CN1784061A - Method for increasing switch success ratio in broad band CDMA system - Google Patents
Method for increasing switch success ratio in broad band CDMA system Download PDFInfo
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Abstract
This invention discloses a method for raising switching success ratio in CDMA system. Said method contains 1, the radio network controller (RNC) obtaining the transmission time sequence of current switched source cell and target cell according to switching parameter after receiving switching measuring parameter reported for user equipment (UE), 2, judging whether the reported switching measuring parameter is reasonable according to the obtained transmission time sequence, if it is then receiving said switching measuring parameter, otherwise refusing said switching measuring parameter. Said invention raises system switching success ratio.
Description
Technical field
The present invention relates to the handoff technique in Wideband Code Division Multiple Access (WCDMA) (WCDMA) system, particularly improve the method for handover success rate in the WCDMA system.
Background technology
At present, the switching of WCDMA system support comprises: switch between soft handover, direct-cut operation, forward direction switching and system.Wherein, soft handover and direct-cut operation mainly are to be initiated by network side, and it mainly is that travelling carriage (UE) is initiated that forward direction switches, and switches the situation that existing network side is initiated between system, the situation that has UE to initiate again.The reason that switches comprises moving of UE, resource distribute human intervention or the like rationally.
In the WCDMA system, because neighbor cell exists with situation frequently, UE can carry out communication by multi wireless links and network, when multi wireless links merges, according to the certain standard such as the error rate etc., data from the different radio link are compared, choose quality preferably one issue the upper strata, so that the user can finish from sub-district taking over seamlessly to another sub-district, thereby reach the purpose of optimizing communication quality, the switching between this co-frequency cell is called as soft handover.Difference according to position between the sub-district, soft handover can be divided into following several situation: the 1) switching that takes place between the different sub-district in base station node B, in this case, Radio Link can merge in Node B, or merge to base station controller (RNC), if just finish merging in Node B inside, then be referred to as More Soft Handoff; 2) switching between the different N ode B in RNC; 3) switching between different RNCs.
Wherein, soft handover and More Soft Handoff process drive by a series of measurement event.Before switching, the channel quality of UE monitoring objective sub-district, when the Target cell strength of pilot channels exceeded predefined link and adds thresholding, UE reported the 1A measurement report, and RNC adds new link in the Active Set of UE according to this 1A measurement report.When certain link place district pilots channel strength in the UE Active Set was lower than predefined link circuit deleting thresholding, UE reported the 1B measurement report, and RNC deletes ropy link according to this 1B measurement report from the Active Set of UE.When UE is in soft handover or More Soft Handoff state, multi wireless links informational needs in the Active Set merges in the UE side, this identical information that just requires multi wireless links to send can arrive UE substantially simultaneously, and the information synchronization here realizes by carry out System Frame Number and Connection Frame Number observed time difference (SFN-CFN observed timedifference) measurement in the UE side.
Wherein, described System Frame Number (SFN) adds 1 cycle counter for every 10ms, and count range is [0..4095], is the synchronous base between the sub-district in the Node B, and SFN broadcasts in the sub-district, the sequential of different districts in the Node B that is used to stagger; Described Connection Frame Number (CFN) adds 1 cycle counter for every 10ms, and count range is [0..255], and when setting up the link connection, RNC distributes the CFN of this link, as this link-attached synchronous base.In soft handover and More Soft Handoff process, CFN remains unchanged, and the synchronized relation between SFN and the CFN is represented with frame biasing (FrameOffset) and chip offsets (ChipOffset) in the RNC side.Here, FrameOffset unit is 10ms, and span is [0..255], the whole number of frames that differs between expression SFN and the CFN; ChipOffset unit is a chip, and span is [0..38399], and the sequential between expression SFN and the CFN is except that the whole frame number that differs above-mentioned FrameOffset expression, and a frame that is differed is with interior number of chips.
When soft handover or More Soft Handoff took place, UE measured the SFN of Target cell and the difference of injection time between the CFN, is expressed as OFF * 38400+Tm, and this difference of injection time is included in the 1A measurement report reported RNC.Wherein, OFF represents the frame deviation that UE measures, Tm represents the chip deviation that UE measures, RNC receives after the OFF and Tm parameter that UE reports, the FrameOffset of this Target cell that self is preserved and the value that ChipOffset is updated to this OFF and Tm respectively increase/set up signaling by Radio Link and dispose the B to Node; Simultaneously, issue the activating set updating order to UE, and convert Tm to dedicated physical channel frames biasing (DPCH FrameOffset), its expression formula is: DPCH FrameOffset=(Tm+128)/256; Node B and UE will finish the information synchronization of cell-of-origin and Target cell link in the handoff procedure according to these parameters that receive.
But, when OFF that measures as UE and/or Tm value are wrong, synchronization mechanism in the existing handoff procedure will cause FrameOffset, ChipOffset parameter to Node B configuration and the DPCH FrameOffset parameter error that disposes to UE, thereby cause handoff failure.At present, also there is not a kind of method that the reasonability of UE measurement result is adjudicated in the WCDMA handoff technique, and in the test of practical application, have been found that in some cases, UE has 1～2% measurement result to have apparent error, these wrong measurement results will cause RNC to give Node B and UE according to the handover measurement parameter configuration synchronization parameter of mistake, thereby can't finish UE taking over seamlessly between from the cell-of-origin to the Target cell.
As seen, because there is higher error rates in the handover measurement parameter of UE, therefore system's success rate for switching is lower at present, has had a strong impact on the current business quality.
Summary of the invention
In view of this, main purpose of the present invention is to provide the method for handover success rate in a kind of WCDMA of the raising system, whether the handover measurement parameter that makes RNC can judge that UE reports is reasonable, thereby guarantee that the handover measurement parameter that RNC uses UE accurately to report carries out hand-off process, and then improve the entire system handover success rate.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention discloses a kind of method that improves handover success rate in the broadband CDMA system, this method comprises:
After a.RNC receives the handover measurement parameter that UE reports, according to the emission sequential of this handover measurement parameter acquiring current handover source sub-district and Target cell;
B. the cell-of-origin that is obtained according to step a and the emission sequential of Target cell, whether the handover measurement parameter that the described UE of determining step a reports is reasonable, if rationally, accept this handover measurement parameter; Otherwise refuse this handover measurement parameter.
Among the step a, the described method of obtaining sub-district emission sequential is: RNC obtains the RNC frame number (RFN) of this sub-district correspondence and the difference of injection time between the SFN according to cell ID, and the SFN of this sub-district and the difference of injection time between the CFN; Calculate the emission sequential of this sub-district then according to the difference of injection time between the difference of injection time between this RFN and the SFN and SFN and the CFN.
Among the step a, the method for described calculation plot emission sequential is: get difference of injection time between this cell RF N and the SFN, with SFN and CFN between the difference of injection time sum launch sequential as this sub-district.
Wherein, the described method that obtains difference of injection time between cell RF N and the SFN is: RNC obtains the difference of injection time between cell RF N and the base station node B frame number (BFN); And obtain corresponding RFN in this sub-district and the difference of injection time between the SFN with difference of injection time between the SFN according to this sub-district BFN of the difference of injection time between this RFN and the BFN and self configuration.
Wherein, RNC obtains the difference of injection time between each cell RF N and the BFN in advance, and, obtain the RFN of self each sub-district of having jurisdiction over and the difference of injection time between the SFN according to each sub-district BFN of the difference of injection time between this each cell RF N and the BFN and self configuration and the difference of injection time between the SFN; Among the step a, the described method that obtains difference of injection time between cell RF N and the SFN is: RNC obtains the RFN of this sub-district correspondence and the difference of injection time between the SFN according to the resulting difference of injection time of self having jurisdiction between each cell RF N and the SFN of cell ID inquiry.
Wherein, RNC obtains the difference of injection time of self having jurisdiction between each cell RF N and the BFN in advance; Among the step a, the described method that obtains difference of injection time between cell RF N and the SFN is: RNC self is had jurisdiction over difference of injection time between each cell RF N and the BFN according to what cell ID inquiry obtained, obtain RFN and the difference of injection time between the BFN and this sub-district BFN of self configuration and the difference of injection time between the SFN of this sub-district correspondence, according to the difference of injection time between the difference of injection time between this cell RF N and the BFN and BFN and the SFN, obtain the RFN of this sub-district correspondence and the difference of injection time between the SFN then.
Among the step a, described when obtaining cell-of-origin emission sequential, difference of injection time is between SFN that is obtained and the CFN: the frame biasing FrameOffset and the chip offsets ChipOffset of this cell-of-origin that RNC self preserves.
Among the step a, described when obtaining Target cell emission sequential, difference of injection time is between SFN that is obtained and the CFN: frame biasing OFF and chip offsets Tm in the handover measurement parameter that UE reports.
Wherein, the method for difference of injection time is between described RFN of obtaining and the BFN: obtain by the node synchronizing process between RNC and the Node B.
Among the step b, describedly judge whether reasonable method is the handover measurement parameter: whether in the decision threshold that sets in advance, judge whether current handover measurement parameter is reasonable according to the emission difference of injection time of this cell-of-origin and Target cell.
By such scheme as can be seen, key of the present invention is: the handover measurement parameter acquiring current handover source sub-district that the UE that the RNC basis receives reports and the emission sequential of Target cell; Then according to the emission sequential of cell-of-origin and Target cell, judge whether the handover measurement parameter that UE reports is reasonable, thereby whether decision accepts current handover measurement parameter.
Therefore, the method that improves handover success rate in the WCDMA system provided by the present invention, the measurement report that reports in the time of can be to UE soft handover/More Soft Handoff is analyzed, judge the wherein reasonability of handover measurement parameter, and only accept rational handover measurement parameter and come to be UE and Node B configuration switching synchronization parameter, thereby avoided because of UE measures the wrong handoff failure that causes, not only improved handover success rate, the assurance quality of service of WCDMA entire system, also to a certain degree saved system resource.
Description of drawings
Fig. 1 is the inventive method one preferred embodiment handling process schematic diagram.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
The invention provides the method for handover success rate in a kind of WCDMA of the raising system, its main design philosophy is: when UE carries out soft handover/More Soft Handoff, the handover measurement parameter that RNC reports according to UE, obtain the cell-of-origin of current switching and the emission sequential of Target cell, whether and reasonable according to the emission difference of injection time handover measurement parameter whether the judgement current UE reports in the decision threshold that sets in advance of cell-of-origin and Target cell, thereby whether decision accepts this handover measurement parameter.
Fig. 1 is the inventive method one preferred embodiment handling process schematic diagram, and as shown in Figure 1, concrete treatment step comprises:
Step 101: UE from the cell-of-origin when Target cell switches, RNC receives the 1A measurement report that UE reports, and comprises the handover measurement parameter that UE measures in this report, this handover measurement parameter comprises: the SFN of Target cell and the difference of injection time between the CFN etc.Here, described soft handover or the More Soft Handoff that switches to RNC inside.
Step 102:RNC can obtain the RNC frame number (RFN) of current cell-of-origin and Target cell correspondence and the difference of injection time between the SFN respectively according to cell-of-origin and Target Cell Identifier in the 1A measurement report that receives.
Wherein, RNC can at first obtain difference of injection time between RFN and the Node B frame number (BFN) and the difference of injection time between BFN and the SFN, and then these two kinds of difference of injection time additions are obtained difference of injection time between RFN and the SFN.Described RFN is the inter-sync benchmark of RNC, results from the inner brilliant frame of RNC or is locked in network clock source, and for every 10ms adds 1 cycle counter, its count range is [0..4095].Described BFN is the inter-sync benchmark of Node B, results from the inner brilliant frame of Node B or is locked in network clock source, and for every 10ms adds 1 cycle counter, its count range is [0..4095].
Here, the method that described RNC obtains difference of injection time between RFN and the BFN can have multiple, the present invention does not limit, usually use the node synchronizing process to obtain, be exactly specifically: RNC sends packet to the Node B that self connects, and return this packet at once after ordering Node B to receive this packet simultaneously, thereby can calculate from self sending this packet to the difference of injection time that receives from Node B this packet, and then obtain difference of injection time between RFN and the BFN, this difference of injection time can be as accurate as 0.125ms, and promptly RNC step-length minimum that the time is counted can be 0.125ms.
In addition, described SFN derives from BFN, and the T_cell that is used to distinguish each sub-district sequential by the basic adjusted at BFN obtains, SFN=BFN+T_cell usually, thus can obtain each the sub-district corresponding SFN relevant with this BFN.Described T_cell is distributed by RNC, and its span is [0..9], and unit is 256 chips.Like this, RNC just obtains self having jurisdiction over the BFN of each sub-district correspondence and the difference of injection time T_cell between the SFN by configuration.
Because RNC can access the RFN that self has jurisdiction over each Node B correspondence and the difference of injection time between the BFN, the BFN of inner each the sub-district correspondence of Node B and the difference of injection time between the SFN have been disposed again, therefore with these two difference of injection time additions, get the surplus behind the duration of its sum mould 256 frames again, can obtain RNC and have jurisdiction over the RFN of each sub-district correspondence and the difference of injection time between the SFN, be expressed as TimeOffset.This TimeOffset can represent that its precision is 0.125ms with the variable of 15 bit bit wides.Because this TimeOffset is: RNC counts the difference of injection time that obtains with the 0.125ms step-length and calculates absolute duration, gets the surplus behind these absolute duration mould 256 frame durations again; Therefore the maximum occurrences of this TimeOffset is less than the duration of 256 frames, and only than the little counting step-length of 256 frame durations, and its maximum occurrences can be expressed as (duration of 256 frames-0.125ms), then with the frame be that the span of unit is expressed as [0..256).
Based on the computational methods of above-mentioned TimeOffset, in actual handover process, the implementation that RNC obtains cell-of-origin and Target cell TimeOffset mainly contains two kinds:
One, the static in advance TimeOffset that safeguards self each sub-district of having jurisdiction over of RNC, suppose that the sub-district number that RNC supports is N, then RNC can safeguard the array of difference of injection time between the RFN that is used to write down each sub-district correspondence and the SFN as stated above in advance, is expressed as A=[TimeOffset
0, TimeOffset
1... TimeOffset
N-1], in this step, RNC just can obtain the TimeOffset of this cell-of-origin and Target cell correspondence respectively according to the array of difference of injection time between the RFN of the cell-of-origin of current switching and Target Cell Identifier inquiry self maintained and the SFN.
Two, RNC safeguards the RFN that self has jurisdiction over each Node B and the difference of injection time between the BFN in advance, and dynamic calculation obtains the RFN of sub-district and the difference of injection time between the SFN then.In this step, specifically be treated to: RNC can obtain this cell-of-origin and the RFN of Target cell place Node B correspondence and the difference of injection time between the BFN respectively according to this cell-of-origin and Target Cell Identifier, and obtain difference of injection time between this cell-of-origin of self configuration and the BFN of Target cell correspondence and the SFN respectively, calculate the RFN of this cell-of-origin and Target cell correspondence and the difference of injection time between the SFN then.
Step 103:RNC obtains the emission sequential of this cell-of-origin and Target cell according to the FrameOffset and the ChipOffset of the current handover source sub-district of the TimeOffset of step 102 resulting current handover source sub-district and Target cell, handover measurement parameter that UE reports and self maintained.
Here, when UE connects, RNC will for this UE configuration FrameOffset and ChipOffset to insert the sub-district, when this UE switches to new sub-district, RNC will preserve the FrameOffset and the ChipOffset of the current new sub-district of UE according to the measurement report of UE, therefore, when UE switched, RNC preserved FrameOffset and the ChipOffset of UE at cell-of-origin and Target cell link respectively.
Suppose: UE switches to sub-district b from sub-district a, and handover measurement parameter OFF and Tm in the 1A report that UE reports are expressed as OFF respectively
0And Tm
0, UE is expressed as FO respectively at the FrameOffset and the ChipOffset of sub-district a link
aAnd CO
a, the difference of injection time of the cell-of-origin of current switching and the RFN of Target cell and SFN is expressed as TimeOffset respectively
aAnd TimeOffset
b, the emission sequential of the cell-of-origin of current switching and Target cell is respectively x
1And x
2, the process of then calculating cell-of-origin and Target cell emission sequential is as follows:
According to background technology as can be known, FO
a* 38400+CO
aFor UE at the CFN of sub-district a and the difference of injection time of SFN, unit is a number of chips.TimeOffset
aFor difference of injection time between the RFN of sub-district a and the SFN, be unit, then TimeOffset with 0.125ms
a* 0.125 * 3840 expression RFN of sub-district a and the difference of injection time between the SFN, and be unit with the number of chips.Because, FO
aThe span that is FrameOffset is [0..255], and unit is a frame, CO
aThe span that is ChipOffset is that the number of chips in the frame is expressed as [0..38399], then FO
a* 38400+CO
aWith the frame be unit span for [0..256), and the TimeOffset span with the frame be unit span also for [0..256), therefore, FO
a* 38400+CO
aAnd TimeOffset
a* 0.125 * 3840 directly additions, and get surplus behind its sum mould 256 * 38400, express the emission sequential x of sub-district a
1, this emission sequential x
1Owing to be surplus behind the delivery 256 * 38400, so maximum occurrences is less than 256 * 38400 chips, then be that the span of unit is expressed as with the frame [0..256), result of calculation as the formula (1):
x
1＝(FO
a×38400+CO
a+TimeOffset
a×0.125×3840)mod(256×38400) (1)
In like manner, because OFF
0* 38400+Tm
0For UE at the SFN of sub-district b and the difference of injection time of CFN, TimeOffset
b* 0.125 * 3840 is the RFN of sub-district b and the difference of injection time between the SFN, therefore can obtain the emission sequential x of sub-district b
2, this emission sequential x
2With the frame be unit span for [0..256), result of calculation as the formula (2):
x
2＝(OFF
0×38400+Tm
0+TimeOffset
b×0.125×3840)mod(256×38400) (2)
The cell-of-origin that step 104:RNC obtains according to step 103 and the emission sequential of Target cell judge whether cell-of-origin and Target cell emission difference of injection time is reasonable, if, execution in step 105; Otherwise execution in step 106.
Of the present inventionly judge whether reasonable method is cell-of-origin and Target cell emission difference of injection time: the judging threshold K that this emission difference of injection time is set, if it is reasonable that cell-of-origin and Target cell emission difference of injection time in K, are then adjudicated cell-of-origin and Target cell emission difference of injection time; Otherwise judgement cell-of-origin and Target cell emission difference of injection time are unreasonable.
Wherein, if abs is (x
1-x
2)＞K can illustrate that then cell-of-origin and Target cell emission difference of injection time is in K.In addition, because x
1And x
2With the frame be unit span for [0..256), then for sub-district emission sequential, 0 frame can be seen as identical emission sequential with 256 frames, therefore, if abs (x
1-x
2)＞256 * 38400-K can illustrate that also cell-of-origin and Target cell emission difference of injection time is in K.
According to above theory, the judgement of this step is specifically as follows: judge x
1And x
2Whether satisfy abs (x
1-x
2)＜K or abs (x
1-x
2The condition of)＞256 * 38400-K if satisfy, illustrates that cell-of-origin and Target cell emission difference of injection time is reasonable, execution in step 105; Otherwise illustrate that cell-of-origin and Target cell emission difference of injection time is unreasonable, execution in step 106.
Here, rule of thumb, the difference of cell-of-origin and Target cell emission sequential is in 1 frame the time, RNC can complete successfully the merging of cell-of-origin and Target cell link, therefore, it is the number of chips of 1 frame that K is set to 38400 usually, but the present invention does not limit the concrete value of K.
The handover measurement Rational Parameters that step 105:RNC judgement current UE reports is accepted the 1A measurement report that current UE reports, and finishes to work as pre-treatment.
The handover measurement parameter that step 106:RNC judgement current UE reports is unreasonable.
The 1A measurement report that step 107:RNC refusal current UE reports is deleted the link of UE in the current goal sub-district from the Active Set of UE, and the resource of notifying Node B to discharge deleted link correspondence, thereby UE will report the 1A measurement report again.
In the present embodiment, above-mentioned steps 101 is carried out to new link has been added in the processing of step 106 in the Active Set of UE after, the present invention also can be after UE reports the 1A measurement report, and in Active Set, add before the new link, carry out the described processing of step 101 to step 106, thereby step 107 becomes: the 1A measurement report that RNC deletion current UE reports, and notice UE reports the 1A measurement report again.
As seen, through the processing of step 107, RNC can avoid the link with wrong sequential that UE reports is added the into Active Set of UE, thereby can prevent the handoff failure that produces because of the link that uses wrong sequential in the Active Set.
In sum, use the inventive method, RNC can be when UE carries out soft handover/More Soft Handoff, the handover measurement Rational Parameters that UE reports is adjudicated, thereby in time find the mistake of UE measurement result, indicate it to remeasure, improve handover success rate by the accuracy that guarantees UE handover measurement parameter, significantly reduced the negative effect that quality of service is caused because of handoff failure, and perfect key technology in this WCDMA system of soft handover/More Soft Handoff.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.All any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all be included in protection scope of the present invention.
Claims (10)
1, a kind of method that improves handover success rate in the broadband CDMA system is characterized in that, this method comprises:
A. after base station controller RNC receives the handover measurement parameter that mobile station UE reports, according to the emission sequential of this handover measurement parameter acquiring current handover source sub-district and Target cell;
B. the cell-of-origin that is obtained according to step a and the emission sequential of Target cell, whether the handover measurement parameter that the described UE of determining step a reports is reasonable, if rationally, accept this handover measurement parameter; Otherwise refuse this handover measurement parameter.
2, method according to claim 1, it is characterized in that, among the step a, the described method of obtaining sub-district emission sequential is: RNC obtains the RNC frame number RFN of this sub-district correspondence and the difference of injection time between the system frame number SFN according to cell ID, and the difference of injection time between the SFN of this sub-district and the Connection Frame Number CFN; Calculate the emission sequential of this sub-district then according to the difference of injection time between the difference of injection time between this RFN and the SFN and SFN and the CFN.
3, method according to claim 2 is characterized in that, among the step a, the method for described calculation plot emission sequential is: get difference of injection time between this cell RF N and the SFN, with SFN and CFN between the difference of injection time sum launch sequential as this sub-district.
4, method according to claim 2 is characterized in that, the described method that obtains difference of injection time between cell RF N and the SFN is: RNC obtains the difference of injection time between cell RF N and the base station node B frame number BFN; And obtain corresponding RFN in this sub-district and the difference of injection time between the SFN with difference of injection time between the SFN according to this sub-district BFN of the difference of injection time between this RFN and the BFN and self configuration.
5, method according to claim 4, it is characterized in that, RNC obtains the difference of injection time between each cell RF N and the BFN in advance, and, obtain the RFN of self each sub-district of having jurisdiction over and the difference of injection time between the SFN according to each sub-district BFN of the difference of injection time between this each cell RF N and the BFN and self configuration and the difference of injection time between the SFN;
Among the step a, the described method that obtains difference of injection time between cell RF N and the SFN is: RNC obtains the RFN of this sub-district correspondence and the difference of injection time between the SFN according to the resulting difference of injection time of self having jurisdiction between each cell RF N and the SFN of cell ID inquiry.
6, method according to claim 4 is characterized in that, RNC obtains the difference of injection time of self having jurisdiction between each cell RF N and the BFN in advance;
Among the step a, the described method that obtains difference of injection time between cell RF N and the SFN is: RNC self is had jurisdiction over difference of injection time between each cell RF N and the BFN according to what cell ID inquiry obtained, obtain RFN and the difference of injection time between the BFN and this sub-district BFN of self configuration and the difference of injection time between the SFN of this sub-district correspondence, according to the difference of injection time between the difference of injection time between this cell RF N and the BFN and BFN and the SFN, obtain the RFN of this sub-district correspondence and the difference of injection time between the SFN then.
7, according to each described method of claim 2 to 6, it is characterized in that, among the step a, described when obtaining cell-of-origin emission sequential, difference of injection time is between SFN that is obtained and the CFN: the frame biasing FrameOffset and the chip offsets ChipOffset of this cell-of-origin that RNC self preserves.
According to each described method of claim 2 to 6, it is characterized in that 8, among the step a, described when obtaining Target cell emission sequential, difference of injection time is between SFN that is obtained and the CFN: frame biasing OFF and chip offsets Tm in the handover measurement parameter that UE reports.
9, according to each described method of claim 4 to 6, it is characterized in that the method for difference of injection time is between described RFN of obtaining and the BFN: obtain by the node synchronizing process between RNC and the Node B.
10, according to each described method of claim 1 to 6, it is characterized in that, among the step b, describedly judge whether reasonable method is the handover measurement parameter: whether in the decision threshold that sets in advance, judge whether current handover measurement parameter is reasonable according to the emission difference of injection time of this cell-of-origin and Target cell.
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Cited By (3)
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| CN103139857A (en) * | 2007-08-22 | 2013-06-05 | 华为技术有限公司 | Communication system, network switching processing method and network switching processing device |
| CN103428763A (en) * | 2012-05-22 | 2013-12-04 | 中兴通讯股份有限公司 | Method and device for correcting wireless link frame offset |
| CN104053202A (en) * | 2013-03-12 | 2014-09-17 | 中兴通讯股份有限公司 | Cell primary scrambling code conflict identification, soft handover and adjacent cell list generating method and device |
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| CN1132470C (en) * | 2000-05-19 | 2003-12-24 | 华为技术有限公司 | Soft change-over method of CDMA mobile communication system |
| CN1132471C (en) * | 2000-06-23 | 2003-12-24 | 华为技术有限公司 | Soft switching method for CDNA system |
| US7054631B2 (en) * | 2000-10-23 | 2006-05-30 | Denso Corporation | Enhancement of soft handoff in a mobile wireless network through the use of dynamic information feedback from mobile users |
| CN1263239C (en) * | 2001-12-29 | 2006-07-05 | 中兴通讯股份有限公司 | Soft switching method in wideband CDMA system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103139857A (en) * | 2007-08-22 | 2013-06-05 | 华为技术有限公司 | Communication system, network switching processing method and network switching processing device |
| US9655011B2 (en) | 2007-08-22 | 2017-05-16 | Huawei Technologies Co., Ltd. | Communication system, network handover processing method and apparatus |
| CN103428763A (en) * | 2012-05-22 | 2013-12-04 | 中兴通讯股份有限公司 | Method and device for correcting wireless link frame offset |
| CN103428763B (en) * | 2012-05-22 | 2018-05-04 | 中兴通讯股份有限公司 | The inclined method and device for correcting of Radio Link frame |
| CN104053202A (en) * | 2013-03-12 | 2014-09-17 | 中兴通讯股份有限公司 | Cell primary scrambling code conflict identification, soft handover and adjacent cell list generating method and device |
| CN104053202B (en) * | 2013-03-12 | 2018-10-23 | 南京中兴软件有限责任公司 | Subzone main scramble conflict set recognition, soft handover and list generation method and device |
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| CN100403845C (en) | 2008-07-16 |
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