CN105530671B - Inhibit the method and mobility management entity of pingpang handoff - Google Patents
Inhibit the method and mobility management entity of pingpang handoff Download PDFInfo
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- CN105530671B CN105530671B CN201510929284.7A CN201510929284A CN105530671B CN 105530671 B CN105530671 B CN 105530671B CN 201510929284 A CN201510929284 A CN 201510929284A CN 105530671 B CN105530671 B CN 105530671B
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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
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
- H04W36/0088—Scheduling hand-off measurements
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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
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
Abstract
The present invention provides a kind of methods and mobility management entity for inhibiting pingpang handoff, in the present invention, if a user equipment is once resident in Target cell, when user equipment is switched to the Target cell, the corresponding switching threshold of the Target cell is increased into preset threshold increment.In this way for the same cell, if a user equipment is repeatedly switched to the cell, so corresponding switching threshold of the cell can be gradually increased, it can be gradually increased so as to cause the difficulty for being switched to the cell, effectively can inhibit user equipment that pingpang handoff occurs between cells in this way.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of method for inhibiting pingpang handoff and mobile management are real
Body.
Background technique
3GPP (3rd Generation Partnership Project, third generation partner program) LTE (Long
Term Evolution, long term evolution) project be over the past two years 3GPP starting maximum new technology development project, it is this with
OFDM (Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexi)/FDMA
(frequency division multiple access, frequency division multiple access) is that the technology of core can be counted as " quasi- 4G " skill
Art.The main performance target of 3GPP LTE project includes: to be capable of providing downlink 100Mbps, uplink in 20MHz spectral bandwidth
The peak rate of 50Mbps；Improve the performance of Cell Edge User；Improve cell capacity；Reduce system delay.
Common networking is mutually usually covered by the base station of multiphase same frequency or different frequency into different clothes in practical networking
Cell of being engaged in provides seamless wireless service to UE (User Equipment, user equipment), when UE be in the neighboring community Liang Ge without
When line signal covers intersection, farther out, and there is also what is interfered with each other to ask between intra-frequency cells for the distance due to UE apart from base station
Topic, causes edge UE to tend not to preferably be serviced, wireless signal belongs to radio wave signal, and there are reflection interferences etc. to ask
Topic causes UE to receive wireless signal unstable, may cause UE and continually switch between serving cell and neighbor cell,
So that the user experience of edge UE further deteriorates.
Summary of the invention
It is an object of the invention to inhibit user equipment that pingpang handoff occurs.
In a first aspect, the present invention provides a kind of methods for inhibiting pingpang handoff, comprising:
When the history persistent district that Target cell is user equipment, and determine that signal quality difference reaches the Target cell
When current switching threshold, wherein the signal quality difference is the channel quality value of Target cell and the channel of serving cell
The difference of mass value；
Switching instruction is sent to the base station of the Target cell, and by the current switching threshold of the Target cell and is preset
The sum of threshold delta is updated to the switching threshold of the Target cell.
Further, comprising:
When Target cell is not the history persistent district of user equipment, and determine that signal quality difference reaches default switching threshold
When value, wherein the signal quality difference is the difference of the channel quality value of Target cell and the channel quality value of serving cell；
Switching instruction is sent to the base station of the Target cell, and recording the Target cell is going through for the user equipment
The default switching threshold is recorded as the switching threshold of the Target cell by history persistent district；Alternatively, by the default switching
Threshold value and the sum of preset threshold increment are recorded as the switching threshold of the Target cell.
Further, before sending switching instruction to the base station of the Target cell, the method also includes:
The switching request message that base station is sent is received, determines that signal quality difference reaches institute according to the switching request message
State the current switching threshold of Target cell；The switching request message be used to indicate Target cell channel quality value and service it is small
The difference of the channel quality value in area.
The signal quality difference reach the current switching threshold of the Target cell and preset threshold increment and.
Further, determine that the signal quality difference reaches the current switching threshold of the Target cell:
When signal quality difference reach the current switching threshold of the Target cell and preset threshold increment and, determine institute
It states signal quality difference and reaches the current switching threshold of the Target cell；
When signal quality difference be not up to the current switching threshold of the Target cell and preset threshold increment and, determination
The signal quality difference is not up to the current switching threshold of the Target cell.
Second aspect, the present invention provides a kind of mobility management entity, comprising:
Switching control module, for being the history persistent district of user equipment when Target cell, and signal quality difference reaches
When to the current switching threshold of the Target cell, wherein the signal quality difference be Target cell channel quality value with
The difference of the channel quality value of serving cell, the base station of Xiang Suoshu Target cell send switching instruction；
Handover information maintenance module, for by the current switching threshold of the Target cell and preset threshold increment and more
It is newly the switching threshold of the Target cell.
Further, the switching control module is also used to when Target cell not be the history persistent district of user equipment,
And signal quality difference reaches default switching threshold, wherein the signal quality difference be Target cell channel quality value with
The difference of the channel quality value of serving cell；Switching instruction is sent to the base station of the Target cell；
The handover information maintenance module be also used to record the Target cell be the user equipment history be resident it is small
The default switching threshold is recorded as the switching threshold of the Target cell by area；Alternatively, by the default switching threshold and in advance
If the sum of threshold delta is recorded as the switching threshold of the Target cell.
Further, the switching control module is also used to sending switching instruction to the base station of the Target cell
Before, the switching request message that base station is sent is received, determines that signal quality difference reaches the mesh according to the switching request message
Mark the current switching threshold of cell；The switching request message is used to indicate the channel quality value and serving cell of Target cell
The difference of channel quality value.
The switching control module be also used to when signal quality difference reach the current switching threshold of the Target cell with
The sum of preset threshold increment determines that the signal quality difference reaches the current switching threshold of the Target cell；When signal matter
Amount difference be not up to the current switching threshold of the Target cell and preset threshold increment and, determine the signal quality difference
The current switching threshold of the not up to described Target cell.
Further, the handover information maintenance module is also used to use for each of at least one user equipment
Family equipment, when the quantity in the corresponding history persistent district of the user equipment reaches preset quantity, what deletion wherein recorded earliest
History persistent district and the corresponding switching threshold in history persistent district.
In the present invention, if a user equipment is once resident in Target cell, user equipment is being switched to the target
When cell, the corresponding switching threshold of the Target cell is increased into preset threshold increment.In this way if a user equipment is repeatedly cut
The cell is changed to, it, can be by so as to cause the difficulty for being switched to the cell then the corresponding switching threshold of the cell can be gradually increased
It is cumulative big, effectively it can inhibit user equipment that pingpang handoff occurs between cells in this way.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of the method for inhibition pingpang handoff that one embodiment of the invention provides；
Fig. 2 is a kind of flow diagram of the method for inhibition pingpang handoff that one embodiment of the invention provides；
Fig. 3 is a kind of schematic diagram of application scenarios of the method for the inhibition pingpang handoff that one embodiment of the invention provides；
Fig. 4 is the flow diagram of the method for the inhibition pingpang handoff that one embodiment of the invention provides；
Fig. 5 is a kind of flow diagram of the method for inhibition pingpang handoff that one embodiment of the invention provides；
Fig. 6 is a kind of structural schematic diagram for mobility management entity that one embodiment of the invention provides；
Fig. 7 is a kind of structural schematic diagram for base station that one embodiment of the invention provides.
Specific embodiment
With reference to the accompanying drawings and examples, further description of the specific embodiments of the present invention.Following embodiment is only
For clearly illustrating technical solution of the present invention, and not intended to limit the protection scope of the present invention.
In a first aspect, one embodiment of the invention provides a kind of method for inhibiting pingpang handoff, it can be by MME
(Mobility Management Entity, mobility management entity) executes, and can effectively inhibit to occur in S1 switching
The problem of pingpang handoff, referring to Fig. 1, this method comprises:
Step S01 when the history persistent district that Target cell is user equipment, and determines that signal quality difference reaches described
When the current switching threshold of Target cell, wherein the signal quality difference be Target cell channel quality value and service it is small
The difference of the channel quality value in area, the base station of Xiang Suoshu Target cell send switching instruction；
The sum of the current switching threshold of the Target cell and preset threshold increment is updated to the target by step S02
The switching threshold of cell.
In method provided by the invention, if a user equipment is once resident in Target cell, cut by user equipment
When changing to the Target cell, the corresponding switching threshold of the Target cell is increased into preset threshold increment, in this way for same small
For area, if a user equipment is repeatedly switched to the cell, the corresponding switching threshold of the cell can be gradually increased, from
And cause the difficulty for being switched to the cell that can be gradually increased, effectively user equipment can be inhibited in cell in this way
Between pingpang handoff occurs.
Understandable to be, history persistent district here can refer to the cell that user equipment was once resident, specific
When implementation, MME can determine in several ways a cell whether be a user equipment history persistent district.For example,
Here history persistent district can determine according to the input of user, or may be that MME equipment is being directed to the user equipment
The cell recorded when switching instruction is sent to Target cell.When being realized in the latter matter, above-mentioned method may be used also
To include following process:
Step S03 when Target cell is not the history persistent district of user equipment, and determines that signal quality difference reaches pre-
If when switching threshold, wherein the signal quality difference is the channel quality value of Target cell and the channel quality of serving cell
The difference of value；Switching instruction is sent to the base station of the Target cell；
Step S04 records the history persistent district that the Target cell is the user equipment, by the default switching threshold
Value is recorded as the switching threshold of the Target cell；Alternatively, by the default switching threshold and preset threshold increment and record
For the switching threshold of the Target cell.
In this way, can automatically determine which cell is history persistent district.Reduce manual intervention.It is not difficult
Understand, in the specific implementation, without certainty precedence relationship, step S03 and step S04 between step S01, S02 here
Between also uninevitable precedence relationship, and also not no inevitable elder generation between step S01- step S02 and step S03- step S04
Sequence afterwards.
In the specific implementation, signal quality difference here refers to that the channel quality value of Target cell subtracts serving cell
The difference that channel quality value obtains.
It in the specific implementation, can also include determining in the method before above-mentioned step S01 and step S03
Whether signal quality difference reaches the process of the current switching threshold of the Target cell.Specifically, signal matter is determined here
Whether amount difference, which reaches the current switching threshold of the Target cell, can refer to whether the determining difference is more than or equal to the switching
Threshold value.If it is, illustrating the channel quality of Target cell, than serving cell, that channel quality is good is enough, can be cut
It changes.Otherwise the channel quality of the channel quality and serving cell that illustrate Target cell is not much different, and what is switched over has little significance.
Alternatively, in the specific implementation, can also determine whether the signal quality difference reaches the Target cell as follows
Current switching threshold: when signal quality difference is more than or equal to the current switching threshold and preset threshold increment of the Target cell
Sum, determine that the signal quality difference reaches the current switching threshold of the Target cell；When signal quality difference is less than institute
State the current switching threshold of Target cell and preset threshold increment and, determine that the signal quality difference is not up to the target
The current switching threshold of cell.Corresponding technical solution is also able to achieve general object of the present invention, should also fall into of the invention
Protection scope.
When implementation is embodied, the channel quality of serving cell here and the channel quality of Target cell can be by asking
It asks the user equipment measurement for carrying out cell switching to obtain, and is sent to base station corresponding to the serving cell of the user equipment, it should
Base station can generate channel quality and Target cell comprising being used to indicate serving cell according to the measured value of user equipment to report
Channel quality information switching request message.
At this point, the switching request message that MME can be sent by receiving the source base station of user equipment determines user equipment
Network environment whether meet in step S01 " Target cell is the history persistent district of user equipment, and signal quality difference reaches
In the switching threshold current to the Target cell " switching condition and/or step S03 " when Target cell is not user equipment
History persistent district, and signal quality difference reaches the current switching threshold of the Target cell " switching condition.
Understandable to be, the switching instruction in above-mentioned step S02 and step S04 is each meant for making Target cell
Execute the instruction of corresponding handover operation.Here corresponding handover operation, which can refer to, reserves corresponding channel for user equipment
Resource etc..The base station of Target cell executes corresponding handover operation according to switching instruction to complete corresponding handoff procedure.?
In practical application, the information such as user identifier can be carried in switching instruction here, how specific this of switching instruction is arranged, Ke Yican
When examining progress S1 switching in the prior art, it is sent to the switching instruction of Target cell, the present invention is no longer described in detail herein.
In the specific implementation, default in the preset threshold increment in above-mentioned step S02, step S03 and step S04 cuts
The size for changing threshold value can be set according to the actual situation, for example when above-mentioned signal quality value is RSRP, above-mentioned is pre-
If threshold delta can be 2db.And the default switching threshold in the preset threshold increment in step S02 and step S03 and step S04
Value may be different, and when executing step S02, and different according to the current switching threshold of Target cell, preset threshold increment can also
It can be different.When the corresponding switching threshold of Target cell is larger, preset threshold increment can be a biggish value, and target is small
When the corresponding switching threshold in area is smaller, preset threshold increment can be a lesser value.Or as needed, work as Target cell
When corresponding switching threshold is smaller, preset threshold increment can be a biggish value, and the corresponding switching threshold of Target cell
When larger, preset threshold increment can be a lesser value.Corresponding technical solution can reach basic mesh of the invention
, it should also fall into protection scope of the present invention.
In the specific implementation, in above-mentioned step S04, record Target cell is resident small for the history of the user equipment
Area, which can refer to, is added to the Target cell (cell ID) in the history persistent district list of the user equipment, and at this
The corresponding switching threshold that above-mentioned default switching threshold is recorded as to Target cell in the list of history persistent district.In this way in step
In rapid S02, the sum of the current switching threshold of Target cell and preset threshold increment is updated to the switching threshold of the Target cell
Value can refer to the switching threshold for updating the Target cell recorded in above-mentioned history persistent district list.
In the specific implementation, the method for above-described embodiment one can also include not shown in the figure:
Step S05, for each of at least one user equipment user equipment, in the corresponding history of the user equipment
When the quantity of persistent district reaches preset quantity, the history persistent district and the history persistent district pair wherein recorded earliest is deleted
The switching threshold answered.
It can reduce resource consumed by storage history persistent district and corresponding switching threshold in this way.And it is real
The case where border is that user equipment generally stays in a specific region within a specific period, and storing excess is gone through
History persistent district is not much realistic meaning for improving the effect for inhibiting pingpang handoff.
In the specific implementation, in above-mentioned step S05, it can be what the judgement at new record history persistent district was recorded
Whether the quantity of the corresponding history persistent district of the cell reaches preset quantity, and when being judged as YES, and deletion record is earliest
One history persistent district and corresponding switching threshold.Or in the specific implementation, in above-mentioned step S05, be also possible to by
Whether reach preset quantity according to the quantity for the corresponding history persistent district of the cell that the judgement of preset period is recorded, if so,
Then delete the X that records earliest history persistent districts (X be beyond number) and corresponding switching threshold.
Further, above-mentioned preset quantity can be specially 3.According to networking mode universal at present, a given zone
Domain is at most covered by the corresponding serving cell in three base stations, then only retaining three history persistent districts can inhibit user equipment
Pingpang handoff.Resource consumption can be further decreased in this way.
It is understandable to be, do not have between each step in step S05 and above-mentioned step S01- step S04 here yet
There is inevitable precedence relationship.
In the specific implementation, in above-mentioned method, it is also possible to meet other switching condition (load balancing comprising being made whether
Deng) deterministic process, MME should be finally to send to cut in the case where judging that current network environment also meets these switching conditions
Change instruction.These deterministic processes can carry out before each step described in the embodiment of the present invention, if being judged as NO, terminate
If process, no longer each deterministic process described in the execution embodiment of the present invention are executing this hair inventive embodiments institute be judged as
The each deterministic process stated.
Further include step S03- step S04 to above-mentioned method below with reference to another embodiment and passes through reception user equipment
Source base station send switching request message determine whether the case where meeting switching condition described in step S01 and step S02
It is illustrated, referring to fig. 2, this method may include following process:
Step S11 receives the switching request message that base station is sent, determines to be switched use according to the switching request message
Family equipment, Target cell, the channel quality value of serving cell and Target cell channel quality value；In the switching request message
It is used to indicate the letter of the channel quality of to be switched user equipment, Target cell, the channel quality of serving cell and Target cell
Breath；
Step S12, judge the Target cell whether be the user equipment history persistent district, obtain the first judgement
As a result；When first judging result, which is, is, step S13 is turned to；Otherwise step S15 is turned to；
Step S13, judges whether signal quality difference reaches the current switching threshold of the Target cell, obtains second and sentences
Disconnected result；The difference of the channel quality value of the channel quality value and serving cell of the signal quality difference Target cell；?
Two judging results are when being, to turn to step S14；When the second judging result is no, terminate process；
Step S14 sends switching instruction to the base station of Target cell, and by the current switching threshold of Target cell and presets
The sum of threshold delta is updated to the switching threshold of the Target cell；
Step S15 judges that the signal quality difference of serving cell is no and reaches default switching threshold, obtains third judgement knot
Fruit；When the third judging result, which is, is, step S16 is turned to；Otherwise, terminate process；
Step S16 sends switching instruction to the base station of Target cell, and recording the Target cell is the user equipment
History persistent district, the default switching threshold is recorded as to the switching threshold of the Target cell.
In method provided by the invention, if a user equipment is once resident in Target cell, cut by user equipment
When changing to the Target cell, the corresponding switching threshold of the Target cell is increased into preset threshold increment, if a user equipment is not
Once resident in Target cell, then after the user equipment is switched to the Target cell, it is small in the target to record the user equipment
Area is resident.In this way for the same cell, if a user equipment is repeatedly switched to the cell, the cell is corresponding
Switching threshold can be gradually increased, can be gradually increased so as to cause the difficulty for being switched to the cell, in this way
It is effective to inhibit user equipment that pingpang handoff occurs between cells.
In the specific implementation, the switching request message in above-mentioned step S11 can specifically refer to base station and be sent to
MME, for requesting mobility management entity to carry out the message of cell switching scheduling to be switched user equipment.With the prior art
In switching request message (handover request) unlike, in the embodiment of the present invention, also wrapped in switching request message
The information of channel quality containing the channel quality and Target cell for being used to indicate serving cell, enables MME to be cut according to this
It changes request message and determines the channel quality value of serving cell and the channel quality value of Target cell.Specifically, being used for here
It indicates the information of the channel quality value of serving cell and is used to indicate the information of the channel quality value of Target cell, can be use
Family equipment carries out the measured value that channel measurement obtains.For example it can be RSRP (the Reference Signal that measurement obtains
Receiving Power, Reference Signal Received Power) and/or RSRQ (ReferenceSignalReceivingQuality, ginseng
Examine signal receiving quality).Certainly in practical applications, the information of the above-mentioned channel quality for being used to indicate serving cell and it is used for
The information for indicating the channel quality of Target cell may be other kinds of information, in the channel matter that can indicate serving cell
Under the premise of the information of the channel quality of the information and instruction Target cell of amount, these information are specially which kind of type can't shadow
Implementation of the invention is rung, should also fall into protection scope of the present invention accordingly.
In the specific implementation, the information for being used to indicate user equipment in step S11 can be specially the use of user equipment
Family device identification (user ID) or other be capable of the information of unique identification user equipment, and be used to indicate the letter of Target cell
Breath then can for Target cell cell ID (cell ID) or other be capable of the information of unique identification Target cell.
It is understandable to be, the in the first judging result, the second judging result and third judging result in the present invention
One, second and third be only for different deterministic processes generate judging result distinguish, rather than refer in particular to "Yes" or
The judgement result of "No".
Second aspect, one embodiment of the invention provide another method for inhibiting pingpang handoff, and this method can be by base
It stands execution, referring to Fig. 3, this method may include:
Step S21 receives the A3 event of user equipment to report；
Step S22 sends switching request message to MME；The handoff request message, which contains, is used to indicate to be switched use
Family equipment, Target cell, the channel quality of serving cell and Target cell channel quality information.
It also include the channel quality of serving cell and the letter of Target cell in switching request message in the embodiment of the present invention
The information of road quality enables MME to determine the channel quality value and Target cell of serving cell according to the switching request message
Channel quality value, and then the method that threshold value pingpang handoff described in first aspect can be executed.Specifically, being used for here
It indicates the information of the channel quality of serving cell and is used to indicate the information of the channel quality of Target cell, can be set for user
The standby measured value for carrying out channel measurement and obtaining.For example it can be RSRP (the Reference Signal that measurement obtains
Receiving Power, Reference Signal Received Power) and/or RSRQ (ReferenceSignalReceivingQuality, ginseng
Examine signal receiving quality).Certainly in practical applications, the information of the above-mentioned channel quality for being used to indicate serving cell and it is used for
The information for indicating the channel quality of Target cell may be other kinds of information, in the channel matter that can indicate serving cell
Under the premise of the information of the channel quality of the information and instruction Target cell of amount, which kind of form is these information be embodied in not
It will affect implementation of the invention, should also fall into protection scope of the present invention accordingly.
Here A3 event can understand consistent, the i.e. service quality (RSRP/ of neighbor cell in the prior art
RSRQ) absolute a thresholding higher than the service quality of serving cell.Being specifically defined for A3 time is referred in 3GPP 36.331
Regulation about A3 event.
When implementation is embodied, the channel quality of serving cell here and the channel quality of Target cell can be by asking
It asks the user equipment measurement for carrying out cell switching to obtain, and is sent to base station corresponding to the serving cell of the user equipment, it should
Base station can generate channel quality and Target cell comprising being used to indicate serving cell according to the measured value of user equipment to report
Channel quality information switching request message.
Inhibit the side of pingpang handoff described in first aspect and second aspect below with reference to a kind of specific application scenarios
The detailed process of one of embodiment of method is described in detail, referring to fig. 4, it is assumed that user equipment U1 is currently at base station
The overlapping region of the cell C3 of the cell C1 of N1, the cell C2 of base station N2 and base station N3, and assume the current clothes of user equipment U1
Business cell is C1, and since the channel quality in cell C1 deteriorates, user equipment U1 carries out channel quality measurement (assuming that measurement is
The RSRP value of adjacent cell C2, C3 and serving cell C1) the RSRP value maximum of cell C2 is obtained, and A3 event is reported to base station N1,
Referring to Fig. 5, this method can be specifically included:
Step S41, base station N1 receive the A3 event that reports of user equipment U1, rear steering step S42.
Here the A3 event reported refers to that user equipment U1 has sent corresponding message to base station N1, and request switches over.
It can be small comprising the customer equipment identification of user equipment U1, the cell ID of Target cell C2, target in the message that A3 event reports
The information such as the RSRP value of area C2 and the RSRP value of serving cell.The particular content reported is referred to the prior art, herein not
It is described in detail again.
Step S42, base station N1 determine that Target cell is C2, and send switching request message, the switching request message to MME
In carry the RSRP value R2 of the device identification UID of user equipment U1, the cell ID CID of Target cell C2, Target cell C2
And the RSRP value R1 of serving cell C1, rear steering step S43.
The switching request message that step S43, MME reception base station is sent, determines user equipment according to the switching request message
The device identification UID of U1, the cell ID CID of Target cell C2, the RSRP value R2 of Target cell C2 and serving cell C1
RSRP value R1；Rear steering step S44.
Step S44, MME judge that the cell ID CID of Target cell C2 whether there is in the device identification UID of user equipment
In corresponding history persistent district list；If so, turning to step S45；If it is not, then turning to step S47.
Step S45, MME judge whether the RSRP value R2 of Target cell C2 and the difference of the RSRP value of serving cell reach mesh
Mark cell C2 switching threshold current in the list of history persistent district；If so, turning to step S46；If it is not, then terminating process；
Step S46, MME send switching instruction to the corresponding base station N2 of Target cell C2, and in the equipment of user equipment U1
It identifies in history persistent district list corresponding to UID, by Target cell C2 current switching threshold T and preset threshold increment △
The sum of the value of T is updated to the switching threshold T of Target cell, even T=T+ △ T.
Step S47, MME judge whether the RSRP value R2 of Target cell C2 and the difference of the RSRP value R1 of serving cell reach
To default switching threshold T0；If so, step S48 is turned to, if it is not, then terminating process.
Step S48, MME send switching instruction to the corresponding base station N2 of Target cell C2, rear steering step S49；
Step S49, MME judge in the corresponding history persistent district list of the customer equipment identification UID of user equipment U1
Whether history persistent district reaches preset quantity 3；If so, turning to step S410；If it is not, turning to step S411；
Step S410, MME delete the cell ID and the cell ID being recorded in the list of history persistent district earliest
Corresponding switching threshold, rear steering step S411.
Step S411, MME by the cell ID UID of Target cell C2 be added to the corresponding history of user equipment U1 be resident it is small
In area's list, and this is preset into switching threshold T0 as the corresponding switching threshold of cell ID UID of Target cell C2 and is recorded in
In the history persistent district list.Terminate process later.
After step S46 or S48, the base station N2 of Target cell C2, can be according to setting after receiving switching instruction
Fixed process executes corresponding handoff procedure, and corresponding contents may refer to the prior art, no longer be described in detail herein.
The third aspect, one embodiment of the invention provide a kind of MME, include: referring to Fig. 6, the MME
Switching control module 51, for working as the history persistent district that Target cell is user equipment, and signal quality difference
When reaching the current switching threshold of the Target cell, wherein the signal quality difference is the channel quality value of Target cell
With the difference of the channel quality value of serving cell, the base station of Xiang Suoshu Target cell sends switching instruction；
Handover information maintenance module 52, for by the current switching threshold of the Target cell and preset threshold increment and
It is updated to the switching threshold of the Target cell.
Further, switching control module 51 can be also used for when Target cell be not user equipment history be resident it is small
Area, and signal quality difference reaches the current switching threshold of the Target cell, wherein the signal quality difference is that target is small
The difference of the channel quality value of the channel quality value and serving cell in area；Switching instruction is sent to the base station of the Target cell；
The history that handover information maintenance module can be also used for recording that the Target cell is the user equipment at this time is stayed
Cell is stayed, the default switching threshold is recorded as to the switching threshold of the Target cell.
Further, handover information maintenance module 52 is also used to for each of at least one user equipment user
Equipment, when the quantity in the corresponding history persistent district of the user equipment reaches preset quantity, what deletion wherein recorded earliest is gone through
History persistent district and the corresponding switching threshold in history persistent district.
In some alternative embodiments, in the above-described embodiment, the default switching threshold is recorded as the target
The switching threshold of cell could alternatively be: it is small that the sum of the default switching threshold and preset threshold increment is recorded as the target
The switching threshold in area.It could alternatively be alternatively, above-mentioned signal quality difference reaches the current switching threshold of the Target cell
Signal quality difference reach the current switching threshold of the Target cell and preset threshold increment and.
Fourth aspect, the present invention provides an embodiments to provide a kind of base station, can be used for executing described in second aspect
Inhibition pingpang handoff method, referring to Fig. 7, which includes: reporting module 61, for receiving user equipment in base station
After the A3 event of report, switching request message is sent to MME；The handoff request message is set containing being used to indicate to be switched user
The information of the channel quality of standby, Target cell, the channel quality of serving cell and Target cell.
5th aspect, the present invention provides a kind of communication systems, which is characterized in that including MME described in first aspect and
Base station described in second aspect.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of method for inhibiting pingpang handoff characterized by comprising
When the history persistent district that Target cell is user equipment, and, determine that signal quality difference reaches the Target cell and works as
When preceding switching threshold, wherein the signal quality difference is the channel quality value of Target cell and the channel matter of serving cell
The difference of magnitude；
Switching instruction is sent to the base station of the Target cell, and by the current switching threshold of the Target cell and preset threshold
The sum of increment is updated to the switching threshold of the Target cell；
When Target cell is not the history persistent district of user equipment, and determine that signal quality difference reaches default switching threshold
When, wherein the signal quality difference is the difference of the channel quality value of Target cell and the channel quality value of serving cell；
Switching instruction is sent to the base station of the Target cell, and records the history that the Target cell is the user equipment and stays
Cell is stayed, the default switching threshold is recorded as to the switching threshold of the Target cell；Alternatively, by the default switching threshold
The switching threshold of the Target cell is recorded as with the sum of preset threshold increment.
2. the method as described in claim 1, which is characterized in that sending switching instruction to the base station of the Target cell
Before, the method also includes:
The switching request message that base station is sent is received, determines that signal quality difference reaches the mesh according to the switching request message
Mark the current switching threshold of cell；The switching request message is used to indicate the channel quality value and serving cell of Target cell
The difference of channel quality value.
3. the method as described in claim 1, which is characterized in that it is small that the determination signal quality difference reaches the target
The current switching threshold in area, comprising:
When signal quality difference reach the current switching threshold of the Target cell and preset threshold increment and, determine the letter
Number quality difference value reaches the current switching threshold of the Target cell；
When signal quality difference be not up to the current switching threshold of the Target cell and preset threshold increment and, described in determination
Signal quality difference is not up to the current switching threshold of the Target cell.
4. the method as described in claim 1, which is characterized in that the method also includes:
Number for each of at least one user equipment user equipment, in the corresponding history persistent district of the user equipment
When amount reaches preset quantity, the corresponding switching threshold in history persistent district and the history persistent district wherein recorded earliest is deleted
Value.
5. a kind of mobility management entity characterized by comprising
Switching control module for being the history persistent district of user equipment when Target cell, and determines that signal quality difference reaches
When to the current switching threshold of the Target cell, wherein the signal quality difference be Target cell channel quality value with
The difference of the channel quality value of serving cell, the base station of Xiang Suoshu Target cell send switching instruction；
Handover information maintenance module, for the current switching threshold of the Target cell and the sum of preset threshold increment to be updated to
The switching threshold of the Target cell；
The switching control module is also used to when Target cell not be the history persistent district of user equipment, and determines signal quality
When difference reaches default switching threshold, wherein the signal quality difference is the channel quality value and serving cell of Target cell
Channel quality value difference；Switching instruction is sent to the base station of the Target cell；
The handover information maintenance module is also used to record the history persistent district that the Target cell is the user equipment, will
The default switching threshold is recorded as the switching threshold of the Target cell；Alternatively, by the default switching threshold and default threshold
The sum of value increment is recorded as the switching threshold of the Target cell.
6. mobility management entity as claimed in claim 5, which is characterized in that the switching control module is also used to institute
The base station for stating Target cell is sent before switching instruction, the switching request message that base station is sent is received, according to the switching request
Message determines that signal quality difference reaches the current switching threshold of the Target cell；The switching request message is used to indicate mesh
Mark the difference of the channel quality value of cell and the channel quality value of serving cell.
7. mobility management entity as claimed in claim 5, which is characterized in that the switching control module is also used to work as signal
Quality difference value reach the current switching threshold of the Target cell and preset threshold increment and, determine the signal quality difference
Reach the current switching threshold of the Target cell；When signal quality difference is not up to the current switching threshold of the Target cell
With preset threshold increment and, determine that the signal quality difference is not up to the current switching threshold of the Target cell.
8. mobility management entity as claimed in claim 5, which is characterized in that the handover information maintenance module is also used to
For each of at least one user equipment user equipment, the quantity in the corresponding history persistent district of the user equipment reaches
When to preset quantity, the history persistent district wherein recorded earliest and the corresponding switching threshold in history persistent district are deleted.
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| CN107548109B (en) * | 2016-06-28 | 2020-04-10 | 大唐移动通信设备有限公司 | Cell switching method and device |
| CN109842900B (en) * | 2017-11-28 | 2020-12-04 | 大唐移动通信设备有限公司 | Method and device for inhibiting ping-pong handover |
| CN108174416B (en) * | 2017-12-12 | 2020-12-04 | 东软集团股份有限公司 | Method and apparatus for determining mobile terminal residence area and storage medium |
| CN115038135A (en) * | 2022-05-31 | 2022-09-09 | Oppo广东移动通信有限公司 | Cell residence method, device, equipment and medium |
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