CN101998514B - Method and controller for balancing load among cells of multiband time division-synchronous code division multiple access (TD-SCDMA) system - Google Patents
Method and controller for balancing load among cells of multiband time division-synchronous code division multiple access (TD-SCDMA) system Download PDFInfo
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Abstract
The invention discloses a method and controller for balancing load among cells of a multiband time division-synchronous code division multiple access (TD-SCDMA) system. The method comprises the following steps: acquiring a balanced candidate cell list according to an intrasystem cell adjacent to a cell in which a terminal is currently stayed; determining the actual frequency band priority level, hierarchical cell structure (HCS) priority level and load priority level of each cell; acquiring the total priority level weight of each cell; sequencing all the cells in the intrasystem balanced candidate cell list; and enabling each cell to carry out an acceptance operation. The controller comprises an intrasystem balanced candidate cell list acquisition module, a priority level determination module connected with the intrasystem balanced candidate cell list acquisition module, a total priority level weight determination module connected with the priority level determination module, a cell sequencing module connected with the total priority level weight determination module and an acceptance module connected with the cell sequencing module, thus the invention ensures that the purpose of balancing load among cells which are in different frequency bands and have different HCS layers is realized.
Description
Technical field
The present invention relates to synchronous code division multiple access (TimeDivision-Synchronous Code Division Multiple Access of time-division in wireless communication field, be called for short TD-SCDMA) system, relate in particular to load equalization method and the controller of introducing minizone after multiband in TD-SCDMA.
Background technology
Along with the continuous expansion of network size and the continuous lifting of time-division (TD) number of users, originally can not satisfy the demand of capacity based on the residential quarter covering of B frequency range.Distribute to three frequency ranges that have of TDD (time-division numeral duplex) system according to the domestic preparation of planning, comprising: A frequency range 1880-1920MHz, B frequency range 2010-2025MHz, C frequency range 2300-2400MHz.
What wherein using at present is the B frequency range, altogether 15MHz bandwidth, namely 9 carrier waves; Outdoor grand station owner will use 3 carrier waves, and remaining 6 carrier wave is used at Microcell and indoor station.Next stage is enabled the A frequency range at once, and because there are conflict in A frequency range and Personal Handyphone System system (PHS:Personal HandyphoneSystem), planning at present allows the PHS system progressively abdicate this frequency range in several years of future.During this period, TD can mainly be used for indoor covering with the A frequency range, also can be used for outdoor cover in the place that there is no the PHS system interference.Temporarily do not enable the C frequency range.
Along with the introducing of A frequency range, phase I A frequency range is mainly used in indoor, part originally was used for indoor B frequency range carrier wave allows out gradually to outdoor grand station use; Be indoor use A frequency range+B frequency range, outdoor application B frequency range.The indoor use A frequency range of second stage+B frequency range, outdoor application A frequency range+B frequency range.So just have the residential quarter corresponding from different frequency range types, if consider the mixed networking of A frequency range and B frequency range, may have the residential quarter of three types: A frequency range residential quarter, only support the residential quarter of A frequency range; The residential quarter of B frequency range is only supported in B frequency range residential quarter; A+B frequency range residential quarter is supported the residential quarter of A frequency range and B frequency range simultaneously.If simultaneously the C frequency range is taken into account, have more cell type combination.Therefore, also there is different type combination for terminal, only supports the terminal of B frequency range and support simultaneously the A frequency range and the terminal of B frequency range; But only support the terminal of A frequency range can not exist within the long duration.
At the initial stage of A band networking, because original terminal is not supported the A frequency range, make terminal mostly choose the residential quarter of B frequency range, the load between A frequency range and B frequency range residential quarter just can not all be carried on a shoulder pole.Even in the later stage of A band networking, support the terminal of A frequency range to increase gradually, operator also can according to different scenes, wish that terminal preferentially is carried on the residential quarter of certain frequency range.
Except the factor of frequency range, also need to consider the factor of layered cell structure (HierarchicalCell Structure, be called for short HCS) under some scene, for the scene of supporting concurrent heating, preferred HCS priority ratio higher residential quarter; Under supporting the scene of translational speed and the translational speed of judgement terminal when being fast, preferred HCS priority ratio lower residential quarter.Except the factor of frequency range, HCS, whether the remaining hardware resources in residential quarter is directly connected to admittance successful, is the key factor of considering minizone load balancing.
For the load balancing between the residential quarter of the residential quarter of realizing different frequency range, different HCS hierarchical structures, avoid occurring individual cells because of the higher large tracts of land call drop that causes of load, or the super busy and appearance of the super not busy situation in A frequency range residential quarter in B frequency range residential quarter, the robustness of raising system, the measure that is necessary to introduce load balancing is with the performance that reaches the raising system and the purpose that increases the capacity of system.Except the load balancing in taking into account system, also want the load balancing between taking into account system; When the 3G system loading is high, can consider the system bearing by 2G for speech business; Satisfying under specific condition for some data service, can be carried to the 2G system.
The factor of evaluation of cell load mainly comprises: up/down row code resource, uplink interference (RTWP) and descending power.Because the TD system is the system of a multifrequency point, multi-slot, uplink interference is relevant to concrete time slot and frequency with descending power, and the load that how reasonably to define the residential quarter is very crucial.
Prior art is only considered load or HCS factor when considering the load balancing of minizone, do not consider simultaneously that several factors are on the impact of minizone load balancing; For the equilibrium between the multiband residential quarter, prior art is mainly by after service access, and the load difference between the judgement different frequency range is selected multiband terminal to be redirected to realize; And during load balancing, do not consider the load condition of different system cell between taking into account system.After introducing multiband and HCS hierarchical structure, how to consider the factors such as frequency range, HCS, load, make whole system load balancing between the residential quarter of different frequency ranges, different HCS hierarchical structure become a new problem.
Summary of the invention
Technical problem to be solved by this invention is to provide load equalization method and the system between a kind of multiband TD-SCDMA system block, only consider load or HCS factor in prior art to solve, and do not consider the problem of factors such as frequency range, HCS, load etc.
In order to solve the problems of the technologies described above, the invention provides the load equalization method between a kind of multiband TD-SCDMA system block, the method comprises the following steps:
After radio network controller receives the wireless resource control connection request message or request for radio bearer assignment message that terminal initiates, according to adjacent cell in the system of the current persistent district of described terminal, balanced candidate cell list in the acquisition system;
Thresholding balanced according to the frequency range priority that each residential quarter in balanced candidate cell list in described system is set in advance, layered cell structure priority and system's internal loading determined frequency range priority, the layered cell structure priority of the reality of described each residential quarter and the priority of loading;
According to the frequency range priority weighting that each residential quarter in balanced candidate cell list in described system is set in advance, layered cell structure priority weighting and load priority weighting, and the frequency range priority of the reality of described each residential quarter of determining, layered cell structure priority and load priority, obtain total priority weighting of described each residential quarter;
According to total priority weighting of described each residential quarter, sorted in all residential quarters in balanced candidate cell list in described system; With
Each residential quarter in balanced candidate cell list in described system after sequence is carried out admit operation.
In described system, adjacent cell comprises that the current persistent district of described terminal is with adjacent cell in the system of covering and inclusion relation.
The frequency range priority of the reality of described each residential quarter is determined according to following mode:
Each residential quarter in described system in balanced candidate cell list only comprises a kind of carrier frequency of frequency range, with the frequency range priority of described this frequency range priority that sets in advance as the reality of this each residential quarter; Perhaps
Each residential quarter in described system in balanced candidate cell list comprises the carrier frequency of multiple frequency range, and in all frequency range priority that set in advance, the highest priority is as the frequency range priority of the reality of this each residential quarter.
The layered cell structure priority of the reality of described each residential quarter is determined according to following mode:
Judging whether current area supports layered cell structure, if current area is not supported described layered cell structure, is that the priority of the same current area that covers of current persistent district of described terminal is set to 1; For the priority of the current area of the current persistent district inclusion relation of described terminal is set to 0; If current area is supported described layered cell structure, with the layered cell structure priority of the described layered cell structure priority that sets in advance as the reality of described each residential quarter.
The load priority of the reality of described each residential quarter is determined according to following mode:
The load of described each residential quarter is compared with the described balanced thresholding of system's internal loading that sets in advance, be set to limit priority than the little maximum current area of the balanced thresholding of described system internal loading; Be set to lowest priority than the large maximum current area of the balanced thresholding of described system internal loading.
Described sequence is descending from high to low.
Described to after in the described system after sequence, failure is admitted in each residential quarter in balanced candidate cell list, load balancing process between executive system.
Between described system, the load balancing process comprises:
According to adjacent cell between the system of the current persistent district of described terminal, balanced candidate cell list between the acquisition system;
According to load balancing thresholding between the system that sets in advance, get rid of between described system balanced candidate cell list small area load greater than the residential quarter of load balancing thresholding between the described system that sets in advance; With
Select the candidate cell of the described current persistent district of conduct that between described system, balanced candidate cell list small area load is the lightest, carry out reorientating or gravity treatment between system.
Between described system, the load of balanced candidate cell list small area obtains by the Iur-g interface.
The present invention also provides the device of the Load balanced control between a kind of multiband TD-SCDMA system block, and this controller comprises:
Balanced candidate cell list acquisition module in system, after being used for the wireless resource control connection request message or request for radio bearer assignment message of receiving terminal initiation, according to adjacent cell in the system of the current persistent district of described terminal, balanced candidate cell list in the acquisition system;
The priority determination module, be connected with balanced candidate cell list acquisition module in described system, be used for thresholding balanced according to the frequency range priority that each residential quarter of balanced candidate cell list in described system is set in advance, layered cell structure priority and system's internal loading, determine frequency range priority, layered cell structure priority and the load priority of the reality of described each residential quarter;
Total priority weighting determination module, be connected with described priority determination module, be used for according to the frequency range priority weighting that each residential quarter of balanced candidate cell list in described system is set in advance, layered cell structure priority weighting and load priority weighting, and the frequency range priority of the reality of described each residential quarter of determining, layered cell structure priority and load priority, obtain total priority weighting of described each residential quarter;
The residential quarter order module is connected with described total priority weighting determination module, is used for according to total priority weighting of described each residential quarter, being sorted in all residential quarters of balanced candidate cell list in described system; With
Admit module, be connected with described residential quarter order module, be used for each residential quarter of balanced candidate cell list in the described system after sequence is admitted.
Load balanced control device between described multiband TD-SCDMA system block also comprises:
Balance module between system is connected with described admittance module, is used for according to adjacent cell between the system of the current persistent district of described terminal balanced candidate cell list between the acquisition system; According to load balancing thresholding between the system that sets in advance, get rid of between described system balanced candidate cell list small area load greater than the residential quarter of load balancing thresholding between the described system that sets in advance; And select the candidate cell of the described current persistent district of conduct that between described system, balanced candidate cell list small area load is the lightest, carry out reorientating between system.
The present invention also provides the load balance control method between a kind of multiband TD-SCDMA system block, comprise: after wireless resource control connection request message or request for radio bearer assignment message that receiving terminal is initiated, executive system internal loading balancing procedure, this process comprises:
According to adjacent cell in the system of the current persistent district of described terminal, balanced candidate cell list in the acquisition system;
Thresholding balanced according to the frequency range priority that each residential quarter in balanced candidate cell list in described system is set in advance, layered cell structure priority and system's internal loading determined frequency range priority, the layered cell structure priority of the reality of described each residential quarter and the priority of loading;
According to the frequency range priority weighting that each residential quarter in balanced candidate cell list in described system is set in advance, layered cell structure priority weighting and load priority weighting, and the frequency range priority of the reality of described each residential quarter of determining, layered cell structure priority and load priority, obtain total priority weighting of described each residential quarter;
According to total priority weighting of described each residential quarter, sorted in all residential quarters in balanced candidate cell list in described system; With
Each residential quarter in balanced candidate cell list in described system after sequence is admitted;
If in the system that produces in balanced candidate cell list each residential quarter admit unsuccessfully, load balancing process between executive system;
If between system, the load balancing process does not obtain balanced candidate cell list between system, or balanced candidate cell reorientation flow process failure between the system that obtains, the congestion control process of the current persistent district of the described terminal of execution.
Therefore, the present invention is by selecting the residential quarter of total priority weighting value maximum of the residential quarter of a many factors such as load that considers frequency range, cell layer aggregated(particle) structure, residential quarter for terminal in the adjacent area of the same coverage cell of current persistent district or inclusion relation, thereby the business that reaches is the equal purpose of load of load between the residential quarter of different frequency ranges, different HCS layer, improves stability and the robustness of whole system.
Description of drawings
Fig. 1 is the load equalization method that the present invention proposes between a kind of multiband TD-SCDMA system block;
Fig. 2 is the flow chart that comprises the load equalization method embodiment 1 between multiband TD-SCDMA system block of the present invention;
Fig. 3 is the flow chart that comprises the load equalization method embodiment 2 between multiband TD-SCDMA system block of the present invention.
Embodiment
Below by drawings and Examples, the technical scheme of the embodiment of the present invention is described in further detail.
After introducing multiband in the TD-SCDMA system, load balancing factor in minizone also will be considered the factor of frequency range except the factor of considering load, HCS; The present invention proposes the load equalization method between a kind of multiband TD-SCDMA system block, can comprise as shown in Figure 1 three processes, one is the balanced flow process of system's internal loading, it two is, if in the system that produces, failure is all admitted in the candidate cell list, also to carry out load balancing flow process between system; It three is, if between system, the load balancing flow process does not obtain the candidate cell list, or candidate cell reorientation flow process failure between the system that obtains, also to initiate the congestion control flow process of former residential quarter.As shown in Figure 1, be the flow chart of the load equalization method between multiband TD-SCDMA system block of the present invention, the method for employing is as follows:
It is mainly when receiving that when radio network controller (Radio Network Controller) wireless resource control connection request (RRCCONNECTION REQUEST) message or RAB distribute request (RABASSIGNMENT REQUEST) message that load between different frequency range, different HCS hierarchical structures residential quarter is all carried on a shoulder pole, for terminal is selected a residential quarter that considers the total weight maximum in residential quarter that frequency range, HCS, load factor obtain to attempt admitting to complete.If in system, balanced not success, start load balancing flow process between system, and adjacent area between the system that in the load balancing flow process, introducing Iur-g interface selection load is the lightest between system.Can effectively avoid the individual cells traffic overload like this, to guarantee Systems balanth and robustness.
The below introduces the load equalization method between multiband TD-SCDMA system block of the present invention in detail, concrete implementing procedure as shown in Figures 2 and 3, be illustrated in figure 2 as the flow chart of the load equalization method embodiment 1 that comprises between multiband TD-SCDMA system block of the present invention, comprise the steps:
Step S100: wireless resource control connection request (the RRC CONNECTION REQUEST) message that radio network controller (RNC) receiving terminal is initiated or RAB distribute request (RAB ASSIGNMENT REQUEST) message, after receiving message, reason, Traffic Channel, the business that will preserve RRC connection foundation switch to the ability of gsm system and the related cells such as ability of terminal;
Step S101: judge whether terminal satisfies system's internal loading equilibrium condition, comprise whether equalizer switch in corresponding system is opened and terminal current resident residential quarter whether have with cover and the system of inclusion relation in the adjacent area, balanced candidate cell list in the acquisition system; Wherein in the system of inclusion relation, the adjacent area refers to that coverage is larger than current persistent district, and coverage comprises time-division (TD) adjacent area of current persistent district fully; Relation between the adjacent area is specifically configured by the radio network controller network management interface;
Step S102: if balanced load equilibrium condition in discontented pedal system is returned to empty candidate cell list, and turned step S120;
Step S103: if satisfy balanced load equilibrium condition in system, obtain the candidate cell list by adjacent area in the system of the same covering of the current persistent district of terminal or inclusion relation;
Step S104: support situation according to the frequency range of terminal, get rid of the residential quarter that the frequency range ability of terminal in balanced candidate cell list is not supported.To wireless resource control connection request message, the frequency range of the support of terminal acquiescence is the frequency range of current persistent district; To the RAB allocation request message, the Radio Resource control connection that the frequency range ability of terminal is issued radio network controller before the terminal is set up and is completed that (RRCCONNECTION SETUP COMPLETE) message, this cell of " radio band " (Radio frequencybands) obtains; Radio network controller is preserved the content of this cell, and the span of " radio band " cell is: 0,1,2,3,4,5,6; Wherein 0 GC group connector is supported the A frequency range, and the B frequency range is supported in 1 representative, and the C frequency range is supported in 2 representatives, and the A+B frequency range is supported in 3 representatives, and the A+C frequency range is supported in 4 representatives, and the B+C frequency range is supported in 5 representatives, and the A+B+C frequency range is supported in 6 representatives.For example, the value of " radio band " cell is 3, illustrates that terminal supports A, B frequency range simultaneously.
Step S105: the frequency range priority weighting of each residential quarter balanced candidate cell list in the radio network controller webmaster obtains the system that sets in advance, and judge whether the frequency range priority weighting of residential quarter is zero; As be zero, execution in step S107;
Step S106: the frequency range priority of the frequency range priority pre-configured according to the radio network controller webmaster of each residential quarter in the candidate cell list being determined the residential quarter; Concrete mode is the carrier frequency that in described system, each residential quarter in balanced candidate cell list only comprises a kind of frequency range, with the frequency range priority of described this frequency range priority that sets in advance as the reality of this each residential quarter; Perhaps
Each residential quarter in described system in balanced candidate cell list comprises the carrier frequency of multiple frequency range, and in all frequency range priority that set in advance, the highest priority is as the frequency range priority of the reality of this each residential quarter.
Step S107: the HCS priority weighting of each residential quarter balanced candidate cell list in the radio network controller webmaster obtains pre-configured described system, and judge whether the HCS priority weighting of residential quarter is zero; If be zero, execution in step S111; Otherwise execution in step S108;
Step S108: obtain the HCS hierarchical structure attribute of current area, and judge whether current area supports HCS, and namely whether current area belongs to the cell set of a certain hierarchical structure;
Step S109: if current area is not supported HCS, the current persistent district that terminal is set is 1 with the HCS priority of coverage cell, and the HCS priority that the current persistent district inclusion relation residential quarter of terminal is set is 0;
Step S110: if current area is supported HCS, the HCS priority of each residential quarter in the candidate cell list that obtains setting in advance from radio network controller network management data storehouse;
Step S111: whether the load priority weighting that judges the residential quarter that the radio network controller webmaster is pre-configured is zero;
Step S112: the load of each residential quarter in the calculated candidate cell list, and sort according to the load of residential quarter and determine the load priority of each residential quarter;
For each residential quarter, can be at the balanced thresholding of the pre-configured system's internal loading of radio network controller webmaster, the load of described each residential quarter is compared with the described balanced thresholding of system's internal loading that sets in advance, if the load of current area less than system's internal loading counterbalanced gate in limited time, be set to limit priority than the little maximum current area of the balanced thresholding of described system internal loading, come first in the candidate cell list; If the load of current area sorts together with other residential quarter according to load more than or equal to the balanced thresholding of system's internal loading, be set to lowest priority than the large maximum current area of the balanced thresholding of described system internal loading.
Step S113: the frequency range priority of the residential quarter that the frequency range pre-configured according to the radio network controller webmaster, HCS, load priority weighting and top process obtain, HCS priority, load priority, the priority weighting Weight that calculation plot is total;
Weight＝PRI
load*Weight
load+PRI
freq*Weight
freq+PRI
hcs*Weight
hcs
Each meaning of parameters is as follows:
Weight considers the total priority weighting in residential quarter after three kinds of factors.PRI
LoadBe the priority of cell load, Weight
LoadBe the priority weighting of cell load, pre-configured by the radio network controller webmaster.PRI
FreqBe the frequency range priority of residential quarter, Weight
FreqThe weight of frequency range priority, pre-configured by the radio network controller webmaster.PRI
hcsThe HCS priority of residential quarter, Weight
hcsThe HCS priority weighting of residential quarter.
Step S114: the priority weighting total according to the residential quarter sorts to all residential quarters in candidate cell list in system from high to low;
Step S115: first the residential quarter of coming in balanced candidate cell list in the described system after sequence is attempted admitting, admit successfully and access; Admit unsuccessfully and to attempt admitting to coming second residential quarter, the like; Judge at last in system, whether all admit unsuccessfully the residential quarter in the candidate cell list; (namely select the residential quarter of greatest priority weight to admit to terminal after the sequence, admit successfully access, flow process finishes; If admit unsuccessfully will attempt admitting to coming second residential quarter, admit successfully and access, admit and unsuccessfully will attempt coming the 3rd residential quarter; The like, until till in system, has all attempted the residential quarter in balanced candidate cell list.) step S116: if not, residential quarter in connecting system;
Step S120: if in system, candidate cell is all admitted failure, start load balancing flow process between system.
The summary speech, after load equalization method between multiband TD-SCDMA system block of the present invention comprises the wireless resource control connection request message or request for radio bearer assignment message that receiving terminal is initiated, according to adjacent cell in the system of the current persistent district of described terminal, balanced candidate cell list in the acquisition system; Thresholding balanced according to the frequency range priority that each residential quarter in balanced candidate cell list in described system is set in advance, layered cell structure priority and system's internal loading determined frequency range priority, the layered cell structure priority of the reality of described each residential quarter and the priority (as step S106, S109, S110 and S112) of loading; According to the frequency range priority weighting that each residential quarter in balanced candidate cell list in described system is set in advance, layered cell structure priority weighting and load priority weighting, and the frequency range priority of the reality of described each residential quarter of determining, layered cell structure priority and load priority, obtain total priority weighting (as step S113) of described each residential quarter; According to total priority weighting of described each residential quarter to all residential quarters in balanced candidate cell list in described system sort (as step S114); With being carried out, each residential quarter in balanced candidate cell list in the described system after sequence admits operation.
As Fig. 2 and top description, can find out when judgement frequency range priority weighting, layered cell structure priority weighting and load priority weighting are all 0, the total priority weighting that is easy to obtain current area is 0.Therefore after this has judged that one of them priority weighting is zero, need not to have obtained its respective priority.
As shown in Figure 3, be the flow chart of the load equalization method embodiment 2 between multiband TD-SCDMA system block of the present invention.
Step S120: judge whether terminal satisfies load balancing condition between system, satisfy simultaneously three conditions: between corresponding system, equalizer switch is for leaving; Subscriber equipment (UE) ability is supported 2G or 3G network; The current resident residential quarter of user exists with adjacent area between the system of covering or inclusion relation; Wherein in the system of inclusion relation, the adjacent area refers to that coverage is larger than current persistent district, and coverage comprises time-division (TD) adjacent area of current persistent district fully; Relation between the adjacent area is specifically configured by the radio network controller network management interface;
Step S121: if load balancing condition between discontented pedal system is returned to empty candidate cell list; Execution in step S122;
Step S122: the congestion control flow process of the current area that triggering terminal is resident;
Step S123: if satisfy load balancing condition between system, by obtaining balanced candidate cell list between system with adjacent area between the system of covering and inclusion relation;
Step S124: obtain the load of 2G cell the candidate cell list by the Iur-g interface from each residential quarter;
Wherein, the Iur-g interface is to be defined between base station controller (Base Station Controller) or the logic interfacing between base station controller (BSC) and radio network controller (RNC); Be mainly used in obtaining the load condition of different system cell (as the GSM residential quarter).Obtain the load of 2G adjacent area by the Iur-g interface, therefrom choose load the lightest 2G adjacent area and carry out between system balancedly, can improve the success rate of intersystem handover; Avoid causing the generation of intersystem handover failure because being balanced to load higher 2G adjacent area; And 2G adjacent area load itself higher be the main cause that causes the intersystem handover failure.
Step S 125: get rid of and load in the candidate cell list greater than the residential quarter of load balancing thresholding between system; Between system, the load balancing thresholding is what set in advance;
Step S126: select the candidate cell of the described current persistent district of conduct that between described system, balanced candidate cell list small area load is the lightest, carry out reorientating between system, detailed process is:
According to total load of residential quarter from low to high to candidate cell list sort; When total load is identical, sort from high to low by the capacitance grade of residential quarter; When the differentiated service type, real time business sorts from low to high by the Real-time Load of residential quarter, and non-real-time service sorts from low to high by the non real-time load of residential quarter; Load when identical, sort from high to low by the capacitance grade of residential quarter.
Step S127: between the system that judgement obtains, whether the candidate cell list is empty; If be empty, turn step S122, trigger the congestion control flow process of former residential quarter;
Step S128: select candidate cell list cell load the lightest residential quarter as the candidate cell of described current persistent district, reorientation flow process between triggering system is to gravity treatment flow process between data business triggering cell.
Embodiment 2 has described load balancing process between system, thereby after the failure of regulating system internal loading balancing procedure, can also reduce the congestion condition of 3G residential quarter by load balancing between system, improves user's impression.
The present invention considers to carry out load balancing control by carry out three combined factors for multiband; And between system in the load balancing flow process, introduce the load that the Iur-g interface obtains adjacent area between system, select between load the lightest system the adjacent area as the Target cell of equilibrium, thereby selected the residential quarter of total priority weighting value maximum of the residential quarter of a many factors such as load that considers frequency range, cell layer aggregated(particle) structure, residential quarter for terminal, the business that reached is the equal purpose of load of load between the residential quarter of different frequency ranges, different HCS layer, improves stability and the robustness of whole system.
Correspondingly, the present invention also provides the device of the Load balanced control between a kind of multiband TD-SCDMA system block, comprising:
Balanced candidate cell list acquisition module in system, after being used for the unlimited resources control connection request message or request for radio bearer assignment message of receiving terminal initiation, according to adjacent cell in the system of the current persistent district of described terminal, balanced candidate cell list in the acquisition system; In described system, adjacent cell comprises that the current persistent district of described terminal is with adjacent cell in the system of covering and inclusion relation.
The priority determination module, be connected with balanced candidate cell list acquisition module in described system, be used for thresholding balanced according to the frequency range priority that each residential quarter of balanced candidate cell list in described system is set in advance, layered cell structure priority and system's internal loading, determine frequency range priority, layered cell structure priority and the load priority of the reality of described each residential quarter;
Total priority weighting determination module, be connected with described priority determination module, be used for according to the frequency range priority weighting that each residential quarter of balanced candidate cell list in described system is set in advance, layered cell structure priority weighting and load priority weighting, and the frequency range priority of the reality of described each residential quarter of determining, layered cell structure priority and load priority, obtain total priority weighting of described each residential quarter;
The residential quarter order module is connected with described total priority weighting determination module, is used for according to total priority weighting of described each residential quarter, being sorted in all residential quarters of balanced candidate cell list in described system; With
Admit module, be connected with described residential quarter order module, be used for each residential quarter of balanced candidate cell list in the described system after sequence is admitted.
This controller also comprises: balance module between system, be connected with described admittance module, and be used for according to adjacent cell between the system of the current persistent district of described terminal balanced candidate cell list between the acquisition system; According to load balancing thresholding between the system that sets in advance, get rid of between described system balanced candidate cell list small area load greater than the residential quarter of load balancing thresholding between the described system that sets in advance; And select the candidate cell of the described current persistent district of conduct that between described system, balanced candidate cell list small area load is the lightest, carry out reorientating between system.
Load balanced control device between this multiband TD-SCDMA system block can adopt radio network controller, is also that radio network controller has above-mentioned these functional modules.
The priority determination module of this Load balanced control device is determined various priority according to following mode:
Each residential quarter in described system in balanced candidate cell list only comprises a kind of carrier frequency of frequency range, with the frequency range priority of described this frequency range priority that sets in advance as the reality of this each residential quarter; Perhaps
Each residential quarter in described system in balanced candidate cell list comprises the carrier frequency of multiple frequency range, and in all frequency range priority that set in advance, the highest priority is as the frequency range priority of the reality of this each residential quarter.
Judging whether current area supports layered cell structure, if current area is not supported described layered cell structure, is that the priority of the same current area that covers of current persistent district of described terminal is set to 1; For the priority of the current area of the current persistent district inclusion relation of described terminal is set to 0; If current area is supported described layered cell structure, with the layered cell structure priority of the described layered cell structure priority that sets in advance as the reality of described each residential quarter.
The load of described each residential quarter is compared with the described balanced thresholding of system's internal loading that sets in advance, be set to limit priority than the little maximum current area of the balanced thresholding of described system internal loading; Be set to lowest priority than the large maximum current area of the balanced thresholding of described system internal loading.
Load balancing controller of the present invention can be carried out the described flow process as above-mentioned embodiment 1 and 2, Fig. 1-3.The objective of the invention is to provide the load equalization method of introducing minizone after multiband in a kind of TD-SCDMA system, brought the load balancing between different frequency ranges, different HCS hierarchical structure small area.
Should be noted that at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can modify, change or be equal to replacement to the present invention, and not break away from the spirit and scope of the present invention and claim.
Claims (13)
1. the load equalization method between a multiband TD-SCDMA system block, is characterized in that, comprising:
After radio network controller receives the wireless resource control connection request message or request for radio bearer assignment message that terminal initiates, according to adjacent cell in the system of the current persistent district of described terminal, balanced candidate cell list in the acquisition system;
Thresholding balanced according to the frequency range priority that each residential quarter in balanced candidate cell list in described system is set in advance, layered cell structure priority and system's internal loading determined frequency range priority, the layered cell structure priority of the reality of described each residential quarter and the priority of loading;
According to the frequency range priority weighting that each residential quarter in balanced candidate cell list in described system is set in advance, layered cell structure priority weighting and load priority weighting, and the frequency range priority of the reality of described each residential quarter of determining, layered cell structure priority and load priority, obtain total priority weighting of described each residential quarter;
According to total priority weighting of described each residential quarter, sorted in all residential quarters in balanced candidate cell list in described system; With
Each residential quarter in balanced candidate cell list in described system after sequence is carried out admit operation.
2. the load equalization method between multiband TD-SCDMA system block as claimed in claim 1, is characterized in that, in described system, adjacent cell comprises that the current persistent district of described terminal is with adjacent cell in the system of covering and inclusion relation.
3. the load equalization method between multiband TD-SCDMA system block as claimed in claim 1 or 2, is characterized in that, the frequency range priority of the reality of described each residential quarter is determined according to following mode:
Each residential quarter in described system in balanced candidate cell list only comprises a kind of carrier frequency of frequency range, with the frequency range priority of described this frequency range priority that sets in advance as the reality of this each residential quarter; Perhaps
Each residential quarter in described system in balanced candidate cell list comprises the carrier frequency of multiple frequency range, and in all frequency range priority that set in advance, the highest priority is as the frequency range priority of the reality of this each residential quarter.
4. the load equalization method between multiband TD-SCDMA system block as claimed in claim 1 or 2, is characterized in that, the layered cell structure priority of the reality of described each residential quarter is determined according to following mode:
Judging whether current area supports layered cell structure, if current area is not supported described layered cell structure, is that the priority of the same current area that covers of current persistent district of described terminal is set to 1; For the priority of the current area of the current persistent district inclusion relation of described terminal is set to 0; If current area is supported described layered cell structure, with the layered cell structure priority of the described layered cell structure priority that sets in advance as the reality of described each residential quarter.
5. the load equalization method between multiband TD-SCDMA system block as claimed in claim 1 or 2, is characterized in that, the load priority of the reality of described each residential quarter is determined according to following mode:
The load of described each residential quarter is compared with the described balanced thresholding of system's internal loading that sets in advance, be set to limit priority than the little maximum current area of the balanced thresholding of described system internal loading; Be set to lowest priority than the large maximum current area of the balanced thresholding of described system internal loading.
6. the load equalization method between multiband TD-SCDMA system block as claimed in claim 1 or 2, is characterized in that, described sequence is descending from high to low.
7. the load equalization method between multiband TD-SCDMA system block as claimed in claim 1 or 2, it is characterized in that, described to after in the described system after sequence, failure is admitted in each residential quarter in balanced candidate cell list, load balancing process between executive system.
8. the load equalization method between multiband TD-SCDMA system block as claimed in claim 7, is characterized in that, between described system, the load balancing process comprises:
According to adjacent cell between the system of the current persistent district of described terminal, balanced candidate cell list between the acquisition system;
According to load balancing thresholding between the system that sets in advance, get rid of between described system balanced candidate cell list small area load greater than the residential quarter of load balancing thresholding between the described system that sets in advance; With
Select the candidate cell of the described current persistent district of conduct that between described system, balanced candidate cell list small area load is the lightest, carry out reorientating or gravity treatment between system.
9. the load equalization method between multiband TD-SCDMA system block as claimed in claim 8, is characterized in that, between described system, the load of balanced candidate cell list small area obtains by the Iur-g interface.
10. the Load balanced control device between a multiband TD-SCDMA system block, is characterized in that, comprising:
Balanced candidate cell list acquisition module in system, after being used for the wireless resource control connection request message or request for radio bearer assignment message of receiving terminal initiation, according to adjacent cell in the system of the current persistent district of described terminal, balanced candidate cell list in the acquisition system;
The priority determination module, be connected with balanced candidate cell list acquisition module in described system, be used for thresholding balanced according to the frequency range priority that each residential quarter of balanced candidate cell list in described system is set in advance, layered cell structure priority and system's internal loading, determine frequency range priority, layered cell structure priority and the load priority of the reality of described each residential quarter;
Total priority weighting determination module, be connected with described priority determination module, be used for according to the frequency range priority weighting that each residential quarter of balanced candidate cell list in described system is set in advance, layered cell structure priority weighting and load priority weighting, and the frequency range priority of the reality of described each residential quarter of determining, layered cell structure priority and load priority, obtain total priority weighting of described each residential quarter;
The residential quarter order module is connected with described total priority weighting determination module, is used for according to total priority weighting of described each residential quarter, being sorted in all residential quarters of balanced candidate cell list in described system; With
Admit module, be connected with described residential quarter order module, be used for each residential quarter of balanced candidate cell list in the described system after sequence is admitted.
11. the Load balanced control device between multiband TD-SCDMA system block as claimed in claim 10 is characterized in that, in described system, adjacent cell comprises that the current persistent district of described terminal is with adjacent cell in the system of covering or inclusion relation.
12. the Load balanced control device between multiband TD-SCDMA system block as claimed in claim 11 is characterized in that, also comprises:
Balance module between system is connected with described admittance module, is used for according to adjacent cell between the system of the current persistent district of described terminal balanced candidate cell list between the acquisition system; According to load balancing thresholding between the system that sets in advance, get rid of between described system balanced candidate cell list small area load greater than the residential quarter of load balancing thresholding between the described system that sets in advance; And select the candidate cell of the described current persistent district of conduct that between described system, balanced candidate cell list small area load is the lightest, carry out reorientating between system.
13. the load balance control method between a multiband TD-SCDMA system block is characterized in that, comprising:
After wireless resource control connection request message or request for radio bearer assignment message that receiving terminal is initiated, executive system internal loading balancing procedure, this process comprises:
According to adjacent cell in the system of the current persistent district of described terminal, balanced candidate cell list in the acquisition system;
Thresholding balanced according to the frequency range priority that each residential quarter in balanced candidate cell list in described system is set in advance, layered cell structure priority and system's internal loading determined frequency range priority, the layered cell structure priority of the reality of described each residential quarter and the priority of loading;
According to the frequency range priority weighting that each residential quarter in balanced candidate cell list in described system is set in advance, layered cell structure priority weighting and load priority weighting, and the frequency range priority of the reality of described each residential quarter of determining, layered cell structure priority and load priority, obtain total priority weighting of described each residential quarter;
According to total priority weighting of described each residential quarter, sorted in all residential quarters in balanced candidate cell list in described system; With
Each residential quarter in balanced candidate cell list in described system after sequence is admitted;
If in the system that produces in balanced candidate cell list each residential quarter admit unsuccessfully, load balancing process between executive system;
If between system, the load balancing process does not obtain balanced candidate cell list between system, or balanced candidate cell reorientation flow process failure between the system that obtains, the congestion control process of the current persistent district of the described terminal of execution.
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| CN 200910165678 CN101998514B (en) | 2009-08-14 | 2009-08-14 | Method and controller for balancing load among cells of multiband time division-synchronous code division multiple access (TD-SCDMA) system |
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| CN 200910165678 CN101998514B (en) | 2009-08-14 | 2009-08-14 | Method and controller for balancing load among cells of multiband time division-synchronous code division multiple access (TD-SCDMA) system |
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| CN103118371B (en) * | 2011-11-17 | 2018-08-24 | 南京中兴新软件有限责任公司 | carrier frequency control method and device |
| CN102547857A (en) * | 2011-12-19 | 2012-07-04 | 中兴通讯股份有限公司 | Load equilibrium processing method and control device |
| CN102547765B (en) * | 2012-02-03 | 2014-11-05 | 大唐移动通信设备有限公司 | Automatic planning method for inter-system adjacent cell and system thereof |
| CN103249094B (en) * | 2012-02-06 | 2016-12-14 | 中兴通讯股份有限公司 | A kind of load equalization method and system |
| CN103260221B (en) * | 2012-02-20 | 2018-05-04 | 中兴通讯股份有限公司 | Cell accessing method and device |
| CN103298031B (en) * | 2012-02-29 | 2016-12-28 | 中兴通讯股份有限公司 | The load equalization method of wireless access interlayer and device |
| CN103517337B (en) * | 2012-06-29 | 2018-07-06 | 中兴通讯股份有限公司 | Information on load acquisition methods, device and system |
| CN103582018A (en) * | 2012-08-03 | 2014-02-12 | 华为技术有限公司 | Intersystem load control method, access equipment and user equipment |
| CN106900010B (en) * | 2015-12-21 | 2019-08-09 | 大唐移动通信设备有限公司 | A kind of method and device carrying out load balancing based on RRC connection |
| CN106973414A (en) * | 2016-01-14 | 2017-07-21 | 中兴通讯股份有限公司 | A kind of method and device of selection cell |
| CN108307440A (en) * | 2016-09-18 | 2018-07-20 | 大唐移动通信设备有限公司 | The method of load balancing and base station between a kind of base station |
| WO2022027330A1 (en) * | 2020-08-05 | 2022-02-10 | Oppo广东移动通信有限公司 | Cell selection method and related device |
| CN113938954B (en) * | 2021-10-12 | 2023-06-30 | 中国联合网络通信集团有限公司 | Load balancing optimization method, device and storage medium |
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| BRPI0510565A (en) * | 2004-08-05 | 2007-11-20 | Lg Electronics Inc | discontinuation of frequency layer convergence scheme use |
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| CN1675957A (en) * | 2002-08-21 | 2005-09-28 | 摩托罗拉公司 | Resource utilisation between different frequency bands by compensating handover parameter values with a frequency band preference parameter |
| CN101137223A (en) * | 2007-09-21 | 2008-03-05 | 华为技术有限公司 | Base station, frequency band load regulation means and system in multi-frequency band network |
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