CN103906102B - Of short duration resident inspection optimization method and system - Google Patents
Of short duration resident inspection optimization method and system Download PDFInfo
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- CN103906102B CN103906102B CN201210585047.XA CN201210585047A CN103906102B CN 103906102 B CN103906102 B CN 103906102B CN 201210585047 A CN201210585047 A CN 201210585047A CN 103906102 B CN103906102 B CN 103906102B
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Abstract
The present invention discloses a kind of of short duration resident inspection optimization method and system, for optimizing signaling waste and the decline of user experience caused by mobility unreasonable in wireless network and power parameter configuration.Wherein in of short duration resident inspection optimization method, first community base station is when determining user terminal being switched to second community, residence time of the counting user terminal in first community, and residence time is added in the historical information of user terminal, second community base station is according to the historical information of user terminal, it is unnecessary of short duration resident to judge whether user terminal has occurred in first community, if user terminal has occurred unnecessary of short duration resident in first community, then second community base station sends of short duration resident report to optimization server, the of short duration resident report of optimization server by utilizing optimizes processing to network system.Thus it can be recognized accurately of short duration resident, while avoid generating unnecessary report, be advantageously implemented the network optimization.
Description
Technical field
The present invention relates to the communications field, more particularly to a kind of of short duration resident inspection optimization method and system.
Background technology
In 3GPP（The3rd Generation Partnership Project, third generation partner program）R11's
In research on standard, the user terminal discussed between base station is of short duration resident（Short Stay）Detection method the problem of.According to
Of short duration resident definition：It is of short duration it is resident be to be switched to another after cell A is switched to cell B and resides a finite time
An outer cell C, as shown in Figure 1.The of short duration resident signaling overheads that can increase network and the unnecessary forward of data packet, and can
It can lead to the decline of system performance and end-user experience.Therefore how to reduce unnecessary of short duration resident to optimize movement
Property is an important subject.
In current handover mechanism, when user terminal is to be switched arrives other cells, cell-of-origin A can at user end
Hold the relevant information being resident in cell-of-origin A（The size of cell-of-origin, the ECGI and residence time of source base station）It is added to user's end
In the historical information at end, and notify to give Target cell B.Wherein for pingpang handoff, base station can be by checking that user is whole
The historical information at end judges, but for of short duration resident scene, since cell A possibly can not obtain user terminal small
The relevant information switched in area B to which cell A is not aware that of short duration resident situation occurs in cell B, therefore only checks terminal
Historical information cannot be adapted in the detection and optimization of of short duration resident scene.
A kind of detection scheme is proposed in the prior art at present.The program thinks that first cell of triggering switching is being sent out
It has given birth to of short duration be resident to need to be notified later, the trigger condition of adjustment switching is then determined the need for according to this message.This
A message is needed comprising residence time, switch reasons, QoS（Quality of Service, service quality）Information etc..The program
Particular content it is as follows：
1）When a user terminal is switched to a cell, the minimum residence time of the user terminal is estimated in base station first.
2）If the ratio expected time that follow-up switching occurs is early, base station needs to increase a flag bit in historical information
Indicate that the user terminal residence time is shorter.
3）If residence time is long, however, it was found that one or more cell is resident in the historical information of user terminal
Time is shorter, then this information is needed to be sent to the shorter cell of recent residence time.
The program has the drawback that：
The first, it is based on existing LTE（Long Term Evolution, long term evolution）Framework, base station side lack user's end
The speed at end, the information such as direction of motion, the minimum residence time estimated can have prodigious deviation, therefore can cause follow-up
A large amount of erroneous judgements.
The second, it can not determine whether of short duration be resident is necessary switching, such as the scene in Fig. 2, in cell a,
Cell B is mainly used to make up covering cavity, thus this switching cause it is of short duration it is resident be that it is necessary to and be based on said program
In method, cell B can not know user terminal whether be because cover it is bad caused by switch.
The appearance of third, entire of short duration resident phenomenon may be the handoff parameter and wireless resource management due to cell A
Strategy（Such as the blind handover during load balancing）The problem of result in unnecessary switching, therefore only message in said program
It is sent to the cell that of short duration resident phenomenon occurs, and problem base station can not obtain above- mentioned information, it is subsequent to carry out
Optimization.
It also proposed a kind of scheme of the of short duration presence information of interactive user terminal between base station in the prior art, the program
Main thought is by of short duration resident base station occurs（Cell B）It sends report notification and triggers of short duration resident handover source base station（It is small
Area A）.The content of the program is：
[1] switching types（Handover Type）：Intra-LTE, LTE to UTRAN（UMTS Terrestrial
Radio Access Network, UMTS Terrestrial radio access network）, LTE to GERAN（GSM EDGE Radio Access
Network, GSM EDGE wireless access networks）.
[2] cell-of-origins（Cell A）Mark.
[3] middle cells（Cell B）Mark.
[4] Target cell of switchings（Cell C）Mark：If it is pingpang handoff, then the mark of the Target cell switched
Equal to the mark of cell-of-origin.
[5] the of short duration resident duration：First switching was accomplished between the time between second switching initialization
Every.
[6] handover trigger events：The event type of second switching.
[7] measurement events result：User terminal measurement result in second switching.
The disadvantages of this solution is：
The first, problem detection node is placed on middle cell, then of short duration residence time calculating may it is wrong, when terminal from
Cell B be switched to during cell C may handover failure, be either reconstructed into cell C or cell B, and this phenomenon
It is just instead of not of short duration to reside, to be grouped into the too late detection switch/switched too early and optimization process.
The second, the trigger event switched：The trigger event that switching is carried in the program, since switching is by base station lateral root
It is carried out according to the auxiliary of handover trigger event, simple handover trigger event cannot be equal to the handoff threshold of cell B settings, therefore
Handover trigger event is to optimizing and detecting without too big help.
Third, the mechanism may lead to a large amount of wastes of signaling, such as pingpang handoff, and switching feature is small
It is toggled between area A and cell B more than 3 times or more, then cell B can send the report to cell A, same cell A
Cell B can be sent the report to, with multiple switching of the terminal between cell A and B, is just resulted in so many unnecessary
The generation of report.
Invention content
The technical problem to be solved in the present invention is to provide a kind of of short duration resident inspection optimization method and systems.It is small by first
Relevant information of the user terminal twice in adjacent handoff procedure is collected in area base station, thus second community base station judges whether to have occurred
It is unnecessary of short duration resident, if having occurred unnecessary of short duration resident, generates of short duration resident report and notify optimization server,
Optimization server completes optimization processing according to the of short duration resident report being collected into.Thus can be recognized accurately it is of short duration resident, simultaneously
It avoids generating unnecessary report, is advantageously implemented the network optimization.
According to an aspect of the present invention, a kind of of short duration resident inspection optimization method is provided, including：
When determining user terminal being switched to second community, counting user terminal is in first community for first community base station
Residence time, and residence time is added in the historical information of user terminal, wherein residence time is user terminal from
It determines user terminal being switched between the time between second community after three cells access first community, to first community base station
Every；
Second community base station judges whether user terminal has occurred not in first community according to the historical information of user terminal
It is necessary of short duration resident；
If user terminal has occurred unnecessary of short duration resident in first community, second community base station is to optimization server
Send of short duration resident report；
The of short duration resident report of optimization server by utilizing optimizes processing to network system.
According to another aspect of the present invention, a kind of of short duration resident inspection optimization system is provided, including：
First community base station, for when determining user terminal being switched to second community, counting user terminal to be first
Residence time in cell, and residence time is added in the historical information of user terminal, wherein residence time is user's end
Hold from third cell access first community after, determine to first community base station user terminal being switched to second community when
Between be spaced；
Second community base station judges whether user terminal is sent out in first community for the historical information according to user terminal
It has given birth to unnecessary of short duration resident, if user terminal has occurred unnecessary of short duration resident in first community, has been serviced to optimization
Device sends of short duration resident report；
Optimize server, for optimizing processing to network system using of short duration resident report.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without having to pay creative labor, may be used also for those of ordinary skill in the art
With obtain other attached drawings according to these attached drawings.
Fig. 1 is the first network schematic diagram for describing of short duration resident phenomenon.
Fig. 2 is the second network diagram for describing of short duration resident phenomenon.
Fig. 3 is the schematic diagram of the of short duration resident inspection optimization method one embodiment of the present invention.
Fig. 4 is that the present invention judges whether that the schematic diagram of unnecessary of short duration resident one embodiment occurs.
Fig. 5 is the schematic diagram that inventive network system optimization handles one embodiment.
Fig. 6 is the schematic diagram of the of short duration resident inspection optimization system one embodiment of the present invention.
Fig. 7 is the schematic diagram of the of short duration resident another embodiment of inspection optimization system of the present invention.
Fig. 8 is the schematic diagram of of short duration resident phenomenon inspection optimization in Intra-LTE scenes of the present invention.
Fig. 9 is the schematic diagram of of short duration resident phenomenon inspection optimization in Inter-RAT scenes of the present invention.
Figure 10 is the schematic diagram of of short duration resident phenomenon inspection optimization in isomery scene of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Below
Description only actually at least one exemplary embodiment is illustrative, is never used as to the present invention and its application or makes
Any restrictions.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, shall fall within the protection scope of the present invention.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments
It is not limited the scope of the invention up to formula and numerical value.
Simultaneously, it should be appreciated that for ease of description, the size of attached various pieces shown in the drawings is not according to reality
Proportionate relationship draw.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as authorizing part of specification.
In shown here and discussion all examples, any occurrence should be construed as merely illustrative, without
It is as limitation.Therefore, the other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it need not be further discussed in subsequent attached drawing in a attached drawing.
Fig. 3 is the schematic diagram of the of short duration resident inspection optimization method one embodiment of the present invention.As shown in figure 3, the present embodiment
Of short duration resident inspection optimization method and step it is as follows：
Step 301, when determining user terminal being switched to second community, counting user terminal is for first community base station
Residence time in one cell, and residence time is added in the historical information of user terminal, wherein residence time is user
Terminal determines user terminal being switched to second community after third cell access first community, to first community base station
Time interval.
Step 302, second community base station is according to the historical information of user terminal, judge user terminal first community whether
It has occurred unnecessary of short duration resident.
Step 303, if user terminal has occurred unnecessary of short duration resident in first community, second community base station is to excellent
Change server and sends of short duration resident report.
Step 304, the of short duration resident report of optimization server by utilizing optimizes processing to network system.
Based on the of short duration resident inspection optimization method that the above embodiment of the present invention provides, first community base station is determining to use
When family terminal is switched to second community, residence time of the counting user terminal in first community, and residence time is added to
In the historical information of user terminal, second community base station judges that user terminal is small first according to the historical information of user terminal
It is unnecessary of short duration resident whether area has occurred, if user terminal had occurred in first community it is unnecessary of short duration resident, the
Two cell base stations send of short duration resident report to optimization server, the of short duration resident report of optimization server by utilizing to network system into
Row optimization processing.Thus it can be recognized accurately of short duration resident, while avoid generating unnecessary report, it is excellent to be advantageously implemented network
Change.
Preferably, optimization server is OAM（Operation And Maintenance, Operation and Maintenance）Server.Also may be used
To be the last in the cell that the user terminal is resident before this cell from being found out in the historical information of the user terminal
There is not the base station belonging to the cell of of short duration resident phenomenon.
Preferably, it is resident threshold value to be configured by OAM, the value is related to several factors（Such as the size of base station, the type of switching
Deng）, can be arranged according to engineering experience and emulation.
Preferably, user terminal in the presence information of this cell other than comprising the related content defined in existing standard,
Also include following but is not limited to following content：
[1] failed list of carryings（The mark and failure cause of failure carrying, these carryings are small due to problem collection
Area is generated because certain reason can not receive）.
[2] terminals collect the measurement report reported in cell in problem.
Fig. 4 is that the present invention judges whether that the schematic diagram of unnecessary of short duration resident one embodiment occurs.On as shown in figure 4,
The method and step for stating step 302 is as follows：
Step 401, second community base station utilizes user terminal after the switching request for receiving the transmission of first community base station
Historical information, judge residence time whether be less than scheduled residence time threshold value.
Step 402, if judging, residence time is less than scheduled residence time threshold value, and use is further detected in second community base station
Whether the movement speed of family terminal is less than threshold speed.
Step 403, if judging, the movement speed of user terminal is less than threshold speed, and second community base station further judges to use
Family terminal in first community it is resident whether it is necessary to.
Step 404, if second community base station judges user terminal, being resident in first community is not necessarily to, and second is small
Area base station executes the step of sending of short duration resident report to optimization server.
Preferably, above-mentioned second community base station further includes after receiving switching request：
Second community base station postpones scheduled time interval.
Then the historical information using user terminal is executed, judges whether residence time is less than scheduled residence time threshold value
The step of.
Wherein, the effect of this time interval is mainly used to prevent user after receiving switching command to successful switch one
Radio Link Failure occurs in a very short time, if Radio Link Failure has occurred within this time, the problem is not
Belong to of short duration resident research range, and belong to the determination range of too late switching, in the SON of R9/R10（Self Organizing
Network, self-organizing network）Has correlation resolution policy in standard.
Preferably, second community base station further judge user terminal in first community it is resident whether it is necessary to step
Suddenly include：
Second community base station further judges whether the signal strength of first community, second community and third cell is all higher than
The signal strength of signal strength threshold, wherein first community, second community and third cell is included in the history letter of user terminal
In breath.
If the signal strength of first community, second community and third cell is all higher than signal strength threshold, second community
Base station judges that user terminal being resident in first community is not necessarily to.
Preferably, judge it is of short duration it is resident whether it is necessary to basis for estimation can also include following content（But it is not limited to
This）：
1）Whether its carrying is affected after user terminal is switched to of short duration persistent district.
2）The covering purpose of the of short duration persistent district of user terminal.
Wherein according to 1）, user terminal in handoff procedure for some reason（Cell do not support CS business or other
The business of type）Resulting in carrying can not be accepted, then the secondary switching may be to be not necessarily to.
According to 2）, primarily directed to the scene in Fig. 2, if the purpose of the of short duration resident cell deployment of terminal is to understand
The covering cavity for certainly disposing area, then the secondary switching may be necessary, otherwise may result in the appearance of call drop.
Necessary of short duration resident is belonged to for judgement, second community does not do subsequent processing, and of short duration is stayed for non-essential
It stays, it is therefore desirable to send of short duration resident report to optimization server, the content of report can be as described below（But not limited to this）：
[1] switching types（Handover Type）
[2] cell-of-origins（Third cell）Mark
[3] switch reasons
[4] the of short duration persistent districts（First community）Mark
[5] detects cell（Second community）Mark
[6] carries failed list
[7] report times point
Optimize server according to multiple report information, classify according to the mark of switch reasons and of short duration persistent district,
If the same class switching times ratio that the number that problem occurs in a period of time accounts for is more than trigger threshold, then it is assumed that need
Execute optimization operation.Wherein the value of trigger threshold can be configured by emulation or engineering experience value by operator, optimize server
It can either the mobility of of short duration resident cell or covering parameter be completed to optimize by adjusting the handoff parameter of cell-of-origin
Process.
Fig. 5 is the schematic diagram that inventive network system optimization handles one embodiment.As shown in figure 5, being taken in above-mentioned optimization
In the step of business device optimizes processing using of short duration resident report to network system, further comprise：
Step 501, the of short duration resident report number that optimization server statistics receive within the predetermined time.
Step 502, optimization server is by third cell base station, and statistics is within the predetermined time from third cell
It is switched to total switching times of first community.
Step 503, whether optimization server judges the ratio of of short duration resident report number and total switching times more than scheduled
Decision threshold.
Step 504, if the ratio of of short duration resident switching times and total switching times is more than scheduled decision threshold, optimization service
Device optimizes processing to systematic parameter.
Preferably, the step of above-mentioned optimization server optimizes processing to systematic parameter include：
Optimization server judges whether the covering purpose of first community is to make up covering cavity；
If the purpose of covering of first community is to make up covering cavity, optimizing server reduces the base station of first community
Transmission power.
Due to first community covering the purpose of be to make up covering cavity, such as the situation of Fig. 2, therefore such switching
It is necessary.In order to avoid of short duration resident generation, can be realized by reducing the base station transmitting power of first community.
Preferably, if the covering purpose of first community is not configured to make up covering cavity, optimize server instruction third
Cell base station improves the switching individual character offset parameter relative to first community；Or instruction third cell base station is not by first community
As switching target small area.
Due to first community covering purpose and be to make up covering cavity, such as the situation of Fig. 1, instruction the can be passed through
Three cell base stations improve the switching individual character offset parameter relative to first community to realize, preferred increase rate is 2dB.Or
First community is not regard it as switching target small area by instruction third cell base station to realize.
Fig. 6 is the schematic diagram of the of short duration resident inspection optimization system one embodiment of the present invention.As shown in figure 5, of short duration resident
Inspection optimization system includes first community base station 601, second community base station 602 and optimization server 603.Wherein：
First community base station 601, for when determining user terminal being switched to second community, counting user terminal to be the
Residence time in one cell, and residence time is added in the historical information of user terminal, wherein residence time is user
Terminal determines user terminal being switched to second community after third cell access first community, to first community base station
Time interval.
Second community base station 602, for according to the historical information of user terminal, judge user terminal first community whether
It has occurred unnecessary of short duration resident, if user terminal has occurred unnecessary of short duration resident in first community, is taken to optimization
Business device 603 sends of short duration resident report.
Optimize server 603, for optimizing processing to network system using of short duration resident report.
Based on the of short duration resident inspection optimization system that the above embodiment of the present invention provides, first community base station is determining to use
When family terminal is switched to second community, residence time of the counting user terminal in first community, and residence time is added to
In the historical information of user terminal, second community base station judges that user terminal is small first according to the historical information of user terminal
It is unnecessary of short duration resident whether area has occurred, if user terminal had occurred in first community it is unnecessary of short duration resident, the
Two cell base stations send of short duration resident report to optimization server, the of short duration resident report of optimization server by utilizing to network system into
Row optimization processing.Thus it can be recognized accurately of short duration resident, while avoid generating unnecessary report, it is excellent to be advantageously implemented network
Change.
Preferably, second community base station 602 is additionally operable to after the switching request for receiving the transmission of first community base station 601,
Using the historical information of user terminal, judge whether residence time is less than scheduled residence time threshold value；If judging residence time
Less than scheduled residence time threshold value, whether the movement speed for further detecting user terminal is less than threshold speed；If judging to use
The movement speed of family terminal be less than threshold speed, further judge user terminal in first community it is resident whether it is necessary to；
If judging, user terminal being resident in first community is not necessarily to, and executes to optimization server 603 and sends of short duration resident report
The operation of announcement.
Preferably, second community base station 602 is additionally operable to after the switching request for receiving the transmission of first community base station 601,
Postpone scheduled time interval, then execute the historical information using user terminal, it is scheduled to judge whether residence time is less than
The operation of residence time threshold value.
Preferably, second community base station 602 is additionally operable to judge first community, the signal strength of second community and third cell
Whether signal strength threshold is all higher than, and the signal strength of wherein first community, second community and third cell is included in user's end
In the historical information at end；If the signal strength of first community, second community and third cell is all higher than signal strength threshold, sentence
Disconnected user terminal being resident in first community is not necessarily to.
Fig. 7 is the schematic diagram of the of short duration resident inspection optimization system one embodiment of the present invention.With embodiment illustrated in fig. 6 phase
Than further including third cell base station 701 in the embodiment shown in fig. 7.Wherein：
Optimization server 603 is additionally operable to count the of short duration resident report number received within the predetermined time；Pass through
Third cell base station 701, statistics are switched to total switching times of first community within the predetermined time from third cell；
Judge whether the ratio of of short duration resident report number and total switching times is more than scheduled decision threshold；If of short duration resident switching times
And the ratio of total switching times is more than scheduled first decision threshold and/or total switching times are more than the second decision threshold, right
Systematic parameter optimizes processing.
Third cell base station 701 is switched to first community for counting within the scope of the predetermined time from third cell
Total switching times, and report statistical result to optimization server.
Preferably, optimization server 603 is additionally operable to judge whether the covering purpose of first community is empty in order to make up covering
Hole；If the purpose of covering of first community is to make up covering cavity, reduce the base station transmitting power of first community.
Preferably, optimization server 603 is additionally operable to when the covering purpose of first community is not configured to make up covering cavity,
Indicate that third cell base station 701 improves the switching individual character offset parameter relative to first community；Or instruction third cell base station
701 using first community as switching target small area.
With three specific embodiments, present invention is described below.
Fig. 8 is the schematic diagram of of short duration resident phenomenon inspection optimization in Intra-LTE scenes of the present invention.As shown in figure 8, cell
Adjacent area each other between A, B, C, and be all LTE cells.User terminal triggers cutting for cell B in the edge of cell A, cell A
It changes, has been switched to cell C again in a very short time later.There is X2 interface in cell A, and user is whole between B and C
End has GPS abilities.
Step 1：It is wireless reason that cell A, which triggers user terminal from this cell to the switching of cell B, switch reasons,：
“Handover Desirable for Radio Reasons”。
Step 2：For cell B after receiving cell A about the switching request of user terminal, the acceptance algorithm in cell B is true
The carrying of the fixed user terminal can all be received, and the switch reasons of cell B record user terminals.When user terminal with
After machine is linked into cell B, the time point of cell B record user terminal access cells B.1.5 after user terminal is switched to cell B
Second, the sides cell B receive the measurement report of user terminal, and user terminal is determined to be switched to cell C, cell according to measurement report
B has found that user terminal only has 1.5 seconds from access cell to the time interval triggering switching, is less than intra-LTE at a slow speed eventually
It holds threshold value thresholding 5 seconds, therefore in the history information of user terminal in the presence information of cell A, increases switch reasons：
“Handover Desirable for Radio Reasons”.Cell B's is resident in the history information of user terminal
In information, the measurement report of user terminal is increased.
Step 3：Cell-of-origin switching request acknowledgement message the latter fixed time interval 2 of the cell C in switching to be replied
Second starts to judge, it is found that residence time only has 1.5 seconds, be less than terminal thresholding 5 seconds at a slow speed intra-LTE.Then cell needs to obtain
The movement speed of user terminal, cell C recognize that the user terminal supports GPS functions according to the ability of user terminal, then utilize
User terminal information interactive processes obtain the movement speed of user terminal, and the movement speed of user terminal is 3Km/
h.Therefore the user terminal is the terminal of a low speed, and in history message in the measurement report of user terminal, cell A, B, C's
Signal strength is all higher than thresholding, then judges that the user terminal belongs to unnecessary of short duration resident in the resident of cell B.Cell C is logical
The historical information for crossing user terminal finds that the user terminal is to be switched to cell B from cell A, and the residence time of cell A is high
In threshold value, then cell C reports that the user terminal is of short duration resident by X2 interface to cell A.Content in of short duration resident report
It is as follows：
[1] switching types（Handover Type）：Intra-LTE switches
[2] mark of the cell-of-origins：The ECGI of cell A
[3] switch reasons：Handover Desirable for Radio Reasons
[4] mark of the of short duration persistent districts：The ECGI of cell B
[5] detects the mark of cell：The ECGI of cell C
[6] report times point
Step 4：Cell A receives the of short duration resident report of cell C, stores this report.The one of the configuration for reaching system
The reason of a moment handles the of short duration resident report received, finds to receive 40 of short duration resident reports altogether, switching is all
It is Handover Desirable for Radio Reasons, and the Target cell switched is all cell B.In this period
It is interior, the RRM of cell A（Radio Resource Management, wireless resource management）Module is counted on to cell C switchings time
Number shares 80 times, therefore the of short duration switching proportion generated is 50%, has been more than pre-determined threshold 5%, it is therefore desirable to carry out relevant tune
It is whole.Cell A improves oneself offset of switching individual character OCN, size 2dB with cell B.
Fig. 9 is Inter-RAT of the present invention（Radio Access Technology, wireless access technology）It is of short duration in scene
The schematic diagram of resident phenomenon inspection optimization.As shown in figure 9, WCDMA each other between cell A, C（Wideband Code
Division Multiple Access, wideband code division multiple access）Cell and adhere to different RNC separately（Radio Network
Controller, radio network controller）, and there is no Iur interfaces between RNC, cell B is LTE cells in addition.User terminal exists
The edge of cell A, cell A are very short at one later because loading the higher switching for triggering user terminal in advance to cell B
Time has been switched to cell C again, and user terminal is a common R9 terminal for not supporting GPS abilities.
Step 1：It is wireless reason that cell A, which triggers user terminal from this cell to the switching of cell B, switch reasons,：
“Resource Optimisation Handover”。
Step 2：For cell B after receiving cell A about the switching request of user terminal, the acceptance algorithm in cell B is true
The CS carryings of the fixed user terminal are rejected, and the switch reasons of cell B record user terminals.When user terminal random access
To after cell B, the time point of cell B record user terminal access cells B.5 seconds after user terminal is switched to cell B, cell B
Side receives the measurement report of user terminal, is determined user terminal to be switched to cell C according to measurement report, cell B has found to use
Time interval family terminal switches from access cell to triggering only has 5 seconds, is less than intra-LTE terminal threshold value thresholdings at a slow speed
12 seconds, therefore in the history information of user terminal in the presence information of cell A, increase switch reasons：“Resource
Optimisation Handover”.In the history information of user terminal in the presence information of cell B, user is increased
The measurement report of terminal and the carrying information being rejected.
Step 3：Cell-of-origin switching request acknowledgement message the latter regular times of the RNC of cell C in switching to be replied
Interval starts to judge, it is found that residence time only has 5 seconds, be less than terminal thresholding 12 seconds at a slow speed intra-LTE for 4 seconds.Then cell needs
The movement speed of user terminal is obtained, cell C recognizes its ability for not supporting GPS according to the ability of user terminal, therefore logical
It crosses base station and estimates that the Doppler frequency-shift for receiving signal estimates that the user terminal may be a low velocity user.Due to the user
Terminal is that the signal strength of cell A, B, C in the measurement report of user terminal in the terminal of a low speed and history message are all higher than
Thresholding then judges that the user terminal belongs to unnecessary of short duration resident in the resident of cell B.Cell C is gone through by user terminal
History information finds that the user terminal is to be switched to cell B from cell A, and the residence time of cell A is higher than threshold value, then small
RNC belonging to area C is sent to this report in Operation and Maintenance OAM by Itf-N interfaces.Content is such as in of short duration resident report
Under：
[1] switching types（Handover Type）：UTRAN->LTE
[2] mark of the cell-of-origins：The ECGI of cell A
[3] switch reasons：“Resource Optimisation Handover
[4] mark of the of short duration persistent districts：The ECGI of cell B
[5] detects the mark of cell：The ECGI of cell C
[6] report times point
Step 4：OAM receives the of short duration resident report of cell C, stores this report.At one of the configuration for reaching system
Moment handles the of short duration resident report received, it is found that the reason of receiving 15 of short duration resident reports altogether, switching all is
Resource Optimisation Handover, and the Target cell switched is all cell B.Within this period, cell A
RRM modules be reported to OAM to be shared 30 times to cell B switching times, therefore generate of short duration switching proportion be 50%, be more than
Pre-determined threshold 5%, it is therefore desirable to carry out relevant adjustment.Congestion avoidance algorithm in OAM settings cell A forbid using cell B as
The Target cell of load balancing.
Figure 10 is the schematic diagram of of short duration resident phenomenon inspection optimization in isomery scene of the present invention.As shown in Figure 10, cell A, B
Between adjacent area and be all LTE cells each other, wherein cell A is macro（Macro）Cell, and cell B is micro-（Pico）Cell.User
Terminal is moved on a highway in cell coverage area, since the power setting of PICO cells is improper, is caused
Cover phenomenon, user terminal has switched cell B at the edge of cell B by cell A, later a very short time again by
It has been switched to cell A.User terminal has GPS abilities.
Step 1：It is wireless reason that cell A, which triggers user terminal from this cell to the switching of cell B, switch reasons,：
“Handover Desirable for Radio Reasons”。
Step 2：For cell B after receiving cell A about the switching request of user terminal, the acceptance algorithm in cell B is true
The carrying of the fixed user terminal can all be received, and the switch reasons of cell B record user terminals.When user terminal with
After machine is linked into cell B, the time point of cell B record user terminal access cells B.1.5 after user terminal is switched to cell B
Second, the sides cell B receive the measurement report of user terminal, and user terminal is determined to be switched to cell A, cell according to measurement report
B has found that user terminal only has 1.5 seconds from access cell to the time interval triggering switching, is less than intra-LTE at a slow speed eventually
It holds threshold value thresholding 5 seconds, therefore in the history information of user terminal in the presence information of cell A, increases switch reasons：
“Handover Desirable for Radio Reasons”.Cell B's is resident in the history information of user terminal
In information, the measurement report of user terminal is increased.
Step 3：Cell-of-origin switching request acknowledgement message the latter fixed time interval 2 of the cell A in switching to be replied
Second starts to judge, it is found that residence time only has 1.5 seconds, be less than terminal thresholding 5 seconds at a slow speed intra-LTE.Then cell needs to obtain
The movement speed of user terminal, cell A support the MDT functions of R10 according to the ability discovery of the user terminal user terminal, then sharp
The movement speed of user terminal is obtained with user terminal information processes, the movement speed of user terminal is 60Km/h.
Therefore the user terminal is the terminal of a middling speed, and cell A has found that its residence time is still below middling speed terminal threshold value.In addition history
In message in the measurement report of user terminal, the signal strength of cell A, B are all higher than thresholding, then judge the user terminal in cell
The resident of B belongs to unnecessary of short duration resident.Cell A has found the switching of the user terminal by the historical information of user terminal
Sequence is to be switched to B from A to switch back to A again, then cell A reports that the user terminal is of short duration resident by Itf-N interfaces to OAM.
Content is as follows in of short duration resident report：
[1] switching types（Handover Type）：Intra-LTE switches
[2] mark of the cell-of-origins：The ECGI of cell A
[3] switch reasons：Handover Desirable for Radio Reasons
[4] mark of the of short duration persistent districts：The ECGI of cell B
[5] detects the mark of cell：The ECGI of cell A
[6] report times point
Step 4：OAM receives the of short duration resident report of cell A, stores this report.At one of the configuration for reaching system
Moment handles the of short duration resident report received, it is found that the reason of receiving 30 of short duration resident reports altogether, switching all is
Handover Desirable for Radio Reasons, and the Target cell switched is all cell B.In this period
Interior, the RRM modules of cell A are counted on to be shared 40 times to cell C switching times, therefore the of short duration switching proportion generated is 75%, is surpassed
Pre-determined threshold 5% is crossed, since cell B is a PICO cell, the indicating cells OAM reduce transmission power.
By applying the present invention, following advantageous effect can be obtained：
This patent proposes a kind of of short duration resident inspection optimization scheme, and compared with the existing technology, this programme can better area
Now of short duration resident reason is separated, and detects whether the of short duration resident phenomenon belongs to inessential, optimization server is according to of short duration
Resident report is completed to optimize and revise.This patent changes smaller, the equipment for facilitating equipment manufacturers to existing protocol process simultaneously
Realize the implementation with operator, for standardization angle, this is also relatively easy for being received by the numerous representatives of 3GPP.Cause
This, one of candidate scheme of mobile robustness self-optimizing is to 3GPP SON in the SON of one of hot spot that can be current as 3GPP
Relevant standardization body proposes, to can overcome the disadvantages that corresponding blank in SON standards.
In addition, it is worth noting that, since the scheme in the present invention not only can be adapted for the mobile robustness of SON ranges
In self-optimizing, it is readily applicable to LTE and its follow-up evolvement network（Such as LTE+）In traditional mobile robustness it is manual
In optimization.So even if cannot be adopted by standard, can also be used as a kind of easy-to-use for LTE and its follow-up evolution net
Network（Such as LTE+）The scheme coordinated of mobility parameters implement.
One of ordinary skill in the art will appreciate that realizing that all or part of step of above-described embodiment can pass through hardware
It completes, relevant hardware can also be instructed to complete by program, the program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
Description of the invention provides for the sake of example and description, and is not exhaustively or will be of the invention
It is limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.It selects and retouches
It states embodiment and is to more preferably illustrate the principle of the present invention and practical application, and those skilled in the art is enable to manage
Various embodiments with various modifications of the solution present invention to design suitable for special-purpose.
Claims (10)
1. a kind of of short duration resident inspection optimization method, which is characterized in that including：
First community base station is when determining user terminal being switched to second community, counting user terminal staying in first community
The time is stayed, and residence time is added in the historical information of user terminal, wherein residence time is that user terminal is small from third
The time interval being switched to after area's access first community, to the decision of first community base station by user terminal between second community；
It is unnecessary to judge whether user terminal has occurred in first community according to the historical information of user terminal for second community base station
It is of short duration resident, including：
Second community base station is after the switching request for receiving the transmission of first community base station, using the historical information of user terminal,
Judge whether residence time is less than scheduled residence time threshold value；
If residence time is less than scheduled residence time threshold value, whether the movement speed that user terminal is detected in second community base station is small
In threshold speed；
If the movement speed of user terminal is less than threshold speed, second community base station further judges user terminal in first community
In resident whether it is necessary to wherein second community base station is equal in the signal strength of first community, second community and third cell
In the case of more than signal strength threshold, determine that user terminal being resident in first community is not necessarily to, first community, second
The signal strength of cell and third cell is included in the historical information of user terminal；
If user terminal being resident in first community is not necessarily to, second community base station determines user terminal in first community
It has occurred unnecessary of short duration resident；
If user terminal has occurred unnecessary of short duration resident in first community, second community base station is sent to optimization server
Of short duration resident report；
The of short duration resident report of optimization server by utilizing optimizes processing to network system.
2. according to the method described in claim 1, it is characterized in that：
Second community base station further includes after the switching request for receiving the transmission of first community base station：
Second community base station postpones scheduled time interval；
Then the historical information using user terminal is executed, judges whether residence time is less than the step of scheduled residence time threshold value
Suddenly.
3. according to the method described in any one of claim 1-2, it is characterised in that：
Optimizing the step of of short duration resident report of server by utilizing optimizes processing to network system includes：
The of short duration resident report number that optimization server statistics receive within the predetermined time；
Optimize server by third cell base station, it is small that statistics is switched to first within the predetermined time from third cell
Total switching times in area；
Optimization server judges whether the ratio of of short duration resident report number and total switching times is more than scheduled decision threshold；
If the ratio of of short duration resident switching times and total switching times is more than scheduled decision threshold, optimization server is to systematic parameter
Optimize processing.
4. according to the method described in claim 3, it is characterized in that：
Optimizing the step of server optimizes processing to systematic parameter includes：
Optimization server judges whether the covering purpose of first community is to make up covering cavity；
If the purpose of covering of first community is to make up covering cavity, optimizing server reduces the Base Transmitter of first community
Power.
5. according to the method described in claim 4, it is characterized in that：
If the covering purpose of first community is not configured to make up covering cavity, optimizes server instruction third cell base station and improve
Switching individual character offset parameter relative to first community；Or instruction third cell base station is not using first community as switching target
Cell.
6. a kind of of short duration resident inspection optimization system, which is characterized in that including：
First community base station, for when determining user terminal being switched to second community, counting user terminal to be in first community
In residence time, and residence time is added in the historical information of user terminal, wherein residence time be user terminal from
It determines user terminal being switched between the time between second community after third cell access first community, to first community base station
Every；
Second community base station judges whether user terminal has occurred in first community for the historical information according to user terminal
It is unnecessary of short duration resident, if user terminal had occurred in first community it is unnecessary of short duration resident, to optimization server hair
Send of short duration resident report；
Optimize server, for optimizing processing to network system using of short duration resident report；
Wherein, second community base station utilizes the history of user terminal after the switching request for receiving the transmission of first community base station
Information, judges whether residence time is less than scheduled residence time threshold value；If residence time is less than scheduled residence time threshold value,
Whether the movement speed for then detecting user terminal is less than threshold speed；If the movement speed of user terminal is less than threshold speed,
Further judge whether it is necessary to wherein second community base station is in first community, for resident in first community of user terminal
In the case that the signal strength of two cells and third cell is all higher than signal strength threshold, determine user terminal in first community
It is resident It is not necessary to, the signal strength of first community, second community and third cell is included in the historical information of user terminal
In；If user terminal being resident in first community is not necessarily to, it is determined that it is unnecessary that user terminal has occurred in first community
It is of short duration resident.
7. system according to claim 6, it is characterised in that：
Second community base station is additionally operable to after the switching request for receiving the transmission of first community base station, between postponing the scheduled time
Every then execution judges whether residence time is less than the behaviour of scheduled residence time threshold value using the historical information of user terminal
Make.
8. according to the system described in any one of claim 6-7, which is characterized in that system further includes third cell base station,
In：
Optimization server is additionally operable to count the of short duration resident report number received within the predetermined time；Pass through third cell
Base station, statistics are switched to total switching times of first community within the predetermined time from third cell；Judge of short duration stay
Stay whether the ratio of report number and total switching times is more than scheduled decision threshold；If of short duration resident switching times and total switching time
Several ratios is more than scheduled first decision threshold and/or total switching times and is more than the second decision threshold, to systematic parameter into
Row optimization processing；
Third cell base station, for counting the total switching time for being switched to first community within the scope of the predetermined time from third cell
Number, and report statistical result to optimization server.
9. system according to claim 8, it is characterised in that：
Optimization server is additionally operable to judge whether the covering purpose of first community is to make up covering cavity；If first community
Covering purpose is to make up covering cavity, then reduce the base station transmitting power of first community.
10. system according to claim 9, it is characterised in that：
Optimization server is additionally operable to, when the covering purpose of first community is not configured to make up covering cavity, indicate third cell base
It stands and improves switching individual character offset parameter relative to first community；Or instruction third cell base station is not using first community as cutting
Change Target cell.
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| GB2536241A (en) * | 2015-03-09 | 2016-09-14 | Vodafone Ip Licensing Ltd | Self-organising network engine for per user optimisation in a telecommunications network |
| CN106604224B (en) * | 2016-11-21 | 2020-11-17 | 北京拓明科技有限公司 | 4G residence ratio index acquisition method and system based on XDR |
| ES2941518T3 (en) * | 2018-01-23 | 2023-05-23 | Beijing Xiaomi Mobile Software Co Ltd | Information reporting method and apparatus |
| EP3831125B1 (en) * | 2018-08-01 | 2023-08-16 | Nokia Technologies Oy | Short stay handover with slice-unavailability |
| CN110621027B (en) * | 2019-03-05 | 2022-09-23 | 普天信息工程设计服务有限公司 | Short-dwell user discovery and short-dwell reason analysis method |
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| WO2010082763A2 (en) * | 2009-01-13 | 2010-07-22 | Samsung Electronics Co., Ltd. | Apparatus and method for handover in mobile communication system |
| WO2011023231A1 (en) * | 2009-08-27 | 2011-03-03 | Nokia Siemens Networks Oy | Method, apparatus and system for preventing the inititiation of a handover for a time period after the end of a service |
| CN102026232A (en) * | 2010-09-29 | 2011-04-20 | 新邮通信设备有限公司 | Cooperative measurement and switching setting optimization method among multiple cells in mobile communication network |
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| WO2010082763A2 (en) * | 2009-01-13 | 2010-07-22 | Samsung Electronics Co., Ltd. | Apparatus and method for handover in mobile communication system |
| WO2011023231A1 (en) * | 2009-08-27 | 2011-03-03 | Nokia Siemens Networks Oy | Method, apparatus and system for preventing the inititiation of a handover for a time period after the end of a service |
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