CN103428790B - Cell switching method and communicator - Google Patents

Cell switching method and communicator Download PDF

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Publication number
CN103428790B
CN103428790B CN201210162235.1A CN201210162235A CN103428790B CN 103428790 B CN103428790 B CN 103428790B CN 201210162235 A CN201210162235 A CN 201210162235A CN 103428790 B CN103428790 B CN 103428790B
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subscriber equipment
load
cell
origin
switched
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CN103428790A (en
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尤肖虎
王浩
李知航
潘志文
刘楠
宋平
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201210162235.1A priority Critical patent/CN103428790B/en
Priority to PCT/CN2013/073717 priority patent/WO2013174179A1/en
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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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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention discloses a kind of cell switching method and communicator, avoid the subscriber equipment switched to produce to the high capacity community of initiating load balancing switching the problem that excessive interference increases the load of this community on the contrary.The method comprises: determine to be switched subscriber equipment in cell-of-origin and Target cell corresponding to be switched subscriber equipment; For each to be switched subscriber equipment, respectively load is carried out to cell-of-origin and adjacent area thereof and Target cell corresponding to be switched subscriber equipment and adjacent area thereof and estimate iterative computation, wherein, estimate the load each time calculating from second time load and estimate calculating, carry out according to the result that calculating is estimated in a front load, until the difference that the load value that calculates and a front load estimate the load value calculated is estimated in cell-of-origin and each adjacent area thereof and Target cell and the present load of each adjacent area thereof be less than default error threshold; Estimate iterative computation result according to load, to be switched subscriber equipment, select changeable subscriber equipment to switch.

Description

Cell switching method and communicator
Technical field
The present invention relates to technical field of communication, especially relate to a kind of cell switching method and communicator.
Background technology
In cell mobile communication systems, because the traffic carrying capacity of each community is with subscriber equipment (UE, UserEquipment) arrival is the change at random on time and geographical position, often there is the load imbalance problem of each minizone, thus cause high capacity cell radio resource nervous and the service quality (QoS of subscriber equipment can not be met, QualityofService) requirement, and in low loaded cell, then there is the situation of waste of radio resources.In order to improve the utilance of Radio Resource, there has been proposed mobility load balance (MLB, MobilityLoadBalancing) algorithm, namely by being switched in the neighbor cell of low load by the subscriber equipment at the edge in high capacity community, realizes the approximate equalization of inter-cell load.
The subscriber equipment at the edge in high capacity community is normally directly switch in the neighbor cell of low load by existing MLB technology, thus interfering with each other may appear in the subscriber equipment at the edge of adjacent community overlapping region, cause the negative gain problem that high capacity cell load level rises.
Summary of the invention
Embodiments provide a kind of cell switching method and communicator, avoid the subscriber equipment switched to produce to the high capacity community of initiating load balancing switching the problem that excessive interference increases the load of this community on the contrary.
In view of this, the embodiment of the present invention provides respectively:
A kind of cell switching method, comprising:
Determine to be switched subscriber equipment in cell-of-origin and Target cell corresponding to described to be switched subscriber equipment;
For each to be switched subscriber equipment, respectively load is carried out to cell-of-origin and adjacent area thereof and Target cell corresponding to described to be switched subscriber equipment and adjacent area thereof and estimate iterative computation, wherein, estimate the load each time calculating from second time load and estimate calculating, carry out according to the result that calculating is estimated in a front load, until the difference that the load value that calculates and a front load estimate the load value calculated is estimated in cell-of-origin and each adjacent area thereof and Target cell and the present load of each adjacent area thereof be less than default error threshold;
Estimate iterative computation result according to load, from described to be switched subscriber equipment, select changeable subscriber equipment to switch.
A kind of communicator, comprising:
Determination module, for determining to be switched subscriber equipment in cell-of-origin and Target cell corresponding to described to be switched subscriber equipment;
Module is estimated in load, for for each to be switched subscriber equipment, respectively load is carried out to cell-of-origin and adjacent area thereof and Target cell corresponding to described to be switched subscriber equipment and adjacent area thereof and estimate iterative computation, wherein, estimate the load each time calculating from second time load and estimate calculating, carry out according to the result that calculating is estimated in a front load, until the difference that the load value that calculates and a front load estimate the load value calculated is estimated in cell-of-origin and each adjacent area thereof and Target cell and the present load of each adjacent area thereof be less than default error threshold;
Handover module, for estimating iterative computation result according to load, selects changeable subscriber equipment to switch from described to be switched subscriber equipment.
As can be seen from the above technical solutions, a kind of cell switching method that the embodiment of the present invention provides and communicator, before being switched by the subscriber equipment in cell-of-origin, this subscriber equipment is estimated the load variations that cell-of-origin and Target cell cause after handover, make the high capacity community of initiating load balancing switching, namely to be switched subscriber equipment is switched to corresponding Target cell to reduce the load of cell-of-origin by cell-of-origin, after avoiding to be switched subscriber equipment to switch, interference produced to cell-of-origin simultaneously and cause the negative gain that cell-of-origin load level rises, thus effectively reduce the load of high capacity community, improve resource utilization ratio.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described describing the required accompanying drawing used to embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
A kind of cell switching method flow chart that Fig. 1 provides for the embodiment of the present invention;
Changeable subscriber equipment is selected to carry out the flow chart of steps switched in a kind of cell switching method that Fig. 2 provides for the embodiment of the present invention;
A kind of cell switching method flow chart that Fig. 3 provides for another embodiment of the present invention;
Changeable subscriber equipment is selected to carry out the flow chart of steps switched in a kind of cell switching method that Fig. 4 provides for another embodiment of the present invention;
The structural representation of a kind of communicator that Fig. 5 provides for the embodiment of the present invention;
The structural representation of a kind of communicator that Fig. 6 provides for another embodiment of the present invention.
Embodiment
Embodiments provide a kind of cell switching method and communicator, avoid the subscriber equipment switched to produce to the high capacity community of initiating load balancing switching the problem that excessive interference increases the load of this community on the contrary.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
First, in the prior art, be θ for guaranteed rate demand each in arbitrary cell i kthe load of subscriber equipment k can be designated as:
ρ i , k = 1 R tot θ k BW × log 2 ( 1 + SINR i , k ) - - - ( 1 ) ,
Wherein, BW is the bandwidth of time/frequency source block within the unit interval; R totthe total resources number of cell i within a load balancing cycle, i.e. total time/frequency source block number; The obtained Signal to Interference plus Noise Ratio SINR of subscriber equipment k in cell i i, kreference Signal Received Power (RSRP, ReferenceSignalReceivingPower) the intensity s of the adjacent area j that can be measured by this subscriber equipment k j, k, and this subscriber equipment k measure residing for the RSRP intensity of cell i calculate, now cell i can be considered the residing Serving cell that this subscriber equipment k can measure, and the RSRP intensity of cell i is s i, k, to sum up, SINR i, kcomputing formula is as follows:
SINR i , k = s i , k N + Σ j ≠ i ρ j s j , k - - - ( 2 ) ,
Wherein, N is noise power, ρ jfor the load of community j.
To sum up, for arbitrary cell i, the computing formula of the load of this community can be designated as:
ρ i＝∑ρ i，k(3)，
Wherein, subscriber equipment k is the subscriber equipment in cell i.
Be understandable that, as the load ρ of cell i ibe not less than load balancing and start thresholding MLB thresholdtime, cell i can be adjacent the periodic load of community alternately with the initiation of load balancing cycle, selects the load balance community alternatively, neighbor cell being greater than load difference thresholding with the load difference of cell i.
Please refer to Fig. 1, the flow chart of a kind of cell switching method that Fig. 1 provides for the embodiment of the present invention, the method comprises:
S101, determine to be switched subscriber equipment in cell-of-origin and Target cell corresponding to be switched subscriber equipment;
Be understandable that, the executive agent of this method embodiment can be a kind of communicator, this communicator can be evolved base station eNB, base station controller (BSC, BaseStationController), radio network controller (RNC, RadioNetworkController) etc.
Determine the Target cell that in cell-of-origin, to be switched subscriber equipment is corresponding, Target cell is the community in adjacent area, cell-of-origin; Wherein, each to be switched subscriber equipment in cell-of-origin can a corresponding Target cell, but each to be switched subscriber equipment can have identical Target cell.
S102, for each to be switched subscriber equipment, respectively load is carried out to cell-of-origin and adjacent area thereof and Target cell corresponding to be switched subscriber equipment and adjacent area thereof and estimates iterative computation,
Wherein, estimate the load each time calculating from second time load and estimate calculating, carry out according to the result that calculating is estimated in a front load, until the difference that the load value that calculates and a front load estimate the load value calculated is estimated in cell-of-origin and each adjacent area thereof and Target cell and the present load of each adjacent area thereof be less than default error threshold;
In some embodiments, for each to be switched subscriber equipment, estimate in the process of iterative computation in load, execute first time load estimate calculating after load each time estimate calculating, the result estimating calculating according to a front load is all needed to carry out, namely calculating is estimated in second time load needs the result estimating calculating according to first time load to carry out, third time needs the result estimating calculating according to second time load to carry out, carry out load according to this and estimate iterative computation, until the difference that the load value that calculates and a front load estimate the load value calculated is estimated in cell-of-origin and each adjacent area thereof and Target cell and the present load of each adjacent area thereof be less than default error threshold, namely last load is estimated the difference that the load value obtained of calculating and a front load estimate the load value calculated and is less than default error threshold.
Be understandable that, this default error threshold can be an error threshold set by service provider, does not do concrete restriction herein.
S103, estimate iterative computation result according to load, to be switched subscriber equipment, select changeable subscriber equipment to switch;
Be understandable that, for each to be switched subscriber equipment, after completing step S102, can think that the load before switching is estimated, need to be switched subscriber equipment, select the subscriber equipment satisfied condition to switch, wherein, using the subscriber equipment that satisfies condition as changeable subscriber equipment.
In some embodiments, the method selecting changeable subscriber equipment to carry out switching to be switched subscriber equipment can with reference to the steps flow chart shown in figure 2, and wherein, step comprises:
S1031, for each to be switched subscriber equipment, if the load of Target cell is less than load balancing startup thresholding after this to be switched subscriber equipment switches to corresponding Target cell, after then judging whether to exist the Target cell switching to correspondence, the last load of cell-of-origin is estimated result of calculation and is less than the first to be switched subscriber equipment that load balancing starts thresholding;
Switch according to judged result: after switching to corresponding Target cell if exist, the last load of cell-of-origin is estimated result of calculation and is less than the first to be switched subscriber equipment that load balancing starts thresholding, then perform step S1032a, if do not exist, then perform step S1032b.
S1032a, the first to be switched subscriber equipment is chosen as changeable subscriber equipment, this changeable subscriber equipment is switched;
S1032b, the last load of cell-of-origin estimated the 3rd to be switched subscriber equipment that result of calculation is less than the initial load of cell-of-origin and be chosen as changeable subscriber equipment, this changeable subscriber equipment is switched.
A kind of cell switching method that the embodiment of the present invention provides, before being switched by the subscriber equipment in cell-of-origin, this subscriber equipment is estimated the load variations that cell-of-origin and Target cell cause after handover, the high capacity community (i.e. cell-of-origin) of initiating load balancing switching is made to be switched subscriber equipment to be switched to corresponding Target cell to reduce the load of cell-of-origin, after avoiding to be switched subscriber equipment to switch, interference produced to cell-of-origin simultaneously and cause the negative gain that cell-of-origin load level rises, and the load meeting Target cell does not start thresholding higher than load, thus effectively reduce the load of high capacity community, improve resource utilization ratio.
Conveniently understand, in a kind of cell switching method that following examples provide, can will initiate the community of load balancing switching, namely cell-of-origin is designated as i; And to suppose in the i of cell-of-origin total n to be switched subscriber equipment (n be greater than or equal to 1 integer), wherein, subscriber equipment k is one of them in n to be switched subscriber equipment;
Please refer to Fig. 3, the flow chart of the cell switching method that Fig. 3 provides for this embodiment, its step comprises:
S301, determine to be switched subscriber equipment in cell-of-origin and Target cell corresponding to be switched subscriber equipment;
In some embodiments, the to be switched subscriber equipment in cell-of-origin and Target cell corresponding to be switched subscriber equipment can be determined by the following method:
For the subscriber equipment in cell-of-origin, the cell-of-origin Reference Signal Received Power RSRP intensity obtaining subscriber equipment and the RSRP intensity of all adjacent areas measured in cell-of-origin;
Be understandable that, this step can be directed to the edge customer equipment in cell-of-origin.
If the difference of the RSRP intensity of maximum RSRP intensity and cell-of-origin is greater than default handoff threshold in the RSRP intensity of all adjacent areas measured in cell-of-origin, then determine that this subscriber equipment is to be switched subscriber equipment, adjacent area corresponding to maximum RSRP intensity is the Target cell of this to be switched subscriber equipment.
Wherein, each to be switched subscriber equipment can a corresponding Target cell, but each to be switched subscriber equipment can have identical Target cell.
Be understandable that, if to be switched subscriber equipment is subscriber equipment k, Target cell corresponding for subscriber equipment k can be designated as T k, then subscriber equipment k is at Target cell T krSRP intensity be greater than default handoff threshold in the difference of the RSRP intensity of cell-of-origin i and can be expressed as by formula:
Δ S k = s T k , k - s i , k > handover threshold - - - ( 4 ) ,
Wherein, Δ S kfor subscriber equipment k is at the Target cell T of correspondence kwith the difference of the RSRP intensity at cell-of-origin i, handover thresholdfor default handoff threshold, this handoff threshold preset can be the handoff threshold of service provider's setting.
S302, arranged according to the order of sequence according to Reference Signal Received Power RSRP strength difference by be switched subscriber equipment, RSRP strength difference is the difference of the RSRP intensity of the corresponding Target cell that to be switched subscriber equipment measures and the RSRP intensity of cell-of-origin;
In some embodiments, to be switched subscriber equipment can be arranged by descending order according to RSRP strength difference, also can arrange by ascending order according to RSRP strength difference, wherein, RSRP strength difference is the difference of the RSRP intensity of the corresponding Target cell that to be switched subscriber equipment measures and the RSRP intensity of cell-of-origin.
In the present embodiment, undertaken being arranged as application scenarios analysis by descending order according to RSRP strength difference with just to be switched subscriber equipment.
From step S301, if for subscriber equipment k, this first difference can be expressed as by formula:
Δ S k = s T k , k - s i , k - - - ( 5 ) ,
Be understandable that, for the n in the i of cell-of-origin to be switched subscriber equipment, can first arrange by the order that its RSRP strength difference is descending, wherein, Δ S 1, Δ S 2... Δ S k... Δ S nthe difference of the RSRP intensity in the RSRP intensity of the corresponding Target cell measured corresponding to each to be switched subscriber equipment and cell-of-origin i can be represented, and Δ S 1> Δ Δ S 2> ... Δ S k> ... Δ S n, correspondingly can be designated as T corresponding to the Target cell of each to be switched subscriber equipment 1, T 2... T k... T n.
S303, for each to be switched subscriber equipment, respectively first time load is carried out to cell-of-origin and Target cell corresponding to be switched subscriber equipment and estimate calculating;
Wherein, in this step, first time load is estimated calculating and is comprised: if calculate this to be switched subscriber equipment to switch to the first load of Target cell and the second load of cell-of-origin behind corresponding Target cell, and control the adjacent area that the first load is sent to Target cell by Target cell corresponding to this to be switched subscriber equipment, control the adjacent area that the second load is sent to cell-of-origin by cell-of-origin;
Wherein, after having calculated the first load and the second load, the first load has been sent to its each adjacent area by communicator control objectives community, makes each adjacent area of Target cell corresponding to this to be switched subscriber equipment know the first load; Communicator controls cell-of-origin and the second load is sent to its each adjacent area, makes each adjacent area of cell-of-origin know the second load.
Be understandable that, between neighbor cell, load transmission and reception can be carried out by X2 interface or S1 interface.
In addition, before execution step S303, can also comprise:
The guaranteed rate of to be switched subscriber equipment and the RSRP intensity of all adjacent areas that measures in cell-of-origin thereof are sent to corresponding Target cell;
In some embodiments, for subscriber equipment k, be by its relevant information by minizone interactive interfacing to Target cell T k, wherein, relevant information comprises subscriber equipment k guaranteed rate θ in the i of cell-of-origin k, and the RSRP intensity s of the neighbor cell j measured j, kdeng, make this to be switched subscriber equipment calculate according to guaranteed rate and the RSRP intensitometer of all adjacent areas that measures in cell-of-origin thereof the load taken in residing community.
In the present embodiment, be directed to the individual to be switched subscriber equipment of the n being undertaken arranging by the order that RSRP strength difference is descending, first can calculate first to be switched subscriber equipment and switch to the first load of Target cell and the second load of cell-of-origin behind corresponding Target cell, then the related load carrying out follow-up to be switched subscriber equipment estimates calculating.
For the subscriber equipment k in n to be switched subscriber equipment, the Target cell of its correspondence is T k, can calculate by formula (2) and formula (3) load that subscriber equipment k takies in the i of cell-of-origin, be designated as ρ i, k, and subscriber equipment k is at Target cell T kin the load that takies, be designated as the initial load that then can be calculated cell-of-origin by formula (4) is ρ iand the initial load of Target cell is
If subscriber equipment k then just can be calculated switch to corresponding Target cell T kafter, Target cell T kload be namely the first load in embodiment; The load of cell-of-origin i is ρ i-ρ i, k, the second load namely in embodiment.
S304, for each community, according to the load information of the adjacent area received, trigger load next time and estimate calculating, and load is estimated result of calculation and be sent to each adjacent area, until the difference that the load value that calculates and a front load estimate the load value calculated is estimated in cell-of-origin and each adjacent area thereof and Target cell and the present load of each adjacent area thereof be less than default error threshold;
Completing after first time, load estimated calculating, each community according to the load information of the adjacent area received, can be triggered load next time and estimates calculating, and load is estimated result of calculation and be sent to each adjacent area; Wherein, load information can refer to, the information of the relevant load that the RSRP intensity etc. of the neighbor cell measured according to guaranteed rate and the subscriber equipment of subscriber equipment is calculated; Thus, each community is according to these load informations, calculate the present load of self, and this present load is sent to each neighbor cell, then this action is repeated with a certain load balancing cycle, namely until the present load of cell-of-origin and each adjacent area and Target cell and each adjacent area self thereof with before once, the difference that namely load value calculated is estimated in a front load is less than default error threshold.
During owing to the to be switched subscriber equipment of cell-of-origin being switched in corresponding Target cell, need the loading condition assessing adjacent area, add that the load of community is change, so the cycle will be carried out alternately to understand the loading condition of adjacent area, until the difference of the present load of each community self previous load is with it less than default error threshold, be for ensureing that community increases or load load for other community of reducing remains unchanged.
In some embodiments, for subscriber equipment k, if hypothesis switches to corresponding Target cell T k, Target cell T kby the first load be sent to each neighbor cell, cell-of-origin i is by the second load ρ i-ρ i, kafter being sent to each neighbor cell, each community in system needs the load information according to receiving, adopt aforementioned formula (1), present load that (2), (3) calculate self, and it is mutual this present load to be sent to each neighbor cell, until the difference of the present load of self previous load is with it less than default error threshold.
Be understandable that, if this subscriber equipment k has carried out one of them in n the to be switched subscriber equipment arranged, if subscriber equipment k is switched to corresponding Target cell T by the order that the first difference is descending kafter cell-of-origin is calculated according to the load information received the difference of present load previous load be with it less than default error threshold, then according to the order that the first difference is descending, before carrying out the switching of the to be switched subscriber equipment of kth+1, calculating is estimated in load.
S305, estimate iterative computation result according to load, to be switched subscriber equipment, select changeable subscriber equipment to switch;
Be understandable that, for each to be switched subscriber equipment, after completing step S304, can think that the load before switching is estimated, need to be switched subscriber equipment, select the subscriber equipment meeting certain condition to switch, wherein, the subscriber equipment of certain condition will be met as changeable subscriber equipment.
In some embodiments, from n the to be switched subscriber equipment being undertaken by the order that RSRP strength difference is descending arranging, changeable subscriber equipment is selected to carry out the method switched, can with reference to the steps flow chart shown in figure 4, wherein, step comprises:
S3051, for each to be switched subscriber equipment, if the first load of Target cell is less than load balancing startup thresholding after this to be switched subscriber equipment switches to corresponding Target cell, after then judging whether to exist the Target cell switching to correspondence, the last load of cell-of-origin is estimated result of calculation and is less than the first to be switched subscriber equipment that load balancing starts thresholding;
Usually, as the load ρ of community a abe not less than load balancing and start thresholding MLB thresholdtime, the periodic load that community a can be adjacent community with a certain load balancing cycle initiation is mutual, and wherein, this load balancing starts thresholding MLB threshold, the thresholding of namely load balancing initiation;
In the present embodiment, if the first load of Target cell is less than load balancing startup thresholding MLB after to be switched subscriber equipment switches to corresponding Target cell threshold, then represent that this to be switched subscriber equipment is expected to switch to corresponding Target cell.
Thereafter, switch according to judged result: after switching to corresponding Target cell if exist, the last load of cell-of-origin is estimated result of calculation and is less than the first to be switched subscriber equipment that load balancing starts thresholding, then perform step S3052a, if do not exist, then perform step S3052b.
S3052a, by the second maximum for RSRP strength difference in the first to be switched subscriber equipment to be switched subscriber equipment, and the to be switched subscriber equipment that in all to be switched subscriber equipmenies, RSRP strength difference is larger than the RSRP strength difference of the second to be switched subscriber equipment is chosen as changeable subscriber equipment, switches this changeable subscriber equipment;
S3052b, estimate result of calculation in the last load of cell-of-origin and be less than in the 3rd to be switched subscriber equipment of the initial load of cell-of-origin, by the 4th maximum for RSRP strength difference to be switched subscriber equipment, and the to be switched subscriber equipment that in all to be switched subscriber equipmenies, RSRP strength difference is larger than the RSRP strength difference of the 4th to be switched subscriber equipment is chosen as changeable subscriber equipment, switches this changeable subscriber equipment.
A kind of cell switching method that the embodiment of the present invention provides, before being switched by the subscriber equipment in cell-of-origin, this subscriber equipment is estimated the load variations that cell-of-origin and Target cell cause after handover, make the high capacity community of initiating load balancing switching, namely to be switched subscriber equipment is switched to corresponding Target cell to reduce the load of cell-of-origin by cell-of-origin, after avoiding to be switched subscriber equipment to switch, interference produced to cell-of-origin simultaneously and cause the negative gain that cell-of-origin load level rises, thus effectively reduce the load of high capacity community, improve resource utilization ratio.
Subscriber equipment to be switched in cell-of-origin can arrange by the order that RSRP strength difference is descending by the embodiment of the present invention, this RSRP strength difference is the difference of the RSRP intensity of the Target cell of the correspondence that to be switched subscriber equipment measures and the RSRP intensity of cell-of-origin, following examples are estimated as application scenarios to carry out switching front load again after by this order, are described in detail to the inventive method.
Conveniently understand, in a kind of cell switching method that following examples provide, can will initiate the community of load balancing switching, namely cell-of-origin is designated as i; And suppose total n to be switched subscriber equipment in the i of cell-of-origin, wherein, subscriber equipment k is one of them in n to be switched subscriber equipment.
First, suppose to determine to be switched subscriber equipment in cell-of-origin and Target cell corresponding to be switched subscriber equipment, wherein, the method determined can be: be directed to the subscriber equipment in cell-of-origin, the cell-of-origin Reference Signal Received Power RSRP intensity obtaining subscriber equipment and the RSRP intensity of all adjacent areas measured in cell-of-origin; If the difference of the RSRP intensity of maximum RSRP intensity and cell-of-origin is greater than default handoff threshold in the RSRP intensity of all adjacent areas measured in cell-of-origin, then determine that this subscriber equipment is to be switched subscriber equipment, adjacent area corresponding to maximum RSRP intensity is the Target cell of this to be switched subscriber equipment.
By the n in the i of cell-of-origin to be switched subscriber equipment, the order descending by its RSRP strength difference arranges, wherein, and Δ S 1, Δ S 2... Δ S k... Δ S nthe difference corresponding to the RSRP intensity of each to be switched subscriber equipment in the Target cell of correspondence with it in the i of cell-of-origin can be represented, and Δ S 1> Δ S 2> ... Δ S k> ... Δ S n, correspondingly can be designated as T corresponding to the Target cell of each to be switched subscriber equipment 1, T 2... T k... T n.
Wherein, to be switched subscriber equipment switches to the load of Target cell behind corresponding Target cell, i.e. the first load load that can be taken in Target cell by this to be switched subscriber equipment, and the initial load of this Target cell calculates; To be switched subscriber equipment switches to the load of cell-of-origin behind corresponding Target cell, i.e. the second load load that can be taken in cell-of-origin by this to be switched subscriber equipment, and cell-of-origin initial load calculates.
Particularly, for the subscriber equipment k in n to be switched subscriber equipment, the Target cell of its correspondence is T k, can calculate by formula (2) and formula (3) load that subscriber equipment k takies in the i of cell-of-origin, be designated as ρ i, k, and subscriber equipment k is at Target cell T kin the load that takies, be designated as the initial load that then can be calculated cell-of-origin by formula (4) is ρ iand the initial load of Target cell is
Record n to be switched subscriber equipment and corresponding information thereof, as shown in Table 1:
Table one
As pressed the descending sequence of RSRP strength difference in table one, front load being switched to this n to be switched subscriber equipment and estimates iterative computation, namely first to first to be switched subscriber equipment, be designated as to be switched subscriber equipment 1 and carry out switching front load and estimate iterative computation.
If to be switched subscriber equipment 1 switches to corresponding Target cell T 1after, the first load of Target cell be not less than load balancing and start thresholding MLB threshold, then in table, the to be switched subscriber equipment 1 of Section 4 has switched the initial load ρ that opisthogenesis cell i load value is cell-of-origin i, in table, the switching indicator variable of the to be switched subscriber equipment 1 of Section 5 is 0, represents not changeable.
On the contrary, if to be switched subscriber equipment 1 switches to corresponding Target cell T 1after, Target cell first load be less than load balancing and start thresholding MLB threshold, then represent to be switched subscriber equipment 1 and be expected to switch to corresponding Target cell, the second load calculating now cell-of-origin is ρ i-ρ i, 1, the relevant information of to be switched subscriber equipment 1 is sent to Target cell T by minizone interface 1, wherein, information can comprise to be switched subscriber equipment 1 guaranteed rate θ in the i of cell-of-origin 1, and the community j measured 1rSRP intensity s j1, kdeng; Afterwards, Target cell T 1the first load is sent to each neighbor cell cell-of-origin i sends the second load ρ to each neighbor cell i-ρ i, 1.
At Target cell T 1the first load is sent to each neighbor cell cell-of-origin i sends the second load ρ to each neighbor cell i-ρ i, 1afterwards, each community in system can according to the load information received, adopt aforementioned formula (1), present load that (2), (3) calculate self, and the present load of self is sent to all adjacent areas, then this action is repeated with a certain load balancing cycle, until the difference that the load value that calculates and a front load estimate the load value calculated is estimated in cell-of-origin and each adjacent area thereof and Target cell and the present load of each adjacent area thereof be less than default error threshold.Now, the present load that cell-of-origin is calculated is recorded to the to be switched subscriber equipment 1 of Section 4 in table to have switched in opisthogenesis cell i load value.
So far, can think that completing the load before the handover of to be switched subscriber equipment 1 estimates calculating, put in order according to the descending of RSRP strength difference, start to estimate calculating to the load before to be switched subscriber equipment 2 switches, until to be switched subscriber equipment n switches to corresponding Target cell T nafter, its cell-of-origin and each adjacent area thereof and Target cell and the present load of each adjacent area thereof are estimated the difference that the load value that calculates and a front load estimate the load value calculated and are less than default error threshold, then terminate all to be switched subscriber equipmenies switch before load estimate calculating.
So far, can think completed all to be switched subscriber equipmenies switching before load estimate iterative computation, now, estimate result of calculation according to load, to be switched subscriber equipment, select changeable subscriber equipment to switch.
In the present embodiment, following methods can be adopted to judge whether this to be switched subscriber equipment can be used as changeable subscriber equipment and switch:
In table one Section 4, find first load to estimate calculating and complete opisthogenesis cell i load value and be less than load balancing and start thresholding MLB thresholdto be switched subscriber equipment, namely the second to be switched subscriber equipment is found, then the second to be switched subscriber equipment and the RSRP strength difference to be switched subscriber equipment larger than the RSRP strength difference of the second to be switched subscriber equipment are chosen as changeable subscriber equipment, and be designated as 1 at the switching indicator variable of to be switched subscriber equipment corresponding to table one Section 5, represent changeable; Contacts list one, the to be switched subscriber equipment that the switching indicator variable by the to be switched subscriber equipment of table one Section 5 is designated as 1 switches to corresponding Target cell, has so far switched.
If in table one Section 4, do not meet switching and complete opisthogenesis cell i load value and be less than load balancing and start thresholding MLB threshold, namely there is not the first to be switched subscriber equipment in the to be switched subscriber equipment of this condition, then the initial load ρ finding first switching to complete opisthogenesis cell i load value to be less than cell-of-origin i ito be switched subscriber equipment, namely the 4th to be switched subscriber equipment is found, then to be switched subscriber equipment large for the RSRP strength difference of the 4th to be switched subscriber equipment and RSRP strength difference subscriber equipment more to be switched than this is chosen as changeable subscriber equipment, and be designated as 1 at the switching indicator variable of to be switched subscriber equipment corresponding to table one Section 5, represent changeable; Contacts list one, the to be switched subscriber equipment that the switching indicator variable by the to be switched subscriber equipment of table one Section 5 is designated as 1 switches to corresponding Target cell, has so far switched.
For the ease of understanding, suppose that to be switched subscriber equipment sum n equals 20, and iterative computation is estimated in the load that hypothesis has completed all to be switched subscriber equipmenies, now judges in be switched subscriber equipment 1 ~ 20, which to be switched subscriber equipment can be chosen as changeable subscriber equipment:
First, in table one Section 4, switched opisthogenesis cell i load value if find out and be less than load balancing startup thresholding MLB thresholdto be switched subscriber equipment, namely the first to be switched subscriber equipment is found out, if exist and the first to be switched subscriber equipment is 9,10,12,13,15, then in the first to be switched subscriber equipment 9,10,12,13,15, find out first satisfied switching and complete opisthogenesis cell i load value and be less than load balancing and start thresholding MLB thresholdto be switched subscriber equipment, namely the second to be switched subscriber equipment is found out, the second to be switched subscriber equipment 9 that namely in the first to be switched subscriber equipment, RSRP strength difference is maximum, therefore the to be switched subscriber equipment 1 ~ 8 before the second to be switched subscriber equipment 9 and the second to be switched subscriber equipment 9, its corresponding Target cell T is switched to respectively 1~ T 9.
If in table one Section 4, do not meet switching and complete opisthogenesis cell i load value and be less than load balancing and start thresholding MLB threshold, namely there is not the first to be switched subscriber equipment in the to be switched subscriber equipment of this condition, then can find out switched opisthogenesis cell i load value be less than cell-of-origin i do not occur to be switched subscriber equipment switch initial load ρ ito be switched subscriber equipment, namely the 3rd to be switched subscriber equipment is found out, if to exist and the 3rd to be switched subscriber equipment is 5,6,9,10, then in the 3rd to be switched subscriber equipment 5,6,9,10, find out first satisfied switching and complete opisthogenesis cell i load value and be less than load balancing and start thresholding MLB thresholdthe to be switched subscriber equipment of this condition, namely the 4th to be switched subscriber equipment is found out, the 4th to be switched subscriber equipment 5 that namely in the 3rd to be switched subscriber equipment, RSRP strength difference is maximum, therefore the to be switched subscriber equipment 1 ~ 4 before the 4th to be switched subscriber equipment 5 and the 4th to be switched subscriber equipment 5, its corresponding Target cell T is switched to respectively 1~ T 5.
A kind of cell switching method that the embodiment of the present invention provides, before being switched by the subscriber equipment in cell-of-origin, this subscriber equipment is estimated the load variations that cell-of-origin and Target cell cause after handover, make the high capacity community of initiating load balancing switching, namely to be switched subscriber equipment is switched to corresponding Target cell to reduce the load of cell-of-origin by cell-of-origin, after avoiding to be switched subscriber equipment to switch, interference produced to cell-of-origin simultaneously and cause the negative gain that cell-of-origin load level rises, thus effectively reduce the load of high capacity community, improve resource utilization ratio.
For ease of better implementing the technical scheme of the embodiment of the present invention, the embodiment of the present invention is also provided for the relevant apparatus implementing such scheme.Wherein the implication of noun is identical with said method, and specific implementation details can explanation in reference method embodiment.
Please refer to Fig. 5, for the structural representation of a kind of communicator that the embodiment of the present invention provides, this communicator can be evolved base station eNB, base station controller (BSC, BaseStationController), radio network controller (RNC, RadioNetworkController) etc.
Wherein, this communicator comprises:
Determination module 501, for determining to be switched subscriber equipment in cell-of-origin and Target cell corresponding to this to be switched subscriber equipment;
Be understandable that, determine the Target cell that in cell-of-origin, to be switched subscriber equipment is corresponding, Target cell is the community in the adjacent area of cell-of-origin; Wherein, each to be switched subscriber equipment in cell-of-origin can a corresponding Target cell, but each to be switched subscriber equipment can have identical Target cell.
Module 502 is estimated in load, for for each to be switched subscriber equipment, respectively load is carried out to cell-of-origin and adjacent area thereof and Target cell corresponding to be switched subscriber equipment and adjacent area thereof and estimate iterative computation, wherein, estimate the load each time calculating from second time load and estimate calculating, carry out according to the result that calculating is estimated in a front load, until the difference that the load value that calculates and a front load estimate the load value calculated is estimated in cell-of-origin and each adjacent area thereof and Target cell and the present load of each adjacent area thereof be less than default error threshold;
In some embodiments, for each to be switched subscriber equipment, estimate in the process of iterative computation in load, execute first time load estimate calculating after load each time estimate calculating, the result estimating calculating according to a front load is all needed to carry out, namely calculating is estimated in second time load needs the result estimating calculating according to first time load to carry out, third time needs the result estimating calculating according to second time load to carry out, carry out load according to this and estimate iterative computation, until the difference that the load value that calculates and a front load estimate the load value calculated is estimated in cell-of-origin and each adjacent area thereof and Target cell and the present load of each adjacent area thereof be less than default error threshold, namely last load is estimated the difference that the load value obtained of calculating and a front load estimate the load value calculated and is less than default error threshold.
Handover module 503, for estimating iterative computation result according to load, selects changeable subscriber equipment to switch to be switched subscriber equipment.
A kind of communicator that the embodiment of the present invention provides, before being switched by the subscriber equipment in cell-of-origin, this subscriber equipment is estimated the load variations that cell-of-origin and Target cell cause after handover, make the high capacity community of initiating load balancing switching, namely to be switched subscriber equipment is switched to corresponding Target cell to reduce the load of cell-of-origin by cell-of-origin, after avoiding to be switched subscriber equipment to switch, interference produced to cell-of-origin simultaneously and cause the negative gain that cell-of-origin load level rises, thus effectively reduce the load of high capacity community, improve resource utilization ratio.
Preferably, please refer to Fig. 6, can also following modular unit be comprised in the communicator that the present embodiment provides, specific implementation is carried out to the method in said method embodiment.
In some embodiments, for determining the determination module 501 of to be switched subscriber equipment in cell-of-origin and Target cell corresponding to this to be switched subscriber equipment, can comprise and carry out specific implementation with lower unit:
Acquiring unit 5011, for for the subscriber equipment in cell-of-origin, the cell-of-origin Reference Signal Received Power RSRP intensity obtaining subscriber equipment and the RSRP intensity of all adjacent areas measured in cell-of-origin;
Be understandable that, its edge customer equipment that can be directed in cell-of-origin carries out the acquisition of information.
Determining unit 5012, if be greater than default handoff threshold for the difference of the RSRP intensity of maximum RSRP intensity in the RSRP intensity of all adjacent areas that measures in cell-of-origin and cell-of-origin, then determine that this subscriber equipment is to be switched subscriber equipment, adjacent area corresponding to maximum RSRP intensity is the Target cell of this to be switched subscriber equipment.
Further, load is estimated in module 502 and can be comprised:
Submodule 5021 is estimated in first load, for for each to be switched subscriber equipment, carries out first time load respectively estimate calculating to cell-of-origin and Target cell corresponding to be switched subscriber equipment;
Submodule 5022 is estimated in second load, for the load information according to the adjacent area received, trigger load next time and estimate calculating, and load is estimated result of calculation and be sent to each adjacent area, until the difference that the load value that calculates and a front load estimate the load value calculated is estimated in cell-of-origin and each adjacent area thereof and Target cell and the present load of each adjacent area thereof be less than default error threshold;
Wherein, the first load is estimated submodule 5021 and is also comprised with lower unit:
Computing unit 50211, if switch to the first load of Target cell and the second load of cell-of-origin behind the Target cell of correspondence for calculating this to be switched subscriber equipment;
Control unit 50212, to be sent to the adjacent area of described Target cell by the first load for controlling Target cell corresponding to this to be switched subscriber equipment, control the adjacent area that the second load is sent to described cell-of-origin by cell-of-origin.
Further, the communicator that the embodiment of the present invention provides also comprises sending module 504, for the guaranteed rate of to be switched subscriber equipment and the RSRP intensity of all adjacent areas that measures in cell-of-origin thereof are sent to corresponding Target cell.
Be understandable that, for each to be switched subscriber equipment, estimate after module 502 executes action in load, can think that the load before this to be switched subscriber equipment switching is estimated, need to be switched subscriber equipment, select the subscriber equipment satisfied condition to switch, wherein, using the subscriber equipment that satisfies condition as changeable subscriber equipment.
In some embodiments, the handover module 503 for selecting changeable subscriber equipment to carry out switching to be switched subscriber equipment can comprise and carries out specific implementation with lower unit:
Judging unit 5031, for for each to be switched subscriber equipment, if the first load of Target cell is less than load balancing startup thresholding after this to be switched subscriber equipment switches to corresponding Target cell, after then judging whether to exist the Target cell switching to correspondence, the last load of cell-of-origin is estimated result of calculation and is less than the to be switched subscriber equipment that load balancing starts thresholding;
First selected cell 5032, if after switching to corresponding Target cell for existence, the last load of cell-of-origin is estimated result of calculation and is less than the first to be switched subscriber equipment that load balancing starts thresholding, then the first to be switched subscriber equipment is chosen as changeable subscriber equipment;
Second selected cell 5033, if after not existing and switching to corresponding Target cell, the last load of cell-of-origin is estimated result of calculation and is less than the first to be switched subscriber equipment that load balancing starts thresholding, then the last load of cell-of-origin is estimated the 3rd to be switched subscriber equipment that result of calculation is less than the initial load of cell-of-origin and be chosen as changeable subscriber equipment;
Switch unit 5034, for switching changeable subscriber equipment.
In addition, in some embodiments, after determination module 501 determines to be switched subscriber equipment in cell-of-origin and Target cell corresponding to this to be switched subscriber equipment, first the to be switched subscriber equipment determined can be arranged in certain sequence, and then iterative computation is estimated in the load carried out before to be switched subscriber equipment switching;
Preferably, can also comprise in the communicator that the present embodiment provides:
Order module 505, for being arranged according to the order of sequence according to RSRP strength difference by be switched subscriber equipment, RSRP strength difference is the difference of the RSRP intensity of the corresponding Target cell that to be switched subscriber equipment measures and the RSRP intensity of cell-of-origin.
In some embodiments, to be switched subscriber equipment can be arranged by descending order according to RSRP strength difference, also can arrange by ascending order according to RSRP strength difference, wherein, RSRP strength difference is the difference of the RSRP intensity of the corresponding Target cell that to be switched subscriber equipment measures and the RSRP intensity of cell-of-origin.
In the present embodiment, undertaken being arranged as application scenarios analysis by descending order according to RSRP strength difference with just to be switched subscriber equipment.
The order be directed to by RSRP strength difference is descending arranges, then after the judging unit 5031 in handover module 503 executes judgement action, be also respectively used to perform following steps for the first selected cell 5032 and the second selected cell 5033 selecting changeable user:
First selected cell 5032, if after also switching to corresponding Target cell for existence, the last load of cell-of-origin is estimated result of calculation and is less than the first to be switched subscriber equipment that load balancing starts thresholding, then by the second maximum for RSRP strength difference in the first to be switched subscriber equipment to be switched subscriber equipment, and the to be switched subscriber equipment that in all to be switched subscriber equipmenies, RSRP strength difference is larger than the RSRP strength difference of the second to be switched subscriber equipment is chosen as changeable subscriber equipment;
Second selected cell 5033, if also for after not existing and switching to corresponding Target cell, the last load of cell-of-origin is estimated result of calculation and is less than the first to be switched subscriber equipment that load balancing starts thresholding, then estimating result of calculation in the last load of cell-of-origin is less than in the 3rd to be switched subscriber equipment of the initial load of cell-of-origin, by the 4th maximum for RSRP strength difference to be switched subscriber equipment, and the to be switched subscriber equipment that in all to be switched subscriber equipmenies, RSRP strength difference is larger than the RSRP strength difference of the 4th to be switched subscriber equipment is chosen as changeable subscriber equipment.
Wherein, after select changeable subscriber equipment to be switched subscriber equipment, switch unit 5034 performs the action switched changeable subscriber equipment.
Be understandable that, the communicator that the present embodiment provides, the function of its each functional module can according to the method specific implementation in said method embodiment, and its specific implementation process with reference to the associated description of said method embodiment, can repeat no more herein.
A kind of communicator that the embodiment of the present invention provides, before being switched by the subscriber equipment in cell-of-origin, this subscriber equipment is estimated the load variations that cell-of-origin and Target cell cause after handover, make the high capacity community of initiating load balancing switching, namely to be switched subscriber equipment is switched to corresponding Target cell to reduce the load of cell-of-origin by cell-of-origin, after avoiding to be switched subscriber equipment to switch, interference produced to cell-of-origin simultaneously and cause the negative gain that cell-of-origin load level rises, thus effectively reduce the load of high capacity community, improve resource utilization ratio.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the unit module in the device of foregoing description and device, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that program command is relevant, aforesaid program can be stored in a computer read/write memory medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), magnetic disc or CD etc. various can be program code stored medium.
Above a kind of cell switching method provided by the present invention and communicator are described in detail, for one of ordinary skill in the art, according to the thought of the embodiment of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims (14)

1. a cell switching method, is characterized in that, comprising:
Determine to be switched subscriber equipment in cell-of-origin and Target cell corresponding to described to be switched subscriber equipment;
For each to be switched subscriber equipment, respectively load is carried out to cell-of-origin and adjacent area thereof and Target cell corresponding to described to be switched subscriber equipment and adjacent area thereof and estimate iterative computation, wherein, estimate the load each time calculating from second time load and estimate calculating, carry out according to the result that calculating is estimated in a front load, until the difference that the load value that calculates and a front load estimate the load value calculated is estimated in cell-of-origin and each adjacent area thereof and Target cell and the present load of each adjacent area thereof be less than default error threshold;
Estimate iterative computation result according to load, from described to be switched subscriber equipment, select changeable subscriber equipment to switch.
2. method according to claim 1, is characterized in that, describedly determines the to be switched subscriber equipment in cell-of-origin and Target cell corresponding to described to be switched subscriber equipment, comprising:
For the subscriber equipment in cell-of-origin, the cell-of-origin Reference Signal Received Power RSRP intensity obtaining described subscriber equipment and the RSRP intensity of all adjacent areas measured in described cell-of-origin;
If the difference of the RSRP intensity of maximum RSRP intensity and described cell-of-origin is greater than default handoff threshold in the RSRP intensity of the described all adjacent areas measured in cell-of-origin, then determine that this subscriber equipment is to be switched subscriber equipment, adjacent area corresponding to described maximum RSRP intensity is the Target cell of this to be switched subscriber equipment.
3. method according to claim 1, is characterized in that, described for each to be switched subscriber equipment, carries out load respectively and estimates iterative computation, comprising cell-of-origin and adjacent area thereof and Target cell corresponding to described to be switched subscriber equipment and adjacent area thereof:
For each to be switched subscriber equipment, respectively first time load is carried out to cell-of-origin and Target cell corresponding to described to be switched subscriber equipment and estimate calculating, wherein, described first time load is estimated calculating and is comprised: if calculate this to be switched subscriber equipment to switch to the first load of Target cell and the second load of cell-of-origin behind corresponding Target cell, and control the adjacent area that described first load is sent to described Target cell by Target cell corresponding to this to be switched subscriber equipment, control the adjacent area that described second load is sent to described cell-of-origin by cell-of-origin;
For each community, according to the load information of the adjacent area received, trigger load next time and estimate calculating, and load is estimated result of calculation and be sent to each adjacent area, until the difference that the load value that calculates and a front load estimate the load value calculated is estimated in cell-of-origin and each adjacent area thereof and Target cell and the present load of each adjacent area thereof be less than default error threshold.
4. method according to claim 3, is characterized in that, described in carry out before first time load estimates calculating, comprising:
The guaranteed rate of described to be switched subscriber equipment and the RSRP intensity of all adjacent areas that measures in described cell-of-origin thereof are sent to corresponding Target cell.
5. method according to claim 3, is characterized in that, describedly estimates result of calculation according to load, selects changeable subscriber equipment to carry out switching and comprise from described to be switched subscriber equipment:
For each to be switched subscriber equipment, if the first load of Target cell is less than load balancing startup thresholding after this to be switched subscriber equipment switches to corresponding Target cell, then perform following steps:
After judging whether to exist the Target cell switching to correspondence, the last load of cell-of-origin is estimated result of calculation and is less than the first to be switched subscriber equipment that load balancing starts thresholding,
If exist, then described first to be switched subscriber equipment is chosen as changeable subscriber equipment, described changeable subscriber equipment is switched,
If do not exist, then the last load of cell-of-origin is estimated the 3rd to be switched subscriber equipment that result of calculation is less than the initial load of cell-of-origin and be chosen as changeable subscriber equipment, described changeable subscriber equipment is switched.
6. method according to any one of claim 1 to 5, is characterized in that, comprising:
Arranged according to the order of sequence according to RSRP strength difference by described to be switched subscriber equipment, described RSRP strength difference is the difference of the RSRP intensity of the corresponding Target cell that to be switched subscriber equipment measures and the RSRP intensity of cell-of-origin.
7. method according to claim 6, is characterized in that, describedly estimates result of calculation according to load, selects changeable subscriber equipment to switch, comprising from described to be switched subscriber equipment:
For each to be switched subscriber equipment, if the first load of Target cell is less than load balancing startup thresholding after this to be switched subscriber equipment switches to corresponding Target cell, then perform following steps:
After judging whether to exist the Target cell switching to correspondence, the last load of cell-of-origin is estimated result of calculation and is less than the first to be switched subscriber equipment that load balancing starts thresholding,
If exist, then by the second maximum for RSRP strength difference in described first to be switched subscriber equipment to be switched subscriber equipment, and the to be switched subscriber equipment that in all to be switched subscriber equipmenies, RSRP strength difference is larger than the RSRP strength difference of described second to be switched subscriber equipment is chosen as changeable subscriber equipment, described changeable subscriber equipment is switched
If do not exist, then estimating result of calculation in the last load of cell-of-origin is less than in the 3rd to be switched subscriber equipment of the initial load of cell-of-origin, by the 4th maximum for RSRP strength difference to be switched subscriber equipment, and the to be switched subscriber equipment that in all to be switched subscriber equipmenies, RSRP strength difference is larger than the RSRP strength difference of described 4th to be switched subscriber equipment is chosen as changeable subscriber equipment, switches described changeable subscriber equipment.
8. a communicator, is characterized in that, comprising:
Determination module, for determining to be switched subscriber equipment in cell-of-origin and Target cell corresponding to described to be switched subscriber equipment;
Module is estimated in load, for for each to be switched subscriber equipment, respectively load is carried out to cell-of-origin and adjacent area thereof and Target cell corresponding to described to be switched subscriber equipment and adjacent area thereof and estimate iterative computation, wherein, estimate the load each time calculating from second time load and estimate calculating, carry out according to the result that calculating is estimated in a front load, until the difference that the load value that calculates and a front load estimate the load value calculated is estimated in cell-of-origin and each adjacent area thereof and Target cell and the present load of each adjacent area thereof be less than default error threshold;
Handover module, for estimating iterative computation result according to load, selects changeable subscriber equipment to switch from described to be switched subscriber equipment.
9. device according to claim 8, is characterized in that, described determination module comprises:
Acquiring unit, for for the subscriber equipment in cell-of-origin, the cell-of-origin Reference Signal Received Power RSRP intensity obtaining described subscriber equipment and the RSRP intensity of all adjacent areas measured in described cell-of-origin;
Determining unit, if be greater than default handoff threshold for the difference of the RSRP intensity of maximum RSRP intensity and described cell-of-origin in the RSRP intensity of the described all adjacent areas measured in cell-of-origin, then determine that this subscriber equipment is to be switched subscriber equipment, adjacent area corresponding to described maximum RSRP intensity is the Target cell of this to be switched subscriber equipment.
10. device according to claim 8, is characterized in that, described load is estimated module and comprised:
Submodule is estimated in first load, for for each to be switched subscriber equipment, carries out first time load respectively estimate calculating to cell-of-origin and Target cell corresponding to described to be switched subscriber equipment;
Submodule is estimated in second load, for the load information according to the adjacent area received, trigger load next time and estimate calculating, and load is estimated result of calculation and be sent to each adjacent area, until the difference that the load value that calculates and a front load estimate the load value calculated is estimated in cell-of-origin and each adjacent area thereof and Target cell and the present load of each adjacent area thereof be less than default error threshold;
Wherein, described first load is estimated submodule and is comprised:
Computing unit, if switch to the first load of Target cell and the second load of cell-of-origin behind the Target cell of correspondence for calculating this to be switched subscriber equipment;
Control unit, to be sent to the adjacent area of described Target cell by described first load for controlling Target cell corresponding to this to be switched subscriber equipment, control the adjacent area that described second load is sent to described cell-of-origin by cell-of-origin.
11. devices according to claim 10, is characterized in that, described device also comprises:
Sending module, for being sent to corresponding Target cell by the guaranteed rate of described to be switched subscriber equipment and the RSRP intensity of all adjacent areas that measures in described cell-of-origin thereof.
12. devices according to claim 10, is characterized in that, described handover module comprises:
Judging unit, for for each to be switched subscriber equipment, if the first load of Target cell is less than load balancing startup thresholding after this to be switched subscriber equipment switches to corresponding Target cell, after then judging whether to exist the Target cell switching to correspondence, the last load of cell-of-origin is estimated result of calculation and is less than the to be switched subscriber equipment that load balancing starts thresholding;
First selected cell, if after switching to corresponding Target cell for existence, the last load of cell-of-origin is estimated result of calculation and is less than the first to be switched subscriber equipment that load balancing starts thresholding, then described first to be switched subscriber equipment is chosen as changeable subscriber equipment;
Second selected cell, if after not existing and switching to corresponding Target cell, the last load of cell-of-origin is estimated result of calculation and is less than the first to be switched subscriber equipment that load balancing starts thresholding, then the last load of cell-of-origin is estimated the 3rd to be switched subscriber equipment that result of calculation is less than the initial load of cell-of-origin and be chosen as changeable subscriber equipment;
Switch unit, for switching changeable subscriber equipment.
13. devices according to any one of claim 9 to 12, it is characterized in that, described device also comprises:
Order module, for being arranged according to the order of sequence according to RSRP strength difference by described to be switched subscriber equipment, described RSRP strength difference is the difference of the RSRP intensity of the corresponding Target cell that to be switched subscriber equipment measures and the RSRP intensity of cell-of-origin.
14. devices according to claim 13, is characterized in that:
Described first selected cell, if after also switching to corresponding Target cell for existence, the last load of cell-of-origin is estimated result of calculation and is less than the first to be switched subscriber equipment that load balancing starts thresholding, then by the second maximum for RSRP strength difference in described first to be switched subscriber equipment to be switched subscriber equipment, and the to be switched subscriber equipment that in all to be switched subscriber equipmenies, RSRP strength difference is larger than the RSRP strength difference of described second to be switched subscriber equipment is chosen as changeable subscriber equipment;
Described second selected cell, if also for after not existing and switching to corresponding Target cell, the last load of cell-of-origin is estimated result of calculation and is less than the first to be switched subscriber equipment that load balancing starts thresholding, then estimating result of calculation in the last load of cell-of-origin is less than in the 3rd to be switched subscriber equipment of the initial load of cell-of-origin, by the 4th maximum for RSRP strength difference to be switched subscriber equipment, and the to be switched subscriber equipment that in all to be switched subscriber equipmenies, RSRP strength difference is larger than the RSRP strength difference of described 4th to be switched subscriber equipment is chosen as changeable subscriber equipment.
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