CN103004257A - Method and device for target cell prediction - Google Patents

Method and device for target cell prediction Download PDF

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Publication number
CN103004257A
CN103004257A CN2011800011301A CN201180001130A CN103004257A CN 103004257 A CN103004257 A CN 103004257A CN 2011800011301 A CN2011800011301 A CN 2011800011301A CN 201180001130 A CN201180001130 A CN 201180001130A CN 103004257 A CN103004257 A CN 103004257A
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cell
mrs
ing
ring
prediction
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CN103004257B (en
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赵红霞
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/324—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by mobility data, e.g. speed data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Disclosed are a method and device for predicting a target cell, pertaining to the field of communication networks and capable of improving the accuracy rate of predicting the next cell that an MRS will enter. In the technical solution provided in the embodiments of the present invention, by way of acquiring the motion rules of the MRS, the target cell that the MRS will enter is predicted according to the MRS motion rules acquired, the current cell where the MRS is located, and information about the predetermined number of cells that the MRS passes through when switching, and when the actual cell that the MRS actually enters when switching and the target cell are not the same, calibration is performed or the MRS motion rules are re-acquired. The technical solution provided in the embodiments of the present invention may be used when predicting the next cell to be entered by the MRS or a terminal.

Description

A kind of method and device for predicting Target cell
A kind of method and device technical field for predicting Target cell
The present invention relates to technical field of communication network, more particularly to a kind of method and device for predicting Target cell.Background technology
When user is on bullet train, due to the shield effectiveness of fast-changing channel characteristics, and car body, cause UE (the User Equi pment, user terminal in compartment）Link-quality between terminal and roadside base station declines, and cutting off rate and handover failure rate are all higher, MRS (mob i le re lay s ta t ion, mobile-relay station then occur）, MRS is located in the relay station on the vehicles or on movable carrier, when UE is located on the vehicles, UE is set up with ground base station by MRS and is connected, so, the shielding problem of the vehicles can be solved, terminal capability consumption and the expense eated dishes without rice or wine is reduced.
, it is necessary to be rapidly completed switching when switching between MRS on a vehicle and each base station, and MRS needs to relay a large amount of UE data, it is necessary to instantaneously obtain ample resources from the base station of access.MRS on a vehicle is moved with the vehicles, prior art be predicted MRS on a vehicle it is mobile when, because the movement of the vehicles has regularity, next cell that MRS or terminal will enter directly is predicted generally according to MRS movement history recording；Or, cell and movement history recording are presently according to MRS, the probability of the cell adjacent with current area is counted, the big cell of probability is predicted as next cell that MRS will enter.
However, when network changes or vehicles operation changes, prior art prediction put S it is mobile when, the correctness of prediction it is relatively low or can not it is correctly predicted go out the next cells that will enter of MRS.The content of the invention
Embodiments of the invention provide a kind of method and device for predicting Target cell, can improve the accuracy for next cell that prediction MRS will enter.
To reach above-mentioned purpose, embodiments of the invention are adopted the following technical scheme that： A kind of method for predicting Target cell, including：
Obtain mobile-relay station MRS movement rule；
The cell information of cell, the predetermined number that MRS switchings are passed through is currently located according to the MRS of acquisition movement rule, MRS, the Target cell that the MRS will enter is predicted；
When the cell switched into when MRS is actual and the inconsistent Target cell of prediction, and it is corrected or reacquires the movement rule of the MRS.
A kind of device for predicting Target cell, including：
Mobile learning unit, the movement rule for obtaining mobile-relay station MRS；
Moving projection execution unit, movement rule, MRS for the MRS according to acquisition are currently located cell, the cell information for the predetermined number that MRS switchings are passed through, and predict the Target cell that the MRS will enter；
Mobile authentication unit, when cell and the Target cell of prediction for being switched into when MRS is actual are inconsistent, and is corrected or reacquires the movement rule for putting S.
The embodiment of the present invention provides a kind of method and device for predicting Target cell, by the movement rule for obtaining mobile-relay station MRS, the cell information of cell, the predetermined number that MRS switchings are passed through is currently located according to the MRS of acquisition movement rule, MRS, predict the Target cell that the MRS will enter, when the cell switched into when MRS is actual and the inconsistent Target cell of prediction, and it is corrected or reacquires the movement rule of the MRS.With in the prior art predict MRS it is mobile when, the correctness of prediction it is relatively low or can not it is correctly predicted go out the next cells that will enter of MRS compare, scheme provided in an embodiment of the present invention can be by verifying to the actual cells switched into of MRS and the Target cell of prediction, to change incorrect information of forecasting, the accuracy for next cell that prediction MRS will enter can be improved.Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, the required accompanying drawing used in embodiment or description of the prior art will be briefly described below, apparently, drawings in the following description are only some embodiments of the present invention, for those of ordinary skill in the art, without having to pay creative labor, other accompanying drawings can also be obtained according to these accompanying drawings. Fig. 1 is a kind of flow chart of the method for prediction Target cell that the embodiment of the present invention 1 is provided；Fig. 2 is a kind of block diagram of the device for prediction Target cell that the embodiment of the present invention 1 is provided；Fig. 3 is a kind of flow chart of the method for prediction Target cell that the embodiment of the present invention 2 is provided；The schematic diagram of the switching record information sequentially preserved in the MRS that Fig. 4 provides for the embodiment of the present invention 2；Fig. 5 is the MRS of the offer of the embodiment of the present invention 2 with the schematic diagram of the mobile route of vehicle；Fig. 6 is the flow chart of the method for the acquisition ownership shift(ing) ring that the embodiment of the present invention 2 is provided；Fig. 7 is the flow chart of the method for the fundamental forecasting that the embodiment of the present invention 2 is provided；
Fig. 8 is a kind of block diagram of the device for prediction Target cell that the embodiment of the present invention 2 is provided；Fig. 9 is the block diagram for the mobile learning unit that the embodiment of the present invention 2 is provided；
Figure 10 is the block diagram for the moving projection execution unit that the embodiment of the present invention 2 is provided.Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.
Embodiment 1
The embodiment of the present invention provides a kind of method for predicting Target cell, as shown in figure 1, this method includes：Step 101, mobile-relay station MRS movement rule is obtained；
MRS (mob i le re l ay s ta t ion, mobile-relay station）, lay on a vehicle or on movable carrier, the trunk desk for receiving and forwarding radio signal.
Step 102, the cell information that cell, the MRS switch the predetermined number passed through is currently located according to the MRS of acquisition movement rule, MRS, predicts the Target cell that the MRS will enter；
Step 103, when the cell switched into when MRS is actual and the inconsistent Target cell of prediction, and it is corrected or reacquires the movement rule for putting S.
The embodiment of the present invention provides a kind of method for predicting Target cell, by the movement rule for obtaining mobile-relay station MRS, S movement rule, MRS are put according to acquisition and is currently located cell, the cell information for the predetermined number that MRS switchings are passed through, the Target cell that the MRS will enter is predicted, works as MRS When the cell switched into and the inconsistent Target cell of prediction, and it is corrected or reacquires the movement rule of the MRS.With in the prior art predict MRS it is mobile when, the correctness of prediction it is relatively low or can not it is correctly predicted go out the next cells that will enter of MRS compare, scheme provided in an embodiment of the present invention can be by verifying to the actual cells switched into of MRS and the Target cell of prediction, to change incorrect information of forecasting, the accuracy for next cell that prediction MRS will enter can be improved.
The embodiment of the present invention provides a kind of device for predicting Target cell, and the device can be to put S, or moving projection device, as shown in Fig. 2 the device includes：Mobile learning unit 201, moving projection execution unit 202, mobile authentication unit 203.
Mobile learning unit 201, the movement rule for obtaining mobile-relay station MRS；
Moving projection execution unit 202, movement rule, MRS for the MRS according to acquisition are currently located cell, the cell information for the predetermined number that MRS switchings are passed through, and predict the Target cell that the MRS will enter；
Mobile authentication unit 203, when cell and the Target cell of prediction for being switched into when MRS is actual are inconsistent, and is corrected or reacquires the movement rule of the MRS.
The embodiment of the present invention provides a kind of device for predicting Target cell, pass through mobile learning unit, obtain the movement rule that mobile-relay station puts S, then moving projection execution unit, S movement rule, MRS are put according to acquisition and is currently located cell, the cell information for the predetermined number that MRS switchings are passed through, the Target cell that S will enter is put described in prediction, when the cell switched into when MRS is actual and the inconsistent Target cell of prediction, mobile authentication unit is corrected or reacquired the movement rule of the MRS.With in the prior art with the prior art predict MRS it is mobile when, the correctness of prediction it is relatively low or can not it is correctly predicted go out the next cells that will enter of MRS compare, scheme provided in an embodiment of the present invention can improve the accuracy for next cell that prediction MRS will enter.
Embodiment 2
The embodiment of the present invention provides a kind of method for predicting Target cell, as shown in figure 3, this method includes：Step 301, mobile-relay station MS movement rule is obtained；
MRS (mob i le relay s ta t ion, mobile-relay station）, lay on a vehicle or removable On dynamic load body, the trunk desk for receiving and forwarding radio signal.
Specifically, all switching record informations sequentially preserved in S according to putting, obtain the movement rule for putting S, and switching record information includes MRS and switches each cell lived through and MRS in the resident duration of each cell.All switching record informations sequentially preserved in wherein MRS, Mei Ge Round circles as shown in Figure 4 represent a cell, "/" left-hand digit that cell in the embodiment of the present invention is referred specifically in the order Round of switching record of the digitized representation above the base station Round circles in cell is cell ID, numeral on the right of "/" represents the resident durations of MRS in the cell, the cell that for example MRS first is switched into, it is 1/60 in circle, represents that MRS is resident 60 minutes in the cell for being designated 1.
The movement rule for putting S is obtained, following sub-step is specifically included：
Step 3010, the MRS according to all switching record informations sequentially preserved in the MRS is resident duration in each cell, calculates the average value of the resident duration；
The average value of resident duration is calculated according to Tt=(Tr (1)+Tr (2)+-+Tr (i)+- Tr (N))/N, wherein, Tr (i) represents the resident duration in i-th of resident cell, i-th of resident cell can be represented with C (i), Tt represents the average value of resident duration, it should be noted that, N switches the effective sample number collected in historical information to be current, Ν values are [1, Nmax], if i.e. current sample number is more than Nmax, Nmax newest sample value is then taken to be calculated.For example in Fig. 4, N=29, the initial Tt of calculating is that the average value that 29 cells are resident duration in figure is the (minutes of Tt 6）.
Step 3011, according to the average value for calculating the resident duration, candidate home cell is determined, the candidate home cell is used to recognize ownership shift(ing) ring；
Home cell is docked in the cell that public transit vehicle master station accesses by MRS, for the MRS residence times most long cell, and ownership shift(ing) ring, i.e. MRS following vehicles can be obtained according to the home cell and are finally docked in home cell from home cell.
Specifically, it is determined that the mode of candidate home cell is：
As Tr (i)>Tt and Tr (i)>During Trh, it is the candidate home cell to determine the corresponding cell C (i) of the Tr (i)；
Wherein, Tr (i) is to be resident duration in C (i) cells, and the C (i) is that the MRS switches the cell passed through, and the i is to be more than and the natural number equal to 1, Tt is the average value calculated, described Trh is resident durations of the MRS in candidate home cell, the initial seasonal Tt=Trh.
When MRS is moved, it experienced new cell, MRS is compared in the resident duration of these cells with Tt and Trh successively, if MRS is more than Tt in the resident duration of C (i+n) this cell, and during also greater than Trh, it is determined that C (i+n) is new candidate home cell.
In as shown in Fig. 4, first cell of record is candidate home cell, when continuously identifying that two equal candidates belong to shift(ing) ring according to candidate home cell, when candidate's ownership shift(ing) ring is referred to as ownership shift(ing) ring, candidate home cell is known as home cell.
Step 3012, according to the candidate home cell, the ownership shift(ing) ring is obtained, and determine that the candidate home cell is home cell；
Ownership shift(ing) ring mentioned here is a shift(ing) ring of all cells composition sequentially undergone in the moving process of MRS following vehicles, the ownership shift(ing) ring is not a simple ring in a mobile network, but the loop that MRS maps in a mobile network after being moved with car operation circuit ring.For example, shown in Fig. 5,4->5->6->7->4 be a mobile loop, is not the ownership shift(ing) ring that the present invention is defined, but the 1- shown in Fig. 5>2->3->4->5->6->7->4-> 3->2->1 is only the ownership shift(ing) ring that the present invention is defined.
Further, as shown in fig. 6, according to the candidate home cell, obtaining the ownership shift(ing) ring, including step in detail below：
Step 601, according to the candidate home cell, the first candidate ownership shift(ing) ring and the second candidate ownership shift(ing) ring are obtained；
Specifically, step 6010, by all switching record informations put and sequentially preserved in S, inquire about successively after the C (i), the mark for each cell that the MRS is switched into, acquisition is identical with the mark of the C (i) and in first community C (i+M) of the residence time more than Tt of the C (i);
As shown in figure 4, the 1st cell in record is candidate home cell, the mark CID (1)=1 of candidate home cell is then based on the identification that C1 carries out ownership shift(ing) ring.When inquire record in the 3rd cell mark it is identical with the mark of the 1st cell in record, i.e. CID (3)=1.
Here, because the resident duration of regulation candidate home cell needs to be more than the average value of the resident duration calculated, therefore, the 1st cell in Fig. 4, the 2nd cell, the 3rd cell, i.e. 1->2->1 It is not desired candidate's ownership shift(ing) ring, proceeds the identification of shift(ing) ring.
Step 6011, according to the first community of acquisition, the first candidate ownership shift(ing) ring is obtained, the first candidate ownership shift(ing) ring is { C (i), C (i+1), C (i+2) ,-C (i+M) };
For example, inquire record in the 15th cell mark it is identical with the mark of the 1st cell in record, that is CID (15)=1, and C (15) resident duration Tt (15)=15 minute, more than the average value of the resident duration calculated, then now obtains the first candidate ownership shift(ing) ring, for MC1={ C (1), C (2), C (3), --- 0 (15) }.
Step 6012, continue to inquire about each cell that the MRS is switched into after the C (i+M), acquisition is identical with the mark of the C (i) and the C (i+M) mark and in the C (i+M) second community C (i+N) of the residence time more than Tt;
For example, the mark of the 29th cell inquired in record is identical with the mark of the 1st cell in record and the 15th cell.
Step 6013, according to the second community of acquisition, obtain the second candidate ownership shift(ing) ring, second candidate ownership shift(ing) ring for C (i+M), C (i+M+1), C (i+M+2) ,-" C (i+M+N) }.
For example, C (29) resident duration Tt (29)=15 minute ＞ 6 minutes, here it is within 6 minutes the average value of the resident duration calculated, then now obtain the second candidate ownership shift(ing) ring, for MC2={ C (15), C (16)
C(17), ---0(29)}。
Step 602, judge whether the first candidate ownership shift(ing) ring and second candidate ownership shift(ing) ring are identical；
Specifically, judge whether L { MC1 } is equal with L { MC2 }, wherein L { MC1 } represents the cell number included in the first candidate ownership shift(ing) ring, L { MC2 } represents the cell number included in the second candidate ownership shift(ing) ring；
When L { MC1 } and L { MC2 } are unequal, then the first candidate ownership shift(ing) ring and second candidate ownership shift(ing) ring are differed；Now need to obtain new candidate's ownership shift(ing) ring in the way of candidate's ownership shift(ing) ring is obtained again；
When L { MC1 } is equal with L { MC2 }, MC1 and the mark of the cell on MC2 correspondence positions are compared successively Whether consistent know；Compared since MCI with MC2 the 1st cell, wherein, as long as the mark of any of MC1 and MC2 cells is different, then MC1 and MC2 is just differed；When all cells in MC1 and MC2 mark all when, then MC1 is identical with MC2.
Step 603, obtain new candidate in the way of candidate's ownership shift(ing) ring is obtained again when first candidate belongs to shift(ing) ring and second candidate ownership shift(ing) ring is differed and belong to shift(ing) ring；
Now, step 6010 is performed to step 6013, reacquires new candidate's ownership shift(ing) ring；Step 604, when first candidate ownership shift(ing) ring is identical with second candidate ownership shift(ing) ring, it is that first candidate belongs to shift(ing) ring or second candidate ownership shift(ing) ring then to determine the ownership shift(ing) ring, and determines that the candidate home cell is home cell；
As shown in Figure 4, the ownership shift(ing) ring of determination is MCh={ C (1), C (2), C (1), C (2), C (3), C (4), C (5), C (6), C (7), C (4), C (3), C (2), C (1), C (2), C (1) }, wherein C (l) is home cell.
After all switching record informations sequentially preserved in S according to putting, the movement rule of study to MRS, next cell that MRS will enter then is predicted according to the movement rule learnt.
Step 302, the cell information that cell, the MRS switch the predetermined number passed through is currently located according to the MRS of acquisition movement rule, MRS, predicts the Target cell that the MRS will enter；
Further, the cell of the predetermined number is specifically as follows the cell that MRS following vehicles movement a cycle is passed through, here a cycle refers to MRS from home cell, return home cell, the Target cell that predicting the MRS will enter can use following two modes, wherein, a kind of mode is fundamental forecasting method, and another way is extension Forecasting Methodology.
Specifically, as shown in fig. 7, fundamental forecasting method：
Step 701, in the ownership shift(ing) ring, the number J, C (W) calculated with C (W) mark identical cell puts S for described in and is currently located cell;
The mark identical cell of cell is currently located with MRS in ownership shift(ing) ring, referred to as MRS is currently located the matching cell of cell.Whether can be preserved with array L (i) in ownership shift(ing) ring is the information for putting the matching cell that S is currently located cell, wherein i represents position of the cell on ownership shift(ing) ring, if it is 1 that matching cell, which is then set on L (i) relevant positions, then set L (i) corresponding if not matching cell It is 0 on position.So, the number J with C (W) mark identical cell can be drawn by being counted to 1 in L (i) arrays.
Step 702, as J=0, MC W+1 are set) it is sky NULL, wherein, the Target cell that MC (W+1) will enter for the MRS that predicts；
For example, when C (W) is when being designated 8, in the ownership shift(ing) ring of above-mentioned determination, 8 cell is not designated, then is illustrated, C (W) cell not present invention determine that ownership shift(ing) ring in, it is thus impossible to make effective prediction, it is sky NULL that can set MC (W+1), wherein, the Target cell that MC (W+1) will enter for the MRS of prediction.
Step 703, as J=l, prediction MC (W+1) is the Target cell that the MRS will enter, wherein, the MC (W+1) is next cell of MC (W) in the ownership shift(ing) ring, and the MC (W) is with belonging to the cell represented in shift(ing) ring described in the C (W) mark identical；
For example, when C (W) is when being designated 5, in the ownership shift(ing) ring of above-mentioned determination, only the 7th cell is designated 5, it is the Target cell that MRS will enter that then can directly predict the 8th cell in ownership shift(ing) ring, that is, belong to be designated in shift(ing) ring 6 cell.
Step 704, J is worked as>When 1, the mark of previous cell of this J cell in the ownership shift(ing) ring, the number K with the C (W-1) mark identical cell are calculated respectively;
For example, when C (W) is when being designated 2, in the ownership shift(ing) ring of above-mentioned determination, one have four cells be designated 2, so, the Target cell that MRS will enter cannot directly be determined, inquiry this four is needed to be designated the mark of the previous cell of 2 cell, it is whether identical with the mark of the MRS cells just switched, if the cell that MRS had just switched is designated 1, now, it is determined that ownership shift(ing) ring in, the cell for being designated 1 of the previous cell of 2 cell is designated, one has 3, at this moment K=3.
Step 705, as K=l, prediction MC (W+1) is the Target cell that the MRS will enter, wherein, the mark of the C (W-l) is identical with the mark of MC (W-l) in the ownership shift(ing) ring；
For example, when C (W) is when being designated 2, if that puts the cell that S had just switched is designated 1, it is assumed that a new ownership shift(ing) ring is { C (1), C (2), C (3), C (2), C (4), C (2) }, it can be drawn according to step 704, K=l, such C (3) is the Target cell that MRS will enter.
Step 706, K is worked as>When 1, according to J>1 method continues to calculate, will until predicting the MRS The Target cell to be entered；
Further, K is worked as>When 1, continue ownership shift(ing) ring in inquiry with C 0V-2) mark identical cell, if ownership shift(ing) ring in inquire one and C 0V-2) mark identical cell, ^ Jia are set to MC (W-2), then can predict the Target cell that MC (W+1) will enter for MRS in ownership shift(ing) ring；If the mark that two and two or more cell are inquired in ownership shift(ing) ring is identical with C (W-2) mark, then need to continue inquiry and C (W- 3) mark identical cell in ownership shift(ing) ring, until the Target cell that the MRS will enter can be predicted.
Step 707, when inquiring C [W- (W-1)] cell, when having the mark of G cell identical with the C [W- (W-1)] mark in the ownership shift(ing) ring, the next cell for predicting any one cell in the G cell is the Target cell that the MRS will enter.
It should be noted that fundamental forecasting method is applicable not only to initial forecast, it is also applied for repeating to predict.Further, the Target cell that can also will be entered using a kind of simple method prediction MRS, that is, extend Forecasting Methodology：
When the mark that MRS is currently located cell is identical with the mark of Target cell that the last time MRS predictions MRS will enter, i.e. the last prediction is successful, i.e. when the C (W) mark is identical with the MC (W) mark, the Target cell that the MRS, which can directly be predicted, to be entered is MC 0V+1), wherein C (W) puts S for described in and is currently located cell, the cell that MC (W) will enter for the MRS of the last prediction, MC 0V+1) it is the next cell for belonging to MC (W) in shift(ing) ring；
When the last prediction of failure, then it can not be further continued for being predicted using extension Forecasting Methodology, the Target cell that MRS will enter can be predicted using fundamental forecasting method.
It should be noted that, the Target cell that prediction MRS will enter can be MRS predictions, it can also be an independent equipment moving projection server to predict Target cell that MRS will enter, wherein, moving projection server is by receiving the predictions request that MRS is sent, the historical record specifically switched recently is carried in predictions request, if MRS is in the resident duration of a upper cell, , a upper cell refers to a upper cell for current area, cut out the identifier of a cell and incision current area, and MRS cuts the time of current area.Then moving projection server completes this prediction according to the predictions request message received, is receiveed the response by predictions request and returns to MRS, predictions request, which is receiveed the response, includes predicted MRS The Target cell that will enter, and it is expected that in the resident duration of coding cell；Or,
The function of moving projection is completed by other network equipments in addition to MRS, specifically, behind MRS switching cells, the information switched every time is gathered by access controller, then moving projection server is sent to by moving projection request, moving projection server preserves MRS handover information, and current cell information of the moving projection server according to included in moving projection request message moves prediction, and then will be predicted the outcome by moving projection response returns to RNC.
Step 303, the MRS sends resource reservation request to the Target cell, the resource reservation request includes using the duration reserved resource quantity, the earliest use time using reserved resource and use reserved resource needed for the MRS, and resource is reserved for indicating that the Target cell distributes for the MRS；
It should be noted that to Target cell send resource reservation request can also be access controller, access controller receive moving projection server transmission moving projection response after sent to Target cell.
Step 304, the Target cell receives the resource reservation request that the MRS is sent, and the resource reservation request includes using reserved resource quantity, the earliest use time using reserved resource and the duration using reserved resource needed for the MRS；
Step 305, the Target cell, according to the resource reservation request, is that the MRS sets up the reserved resource of connection distribution；
Specifically, the base station of Target cell is according to Current resource service condition, the resource reservation request received, the resource used for needed for MRS distributes MRS, and sets time and duration that the resource used needed for MS can begin to use.
Step 306, the Target cell sends reserved resource allocation to the MRS and responded, and resource is reserved into the distribution of work to be designated as the MRS；
The MRS is received after reserved resource allocation response, can cut Target cell when the earliest time using reserved resource starts, and is set up and connected using reserved resource, can also cut other cells.
Step 307, after the MRS enters new cell, judge whether the cell that the MRS newly enters is identical with the Target cell；
When the movement of MRS following vehicles, it is necessary to judge whether the cell that MRS newly enters is identical with Target cell when switching into new cell, because MRS may be with entering the Target cell predicted, it is also possible to due to Car operation circuit changes, interim to enter other cells, it is also possible to due to mobile network during operation in part by random disturbances, cause prediction error so that the new cell that MRS is switched into is different with the cell of prediction.
Step 308, when the cell that the MRS newly enters is identical with the Target cell, then connection is set up using the reserved resource；
When the cell that the MRS newly enters is identical with the Target cell, that is, illustrate that MRS switches into is the cell that resource has been reserved for it.It should be noted that MRS is when switching over decision-making, prioritizing selection has reserved the cell of resource for it, if the cell is not faced in area's list what MRS can access, MRS selects new switching cell according to switching criterion, and initiates switching flow.
When the cell that MRS newly enters and the Target cell of prediction are same cell, the resource of advance reservation can be used to set up connection, the quantity of the resource used needed for S is put because now reserved resource meets, so, with in the prior art each cell regularly for MRS reserve resource compared with, scheme provided in an embodiment of the present invention does not result in the waste of resource, improves resource reservation accuracy rate and improves the service efficiency of resource.
Step 309, when the cell that the MRS newly enters is differed with the Target cell, put cell that S newly enters by described to the Target cell and send resource reservation cancellation request, so that the Target cell reclaims the reserved resource or according to B=B immediatelyQ - BQ* [Tr (i)-T (i)]/Tr (i) gradually decreases the resource quantity of the reserved resource；
Wherein, B is the resource quantity of the reserved resource gradually decreased, B.For the resource quantity of the reserved resource, Tr (i) is the use duration of the reserved resource, and the earliest time that T (i) resources for needed for distance are used starts the time crossed；
Specifically, MRS sends resource reservation cancellation request to the MRS cells newly entered, then the cell that MRS newly enters is received after resource reservation cancellation request, and resource reservation cancellation request is sent to Target cell, so that the Target cell reclaims the reserved resource.With in the prior art, when MRS changes because of network or vehicles operation changes, the cell for having reserved resource is not entered into, these resources can't be reclaimed to compare, when scheme provided in an embodiment of the present invention can not enter into the cell of prediction in MRS, it is automatic to reclaim reserved resource, improve the service efficiency of resource. Step 310, the Target cell reclaims reserved resource；
Following any mode can be used：
Mode one：When receiving the resource reservation cancellation request that MRS is sent by the MRS cells newly entered, all reserved resources are reclaimed immediately；
Mode one：When MRS is started without reaching in reserved resource using earliest time, the resource quantity of the reserved resource is gradually decreased.
Specifically, according to B=BQ - BQ* [Tr (i)-T (i)]/Tr (i) gradually decreases the resource quantity of the reserved resource, wherein, B is the resource quantity of the reserved resource gradually decreased, B.For the resource quantity of the reserved resource, Tr (i) is the use duration of the reserved resource, and the earliest time that T (i) resources for needed for distance are used starts the time crossed.When having arrived MRS and can use the duration of reserved resource, reserved resource has all been reclaimed.
Step 311, when the cell that MRS is switched into and the inconsistent Target cell of prediction, it is corrected or reacquires the movement rule for putting S.
It should be noted that, if car operation changes temporarily, or the reason such as unstable of network can all cause moving projection mistake, therefore the mistake for finding and correcting in time movement rule is critically important to improving prediction accuracy, here, movement rule is to determine home cell and ownership shift(ing) ring according to MRS switching record.Due to the complexity and randomness of network, it is required that the cost that moving projection is correctly paid completely is huge, in addition, it is incorrect that blunt hardly possible is judged as the movement rule because of once mistake, thereby, it is ensured that the complete signification of ownership shift(ing) ring of identification is little, but the prediction of mistake is also nonsensical, can cause the wasting of resources.Therefore it is necessary mistake to be controlled, and scheme provided in an embodiment of the present invention proposes a kind of three-level movement rule verification scheme to find mistake in time as much as possible and correct mistake.
The validity of moving projection is determined by two factors：One be Spatial Dimension the degree of accuracy, one be time dimension the degree of accuracy.Switched into a MRS in the prediction of cell, when only the prediction on the two latitudes is all correct, just think that this prediction is accurate.In scheme provided in an embodiment of the present invention, the prediction accuracy of Spatial Dimension is the prediction accuracy for the mark that Target cell is switched into the MRS of prediction, if the mark that prediction MRS switches into cell of the mark of Target cell with actually switching into is consistent, then it is assumed that this prediction Spatial Dimension is accurate.Other scheme provided in an embodiment of the present invention, when Between dimension prediction accuracy be to MRS incision enter new cell in after, be resident duration prediction accuracy.The validity of moving projection is verified, checking partial and two stages of overall checking can be divided into；When MRS often switches into a new cell, need to carry out checking partial, when the new cell that MRS is switched into is consistent with the cell that the MRS predicted enters, then illustrate that current moving projection is correct recently, local correction need not be carried out, when the cell that the MRS of the new cell that MRS is switched into and prediction enters is inconsistent, then illustrate that current moving projection is wrong recently, then starts error-checking mechanism and verified.
When MRS returns to home cell, after being terminated using the prediction of ownership shift(ing) ring as a predetermined period, carry out overall checking, now, the three-level movement rule verification scheme provided according to embodiments of the present invention, the new cell that verification MRS is switched into successively and the cell that the MRS of prediction enters, are detailed below three-level movement rule verification scheme：
Based in a predetermined period, the moving projection carried out according to ownership shift(ing) ring mistake in multiple cells can use first order movement rule verification scheme first：
According to《 = Ν.κ /NN, calculate movement rule availability；
Wherein,《For movement rule availability, movement rule availability shows the effective percentage according to ownership shift(ing) ring Accurate Prediction, Ν.κFor in the ownership shift(ing) ring, MC 0V+1) mark it is identical with the mark of the MRS cells actually entered, and the resident duration of the MC (W+1) resides in the number of the duration identical cell of the cell actually entered with the MRS, next cell that MC (W+1) will enter for the MRS of prediction, NNFor the number of the cell included in the ownership shift(ing) ring；
When《< «tWhen, the ownership shift(ing) ring is redefined, wherein《tFor movement rule availability threshold value；It should be noted that《, set according to the practical experience of staff, work as a< «tWhen, show that the prediction accuracy based on the ownership shift(ing) ring is very low, it is impossible to be used further to moving projection, restarting is belonged into shift(ing) ring identification process, new ownership shift(ing) ring is identified.
Work as a> «tOr a=tWhen, put next cell that S will enter according to the ownership shift(ing) ring continues prediction.
If regarding first order movement rule verification scheme as a kind of lateral prediction mistake, then second level movement rule verification scheme is considered as a kind of longitudinal mistake.This longitudinal mistake can not be by investigating movement rule availability " to find, therefore can not be corrected in time.Longitudinal mistake, in N number of predetermined period, Continuously there is mistake for the prediction of same cell.Possible type of error mainly has two classes：1) belong to mobile loop in part by random disturbances, cause space or time prediction mistake that there is randomness；2) loop is in local space or metastable change is there occurs on the time for ownership movement, i.e., actual incision cell continuous several times are same cell, and resident duration is unanimously, at this point it is possible to using second level movement rule verification scheme：
In the cycle for calculating predetermined number, when C (W) predicts MC (W+1) that the MRS will enter, the number of times of continuous prediction error, wherein, C (W) is default cell, MC 0V+1) it is next cell that the MRS of prediction will enter；
Here, the cycle of predetermined number can be set according to actual conditions, for example, can be 5 predetermined period.
Work as E>During Et, then stop at C (W) and predict the MC (W+1) that the MRS will enter, wherein, E is the number of times of the continuous prediction error, and Et is continuous prediction error threshold value；
Et can be set according to the practical experience of staff.
Work as E<During Et or E=Et, next cell that S will enter is put according to the ownership shift(ing) ring continues prediction.
The wrong consecutive identical number of times Es of a prediction can be re-introduced on foundation stone above goes out;
Work as E>During Et, in the cycle for calculating predetermined number, when putting MC (W+1) that S will enter described in C (W) predictions, the wrong consecutive identical number of times of prediction；
Work as Es>During Es t, then the cell update in the ownership shift(ing) ring on the W+1 position put to S is actual to switch into cell for described in；Another sunset is foretold, also need to the mark of the cell in ownership shift(ing) ring on the W+1 position being updated to the mark of the actual cells switched into of MRS, the resident duration of cells of the MRS in ownership shift(ing) ring on the W+1 position is updated to the resident duration of the actual cells switched into of MRS.
Due to the complexity of network, in fact it could happen that other random cases cause forecasting inaccuracy really, and this stochastic prediction mistake is difficult to find and correct by two kinds of mechanism above, therefore can be in the way of third level Wrong control does not correct ownership shift(ing) ring：The application to the result is directly abandoned after mistake is found, i.e. after S incision new cells are put, when MRS has found prediction cell and inconsistent actual incision cell, then resource reclaim is initiated to the cell of prediction by the cell of actual incision and asked, so that the cell of prediction starts resource at once Recovery, in order to avoid waste of resource.
It should be noted that, the execution sequence of step 311 is not strictly to fix, after the cell that MRS newly enters, you can carry out verifying the cell and predict the uniformity for the cell for having entrance that MRS newly enters, i.e. after step 307 execution, you can perform step 311.
The Forecasting Methodology that scheme provided in an embodiment of the present invention is provided, predict after next incision cell, MRS can be allowed to need the user terminal relayed to search for the Target cell of prediction in advance and synchronize, can also set up and be connected with the switching target of prediction in advance before handoff threshold triggering.
The embodiment of the present invention provides a kind of method for predicting Target cell, by the movement rule for obtaining mobile-relay station MRS, predict the Target cell that the MRS will enter, and when the cell that MRS is switched into and the inconsistent Target cell of prediction, it is corrected or reacquires the movement rule of the MRS.With in the prior art predict MRS it is mobile when, the correctness of prediction it is relatively low or can not it is correctly predicted go out the next cells that will enter of MRS compare, scheme provided in an embodiment of the present invention can improve the accuracy for next cell that prediction MRS will enter, and resource can be reserved for the Target cell of prediction, improve resource reservation accuracy rate and improve resource utilization.
The embodiment of the present invention provides a kind of device for predicting Target cell, and the device can be MRS (mobi le relay s tat ion, mobile-relay station）, or the good business device of moving projection month, as shown in Fig. 8, device includes：Mobile learning unit 801, moving projection execution unit 802, the first transmitting element 803, judging unit 804, set up unit 805, the second transmitting element 806, mobile authentication unit 807, first movement rule computing unit 808, first movement rule corrects unit 809, and the second movement rule computing unit 810, the second movement rule corrects unit 811,3rd movement rule computing unit 812, the 3rd movement rule corrects unit 813.
Mobile learning unit 801, the movement rule for obtaining mobile-relay station MRS；
The cell information of cell, the predetermined number that MRS switchings are passed through is currently located according to the MRS of acquisition movement rule, MRS, moving projection execution unit 802 predicts the Target cell that the MRS will enter；
First transmitting element 803, for sending resource reservation request to the Target cell, the resource reservation request includes using reserved resource quantity, the earliest use time using reserved resource needed for the MRS With the duration using reserved resource, resource is reserved for indicating that the Target cell distributes for the MRS；It should be noted that being that MRS reserves appropriate resource by prior notice Target cell, resource reservation accuracy rate can be improved, the utilization rate of resource is improved.
MRS is received after the resource reservation response of Target cell transmission, that is, represents that Target cell completes the reserved of resource for MRS, MRS can switch into Target cell.
After the MRS enters new cell, judging unit 804 judges whether the cell that the MRS newly enters is identical with the Target cell；
When the cell that the MRS newly enters is identical with the Target cell, unit 805 is set up, is set up and connected using the reserved resource；It should be noted that MRS is when switching over decision-making, prioritizing selection has reserved the cell of resource for it, if the cell is not faced in area's list what MRS can access, MRS selects new switching cell according to switching criterion, and initiates switching flow.
When the cell that the MRS newly enters is differed with the Target cell, second transmitting element 806, resource reservation cancellation request is sent to the Target cell for the cell that newly enters by the MRS, so that the Target cell reclaims the reserved resource or according to B=B immediately.- B.* [Tr (i)-T (i)]/Tr (i) gradually decreases the resource quantity of the reserved resource；
Wherein, B is the resource quantity of the reserved resource gradually decreased, B.For the resource quantity of the reserved resource, Tr (i) is the use duration of the reserved resource, and the earliest time that T (i) resources for needed for distance are used starts the time crossed
Mobile authentication unit 807, for when the cell that the MRS is switched into and the inconsistent Target cell of prediction, being corrected or reacquiring the movement rule of the MRS.
After MRS switches into a new cell, the checking of movement rule validity can be started, scheme provided in an embodiment of the present invention proposes a kind of three-level movement rule verification scheme to find mistake in time as much as possible and correct mistake.
It should be noted that the validity of moving projection is determined by two factors：One be Spatial Dimension the degree of accuracy, one be time dimension the degree of accuracy.Switched into a MRS in the prediction of cell, when only the prediction on the two latitudes is all correct, just think that this prediction is accurate.In scheme provided in an embodiment of the present invention, the prediction accuracy of Spatial Dimension is to switch into Target cell to the MRS of prediction Mark prediction accuracy, if the mark that prediction MRS switches into cell of the mark with actually switching into of Target cell is consistent, then it is assumed that this predicts that Spatial Dimension is accurate.Other scheme provided in an embodiment of the present invention, the prediction accuracy of time dimension is after being cut to MRS in the new cell entered, to be resident the prediction accuracy of duration.The three-level movement rule verification scheme provided according to embodiments of the present invention, verifies new cell and the cell of the MRS entrance of prediction that MRS is switched into, three-level movement rule verification scheme is detailed below successively：
Based in a predetermined period, the moving projection carried out according to ownership shift(ing) ring mistake in multiple cells can use first order movement rule verification scheme：First movement rule computing unit 808, for basis《 = N.K/NN, calculate movement rule availability；
Wherein,《For movement rule availability, movement rule availability shows in a predetermined period, according to the effective percentage of ownership shift(ing) ring Accurate Prediction, Ν.κFor in the ownership shift(ing) ring, MC 0V+1) mark it is identical with the mark of the MS cells actually entered, and the resident duration of the MC (W+1) resides in the number of the duration identical cell of the cell actually entered with the MS, MC 0V+1) it is next cell that the MS of prediction will enter, NNFor the number of the cell included in the ownership shift(ing) ring；When《< «tWhen, the first movement rule corrects unit 809, ownership shift(ing) ring is redefined, wherein being movement rule availability threshold value；
It should be noted that《, set according to the practical experience of staff, work as a< «tWhen, show that the prediction accuracy based on the ownership shift(ing) ring is very low, it is impossible to be used further to moving projection, restarting is belonged into shift(ing) ring identification process, new ownership shift(ing) ring is identified.When《> «tOr《 = «tWhen, continue to predict next cell that the MRS will enter according to the ownership shift(ing) ring.
If regarding first order movement rule verification scheme as a kind of lateral prediction mistake, then second level movement rule verification scheme is considered as a kind of longitudinal mistake.This longitudinal mistake can not be by investigating movement rule availability " to find, therefore can not be corrected in time.At this point it is possible to be verified and corrected using second level movement rule verification scheme：Second movement rule computing unit 810, in cycle for calculating predetermined number, the MC 0V+1 that S will enter are being put described in C (W) predictions) when, the number of times of continuous prediction error, wherein, C (W) is default cell, MC 0V+1) it is next cell that the MRS of prediction will enter；Second movement rule corrects unit 81 1, for working as E>During Et, then C predictions institute is stopped at State the MC OV+l that MRS will enter), wherein, E is the number of times of the continuous prediction error, and Et is continuous prediction error threshold value；
3rd movement rule computing unit 812, for working as E>During Et, in the cycle for calculating predetermined number, when putting MC (W+1) that S will enter described in C (W) predictions, the wrong consecutive identical number of times of prediction；3rd movement rule corrects unit 813, for working as Es>During Es t, then the cell update in the ownership shift(ing) ring on the W position put to S is actual to switch into cell for described in.
Due to the complexity of network, in fact it could happen that other random cases cause forecasting inaccuracy really, and this stochastic prediction mistake is difficult to find and correct by two kinds of mechanism above, therefore can be in the way of third level Wrong control does not correct ownership shift(ing) ring：The application to the result is directly abandoned after mistake is found, i.e. after S incision new cells are put, when MRS has found prediction cell and inconsistent actual incision cell, then resource reclaim is initiated to the cell of prediction by the cell of actual incision to ask, so that the cell of prediction starts the recovery of resource at once, in order to avoid waste of resource.
Further, as shown in figure 9, mobile learning unit 801 includes：First mobile learning subelement 901, computing module 902, the first determining module 903, second mobile learning subelement 904, obtains module 905, and inquiry obtains submodule 906, obtain submodule 907, judge module 908, the second determining module 909.
When putting S movement rule described in obtaining, the first mobile learning subelement 901, for according to all switching record informations sequentially preserved in S are put, determining candidate home cell, the candidate home cell is used to recognize ownership shift(ing) ring；
Home cell is docked in the cell that public transit vehicle master station accesses by MRS, that is MRS following vehicles are from home cell, home cell finally is docked in, is the MRS residence times most long cell, and ownership shift(ing) ring can be obtained according to the home cell；
Specifically, the computing module 902 in the first mobile learning subelement 901, is resident duration in each cell for the MRS according to all switching record informations sequentially preserved in the MS, calculates the average value of the resident duration；
MRS is lays on a vehicle or on movable carrier, the trunk desk for receiving and forwarding radio signal.MRS records handover information, and handover information includes the mark for each cell that MRS is switched With resident duration, and retain these historical informations.
Specifically, the average value of resident duration is calculated according to Tt=(Tr (l)+Tr (2)+" '+Tr (i)+Tr (N))/N, wherein, Tr (i) represents the resident duration in i-th of resident cell, i-th of resident cell can be represented with C (i), Tt represents the average value of resident duration, it should be noted that, N switches the effective sample number collected in historical information to be current, N values are [l, Nmax], if i.e. current sample number is more than Nmax, Nmax newest sample value is then taken to be calculated.
First determining module 903, for as Tr (i)>Tt and Tr (i)>During Trh, it is the candidate home cell to determine the corresponding cell C (i) of the Tr (i), wherein, Tr (i) is to be resident duration in C (i) cells, the C (i) is that the MRS switches i-th of the cell passed through, the i is to be more than and the natural number equal to 1, and Tt is the average value calculated, and the Trh is resident durations of the MRS in candidate home cell.
Continue the resident duration that MRS switches the cell passed through after C (i) being compared with Tt and Trh successively, if MRS is more than Tt in the resident duration of C (i+n) this cell, and during also greater than Trh, it is determined that C (i+n) is new candidate home cell.
According to the candidate home cell of determination, the second mobile learning subelement 904 for obtaining the ownership shift(ing) ring, and determines that the candidate home cell is home cell.
Ownership shift(ing) ring is a shift(ing) ring of all cells composition sequentially undergone in the moving process of MRS following vehicles, the ownership shift(ing) ring is not a simple ring in a mobile network, but the loop that MRS maps in a mobile network after being moved with car operation circuit ring；
Specifically, module 905 is obtained, for according to the candidate home cell, obtaining the first candidate ownership shift(ing) ring and the second candidate ownership shift(ing) ring；
The inquiry obtained in module 905 obtains submodule 906, for by all switching record informations sequentially preserved in the MRS, each cell that the MRS is switched into after the C (i) is inquired about successively, and acquisition is identical with the mark of the C (i) and in first community C (i+M) of the residence time more than Tt of the C (i)；
Obtain submodule 907, for the first community according to acquisition, the first candidate ownership shift(ing) ring is obtained, the first candidate ownership shift(ing) ring is { C (i), C (i+1), C (i+2) ,-C (i+M) }; The acquisition submodule 906 of inquiring about continues to inquire about each cell that the MRS is switched into after the C (i+M), and acquisition is identical with the mark of the C (i) and the C (i+M) mark and in the C (i+M) second community C (i+N) of the residence time more than Tt;According to the second community of acquisition, the acquisition submodule 907 obtains the second candidate ownership shift(ing) ring, second candidate ownership shift(ing) ring for C (i+M), C (i+M+1), C (i+M+2) ,-" C (i+M+N) }；
Then, judge module 908 judges whether the first candidate ownership shift(ing) ring and second candidate ownership shift(ing) ring are identical；
Further, judge whether L { MC1 } is equal with L { MC2 }, wherein L { MC1 } represents the cell number included in the first candidate ownership shift(ing) ring, and L { MC2 } represents the cell number included in the second candidate ownership shift(ing) ring；
When L { MC1 } is equal with L { MC2 }, identifying whether unanimously for the cell on MC1 and MC2 correspondence positions is compared successively；Compared since MC1 with MC2 the 1st cell, wherein, as long as the mark of any of MC1 and MC2 cells is different, then MC1 and MC2 is just differed；When all cells in MC1 and MC2 mark all when, then MC1 is identical with MC2.
When L { MC1 } and L { MC2 } are unequal, then need to obtain new candidate's ownership shift(ing) ring in the way of candidate's ownership shift(ing) ring is obtained again.
When first candidate ownership shift(ing) ring is identical with second candidate ownership shift(ing) ring, second determining module 909, for determining that the ownership shift(ing) ring is that first candidate belongs to shift(ing) ring or second candidate ownership shift(ing) ring, and determine that the candidate home cell is home cell.
Further, moving projection execution unit 802, the Target cell that predicting the MRS will enter can use following any mode：
Mode one：As shown in Figure 10, the moving projection execution unit 802 includes：First computing module 1001, setup module 1002, the first prediction module 1003, the second computing module 1004, the second prediction module 1005, the 3rd prediction module 1006.
In the ownership shift(ing) ring, the first computing module 1001, the number J, C (W) calculated with C (W) mark identical cell puts S for described in and is currently located cell；
The mark identical cell of cell is currently located with MRS in ownership shift(ing) ring, referred to as MRS is current The matching cell of place cell.Whether can be preserved with array L (i) in ownership shift(ing) ring is the information for putting the matching cell that S is currently located cell, i represents position of the cell on ownership shift(ing) ring, if it is 1 that matching cell, which is then set on L (i) relevant positions, it is 0 then to be set on L (i) relevant positions if not matching cell.So, the number J with C (W) mark identical cell can be drawn by being counted to 1 in L (i) arrays.
As J=0, setup module 1002, it is sky NULL to set MC (W+1), wherein, the Target cell that MC (W+1) will enter for the MRS that predicts；
As J=l, first prediction module 1003, prediction MC (W+1) is the Target cell that the MRS will enter, wherein, the MC 0V+1) for next cell of MC (W) in the ownership shift(ing) ring, the cell that the MC (W) represents for the mark identical with the C (W) in the ownership shift(ing) ring；
Work as J>When 1, the second computing module 1004 calculates the mark of previous cell of this J cell in the ownership shift(ing) ring, the number K with the C (W-1) mark identical cell respectively;
As K=l, second prediction module 1005, prediction MC (W+1) is the Target cell that the MRS will enter, wherein, the mark of the C (W-l) is identical with the mark of MC (W-l) in the ownership shift(ing) ring；Further, K is worked as>When 1, according to J>1 method continues to calculate, until predicting the Target cell that the MRS will enter；
3rd prediction module 1006, during for there is the mark of G cell identical with the C [W- (W-1)] mark in the ownership shift(ing) ring, the next cell for predicting any one cell in the G cell is the Target cell that the MRS will enter.
Method shown in Figure 10 is fundamental forecasting method, further, the Target cell that the embodiment of the present invention can also will be entered using a kind of simple method prediction MRS, that is, extends Forecasting Methodology：
The moving projection execution unit 804 specifically for, when the C (W) mark is identical with the MC (W) mark, the Target cell that predicting the MRS will enter is MC (W+1), wherein C (W) is that the MRS is currently located cell, the cell that MC (W) will enter for the MS of the last prediction, MC (W+1) is the next cell for belonging to MC (W) in shift(ing) ring.
When the last prediction of failure, then it can not be further continued for being predicted using extension Forecasting Methodology, the Target cell that MRS will enter can be predicted using fundamental forecasting method. The embodiment of the present invention provides a kind of device for predicting Target cell, pass through movement rule unit, according to all switching record informations sequentially preserved in MRS, candidate home cell and ownership shift(ing) ring, the Target cell that moving projection execution unit prediction MRS will enter are determined.With in the prior art predict MRS it is mobile when, the correctness of prediction it is relatively low or can not it is correctly predicted go out the next cells that will enter of MRS compare, scheme provided in an embodiment of the present invention can improve the accuracy for next cell that prediction MRS will enter, and resource can be reserved for the Target cell of prediction, improve resource reservation accuracy rate and improve resource utilization.
It is described above; only embodiment of the invention, but protection scope of the present invention is not limited thereto, any one skilled in the art the invention discloses technical scope in; change or replacement can be readily occurred in, should be all included within the scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.

Claims (19)

  1. Claims
    1st, a kind of method for predicting Target cell, it is characterised in that including：
    Obtain mobile-relay station MRS movement rule；
    The cell information of cell, the predetermined number that MRS switchings are passed through is currently located according to the MRS of acquisition movement rule, MRS, the Target cell that the MRS will enter is predicted；
    When the cell that the MRS is switched into and the inconsistent Target cell of prediction, and it is corrected or reacquires the movement rule of the MRS.
    2nd, the method for prediction Target cell according to claim 1, it is characterised in that the movement rule of the acquisition mobile-relay station MRS includes：
    According to all switching record informations sequentially preserved in MRS, determine candidate home cell, the candidate home cell is used to recognize ownership shift(ing) ring, and the cell and the MRS that the switching record information includes the MRS switchings process are resident duration in each cell；
    According to the candidate home cell, the ownership shift(ing) ring is obtained, and determine that the candidate home cell is home cell.
    3rd, the method for prediction Target cell according to claim 2, it is characterised in that described according to all switching record informations sequentially preserved in MRS, determines that candidate home cell includes：
    The MRS according to all switching record informations put and sequentially preserved in S is resident duration in each cell, calculates the average value of the resident duration；
    As Tr (i)>Tt and Tr (i)>During Trh, it is the candidate home cell to determine the corresponding cell C (i) of the Tr (i), wherein, Tr (i) is to be resident duration in C (i) cells, the C (i) is that the MRS switches i-th of the cell passed through, the i is to be more than and the natural number equal to 1, and Tt is the average value calculated, and the Trh is resident durations of the MRS in candidate home cell.
    4th, the method for the prediction Target cell according to Claims 2 or 3, it is characterised in that described according to the candidate home cell, obtains the ownership shift(ing) ring, and determine that the candidate home cell includes for home cell：
    According to the candidate home cell, the first candidate ownership shift(ing) ring and the second candidate ownership shift(ing) ring are obtained；Judge whether the first candidate ownership shift(ing) ring and second candidate ownership shift(ing) ring are identical； When first candidate ownership shift(ing) ring is identical with second candidate ownership shift(ing) ring, it is that first candidate belongs to shift(ing) ring or second candidate ownership shift(ing) ring then to determine the ownership shift(ing) ring, and determines that the candidate home cell is home cell.
    5th, the method for prediction Target cell according to claim 4, it is characterised in that described according to the candidate home cell, obtaining the first candidate ownership shift(ing) ring and the second candidate ownership shift(ing) ring includes：
    By all switching record informations put and sequentially preserved in S, each cell that the MRS is switched into after the C (i) is inquired about successively, and acquisition is identical with the mark of the C (i) and in first community C (i+M) of the residence time more than Tt of the C (i);
    According to the first community of acquisition, the first candidate ownership shift(ing) ring is obtained, the first candidate ownership shift(ing) ring is { C (i), C (i+1), C (i+2) ,-C (i+M) };
    According to the method for obtaining the first candidate ownership shift(ing) ring, continue to inquire about each cell that the MRS is switched into after the C (i+M), obtain the second candidate ownership shift(ing) ring, second candidate ownership shift(ing) ring for C (i+M), C (i+M+1), C (i+M+2), (（i+M+N) }.
    6th, the method for the prediction Target cell according to any one of claim 1-5, it is characterized in that, described to be currently located the match condition that cell, the MRS switch the cell information and the ownership shift(ing) ring of the predetermined number passed through according to MRS, the Target cell that predicting the MRS will enter includes：
    In the ownership shift(ing) ring, the number J, C (W) calculated with C (W) mark identical cell is that the MRS is currently located cell；
    As J=0, it is sky NULL to set MC (W+1), wherein, the Target cell that MC (W+1) will enter for the MRS that predicts；
    As J=l, prediction MC (W+1) is the Target cell that the MRS will enter, wherein, the MC (W+1) is next cell of MC (W) in the ownership shift(ing) ring, and the MC (W) is the cell represented with the C (W) mark identical in the ownership shift(ing) ring；
    Work as J>When 1, the mark of previous cell of this J cell in the ownership shift(ing) ring, the number K with the C (W-1) mark identical cell are calculated respectively;As K=l, prediction MC (W+1) is the Target cell that the MRS will enter, wherein, the mark of the C (W-l) is identical with the mark of MC (W-l) in the ownership shift(ing) ring；Work as K>When 1, according to J>1 method continues to calculate, will until predicting the MRS The Target cell of entrance；When the mark for having G cell in the ownership shift(ing) ring is identical with the C [W- (W-1)] mark, the next cell for predicting any one cell in the G cell is the Target cell that the MRS will enter.
    7th, the method for prediction Target cell according to claim 6, it is characterized in that, described to be currently located the match condition that cell, the MRS switch the cell information and the ownership shift(ing) ring of the predetermined number passed through according to MRS, the Target cell that predicting the MRS will enter includes：
    When the C (W) mark is identical with the MC (W) mark, the Target cell that S will be put described in prediction to be entered is MC 0V+1), wherein C (W) puts S for described in and is currently located cell, MC (W) puts the cell that S will enter, next cell that MC (W+1) is MC (W) in the ownership shift(ing) ring for the described of the last prediction.
    8th, the method for the prediction Target cell according to any one of claim 1-7, it is characterised in that after the Target cell that the prediction MRS will enter, in addition to：
    Resource reservation request is sent to the Target cell, the resource reservation request includes using the duration reserved resource quantity, the earliest use time using reserved resource and use reserved resource needed for the MRS, and resource is reserved for indicating that the Target cell distributes for the MRS；
    After the MRS switches into new cell, judge whether the cell that the MRS newly enters is identical with the Target cell；
    When the cell that the MRS newly enters is identical with the Target cell, then connection is set up using the reserved resource；
    When the cell that the MRS newly enters is differed with the Target cell, the cell newly entered by the MRS sends resource reservation cancellation request to the Target cell, so that the Target cell reclaims the reserved resource or according to B=B immediatelyQ - BQ* [Tr (i)-T (i)]/Tr (i) gradually decreases the resource quantity of the reserved resource；
    Wherein, B is the resource quantity of the reserved resource gradually decreased, B.For the resource quantity of the reserved resource, Tr (i) is the use duration of the reserved resource, and the earliest time that T (i) resources for needed for distance are used starts the time crossed.
    9th, the method for prediction Target cell according to claim 1, it is characterised in that described to work as MRS When the cell that switches into and the inconsistent Target cell of prediction, and it is corrected or reacquires the movement rule of the MRS and include：
    According to《= N.K/NN, calculate movement rule availability；Wherein,《For movement rule availability, Ν.κFor in the ownership shift(ing) ring, MC 0V+1) mark it is identical with the mark of the MRS cells actually entered, and the resident duration of the MC (W+1) puts the number that S resides in the duration identical cell of the cell actually entered with described, MC 0V+1) it is next cell that the MRS of prediction will enter, NNFor the number of the cell included in the ownership shift(ing) ring；
    Work as a< «tWhen, ownership shift(ing) ring is redefined, wherein《tFor movement rule availability threshold value.
    10th, the method for prediction Target cell according to claim 9, it is characterized in that, when the cell switched into when MRS is actual and the inconsistent Target cell of prediction, and it is corrected or reacquires the movement rule of the MRS and include：
    In the cycle for calculating predetermined number, when C (W) predicts MC (W+1) that the MRS will enter, the number of times of continuous prediction error, wherein, C (W) is default cell, MC 0V+1) put next cell that S will enter for the described of prediction；
    Work as E>During Et, then stop at C (W) and predict the MC (W+1) that the MRS will enter, wherein, E is the number of times of the continuous prediction error, and Et is continuous prediction error threshold value；
    Work as E>During Et, in the cycle for calculating predetermined number, the MC 0V+1 that the MRS will enter are predicted in C (W)) when, the wrong consecutive identical number of times of prediction；
    Work as Es>During Es t, then the cell update in the ownership shift(ing) ring on the W position is put that S is actual to switch into cell to be described, Es is the wrong consecutive identical number of times of prediction, and Es t are wrong consecutive identical number of times threshold value.
    11st, a kind of device for predicting Target cell, it is characterised in that including：
    Mobile learning unit, the movement rule for obtaining mobile-relay station MRS；
    Moving projection execution unit, movement rule, MRS for the MRS according to acquisition are currently located cell, the cell information for the predetermined number that MRS switchings are passed through, and predict the Target cell that the MRS will enter；
    Mobile authentication unit, for the Target cell when the MRS cells switched into and prediction not When consistent, and it is corrected or reacquires the movement rule for putting S.
    12nd, the device of prediction Target cell according to claim 11, it is characterised in that the mobile learning unit includes：
    First mobile learning subelement, for according to all switching record informations sequentially preserved in MRS, determining candidate home cell, the candidate home cell is used to recognize ownership shift(ing) ring；
    Second mobile learning subelement, for according to the candidate home cell, obtaining the ownership shift(ing) ring, and determines that the candidate home cell is home cell.
    13rd, the device of prediction Target cell according to claim 12, it is characterised in that the first mobile learning subelement includes：
    Computing module, is resident duration in each cell for the MRS according to all switching record informations sequentially preserved in the MRS, calculates the average value of the resident duration；
    First determining module, for as Tr (i)>Tt and Tr (i)>During Trh, it is the candidate home cell to determine the corresponding cell C (i) of the Tr (i), wherein, Tr (i) is to be resident duration in C (i) cells, the C (i) is that the MRS switches i-th of the cell passed through, the i is to be more than and the natural number equal to 1, and Tt is the average value calculated, and the Trh is resident durations of the MRS in candidate home cell.
    14th, the device of the prediction Target cell according to claim 12 or 13, it is characterised in that the second mobile learning subelement includes：
    Module is obtained, for according to the candidate home cell, obtaining the first candidate ownership shift(ing) ring and the second candidate ownership shift(ing) ring；
    Judge module, for judging whether the first candidate ownership shift(ing) ring and second candidate ownership shift(ing) ring are identical；
    Second determining module, for when first candidate ownership shift(ing) ring is identical with second candidate ownership shift(ing) ring, it is that first candidate belongs to shift(ing) ring or second candidate ownership shift(ing) ring then to determine the ownership shift(ing) ring, and determines that the candidate home cell is home cell.
    15th, the device of prediction Target cell according to claim 14, it is characterised in that the acquisition module includes：
    Inquiry obtains submodule, for putting all switching record informations sequentially preserved in S by described, successively Each cell that the MRS is switched into after the C (i) is inquired about, acquisition is identical with the mark of the C (i) and in first community C (i+M) of the residence time more than Tt of the C (i);
    Obtain submodule, for the first community according to acquisition, the first candidate ownership shift(ing) ring is obtained, the first candidate ownership shift(ing) ring is { C (i), C (i+1), C (i+2) ,-C (i+M) };
    The inquiry obtains submodule and is additionally operable to, by all switching record informations sequentially preserved in the MRS, each cell that the MRS is switched into after the C (i+M) is inquired about, acquisition is identical with the mark of the C (i) and the C (i+M) mark and in the C (i+M) second community C (i+N) of the residence time more than Tt；
    The acquisition submodule is additionally operable to, according to the second community of acquisition, obtain the second candidate ownership shift(ing) ring, second candidate ownership shift(ing) ring for C (i+M), C (i+M+1), C (i+M+2) ,-" C (i+M+N) }.
    16th, the device of the prediction Target cell according to any one of claim 11-15, it is characterised in that the moving projection execution unit includes：
    First computing module, in the ownership shift(ing) ring, the number J, C (W) calculated with C (W) mark identical cell to put S for described in and be currently located cell；
    Setup module, for as J=0, it to be sky NULL to set MC (W+1), wherein, the Target cell that MC (W+1) will enter for the MRS that predicts；
    First prediction module, for as J=l, prediction MC0V+1) it is the Target cell that the MRS will enter, wherein, the MC W+1) for next cell of MC (W) in the ownership shift(ing) ring, the cell that the MC (W) represents for the mark identical with the C (W) in the ownership shift(ing) ring；
    Second computing module, for working as J>When 1, the mark of previous cell of this J cell in the ownership shift(ing) ring, the number K with the C (W-1) mark identical cell are calculated respectively;
    Second prediction module, for as K=l, predicting MC0V+1) Target cell that will enter for the MRS, wherein, the mark of the C (W-l) is identical with the mark for belonging to MC (W-l) in shift(ing) ring；
    3rd prediction module, for when the mark for having G cell in the ownership shift(ing) ring is identical with the C [W- (W-1)] mark, the next cell for predicting any one cell in the G cell to be the Target cell that the MRS will enter.
    17th, the device of prediction Target cell according to claim 16, it is characterised in that the movement Prediction execution unit specifically for, when the C (W) mark is identical with the MC (W) mark, the Target cell that predicting the MRS will enter is MC (W+1), wherein C (W) is that the MRS is currently located cell, the cell that MC (W) will enter for the MRS of the last prediction, MC 0V+1) it is the next cell for belonging to MC (W) in shift(ing) ring.
    18th, the device of the prediction Target cell according to any one of claim 11-17, it is characterised in that also include：
    First transmitting element, for sending resource reservation request to the Target cell, the resource reservation request includes using the duration reserved resource quantity, the earliest use time using reserved resource and use reserved resource needed for the MRS, and resource is reserved for indicating that the Target cell distributes for the MRS；
    Judging unit, for after the MRS enters new cell, judging whether the cell that the MRS newly enters is identical with the Target cell；
    Unit is set up, for when the cell that the MRS newly enters is identical with the Target cell, then setting up connection using the reserved resource；
    Second transmitting element, for when the cell that the MRS newly enters is differed with the Target cell, the cell newly entered by the MRS sends resource reservation cancellation request to the Target cell, so that the Target cell reclaims the reserved resource or according to B=B immediatelyQ -BQ* [Tr (i)-T (i)]/Tr (i) gradually decreases the resource quantity of the reserved resource；
    Wherein, B is the resource quantity of the reserved resource gradually decreased, B.For the resource quantity of the reserved resource, Tr (i) is the use duration of the reserved resource, and the earliest time that T (i) resources for needed for distance are used starts the time crossed.
    19th, the device of prediction Target cell according to claim 11, it is characterised in that the mobile authentication unit includes：
    First movement rule computation subunit, for root=N.K/NN, movement rule availability is calculated, wherein,《For movement rule availability, Ν.κFor in the ownership shift(ing) ring, MC (W+1) mark is identical with the mark for putting the cell that S is actually entered, and the resident duration of the MC (W+1) resides in the number of the duration identical cell of the cell actually entered with the MRS, next cell that MC (W+1) will enter for the MRS of prediction, NNFor the number of the cell included in the ownership shift(ing) ring； First movement rule corrects subelement, at that time, redefining ownership shift(ing) ring, wherein《, it is movement rule availability threshold value.
    20th, the device of prediction Target cell according to claim 19, it is characterised in that the mobile authentication unit includes：
    Second movement rule computation subunit, in cycle for calculating predetermined number, when C (W) predicts MC (W+1) that the MS will enter, the number of times of continuous prediction error, wherein, C (W) is default cell, next cell that MC (W+1) will enter for the MRS of prediction；
    Second movement rule corrects subelement, for working as E>During Et, then stop at C (W) and predict the MC (W+1) that the MRS will enter, wherein, E is the number of times of the continuous prediction error, and Et is continuous prediction error threshold value
    3rd movement rule computation subunit, for working as E>During Et, in the cycle for calculating predetermined number, when C (W) predicts MC (W+1) that the MRS will enter, the wrong consecutive identical number of times of prediction；
    3rd movement rule corrects subelement, for working as Es>During Es t, then the cell update in the ownership shift(ing) ring on the W position is switched into cell for the MRS is actual, Es is the wrong consecutive identical number of times of prediction, and Es t are wrong consecutive identical number of times threshold value.
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