CN103945469B - A kind of method and apparatus of determining Target cell - Google Patents
A kind of method and apparatus of determining Target cell Download PDFInfo
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- CN103945469B CN103945469B CN201310017826.4A CN201310017826A CN103945469B CN 103945469 B CN103945469 B CN 103945469B CN 201310017826 A CN201310017826 A CN 201310017826A CN 103945469 B CN103945469 B CN 103945469B
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Abstract
The embodiment of the invention discloses a kind of method and apparatus of determining Target cell, for solving the problem of that delay that switching existing in the prior art prepares is grown and is easy call drop.The method of the embodiment of the present invention includes：Serving BS is after the measurement report that the UE for receiving own services is sent, from the neighborhood region correlation chart of itself, the adjacent cell to match with the working frequency points of the Target cell for the UE reports for including in the measurement report and PCI is searched, and using the adjacent cell found as middle cell；If finding at least two middle cells, according to the second position information for including in the corresponding first position information in each middle cell locally preserved and measurement report, from least two middle cell, the Target cell of UE reports is determined.The embodiment of the present invention only needs UE to report a measurement report, so that it may accurately to determine Target cell, prepare delay to reduce switching, also reduce the call drop probability caused by delay is long.
Description
Technical field
The present invention relates to field of communication technology, more particularly to a kind of method and apparatus of determining Target cell.
Background technology
Long term evolution（Long Term Evolution, LTE）In the isomery layering on-premise network of system, macrocell
（macro cell）Layer and cell（small cell）Layer is possible to will appear overlapping covering, i.e., in the covering model of the macrocell
In enclosing, cell may be disposed simultaneously.So-called cell refers to that transmission power is provided less than the low power base station of common macro base station
Cell, for example, picocell（pico cell）, Femto cell（femto cell）Deng being all typical cell.
The physical layer of LTE system defines 504 Physical Cell Identifier altogether（Physical Cell Identifier,
PCI）, in order to avoid inter-cell interference, and make base station（eNB）Each adjacent cell can be correctly identified, PCI configurations need full
The following two requirements of foot：
First, not conflicting（collision-free）, i.e. the adjacent co-frequency cell of any two can not be used identical
PCI, and all co-frequency cells in the same eNB can not use identical PCI；
Second is that not obscuring（confusion-free）, i.e., cannot have in all adjacent cells of one cell any two with frequency
Cell uses identical PCI.
Since in the non-isomery on-premise networks of LTE, the adjacent cell quantity of macrocell, far fewer than 504, can pass through than relatively limited
The network planning or aspect of network self-configuration function avoid the problem that PCI conflicts or obscure, and therefore, in the non-isomery on-premise networks of LTE, lead to
The problem of being not in often PCI conflicts or obscuring.But be layered in on-premise network in LTE isomeries, it is used to improve frequency spectrum
Rate, cell typically operate in same frequency layer, if the quantity of the cell in a macrocell coverage area is more than 504,
The working frequency points of the cell situation identical with PCI there are two necessarily causing；Even if small in the macrocell coverage area
The quantity of cell does not reach 504, but since to typically use self-configuration function slight to configure for the base station of control cell
The PCI in area, therefore, the probability that identical PCI is configured for two different slight PCI conflicts or confusion region are also relatively high.
In handoff procedure, macro base station is to user equipment（UE）Configuration is measured, UE is according to the measurement configuration information received
Measurement is executed, and measurement report is reported to macro base station, the measurement report is for assisting macro base station to switch over judgement；Wherein,
It is typically that an adjacent cell is identified with the combination of the working frequency points of cell and PCI in measurement report.Currently, in order to solve
The problem of PCI conflicts or obscures, the network architecture shown in Figure 1, it is assumed that small cell1 and small cell3 are worked in
Same frequency layer and the identical PCI of use solve PCI conflicts using following mechanism in the prior art or obscure, including following step
Suddenly：
The signal of step 11, the cell of the UE measurement surroundings of macrocell service, when the reference signal of small cell1 connects
Receive power（Reference Signal Received Power, RSRP）/ Reference Signal Received Quality（Reference
Signal Received Quality, RSRQ）When meeting preset condition, the UE is to macro base station reporting measurement reports, wherein
The working frequency points and PCI of RSRP/RSRQ and small cell1 comprising small cell1 in this measurement report；
After step 12, macro base station receive the measurement report that UE is reported, the working frequency points and PCI that will be carried in the measurement report
As the neighborhood region correlation chart that search index locally preserves, due to including two adjacent cells to match in neighborhood region correlation chart, i.e.,
Small cell1 and small cell3, therefore can not identify the target adjacent section according to working frequency points and PCI, the macro base station to
UE sends measuring configuration order, to indicate that the UE reads target adjacent section（That is small cell1）E-UTRAN cell overall situation marks
Know（E-UTRAN Cell Global Identity, ECGI）.
After step 13, UE receive the measuring configuration order of macro base station transmission, the receiver of itself is adjusted to read small
The system broadcast information of cell1, and the ECGI of the small cell1 is obtained from the system broadcast information, again to macro base station
Reporting measurement reports, wherein include the ECGI of the small cell1 in this measurement report；
After step 14, macro base station receive the measurement report that UE is reported, since ECGI is the unique mark of cell, macro base station can
ECGI in the measurement report reported by UE identifies that the target adjacent section is small cell1, and then triggering following switches
Process.
As it can be seen that being layered in on-premise network in LTE isomeries, due to the presence of PCI confusion problem, base station cannot be reported according to UE
First measurement report in working frequency points and PCI carry out unique identification and go out target adjacent section, need UE to read adjacent cell to be
System broadcast message reports Article 2 measurement report to base station to obtain the ECGI of the adjacent cell, so that base station is surveyed according to this
ECGI in amount report comes unique identification target adjacent section.The mechanism of above-mentioned determining target adjacent section has the following problems：
UE is in fetching adjacent domain system broadcast message, it may be necessary to hundreds of milliseconds of even longer times, to increase
The delay that switching prepares；In addition, UE is in fetching adjacent domain system broadcast message, it is also possible to the temporary interrupting service data of meeting
Transmitting-receiving, to reduce user experience；
If measurement report is handover event triggering, if network side cannot execute the handoff procedure of UE in time, due to this
The current service cell signal decaying of UE, may result in call drop；
If UE movement speeds are very fast, above-mentioned signaling procedure is executed in network side（That is step 11 ~ step 14）It afterwards, just can be to UE
Switching command is sent out, UE may have moved out the coverage area of to be switched target adjacent section at this time, if UE still attempts to wait for this
The target adjacent section of switching switches, since link-quality is bad, it is likely that and lead to handover failure, that is, allows to complete switching,
It is easy to cause call drop, to reduce the mobility performance of network, also reduces user experience.
In conclusion in the prior art, the serving BS of UE determines the process for the Target cell that the UE is switched over, increase
The delay that switching prepares, and it is easy to cause call drop, to reducing user experience.
Invention content
An embodiment of the present invention provides a kind of method and apparatus of determining Target cell, for solving UE's in the prior art
Serving BS determines the process for the Target cell that the UE is switched over, the existing delay for increasing switching and preparing, and is easy to lead
Call drop is caused, the problem of to reduce user experience.
An embodiment of the present invention provides a kind of methods of determining Target cell, including：
Serving BS is after the measurement report that the user equipment (UE) for receiving own services is sent, from the neighboring BS relationship of itself
In each adjacent cell that table includes, search with the measurement report in include the UE report Target cell working frequency points and
The adjacent cell that PCI matches, and using the adjacent cell found as middle cell；
If finding at least two middle cells, the serving BS is corresponding according to each middle cell locally preserved
Include in first position information and the measurement report for indicating itself position is used to indicate that the UE is current
The second position information of position determines the Target cell from least two middle cell.
An embodiment of the present invention provides a kind of equipment of determining Target cell, including：
First processing module, for after the measurement report that the UE for receiving own services is sent, being closed from the adjacent area of itself
Be in each adjacent cell that table includes search with the working frequency points of the Target cell for the UE reports for including in the measurement report and
The adjacent cell that PCI matches, and using the adjacent cell found as middle cell；
Second processing module, for when the first processing module finds at least two middle cells, according to local
Include in the first position information for being used to indicate each middle cell position of preservation and the measurement report is used for
The second position information for indicating the UE present positions determines the target from least two middle cell
Cell.
Is there is PCI confusion in the embodiment of the present invention, the measurement report that the serving BS of UE can be reported according to UE
In include second position information, determine the UE report Target cell.To only need UE to report a measurement report, so that it may with
It is accurate to determine Target cell, to trigger switching set-up procedure, go the system broadcast information for reading adjacent cell to obtain again without UE
The ECGI of the adjacent cell reports the Article 2 measurement report of the ECGI comprising the adjacent cell without UE again, and it is accurate to reduce switching
Standby delay also reduces the call drop probability caused by delay is long, improves the performance of handoffs of network, in avoiding temporarily
The problem of only business datum is received and dispatched, and then improve user experience.
Description of the drawings
Fig. 1 is the method schematic diagram for solving PCI confusion in the prior art；
Fig. 2 is the method flow schematic diagram that the embodiment of the present invention determines Target cell；
Fig. 3 is the friendship for the first position information that serving cell is transmitted in two adjacent base stations of the first in the embodiment of the present invention
Mutual process schematic；
Fig. 4 is the friendship for the first position information that serving cell is transmitted in second of adjacent two base station in the embodiment of the present invention
Mutual process schematic；
Fig. 5 is the network topology schematic diagram of the embodiment of the present invention；
Fig. 6 is the method flow diagram that Target cell is determined under the first application scenarios of the embodiment of the present invention；
Fig. 7 is the method flow diagram that Target cell is determined under second of application scenarios of the embodiment of the present invention；
Fig. 8 is the method flow diagram that Target cell is determined under the third application scenarios of the embodiment of the present invention；
Fig. 9 is that the embodiment of the present invention determines the interaction schematic diagram between each equipment during Target cell；
Figure 10 is the structural schematic diagram for the equipment that the embodiment of the present invention determines Target cell.
Specific implementation mode
Is there is PCI confusion, the survey that serving BS can be reported according to the UE of own services in the embodiment of the present invention
The second position information for including in amount report, determines the Target cell of UE reports.To only need UE to report a measurement report,
Target cell can be accurately determined, to trigger switching set-up procedure.
Currently, in order to support to minimize drive test（Minisation ofDrive Test, MDT）Function, in standard criterion
In TS36.331, the measurement event of each triggering switching（Such as A3, A4, A5 and B1, B2）Measurement report in increase geographical position
Confidence ceases.It, will if UE can obtain available geographical location information when collecting measurement result according to the configuration of network side
The geographical location information carries in measurement report and is sent to network side.Wherein, geographical location information can be that the UE is current
The latitude and longitude information of position can also be the wireless signal fingerprint that the UE is currently measured（fingerprint）.
Further, latitude and longitude information can be by global positioning system（Global Positioning System, GPS）System
System provides, can also be by Global Navigation Satellite System（Global Navigation Satellite System, GNSS）System
It provides.
Further, wireless signal fingerprint includes the ginseng that the UE is currently able to the adjacent cell in addition to Target cell measured
It examines symbol and receives power（Reference Signal Received Power, RSRP）And/or the reference mark quality of reception
（Reference Signal Received Quality, RSRQ）.
The embodiment of the present invention is described in further detail with reference to the accompanying drawings of the specification.
Shown in Figure 2, the method for determining Target cell provided in an embodiment of the present invention includes the following steps：
Step 21, serving BS are after the measurement report that the UE for receiving own services is sent, from the neighboring BS relationship of itself
In each adjacent cell that table includes, the working frequency points and PCI with the Target cell for the UE reports for including in the measurement report are searched
The adjacent cell to match, and using the adjacent cell found as middle cell；
If step 22 finds at least two middle cells, serving BS is according to each middle cell pair locally preserved
Include in the first position information and the measurement report for indicating itself position answered is used to indicate that the UE is current
The second position information of position determines the Target cell of UE reports from least two middle cell.
In the embodiment of the present invention, in the measurement report that UE is reported comprising the UE report the corresponding information of Target cell and
Second position information；Wherein, the corresponding information of the Target cell includes the RSRP/RSRQ for the Target cell that UE is measured, is somebody's turn to do
The information such as the working frequency points of Target cell and PCI；
In the embodiment of the present invention, serving BS preserves each cell that each adjacent base station is controlled（That is adjacent cell）It is corresponding
The first position information of working frequency points and PCI, each cell；
Wherein, first position information is the latitude and longitude information of cell position, the latitude and longitude information can by GPS system or
GNSS system provides；
Further, the corresponding working frequency points of each adjacent cell and PCI are typically maintained in neighborhood region correlation chart；Each adjacent cell corresponds to
First position information can be stored in the neighborhood region correlation chart, can also be stored in it is local elsewhere.
Further, also include the corresponding ECGI of each cell, tracking area identification in serving BS neighborhood region correlation chart
（Tracking Area Identity, TAI）Etc. information.
In the embodiment of the present invention, the second position information for including in the measurement report is：The warp of the UE present positions
The wireless signal fingerprint that latitude information or the UE are currently measured；
It should be noted that since the UE wireless signal fingerprints currently measured include the UE removing of being currently able to measure
The RSRP and/or RSRQ of adjacent cell except Target cell, the i.e. RSRP and/or RSRQ of the peripheral cells UE therefore can bases
The wireless signal fingerprint that the UE is measured determines the cell adjacent with the UE, and then determines the position that the UE is currently located roughly.
Further, if finding a middle cell in step 21, this method further includes：
The middle cell is determined as the Target cell of UE reports by serving BS.
Further, after the Target cell that serving BS determines UE reports, this method further includes：
Target BS where from serving BS to the Target cell sends switching request, to trigger the handoff procedure of UE.
In the embodiment of the present invention, serving BS obtains each cell that each adjacent base station is controlled according to the following steps and corresponds to
First position information：
Serving BS is established interface with each adjacent base station respectively and is connect, and passes through interface signaling message with each adjacent base station
（It such as establishes request message and establishes response message）The corresponding first position information of each cell that interaction respectively controls；
Serving BS receives each cell that this base station that each adjacent base station is sent is controlled by the interface signaling message
Corresponding first position information, and by the first position information storage received to locally.
Correspondingly, each adjacent base station receives each of itself control that serving BS is sent by the interface signaling message
The corresponding first position information of cell, and by the first position information storage received to locally；And pass through the interface signaling
Message sends the corresponding first position information of each cell itself controlled to serving BS.
Further, serving BS sends the corresponding first position letter of each cell of itself control by interface signaling message
While breath, the corresponding working frequency points of each cell and PCI, ECGI, tracking area code are also sent（TrackingArea Code,
TAC）Equal configuration informations；
Adjacent base station sends the same of the corresponding first position information of each cell of itself control by interface signaling message
When, also send the configuration informations such as the corresponding working frequency points of each cell and PCI, ECGI, TAC.
Preferably, the interface that serving BS is established with each adjacent base station is connected as X2 interface.
Below by taking X2 interface as an example, adjacent to the embodiment of the present invention two base stations（That is eNB1 and eNB2）It is small to transmit service
The first position information in area illustrates, and shown in Figure 3, interactive process includes the following steps：
Step 31, eNB1 send X2 to eNB2 and establish request（X2Setup Request）Message, and establish and ask in the X2
Each cell of itself control is carried in message（That is local service cell）Corresponding ECGI, PCI, working frequency points, TAC, first
The information such as location information；
Step 32, eNB2 are after receiving X2 and establishing request message, in each cell pair that locally preservation eNB1 is controlled
The configuration informations such as ECGI, PCI, working frequency points, TAC, the first position information answered, and send X2 to eNB2 and establish response
（X2Setup Response）Message, and each cell that carries itself control is established in the X2 in response message（I.e. local clothes
Business cell）The configuration informations such as corresponding ECGI, PCI, working frequency points, TAC, first position information.
In the embodiment of the present invention, if any cell update that serving BS the is controlled working frequency points of itself, PCI and
One or more of one location information information, this method further include：
Updated configuration information is sent to each adjacent base station by serving BS by interface signaling message.
Correspondingly, adjacent base station receives the updated configuration information that serving BS is sent by interface signaling message, and
Update the configuration information of the serving BS locally preserved.
In the embodiment of the present invention, if any cell update that any adjacent base station the is controlled working frequency points of itself, PCI
And one or more of first position information configuration information, this method further include：
Updated configuration information is sent to serving BS by the adjacent base station by interface signaling message.
Correspondingly, serving BS receives the updated configuration information of adjacent base station transmission by interface signaling message,
And update the configuration information of the adjacent base station locally preserved.
Preferably, which is base station configuration updating（eNB Configuration Update）Message and base
Configuration of standing updates response（eNB Configuration Update ACK）Message.
Below using interface signaling message as base station configuration updating（eNB Configuration Update）Message, to this hair
Two adjacent base stations of bright embodiment（That is eNB1 and eNB2）The first position information for transmitting serving cell illustrates, referring to figure
Shown in 4, interactive process includes the following steps：
If some cell that step 41, eNB1 are controlled（That is some serving cell）Configuration information（Such as ECGI, PCI, work
Make one or more of frequency point, TAC, first position information configuration information）Changed, eNB1 sends base station to eNB2 and matches
Set update（eNB Configuration Update）Message, and the updated clothes are carried in the base station configuration updating information
The configuration information for cell of being engaged in；
Step 42, eNB2 update the configuration information of the eNB1 locally preserved after receiving the base station configuration updating information,
And return to base station configuration updating response to eNB1（eNB Configuration Update ACK）Message, to complete this configuration
Update.
In the embodiment of the present invention, each base station（That is the adjacent base of the serving BS or the serving BS of the embodiment of the present invention
It stands）The first position information of each cell of itself control is obtained in the following manner：
Mode 1, base station pass through Operation and Maintenance（Operation And Maintenance, OAM）System obtains itself control
The corresponding first position information of each cell, wherein when disposing base station, which configures this base station by base station and controls
The corresponding first position information of each cell of system；
Mode 2, base station obtain the corresponding first position of each cell of itself control by the positioning device that itself is configured
Information.
In the embodiment of the present invention, however, it is determined that go out at least two middle cells, serving BS determines that the target of UE reports is small
Area includes following two methods：
The second position information for including in the measurement report that method A, UE reports is the longitude and latitude of the UE present positions
Information, this approach includes the following steps：
Serving BS according to the corresponding first position information of the second position information and at least two middle cell,
Determine the distance between the UE and each middle cell value；And
The minimum corresponding middle cell of distance value is determined as Target cell by serving BS, or will be less than the of setting
The corresponding middle cell of distance value of one threshold value is determined as Target cell；
Wherein, the first threshold value set can be set as needed as empirical value.
Under this method, serving BS is small by the second position information of the UE provided in measurement report and the centre that locally preserves
The corresponding first position information in area is compared, and will be determined as Target cell with the immediate middle cells UE.
The second position information for including in the measurement report that method B, UE reports is the wireless signal that the UE is currently measured
Fingerprint, this method include further following two methods again：
Method B1, this approach includes the following steps：
Serving BS determines small in this base station range according to the first position information of each adjacent cell locally preserved
Area's Overlay Topology figure, wherein the relative position relation of any two adjacent cell is contained in the MPS process topological diagram；
The wireless signal fingerprint that serving BS includes according to the measurement report that UE is reported determines the cell adjacent with the UE；
And
Serving BS is small by centre adjacent with all adjacent cells of the determining UE in the MPS process topological diagram
Area is determined as Target cell.
Method B2, this approach includes the following steps：
The wireless signal fingerprint that serving BS includes according to the measurement report that UE is reported determines adjacent with the UE small
Area；And
The distance between all adjacent cells with the UE are worth the centre for the second threshold value for being respectively less than setting by serving BS
Cell is determined as Target cell；
Wherein, the second threshold value set can be set as needed as empirical value.
With reference to several concrete application scenes, the method for the embodiment of the present invention is described in detail.
Embodiment 1 assumes macrocell A（macro cell A）Coverage area in dispose 5 cells, i.e. small
Cell1 ~ small cell5, network topology are shown in Figure 5, wherein small cell1 have identical with small cell3
Working frequency points and PCI, and the PCI of other cells is all different.In the present embodiment, each base station employing mode 1 obtains itself
The first position information of each cell of control, and the latitude and longitude information that second position information is the positions UE；The present embodiment
The macro base station of offer determines the process of Target cell, shown in Figure 6, includes the following steps：
Step 61, macro base station A obtain the first position information of each cell of itself control and small base station obtains itself control
The first position information of each cell of system；
Specifically, operator is in deployment macro base station A（Base station i.e. where macrocell A）When, it is configured with macro cell A
First position information；And operator is disposing small base station（Base station i.e. where cell）When, each small base station control of configuration
The first position information of small cell1 ~ small cell5；
Wherein, first position information is the latitude and longitude information of cell position.
Step 62, macrocell A pass through Automatic Neighboring Relation（Automatic Neighbor Relation, ANR）Function,
Determine the small cell1 ~ small cell5 disposed in its coverage area；
Step 63, macro base station A establish interface with the small base station where small cell1 ~ small cell5 respectively and connect,
And the first position information for the cell that interaction respectively controls in the signaling message for establishing connection；
Specifically, macro base station A establishes in request message each macrocell for carrying itself and controlling what is sent to each small base station
Corresponding first position information；
Correspondingly, each cell for carrying itself and controlling is established in response message in each small base station what is returned to macro base station A
Corresponding first position information.
Preferably, the interface that macro base station A is established with the small base station where small cell1 ~ small cell5 respectively is connect
For X2 interface.
Further, macro base station A is also carrying each macro small of itself control to each establishing in request message for small base station transmission
The information such as the corresponding working frequency points in area, PCI, ECGI and TAI；
Each small base station is corresponding in each small cell that establishing of being returned to macro base station A also carries in response message and respectively control
The information such as working frequency points, PCI, ECGI and TAI.
Step 64, macro base station A are locally preserving the corresponding first position information of small cell1 ~ small cell5；
Further, if each small base station establishing of being returned to macro base station A also carried in response message respectively control it is each small
The information such as the corresponding working frequency points of cell, PCI, ECGI and TAI, then macro base station A stored respectively in local neighborhood region correlation chart
The configuration informations such as the corresponding working frequency points of small cell1 ~ small cell5, PCI, ECGI and TAI.
Step 65, macro base station A receive the measurement report that the UE of own services is reported；
Wherein, which includes the Target cell that the UE is measured（The present embodiment is using small cell3 as target
For cell）Signal strength（Such as RSRP/RSRQ）, the working frequency points and PCI and the UE corresponding second of the Target cell
Location information；
Step 66, macro base station A determine the Target cell of UE reports；Specifically：
First, the neighbour that macro base station A locally preserves the working frequency points for including in the measurement report and PCI as index search
Cell relation table finds the middle cell to match there are two, i.e. small cell1 and smallcell3；
Then, macro base station A is by comparing the second position information for including in the measurement report and two middle cells
Corresponding first position information determines that the distance between the UE and small cell3 are minimum, then macro base station A determines small
Cell3 is the Target cell of UE reports.
Small base station where step 67, from macro base station A to small cell3 sends switching request message, accurate with triggering switching
Standby process.
Embodiment 2, still by taking network topology shown in fig. 5 as an example, the present embodiment is similar to Example 1, unlike：This reality
The first position information that macro base station A employing modes 1 in example obtain each cell of itself control is applied, and adjacent with macro base station A
Each small base station employing mode 2 obtain itself control each cell first position information；
Specifically, operator is in deployment macro base station A（Base station i.e. where macrocell A）When, it is configured with macro cell A
First position information；Each small base station gets the first of the small cell of itself control by the positioning device of itself
Location information.
Embodiment 3, still by taking network topology shown in fig. 5 as an example, in the present embodiment, small eNB1 are built with macro base station A
Interface connection is stood（Such as X2 interface）, later the serving cell small cell1 of small eNB1 change itself match confidence
Breath（PCI such as PCI, and after changing is just identical as the PCI of small cell3）；Macro base station determines that target is small in the present embodiment
The process in area, it is shown in Figure 7, include the following steps：
Step 71, small eNB1 carry small to macro base station A transmission interface signaling messages in the interface signaling message
The updated configuration informations of cell1；
Wherein, configuration information includes configuration parameter（The configuration parameter includes working frequency points and PCI, ECGI, TAC etc.）And the
One location information；
Step 72, macro base station A are updated and are preserved in local neighborhood region correlation chart after receiving the interface signaling message
The first position letter of the corresponding PCI of small cell1, working frequency points, ECGI, TAI and the small cell1 locally preserved
The configuration informations such as breath；
Step 73, macro base station A receive the measurement report that the UE of own services is reported, wherein including in the measurement report should
The Target cell that UE is measured（The present embodiment is small cell1）RSRP/RSRQ, the PCI and working frequency points of Target cell,
And the corresponding second position information of the UE.
Step 74, macro base station A determine the Target cell of UE reports；It specifically includes：
First, the neighbour that macro base station A locally preserves the working frequency points for including in the measurement report and PCI as index search
Cell relation table finds the middle cell to match there are two, i.e. small cell1 and small cell3；
Then, macro base station A is by comparing the second position information for including in the measurement report and two middle cells
Corresponding first position information determines that the distance between the UE and small cell1 are minimum, then macro base station A determines small
Cell1 is the Target cell of UE reports.
Base station where step 75, from macro base station A to small cell1（small eNB1）Switching request message is sent, with
Triggering switching set-up procedure.
Embodiment 4, still by taking the network architecture shown in fig. 5 as an example, in the present embodiment, second position information is that UE is currently measured
The wireless signal fingerprint arrived；Macro base station determines the process of Target cell in the present embodiment, shown in Figure 8, includes the following steps：
Step 81, macro base station A obtain the first position information of each cell of itself control and small base station obtains itself control
The first position information of each cell of system；
Specifically, operator is in deployment macro base station A（Base station i.e. where macrocell A）When, it is configured with macro cell A
First position information；Each small base station gets first of the small cell of itself control by the positioning device of itself
Confidence ceases or operator is disposing small base station（Base station i.e. where cell）When configure the small of each small base station control
The first position information of cell1 ~ small cell5；
Wherein, first position information is the latitude and longitude information of cell position.
Step 82, macrocell A determine the small cell1 ~ small disposed in its coverage area by ANR functions
cell5；
Step 83, macro base station A establish interface with the small base station where small cell1 ~ small cell5 respectively and connect,
And the first position information for the cell that interaction respectively controls in the signaling message for establishing connection；
Specifically, macro base station A establishes in request message each macrocell for carrying itself and controlling what is sent to each small base station
Corresponding first position information；
Correspondingly, each cell for carrying itself and controlling is established in response message in each small base station what is returned to macro base station A
Corresponding first position information.
Step 84, macro base station A are locally preserving the corresponding first position information of small cell1 ~ small cell5；
Further, if each small base station establishing of being returned to macro base station A also carried in response message respectively control it is each small
The information such as the corresponding working frequency points of cell, PCI, ECGI and TAI, then macro base station A stored respectively in local neighborhood region correlation chart
The configuration informations such as the corresponding working frequency points of small cell1 ~ small cell5, PCI, ECGI and TAI.
Step 85, macro base station determine itself covering model according to the first position information of each small cell got
Enclose interior MPS process topological diagram；
Step 86, macro base station A receive the measurement report that the UE of own services is reported；
Wherein, the signal strength of the UE Target cells measured is included in the measurement report（That is RSRP/RSRQ）, the mesh
The wireless signal fingerprint that the corresponding PCI of mark cell and working frequency points and the UE are currently measured（I.e. adjacent with the UE is each small
The RSRP/RSRQ in area）, it is assumed that small cell2 and the small cell5 that UE is measured are contained in the wireless signal fingerprint
Corresponding RSRP/RSRQ；
Step 87, macro base station A determine the Target cell of UE reports；Specifically：
First, the neighbour that macro base station A locally preserves the working frequency points for including in the measurement report and PCI as index search
Cell relation table finds the middle cell to match there are two, i.e. small cell1 and small cell3；
Then, macro base station A determines the rough position of UE by comparing the wireless signal fingerprint in measurement report, specifically
's：Due to containing the signal of small cell2 and small cell5 in wireless signal fingerprint, macro base station A can be with
Determine that the cell adjacent with the UE is small cell2 and small cell5（That is macro base station A can determine the UE in small
Around cell2 and small cell5）；The MPS process topological diagram that macro base station A is determined according to step 85 is it is found that and small
Middle cell adjacent cell2 and small cell5 is small cell3, so that it is determined that small cell3 are that target is small
Area；
Small base station where step 88, macro base station A to small cell3（small eNB3）Switching request message is sent, with
Triggering switching set-up procedure.
The interaction between target BS where the Target cell that the serving BS to UE, the UE and the UE are reported below
It illustrates, it is shown in Figure 9, it is assumed that the serving BS of the UE is eNB1, target BS eNB2；Its interactive process is as follows：
Step 91, eNB1 interact the first position information of respective serving cell with eNB2 by interface signaling message；
Step 92, UE itself provide the eNB1 transmission measurement reports of service to currently, wherein include in the measurement report
The PCI and working frequency points and second position information of Target cell；
Step 93, eNB1 determine that the target of UE reports is small according to the neighborhood region correlation chart itself preserved and the measurement report
Area；
Specifically, first using PCI and working frequency points in measurement report as index in the neighborhood region correlation chart locally preserved
It is searched；If finding at least two middle cells, then by second position information and each middle cell locally preserved
First position information be compared, with from least two middle cell determine Target cell；
ENB2 triggering switchings where step 94, from eNB1 to the Target cell prepare.
Above method process flow can realize that the software program can be stored in a storage medium with software program, when
When the software program of storage is called, above method step is executed.
Based on same inventive concept, a kind of equipment of determining Target cell is additionally provided in the embodiment of the present invention, due to this
The principle that equipment solves the problems, such as is similar to the above-mentioned method of determining Target cell, therefore the implementation of the equipment may refer to method
Implement, overlaps will not be repeated.
It is shown in Figure 10, a kind of equipment of determining Target cell provided in an embodiment of the present invention, including：
First processing module 101, for receive own services UE send measurement report after, from the adjacent area of itself
In each adjacent cell that relation table includes, search with the measurement report in include the UE report Target cell working frequency points and
The adjacent cell that PCI matches, and using the adjacent cell found as middle cell；
Second processing module 102, for when first processing module 101 finds at least two middle cells, according to this
In the corresponding first position information and the measurement report for indicating itself position in each middle cell that ground preserves
Including for indicating that the second position information of the UE present positions determines mesh from least two middle cell
Mark cell.
As a kind of realization method, if second position information is the latitude and longitude information of the UE present positions, at second
Reason module 102 is specifically used for：
According to the corresponding first position letter of second position information and at least two middle cell in measurement report
Breath, determines the distance between the UE and each middle cell value；And the minimum corresponding middle cell of distance value is determined as
Target cell, or the corresponding middle cell of distance value less than the first threshold value of setting is determined as Target cell.
As another realization method, if second position information is the wireless signal fingerprint that the UE is currently measured, this
Two processing modules 102 are specifically used for：
According to the first position information of each adjacent cell locally preserved, determine that the MPS process in this base station range is opened up
Flutter figure；The wireless signal fingerprint for including according to measurement report determines the cell adjacent with the UE；And it will be in MPS process topology
The middle cell adjacent with all adjacent cells of the determining UE is determined as Target cell in figure.
As another realization method, if second position information is the wireless signal fingerprint that the UE is currently measured, second
Processing module 102 is specifically used for：
The wireless signal fingerprint for including according to measurement report determines the cell adjacent with the UE；And by the institute with the UE
There is the middle cell that the distance between adjacent cell value is respectively less than the second threshold value set to be determined as Target cell.
Further, which further includes：
Information exchange module 103 is connect for establishing interface with each adjacent base station respectively, and with each adjacent base station by connecing
The corresponding first position information of each cell that message enables interacting message respectively control；And it is received by interface signaling message each
The corresponding first position information of each cell for itself control that adjacent base station is sent, and the first position information received is deposited
It stores up to local.
Further, information exchange module 103 is additionally operable to：
One or more in determining any cell update of itself control working frequency points, PCI and first position information
After a configuration information, updated configuration information is sent to by each adjacent base station by interface signaling message；And pass through interface
Signaling message receives the updated configuration information that any adjacent base station is sent, and updates matching for the adjacent base station locally preserved
Confidence ceases.
Preferably, the interface that serving BS is established with each adjacent base station respectively is connected as X2 interface.
Further, which further includes：
Data obtaining module 104, the corresponding first position information of each cell for obtaining itself control；
Further, which further includes：
Third processing module 105, after Target cell is determined in Second processing module 102, to the Target cell
The target BS at place sends switching request, to trigger the handoff procedure of UE.
Is there is PCI confusion in the embodiment of the present invention, the measurement report that the serving BS of UE can be reported according to UE
In include second position information, determine the UE report Target cell.To only need UE to report a measurement report, so that it may with
It is accurate to determine Target cell, to trigger switching set-up procedure, go the system broadcast information for reading adjacent cell to obtain again without UE
The ECGI of the adjacent cell reports the Article 2 measurement report of the ECGI comprising the adjacent cell without UE again, and it is accurate to reduce switching
Standby delay also reduces the call drop probability caused by delay is long, improves the performance of handoffs of network, in avoiding temporarily
The problem of only business datum is received and dispatched, and then improve user experience.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, the present invention can be used in one or more wherein include computer usable program code computer
Usable storage medium（Including but not limited to magnetic disk storage, CD-ROM, optical memory etc.）The computer program of upper implementation produces
The form of product.
The present invention be with reference to according to the method for the embodiment of the present invention, equipment（System）And the flow of computer program product
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
Instruct the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine so that the instruction executed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (17)
1. a kind of method of determining Target cell, which is characterized in that this method includes：
Serving BS is after the measurement report that the user equipment (UE) for receiving own services is sent, from the neighborhood region correlation chart packet of itself
In each adjacent cell contained, the working frequency points and PCI phases with the Target cell for the UE reports for including in the measurement report are searched
Matched adjacent cell, and using the adjacent cell found as middle cell；
If finding at least two middle cells, the serving BS is used for according to each middle cell locally preserved is corresponding
Indicate itself position first position information and the measurement report in include for indicating that the UE is currently located
The second position information of position determines the Target cell from least two middle cell；
Wherein, the second position information is：The latitude and longitude information of the UE present positions or the UE are currently measured
Wireless signal fingerprint；
The first position information is the latitude and longitude information of cell position；
Wherein, the wireless signal fingerprint includes the adjacent cell in addition to the Target cell that the UE is currently able to measure
Reference mark receive power RSRP and/or reference mark quality of reception RSRQ.
2. the method as described in claim 1, which is characterized in that if the second position information is the UE present positions
Latitude and longitude information, the serving BS determines the Target cell, further comprises：
The serving BS is according to the corresponding first position of the second position information and at least two middle cell
Information determines the distance between the UE and each middle cell value；
The minimum corresponding middle cell of distance value is determined as the Target cell by the serving BS, or will be less than setting
The corresponding middle cell of distance value of the first threshold value be determined as the Target cell.
3. the method as described in claim 1, which is characterized in that if the second position information UE is currently measured
Wireless signal fingerprint, the serving BS determine the Target cell, further comprise：
The serving BS determines small in this base station range according to the first position information of each adjacent cell locally preserved
Area's Overlay Topology figure；
The wireless signal fingerprint that the serving BS includes according to the measurement report determines the cell adjacent with the UE；With
And
The serving BS by the MPS process topological diagram with all adjacent cells of the determining UE it is adjacent in
Between cell be determined as Target cell.
4. the method as described in claim 1, which is characterized in that if the second position information UE is currently measured
Wireless signal fingerprint, the serving BS determine the Target cell, further comprise：
The wireless signal fingerprint that the serving BS includes according to the measurement report determines the cell adjacent with the UE；With
And
The distance between all adjacent cells with the UE are worth in the second threshold value for being respectively less than setting by the serving BS
Between cell be determined as Target cell.
5. such as Claims 1 to 4 any one of them method, which is characterized in that the serving BS is obtained according to the following steps
First position information corresponding with each cell that each adjacent base station is controlled：
The serving BS is established interface with each adjacent base station respectively and is connect, and is handed over by interface signaling message with each adjacent base station
The corresponding first position information of each cell mutually respectively controlled；
The serving BS receives each cell pair for itself control that each adjacent base station is sent by the interface signaling message
The first position information answered, and by the first position information storage received to locally.
6. method as claimed in claim 5, which is characterized in that the method further includes：
Any adjacent base station is in determining any cell update of itself control working frequency points, PCI and first position information
After one or more configuration informations, updated configuration information is sent to by the service base by the interface signaling message
It stands；And the updated configuration information that the serving BS is sent is received by the interface signaling message, and update local
The configuration information of the serving BS preserved；And/or
The serving BS is in determining any cell update of itself control working frequency points, PCI and first position information
After one or more configuration informations, updated configuration information is sent to by each adjacent base station by the interface signaling message；
And the updated configuration information that any adjacent base station is sent is received by the interface signaling message, and update local preservation
The adjacent base station configuration information.
7. method as claimed in claim 5, which is characterized in that the interface that the serving BS is established with each adjacent base station respectively
It is connected as X2 interface.
8. such as Claims 1 to 4 any one of them method, which is characterized in that each base station obtains itself in the following manner
The corresponding first position information of each cell of control：
The base station obtains the corresponding first position information of each cell of itself control by Operation and Maintenance OAM systems, wherein
When disposing base station, the OAM systems configure the corresponding first position of each cell that this base station controls by the base station and believe
Breath；Or
The base station obtains the corresponding first position information of each cell of itself control by the positioning device that itself is configured；
Wherein, the base station is the adjacent base station of the serving BS or the serving BS.
9. the method as described in claim 1, which is characterized in that after the serving BS determines the Target cell, institute
The method of stating further includes：
Target BS where from the serving BS to the Target cell sends switching request, to trigger the switching of the UE
Journey.
10. a kind of equipment of determining Target cell, which is characterized in that the equipment includes：
First processing module, for receive own services UE send measurement report after, from the neighborhood region correlation chart of itself
Including each adjacent cell in, search with the measurement report in include the UE report Target cell working frequency points and PCI
The adjacent cell to match, and using the adjacent cell found as middle cell；
Second processing module, for when the first processing module finds at least two middle cells, according to local preservation
First position information for indicating each middle cell position and the measurement report in include for indicating
The second position information of the UE present positions determines the Target cell from least two middle cell；
Wherein, the second position information is：The latitude and longitude information of the UE present positions or the UE are currently measured
Wireless signal fingerprint；
The first position information is the latitude and longitude information of cell position；
Wherein, the wireless signal fingerprint includes the adjacent cell in addition to the Target cell that the UE is currently able to measure
Reference mark receive power RSRP and/or reference mark quality of reception RSRQ.
11. equipment as claimed in claim 10, which is characterized in that if the second position information, which is the UE, is currently located position
The latitude and longitude information set, the Second processing module are specifically used for：
According to the corresponding first position information of the second position information and at least two middle cell, determine described in
The distance between UE and each middle cell are worth；And that the minimum corresponding middle cell of distance value is determined as the target is small
Area, or the corresponding middle cell of distance value less than the first threshold value of setting is determined as the Target cell.
12. equipment as claimed in claim 10, which is characterized in that currently measured if the second position information is the UE
Wireless signal fingerprint, the Second processing module is specifically used for：
According to the first position information of each adjacent cell locally preserved, the MPS process topology in this base station range is determined
Figure；The wireless signal fingerprint for including according to the measurement report determines the cell adjacent with the UE；And it will be in the cell
The middle cell adjacent with all adjacent cells of the determining UE is determined as Target cell in Overlay Topology figure.
13. equipment as claimed in claim 10, which is characterized in that currently measured if the second position information is the UE
Wireless signal fingerprint, the Second processing module is specifically used for：
The wireless signal fingerprint for including according to the measurement report determines the cell adjacent with the UE；And it will be with the UE
The distance between all adjacent cells value be respectively less than the middle cell of the second threshold value set and be determined as Target cell.
14. such as claim 10~13 any one of them equipment, which is characterized in that the equipment further includes：
Information exchange module is connect for establishing interface with each adjacent base station respectively, and passes through interface signaling with each adjacent base station
The corresponding first position information of each cell that interacting message respectively controls；And each phase is received by the interface signaling message
The corresponding first position information of each cell for itself control that adjacent base station is sent, and the first position information storage that will be received
To local.
15. equipment as claimed in claim 14, which is characterized in that described information interactive module is additionally operable to：
Match in one or more of any cell update working frequency points, PCI and the first position information for determining itself control
After confidence breath, updated configuration information is sent to by each adjacent base station by the interface signaling message；And by described
Interface signaling message receives the updated configuration information that any adjacent base station is sent, and updates the adjacent base station locally preserved
Configuration information.
16. such as claim 10~13 any one of them equipment, which is characterized in that the equipment further includes：
Data obtaining module, the corresponding first position information of each cell for obtaining itself control.
17. equipment as claimed in claim 10, which is characterized in that the equipment further includes：
Third processing module, after the Target cell is determined in the Second processing module, to the Target cell
The target BS at place sends switching request, to trigger the handoff procedure of the UE.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9572115B2 (en) * | 2014-12-04 | 2017-02-14 | Telefonaktiebolaget Lm Ericsson (Publ) | Measurement report triggering for inter-cell coordination in cellular deployment |
| CN106550418A (en) * | 2015-09-22 | 2017-03-29 | 华为技术有限公司 | A kind of decision method and device of cell switching |
| CN107493593A (en) * | 2016-06-13 | 2017-12-19 | 中国移动通信有限公司研究院 | A kind of cell switching method, device, relevant device and system |
| CN107580337B (en) * | 2016-07-05 | 2022-05-13 | 中兴通讯股份有限公司 | Hot spot area identification method and device |
| CN107864481B (en) * | 2016-09-22 | 2022-08-16 | 中兴通讯股份有限公司 | Neighbor cell optimization method, device and base station |
| CN107995650B (en) * | 2016-10-26 | 2021-06-18 | 中国移动通信集团广东有限公司 | Method and device for acquiring neighbor cell identifier |
| CN108632740B (en) * | 2017-03-20 | 2020-12-11 | 中国移动通信集团湖北有限公司 | Positioning method and device of user equipment |
| CN107991648B (en) * | 2017-11-28 | 2019-10-11 | 中国联合网络通信集团有限公司 | A kind of the search and rescue localization method and device of disaster affected people |
| CN110392406B (en) * | 2018-04-20 | 2023-05-12 | 上海诺基亚贝尔股份有限公司 | Method, apparatus and computer readable medium for handover in a communication system |
| CN110876161B (en) * | 2018-08-31 | 2023-04-18 | 中兴通讯股份有限公司 | Cell discovery method, device and computer readable storage medium |
| CN111356142B (en) * | 2018-12-21 | 2023-04-11 | 中兴通讯股份有限公司 | Service processing method and device |
| CN111417143B (en) * | 2019-01-07 | 2023-01-13 | 中国移动通信有限公司研究院 | Cell reporting method and network equipment |
| CN110351713B (en) * | 2019-08-21 | 2022-10-28 | 北京百度网讯科技有限公司 | Method and device for processing information |
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