CN107809775A - A kind of blind switching method, device and base station - Google Patents
A kind of blind switching method, device and base station Download PDFInfo
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- CN107809775A CN107809775A CN201610811957.3A CN201610811957A CN107809775A CN 107809775 A CN107809775 A CN 107809775A CN 201610811957 A CN201610811957 A CN 201610811957A CN 107809775 A CN107809775 A CN 107809775A
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- adjacent area
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/165—Performing reselection for specific purposes for reducing network power consumption
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The invention discloses a kind of blind switching method, device and base station, and be related to wirelessly includes with mobile communication technology field, methods described：By being detected to adjacent area, it is determined that the candidate target adjacent area for blind handover；When blind handover is triggered, optimal adjacent area is selected from the candidate target adjacent area and performs blind handover.The embodiment of the present invention selects optimal adjacent area to switch over during blind handover is performed, and so as to avoid the occurrence of the abnormal caused call drop of switching, or has a strong impact on the situation that user perceives.
Description
Technical field
The present invention relates to wireless and mobile communication technology field, more particularly to a kind of blind switching method, device and base station.
Background technology
Blind handover is a kind of key components of intra-system mobility.When base station occurs extremely, influence that can be serious is used
Family impression, waste system resource.Blind handover quickly can migrate the user of serving cell according to current serving cell state
To other cells, situations such as avoiding conversation loss, ensure that user perceives.
At present, the processing to blind handover can mainly move away the user of serving cell, the selection of Target cell, carry
Very big randomness.Especially adjacent area abnormal state or adjacent area not necessary being, adjacent area the very poor feelings of performance indications
Under condition, user can be caused can not normally to migrate and cause call drop, or there is penalty in the Target cell moved to, so as to tight
Ghost image rings user and perceived.The above situation can cause customer complaint to increase, and the part valued very much in operator's index.
The content of the invention
A kind of blind switching method, device and the base station provided according to embodiments of the present invention, it is random during solving blind handover
Handover success rate is low caused by selection Target cell and user perceives the problem of poor.
A kind of blind switching method provided according to embodiments of the present invention, including：
By being detected to adjacent area, it is determined that the candidate target adjacent area for blind handover；
When blind handover is triggered, optimal adjacent area is selected from the candidate target adjacent area and performs blind handover.
Preferably, it is described by being detected to adjacent area, it is determined that the candidate target adjacent area for blind handover includes：
By detect adjacent area state whether exception and adjacent area service quality, obtain adjacent area status information and adjacent area Service Quality
Measure information；
According to the adjacent area status information, it is determined that the candidate target adjacent area for blind handover.
Preferably, it is described according to the adjacent area status information, it is determined that the candidate target adjacent area for blind handover includes：
If the adjacent area status information is the information of adjacent area abnormal state, the abnormal adjacent area is added to blacklist,
And using adjacent area state normally other adjacent areas as candidate target adjacent area.
Preferably, the adjacent area service quality includes handoff failure number and information on load based on adjacent area performance indications,
It is described by being detected to adjacent area, it is determined that the candidate target adjacent area for blind handover further comprises：
According to priority of adjacent domain, the candidate target adjacent area is ranked up, obtains the time arranged according to priority orders
Select target adjacent area；
If priority identical adjacent area be present in the candidate target adjacent area according to priority orders arrangement, according to institute
State adjacent area quality of service information to be ranked up the priority identical adjacent area, obtain according to the tactic time of best candidate
Select target adjacent area.
Preferably, further comprise：
If by being detected to adjacent area, it is determined that without the candidate target adjacent area for blind handover, then priority is selected most
High frequency, and according to the frequency of highest priority, perform blind redirection.
The storage medium provided according to embodiments of the present invention, it stores the program for realizing above-mentioned blind switching method.
A kind of blind handover device provided according to embodiments of the present invention, including：
Candidate target adjacent area selecting module, for by being detected to adjacent area, it is determined that the candidate target for blind handover
Adjacent area；
Execution module, it is blind for when blind handover is triggered, selecting optimal adjacent area execution from the candidate target adjacent area
Switching.
Preferably, candidate target adjacent area selecting module by detect adjacent area state whether exception and adjacent area Service Quality
Amount, obtains adjacent area status information and adjacent area quality of service information, and according to the adjacent area status information, it is determined that for blind handover
Candidate target adjacent area.
Preferably, candidate target adjacent area selecting module is the information of adjacent area abnormal state in the adjacent area status information
When, the abnormal adjacent area is added to blacklist, and using adjacent area state normally other adjacent areas as candidate target adjacent area.
Preferably, the adjacent area service quality includes handoff failure number and information on load based on adjacent area performance indications,
Candidate target adjacent area selecting module is ranked up to the candidate target adjacent area, obtained according to excellent according to priority of adjacent domain
The first tactic candidate target adjacent area of level, if priority be present in the candidate target adjacent area according to priority orders arrangement
Identical adjacent area, then the priority identical adjacent area is ranked up according to the adjacent area quality of service information, obtain according to
The tactic candidate target adjacent area of best candidate.
Preferably, if by being detected to adjacent area, it is determined that without the candidate target adjacent area for blind handover, then the time
Target adjacent area selecting module is selected to select the frequency of highest priority, so that the execution module is according to the frequency of highest priority,
Perform blind redirection.
A kind of base station provided according to embodiments of the present invention, including baseband processing unit, Remote Radio Unit and antenna, its
In,
The baseband processing unit, for by being detected to adjacent area, it is determined that the candidate target adjacent area for blind handover,
And when blind handover is triggered, optimal adjacent area is selected from the candidate target adjacent area and performs blind handover.
Preferably, the baseband processing unit is additionally operable to, when not being used for the candidate target adjacent area of blind handover, select excellent
First level highest frequency, and according to the frequency of highest priority, perform blind redirection.
A kind of blind handover system provided according to embodiments of the present invention, including base station and terminal, wherein,
The base station, for by being detected to adjacent area, it is determined that the candidate target adjacent area for blind handover, and blind ought cut
Change when being triggered, optimal adjacent area selected from the candidate target adjacent area and performs blind handover, make the terminal access described in select
Optimal adjacent area.
Preferably, the base station is additionally operable to, when not being used for the candidate target adjacent area of blind handover, select highest priority
Frequency, and according to the frequency of highest priority, perform blind redirection, the highest priority for making the terminal be selected according to
Frequency search optimum subdistrict and access.
Technical scheme provided in an embodiment of the present invention has the advantages that：
The embodiment of the present invention selects optimal adjacent area to perform blind handover as Target cell during blind handover is performed, can
Handover success rate is improved, the abnormal caused call drop of switching is avoided the occurrence of or has a strong impact on the situation that user perceives.
Brief description of the drawings
Fig. 1 is blind switching method block diagram provided in an embodiment of the present invention；
Fig. 2 is blind handover device block diagram provided in an embodiment of the present invention；
Fig. 3 is each submodule schematic diagram of blind handover provided in an embodiment of the present invention；
Fig. 4 is blind handover overall traffic schematic flow sheet provided in an embodiment of the present invention；
Fig. 5 is the specific operation flow schematic diagram of blind handover provided in an embodiment of the present invention；
Fig. 6 is sequence handling process schematic diagram provided in an embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing to a preferred embodiment of the present invention will be described in detail, it will be appreciated that described below is excellent
Select embodiment to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
Fig. 1 is blind switching method block diagram provided in an embodiment of the present invention, as shown in figure 1, step includes：
Step S101：By being detected to adjacent area, it is determined that the candidate target adjacent area for blind handover.
Step S101 includes：By detect adjacent area state whether exception and adjacent area service quality, obtain adjacent area state letter
Breath and adjacent area quality of service information；If the adjacent area status information is the information of adjacent area abnormal state, by the abnormal adjacent area
Be added to blacklist, and using adjacent area state normally other adjacent areas as candidate target adjacent area；Then candidate target adjacent area is entered
Row sequence.
The step of being ranked up to candidate target adjacent area includes：According to priority of adjacent domain, the candidate target adjacent area is entered
Row sequence, obtains the candidate target adjacent area arranged according to priority orders；If the candidate's mesh arranged according to priority orders
There is priority identical adjacent area in mark, then in adjacent area according to the adjacent area quality of service information to the priority identical adjacent area
It is ranked up, obtains according to the tactic candidate target adjacent area of best candidate.
Wherein, the adjacent area service quality includes handoff failure number and information on load based on adjacent area performance indications, when
When the adjacent area of sequence identical (priority is identical) in candidate target adjacent area be present, first according to described based on adjacent area performance indications
Handoff failure number is ranked up, if still depositing sequence identical adjacent area, is ranked up according to the information on load, until final
Obtain the tactic candidate target adjacent area of best candidate.
Step S202：When blind handover is triggered, optimal adjacent area is selected from the candidate target adjacent area and performs blind handover.
Step S102 includes：The tactic candidate target adjacent area of best candidate is obtained, and from the best candidate sequentially
The optimal adjacent area for coming foremost is selected in the candidate target adjacent area of arrangement as Target cell execution blind handover, so as to service
The user of cell is migrated to the Target cell.
The embodiment of the present invention is applied to blind handover in LTE system, and the blind handover is based on the optimal adjacent area of adjacent area condition selecting.
If it should be noted that by detecting adjacent area state, find without the candidate target adjacent area for being used for blind handover, then
The frequency of highest priority is selected, and according to the frequency of highest priority, performs blind redirection.Specifically, by priority most
High frequency is sent to terminal, and the release of notice terminal links with base station, make terminal discharge with after the linking of base station, according to receiving
Highest priority frequency search cell, and access new cell.
Can be with it will appreciated by the skilled person that realizing that all or part of step in above-described embodiment method is
The hardware of correlation is instructed to complete by program, described program can be stored in computer read/write memory medium, should
Program upon execution, including step S101 to step S102.Wherein, described storage medium can be ROM/RAM, magnetic disc, light
Disk etc..
Fig. 2 is blind handover device block diagram provided in an embodiment of the present invention, as shown in Fig. 2 being selected including candidate target adjacent area
Module and execution module.
Candidate target adjacent area selecting module, for by being detected to adjacent area, it is determined that the candidate target for blind handover
Adjacent area.Specifically, candidate target adjacent area selecting module by detect adjacent area state whether exception and adjacent area Service Quality
Amount, obtains adjacent area status information and adjacent area quality of service information, and be the letter of adjacent area abnormal state in the adjacent area status information
During breath, the abnormal adjacent area is added to blacklist, and using adjacent area state normally other adjacent areas as candidate target adjacent area.Enter
One step, candidate target adjacent area selecting module is ranked up to the candidate target adjacent area, obtained according to priority of adjacent domain
The candidate target adjacent area arranged according to priority orders, if existing in the candidate target adjacent area according to priority orders arrangement
The identical that sorts adjacent area, then be ranked up to the priority identical adjacent area according to the adjacent area quality of service information, obtain
According to the tactic candidate target adjacent area of best candidate.Wherein, the adjacent area service quality includes being based on adjacent area performance indications
Handoff failure number and information on load, when being ranked up according to the adjacent area quality of service information, first according to being based on adjacent area
The handoff failure number of performance indications is ranked up, if there are still sequence identical adjacent area, further according to information on load
It is ranked up.
Execution module, it is blind for when blind handover is triggered, selecting optimal adjacent area execution from the candidate target adjacent area
Switching.Specifically, the execution module obtains best candidate order during blind handover from candidate target adjacent area selecting module
The candidate target adjacent area of arrangement, and selected from the tactic candidate target adjacent area of the best candidate and come foremost most
Excellent adjacent area performs blind handover as Target cell, so as to which the user of serving cell is migrated to the Target cell.
If it should be noted that by being detected to adjacent area, it is determined that without the candidate target adjacent area for blind handover, then
Candidate target adjacent area selecting module selects the frequency of highest priority, so that the execution module is according to highest priority
Frequency, perform blind redirection.Specifically, the frequency of highest priority is sent to terminal by the execution module, notifies terminal
Release links with base station, terminal is being discharged with after the linking of base station, being searched for according to the frequency of the highest priority that receives small
Area, and access new cell.
The embodiment of the present invention is performed in blind handover in LTE system, selects optimal adjacent area to switch over, and can be avoided the occurrence of
The abnormal caused call drop of switching, or have a strong impact on the situation that user perceives.
Fig. 3 is each submodule schematic diagram of blind handover provided in an embodiment of the present invention, as shown in figure 3, the candidate of described device
Adjacent area selecting module further comprises detection module and algoritic module.
1st, best candidate adjacent area selecting module is substantially carried out the selection and output of best candidate adjacent area, its submodule and its work(
Can be as follows：
Detection module, it is substantially carried out adjacent area state, based on handoff failure number and load caused by the performance indications of adjacent area
Acquisition of information.
Algoritic module, the neighboring BS information reported according to detection module carry out the renewal processing of neighboring BS information table, and output is optimal
Adjacent area.
2nd, blind handover execution module (i.e. execution module), according to the court verdict of best candidate adjacent area selecting module, carry out
Blind handover performs.Such as without candidate's optimal objective adjacent area, limit priority frequency is selected to perform blind redirection.
The embodiment of the present invention additionally provides a kind of base station, and the base station includes baseband processing unit, Remote Radio Unit and day
Line, wherein, the baseband processing unit is used for by being detected to adjacent area, if detecting and determining the time for having for blind handover
Target adjacent area is selected, then when blind handover is triggered, optimal adjacent area is selected from the candidate target adjacent area and performs blind handover, if inspection
The candidate target adjacent area for not being used for blind handover is surveyed and determined, then selects the frequency of highest priority, and according to highest priority
Frequency, perform blind redirection.
That is, the baseband processing unit realize the candidate target adjacent area selecting module that is provided in Fig. 2 and Fig. 3 and
The function of execution module.
Fig. 4 is blind handover overall traffic schematic flow sheet provided in an embodiment of the present invention, and the present embodiment considers the shape of adjacent area
State, most suitable adjacent area is selected to be migrated, as shown in Figure 4.
First, the step of base station determines best candidate target adjacent area according to adjacent area state
Step S201：The state of detection module periodic detection adjacent area, detecting adjacent area state respectively, (i.e. whether adjacent area state is different
Often), information on load and algoritic module is reported based on handoff failure number caused by the performance indications of adjacent area.
Handover success rate in Fig. 4 can handoff failure number caused by according to switching times and based on the performance indications of adjacent area
It is calculated.
Step S202：Algoritic module is directed to the information that detection module reports, and according to adjacent area state, priority of adjacent domain, is based on
Handoff failure number and information on load caused by the performance indications of adjacent area, the state of adjacent area is updated, and abnormal adjacent area is added
Into blacklist.
If it should be noted that next detection cycle, adjacent area state recovers normal, then from the black list (i.e. blacklist)
The normal adjacent area of middle rejecting recovery.
Step S203：Algoritic module is according to priority, handover success rate and information on load, to the normal cell of adjacent area state
It is ranked up, so as to which ranking results are exported to execution module.
2nd, the step of blind handover is to best candidate adjacent area is triggered
Step S204：When triggering blind handover, execution module is initiated to cut according to the output of algoritic module to optimal adjacent area
Change.If selected without optimal adjacent area, the frequency triggering for issuing highest priority redirects flow.
The embodiment of the present invention additionally provides a kind of base station, and what it included described in above-mentioned Fig. 2 embodiments or Fig. 3 embodiments blind cuts
Changing device.
The base station has following functions：
1st, the state of the adjacent area of periodic detection serving cell, detect respectively whether abnormal adjacent area state, information on load and
Based on handoff failure number caused by the performance indications of adjacent area.
2nd, believe according to the adjacent area state of periodic detection, based on handoff failure number, load caused by the performance indications of adjacent area
Breath, with reference to priority of adjacent domain, updates the state table of adjacent area, and abnormal adjacent area is added in blacklist.It is adjacent if the next cycle
Zone state recovers normal, and the normal adjacent area of the recovery is rejected in black list.
3rd, during optimal adjacent area selection, priority of adjacent domain is considered, based on handoff failure caused by the performance indications of adjacent area
Number and the information on load of adjacent area, specifically, priority of adjacent domain sequence is first according to, in priority of adjacent domain same case
Under, according to the information on load historical data statistical analysis based on handoff failure number caused by the performance indications of adjacent area and adjacent area,
To determine best candidate target adjacent area.
4th, when triggering blind handover, execution module is initiated to switch according to the output of algoritic module to optimal adjacent area.
If the 5th, selected without optimal adjacent area, then redirect flow according to the frequency triggering of highest priority.
The base station perform the specific implementation process of blind handover as shown in figure 5, including：
Step S301：In detection cycle, detection module detects adjacent area state, information on load and based on adjacent area respectively
Handoff failure number caused by performance indications, and report algoritic module.
Because detection needs to expend resource, detection cycle typically sets timer, before timer expiry, carries out once adjacent
Area's infomation detection, it is defined by getting all information.Next timer starts the cycle, then carries out next round detection.
Operating method：In a timer period, start detection timer, in the timing of detection timer,
Complete a wheel detection process.After timer timing terminates, detection is completed.Waiting timer time-out, starts next round.
Step S302：The information reported for detection module, algoritic module according to adjacent area state and priority of adjacent domain and
Adjacent area service quality, the state table of adjacent area is updated, and abnormal adjacent area is added in blacklist and (rejects adjacent area abnormal state
Cell).If the next cycle, adjacent area state recovers normal, is rejected in black list and recovers normal cell.
Step S303：After judging rejecting abnormalities adjacent area, if having adjacent area residue, if there is adjacent area remaining, perform step
S304, otherwise perform step S305.
Step S304：According to priority combination handover success rate and information on load, state normal cell in adjacent area is carried out
Sequence.
Principle of ordering：The cell of adjacent area abnormal state is weeded out first, and this abnormal adjacent area is added to black list
In (Black List).
Sort method can be carried out according to priority, handoff failure number and information on load based on adjacent area performance indications.
Specifically, it is preliminary to discharge adjacent area order according to priority；Under same priority, mainly according to adjacent area performance indications and load
Information is ranked up.
Because under same priority, to the factor of influence of sequence, this factor of influence of primary concern is to final goal
Influence degree, in the present embodiment, this target of primary concern handover success rate.This index factor is obtained, it is necessary to obtain
The historical data of current site, and data analysis is carried out to historical data, statistics obtains the total degree that website switches, and unites
Count out based on handoff failure number caused by the wireless performance index of adjacent area.According to this index, can count based on adjacent area without
Handover failure rate caused by linear energy, so as to discharge adjacent area order from low to high according to handover failure rate.If according to the sequence
As a result, sequence still has identical adjacent area, then discharges adjacent area order from low to high according to information on load.Further, if according to
Information on load sorts obtained result, and sequence still has identical adjacent area, then it is suitable to discharge adjacent area from high to low according to switching times
Sequence.
Step S305：If without candidate's optimal objective adjacent area, attempt limit priority frequency and walk to redirect, terminate flow.
If algoritic module can not export current optimal Neighboring Cell List (i.e. candidate target Neighboring Cell List), priority is selected
Highest frequency exports initiates blind redirection flow to execution module, execution module according to this frequency point information.
Step S306：Execution module carries out the blind handover trial of optimal adjacent area according to the court verdict of algoritic module.
When serving cell triggering blind handover operation, execution module sends neighboring BS information to algoritic module and obtains request, calculates
The current optimal Neighboring Cell List of method module output is given to execution module, and execution module is initiated blind handover and attempted according to Neighboring Cell List.
Fig. 6 is sequence handling process schematic diagram provided in an embodiment of the present invention, as shown in fig. 6, sequence processing step includes：
Principle of ordering：The cell of adjacent area abnormal state is weeded out first, and this adjacent area is added to black list (Black
List in).
Step S401：After starting sequence handling process, judge whether adjacent area state is normal, if normally, performing step
S402, otherwise perform step S409.
Step S402：Candidate target adjacent area is ranked up according to priority.
Step S403：Judge that same priority whether there is multiple adjacent areas, i.e. same priority whether there is 2 or more
Candidate target adjacent area, if so, then perform step S404, otherwise terminate flow.
Step S404：The adjacent area of same priority is sorted according to handover success rate.
Total degree that handover success rate can be switched by the website of statistics, detection based on adjacent area wireless performance index
Caused handoff failure number is calculated.
Step S405：Judge whether handover success rate identical adjacent area, i.e., it is same with the presence or absence of 2 or more have
The candidate target adjacent area of one priority, identical handover success rate, if so, then performing step S406, otherwise terminate flow.
Step S406：It is ranked up according to information on load.
Step S407：Judge whether information on load identical adjacent area, i.e., it is same with the presence or absence of 2 or more have
Priority, identical handover success rate, the candidate target adjacent area of same load information, if so, then performing step S408, otherwise terminate
Flow.
Step S408：It is ranked up according to switching times.
Step S409：Reject the cell of adjacent area abnormal state.
Step S410：Judge whether adjacent area state is abnormal, if abnormal, perform step S411, otherwise performs step
S401。
Step S411：The frequency of highest priority is chosen, and according to this frequency point information, attempts to redirect, and terminate to flow
Journey.
The embodiment of the present invention additionally provides a kind of blind handover system, including base station and terminal, wherein, the base station is used to lead to
Cross and adjacent area is detected, it is determined that the candidate target adjacent area for blind handover, and when blind handover is triggered, from candidate's mesh
Optimal adjacent area is selected in mark adjacent area and performs blind handover, is made the optimal adjacent area selected described in the terminal access, is additionally operable to do not having
During candidate target adjacent area for blind handover, the frequency of highest priority is selected, and according to the frequency of highest priority, perform blind
Redirect, the frequency for the highest priority that the terminal selects according to is searched for optimum subdistrict and is accessed.
That is, the base station determines that serving cell whether there is the candidate target adjacent area that can be used in blind handover, if
Candidate target adjacent area be present, then during blind handover, choose optimum subdistrict from candidate target adjacent area, and to the serving cell
Terminal issue the blind handover instruction comprising the optimum subdistrict information, the terminal includes the optimum subdistrict information according to
Blind handover control instruction, access the optimum subdistrict；If candidate target adjacent area is not present, during blind handover, to described
The terminal of serving cell sends the blind redirection instruction for containing up to priority frequency, and the terminal is according to containing up to priority frequently
The blind redirection instruction of point, the cell searched under the limit priority frequency, and access optimum subdistrict.
Embodiment 1
The present embodiment performs blind handover using high priority adjacent area as best candidate target adjacent area.
(1) in detection cycle, detection module detects adjacent area state, information on load and the performance based on adjacent area and referred to respectively
Target handoff failure number, and report algoritic module.
It is assumed that serving cell has 5 adjacent areas pair, in detection cycle, statistical result is as shown in table 1.
The adjacent area state table of table 1.
(2) data that algoritic module reports according to detection module, adjacent area state renewal and neighboring BS information sequence are carried out.
Step a1. carries out the first minor sort according to priority of adjacent domain, establishes preliminary order as shown in table 2.
The adjacent area state table that table 2. arranges according to priority orders
| The first order | 2,3 |
| The second level | 4 |
| The third level | 5 |
| The fourth stage | 1 |
Because the first order has multiple adjacent areas, not uniquely, need further to be ranked up the first order successively.
Step a2. is according to based on handoff failure ratio (i.e. handoff failure number divided by switching times) caused by the performance of adjacent area
It is ranked up.
Adjacent area to 2 handoff failure ratio：2/20=0.1；
Adjacent area to 3 handoff failure ratio：1/10=0.1；
It can be seen that adjacent area is identical with 3 handover success rate to 2.
Step a3. is ranked up according to neighboring cell load information.
Adjacent area to 2 information on load (30)=adjacent area to 3 information on load (30), i.e. adjacent area is believed 3 loads 2 and adjacent area
Manner of breathing is same.
Step a4. is last, is selected according to switching times, adjacent area to 2 switching times (20)>Switching of the adjacent area to 3
Number (10), i.e. adjacent area are better than adjacent area to 2 to 3.
With reference to above-mentioned steps a1 to step a4, final ranking results are adjacent area 2>Adjacent area 3>Adjacent area 4>Adjacent area 5>Adjacent area 1.
(3) blind handover is performed
During blind handover, execution module is to the optimal adjacent area of algoritic module request selecting, and algoritic module output adjacent area 2 is most
Excellent candidate target adjacent area, execution module initiate blind handover request to adjacent area 2.Or execution module asks to sort to algoritic module
Optimal Neighboring Cell List (i.e. candidate target Neighboring Cell List) afterwards, and adjacent area 2 is chosen as best candidate target neighbour from the list
Area performs blind handover.
Embodiment 2
The present embodiment performs blind handover using low priority adjacent area as best candidate target adjacent area.
(1) in detection cycle, detection module detects state, information on load and the performance based on adjacent area of adjacent area respectively
The handoff failure number of index, and report algoritic module.
It is assumed that serving cell has 5 adjacent areas pair, in detection cycle, statistical result is as shown in table 3.
The adjacent area state table of table 3.
(2) data that algoritic module reports according to detection module, adjacent area state renewal and neighboring BS information sequence are carried out.
Step b1. is added to adjacent area 1 in the black list in adjacent area according to adjacent area state.
Step b2. carries out the first minor sort according to priority of adjacent domain, establishes preliminary order as shown in table 4.
The adjacent area state table that table 4. arranges according to priority orders
| The first order | 2,3 |
| The second level | 4 |
| The third level | 5 |
Because the first order has multiple adjacent areas, not uniquely, it is therefore desirable to further the first order is ranked up.
Step b3. is according to based on handoff failure ratio (i.e. handoff failure number divided by switching times) caused by the performance of adjacent area
It is ranked up.
Adjacent area to 2 handoff failure ratio：1/10=0.1
Adjacent area to 3 handoff failure ratio：1/10=0.1
It can be seen that adjacent area is identical with 3 handover success rate to 2.
Step b4. is ranked up according to neighboring cell load information.
Adjacent area to 2 information on load (20)<To 3 information on load (30), i.e. adjacent area is better than adjacent area to 2 to 3 for adjacent area.
With reference to above-mentioned steps b1 to step b4, due to the abnormal state of adjacent area 1, it is put on the blacklist, rejects this minor sort, because
This final ranking results is adjacent area 2>Adjacent area 3>Adjacent area 4>Adjacent area 5.
(3) blind handover is performed
During blind handover, execution module asks optimal adjacent area to select to algoritic module, and algoritic module output adjacent area 2 is most
Excellent candidate target adjacent area, execution module initiate blind handover request to adjacent area 2.Or execution module asks to sort to algoritic module
Optimal Neighboring Cell List (i.e. candidate target Neighboring Cell List) afterwards, and adjacent area 2 is chosen as best candidate target neighbour from the list
Area performs blind handover.
Embodiment 3
The present embodiment selects limit priority frequency to do blind redirection exemplified by without candidate target adjacent area.
The adjacent area state table of table 5.
(1) in detection cycle, detection module detects state, information on load and the performance based on adjacent area of adjacent area respectively
The handoff failure number of index, and report algoritic module.
It is assumed that serving cell has 5 adjacent areas pair, in detection cycle, statistical result is as shown in table 5.
(2) data that algoritic module reports according to detection module, adjacent area state renewal and neighboring BS information sequence are carried out.
According to adjacent area state, adjacent area 1-5 is all added in the black list in adjacent area, candidate target Neighboring Cell List is set to sky.
(3) during blind handover, execution module asks optimal adjacent area to select to algoritic module, and algoritic module is adjudicated without optimal
Candidate target adjacent area, then the frequency of highest priority is selected to be redirected to execution module, instruction.Execution module is according to calculation
The court verdict of method module, walk to redirect flow, carry the frequency of highest priority to terminal.
In summary, embodiments of the invention have following technique effect：
1st, the embodiment of the present invention can will be unable to obtain adjacent area state or adjacent area shape when performing the selection of blind handover adjacent area
The abnormal cell of state is included in the blacklist of adjacent area, does not do candidate adjacent selection, and optimal candidate target cells can be selected to enter
Row handover operation, avoid switching to the abnormal cell cell that either performance quality is too poor or information on load is too high, improve switching
Success rate, lifting user perceive.
2nd, the blind handover process of the embodiment of the present invention, avoids randomness and blindness, can reasonably utilize currently
Resource, most superior resources are used for the place that needs most, improve the reasonability and utilization ratio of the utilization of resources.
3rd, the embodiment of the present invention selects limit priority frequency in the case of no suitable candidate target adjacent area, performs
Redirect, the influence that will go offline is preferably minimized.
Although the present invention is described in detail above, the invention is not restricted to this, those skilled in the art of the present technique
Various modifications can be carried out according to the principle of the present invention.Therefore, all modifications made according to the principle of the invention, all should be understood to
Fall into protection scope of the present invention.
Claims (14)
1. a kind of blind switching method, including：
By being detected to adjacent area, it is determined that the candidate target adjacent area for blind handover；
When blind handover is triggered, optimal adjacent area is selected from the candidate target adjacent area and performs blind handover.
2. it is according to the method for claim 1, described by being detected to adjacent area, it is determined that candidate's mesh for blind handover
Mark adjacent area includes：
By detect adjacent area state whether exception and adjacent area service quality, obtain adjacent area status information and adjacent area service quality letter
Breath；
According to the adjacent area status information, it is determined that the candidate target adjacent area for blind handover.
3. it is according to the method for claim 2, described according to the adjacent area status information, it is determined that the candidate for blind handover
Target adjacent area includes：
If the adjacent area status information is the information of adjacent area abnormal state, the abnormal adjacent area is added to blacklist, and will
Adjacent area state normally other adjacent areas as candidate target adjacent area.
4. according to the method in claim 2 or 3, the adjacent area service quality includes the switching mistake based on adjacent area performance indications
Number and information on load are lost, it is described by being detected to adjacent area, it is determined that the candidate target adjacent area for blind handover is further
Including：
According to priority of adjacent domain, the candidate target adjacent area is ranked up, obtains the candidate's mesh arranged according to priority orders
Mark adjacent area；
If priority identical adjacent area be present in the candidate target adjacent area according to priority orders arrangement, according to the neighbour
Area's quality of service information is ranked up to the priority identical adjacent area, is obtained according to the tactic candidate's mesh of best candidate
Mark adjacent area.
5. according to the method described in claim 1-3 any one, further comprise：
If by being detected to adjacent area, it is determined that without the candidate target adjacent area for blind handover, then highest priority is selected
Frequency, and according to the frequency of highest priority, perform blind redirection.
6. a kind of blind handover device, including：
Candidate target adjacent area selecting module, for by being detected to adjacent area, it is determined that the candidate target adjacent area for blind handover；
Execution module, blind handover is performed for when blind handover is triggered, selecting optimal adjacent area from the candidate target adjacent area.
7. device according to claim 6, whether candidate target adjacent area selecting module is different by detecting adjacent area state
Often and adjacent area service quality, adjacent area status information and adjacent area quality of service information are obtained, and according to the adjacent area status information,
It is determined that the candidate target adjacent area for blind handover.
8. device according to claim 7, candidate target adjacent area selecting module is adjacent in the adjacent area status information
During the abnormal information of zone state, the abnormal adjacent area is added to blacklist, and using adjacent area state normally other adjacent areas as
Candidate target adjacent area.
9. the device according to claim 7 or 8, the adjacent area service quality includes the switching based on adjacent area performance indications and lost
Number and information on load are lost, candidate target adjacent area selecting module is entered according to priority of adjacent domain to the candidate target adjacent area
Row sequence, obtains the candidate target adjacent area arranged according to priority orders, if the candidate's mesh arranged according to priority orders
There is priority identical adjacent area in mark, then in adjacent area according to the adjacent area quality of service information to the priority identical adjacent area
It is ranked up, obtains according to the tactic candidate target adjacent area of best candidate.
10. according to the device described in claim 6-8 any one, if by being detected to adjacent area, it is determined that without for blind
The candidate target adjacent area of switching, then candidate target adjacent area selecting module select the frequency of highest priority, held for described
Row module performs blind redirection according to the frequency of highest priority.
11. a kind of base station, including baseband processing unit, Remote Radio Unit and antenna, wherein,
The baseband processing unit, for by being detected to adjacent area, it is determined that the candidate target adjacent area for blind handover, and work as
When blind handover is triggered, optimal adjacent area is selected from the candidate target adjacent area and performs blind handover.
12. base station according to claim 11, the baseband processing unit is additionally operable to be not used for the candidate of blind handover
During target adjacent area, the frequency of highest priority is selected, and according to the frequency of highest priority, perform blind redirection.
13. a kind of blind handover system, including base station and terminal, wherein,
The base station, for by being detected to adjacent area, it is determined that the candidate target adjacent area for blind handover, and work as blind handover quilt
During triggering, optimal adjacent area is selected from the candidate target adjacent area and performs blind handover, make to select most described in the terminal access
Excellent adjacent area.
14. system according to claim 13, the base station is additionally operable to be not used for the candidate target adjacent area of blind handover
When, the frequency of highest priority is selected, and according to the frequency of highest priority, perform blind redirection, make the terminal according to institute
State the frequency search optimum subdistrict for the highest priority selected and access.
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| CN111031582A (en) * | 2019-12-12 | 2020-04-17 | 紫光展锐(重庆)科技有限公司 | Adjacent cell detection method and device, terminal equipment and storage medium |
| CN111698748A (en) * | 2020-06-02 | 2020-09-22 | 上海闻泰信息技术有限公司 | Network blind switching method, device, base station equipment and storage medium |
| CN112203329A (en) * | 2019-07-08 | 2021-01-08 | 中国移动通信集团浙江有限公司 | Load balancing-based neighbor cell selection method and device |
| CN113727402A (en) * | 2021-09-28 | 2021-11-30 | 维沃移动通信有限公司 | Abnormal cell processing method and device |
| CN113993186A (en) * | 2021-10-14 | 2022-01-28 | 紫光展锐(重庆)科技有限公司 | Access method, communication device, chip and module equipment thereof |
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| CN113993186A (en) * | 2021-10-14 | 2022-01-28 | 紫光展锐(重庆)科技有限公司 | Access method, communication device, chip and module equipment thereof |
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