and be switched in cell2, thus reduces the cell load of cell1.Fig. 8 is the intersystem handover basic process schematic diagram according to the embodiment of the present invention, and as shown in Figure 8, this switching comprises the steps:
Step S802, UE send measurement report to node 1;
Step S804, node 1 sends handover request to node 2;
Step S806, node 2 feeds back handoff response to node 1;
Step S808, node 1 sends switching command to UE;
Step S810, UE feed back switching to node 2 to be completed.
If the signal quality that the handoff threshold in cell1 being is cell2 be greater than thresholding M2 and the signal quality of cell1 lower than thresholding M1, the numerical value of M2 can be reduced or raise the numerical value of M1, or reduce the numerical value of M2 and the numerical value of rising M1 simultaneously, the result that the UE on cell1 and cell2 border that so can there is greater number measures meets the condition being switched to cell2, thus node 1 can trigger more UE according to handoff algorithms is switched in cell2, thus reduce the cell load of cell1.
If the signal quality of handoff threshold cell2 in cell1 being and the poor signal quality of cell1 are greater than thresholding M3, so node 1 can by reducing the numerical value of M3, the result that the UE on cell1 and cell2 border that so can there is greater number measures meets the condition being switched to cell2, thus node 1 can trigger more UE according to handoff algorithms is switched in cell2, thus reduce the cell load of cell1.
Node 1 the handoff threshold message notice of amended cell1 to cell2 to node 2, have in handoff threshold packets of information contains: thresholding M2: the signal quality of adjacent area is greater than thresholding M2 and triggers switching, thresholding M2 and thresholding M1: the signal quality of adjacent area is greater than thresholding M2 and the signal quality of this community triggers switching lower than thresholding M1, thresholding M3: the poor signal quality of the signal quality of adjacent area and this community is greater than thresholding M3 and triggers and switch, one or more in three kinds of thresholdings.It should be noted that, for each thresholding, can also contain a thresholding protection range, thresholding protection range is available to the node of opposite end as the reference arranging handoff threshold.Can to be node 1 provide according to information such as the switching behavior statistics of the history handover information of UE, cell signal quality that UE measures, UE thresholding protection range, or obtained by pre-configured.
Node 2 receives the handoff threshold information of cell1 to cell2, according to the protection range of the handoff threshold wherein comprised and thresholding, can determine the approximate range of the handoff threshold of community cell2 to cell1, to avoid the generation of pingpang handoff.Such as, the handoff threshold of cell1 to cell2 and cell2 to cell1 is all measure one of same community cell2 signal quality, and so the difference of the handoff threshold at two ends needs to be greater than this thresholding protection range, to prevent pingpang handoff.Illustrate below.
Such as, the handoff threshold of cell1 to cell2 be the signal quality of cell2 higher than X, protection range to be one of handoff threshold condition of Z, cell2 to cell1 be cell2 signal quality is lower than Y, then Y must be less than (X-Z).Therefore, node 2, when optimizing and revising thresholding Y, needs to consider the handoff threshold X of cell1 to cell2 and the value of protection range Z and restriction relation.
If the handoff threshold of cell1 to cell2 is that the poor signal quality of cell2 and cell1 is higher than X, protection range is Z, the handoff threshold condition of cell2 to cell1 be the poor signal quality of cell1 and cell2 higher than Y, demand fulfillment (X-Z)+Y>0; Just can ensure pingpang handoff to occur.Fig. 9 is the handoff threshold protection range schematic diagram according to the embodiment of the present invention, as shown in Figure 9.
Accordingly, also may arrange a thresholding protection range Z ' in node 2 to the handoff threshold of cell2 to cell1 in inside, node 2 can carry out merging treatment to these two thresholdings and obtain unique thresholding protection range; such as; can maximum be selected, or minimum value, or other processing schemes.Such as, the protection range Z ' of cell2 to the cell1 of protection range Z and the node 2 inside setting provided according to cell1 can be followed, the numerical value Z ' ' that the maximum of getting both adopts as final decision, so demand fulfillment (X-Z ' ')+Y>0; Just can ensure pingpang handoff to occur.
It should be noted that, above-mentioned protection range can be a numerical value, or an interval, or comprises a minimum value and maximum.Such as, Z can value be 2db, or an interval [2,4], or only comprises maximum and minimum value { 2,3}.
When transmitting handoff threshold and protection range before node 1 and node 2, can adopt various ways, such as, node 1 can notify node 2 by the message 1 between two nodes.Wherein, this message 1 can be handover request message, can be the message such as switching response message, also other message between system can be adopted to transmit, such as, wireless access network (Radio Access Network, referred to as RAN) message management (RAN Information Management, referred to as RIM) message, Figure 10 is the employing RIM Message Transmission handoff threshold information schematic diagram according to the embodiment of the present invention, as shown in Figure 10, the RIM message sent to node 2 at node 1 and node 2 send the handoff threshold protection range having included handoff threshold and/or correspondence in RIM message to node 1.It should be noted that, in described message 1, need the identification information containing cell1 and cell2.
After node 2 receives the message comprising handoff threshold information, can according to the protection range information of this handoff threshold and/or thresholding, the handoff threshold of adjustment cell2 to cell1, to prevent pingpang handoff.
More preferably, node 2 can also notify the thresholding of amended cell2 to the cell1 of node 1, can also contain the corresponding protection range of this thresholding.
If the handoff threshold of handoff threshold cell2 to cell1 meets switch protecting scope, or other reasons, node 2 judges the handoff threshold need not revising cell2 to cell1, then can send a message to node 1.
Node 1 also once can revise the handoff threshold of multiple administered community to the community of node 2, and the handoff threshold message notice of multiple community to peer node 2.
Node 2 according to amended handoff threshold, can be revised to the Survey control configuration under UE, can revise the triggering thresholding of wherein measurement event, such as, in UMTS system, 3A and 3C event thresholds, B1 and the B2 event thresholds in LTE system.
Preferred embodiment two: handoff threshold information between transmission system, adopts relative value form:
The cell1 of node 1 and the cell2 of node 2 adjacent area between system each other, the duty ratio of cell1 is higher, the load of cell2 is relatively low, for improving power system capacity, node 1 determines that triggering UE by amendment handoff threshold moves the load reducing cell1, makes cell portion load can be balanced in cell2, wherein, trigger the handoff threshold that UE carries out switching in node 1 in handoff algorithms, refer to and can trigger UE is switched to cell2 condition from cell1.Switching condition can be: the signal quality of the cell2 that the UE measurement in cell1 obtains is greater than thresholding M2, the signal quality of cell2 is greater than thresholding M2 and the signal quality of cell1 is greater than thresholding M3 lower than the signal quality of thresholding M1, cell2 and the poor signal quality of cell1.It is one or more that handoff threshold can comprise in above-mentioned three kinds of thresholdings.The handoff threshold of this cell1 to cell2, refers to that node 1 adjudicates UE when being switched to cell2 from cell1, the lowest term of the signal quality demand fulfillment of cell1 and cell2 that UE measurement obtains.This handoff threshold can be that node 1 pre-sets, also can be according to cell1 and cell2 between switching statistics obtain, can also be obtained by the internal algorithm of node 1.
Illustrate below.
What suppose that handoff algorithms module in cell1 adopts is that the signal quality of cell2 is greater than the condition of thresholding M2 as the thresholding switched, so node 1 can by reducing the numerical value of M2, reduce the handoff threshold of cell1 to cell2, so can there is the UE on cell1 and cell2 border of greater number, its cell2 signal quality measured meets amended handoff threshold, therefore, node 1 can trigger more UE according to handoff algorithms and be switched in cell2, thus reduces the cell load of cell1.
If the signal quality that the handoff threshold in cell1 being is cell2 be greater than thresholding M2 and the signal quality of cell1 lower than thresholding M1, the numerical value of M2 can be reduced or raise the numerical value of M1, or reduce the numerical value of M2 and the numerical value of rising M1 simultaneously, the result that the UE on cell1 and cell2 border that so can there is greater number measures meets the condition being switched to cell2, thus node 1 can trigger more UE according to handoff algorithms is switched in cell2, thus reduce the cell load of cell1.
If the signal quality of handoff threshold cell2 in cell1 being and the poor signal quality of cell1 are greater than thresholding M3, so node 1 can by reducing the numerical value of M3, the result that the UE on cell1 and cell2 border that so can there is greater number measures meets the condition being switched to cell2, thus node 1 can trigger more UE according to handoff algorithms is switched in cell2, thus reduce the cell load of cell1.
Node 1 the handoff threshold message notice of amended cell1 to cell2 to node 2, have in handoff threshold packets of information contains: the knots modification of handoff threshold, handoff threshold refers to: thresholding M2: the signal quality of adjacent area is greater than thresholding M2 and triggers switching, thresholding M2 and thresholding M1: the signal quality of adjacent area is greater than thresholding M2 and the signal quality of this community triggers switching lower than thresholding M1, thresholding M3: the poor signal quality of the signal quality of adjacent area and this community is greater than thresholding M3 and triggers and switch, one or more in three kinds of thresholdings.Knots modification refers to the knots modification of relatively original thresholding.More preferably, for each thresholding, can also contain a thresholding protection range, thresholding protection range is available to the node of opposite end as the reference arranging handoff threshold.Can to be node 1 provide according to information such as the switching behavior statistics of the history handover information of UE, cell signal quality that UE measures, UE thresholding protection range, or obtained by pre-configured.
Node 2 receives the handoff threshold information of cell1 to cell2, according to the knots modification of the handoff threshold wherein comprised and the protection range of thresholding, can determine the approximate range of the handoff threshold of community cell2 to cell1, to avoid the generation of pingpang handoff.Such as, the handoff threshold of cell1 to cell2 and cell2 to cell1 is all measure one of same community cell2 signal quality, and so the difference of the handoff threshold at two ends needs to be greater than this thresholding protection range, to prevent pingpang handoff.
Such as, the handoff threshold of cell1 to cell2 be the signal quality of cell2 higher than X, protection range to be one of handoff threshold condition of Z, cell2 to cell1 be cell2 signal quality is lower than Y, then Y must be less than (X-Z).Therefore, node 2, when optimizing and revising thresholding Y, needs to consider the handoff threshold X of cell1 to cell2 and the value of protection range Z and restriction relation.
If the handoff threshold of cell1 to cell2 is that the poor signal quality of cell2 and cell1 is higher than X, protection range is Z, the handoff threshold condition of cell2 to cell1 be the poor signal quality of cell1 and cell2 higher than Y, demand fulfillment (X-Z)+Y>0; Just can ensure pingpang handoff to occur.As shown in Figure 9 above.
More preferably, also may arrange a thresholding protection range Z ' in node 2 to the handoff threshold of cell2 to cell1 in inside, node 2 can carry out merging treatment to these two thresholdings and obtain unique thresholding protection range; such as; can maximum be selected, or minimum value, or other processing schemes.Such as, the protection range Z ' of cell2 to the cell1 of protection range Z and the node 2 inside setting provided according to cell1 can be followed, the numerical value Z ' ' that the maximum of getting both adopts as final decision, so demand fulfillment (X-Z ' ')+Y>0; Just can ensure pingpang handoff to occur.It should be noted that, this protection range can be a numerical value, or an interval, or comprises a minimum value and maximum.Such as, Z can value be 2db, or an interval [2,4], or only comprises maximum and minimum value { 2,3}.
When transmitting handoff threshold and protection range before node 1 and node 2, can adopt various ways, such as, node 1 can notify node 2 by the message 1 between two nodes.Wherein, this message 1 can be handover request message, the message such as switching response message.Also can adopt the specific messages between system to transmit, such as, RIM message, as shown in Figure 10.In above-mentioned message 1, need the identification information containing cell1 and cell2.
After node 2 receives the message comprising handoff threshold information, can according to the protection range information of the knots modification information of handoff threshold and/or thresholding, the handoff threshold of adjustment cell2 to cell1, to prevent pingpang handoff.
Preferably, node 2 can also notify the thresholding knots modification of node 1cell2 to cell1, can also contain the corresponding protection range of thresholding.
It should be noted that, if the handoff threshold of handoff threshold cell1 to cell2 meets switch protecting scope, then node 2 need not revise handoff threshold according to reality.Peer node 1 can be notified.
More preferably, node 1 also once can revise the handoff threshold of multiple administered community to the community of node 2, and the handoff threshold message notice of multiple community to peer node 2.
Node 2 according to amended handoff threshold, can be revised to the Survey control configuration under UE, can revise the triggering thresholding of wherein measurement event, such as, in UMTS system, 3A and 3C event thresholds, B1 and the B2 event thresholds in LTE system.
Preferred embodiment three: protection range information between transmission system:
The cell1 of node 1 and the cell2 of node 2 adjacent area between system each other, the duty ratio of cell1 is higher, the load of cell2 is relatively low, for improving power system capacity, node 1 determines that triggering UE by amendment handoff threshold moves the load reducing cell1, makes cell portion load can be balanced in cell2, wherein, trigger the handoff threshold that UE carries out switching in node 1 in handoff algorithms, refer to and trigger UE is switched to cell2 condition from cell1.Switching condition can be: in the cell signal quality that UE measures, the signal quality of cell2 is greater than thresholding M2, the signal quality of cell2 is greater than thresholding M2 and the signal quality of cell1 is greater than thresholding M3 lower than the signal quality of thresholding M1, cell2 and the poor signal quality of cell1.What comprise in above-mentioned three kinds of thresholdings is one or more.The handoff threshold of this cell1 to cell2, refers to that node 1 adjudicates UE when being switched to cell2 from cell1, the lowest term of the signal quality demand fulfillment of cell1 and cell2 that UE measurement obtains.This handoff threshold can be that node 1 pre-sets, also can be according to cell1 and cell2 between switching statistics obtain, can also be obtained by the internal algorithm of node 1.
Illustrate below.
What suppose that handoff algorithms module in cell1 adopts is that the signal quality of cell2 is greater than the condition of thresholding M2 as the thresholding switched, so node 1 can by reducing the numerical value of M2, reduce the handoff threshold of cell1 to cell2, so can there is the UE on cell1 and cell2 border of greater number, its cell2 signal quality measured meets amended handoff threshold, therefore, node 1 can trigger more UE according to handoff algorithms and be switched in cell2, thus reduces the cell load of cell1.Handoff procedure as shown in Figure 8.
If the signal quality that the handoff threshold in cell1 being is cell2 be greater than thresholding M2 and the signal quality of cell1 lower than thresholding M1, the numerical value of M2 can be reduced or raise the numerical value of M1, or reduce the numerical value of M2 and the numerical value of rising M1 simultaneously, the result that the UE on cell1 and cell2 border that so can there is greater number measures meets the condition being switched to cell2, thus node 1 can trigger more UE according to handoff algorithms is switched in cell2, thus reduce the cell load of cell1.
If the signal quality of handoff threshold cell2 in cell1 being and the poor signal quality of cell1 are greater than thresholding M3, so node 1 can by reducing the numerical value of M3, the result that the UE on cell1 and cell2 border that so can there is greater number measures meets the condition being switched to cell2, thus node 1 can trigger more UE according to handoff algorithms is switched in cell2, thus reduce the cell load of cell1.
For each thresholding, can also contain a thresholding protection range, thresholding protection range is available to the node of opposite end as the reference arranging handoff threshold.The thresholding protection range statistical information such as cell signal quality, handover failure rate, pingpang handoff number of times that can be node 1 measure according to UE history handover information, UE provides, or obtained by pre-configured.Whether node 1 is adjudicated by algorithm according to described statistical information needs amendment thresholding protection range.
If node 1 needs by algorithmic decision the protection range revising corresponding thresholding; then node 1 is the handoff threshold protection range message notice of amended cell1 to cell2 to node 2, has in handoff threshold protection range packets of information contains: the up-to-date value of thresholding protection range or the knots modification of thresholding protection range on initial value basis.Preferably, can also containing concrete threshold information, the handoff threshold that namely this protection range is corresponding or threshold type.Handoff threshold comprises: thresholding M2: the signal quality of adjacent area is greater than thresholding M2 and triggers switching, thresholding M2 and thresholding M1: the signal quality of adjacent area is greater than thresholding M2 and the signal quality of this community triggers switching lower than thresholding M1, thresholding M3: the poor signal quality of the signal quality of adjacent area and this community is greater than thresholding M3 and triggers and switch, one or more in three kinds of thresholdings.Threshold type can be expressed as the signal quality thresholding for adjacent area, the signal quality thresholding for this community, thresholding for the poor signal quality of adjacent area and this community.
Node 2 receives the handoff threshold protection range information of cell1 to cell2, according to protection range and/or the handoff threshold of the thresholding wherein comprised, can determine the approximate range of the handoff threshold of community cell2 to cell1, to avoid the generation of pingpang handoff.Such as, the handoff threshold of cell1 to cell2 and cell2 to cell1 is all measure one of same community cell2 signal quality, and so the difference of the handoff threshold at two ends needs to be greater than this thresholding protection range, to prevent pingpang handoff.
Such as, the handoff threshold of cell1 to cell2 be the signal quality of cell2 higher than X, protection range to be one of handoff threshold condition of Z, cell2 to cell1 be cell2 signal quality is lower than Y, then Y must be less than (X-Z).Therefore, node 2, when optimizing and revising thresholding Y, needs to consider the handoff threshold X of cell1 to cell2 and the value of protection range Z and restriction relation.
If the handoff threshold of cell1 to cell2 is that the poor signal quality of cell2 and cell1 is higher than X, protection range is Z, the handoff threshold condition of cell2 to cell1 be the poor signal quality of cell1 and cell2 higher than Y, demand fulfillment (X-Z)+Y>0; Just can ensure pingpang handoff to occur.As shown in Figure 9.
To the handoff threshold of cell2 to cell1, a thresholding protection range Z ' also may be set in inside in node 2; node 2 can carry out merging treatment to these two thresholdings and obtain unique thresholding protection range, such as, can select maximum; or minimum value, or other processing schemes.Such as, the protection range Z ' of cell2 to the cell1 of protection range Z and the node 2 inside setting provided according to cell1 can be followed, the numerical value Z ' ' that the maximum of getting both adopts as final decision, so demand fulfillment (X-Z ' ')+Y>0; Just can ensure pingpang handoff to occur.
It should be noted that, above-mentioned protection range can be a numerical value, or an interval, or comprises a minimum value and maximum.Such as, Z can value be 2db, or an interval [2,4], or only comprises maximum and minimum value { 2,3}.
When transmitting handoff threshold and protection range before node 1 and node 2, can adopt various ways, such as, node 1 can notify node 2 by the message 1 between two nodes.Wherein, this message 1 can be handover request message, the message such as switching response message.Also can adopt the specific messages between system to transmit, such as, RIM message, as shown in Figure 10.In above-mentioned message 1, need the identification information containing cell1 and cell2.
After node 2 receives the message comprising handoff threshold information, can according to the protection range information of the knots modification information of above-mentioned handoff threshold and/or thresholding, the handoff threshold of adjustment cell2 to cell1, to prevent pingpang handoff.
More preferably, node 2 can also notify the thresholding knots modification of node 1cell2 to cell1, can also contain the corresponding protection range of thresholding.
Preferably, if the handoff threshold of handoff threshold cell1 to cell2 meets switch protecting scope, then node 2 need not revise handoff threshold according to reality.Peer node 1 can be notified.
It is pointed out that node 1 also once can revise the handoff threshold of multiple administered community to the community of node 2, and the handoff threshold message notice of multiple community to peer node 2.
Node 2 according to amended handoff threshold, can be revised to the Survey control configuration under UE, can revise the triggering thresholding of wherein measurement event, such as, in UMTS system, 3A and 3C event thresholds, B1 and the B2 event thresholds in LTE system.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. a handoff threshold processing method, is characterized in that, comprising:
Second network element receives the first handoff threshold information that the first network element sends, wherein, described first handoff threshold information comprises first handoff threshold of the first cell merge to the second community of described second network element and/or the first thresholding protection range of described first handoff threshold of described first network element;
Described second network element determines the second handoff threshold information according to described first handoff threshold information; wherein, described second handoff threshold information comprises second handoff threshold of described second cell merge to described first community and/or the second thresholding protection range of described second handoff threshold.
2. method according to claim 1; it is characterized in that; when described first handoff threshold information comprises described first handoff threshold and described first thresholding protection range, according to described first handoff threshold information, described second network element determines that described second handoff threshold information comprises:
Determine the restriction relation met between described first handoff threshold, described first thresholding protection range and described second handoff threshold;
Described second handoff threshold is determined according to described restriction relation.
3. method according to claim 1, is characterized in that, described first handoff threshold comprise following one of at least:
The lower limit thresholding M3 of the difference of the signal quality of described first community that the signal quality upper limit thresholding M1 of described first community that the signal quality lower limit thresholding M2 of described second community that terminal UE records, described UE record and the signal quality lower limit thresholding M2 of described second community, described UE record and the signal quality of described second community.
4. method according to claim 1, is characterized in that, described first thresholding protection range, described second thresholding protection range be following one of at least:
Single numerical value, numerical value interval, comprise a maximum and a minimum value.
5. method according to claim 1, is characterized in that, described first handoff threshold information, described second handoff threshold information adopt the form statement of absolute value and/or relative value.
6. method according to claim 1, is characterized in that, described first thresholding protection range, described second thresholding protection range one of at least obtain according to following information:
Cell signal quality information, the pingpang handoff statistical information of described UE, the handover failure rate of described UE, the pre-configure information of node that the history handover information of terminal UE, described UE measure.
7. method according to any one of claim 1 to 6, is characterized in that, after described second network element determines the second handoff threshold information according to described first handoff threshold information, also comprises:
Described second network element sends measurement configuration information to terminal UE, and wherein, described measurement configuration information comprises described second handoff threshold information.
8. a handoff threshold processing unit, is characterized in that, comprising:
Receiver module, the first handoff threshold information of the first network element transmission is received for the second network element, wherein, described first handoff threshold information comprises first handoff threshold of the first cell merge to the second community of described second network element and/or the first thresholding protection range of described first handoff threshold of described first network element;
Determination module; the second handoff threshold information is determined according to described first handoff threshold information for described second network element; wherein, described second handoff threshold information comprises second handoff threshold of described second cell merge to described first community and/or the second thresholding protection range of described second handoff threshold.
9. device according to claim 8, is characterized in that, described determination module comprises:
First determining unit, for when described first handoff threshold information comprises described first handoff threshold and described first thresholding protection range, determine the restriction relation met between described first handoff threshold, described first thresholding protection range and described second handoff threshold;
Second determining unit, for determining described second handoff threshold according to described restriction relation.
10. the device according to any one of according to Claim 8 to 9, is characterized in that, also comprises:
Sending module, sends measurement configuration information for described second network element to terminal UE, and wherein, described measurement configuration information comprises described second handoff threshold information.
11. 1 kinds of base stations, is characterized in that, comprise the device according to any one of claim 8 to 10.
12. 1 kinds of radio network controller (RNC)s, is characterized in that, comprise the device according to any one of claim 8 to 10.
13. 1 kinds of base station controller BSC, is characterized in that, comprise the device according to any one of claim 8 to 10.
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| PCT/CN2014/076881 WO2014183575A1 (en) | 2013-08-06 | 2014-05-06 | Handover threshold processing method, apparatus, base station, rnc, and bsc |
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