CN106162770B - A kind of cell switching control method - Google Patents
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Abstract
This application discloses a kind of cell switching control methods, it include: a, network side for before or while main measurement related for user equipment (UE) configuration intersystem handover, additional measurement is configured for the UE, the additional measurement includes with the additional measurement of frequency and/or the additional measurement of alien frequencies；B, when network side receives the main measurement report for the measurement result with the additional measurement that the UE is reported, according to intra-system handover preferential principle, the Target cell that the UE needs to switch is determined, and trigger the UE and be switched in the Target cell.Using the problems such as signaling congestion of core net when UE switches can be effectively reduced in the present invention, UE energy consumption expense is big, handover delay is long.
Description
Technical field
The present invention relates to mobile communication technologies, more particularly to a kind of cell switching control method.
Background technique
With the extensive commercialization of LTE, areal simultaneously can be increasingly common by the case where network coverage of three kinds of standards,
It supports more wide band user equipment (User Equipment, UE) that can also become mainstream in future development, therefore will appear
A large amount of intersystem handovers.Intersystem handover, that is, 2G (Generation Mobile Telecommunication System technology), 3G are supported in standard agreement at present
The switching between any two of (3rd generation mobile communication technology) and 4G (fourth generation mobile communication technology) system, commercial network are also got over
Carry out more supports function.The 2G system of mainstream includes GSM, cdma system etc., 3G system include WCDMA, TDS-CDMA,
CDMA2000 etc., 4G system mainly include LTE system.
The initiation of switching flow is mainly the measurement report content that network side is reported according to UE at present, if UE current clothes
The cell signal quality either load that is deteriorated of being engaged in is heavier, then chooses that other signal qualities are preferable, the lighter cell of load is as mesh
Cell is marked, UE is switched in Target cell.
Network side can measure configuration for UE first to monitor the quality condition of the Radio Link of UE, and the process is main
Including configuration measurement type, such as: common frequency measurement, different-frequency measure, isosystem measurement, transmission power and position；Configuration report mould
Formula, such as: event triggering and periodic report.UE can be measured according to the measurement control message received and be reported measurement result
To network side.After network side receives the measurement report that UE is reported, decision will do it, if UE is switched to other cells or frequency point
And UE is switched to which cell or frequency point.Last network side can execute switching according to the result of decision.
In above-mentioned existing cell handover scheme, due in selection target cell it is not intended that selected Target cell
It whether is homologous ray cell, in this way it is possible to which from the side UE, report comes up first in the presence of the measurement result due to different system adjacent cell
Although etc. reasons cause to have available candidate target cells but the switching of different system has occurred in current system, waste and be
Unite resource, rob and account for different system resource, different system signal or resource it is unstable if the terminal switchback original system may be caused
Frequent intersystem handover situation.And continually intersystem handover will lead to the signaling congestion of core net, the more electric energy in the side UE
The problems such as time delay of consumption and handoff procedure is longer, no matter from operator's angle or user experience angle, these problems are all
It can bring a negative impact.
And a kind of method that can effectively solve the problem that the above problem is not yet proposed at present.
Summary of the invention
In view of this, this method can be effective the main purpose of the present invention is to provide a kind of cell switching control method
The signaling congestion of core net, the problems such as UE energy consumption expense is big, handover delay is long when reducing UE switching.
In order to achieve the above object, technical solution proposed by the present invention are as follows:
A kind of cell switching control method, comprising:
A, network side is before or while main measurement related for user equipment (UE) configuration intersystem handover, is the UE
The additional measurement of configuration, the additional measurement include with the additional measurement of frequency and/or the additional measurement of alien frequencies；
B, it when network side receives the main measurement report for the measurement result with the additional measurement that the UE is reported, presses
Switch preferential principle in lighting system, determines the Target cell that the UE needs to switch, and trigger the UE and be switched to the mesh
It marks in cell.
In conclusion cell switching control method proposed by the present invention, in the related main measurement of configuration intersystem handover
It is preceding or simultaneously, additional measurement is configured, then preferentially select progress intra-system handover according to additional measurement in switching, such as
This, it is possible to reduce the number switched between different system, so as to effectively avoid core caused by continually intersystem handover
The problems such as extending more than net signaling congestion, the side UE power consumption and when handoff procedure.
Detailed description of the invention
Fig. 1 is the flow diagram of the embodiment of the present invention one.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, right below in conjunction with the accompanying drawings and the specific embodiments
The present invention is described in further detail.
Core of the invention thought is: before or while the related main measurement of configuration intersystem handover, configuring additional survey
Amount, to guarantee that network side can preferentially select to carry out intra-system handover according to additional measurement, so, it is ensured that in system
Switching is preferential, guarantees the utilization rate of this system resource to the full extent, the number switched between different system is reduced, so as to have
Effect avoids signaling congestion, the more power consumptions in the side UE and the handoff procedure of core net caused by continually intersystem handover
Time delay it is longer the problems such as.
Fig. 1 is the flow diagram of the embodiment of the present invention one, as shown in Figure 1, the embodiment specifically includes that
Step 101, network side are
The additional measurement of UE configuration, the additional measurement include with the additional measurement of frequency and/or the additional measurement of alien frequencies.
This step, with existing system the difference is that matching before or while the related main measurement of configuration intersystem handover
Additional measurement is set, hereafter can preferentially to carry out intra-system handover according to additional measurement in switching.
Specifically, the measurement amount of the additional measurement is received signal power or the signal-to-noise ratio for receiving signal.
Preferably, it is described with frequency is additional be measured as UE and report main measurement report when, add homogeneous-frequency adjacent-domain measurement result together
Be reported to network side, the alien frequencies is additional when being measured as UE and reporting main measurement report, add alien frequencies nearby region measurement result together on
Offer network side.
In practical applications, preferably, the related main measurement of the intersystem handover specifically includes any one following group
It closes:
When the measurement amount of other systems is higher than thresholding 2 while being lower than thresholding 1 using the measurement amount of frequency point in system, on UE
Report measurement report；When being lower than the measurement amount of other systems using the measurement amount of frequency point in system, UE reporting measurement reports；Other are
When the measurement amount of system is higher than thresholding 3, UE reporting measurement reports；When the error probability for receiving and/or sending is higher than thresholding 4, on UE
Report measurement report；When the transmission power of UE is greater than thresholding 5, UE reporting measurement reports；The transmission power of UE reaches maximum and sends function
When rate, UE reporting measurement reports；When the received signal strength indicator of UE reaches the lower limit of reception dynamic range of UE, UE reports survey
Amount report；And/or periodically report the measurement report comprising isosystem measurement result.
Specifically, the error probability of the reception and/or transmission is the bit error rate for receiving and/or sending, or to receive
And/or the Block Error Rate sent.
Being specifically defined for above-mentioned main measurement is consistent with existing system, and details are not described herein.
Step 102 receives the main measurement report for the measurement result with the additional measurement that the UE is reported when network side
When announcement, according to intra-system handover preferential principle, the Target cell that the UE needs to switch is determined, and trigger the UE and be switched to
In the Target cell.
What needs to be explained here is that in existing system after UE receives the measurement control that network side issues, it will be according to survey
Configuration in amount control measures, and when measurement result meets the report reporting condition of measurement control configuration, then to net
Network side report measurement results.Since the main measurement control of network side configuration in a step 101 is containing additional measurement list, then work as master
When measurement report meets report condition, UE needs to carry all available additional measurements for including in additional measurement list
It is reported to network side together in main measurement report.
This step, with existing system the difference is that network side is receiving main measurement report related with intersystem handover
When, it will be considered that switching switches with different system in compartment system, preferentially selects intra-system handover to pass through, to reduce different system switching
Number, so as to avoiding core network signalling congestion caused by continually intersystem handover situation, UE power consumption big and
The problems such as handover delay is long.
Preferably, this step can specifically be realized using following step:
When step 1021, network side receive the main measurement report that the UE is reported, according in the main measurement report
The measurement result of the additional measurement carried is selected preferential from the corresponding adjacent area of measurement result of the additional measurement
Carry out the candidate cell of intra-system handover.
In practical applications, after network side receives the measurement report that UE is reported, it usually needs switching flow is executed for UE,
RNC needs for UE selection target cell.It is not all same frequencies that UE is reported in order to ensure the success rate of switching in this step
And/or alien frequencies adjacent area all can serve as Target cell, these adjacent areas, which must reach certain condition, can just become candidate cell,
Then network side selects best one from all candidate cells.
Preferably, the preferential candidate cell for carrying out intra-system handover can be selected in this step using following methods:
Each adjacent area corresponding for the measurement result of the additional measurement, if the measurement result of its additional measurement
Not less than the service of the absolute handoff threshold of preset candidate cell and/or the measurement result of its additional measurement and the UE
The adjacent area with respect to handoff threshold, is then determined as the candidate not less than preset candidate cell by the difference of the measurement result of cell
Cell.
Preferably, if network side currently without the serving cell measurement result, in the above-mentioned methods can benefit
The measurement result of the serving cell is substituted with preset default value.Such as if measurement amount is RSCP, serving cell
RSCP default value can be -120dBm.
If the quantity of step 1022, the candidate cell is zero, 1025 are thened follow the steps, otherwise, executes step 1023.
In this step, if not selecting suitable candidate cell, step 1025 will be executed, by using the side of blind choosing
The switching of formula selection target cell triggering cell.If there is candidate cell, 1023,1024 are thened follow the steps, preferentially selects and is used for
The Target cell of intra-system handover.
Step 1023, according to the measurement result of the corresponding additional measurement of the candidate cell, determine that the candidate is small
The switching priority in area.
It, will be according to measurement result, according to raising signal as far as possible in order to ensure the communication quality of the UE after switching in this step
The principle of the switching priority of high-quality cell, to determine the switching priority of each candidate cell.
Preferably, being based on mentioned above principle, step 1023 can be realized using following either method:
Method one, according to the higher principle of the bigger switching priority of measurement result of the additional measurement of cell, determine
The switching priority of the candidate cell.
Method two, for each candidate cell, by the measurement result of the additional measurement of the cell and cell list
Solely biasing (CIO) is added, and according to the higher principle of the more high then switching priority of the addition result, determines the candidate cell
Switching priority.
Method three, for each candidate cell, using the cell weighting coefficient of the preset cell, to the cell
The measurement result of the additional measurement is weighted；According to the higher principle of the more high then switching priority of the weighted results, really
The switching priority of the fixed candidate cell；
Method four, according to cell the additional measurement measurement result descending, all candidate cells are carried out
Sequence, obtains First ray, according to the ascending order of the load condition of cell, is ranked up to all candidate cells, obtains the
Two sequences；For each candidate cell, according to sz=s1×a+s2× b determines the overall ranking serial number of the candidate cell
sz, wherein s1The ranking serial number for being the candidate cell in the First ray, s2It is the candidate cell in second sequence
In ranking serial number, the preset measurement result weighting coefficient of a, the preset load weighting coefficient of b, according to overall ranking serial number szMore
The higher principle of small then switching priority, determines the switching priority of the candidate cell.
Step 1024, the descending according to switching priority select a cell from the candidate cell, judge that this is small
Whether area can be used as the Target cell of intra-system handover, if it is not possible, then when there are non-selected candidate cell, after
It is continuous therefrom to select next cell and carry out the judgement, when non-selected candidate cell is not present, execute step 1025；Such as
Fruit can be to be then determined as the Target cell that the UE needs to switch for the cell, and triggering will by the way of intra-system handover
The UE is switched to the Target cell, then end step 102.
In this step, when judging that a candidate cell can be used as the Target cell of intra-system handover, triggering is adopted
The UE is switched to the Target cell with the mode of intra-system handover, terminates current cell switching if success, such as
Fruit is unsuccessful, and failure cause is inadequate resource, then will continue to select next non-selected priority from candidate cell
Highest cell, judges whether it can be used as the Target cell of intra-system handover, and is determined whether according to judging result
Attempt intra-system handover.
Here, judge whether the cell can be used as the specific method of the Target cell of intra-system handover as art technology
Personnel are grasped, and details are not described herein.
In this step when UE is switched to Target cell by the way of intra-system handover, if handover failure and failure
Reason is the other reasons in addition to inadequate resource, then explanation is current is not suitable for carrying out the switching in this system, at this point, carrying out again
Subsequent step is nonsensical, therefore in order to reduce the resource overhead of system, can also be again further UE configuration master
It measures (preferably, the parameter of main measurement can be configured to the parameter configuration for being easy to carry out different system switching), at this point, issuing main survey
It does not need to be reconfigured additional measurement when amount.Specifically, this purpose can be realized using following methods, i.e., touching in step 1024
It may further include following characteristics after sending out switching described:
When the switching result of the intra-system handover is failure, if the reason of the failure being inadequate resource, when
There are when non-selected candidate cell, continuation selects next cell from the non-selected candidate cell and carries out this step
The rapid judgement and corresponding judging result treatment process, when non-selected candidate cell is not present, from the master
The corresponding different system adjacent cell of the measurement result of measurement is currently located in different system adjacent cell of the cell with covering, choosing with the UE
The Target cell that a cell needs to switch as the UE is selected out, and triggers and is cut the UE by the way of the switching of different system
It changes in the Target cell；If the reason of failure is not inadequate resource, main measurement is configured for the UE again.
Step 1025, be currently located from the corresponding different system adjacent cell of measurement result of the main measurement or with the UE it is small
In different system adjacent cell of the area with covering, the Target cell that a cell needs to switch as the UE is selected, and trigger use
The UE is switched in the Target cell by the mode of different system switching.
It, will be by the way of blind choosing in the case where not being able to achieve intra-system handover in above-mentioned steps 1024 in this step
Selection carries out the Target cell of different system switching, i.e., from the corresponding different system adjacent cell of measurement result of the main measurement or with institute
It states UE to be currently located in different system adjacent cell of the cell with covering, it is small to select the target that a cell needs to switch as the UE
Area, to realize the cell switching of UE.
There is no specific limitations for network side in the present invention, access net side network element are primarily referred to as, such as base station controller (Base
Station Controller, BSC), radio network controller (Radio Network Controller, RNC), eNB.
Through the above scheme as can be seen that in the present invention when needing to carry out cell switching, by preferentially carrying out in system
The mode of switching can effectively reduce the frequency of different system switching, different system is avoided frequently to switch generated problems.
Present invention could apply in LTE system or UMTS system, separately below by taking two systems as an example, to tool of the invention
Body realization is illustrated:
When being applied in UMTS system, the present invention can be realized using following methods:
Step S201, RNC sending measuring controls:
In the embodiment, network side can specifically be executed by RNC network element.In order to monitor the Radio Link situation of UE, work as UE
Current radio link quality is that UE finds suitable adjacent area and switches over when being deteriorated as early as possible, guarantees business continuance, and RNC can be to
UE sending measuring control message, wherein measurement control message mainly includes the following contents:
Measurement type: sharing 8 kinds of different measurement types at present in UMTS system, also can include and survey in measurement type
Measure the information such as the relevant various parameters of report triggering conditions, event type.
Measurement mark (measurment Identity): it is used to unique identification measuring configuration, referred to as measures ID.
Measuring command (measurement command): for indicating that this measuring configuration is newly-built or modifies or release
It puts.
Measurement reports mode: being used to refer to the corresponding measurement report of this measuring configuration is by event triggering or on the period
Report and measurement report transmission mode.
Additional measurement list: being the list formed by measuring ID, wherein measuring configuration representated by all measurement ID
Measurement result can issue network side simultaneously with the measurement report of this measuring configuration.
In order to guarantee that when a switchover occurs, intra-system handover is preferential, need to provide some spies when controlling RNC sending measuring
Different limitation.Specific step is as follows:
S201-1:RNC is issued with frequency and/or different-frequency measure control as additional measurement.
There are two types of the trigger mechanism that main measurement report reports, event triggering type and preiodic types in current mechanism.Event
Triggering type be when UE measurement result meet by the RNC some events for including when measuring configuration threshold parameter etc. whens,
UE reporting measurement reports can then be triggered；And preiodic type is then that will trigger UE reporting measurement reports every one section of regular time.
It has been generally acknowledged that preiodic type measurement report will increase the signaling traffic load eated dishes without rice or wine and consume meaningless UE electric energy, therefore RNC matches for UE
Event triggering type is generallyd use when setting measurement.Under normal conditions, when UE enters connected state or UE from common signal channel from IDLE state
After state enters dedicated channel status, RNC can be that UE configures some necessary measurements, such as event trigger type according to UE ability
Common frequency measurement, different-frequency measure, isosystem measurement, transmission measurement etc..
Here regardless of whether being that UE was configured with frequency and/or different-frequency measure, in order to guarantee that intra-system handover is preferential,
The same frequency and/or different-frequency measure that RNC will configure periodic report type for UE are as additional measurement.If RNC before this step
Through configuring the same frequency and/or different-frequency measure of periodic report type for UE, then its Report Type can be No Reporting by RNC
Additional measurement is revised as to reach；Or RNC can issue same frequency and/or the different-frequency measure conduct of new periodic report type
Additional measurement, but need using the measurement ID different from having measurement ID.
Step S201-2, RNC is that UE configures the related main measurement of intersystem handover.
RNC has been that UE is configured with the same frequency of periodic report type and/or different-frequency measure is measured as additional, in this step,
RNC continues as UE configuration and switches related main measurement with different system, and the main measurement related with the switching of different system specifically includes
Below any one or it is a variety of: the measurement amount of other systems is higher than while being lower than thresholding 1 using the measurement amount of frequency point in system
When thresholding 2, UE reporting measurement reports；When being lower than the measurement amount of other systems using the measurement amount of frequency point in system, UE reports survey
Amount report；When the measurement amount of other systems is higher than thresholding 3, UE reporting measurement reports；The error probability for receiving and/or sending is higher than
When thresholding 4, UE reporting measurement reports；When the transmission power of UE is greater than thresholding 5, UE reporting measurement reports；The transmission power of UE reaches
When sending power to maximum, UE reporting measurement reports；The received signal strength indicator (RSSI) of UE reaches the reception dynamic model of UE
When the lower limit enclosed, UE reporting measurement reports；Periodic measurement report reports isosystem measurement result.For UMTS system, it is
Can be RSCP using the measurement amount of frequency point in system, the measurement amount of RSSI, signal-to-noise ratio etc., other systems can be RSRP, RSRQ,
RSSI, signal-to-noise ratio etc..RNC can use in existing specification existing event such as: 3A, 3C, 5A, 6A, 6D etc., and RNC is UE configuration
When these events trigger the main measurement of measurement report, the additional measurement of conduct in S201-1 step is inserted in additional measurement list
Same frequency and/or different-frequency measure measurement ID.
Step S202, UE report measurement results.
UE is controlled according to the measurement that RNC is issued, and when measurement result meets report condition, is then inserted corresponding result and is surveyed
In amount report and it is sent to RNC.For the main measurement of RNC configuration, when main measurement result meets report condition, UE is also wanted simultaneously
The result of additional measurement is attached to together in report and is sent to RNC.
Step S203, RNC carries out decision and triggers switching.
After receiving the measurement report that UE is reported, RNC can be extracted therefrom with frequency, the measurement knot of alien frequencies or different system adjacent cell
The quality condition of fruit and current service chain road needs to execute switching flow for UE, then if current ink quality is poor
RNC needs for UE selection target cell.It is not that all frequency and/or alien frequencies adjacent areas together that UE is reported all can serve as Target cell
, these adjacent areas, which must reach certain condition, can just become candidate cell, and then RNC is selected best from all candidate cells
One.It is following one of any with the condition that frequency and/or alien frequencies adjacent area become candidate cell: with frequency and/or alien frequencies adjacent area
Measurement amount is not less than the absolute handoff threshold of candidate cell, then the adjacent area becomes candidate cell；With the survey of frequency and/or alien frequencies adjacent area
The measurement amount that amount amount subtracts serving cell is not less than candidate cell with respect to handoff threshold, then the adjacent area becomes candidate cell.It can
Choosing, if network side does not have the measurement amount of serving cell when being filtered to same frequency and/or alien frequencies adjacent area, substituted with default value
Serving cell measurement amount, if such as measurement amount is RSCP, the RSCP default value of serving cell can be -120dBm.
After selecting candidate cell, RNC will also determine the switching of the candidate cell according to the method in abovementioned steps 1023
Priority preferentially triggers intra-system handover then according to the method in step 1024.
If not as in the same frequency of candidate cell and/or alien frequencies adjacent area or all systems to all candidate cells
Switching is attempted all to fail, then RNC attempts different system switching.
When being applied in LTE system, specifically the present invention can be realized using following methods:
Step S301, eNB sending measuring controls.
In LTE system, measurement control is issued in RRC reconfiguration message, and eNB is being issued and switched related master
It is UE configuration with frequency and/or the additional measurement of alien frequencies when measurement.The main measurement related with the switching of different system is main to measure specific packet
Include it is following any one or it is a variety of: in system using the measurement amount of frequency point lower than thresholding 1 while other systems measurement amount it is high
When thresholding 2, UE reporting measurement reports；When being lower than the measurement amount of other systems using the measurement amount of frequency point in system, UE is reported
Measurement report；When the measurement amount of other systems is higher than thresholding 3, UE reporting measurement reports；The error probability for receiving and/or sending is high
When thresholding 4, UE reporting measurement reports；When the transmission power of UE is greater than thresholding 5, UE reporting measurement reports；The transmission power of UE
When reaching maximum transmission power, UE reporting measurement reports；The received signal strength indicator (RSSI) of UE reaches the reception dynamic of UE
When the lower limit of range, UE reporting measurement reports；Periodic measurement report reports isosystem measurement result.For LTE system, it is
Can be RSRP using the measurement amount of frequency point in system, the measurement amount of RSRQ, signal-to-noise ratio etc., other systems can be RSCP, RSSI,
Signal-to-noise ratio, pilot frequency intensity, pilot phase and pilot frequency intensity etc..ENB can use in existing specification existing event such as: B1, B2
Deng.
In existing LTE system, eNB mainly includes following four part into the measurement control message that UE is issued:
Measure ID: connection measurement object ID and the unique identification for reporting ID.
Measurement object: it is made of the information such as measurement object ID and specific frequency point.
Report configuration: by report configuration ID and specific Report Type, the composition such as Report Parameters.
Parameter configuration: include some parameter informations such as filtering parameter needed for some calculating measurement results.
Facilitate the preferential additional measurement of intra-system handover since eNB needs to issue, so needing to expand measurement ID
Exhibition, measurement ID need to connect measurement object ID and report ID and additional measurement object ID list, wherein additional measurement object ID column
Table is the list being made of measurement object ID, shows that UE also needs to report additional measurement object when reporting main measurement result
The measurement result of measurement object included in ID list.
Step S302, UE report measurement results.
In existing LTE system, the measurement report that UE is reported can include the measurement result for the measurement object that measurement ID is contacted,
And it is triggered as measuring triggering mode given by the report configuration ID that ID is contacted.Therefore the measurement knot for needing to report UE
Fruit is extended, and needs to measure the measurement result one that ID contacts measurement object represented in additional measurement object ID list
And it is reported to eNB.
Step S303, eNB carries out decision and triggers switching.
After receiving the measurement report that UE is reported, eNB can be extracted therefrom with frequency, the measurement knot of alien frequencies or different system adjacent cell
The quality condition of fruit and current service chain road needs to execute switching flow for UE, then if current ink quality is poor
ENB needs for UE selection target cell.It is not that all frequency and/or alien frequencies adjacent areas together that UE is reported all can serve as Target cell
, these adjacent areas, which must reach certain condition, can just become candidate cell, and then eNB is selected most from all candidate cells again
Good one.
It is following one of any with the condition that frequency and/or alien frequencies adjacent area become candidate cell: with frequency and/or alien frequencies adjacent area
Measurement amount is not less than the absolute handoff threshold of candidate cell, then the adjacent area becomes candidate cell；With the survey of frequency and/or alien frequencies adjacent area
The measurement amount that amount amount subtracts serving cell is not less than candidate cell with respect to handoff threshold, then the adjacent area becomes candidate cell.It can
Choosing, if network side does not have the measurement amount of serving cell when being filtered to same frequency and/or alien frequencies adjacent area, substituted with default value
Serving cell measurement amount.
After selecting candidate cell, eNB will also determine the switching of the candidate cell according to the method in abovementioned steps 1023
Priority preferentially triggers intra-system handover then according to the method in step 1024.
If not as in the same frequency of candidate cell and/or alien frequencies adjacent area or all systems to all candidate cells
Switching is attempted all to fail, then eNB attempts to trigger different system switching.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (10)
1. a kind of cell switching control method characterized by comprising
A, network side is to configure before or while main measurement related for user equipment (UE) configuration intersystem handover for the UE
Additional measurement, the additional measurement include with the additional measurement of frequency and/or the additional measurement of alien frequencies；
B, when network side receives the main measurement report for the measurement result with the additional measurement that the UE is reported, according to being
Switch preferential principle in system, determine the Target cell that the UE needs to switch, and triggers the UE to be switched to the target small
Qu Zhong.
2. the method according to claim 1, wherein the related main measurement of the intersystem handover includes: system
When the measurement amount of other systems is higher than thresholding 2 while the interior measurement amount using frequency point is lower than thresholding 1, UE reporting measurement reports；
When being lower than the measurement amount of other systems using the measurement amount of frequency point in system, UE reporting measurement reports；The measurement amount of other systems
When higher than thresholding 3, UE reporting measurement reports；When the error probability for receiving and/or sending is higher than thresholding 4, UE reporting measurement reports；
When the transmission power of UE is greater than thresholding 5, UE reporting measurement reports；When the transmission power of UE reaches maximum transmission power, UE is reported
Measurement report；When the received signal strength indicator of UE reaches the lower limit of reception dynamic range of UE, UE reporting measurement reports；With/
Or periodically report the measurement report comprising isosystem measurement result.
3. according to the method described in claim 2, it is characterized in that, it is described reception and/or transmission error probability be receive and/
Or the bit error rate sent, or the Block Error Rate for receiving and/or sending.
4. the method according to claim 1, wherein described be measured as UE and report main measurement report with frequency is additional
When, additional homogeneous-frequency adjacent-domain measurement result is reported to network side together, and the alien frequencies is additional when being measured as UE and reporting main measurement report,
Additional alien frequencies nearby region measurement result is reported to network side together.
5. the method according to claim 1, wherein the step b includes:
When b1, network side receive the main measurement report that the UE is reported, according to being carried in the main measurement report
The measurement result of additional measurement is selected in preferential carry out system from the corresponding adjacent area of measurement result of the additional measurement
The candidate cell of switching；
If the quantity of b2, the candidate cell are zero, b5 is thened follow the steps, otherwise, executes step b3；
B3, according to the measurement result of the corresponding additional measurement of the candidate cell, determine that the switching of the candidate cell is excellent
First grade；
B4, the descending according to switching priority select a cell from the candidate cell, judge whether the cell can be with
As the Target cell of intra-system handover, if it is not possible, continuation therefrom selects then when there are non-selected candidate cell
Next cell simultaneously carries out the judgement, when non-selected candidate cell is not present, executes step b5；If it is then will
The cell is determined as the Target cell that the UE needs to switch, and triggers and be switched to the UE by the way of intra-system handover
The Target cell terminates the step b；
B5, cell is currently located with covering from the corresponding different system adjacent cell of measurement result of the main measurement or with the UE
In different system adjacent cell, the Target cell that a cell needs to switch as the UE is selected, and trigger and switch using different system
Mode the UE is switched in the Target cell.
6. according to the method described in claim 5, it is characterized in that, selecting preferential progress intra-system handover described in step b1
Candidate cell include:
Each adjacent area corresponding for the measurement result of the additional measurement, if the measurement result of its additional measurement is not small
In the absolute handoff threshold of preset candidate cell and/or the serving cell of the measurement result of its additional measurement and the UE
Measurement result difference not less than preset candidate cell with respect to handoff threshold, then it is small the adjacent area to be determined as the candidate
Area.
7. according to the method described in claim 6, it is characterized in that, the step b1 further comprises: if network side is current
There is no the measurement result of the serving cell, then substitutes the measurement result of the serving cell using preset default value.
8. according to the method described in claim 5, it is characterized in that, step b4 further comprises:
When the switching result of the intra-system handover is failure, if being inadequate resource the reason of the failure, work as presence
When non-selected candidate cell, continuation selects next cell from the non-selected candidate cell and carries out this step
The judgement and corresponding judging result treatment process, when non-selected candidate cell is not present, from the main measurement
The corresponding different system adjacent cell of measurement result or with the UE be currently located cell with covering different system adjacent cell in, select
One cell needs the Target cell switched as the UE, and triggers and be switched to the UE by the way of the switching of different system
In the Target cell；If the reason of failure is not inadequate resource, main measurement is configured for the UE again.
9. according to the method described in claim 5, it is characterized in that, the step b3 includes:
According to the higher principle of the bigger switching priority of measurement result of the additional measurement of cell, the candidate cell is determined
Switching priority；
Alternatively, the measurement result of the additional measurement of the cell is individually biased with cell for each candidate cell
CIO is added, and according to the higher principle of the more high then switching priority of the addition result, determines that the switching of the candidate cell is preferential
Grade；
Alternatively, for each candidate cell, using the cell weighting coefficient of the preset cell, to the described attached of the cell
The measurement result of measurement is added to be weighted；According to the higher principle of the more high then switching priority of the weighted results, determine described in
The switching priority of candidate cell；
Alternatively, the descending of the measurement result according to the additional measurement of cell, is ranked up all candidate cells, obtains
All candidate cells are ranked up, the second sequence is obtained according to the ascending order of the load condition of cell to First ray；
For each candidate cell, according to sz=s1×a+s2× b determines the overall ranking serial number s of the candidate cellz, wherein s1
The ranking serial number for being the candidate cell in the First ray, s2For ranking sequence of the candidate cell in second sequence
Number, the preset measurement result weighting coefficient of a, the preset load weighting coefficient of b, according to overall ranking serial number szIt is smaller, switch excellent
The higher principle of first grade, determines the switching priority of the candidate cell.
10. the method according to claim 1, wherein the measurement amount of the additional measurement is received signal power
Or receive the signal-to-noise ratio of signal.
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| CN110493834A (en) * | 2019-09-24 | 2019-11-22 | 京信通信系统（中国）有限公司 | A kind of method and device improving handover success rate |
| EP4042748A1 (en) * | 2019-10-11 | 2022-08-17 | Telefonaktiebolaget LM Ericsson (publ) | Measurement reporting for conditional handover candidates |
| CN113099494B (en) * | 2020-01-08 | 2022-05-03 | 大唐移动通信设备有限公司 | Information processing method, device, equipment and computer readable storage medium |
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| CN101340703A (en) * | 2007-07-02 | 2009-01-07 | 鼎桥通信技术有限公司 | Method for controlling user terminal to execute inter-system measurement |
| CN101557627A (en) * | 2008-04-10 | 2009-10-14 | 华为技术有限公司 | Method for reelecting cell, device and communication system |
| CN102264081A (en) * | 2010-05-24 | 2011-11-30 | 鼎桥通信技术有限公司 | Additional measuring method |
| CN102595523A (en) * | 2012-01-31 | 2012-07-18 | 中兴通讯股份有限公司 | Cell list processing method and device, and mobile terminal |
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| CN101340703A (en) * | 2007-07-02 | 2009-01-07 | 鼎桥通信技术有限公司 | Method for controlling user terminal to execute inter-system measurement |
| CN101557627A (en) * | 2008-04-10 | 2009-10-14 | 华为技术有限公司 | Method for reelecting cell, device and communication system |
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