CN107318124A - A kind of cell switching method and device - Google Patents
A kind of cell switching method and device Download PDFInfo
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- CN107318124A CN107318124A CN201610264794.1A CN201610264794A CN107318124A CN 107318124 A CN107318124 A CN 107318124A CN 201610264794 A CN201610264794 A CN 201610264794A CN 107318124 A CN107318124 A CN 107318124A
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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：Obtaining and be currently accessed the abutting subdistrict that the user equipment (UE) measurement of cell-of-origin reports has same covering abutting subdistrict group with covering relation；According to the load condition with each cell in covering abutting subdistrict group, it is Target cell that a cell is determined from covering abutting subdistrict group；Indicate that UE switches to Target cell from cell-of-origin.The cell switching method and device of the present invention can largely reduce once unnecessary switching, system loading be reduced, while enabling UE to be directly 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 technology
GSM is " mobility " with one significant difference of fixed communications.Mobile communication
UE (User Equipment, user equipment) position is in the state being continually changing in system, due to single
The coverage of cell is always limited, in order to not influence Consumer's Experience, it is necessary to constantly change service for UE
Cell.In LTE (Long Term Evolution, Long Term Evolution) system, when UE is in
RRC_CONNECTED (Radio Resource Control Connected, wireless heterogeneous networks connection)
During state, mobility is mainly completed by switching or redirecting.
Switching is broadly divided into three phases：The related measurement of switching is issued, switch decision and switching are performed.Base
Stand by for the measurement configuration distributing of switching to UE, the UE reporting measurements after condition of measurement configuration is met
Report, base station switches over judgement according to measurement report, and selection target cell performs switching.
When Target cell is multiple same coverage cells, because common frequency measurement control is always issued at first,
UE can be always first switched in the Target cell of same frequency.The crowd is dense it is mobile when, can cause
The co-frequency cell load of target is increased rapidly, and the cell relative free of the other frequencies covered together with it.
In addition, in UE is initially accessed, because of various reasons, it is also possible to cause UE to be always linked into certain first
One frequency, the problem of also resulting in above-mentioned.To solve the above problems, existing LTE system design
Load balancing function come between balanced same coverage cell without specific electric load, still, load balancing function needs
The transfer of the UE between same coverage cell is completed by switching again, facility load is added, also postpones
UE enters opportunity of best cell.
The content of the invention
It is existing to solve the technical problem to be solved in the present invention is to provide a kind of cell switching method and device
The problem of there is once invalid switching in cell switch process.
In a first aspect, embodiments of the invention provide a kind of cell switching method, including：
Obtain and be currently accessed the abutting subdistrict that the user equipment (UE) measurement of cell-of-origin reports and have and closed with covering
The same covering abutting subdistrict group of system；
According to the load condition with each cell in covering abutting subdistrict group, determined from covering abutting subdistrict group
One cell is Target cell；
Indicate that UE switches to Target cell from cell-of-origin.
Wherein, according to the load condition with each cell in covering abutting subdistrict group, from covering abutting subdistrict group
It is middle to determine that a step of cell is Target cell includes：
Obtain with 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 alternative adjacent area is switched.
Wherein, choosing a step of first community is as Target cell from alternative adjacent area is switched includes：
Poll chooses a first community from alternative adjacent area is switched；
Switching, which is sent, to the first community of selection prepares message, and it is accurate in the switching for receiving first community return
After standby successful message, it is Target cell to determine first community.
Wherein, choosing a step of first community is as Target cell from alternative adjacent area is switched includes：
It is any from alternative adjacent area is switched to choose a second community；
Switching, which is sent, to the second community of selection prepares message, and it is accurate in the switching for receiving second community return
It is any from alternative adjacent area is switched to choose a first community after standby failure；
Switching is sent to first community and prepares message, and is prepared successfully in the switching for receiving first community return
Message when, determine first community be Target cell.
Wherein, switching preparation message is being sent to second community, and in the switching for receiving second community return
While preparing failure, in addition to：
It is capacity reasons when the reason for the switching of return prepares failure, then in the given time, no longer chooses the
Two cells, and the load condition of second community is set to second load condition opposite with the first load condition.
Wherein, obtain and be currently accessed the abutting subdistrict that the user equipment (UE) measurement of cell-of-origin reports have it is same
The step of same covering abutting subdistrict group of covering relation, includes：
According to the covering relation between each abutting subdistrict for the cell-of-origin safeguarded in advance, obtain with UE measurements
The abutting subdistrict of report has the same covering abutting subdistrict group with covering relation.
Second aspect, embodiments of the invention provide a kind of cell switching device, including：
Acquisition module, the adjoining that the user equipment (UE) measurement for obtaining and being currently accessed cell-of-origin is reported is small
Area has the same covering abutting subdistrict group with covering relation；
Determining module, it is adjacent from same covering for according to the load condition with each cell in covering abutting subdistrict group
Connect and determine that a cell is Target cell in small district's groups；
Indicating module, Target cell is switched to for indicating UE from cell-of-origin.
Wherein it is determined that module includes：
First acquisition submodule, for obtaining with covering abutting subdistrict group, load condition is the first load shape
The alternative adjacent area of switching of state；
Submodule is chosen, for choosing a first community as Target cell from alternative adjacent area is switched.
Wherein, choosing submodule includes：
First chooses unit, for one first community of poll selection from alternative adjacent area is switched；
First determining unit, prepares message, and receiving for sending switching to the first community of selection
The switching that one cell is returned prepares after successful message, and it is Target cell to determine first community.
Wherein, choosing submodule includes：
Second chooses unit, and a second community is chosen for any from alternative adjacent area is switched；
First processing units, prepare message, and receiving for sending switching to the second community of selection
The switching that two cells are returned prepares after failure, any from alternative adjacent area is switched to choose a first community；
Second determining unit, prepares message, and receiving first community for sending switching to first community
When the switching of return prepares successful message, it is Target cell to determine first community.
Wherein, choosing submodule also includes：
Second processing unit, for being capacity reasons when the reason for the switching returned prepares failure, then predetermined
In time, second community is no longer chosen, and the load condition of second community is set to and the first load condition
The second opposite load condition.
Wherein, acquisition module includes：
Second acquisition submodule, is closed for the covering between each abutting subdistrict according to the cell-of-origin safeguarded in advance
System, obtains the abutting subdistrict reported with UE measurements with the same covering abutting subdistrict group with covering relation.
The above-mentioned technical proposal of the present invention at least includes following beneficial effect：
Compared with prior art, cell switching method and device provided in an embodiment of the present invention be largely
Unnecessary switching is reduced once, system loading is reduced, while enabling UE directly to switch rapidly
To Target cell.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to the embodiment of the present invention
In required for the accompanying drawing that uses be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, are not paying creative labor
Under the premise of, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 represents the wireless coverage schematic diagram of a scenario that target side is multiple same coverage cells；
Fig. 2 represents the existing cell switching schematic diagram in the wireless coverage scene shown in Fig. 1；
Fig. 3 represents the cell switching schematic diagram of the embodiment of the present invention in the wireless coverage scene shown in Fig. 1；
Fig. 4 represents the schematic flow sheet for the cell switching method that the inventive method embodiment is provided；
Fig. 5 represents a specific implementation example of the cell switching method that the inventive method embodiment is provided；
Fig. 6 represents the signalling diagram of the cell switching method of the first specific embodiment of the invention；
Fig. 7 represents the schematic flow sheet of the cell switching method of the first specific embodiment of the invention；
Fig. 8 represents the signalling diagram of the cell switching method of the second specific embodiment of the invention；
Fig. 9 represents the schematic flow sheet of the cell switching method of the second specific embodiment of the invention；
Figure 10 represents the structural representation for the cell switching device that apparatus of the present invention embodiment is provided.
Embodiment
To make the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with attached
Figure and specific embodiment are described in detail.
Load balancing function, is for balancing the load between minizone, frequency between wireless access technology.
This function can balance the performance of whole system, improve the stability of system.This function is according to serving cell
Cell operating flux is rationally disposed with its neighboring cell load state, and system resource is efficiently used, is to improve
The capacity of system and the stability for improving system.In general, load balancing function can be divided into three
The individual stage.
In measuring phases, the load condition of lasting monitoring and renewal serving cell and the load condition of neighbor cell.
If there is X2 interface, different station neighboring cell load information is periodically obtained by X2 interface, or pass through inside
Message is obtained with base station neighboring cell load information.If UTRAN (UMTS Terrestrial Radio Access
Network, UMTS Terrestrial radio access network) system support RIM (RAN Information Management,
Wireless access network information management) process, it is negative by S1 mouthfuls of RIM Procedure Acquisition UTRAN system adjacent cells
Lotus information.
In the judgement stage, the metrical information collected according to measuring phases judges whether serving cell is in high negative
Lotus state.If serving cell is in higher load condition, the load balancing execution stage will be triggered.Otherwise,
Load measurement stage and judgement stage can be repeated.
In the stage of execution, serving cell is in higher load condition.Some of serving cell user equipment is chosen
In go perform A4 (load balancing in LTE) or B1 (load balancing between system) measurement, according to
UE measurement result, underload adjacent area is switched to by the UE selected for switching.In the condition of blind handover
Under, UE is directly switched to underload adjacent cell.PRB (the Physical of the load of Radio Resource, i.e. cell
Resource Block, Physical Resource Block) utilization rate is to carry out load balancing this stage uniquely to consider
Load factor.
Referring to Fig. 1 and Fig. 2, in existing cell switching method, there is same coverage cell in switching target side
Under scene, it is likely that produce UE and to be switched to target side with the cell 1 in coverage cell from cell-of-origin, so
Afterwards according to load balancing, and UE is switched to the situation of cell 2 from cell 1, so add once without
Effect switching, is transmitted while the interface-free resources for wasting preciousness are used for invalid hand off signaling.Referring to Fig. 3,
To solve the above problems, the inventive method embodiment provides a kind of cell switching method, consider measurement and
UE, is directly switched to the cell of the target side of the condition of satisfaction by load balancing, so, can be in existing skill
On the basis of art, a UE handoff procedure is reduced, system loading is reduced, interface-free resources are saved, improved
The experience of user.
Fig. 4 is referred to, it is illustrated that the flow for the cell switching method that the inventive method embodiment is provided is shown
It is intended to, the cell switching method that embodiments of the invention are provided may comprise steps of：
Step 101, obtain and be currently accessed the abutting subdistrict tool that the user equipment (UE) measurement of cell-of-origin is reported
There is the same covering abutting subdistrict group of same covering relation.
Here, when it is determined that changing serving cell to UE, the adjoining reported according to the UE measurements got
Cell, obtains the abutting subdistrict reported with UE measurements with the same covering abutting subdistrict group with covering relation.
Step 102, it is small from same covering adjoining according to the load condition with each cell in covering abutting subdistrict group
It is Target cell that a cell is determined in district's groups.
Here, the load condition with each cell in covering abutting subdistrict group is obtained, then according to the negative of each cell
Lotus state determines that a cell is Target cell from covering abutting subdistrict group.The present embodiment is for covering
The acquisition modes of the load condition of each cell are not construed as limiting in the group of abutting subdistrict, are only illustrated here.For example,
It can be obtained for this with the cell for belonging to same base station in covering abutting subdistrict group by the inside story of base station
Take the load condition of cell；For this with the cell for belonging to different base station in covering abutting subdistrict group, work as base station
Between be configured with X2 interface and transmit it is normal when, can by X2 interface obtain with covering abutting subdistrict group in
The load condition of the cell of different base station, when being configured without X2 interface or X2 interface failure between base station, and together
When support RIM processes, can be different in the group of abutting subdistrict with covering by the RIM Procedure Acquisitions of S1 interfaces
The load condition of the cell of base station.In addition, it is necessary to which the target determined in explanation, above-mentioned steps 102 is small
Area, is in covering abutting subdistrict group, according to the load condition with each cell in covering abutting subdistrict group
And a certain cell determined, the abutting subdistrict that the UE measurements not necessarily got are reported.
Step 103, indicate that UE switches to Target cell from cell-of-origin.
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 with each cell in covering abutting subdistrict group,
Determine that a step of cell is Target cell can include from covering abutting subdistrict group：
Obtain with 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 opposite with first load condition the
Two load conditions, are referred to as low load condition by the first load condition here, and the second load condition is referred to as high load capacity
State., will be with covering abutting subdistrict group by the step, load condition is the cell of low load condition
It is used as the alternative adjacent area of switching.Furthermore it is possible to will be higher load condition with load condition in covering abutting subdistrict group
Cell be set to choose.
A first community is chosen as Target cell from alternative adjacent area is switched.
In one embodiment, it is above-mentioned to choose a first community as the step of Target cell from alternative adjacent area is switched
Suddenly it can include：
Poll chooses a first community from alternative adjacent area is switched；
Here, the strategy chosen using poll chooses a cell, i.e., above-mentioned first from alternative adjacent area is switched
Cell.Alternatively, it is also possible to choose a cell from alternative adjacent area is switched using the strategy of any selection.
Switching, which is sent, to the first community of selection prepares message, and it is accurate in the switching for receiving first community return
After standby successful message, it is Target cell to determine first community.
Here, switching is sent to the first community of selection using existing procedure and prepares message, and receiving this
The switching that first community is returned prepares after successful message, and first community is defined as into Target cell, to perform
Above-mentioned steps 103.
In one embodiment, it is above-mentioned to choose a first community as the step of Target cell from alternative adjacent area is switched
Suddenly include：
It is any from alternative adjacent area is switched to choose a second community；
Here, a cell, i.e., above-mentioned second are chosen from alternative adjacent area is switched using the strategy of any selection
Cell.Alternatively, it is also possible to tactful one cell of selection from alternative adjacent area is switched chosen using poll.It is logical
Cross any choose or strategy that poll is chosen can will be fifty-fifty approximately to need to carry out cell in cell-of-origin
The UE of switching is almost fifty-fifty switched to each cell in covering abutting subdistrict group.
Switching, which is sent, to the second community of selection prepares message, and it is accurate in the switching for receiving second community return
It is any from alternative adjacent area is switched to choose a first community after standby failure；
Here, because the load condition of second community changes, or other reasonses, such as second community link
Exception, RRC congestions etc., so that cause to receive second community and return to switch to prepare failure, this
When, a cell is arbitrarily chosen from alternative adjacent area is switched again.
Switching is sent to first community and prepares message, and is prepared successfully in the switching for receiving first community return
Message when, determine first community be Target cell.
Further, in one embodiment, switching preparation message is being sent to second community, and received
It is further comprising the steps of while the switching that second community is returned prepares failure：
It is capacity reasons when the reason for the switching of return prepares failure, then in the given time, no longer chooses the
Two cells, and the load condition of second community is set to second load condition opposite with the first load condition.
Here, safeguarding in advance has one to switch the mark for preparing to fail because of capacity reasons, when the switching of return is accurate
When the reason for standby failure is capacity reasons, then the mark is triggered, in the given time, no longer choose second small
Area, and the load condition of second community is set to the second load condition, i.e. higher load condition.In addition, should
The scheduled time can be configured according to practical application request, for example, setting the scheduled time to be 1 minute.
Fig. 5 is referred to, in one embodiment, by taking cell A as an example, in the neighbour reported with UE measurements
Connecing cell has with standby from switching in the presence of cell A, and in the same covering abutting subdistrict group of covering relation
Select and cell A is chosen in adjacent area (now, cell A load condition is low load condition, and small here
Area A is the above-mentioned second community arbitrarily chosen from alternative adjacent area is switched).Cell-of-origin is sent to cell A
Switching prepares message, and may have multiple UE within the same period switches over to cell A, Huo Zheqi
The reason for he may occur load variations, causes cell A load condition to change, now, small
Area A returns to switching and prepares failure, and is capacity reasons, i.e. No the reason for switching preparation failure
Radio resources available in target cell (not having any usable radio resources in Target cell),
At this moment, cell-of-origin is when the switching for receiving cell A returns prepares failure, and triggering is tieed up in advance
Shield because capacity reasons switch prepare failure mark, cell A load condition is set to high load capacity
State, i.e., be set to high load capacity cell by cell A, and sets timer 1 minute (scheduled time) of timing,
Cell A was no longer chosen in this 1 minute, when the timer times out, then again by cell A load
State is set to low load condition, i.e., cell A is set into underload cell.
In addition, in one embodiment, within a period of time, the switching for receiving the return of certain cell prepares failure
The number of times of message when reaching with predetermined value, reduce the selection probability of certain cell, wherein, switching prepares to lose
The reason for losing is not capacity reasons.Here, the return that certain cell reaches predetermined value is received in a period of time
Switching prepares the number of times of failed message, then it represents that certain cell is abnormal, now increases punishment strategy, reduces certain small
The selection probability in area.
Wherein, in step 101, obtain and be currently accessed the neighbour that the user equipment (UE) measurement of cell-of-origin is reported
Connecing the step of cell has the same covering abutting subdistrict group with covering relation can include：
According to the covering relation between each abutting subdistrict for the cell-of-origin safeguarded in advance, obtain with UE measurements
The abutting subdistrict of report has the same covering abutting subdistrict group with covering relation.
Here, the covering relation having between each abutting subdistrict is safeguarded in cell-of-origin in advance, and according to each abutting subdistrict
Between covering relation be provided with covering abutting subdistrict group.Covering relation between each abutting subdistrict can be with
Obtained by cell configuration data.Wherein it is possible to set a group ID per together covering abutting subdistrict group,
It is each with covering abutting subdistrict group to distinguish.
The cell switching method that the inventive method embodiment is provided, considers measurement and load balancing, directly
UE is switched to the cell of the target side of the condition of satisfaction, the invalid of UE can be largely reduced and cut
Process is changed, system loading is reduced, interface-free resources have been saved, the experience of user is improved.
Based on above method, apparatus of the present invention embodiment provides a kind of device to realize the above method.
Referring to Figure 10, it is illustrated that the structure for the cell switching device that apparatus of the present invention embodiment is provided is shown
It is intended to, device embodiment of the invention provides a kind of cell switching device, including：Acquisition module 1010,
Determining module 1020 and indicating module 1030.
Acquisition module 1010, the neighbour that the user equipment (UE) measurement for obtaining and being currently accessed cell-of-origin is reported
Cell is connect with the same covering abutting subdistrict group with covering relation；
Determining module 1020, for according to the load condition with each cell in covering abutting subdistrict group, from same
Cover and determine that a cell is Target cell in the group of abutting subdistrict；
Indicating module 1030, Target cell is switched to for indicating UE from cell-of-origin.
Wherein it is determined that module 1020 includes：First acquisition submodule and selection submodule.
First acquisition submodule, for obtaining with covering abutting subdistrict group, load condition is the first load shape
The alternative adjacent area of switching of state；
Submodule is chosen, for choosing a first community as Target cell from alternative adjacent area is switched.
Wherein, choosing submodule includes：First chooses unit and the first determining unit.
First chooses unit, for one first community of poll selection from alternative adjacent area is switched；
First determining unit, prepares message, and receiving for sending switching to the first community of selection
The switching that one cell is returned prepares after successful message, and it is Target cell to determine first community.
Wherein, choosing submodule includes：Second chooses unit, first processing units and the second determining unit.
Second chooses unit, and a second community is chosen for any from alternative adjacent area is switched；
First processing units, prepare message, and receiving for sending switching to the second community of selection
The switching that two cells are returned prepares after failure, any from alternative adjacent area is switched to choose a first community；
Second determining unit, prepares message, and receiving first community for sending switching to first community
When the switching of return prepares successful message, it is Target cell to determine first community.
Further, choosing submodule also includes：Second processing unit.
Second processing unit, for being capacity reasons when the reason for the switching returned prepares failure, then predetermined
In time, second community is no longer chosen, and the load condition of second community is set to and the first load condition
The second opposite load condition.
Wherein, acquisition module 1010 includes：Second acquisition submodule.
Second acquisition submodule, is closed for the covering between each abutting subdistrict according to the cell-of-origin safeguarded in advance
System, obtains the abutting subdistrict reported with UE measurements with the same covering abutting subdistrict group with covering relation.
The cell switching method that the cell switching device that said apparatus embodiment is provided is provided with embodiment of the method
Belong to same design, it implements process and refers to embodiment of the method, to avoid repeating, repeat no more here.
The cell switching device that apparatus of the present invention embodiment is provided, closes and considers measurement and load balancing, directly will
UE is switched to the cell of the target side of the condition of satisfaction, can largely reduce UE invalid switching
Process, reduces system loading, has saved interface-free resources, improves the experience of user.
Finally, with reference to accompanying drawing, then by two specific embodiments the present invention is described in more detail.
Referring to Fig. 6 and Fig. 7, in the first specific embodiment, target side is multiple same coverage cells, source
To target side without X2 links, switching of the switching based on S1 of source to target side.Wherein, in Fig. 6,
Src eNB represent base station where cell-of-origin.
Step 701, UE measurement report is received.Here, UE is sent by Uu interfaces to cell-of-origin
Measure Report (measurement report), cell-of-origin obtains UE according to the UE of reception measurement report and measured
The abutting subdistrict reported.
Step 702, judge that the abutting subdistrict that measurement is reported whether there is same coverage cell.Here, that is, judge
With the presence or absence of the same covering abutting subdistrict group having with the abutting subdistrict that UE measurements are reported with covering relation.When
Judged result is yes, performs step 703, otherwise, flow terminates.
Step 703, determine whether that cell is in higher load condition.Here, pair reported with UE measurements
There is the load condition with each cell in the same covering abutting subdistrict group of covering relation to be sentenced for abutting subdistrict
It is disconnected, when judged result is yes, step 704 is performed, otherwise, step 705 is performed.
Step 704, the cell of higher load condition is set to and can not chosen.
Step 705, a same coverage cell is randomly selected.Here, it is random from covering abutting subdistrict group
A same coverage cell is chosen, cell-of-origin sends switching to the same coverage cell of the selection and prepares message, specifically
, by the S1 interfaces of place base station (Src eNB) to MME (Mobility Management Entity,
Mobile management entity) send Handover Required (switching is required) message, MME is to the same of selection
Coverage cell (the Dst eNB1Cell in Fig. 6:2) base station (Dst eNB1) where passes through S1 interfaces
Send Handover request (handover request) message；Cell-of-origin is in the same coverage cell for receiving selection
The switching of return prepares after successful message, and the same coverage cell of selection is defined as into Target cell, specifically,
The same coverage cell chosen sends Handover Request Ack (handover request confirmation) by S1 interfaces and disappeared
Cease and Handover Command (switching command) are sent to cell-of-origin by S1 interfaces to MME, MME
Message, now, Target cell is defined as by the same coverage cell of the selection.Mesh is not considered in this embodiment
Mark cell and return to the situation that switching prepares failure.
Step 706, indicate that UE performs cell switching.Here, cell-of-origin sends RRC Connection to UE
Reconfiguration (wireless resource control connection reconfiguration) message, UE sends RRC to Target cell
Connection reconfiguration complete (wireless resource control connection reconfiguration completion) message is to mesh
Cell is marked, 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
There are X2 links to target side and transmission is normal, switching of the switching based on X2 of source to target side.
Step 901, UE measurement report is received.Here, UE is sent by Uu interfaces to cell-of-origin
Measure Report (measurement report), cell-of-origin obtains UE according to the UE of reception measurement report and measured
The abutting subdistrict (the Dst Cella in Fig. 8) reported.
Step 902, judge that the abutting subdistrict that UE measurements are reported whether there is same coverage cell.Here, i.e.,
Judge whether the same covering abutting subdistrict group for having with covering relation with the abutting subdistrict that UE measurements are reported.
When judged result is yes, step 903 is performed, otherwise, flow terminates.
Step 903, determine whether that cell is in higher load condition.Here, pair reported with UE measurements
There is the load condition with each cell in the same covering abutting subdistrict group of covering relation to be sentenced for abutting subdistrict
It is disconnected, when judged result is yes, step 904 is performed, otherwise, step 905 is performed.
Step 904, the cell of higher load condition is set to and can not chosen.
Step 905, a same coverage cell is randomly selected.Here, it is random from covering abutting subdistrict group
A same coverage cell is chosen, cell-of-origin sends switching to the same coverage cell of selection and prepares message.Specifically,
Referring to Fig. 8, it is assumed that the same coverage cell of selection is cell b (Dst Cell b in Fig. 8), passes through place
The X2 interface of base station (Src eNB) sends Handover Required message to cell b.
Step 906, judge that switching is ready to respond to whether fail.Here, the switching that cell-of-origin is received is judged
It is ready to respond to whether be failure, if so, then performing step 907, otherwise, performs step 909.
Step 907, judge that switching prepares whether failure cause is capacity reasons.Here, judge that switching prepares
Whether the reason for failure is capacity reasons, i.e., whether reason is No radio resources available in target
Cell, if so, then performing step 908, otherwise, re-executes step 905.
Step 908, it is high load capacity cell with coverage cell to set this.Here, this covers together in the given time
The load condition of lid cell is set to higher load condition.
Referring to Fig. 8, in above-mentioned steps 906 to 908, cell b is returned by X2 interface to cell-of-origin
Handover Request Failure (handover request failure) message, then cell-of-origin choose one again with covering
Lid cell, i.e. cell c (Dst Cell c in Fig. 8), cell-of-origin are sent by X2 interface to cell c
Handover Required message, and after the switching for receiving cell c returns prepares successful message, will
Cell c is defined as Target cell, specifically, cell c sends Handover Request Ack by X2 interface
Cell c now, is defined as Target cell by message to cell-of-origin.
Step 909, indicate that UE performs cell switching.Here, cell-of-origin is sent out by Uu interfaces to UE
RRC Connection Reconfiguration message is sent, UE sends RRC connection to Target cell
Reconfiguration complete message is to Target cell, to complete to access Target cell.
For foregoing embodiment of the method, in order to be briefly described, therefore it is all expressed as to a series of action group
Close, but those skilled in the art should know, the present invention is not limited by described sequence of movement,
Because according to the present invention, some steps can be carried out sequentially or simultaneously using other.Secondly, this area skill
Art personnel should also know that embodiment described in this description belongs to preferred embodiment, and involved is dynamic
Make not necessarily essential to the invention.
It should be understood that " one embodiment " or " embodiment " that specification is mentioned in the whole text means and real
Apply the relevant special characteristic of example, structure or characteristic include at least one embodiment of the present invention in.Therefore,
" in one embodiment " or " in one embodiment " occurred everywhere in entire disclosure not necessarily refers to
Identical embodiment.In addition, these specific feature, structure or characteristics can be combined in any suitable manner
In one or more embodiments.
It should be noted that in inventive embodiments, such as first and second or the like relational terms are only
For an entity or operation and another entity or operate is made a distinction, and not necessarily require or secretly
Show between these entities or operation there is any this actual relation or order.
The unit illustrated as separating component can be or may not be it is physically separate, as
The part that unit is shown can be or may not be physical location, you can with positioned at a place, or
It can also be distributed on multiple NEs.It can select according to the actual needs therein some or all of
Unit realizes the purpose of this embodiment scheme.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit,
Can also be that unit is individually physically present, can also two or more units be integrated in a unit
In.
If the function is realized using in the form of SFU software functional unit and as independent production marketing or used
When, it can be stored in a computer read/write memory medium.Understood based on such, skill of the invention
The part or the part of the technical scheme that art scheme substantially contributes to prior art in other words can be with
Embodied in the form of software product, the computer software product is stored in a storage medium, including
Some instructions are to cause a computer equipment (can be personal computer, server, or network are set
It is standby etc.) perform all or part of step of each embodiment methods described of the invention.And foregoing storage medium
Including：USB flash disk, mobile hard disk, ROM, RAM, magnetic disc or CD etc. are various can be with storage program generation
The medium of code.
Described above is the preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made,
These improvements and modifications also should be regarded as protection scope of the present invention.
Claims (12)
1. a kind of cell switching method, it is characterised in that including：
Obtain and be currently accessed the abutting subdistrict that the user equipment (UE) measurement of cell-of-origin reports and have and closed with covering
The same covering abutting subdistrict group of system；
According to the load condition with each cell in covering abutting subdistrict group, from described with covering abutting subdistrict
It is Target cell that a cell is determined in group；
Indicate that the UE switches to the Target cell from the cell-of-origin.
2. cell switching method according to claim 1, it is characterised in that described according to described same
The load condition of each cell in the group of abutting subdistrict is covered, is determined from the abutting subdistrict group with covering one small
The step of area is Target cell includes：
Obtain in the abutting subdistrict group with covering, 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.
3. cell switching method according to claim 2, it is characterised in that described from the switching
Choosing a step of first community is as Target cell in alternative adjacent area includes：
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 returned receiving the first community
Switching prepare after successful message, it is Target cell to determine the first community.
4. cell switching method according to claim 2, it is characterised in that described from the switching
Choosing a step of first community is as Target cell in alternative adjacent area includes：
It is any from the alternative adjacent area of switching to choose a second community；
Switching is sent to the second community of selection and prepares message, and is returned receiving the second community
Switching prepare after failure, it is any from the alternative adjacent area of the switching to choose a first community；
Switching is sent to the first community and prepares message, and is receiving the switching that the first community is returned
When preparing successful message, it is Target cell to determine the first community.
5. cell switching method according to claim 4, it is characterised in that small to described second
Area sends switching and prepares message, and prepares failure in the switching for receiving the second community return
Meanwhile, in addition to：
It is capacity reasons when the reason for the switching of return prepares failure, then in the given time, no longer chooses institute
Second community is stated, and the load condition of the second community is set to opposite with first load condition
Second load condition.
6. cell switching method according to claim 1, it is characterised in that the acquisition with it is current
There is the same covering with covering relation to abut for the abutting subdistrict that the user equipment (UE) measurement of access cell-of-origin is reported
The step of small district's groups, includes：
According to the covering relation between each abutting subdistrict for the cell-of-origin safeguarded in advance, obtain and surveyed with UE
The abutting subdistrict reported is measured with the same covering abutting subdistrict group with covering relation.
7. a kind of cell switching device, it is characterised in that including：
Acquisition module, the adjoining that the user equipment (UE) measurement for obtaining and being currently accessed cell-of-origin is reported is small
Area has the same covering abutting subdistrict group with covering relation；
Determining module, for according to the load condition with each cell in covering abutting subdistrict group, from described
It is Target cell with one cell of determination in covering abutting subdistrict group；
Indicating module, the Target cell is switched to for indicating the UE from the cell-of-origin.
8. cell switching device according to claim 7, it is characterised in that the determining module bag
Include：
First acquisition submodule, for obtaining in the abutting subdistrict group with covering, load condition is first negative
The alternative adjacent area of switching of lotus state；
Submodule is chosen, for choosing a first community as Target cell from the alternative adjacent area of switching.
9. cell switching device according to claim 8, it is characterised in that the selection submodule
Including：
First chooses unit, for poll one first community of selection from the switching alternative adjacent area；
First determining unit, prepares message, and receiving for sending switching to the first community of selection
Prepare to the switching that the first community is returned after successful message, it is Target cell to determine the first community.
10. cell switching device according to claim 8, it is characterised in that the selection submodule
Including：
Second chooses unit, and a second community is chosen for any from the alternative adjacent area of switching；
First processing units, prepare message, and receiving for sending switching to the second community of selection
Prepare to the switching that the second community is returned after failure, arbitrarily selected from the alternative adjacent area of switching
Take a first community；
Second determining unit, message is prepared for sending switching to the first community, and described receiving
When the switching that first community is returned prepares successful message, it is Target cell to determine the first community.
11. cell switching device according to claim 10, it is characterised in that the selection submodule
Block also includes：
Second processing unit, for being capacity reasons when the reason for the switching returned prepares failure, then predetermined
In time, no longer choose the second community, and by the load condition of the second community be set to it is described
The second opposite load condition of first load condition.
12. cell switching device according to claim 7, it is characterised in that the acquisition module bag
Include：
Second acquisition submodule, for covering between each abutting subdistrict according to the cell-of-origin safeguarded in advance
Lid relation, obtains the abutting subdistrict reported with UE measurements with 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 |
|---|---|
| CN107318124A true CN107318124A (en) | 2017-11-03 |
| CN107318124B CN107318124B (en) | 2019-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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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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| Country | Link |
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| CN (1) | CN107318124B (en) |
| WO (1) | WO2017185880A1 (en) |
Cited By (1)
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|---|---|---|---|---|
| CN109196909A (en) * | 2018-09-03 | 2019-01-11 | 北京小米移动软件有限公司 | Cell switching method and device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN109196909A (en) * | 2018-09-03 | 2019-01-11 | 北京小米移动软件有限公司 | Cell switching method and device |
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| CN113873607B (en) * | 2018-09-03 | 2023-10-31 | 北京小米移动软件有限公司 | Cell switching method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107318124B (en) | 2019-11-05 |
| WO2017185880A1 (en) | 2017-11-02 |
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