CN100466810C - Small zone transfering method - Google Patents

Abstract

The method obtains parameter measurement values in current service cell and adjacent cell of mobile station. The method includes steps: (1) setting up threshold value of integral transfer and cycle for adjacent cell of mobile station; (2) based on obtained parameter measurement values to calculate and obtain accumulated value of parameters in cycle set up in (1); (3) determining whether accumulated value of parameters in (2) is larger than threshold value of transfer setup in step (1); if yes, the mobile station is transferred to adjacent cell; if no, then returning back to step (2). The method solves issue that it is unable to transfer to adjacent cell when signal in adjacent cell is better than signal in this cell for long time.

Description

The method that shift a kind of sub-district

Technical field

The present invention relates to the cellular technology in the communication system, the method that shift particularly a kind of sub-district.

Background technology

In the communication network, in order to reduce reasons such as cutting off rate, reduction network interferences, increase network capacity, the Serving cell of travelling carriage (MS, Mobile Station) can be transferred to its adjacent sub-district from current area sometimes, and wherein, current area is also named this sub-district.MS may be on different mode of operations when shifting to carry out the sub-district, such as the standby mode that is in the free time, or are in proprietary mode in conversation and/or the transmission data etc.No matter MS is in which type of mode of operation, the process that shift the sub-district all comprises processes such as some measurements and judgement usually.Transfer described in the application comprises gravity treatment and switching.

For gsm system, the transfer under proprietary mode comprises usually: processes such as DATA REASONING, data processing, transfer judgement, triggering and execution transfer.Wherein, the DATA REASONING process is meant: MS is by measuring the measured value of parameters that obtains current area and each adjacent cell downlink direction radio signal, such as periodically measuring and obtain measured value of parameters such as power level, signal quality; Data processing is meant: network side carried out processing such as computing after MS gave network side with the data report that measures to data; Shifting judgement is meant: according to The results of data processing, whether the network side judgement satisfies the default in advance jump condition of system; Trigger and carry out to shift and be meant: satisfying under the situation of jump condition, triggering and shift, network side is transferred to adjacent sub-district with MS.Wherein, down direction is meant that radio signal is transferred to the direction of MS from network side.

Report network side after the signal parameter except above-mentioned MS measurement down direction in the transfer process, judge whether to satisfy outside the mode of jump condition after network side is handled data, multiple processing mode can also be arranged, such as: MS is by measuring the measured value of parameters that obtains the down direction radio signal, MS oneself shifts through judging whether voluntarily after the data processing, as the gravity treatment in gsm system; Or network side judges whether to satisfy jump condition etc. by measuring the measured value of parameters that obtains the up direction radio signal through after the data processing.Wherein, up direction is meant that radio signal is transferred to the direction of network side from MS.

In the prior art, the method for multiple transfer is arranged, such as methods such as power budget (PBGT, Power Budget) transfer, mass transfers.

Shift to example with power budget (PBGT, Power Budget) below, transfer process is further detailed.Whether the real-time searching of PBGT transfer method exists the sub-district that path loss is littler and satisfy other set requirements of system, and determine whether and to shift, wherein, other set requirements of system comprise: power headroom threshold value PBGT_Ho_Margin, read-around ratio p and surpass number of times r etc.

The process schematic diagram that Fig. 1 shifts for PBGT, as shown in Figure 1, the detailed process that PBGT shifts is as follows:

Step 101: the transfer gate limit value of certain adjacent sub-district m is set, and the transfer gate limit value comprises: power headroom threshold value PBGT_Ho_Margin (m), number of times threshold value, wherein, the number of times threshold value is read-around ratio p and surpasses number of times r.

Step 102: power budget PBGT (m) value that obtains adjacent sub-district m.

Obtain PBGT (m) value in the step 102 and comprise DATA REASONING and two stages of data processing, wherein, in the DATA REASONING stage, the common every hundreds of millisecond of MS such as every 0.5s just to current service cell this sub-district just, and each adjacent cell downlink received power level carries out one-shot measurement, and measurement report reported network side, comprise measured value of parameters such as MS current service cell power level and adjacent cell power level in the measurement report, the every hundreds of millisecond of network side receives the one-shot measurement report such as every 0.5s; In the data processing stage, network side such as the parameters such as transmitting power that base station power control descends down, obtains PBGT (m) value according to each measurement report and other parameters that obtains, and specifically, PBGT (m) value can obtain with following expression formula (1):

PBGT(m)＝RXLEV_NCELL(m)-(RXLEV_CELL+PWR_C_D)-[(Min(MS_TXPWR_MAX(m)，P)-(Min(MS_TXPWR_MAX，P)] (1)

In the expression formula (1), the implication of each parameter is as follows:

PBGT (m) is: the power budget value of adjacent sub-district m is exactly the difference of current service cell path loss and adjacent sub-district m path loss;

RXLEV_NCELL (m) is: the descending received power level of adjacent sub-district m;

RXLEV_CELL is: current service cell is the descending received power level of this sub-district;

PWR_C_D is: the transmission power level that power control descends down, i.e. and the maximum downstream power of current service cell and power control is the difference of actual downstream power down;

Power control is present near the base station usually, because near the signal the base station is very good, so system carries out power control sometimes, promptly reduces actual emission power, and at this moment, the descending received power level of MS also will reduce; Some place does not have power control usually, does not have the PWR_C_D=0 of power control area;

MS_TXPWR_MAX (m) is: the MS maximum transmit power value that adjacent sub-district m allows;

P is: MS maximum transmission power ability value;

MS_TXPWR_MAX is: the MS maximum transmit power value that current service cell allows;

Under most of situation, the value of MS_TXPWR_MAX (m), MS_TXPWR_MAX, P is the same, has only the maximum transmission power ability value of some MS that specific demand is arranged can be greater than or less than the MS maximum transmit power value that the sub-district allows.

If comprise the measured value of parameters of a plurality of adjacent sub-districts in the measurement report that receives, then calculate the PBGT value of each adjacent sub-district, PBGT (m) is the PBGT value of one of them adjacent sub-district m.

When there not being power control, and the maximum transmit power value of MS maximum transmission power ability value and each sub-district permission is when identical, and expression formula (1) will be reduced to following expression (2):

PBGT(m)＝RXLEV_NCELL(m)-RXLEV_CELL (2)

Step 103: whether judge PBGT (m) value greater than PBGT_Ho_Margin (m), if greater than, execution in step 104 if be not more than, is returned step 102.

Step 103 is exactly whether judgment expression (3) is set up:

PBGT(m)>PBGT_Ho_Margin(m) (3)

Expression formula (3) is set up and meaned: the difference of current service cell path loss and adjacent sub-district m path loss is the power budget value, has surpassed the power headroom threshold value of adjacent sub-district.The difference of current service cell path loss and adjacent sub-district m path loss surpasses the power headroom threshold value of adjacent sub-district, be to trigger the primary condition that shifts, consider and to avoid MS to have fluctuation just problem such as to shift slightly, network operator PBGT_Ho_Margin usually is set to value greater than 0, such as 4dB or 6dB etc.

Step 104: judge whether PBGT (m) value satisfies the number of times threshold value greater than the situation of PBGT_Ho_Margin (m), if satisfy, execution in step 105 is not if satisfy execution in step 102.Here the number of times threshold value is read-around ratio p and surpasses number of times r.

The number of times threshold value is set is because shift also can the consumption network cost, if system is in the frequent scheduling, easy call drop, mobile phone also is out of order easily, therefore, a PBGT (m) generally can not appear〉situation of PBGT_Ho_Margin (m), and just trigger and shift, shift but satisfy just to trigger after certain number of times.In the number of times threshold value, if, read-around ratio p=5, surpass number of times r=4, have 4 times data to satisfy PBGT (m) in continuous 5 measurement reports that then have only network side to receive〉PBGT_Ho_Margin (m), just can trigger transfer, suppose that the PBGT_Ho_Margin of certain adjacent sub-district is set to 6dB, then we can say: the path loss of current service cell has all big 6dB of path loss of neighbour sub-district m 4 times in continuous 5 times, then trigger and shift.

Step 105: trigger and shift, network side is transferred to adjacent sub-district m with MS.

From expression formula (3) as can be seen, in the method shown in Figure 1, the PBGT_Ho_Margin value is more little, cause following result more: the power budget value surpasses the power headroom threshold value easily, therefore shift easily, shift highly sensitively, the transfer number in the system is many, cause table tennis to shift easily, appearance should not be shifted situation about but shifting easily; PBGT_Ho_Margin is big more, causes following result more: the power budget value is not easy to surpass the power headroom threshold value, therefore is not easy to shift, and it is low to shift sensitivity, and the transfer number in the system is few, occurs the situation that this transfer is not but shifted easily.Therefore, PBGT_Ho_Margin is the bigger the better, neither be the smaller the better.In like manner, it is more little to surpass number of times r, easy more the transfer; It is big more to surpass number of times r, is not easy more to shift, and therefore surpasses number of times r and is not the bigger the better equally, neither be the smaller the better.

The shortcoming of prior art is:

1) PBGT_Ho_Margin (m0) that supposes certain adjacent sub-district m0 is set to X0, in the overlapping area of current service cell and adjacent sub-district m0, there is a lot of location points, the power budget value of MS on these aspects is less than the power headroom threshold value, be PBGT (m0)＜PBGT_Ho_Margin (m0), but very near PBGT_Ho_Margin (m0), in other words, have a kind of state on these aspects: the path loss b of the neighbour sub-district m0 of the path loss a of current service cell is big, but a-b specific power surplus threshold value is little very approaching, according to prior art, even MS keeps this state also can not trigger transfer for a long time.

Fig. 2 be PBGT (m0) for a long time less than and schematic diagram during near PBGT_Ho_Margin (m0).Among Fig. 2, abscissa express time t, unit is s, ordinate is represented PBGT, and the unit of PBGT is dB, and it is 4dB that with dashed lines 201 is expressed PBGT_Ho_Margin (m0), expressing PBGT (m0) with point is 3.5dB, as can be seen from Figure 2, the PBGT value less than and near the state continuance of PBGT_Ho_Margin more than the 10s, shift but never trigger.

This situation can cause that the conversation interference is big, and then the problem of speech quality difference, also can cause call drop.Though can be by reducing PBGT_Ho_Margin (m0), make and under this class situation, also can trigger transfer, if but reduce PBGT_Ho_Margin (m0), might increase some unnecessary transfers again, and the promptly frequent possibility that shifts of the transfer that takes place to rattle has strengthened also.

2) if certain a moment, PBGT (m0) has surpassed PBGT_Ho_Margin (m0), and surpasses a lot, could shift but also will satisfy set number of times.

Fig. 3 surpasses the schematic diagram of PBGT_Ho_Margin (m0) when a lot of for beginning PBGT (m0) certain a moment.Among Fig. 3, abscissa express time t, unit is s, ordinate is represented PBGT, the unit of PBGT is dB, and it is 4dB that with dashed lines 301 is expressed PBGT_Ho_Margin (m0), expresses PBGT (m0) with point, before certain a moment, before the 2s on the time coordinate axle, PBGT (m0) is 3dB, and begin certain a moment, begin such as the 2s on the time coordinate axle, PBGT (m0) is 11dB.At this moment, if set read-around ratio p=5, and surpass number of times r=4, then after arriving 11dB, PBGT (m0) to wait 4 measurement reports just may trigger transfer at least.

3) the transfer gate limit value is too big or too little all not all right, therefore often needs to adjust, and has increased the workload of network operation.

Summary of the invention

In view of this, main purpose of the present invention is to provide the method for a kind of sub-district transfer, solves adjacent cell signal and is better than the untransferable problem of this cell signal for a long time.

Technical scheme of the present invention is achieved in that

The method that shift a kind of sub-district, the measured value of parameters of acquisition travelling carriage current service cell and adjacent sub-district, the method includes the steps of:

A, the points transfer threshold value and the cycle of the adjacent sub-district of described travelling carriage are set;

B, calculate the parameter accumulated value in the set cycle among the step a according to the measured value of parameters that obtains, described parameter accumulated value is the accumulated value of adjacent cell signal quality and current service cell signal quality difference; Or the difference of adjacent cell signal quality accumulated value and current service cell signal quality accumulated value;

Whether parameter accumulated value described in c, the determining step b greater than the transfer gate limit value that is provided with among the step a, if greater than, travelling carriage is transferred to adjacent sub-district, if be not more than, return step b.

Measured value of parameters comprises travelling carriage current service cell signal quality and adjacent cell signal quality, and the parameter accumulated value that obtains among the step b is the accumulated value of adjacent cell signal quality and current service cell signal quality difference.

Measured value of parameters comprises travelling carriage current service cell signal quality and adjacent cell signal quality, and the parameter accumulated value that obtains among the step b is the difference of adjacent cell signal quality accumulated value and current service cell signal quality accumulated value.

Cycle described in the step a is time cycle or inferior one number time.

Described measured value of parameters is the measured value of parameters of up direction received signal; Or be the measured value of parameters of down direction received signal.

Obtaining the parameter accumulated value described in the step b is to carry out at network side.

Obtaining the parameter accumulated value described in the step b is to carry out at travelling carriage.

The present invention preestablishes the integration handoff threshold value Sum_Ho_Margin (m) of certain adjacent sub-district.In the fixed in advance cycle, the signal parameter value addition is obtained accumulated value Sum (m), if Sum (m)〉Sum_Ho_Margin (m), then trigger and shift.

The present invention has following beneficial effect:

1) by the points transfer threshold value is set, be better than for a long time at adjacent cell signal under the situation of this cell signal, even its amplitude does not reach the transfer gate limit value, the back surpasses the points transfer threshold value if signal parameter adds up, and also can trigger transfer.So, can reduce conversation and disturb, improve speech quality, reduce cutting off rate, improve user's use experience.

2) by the points transfer threshold value is set, when adjacent cell signal is better than this cell signal very obviously the time in the short time, even its time does not reach time window or read-around ratio, the back surpasses the points transfer threshold value if signal parameter adds up, and also can trigger transfer.So, can in time trigger transfer, reduce conversation and disturb, improve speech quality, improve user's use experience.

3) the present invention goes in all communication systems that need the sub-district transfer, and applicability is stronger.

4) the present invention can solve that adjacent cell signal is better than this cell signal for a long time and this transfer and adjacent cell signal short time are better than this cell signal very obviously and two kinds of extreme cases of this transfer, therefore the points transfer threshold value comparatively speaking can be more fixing, can reduce the workload of network operation thus, make network operation become simpler.

Description of drawings

Fig. 1 is the process schematic diagram that PBGT shifts in the prior art;

Fig. 2 be PBGT in the prior art (m0) for a long time less than and schematic diagram during near PBGT_Ho_Margin (m0);

Fig. 3 surpasses the schematic diagram of PBGT_Ho_Margin (m0) when a lot of for beginning PBGT (m0) certain a moment in the prior art;

Fig. 4 is a power level points transfer procedure schematic diagram in the embodiment of the invention 1;

Fig. 5 is a points transfer principle schematic in the embodiment of the invention 1;

Fig. 6 is an embodiment of the invention 2PBGT points transfer procedure schematic diagram;

Fig. 7 is the embodiment of the invention 3 quality points transfer procedure schematic diagrames.

Embodiment

Method of the present invention preestablishes the points transfer threshold value Sum_Ho_Margin (m) of adjacent sub-district m, in predefined period of time T or read-around ratio p, will be by measuring the measured value of parameters that obtains, obtain parameter accumulated value Sum (m) after adding up, in case satisfy Sum (m)〉Sum_Ho_Margin (m), just trigger and shift.This transfer method among the present invention also can be referred to as the points transfer method.

Following with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.

Embodiment 1: the difference of the power level back of adding up is compared with the points transfer threshold value.

Embodiment 1 is applicable to the situation that the maximum transmission power ability value of inactivity control and MS equates with the MS maximum transmit power value of this sub-district and the permission of adjacent sub-district.

Fig. 4 is a power level points transfer procedure schematic diagram, and process shown in Figure 4 comprises following steps:

Step 401: the points transfer threshold value SUM_Ho_Margin (m) of certain adjacent sub-district m is set, and the cycle is set, wherein, the cycle can be that period of time T also can be the number of times period p, such as T=3s or p=5.

Step 402: obtain the power level RXLEV_NCELL (m) of this cell power level RXLEV_CELL and adjacent sub-district m, and obtain the difference of power level, be i.e. the difference of RXLEV_NCELL (m) and RXLEV_CELL.

The process that obtains RXLEV_CELL and RXLEV_NCELL (m) can be identical with the process that the DATA REASONING stage in the step 102 shown in Figure 1 carries out, receive the one-shot measurement report such as the every 0.5s of network side, comprise the value of RXLEV_CELL and RXLEV_NCELL (m) in the measurement report.

Step 403: the value SUM (m) that the difference of RXLEV_NCELL (m) and RXLEV_CELL adds up in the cycle that obtains to be provided with in the step 401, SUM (m) are specifically as expression formula (4):

$\mathrm{SUM}\left(m\right)=\underset{n=1}{\overset{N}{\mathrm{\Σ}}}[\mathrm{RXLEV}\_\mathrm{NCELL}(m,n)-\mathrm{RXLEV}\_\mathrm{CELL}\left(n\right)]---\left(4\right)$

In the expression formula (4), the implication of each parameter is as follows:

N is: this sub-district that network side obtains respectively in the cycle that sets in advance and the number of times of adjacent cell power level measurement value;

(m n) is RXLEV_NCELL: the n time descending received power level of adjacent sub-district m, 1＜n＜N;

RXLEV_CELL (n) is: the n time descending received power level of this sub-district, 1＜n＜N.

When obtaining SUM (m),, in step 403, obtain the value that the difference of RXLEV_NCELL (m) and RXLEV_CELL adds up except the above-mentioned difference that in step 402, obtains RXLEV_NCELL (m) and RXLEV_CELL by step 402, step 403; It also can be the value that in step 402, only obtains RXLEV_CELL and RXLEV_NCELL (m), obtain the value SUM_RXLEV_CELL of addition and the value SUM_RXLEV_NCELL (m) of addition, the difference SUM (m) that adds up=SUM_RXLEV_NCELL (the m)-SUM_RXLEV_CELL of the power level of reentrying earlier in step 403.

Such as, the every 0.5s of network side receives the one-shot measurement report, if the set cycle is a period of time T in the step 401, and T=3s, then with in the continuous 3s totally 6 times RXLEV_CELL value addition obtain SUM_RXLEV_CELL, with in the continuous 3s addition of totally 6 times RXLEV_NCELL (m) value obtain SUM_RXLEV_NCELL (m), obtain the value of SUM (m) SUM_RXLEV_NCELL (m) in the continuous 3s-SUM_RXLEV_CELL afterwards; If the set cycle is the number of times period p in the step 401, and p=5, then continuous 5 times RXLEV_CELL value addition is obtained SUM_RXLEV_CELL, the addition of continuous 5 times RXLEV_NCELL (m) value is obtained SUM_RXLEV_NCELL (m), obtain the value of SUM (m) in continuous 5 times=SUM_RXLEV_NCELL (m)-SUM_RXLEV_CELL afterwards.

Step 404: whether judge SUM (m) value greater than SUM_Ho_Margin (m), if greater than, execution in step 405 if be not more than, is returned step 402.

Step 405: trigger and shift, network side is transferred to adjacent sub-district m with MS.

Fig. 5 is the principle schematic of points transfer.Among Fig. 5, abscissa express time t, ordinate is represented power level RXLEV, the unit of RXLEV is dBm, curve 501 among Fig. 5 and curve 502 are represented the power level RXLEV (m1) of sub-district m1 and the power level RXLEV (m2) of sub-district m2 respectively, straight line 503 and straight line 504 be express time t1 and time t2 respectively, and t2-t1=T, T are the time cycle that system sets in advance.Among Fig. 5, curve 501, curve 502, straight line 503 is formed the A part, curve 501, curve 502, straight line 504 is formed the B part, curve 501, curve 502, straight line 503, straight line 504, axis of abscissas is formed the C part, can be by the cartographic represenation of area RXLEV (m1) partly of A+C among Fig. 5 at the value SUM_RXLEV of the addition of period of time T (m1), by the cartographic represenation of area RXLEV (m2) of B+C part at the value SUM_RXLEV of the addition of period of time T (m2), the area that this moment, SUM (m2)=SUM_RXLEV (m2)-SUM_RXLEV (m1) can deduct the A+C part with the area of B+C part is represented, just deducts A part area with B part area and represents.If B part area deducts A part area greater than default in advance transfer gate limit value, then trigger and shift.If on time t2, triggered transfer, then before branchpoint is time t2, sub-district m1 is this sub-district, sub-district m2 is adjacent sub-district, after branchpoint, sub-district m1 is adjacent sub-district, and sub-district m2 is this sub-district, the power level of this sub-district is expressed with solid line among Fig. 5, and the power level of adjacent sub-district dots out.

Embodiment 2: the PBGT value is added up to add afterwards to be compared with the points transfer threshold value.

Fig. 6 is a PBGT points transfer procedure schematic diagram, and process shown in Figure 6 comprises following steps:

Step 601: the points transfer threshold value SUM_Ho_Margin (m) of certain adjacent sub-district m is set, and the cycle is set, wherein, the cycle can be that period of time T also can be the number of times period p, such as T=3s or p=5.

Step 602: obtain PBGT (m) value.

The process that obtains the PBGT value can be identical with step 102 shown in Figure 1, obtains power level such as MS through measuring, and the every 0.5s of network side obtains a PBGT value.

Step 603: in the cycle that obtains to be provided with in the step 601, such as in the period of time T or power budget value of closing of PBGT (m) value addition in the number of times period p $\mathrm{SUM}\left(m\right)=\underset{n=1}{\overset{N}{\mathrm{\Σ}}}\left[\mathrm{PBGT}\left(m\right)\right],$ SUM (m) is specifically as expression formula (5):

$\mathrm{SUM}\left(m\right)=\underset{n=1}{\overset{N}{\mathrm{\Σ}}}\{\mathrm{RXLEV}\_\mathrm{NCELL}(m,n)-(\mathrm{RXLEV}\_\mathrm{CELL}+\mathrm{PWR}\_C\_D\left(n\right))-$

$\left[(\mathrm{Min}(\mathrm{MS}\_\mathrm{TXPWR}\_\mathrm{MAX}\left(m\right),P)-(\mathrm{Min}(\mathrm{MS}\_\mathrm{TXPWR}\_\mathrm{MAX},P)]\right\}---\left(5\right)$

In the expression formula (5), parameter N, RXLEV_NCELL (m, n), identical among RXLEV_CELL (n) and the embodiment 1, parameter PWR_C_D (n) is: identical in the transmission power level that the n time power control descends down, parameter MS_TXPWR_MAX (m), P, MS_TXPWR_MAX and prior art.

Step 604: whether judge SUM (m) value greater than SUM_Ho_Margin (m), if greater than, execution in step 605 if be not more than, is returned step 602.

Step 605: trigger and shift, network side is transferred to adjacent sub-district m with MS.Method how to carry out transfer belongs to prior art.

When method shown in Figure 6 is applied to Fig. 2 or situation shown in Figure 3,, can trigger transfer as long as the requirement of service quality is provided with rational points transfer threshold value according to network.Such as: set in advance SUM_Ho_Margin (m0)=20dB, T=3s, under situation shown in Figure 2, PBGT (m0)=3.5dB continues the value that 3s has 6 PBGT (m0) afterwards, in the T=3s, SUM (m0)=3.5dB * 6=21dB〉20dB, therefore, begin the latest also can to trigger transfer when the 3s from PBGT (m0)=3.5dB; Under situation shown in Figure 3, PBGT (m0)=3dB continues the value that 1.5s has 3 PBGT (m0), PBGT (m0)=11dB continues the value that 1.5s has 3 PBGT (m0), in the T=3s, SUM (m0)=3 * 3+11 * 3=42〉20dB, therefore, begin the latest also can to trigger transfer when the 1.5s from PBGT (m0)=11dB.Because 3 * 3+11 * 2=31〉20dB, 3 * 3+11 * 1=20dB is therefore according to the different situations of PBGT (m0) before the 0s on the reference axis, from PBGT (m0)=also may trigger transfer when 11dB begins 1s or 0.5s.

Method shown in Figure 6 is by being provided with rational points transfer threshold value, can solve PBGT for a long time less than and can not trigger transfer near PBGT_Ho_Margin, or begin PBGT from certain a moment and surpass PBGT_Ho_Margin and will wait until also that much set number of times threshold value could trigger the problem of transfer.

Embodiment 3: the difference of the signal quality back of adding up is compared with the points transfer threshold value.

Fig. 7 is a signal quality points transfer procedure schematic diagram, and process shown in Figure 7 comprises following steps:

Step 701: the points transfer threshold value SUM_Ho_Margin (m) of certain adjacent sub-district m is set, and the cycle is set, wherein, the cycle can be that period of time T also can be the number of times period p, such as T=3s or p=5.

Step 702: obtain the signal quality RXQUAL_NCELL (m) of this cell signal quality RXQUAL_CELL and adjacent sub-district m, and the difference of picked up signal quality, the i.e. difference of RXQUAL_NCELL (m) and RXQUAL_CELL.

The method that obtains RXQUAL_CELL and RXQUAL_NCELL (m) belongs to prior art, receives the one-shot measurement report such as the every 0.5s of network side, comprises the value of RXQUAL_CELL and RXQUAL_NCELL (m) in the measurement report.

Step 703: the value SUM (m) that the difference of RXQUAL_NCELL (m) and RXQUAL_CELL adds up in the cycle that obtains to be provided with in the step 701, SUM (m) are specifically as expression formula (6):

$\mathrm{SUM}\left(m\right)=\underset{n=1}{\overset{N}{\mathrm{\Σ}}}[\mathrm{RXQUAL}\_\mathrm{NCELL}(m,n)-\mathrm{RXQUAL}\_\mathrm{CELL}\left(n\right)]$

(6)

In the expression formula (6), the implication of each parameter is as follows:

N is: this sub-district that network side obtains respectively in the cycle that sets in advance and the number of times of adjacent cell signal quality measured values;

(m n) is RXQUAL_NCELL: the n time down receiving signal quality of adjacent sub-district m, 1＜n＜N;

RXQUAL_CELL (n) is: the n time down receiving signal quality of this sub-district, 1＜n＜N.

By step 702, when step 703 obtains SUM (m), except the above-mentioned difference that in step 702, obtains RXQUAL_NCELL (m) and RXQUAL_CELL, in step 703, obtain the value that the difference of RXQUAL_NCELL (m) and RXQUAL_CELL adds up, it also can be the value that in step 702, only obtains RXQUAL_CELL and RXQUAL_NCELL (m), obtain the accumulated value SUM_RXQUAL_CELL of RXQUAL_CELL and the accumulated value SUM_RXQUAL_NCELL (m) of RXQUAL_NCELL (m), the difference SUM (m) of the signal quality accumulated value of reentrying=SUM_RXQUAL_NCELL (m)-SUM_RXQUAL_CELL earlier in step 703.

Such as, the every 0.5s of network side receives the one-shot measurement report, if the set cycle is a period of time T in the step 701, and p=3s, then with in the continuous 3s totally 6 times RXQUAL_CELL value addition obtain SUM_RXQUAL_CELL, with in the continuous 3s addition of totally 6 times RXQUAL_NCELL (m) value obtain SUM_RXQUAL_NCELL (m), obtain the value of SUM (m) SUM_RXQUAL_NCELL (m) in the continuous 3s-SUM_RXQUAL_CELL afterwards; If the set cycle is the number of times period p in the step 701, and T=5, then continuous 5 times RXQUAL_CELL value addition is obtained SUM_RXQUAL_CELL, the addition of continuous 5 times RXQUAL_NCELL (m) value is obtained SUM_RXQUAL_NCELL (m), obtain the value of SUM (m) SUM_RXQUAL_NCELL (m)-SUM_RXQUAL_CELL in continuous 5 times afterwards.

Step 704: whether judge SUM (m) value greater than SUM_Ho_Margin (m), if greater than, execution in step 705 if be not more than, is returned step 702.

Step 705: trigger and shift, network side is transferred to adjacent sub-district m with MS.

0.5s in the report of the every 0.5s reception of network side described in Fig. 4, Fig. 6, Fig. 7 one-shot measurement only is the convenience in order to illustrate, during practical application, can there be multiple possibility this time, such as 0.1s or 0.3s or 1s or the like.

Network side receives after the measurement report among Fig. 4, Fig. 6, Fig. 7, also can obtain mean value to averaging of the measured value of parameters preliminary treatment in the measurement report earlier, such as network side the measured value of parameters in the measurement report that receives in every 1s or the 2s equal time is averaged processing and obtain mean parameter, calculate the parameter accumulated value according to mean parameter again.

The points transfer method of introducing among embodiment 1～embodiment 3 all is that MS is by measuring the measured value of parameters that obtains the down direction received signal, network side is handled the cycle intrinsic parameter accumulated value that the back acquisition sets in advance to measured value of parameters, method of the present invention also goes for following situation: network side is by measuring the measured value of parameters that obtains the up direction signal, and cycle intrinsic parameter accumulated value through obtaining after the data processing to set in advance, parameter accumulated value and points transfer threshold value compare, if satisfy jump condition then trigger transfer.

When using method of the present invention, carrying out DATA REASONING, data processing and transfer judgement also can carry out at MS, be that MS passes through to measure the acquisition measured value of parameters, oneself carry out obtaining after the data processing cycle intrinsic parameter accumulated value that sets in advance, and compare with the points transfer threshold value, if satisfy jump condition then trigger transfer.

Method of the present invention can be applied in all communication systems that need the sub-district transfer, its implementation all is to set in advance points transfer threshold value and cycle, signal parameter in the cycle that sets in advance is carried out comparing with the points transfer threshold value after the addition, if satisfy jump condition, then trigger and shift, wherein, points transfer threshold value and cycle can be according to the requirement setting of network to service quality.

The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.

Claims (7)

1, a kind of method of sub-district transfer, the measured value of parameters of acquisition travelling carriage current service cell and adjacent sub-district is characterized in that the method includes the steps of:

A, the points transfer threshold value and the cycle of the adjacent sub-district of described travelling carriage are set;

B, calculate the parameter accumulated value in the set cycle among the step a according to the measured value of parameters that obtains, described parameter accumulated value is the accumulated value of adjacent cell signal quality and current service cell signal quality difference; Or the difference of adjacent cell signal quality accumulated value and current service cell signal quality accumulated value;

Whether parameter accumulated value described in c, the determining step b greater than the transfer gate limit value that is provided with among the step a, if greater than, travelling carriage is transferred to adjacent sub-district, if be not more than, return step b.

2, method according to claim 1, it is characterized in that, measured value of parameters comprises travelling carriage current service cell signal quality and adjacent cell signal quality, and the parameter accumulated value that obtains among the step b is the accumulated value of adjacent cell signal quality and current service cell signal quality difference.

3, method according to claim 1, it is characterized in that, measured value of parameters comprises travelling carriage current service cell signal quality and adjacent cell signal quality, and the parameter accumulated value that obtains among the step b is the difference of adjacent cell signal quality accumulated value and current service cell signal quality accumulated value.

According to each described method in the claim 1 to 3, it is characterized in that 4, the cycle described in the step a is time cycle or inferior one number time.

According to each described method in the claim 1 to 3, it is characterized in that 5, described measured value of parameters is the measured value of parameters of up direction received signal; Or be the measured value of parameters of down direction received signal.

According to each described method in the claim 1 to 3, it is characterized in that 6, obtaining the parameter accumulated value described in the step b is to carry out at network side.

According to each described method in the claim 1 to 3, it is characterized in that 7, obtaining the parameter accumulated value described in the step b is to carry out at travelling carriage.

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