CN107318124B - A kind of cell switching method and device - Google Patents
A kind of cell switching method and device Download PDFInfo
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- CN107318124B CN107318124B CN201610264794.1A CN201610264794A CN107318124B CN 107318124 B CN107318124 B CN 107318124B CN 201610264794 A CN201610264794 A CN 201610264794A CN 107318124 B CN107318124 B CN 107318124B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/08—Load balancing or load distribution
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/22—Performing reselection for specific purposes for handling the traffic
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Abstract
The present invention provides a kind of cell switching method and device, wherein the cell switching method includes: to obtain the abutting subdistrict reported with the user equipment (UE) measurement for being currently accessed source cell with the same covering abutting subdistrict group with covering relation；According to the load condition of each cell in same covering abutting subdistrict group, determine that a cell is Target cell from the group of same covering abutting subdistrict；Indicate that UE switches to Target cell from source cell.Cell switching method and device of the invention can largely reduce primary unnecessary switching, reduce system loading, while UE being enable directly to be switched to Target cell rapidly.
Description
Technical field
The present invention relates to the communications field, a kind of cell switching method and device are particularly related to.
Background technique
Mobile communication system and one significant difference of fixed communications are " mobility ".UE in mobile communication system
(User Equipment, user equipment) position is in continually changing state, since the coverage area of single subdistrict always has
Limit, in order to not influence user experience, need constantly to be UE replacement serving cell.In LTE (Long Term Evolution, length
Phase evolution) in system, when UE is in RRC_CONNECTED (Radio Resource Control Connected, radio resource
Control connection) state when, mobility is mainly completed by switching or redirecting.
Switching is broadly divided into three phases: the relevant measurement of switching issues, switch decision and switching execute.Base station will be used for
The measuring configuration of switching is handed down to UE, and the UE reporting measurement reports after condition of measuring configuration meets, base station is according to measurement report
Judgement is switched over, selection target cell executes switching.
When Target cell is multiple same coverage cells, because common frequency measurement control always issues at first, UE is always
It can be first switched in the Target cell of same frequency.The crowd is dense it is mobile when, will lead to the co-frequency cell load of target
It increases rapidly, and with it with the cell relative free of other frequency points of covering.In addition, in UE initial access, because various
Reason, it is also possible to cause UE to be always linked into some frequency point first, also result in above-mentioned problem.To solve above-mentioned ask
Topic, existing LTE system devise load balancing function come balanced same coverage cell between without specific electric load, still, load is equal
Weighing apparatus function needs to complete the transfer of the UE between same coverage cell by switching again, increases facility load, also delays
UE enters the opportunity of best cell.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of cell switching method and devices, are cut with solving existing cell
There are problems that primary invalid switching during changing.
In a first aspect, the embodiment of the present invention provides a kind of cell switching method, comprising:
Obtaining and be currently accessed the abutting subdistrict that the user equipment (UE) measurement of source cell reports has with the same of covering relation
Cover abutting subdistrict group；
According to the load condition of each cell in same covering abutting subdistrict group, determination is one small from the group of same covering abutting subdistrict
Area is Target cell；
Indicate that UE switches to Target cell from source cell.
Wherein, it according to the load condition of each cell in same covering abutting subdistrict group, is determined from the group of same covering abutting subdistrict
The step of one cell is Target cell include:
It obtains in covering abutting subdistrict group, load condition is the alternative adjacent area of switching of the first load condition；
A first community is chosen as Target cell from switching in alternative adjacent area.
Wherein, choosing a first community as the step of Target cell from the alternative adjacent area of switching includes:
A first community is chosen from poll in alternative adjacent area is switched；
Switching is sent to the first community of selection and prepares message, and is prepared successfully in the switching for receiving first community return
Message after, determine first community be Target cell.
Wherein, choosing a first community as the step of Target cell from the alternative adjacent area of switching includes:
A second community is arbitrarily chosen from switching in alternative adjacent area；
Switching is sent to the second community of selection and prepares message, and prepares failure in the switching for receiving second community return
Message after, arbitrarily choose a first community from switching in alternative adjacent area；
Switching is sent to first community and prepares message, and prepares successful message in the switching for receiving first community return
When, determine that first community is Target cell.
Wherein, switching preparation message is being sent to second community, and is preparing to lose in the switching for receiving second community return
While the message lost, further includes:
It is capacity reasons when the reason of the switching of return prepares failure, then in the given time, no longer chooses second community,
And second load condition opposite with the first load condition is set by the load condition of second community.
Wherein, obtaining and be currently accessed the abutting subdistrict that the user equipment (UE) measurement of source cell reports has same covering relation
Same covering abutting subdistrict group the step of include:
According to the covering relation between each abutting subdistrict for the source cell safeguarded in advance, the adjoining reported with UE measurement is obtained
Cell has the same covering abutting subdistrict group with covering relation.
Second aspect, the embodiment of the present invention provide a kind of cell switching device, comprising:
Module is obtained, the abutting subdistrict that the user equipment (UE) measurement for obtaining and being currently accessed source cell reports has same
The same covering abutting subdistrict group of covering relation；
Determining module, for the load condition according to each cell in same covering abutting subdistrict group, from same covering abutting subdistrict
Determine that a cell is Target cell in group；
Indicating module is used to indicate UE from source cell and switches to Target cell.
Wherein it is determined that module includes:
First acquisition submodule, for obtaining in covering abutting subdistrict group, load condition is cutting for the first load condition
Change alternative adjacent area；
Submodule is chosen, for choosing a first community as Target cell from the alternative adjacent area of switching.
Wherein, choosing submodule includes:
First selection unit, for one first community of poll selection from switching alternative adjacent area；
First determination unit prepares message for sending switching to the first community of selection, and is receiving first community
After the switching of return prepares successful message, determine that first community is Target cell.
Wherein, choosing submodule includes:
Second selection unit, for arbitrarily choosing a second community from the alternative adjacent area of switching；
First processing units prepare message for sending switching to the second community of selection, and are receiving second community
After the switching of return prepares failure news, a first community is arbitrarily chosen from switching in alternative adjacent area；
Second determination unit prepares message for sending switching to first community, and is receiving first community return
When switching prepares successful message, determine that first community is Target cell.
Wherein, submodule is chosen further include:
The second processing unit, for being capacity reasons when the reason of the switching returned prepares failure, then in the given time,
Second community is no longer chosen, and sets the second load shape opposite with the first load condition for the load condition of second community
State.
Wherein, obtaining module includes:
Second acquisition submodule is obtained for the covering relation between each abutting subdistrict according to the source cell safeguarded in advance
Take the abutting subdistrict reported with UE measurement that there is the same covering abutting subdistrict group with covering relation.
Above-mentioned technical proposal of the invention is include at least the following beneficial effects:
Compared with prior art, cell switching method and device provided in an embodiment of the present invention largely reduce
Primary unnecessary switching, reduces system loading, while UE being enable directly to be switched to Target cell rapidly.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, needed in being described below to the embodiment of the present invention
Attached drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention,
For those of ordinary skill in the art, without any creative labor, it can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 shows the wireless coverage schematic diagram of a scenario that target side is multiple same coverage cells；
Fig. 2 indicates existing cell switching schematic diagram in wireless coverage scene shown in Fig. 1；
Fig. 3 indicates the cell switching schematic diagram of the embodiment of the present invention in wireless coverage scene shown in Fig. 1；
Fig. 4 indicates the flow diagram for the cell switching method that embodiment of the present invention method provides；
Fig. 5 indicates a specific implementation example of the cell switching method that embodiment of the present invention method provides；
Fig. 6 indicates the signalling diagram of the cell switching method of the first specific embodiment of the invention；
Fig. 7 indicates the flow diagram of the cell switching method of the first specific embodiment of the invention；
Fig. 8 shows the signalling diagrams of the cell switching method of the second specific embodiment of the invention；
Fig. 9 indicates the flow diagram of the cell switching method of the second specific embodiment of the invention；
Figure 10 indicates the structural schematic diagram for the cell switching device that apparatus of the present invention embodiment provides.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
Load balancing function is the load for balancing minizone, between frequency between wireless access technology.This function can
To balance the performance of whole system, the stability of system is improved.This function is closed according to serving cell and its neighboring cell load state
Reason deployment cell operating flux, and system resource is efficiently used, to improve the capacity of system and improve the stability of system.In
Under normal circumstances, load balancing function can be divided into three phases.
In measuring phases, the load condition of the load condition and neighboring community of lasting monitoring and update serving cell.If
There are X2 interface, periodically obtain different station neighboring cell load information by X2 interface, or obtain with base station adjacent area by inside story
Information on load.If UTRAN (UMTS Terrestrial Radio Access Network, UMTS Terrestrial radio access network)
System supports RIM (RAN Information Management, wireless access network information management) process, passes through S1 mouthfuls of RIM
Process obtains UTRAN system adjacent cell information on load.
In the judgement stage, judge whether serving cell is in high load capacity shape according to the metrical information that measuring phases are collected
State.If serving cell is in higher load condition, the load balancing execution stage will be triggered.Otherwise, load measuring can be repeated
Amount stage and judgement stage.
In the stage of execution, serving cell is in higher load condition.Certain user's equipment in serving cell, which is selected, goes to hold
Row A4 (load balancing in LTE) or B1 (load balancing between system) measurement, according to the measurement result of UE, will select and is used to cut
The UE changed is switched to underload adjacent area.Under conditions of blind handover, UE is directly switched to underload adjacent cell.Radio resource
Load, i.e. PRB (Physical Resource Block, Physical Resource Block) utilization rate of cell are to carry out load in this stage
The balanced load factor uniquely to be considered.
Referring to Fig. 1 and Fig. 2, in existing cell switching method, in the case where switching target side has the scene of same coverage cell, very
There may be UE is switched to target side with the cell 1 in coverage cell from source cell, then according to load balancing, and by UE from
Cell 1 is switched to the case where cell 2, increases primary invalid switching in this way, while wasting valuable interface-free resources and being used for
Invalid hand off signaling transmission.Referring to Fig. 3, to solve the above problems, embodiment of the present invention method provides a kind of cell switching side
Method comprehensively considers measurement and load balancing, UE is directly switched to the cell of the target side of the condition of satisfaction, in this way, can be existing
On the basis of having technology, a handoff procedure of UE is reduced, reduces system loading, interface-free resources is saved, improves the experience of user.
Fig. 4 is referred to, shows the flow diagram for the cell switching method that embodiment of the present invention method provides, this
The cell switching method that the embodiment of invention provides, may comprise steps of:
Step 101, obtaining and be currently accessed the abutting subdistrict that the user equipment (UE) measurement of source cell reports has with covering
The same covering abutting subdistrict group of relationship.
Here, determine serving cell is replaced to UE when, according to the abutting subdistrict that the UE measurement got reports, obtain and
The abutting subdistrict that UE measurement reports has the same covering abutting subdistrict group with covering relation.
Step 102, according to the load condition of each cell in same covering abutting subdistrict group, from the group of same covering abutting subdistrict really
A fixed cell is Target cell.
Here, the load condition with each cell in covering abutting subdistrict group is obtained, then according to the load condition of each cell
Determine that a cell is Target cell from the group of same covering abutting subdistrict.The present embodiment is for each small in the group of same covering abutting subdistrict
The acquisition modes of the load condition in area are not construed as limiting, and are only illustrated here.For example, for belonging in the same covering abutting subdistrict group
Cell in same base station can obtain the load condition of cell by the inside story of base station；For this with covering abutting subdistrict
The cell for belonging to different base station in group can be obtained same when being configured with X2 interface between base station and transmission is normal by X2 interface
The load condition for covering the cell of the base station abutting subdistrict Zu Zhongyi, when configuration X2 interface no between base station or X2 interface failure, and
It supports RIM process simultaneously, the negative of the cell with the covering base station abutting subdistrict Zu Zhongyi can be obtained by the RIM process of S1 interface
Lotus state.In addition, it is necessary to explanation, the Target cell determined in above-mentioned steps 102, be in the group of same covering abutting subdistrict,
According to this with a certain cell for covering the load condition of each cell in the group of abutting subdistrict and determination, the UE not necessarily got
Measure the abutting subdistrict reported.
Step 103, instruction UE switches to Target cell from source cell.
Here, above-mentioned steps 103 belong to existing procedure, and therefore not to repeat here for the present embodiment.
In an embodiment, step 102, according to the load condition of each cell in same covering abutting subdistrict group, from same covering
Determine that a step of cell is Target cell may include: in the group of abutting subdistrict
It obtains in covering abutting subdistrict group, load condition is the alternative adjacent area of switching of the first load condition；
Here, the load condition of cell includes the first load condition and second load opposite with first load condition
State, is known as low load condition for the first load condition here, and the second load condition is known as higher load condition.By the step,
Same will cover in the group of abutting subdistrict, load condition is the cell of low load condition as the alternative adjacent area of switching.Furthermore it is possible to will
It is set as to choose with the cell that load condition in covering abutting subdistrict group is higher load condition.
A first community is chosen as Target cell from switching in alternative adjacent area.
In one embodiment, it is above-mentioned from switch a step of first community is as Target cell is chosen in alternative adjacent area can be with
Include:
A first community is chosen from poll in alternative adjacent area is switched；
Here, the strategy chosen using poll chooses a cell, i.e., above-mentioned first community from the alternative adjacent area of switching.Separately
Outside, a cell can also be chosen from the alternative adjacent area of switching using the strategy of any selection.
Switching is sent to the first community of selection and prepares message, and is prepared successfully in the switching for receiving first community return
Message after, determine first community be Target cell.
Here, switching is sent to the first community of selection using existing procedure and prepares message, and is first small receiving this
After the switching that area returns prepares successful message, first community is determined as Target cell, to execute above-mentioned steps 103.
In one embodiment, above-mentioned to choose a step of first community is as Target cell packet from the alternative adjacent area of switching
It includes:
A second community is arbitrarily chosen from switching in alternative adjacent area；
Here, a cell, i.e., above-mentioned second community are chosen from the alternative adjacent area of switching using the strategy of any selection.Separately
Outside, a cell can also be chosen from the alternative adjacent area of switching using the strategy that poll is chosen.By arbitrarily choosing or poll
The strategy of selection approximate will can fifty-fifty cover together to need the UE for carrying out cell switching to be almost fifty-fifty switched in source cell
Each cell in the group of lid abutting subdistrict.
Switching is sent to the second community of selection and prepares message, and prepares failure in the switching for receiving second community return
Message after, arbitrarily choose a first community from switching in alternative adjacent area；
Here, the load condition variation due to second community or other reasons, such as second community link is abnormal, RRC
Congestion etc. returns to switching preparation failure news so as to cause second community is received, at this point, again from the alternative adjacent area of switching
Arbitrarily choose a cell.
Switching is sent to first community and prepares message, and prepares successful message in the switching for receiving first community return
When, determine that first community is Target cell.
Further, in one embodiment, switching preparation message is being sent to second community, and is receiving second community
It is further comprising the steps of while the switching of return prepares failure news:
It is capacity reasons when the reason of the switching of return prepares failure, then in the given time, no longer chooses second community,
And second load condition opposite with the first load condition is set by the load condition of second community.
Here, maintenance in advance has one because capacity reasons switch the mark for preparing to fail, when the switching of return prepares failure
The reason of when being capacity reasons, then trigger the mark, in the given time, no longer selection second community, and by second community
Load condition is set as the second load condition, i.e. higher load condition.In addition, the predetermined time can according to practical application request into
Row setting, for example, it is 1 minute that the predetermined time, which is arranged,.
Fig. 5 is referred to, in one embodiment, by taking cell A as an example, is had in the abutting subdistrict reported with UE measurement same
There are cell A in the same covering abutting subdistrict group of covering relation, and have chosen cell A (this from the alternative adjacent area of switching
When, the load condition of cell A is low load condition, and cell A is above-mentioned from switching the arbitrarily chosen in alternative adjacent area here
Two cells).Source cell to cell A send switching prepare message, may have within the same period multiple UE to cell A into
The reason of row switches or load variations may occur in other, causes the load condition of cell A to change, at this point, cell
The reason of A returns to switching and prepares failure news, and switching prepares failure is capacity reasons, i.e. No radio resources
Available in target cell (not having any usable radio resources in Target cell), at this moment, source cell is receiving
To cell A return switching prepare failure news when, trigger safeguard in advance because capacity reasons switch prepare failure mark
Know, sets higher load condition for the load condition of cell A, i.e., set high load capacity cell for cell A, and timer is set
Periodically 1 minute (predetermined time) no longer chooses cell A in this 1 minute, when the timer times out, then again by cell A's
Load condition is set as low load condition, i.e., sets underload cell for cell A.
In addition, in one embodiment, whithin a period of time, the switching for receiving the return of certain cell prepares failure news
When number is reached with predetermined value, the selection probability of certain cell is reduced, wherein the reason of switching preparation fails is not capacity original
Cause.Here, prepare the number of failed message in the switching for receiving the return that certain cell reaches predetermined value for a period of time, then it represents that
Certain cell is abnormal, increases punishment strategy at this time, reduces the selection probability of certain cell.
Wherein, in step 101, obtaining and be currently accessed the abutting subdistrict that the user equipment (UE) measurement of source cell reports has
With covering relation same covering abutting subdistrict group the step of may include:
According to the covering relation between each abutting subdistrict for the source cell safeguarded in advance, the adjoining reported with UE measurement is obtained
Cell has the same covering abutting subdistrict group with covering relation.
Here, the covering relation having between each abutting subdistrict is safeguarded in source cell in advance, and according between each abutting subdistrict
Covering relation is provided with covering abutting subdistrict group.Covering relation between each abutting subdistrict can pass through cell configuration data
It obtains.Wherein it is possible to for a group ID is arranged per covering abutting subdistrict group together, it is each with covering abutting subdistrict group to distinguish.
The cell switching method that embodiment of the present invention method provides, comprehensively considers measurement and load balancing, directly cuts UE
The cell of the target side of the condition of satisfaction is changed to, the invalid handoff procedure of UE can be largely reduced, it is negative to reduce system
Lotus has saved interface-free resources, improves the experience of user.
Based on above method, apparatus of the present invention embodiment provides a kind of device to realize the above method.
Referring to Figure 10, the structural schematic diagram for the cell switching device that apparatus of the present invention embodiment provides is shown, this
The Installation practice of invention provides a kind of cell switching device, comprising: obtains module 1010, determining module 1020 and instruction mould
Block 1030.
Module 1010 is obtained, the abutting subdistrict tool that the user equipment (UE) measurement for obtaining and being currently accessed source cell reports
There is the same covering abutting subdistrict group of same covering relation；
Determining module 1020, for being abutted from same covering according to the load condition with each cell in covering abutting subdistrict group
Determine that a cell is Target cell in cell group；
Indicating module 1030 is used to indicate UE from source cell and switches to Target cell.
Wherein it is determined that module 1020 includes: the first acquisition submodule and selection submodule.
First acquisition submodule, for obtaining in covering abutting subdistrict group, load condition is cutting for the first load condition
Change alternative adjacent area；
Submodule is chosen, for choosing a first community as Target cell from the alternative adjacent area of switching.
Wherein, choosing submodule includes: the first selection unit and the first determination unit.
First selection unit, for one first community of poll selection from switching alternative adjacent area；
First determination unit prepares message for sending switching to the first community of selection, and is receiving first community
After the switching of return prepares successful message, determine that first community is Target cell.
Wherein, choosing submodule includes: the second selection unit, first processing units and the second determination unit.
Second selection unit, for arbitrarily choosing a second community from the alternative adjacent area of switching；
First processing units prepare message for sending switching to the second community of selection, and are receiving second community
After the switching of return prepares failure news, a first community is arbitrarily chosen from switching in alternative adjacent area；
Second determination unit prepares message for sending switching to first community, and is receiving first community return
When switching prepares successful message, determine that first community is Target cell.
Further, submodule is chosen further include: the second processing unit.
The second processing unit, for being capacity reasons when the reason of the switching returned prepares failure, then in the given time,
Second community is no longer chosen, and sets the second load shape opposite with the first load condition for the load condition of second community
State.
Wherein, obtaining module 1010 includes: the second acquisition submodule.
Second acquisition submodule is obtained for the covering relation between each abutting subdistrict according to the source cell safeguarded in advance
Take the abutting subdistrict reported with UE measurement that there is the same covering abutting subdistrict group with covering relation.
The cell switching method that the cell switching device and embodiment of the method that above-mentioned apparatus embodiment provides provide belongs to together
One design, specific implementation process are detailed in embodiment of the method, and to avoid repeating, which is not described herein again.
The cell switching device that apparatus of the present invention embodiment provides closes and considers measurement and load balancing, directly switches UE
To the cell of the target side for the condition that meets, the invalid handoff procedure of UE can be largely reduced, system loading is reduced,
Interface-free resources have been saved, the experience of user is improved.
Finally, the present invention is described in more detail in conjunction with attached drawing, then by two specific embodiments.
Referring to Fig. 6 and Fig. 7, in the first specific embodiment, target side be multiple same coverage cells, source to target side without
X2 link, the switching of source to target side is based on the switching of S1.Wherein, in Fig. 6, Src eNB indicates base station where source cell.
Step 701, the measurement report of UE is received.Here, UE sends Measure Report to source cell by Uu interface
The measurement report of (measurement report), source cell UE based on the received obtains the abutting subdistrict that reports of UE measurement.
Step 702, judge that the abutting subdistrict that measurement reports whether there is same coverage cell.Here, that is, it judges whether there is
There is the same covering abutting subdistrict group with covering relation with the abutting subdistrict that UE measurement reports.When judging result be it is yes, execute step
Rapid 703, otherwise, process terminates.
Step 703, it judges whether there is cell and is in higher load condition.Here, have to the abutting subdistrict reported with UE measurement
There is the load condition of each cell in the same covering abutting subdistrict group of same covering relation to be judged, when judging result be it is yes, hold
Otherwise row step 704 executes step 705.
Step 704, the cell of higher load condition being set to can not choose.
Step 705, a same coverage cell is randomly selected.Here, one is randomly selected from the group of same covering abutting subdistrict
Same coverage cell, source cell sends switching to the same coverage cell of the selection and prepares message, specifically, passing through place base station (Src
ENB S1 interface) sends Handover to MME (Mobility Management Entity, mobile management entity)
Required (switching requires) message, the base station where MME to the same coverage cell (the Dst eNB1Cell:2 in Fig. 6) of selection
(Dst eNB1) sends Handover request (switching request) message by S1 interface；Source cell is receiving the same of selection
After the switching that coverage cell returns prepares successful message, the same coverage cell of selection is determined as Target cell, specifically, choosing
The same coverage cell taken sends Handover Request Ack (switching request confirmation) message by S1 interface and leads to MME, MME
It crosses S1 interface and sends Handover Command (switching command) message to source cell, at this point, by the same coverage cell of the selection
It is determined as Target cell.Do not consider that Target cell returns to the case where switching prepares failure news in this embodiment.
Step 706, instruction UE executes cell switching.Here, source cell sends RRC Connection to UE
Reconfiguration (wireless resource control connection reconfiguration) message, UE send RRC connection to Target cell
Reconfiguration complete (wireless resource control connection reconfiguration completion) message is to Target cell, to complete to access
Target cell.
Referring to Fig. 8 and Fig. 9, in the second specific embodiment, target side is multiple same coverage cells, source has to target side
X2 link and transmission is normal, the switching of source to target side is based on the switching of X2.
Step 901, the measurement report of UE is received.Here, UE sends Measure Report to source cell by Uu interface
The measurement report of (measurement report), source cell UE based on the received obtains the abutting subdistrict (Dst in Fig. 8 that reports of UE measurement
Cella)。
Step 902, judge that the abutting subdistrict that UE measurement reports whether there is same coverage cell.Here, that is, judge whether to deposit
There is the same covering abutting subdistrict group with covering relation in the abutting subdistrict reported with UE measurement.When judging result is yes, execution
Step 903, otherwise, process terminates.
Step 903, it judges whether there is cell and is in higher load condition.Here, have to the abutting subdistrict reported with UE measurement
There is the load condition of each cell in the same covering abutting subdistrict group of same covering relation to be judged, when judging result be it is yes, hold
Otherwise row step 904 executes step 905.
Step 904, the cell of higher load condition being set to can not choose.
Step 905, a same coverage cell is randomly selected.Here, one is randomly selected from the group of same covering abutting subdistrict
Same coverage cell, source cell send switching to the same coverage cell of selection and prepare message.Specifically, referring to Fig. 8, it is assumed that selection
It is cell b (Dst Cell b in Fig. 8) with coverage cell, is sent by the X2 interface of place base station (Src eNB) to cell b
Handover Required message.
Step 906, judge switching is ready to respond to whether fail.Here, the switching for judging that source cell receives is ready to respond to
Whether it is failure, if so, thening follow the steps 907, otherwise, executes step 909.
Step 907, judge that switching prepares whether failure cause is capacity reasons.Here, judge that switching prepares the original of failure
Whether because being capacity reasons, i.e., whether reason is No radio resources available in target cell, if
It is to then follow the steps 908, otherwise, re-execute the steps 905.
Step 908, it is high load capacity cell that this, which is arranged, with coverage cell.Here, in the given time this with coverage cell
Load condition is set as higher load condition.
Referring to Fig. 8, in above-mentioned steps 906 to 908, cell b returns to Handover to source cell by X2 interface
Request Failure (switching request failure) message, then a same coverage cell, i.e. cell c (Fig. 8 are chosen in source cell again
In Dst Cell c), source cell sends Handover Required message to cell c by X2 interface, and small receiving
After the switching that area c is returned prepares successful message, cell c is determined as Target cell, specifically, cell c is sent out by X2 interface
Send Handover Request Ack message to source cell, at this point, cell c is determined as Target cell.
Step 909, instruction UE executes cell switching.Here, source cell sends RRC to UE by Uu interface
Connection Reconfiguration message, UE send RRC connection reconfiguration to Target cell
Complete message is to Target cell, to complete access Target cell.
For the aforementioned method embodiment, for simple description, therefore, it is stated as a series of action combinations, still
Those skilled in the art should understand that the present invention is not limited by the sequence of acts described, because according to the present invention, it is certain
Step can be performed in other orders or simultaneously.Secondly, those skilled in the art should also know that, it is described in the specification
Embodiment belong to preferred embodiment, related movement is not necessarily essential to the invention.
It should be understood that " one embodiment " or " embodiment " that specification is mentioned in the whole text mean it is related with embodiment
A particular feature, structure, or characteristic is included at least one embodiment of the present invention.Therefore, occur everywhere in the whole instruction
" in one embodiment " or " in one embodiment " not necessarily refer to identical embodiment.In addition, these specific features, knot
Structure or characteristic can combine in any suitable manner in one or more embodiments.
It should be noted that in inventive embodiments, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, ROM, RAM, magnetic or disk etc. are various can store program code
Medium.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of cell switching method characterized by comprising
Obtaining and be currently accessed the abutting subdistrict that the user equipment (UE) measurement of source cell reports has same covering with covering relation
Abutting subdistrict group；
It obtains in the same covering abutting subdistrict group, load condition is the alternative adjacent area of switching of the first load condition；
A first community is chosen as Target cell from the alternative adjacent area of switching；
Indicate that the UE switches to the Target cell from the source cell；
Choosing a first community as the step of Target cell from the alternative adjacent area of switching described in wherein includes:
A second community is arbitrarily chosen from the alternative adjacent area of switching；
Switching is sent to the second community of selection and prepares message, and is prepared receiving the switching that the second community returns
After failure news, a first community is arbitrarily chosen from the alternative adjacent area of switching, when the switching of return prepares the original of failure
Because of non-capacity reasons, the switching for receiving the return of certain cell whithin a period of time prepares failure news number and reaches with predetermined
When value, the selected probability of the cell is reduced；
Switching is sent to the first community and prepares message, and successful receiving the switching preparation that the first community returns
When message, determine that the first community is Target cell.
2. cell switching method according to claim 1, which is characterized in that described to be chosen from the alternative adjacent area of switching
One first community includes: as the step of Target cell
Poll chooses a first community from the switching alternative adjacent area；
Switching is sent to the first community of selection and prepares message, and is prepared receiving the switching that the first community returns
After successful message, determine that the first community is Target cell.
3. cell switching method according to claim 1, which is characterized in that prepare sending switching to the second community
Message, and while receiving the switching preparation failure news that the second community returns, further includes:
It is that capacity reasons then in the given time no longer choose the second community when the reason of the switching of return prepares failure,
And second load condition opposite with first load condition is set by the load condition of the second community.
4. cell switching method according to claim 1, which is characterized in that the acquisition and the use for being currently accessed source cell
There is the step of same covering abutting subdistrict group of same covering relation to include: for the abutting subdistrict that family equipment UE measurement reports
According to the covering relation between each abutting subdistrict for the source cell safeguarded in advance, the adjoining reported with UE measurement is obtained
Cell has the same covering abutting subdistrict group with covering relation.
5. a kind of cell switching device characterized by comprising
Module is obtained, the abutting subdistrict that the user equipment (UE) measurement for obtaining and being currently accessed source cell reports has with covering
The same covering abutting subdistrict group of relationship；
First acquisition submodule, described in covering abutting subdistrict group for obtaining, load condition is cutting for the first load condition
Change alternative adjacent area；
Submodule is chosen, for choosing a first community as Target cell from the alternative adjacent area of switching；
Indicating module is used to indicate the UE from the source cell and switches to the Target cell；
Wherein the selection submodule includes:
Second selection unit, for arbitrarily choosing a second community from the alternative adjacent area of switching；
First processing units prepare message for sending switching to the second community of selection, and are receiving described second
After the switching that cell returns prepares failure news, a first community is arbitrarily chosen from the alternative adjacent area of switching；
Second determination unit prepares message for sending switching to the first community, and returns receiving the first community
When the switching returned prepares successful message, determine that the first community is Target cell；
Third processing unit receives whithin a period of time for being non-capacity reasons when the switching returned prepares the reason of failing
When reaching to the switching preparation failure news number that certain cell returns with predetermined value, the selected probability of the cell is reduced.
6. cell switching device according to claim 5, which is characterized in that the selection submodule includes:
First selection unit, for poll one first community of selection from the switching alternative adjacent area；
First determination unit prepares message for sending switching to the first community of selection, and is receiving described first
After the switching that cell returns prepares successful message, determine that the first community is Target cell.
7. cell switching device according to claim 5, which is characterized in that the selection submodule further include:
The second processing unit, for being capacity reasons when the reason of the switching returned prepares failure, then in the given time, no longer
The second community is chosen, and sets opposite with first load condition second for the load condition of the second community
Load condition.
8. cell switching device according to claim 5, which is characterized in that the acquisition module includes:
Second acquisition submodule is obtained for the covering relation between each abutting subdistrict according to the source cell safeguarded in advance
Take the abutting subdistrict reported with UE measurement that there is the same covering abutting subdistrict group with covering relation.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610264794.1A CN107318124B (en) | 2016-04-26 | 2016-04-26 | A kind of cell switching method and device |
| PCT/CN2017/075870 WO2017185880A1 (en) | 2016-04-26 | 2017-03-07 | Cell switching method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610264794.1A CN107318124B (en) | 2016-04-26 | 2016-04-26 | A kind of cell switching method and device |
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| Publication Number | Publication Date |
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| CN107318124A CN107318124A (en) | 2017-11-03 |
| CN107318124B true CN107318124B (en) | 2019-11-05 |
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| CN201610264794.1A Active CN107318124B (en) | 2016-04-26 | 2016-04-26 | A kind of cell switching method and device |
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| WO (1) | WO2017185880A1 (en) |
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| CN109196909B (en) * | 2018-09-03 | 2021-10-08 | 北京小米移动软件有限公司 | Cell switching method and device |
| CN113141625B (en) * | 2020-01-20 | 2024-03-08 | 上海大唐移动通信设备有限公司 | Method and device for determining cell coverage scene, electronic equipment and storage medium |
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| CN100373833C (en) * | 2004-03-29 | 2008-03-05 | 中兴通讯股份有限公司 | Load balancing method in system of broad band CDMA |
| CN102843722B (en) * | 2011-06-22 | 2018-01-09 | 中兴通讯股份有限公司 | With the synchronous method, cut-in method and device of coverage cell information on load |
| CN102752824B (en) * | 2012-06-29 | 2015-09-09 | 中国联合网络通信集团有限公司 | Different-system switching method and device |
| CN103686836B (en) * | 2012-09-19 | 2018-11-16 | 中兴通讯股份有限公司 | Method for handover control and device in a kind of cognitive radio system |
| US9565628B2 (en) * | 2013-07-03 | 2017-02-07 | Mediatek Inc. | Energy saving functionality for small cells in E-UTRA and E-UTRAN |
| CN106341853A (en) * | 2015-07-10 | 2017-01-18 | 中兴通讯股份有限公司 | Switching realizing method and device and base station |
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