CN103945469A - Target cell determining method and device - Google Patents
Target cell determining method and device Download PDFInfo
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- CN103945469A CN103945469A CN201310017826.4A CN201310017826A CN103945469A CN 103945469 A CN103945469 A CN 103945469A CN 201310017826 A CN201310017826 A CN 201310017826A CN 103945469 A CN103945469 A CN 103945469A
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Abstract
The embodiment of the invention discloses a target cell determining method and device. The problems of long switching preparation delay and easy dropping in the prior art are solved. The method provided by the embodiment of the invention comprises the steps that after a service base station receives a measurement report sent by UE served by the service base station, the service base station searches adjacent cells matching the work frequency point and PCI of a target cell of a UE report in the measurement report from the adjacent cell relationship table, and takes the found adjacent cells as intermediate cells; and if at least two intermediate cells are found, according to first position information corresponding to each intermediate cell locally saved and second position information in the measurement report, the target cell of the UE report is determined from at least two intermediate cells. According to the embodiment of the invention, the UE simply needs to report the measurement report, and the target cell can be accurately determined; the switching preparation delay is reduced; and the probability of dropping caused by too long delay is reduced.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of method and apparatus of definite Target cell.
Background technology
Long Term Evolution (Long Term Evolution, LTE) in the isomery layering on-premise network of system, macrocell (macro cell) layer likely there will be overlapping covering with small-cell (small cell) layer,, in the coverage of this macrocell, may dispose small-cell simultaneously.So-called small-cell refers to the community that transmitting power provides lower than the low power base station of common macro base station, and for example, picocell (pico cell), Femto cell (femto cell) etc. are typical small-cells.
The physical layer of LTE system has defined 504 Physical Cell Identifier (Physical Cell Identifier altogether, PCI), for fear of presence of intercell interference, and make base station (eNB) can correctly identify each adjacent cell, PCI configuration needs to meet following two requirements:
The one, do not conflict (collision-free), identical PCI all can not be used in any two adjacent co-frequency cells, and identical PCI can not be used in all co-frequency cells in same eNB;
The 2nd, do not obscure (confusion-free), in all adjacent cells of Ji Yige community, can not there be any two co-frequency cells to use identical PCI.
In the non-isomery on-premise network of LTE, the adjacent cell quantity of macrocell is more limited, far fewer than 504, the problem that can avoid PCI conflict or obscure by the network planning or aspect of network self-configuration function, therefore, in the non-isomery on-premise network of LTE, the problem that conventionally there will not be PCI conflict or obscure.But, in LTE isomery layering on-premise network, in order to improve frequency spectrum utilization rate, small-cell works in same frequency layer conventionally, if the quantity of the small-cell in a macrocell coverage area surpasses 504, must cause having working frequency points and the identical situation of PCI of two small-cells; Even if the quantity of the small-cell in this macrocell coverage area does not reach 504, but typically use owing to controlling the base station of small-cell the PCI that self-configuration function configures small-cell, therefore, be that two different slight PCI conflicts or confusion region configure the probability of identical PCI also higher.
In handoff procedure, macro base station is measured configuration to subscriber equipment (UE), and UE carries out and measures according to the measurement configuration information of receiving, and measurement report is reported to macro base station, and this measurement report carries out switch decision for auxiliary macro base station; Wherein, in measurement report, normally with the working frequency points of community and the combination of PCI, identify an adjacent cell.At present, for the problem that solves PCI conflict or obscure, the network architecture shown in Figure 1, supposes that small cell1 and small cell3 work in same frequency layer and use identical PCI, the following mechanism of available technology adopting solves PCI conflict or obscures, and comprises the following steps:
The UE of step 11, macrocell service measures the signal of small-cell around, Reference Signal Received Power (Reference Signal Received Power as small cell1, RSRP)/Reference Signal Received Quality (Reference Signal Received Quality, while RSRQ) meeting default condition, this UE is to macro base station reporting measurement reports, wherein, the RSRP/RSRQ that comprises small cell1 in this measurement report and working frequency points and the PCI of small cell1;
Step 12, macro base station are received after the measurement report that UE reports, the local neighborhood region correlation chart of preserving using the working frequency points of carrying in this measurement report and PCI as search index, owing to comprising two adjacent cells that match in neighborhood region correlation chart, be small cell1 and small cell3, therefore cannot identify this target adjacent section according to working frequency points and PCI, this macro base station sends and measures configuration order to UE, to indicate this UE to read the E-UTRAN community overall identification (E-UTRAN Cell Global Identity, ECGI) of target adjacent section (being small cell1).
Step 13, UE receive after the measurement configuration order of macro base station transmission, adjust the receiver of self to read the system broadcast information of small cell1, and from this system broadcast information, obtain the ECGI of this small cell1, again to macro base station reporting measurement reports, wherein, the ECGI that comprises this small cell1 in this measurement report;
Step 14, macro base station receive that after the measurement report that UE reports,, because ECGI is the unique identification of community, it is small cell1 that the ECGI in the measurement report that macro base station can report by UE identifies this target adjacent section, and then triggering following handoff procedure.
Visible, in LTE isomery layering on-premise network, because PCI obscures the existence of problem, working frequency points in article one measurement report that base station can not report according to UE and PCI come unique target adjacent section of identifying, need system broadcast message that UE reads adjacent cell to obtain the ECGI of this adjacent cell, and report second measurement report to base station, so that unique identification target adjacent section is come according to the ECGI in this measurement report in base station.There is following problem in the mechanism of above-mentioned definite target adjacent section:
UE, when fetching adjacent domain system broadcast message, may need the even longer time of hundreds of millisecond, thereby increased, switches the time delay of preparing; In addition, UE when fetching adjacent domain system broadcast message, the also temporarily transmitting-receiving of interrupting service data, thus reduced user's experience;
If when measurement report is handover event triggering, if network side can not be carried out the handoff procedure of UE in time, the current service cell signal attenuation due to this UE, may cause call drop;
If UE translational speed is very fast, at network side, carry out above-mentioned signaling procedure (after being step 11 ~ step 14), just can send switching command to UE, now UE may shift out the coverage of to be switched target adjacent section, if UE still attempts switching to this to be switched target adjacent section, because link-quality is bad, probably cause handoff failure, allowed to switching, also easily cause call drop, thereby the mobility performance that has reduced network, has also reduced user's experience.
In sum, in prior art, the serving BS of UE is determined the process of the Target cell that this UE switches, and has increased and has switched the time delay of preparing, and easily caused call drop, thereby reduced user's experience.
Summary of the invention
The embodiment of the present invention provides a kind of method and apparatus of definite Target cell, for solving the serving BS of prior art UE, determine the process of the Target cell that this UE switches, the increase existing switch the time delay of preparing, and easily cause call drop, thereby reduced the problem that user experiences.
The embodiment of the present invention provides a kind of method of definite Target cell, comprising:
Serving BS is after receiving the measurement report of the user equipment (UE) transmission of self serving, from each adjacent cell that self neighborhood region correlation chart comprises, search with described measurement report in the working frequency points of Target cell of this UE report of comprising and the adjacent cell that PCI matches, and using the adjacent cell finding as middle community;
If community in the middle of finding at least two, described serving BS according to this locality, preserve each in the middle of community corresponding for represent that the primary importance information of self position and described measurement report comprise for representing the second place information of the current position of described UE, in the middle of described at least two, community, determine described Target cell.
The embodiment of the present invention provides a kind of equipment of definite Target cell, comprising:
The first processing module, for after receiving the measurement report of the UE transmission of self serving, from each adjacent cell that self neighborhood region correlation chart comprises, search with described measurement report in the working frequency points of Target cell of this UE report of comprising and the adjacent cell that PCI matches, and using the adjacent cell finding as middle community;
The second processing module, be used for when described the first processing module finds at least two middle communities, according to this locality, preserve for represent that the primary importance information of position, community in the middle of each and described measurement report comprise for representing the second place information of the current position of described UE, in the middle of described at least two, community, determine described Target cell.
The embodiment of the present invention is occurring that PCI obscures in situation, and the second place information comprising in the measurement report that the serving BS of UE can report according to UE is determined the Target cell that this UE reports.Thereby only need UE to report a measurement report, just can accurately determine Target cell, to trigger, switch set-up procedure, without UE, go again the system broadcast information that reads adjacent cell to obtain the ECGI of this adjacent cell, also without UE, report again the second measurement report of the ECGI that comprises this adjacent cell, reduced to switch and prepared time delay, also reduced the call drop probability causing because time delay is long, improved the performance of handoffs of network, avoid supspending the problem of business datum transmitting-receiving, and then improved user's experience.
Accompanying drawing explanation
Fig. 1 solves the method schematic diagram that PCI obscures in prior art;
Fig. 2 is the method flow schematic diagram that the embodiment of the present invention is determined Target cell;
Fig. 3 is the reciprocal process schematic diagram of the primary importance information of the transferring service community, two base stations that in the embodiment of the present invention, the first is adjacent;
Fig. 4 is the reciprocal process schematic diagram of the primary importance information of the transferring service community, two base stations that in the embodiment of the present invention, the second is adjacent;
Fig. 5 is the network topology schematic diagram of the embodiment of the present invention;
Fig. 6 determines the method flow diagram of Target cell under embodiment of the present invention the first application scenarios;
Fig. 7 determines the method flow diagram of Target cell under embodiment of the present invention the second application scenarios;
Fig. 8 determines the method flow diagram of Target cell under the third application scenarios of the embodiment of the present invention;
Fig. 9 is that the embodiment of the present invention is determined the mutual schematic diagram between each equipment in the process of Target cell;
Figure 10 is the structural representation that the embodiment of the present invention is determined the equipment of Target cell.
Embodiment
The embodiment of the present invention is occurring that PCI obscures in situation, and the second place information comprising in the measurement report that the UE that serving BS can be served according to self reports, determines the Target cell that this UE reports.Thereby only need UE to report a measurement report, just can accurately determine Target cell, to trigger switching set-up procedure.
At present, in order to support minimum road test (Minisation ofDrive Test, MDT) function, in standard criterion TS36.331, in the measurement report of the measurement event (as A3, A4, A5 and B1, B2) that each triggering is switched, increased geographical location information.According to the configuration of network side, if UE can obtain available geographical location information when collecting measurement result, this geographical location information be carried in measurement report and send to network side.Wherein, geographical location information can be the latitude and longitude information of this current position of UE, can be also the current wireless signal fingerprint (fingerprint) measuring of this UE.
Further, latitude and longitude information can be provided by global positioning system (Global Positioning System, GPS) system, also can be provided by GLONASS (Global Navigation Satellite System) (Global Navigation Satellite System, GNSS) system.
Further, wireless signal fingerprint comprises reference symbol received power (the Reference Signal Received Power of the current adjacent cell except Target cell that can measure of this UE, RSRP) and/or the reference symbol quality of reception (Reference Signal Received Quality, RSRQ).
Below in conjunction with Figure of description, the embodiment of the present invention is described in further detail.
Shown in Figure 2, the embodiment of the present invention provides the method for the community that really sets the goal, and comprises the following steps:
Step 21, serving BS are after receiving the measurement report of the UE transmission of self serving, from each adjacent cell that self neighborhood region correlation chart comprises, search with this measurement report in the working frequency points of Target cell of this UE report of comprising and the adjacent cell that PCI matches, and using the adjacent cell finding as middle community;
If step 22 finds at least two middle communities, serving BS according to this locality, preserve each in the middle of community corresponding for represent that the primary importance information of self position and this measurement report comprise for representing the second place information of this current position of UE, in the middle of these at least two, community, determine the Target cell of this UE report.
In the embodiment of the present invention, in the measurement report that UE reports, comprise corresponding information and the second place information in Target cell of this UE report; Wherein, information corresponding to this Target cell comprises the information such as the RSRP/RSRQ of this Target cell that UE measures, the working frequency points of this Target cell and PCI;
In the embodiment of the present invention, serving BS is preserved the primary importance information of working frequency points corresponding to each community (being adjacent cell) that each adjacent base station controls and PCI, each community;
Wherein, primary importance information is the latitude and longitude information of position, community, and this latitude and longitude information can be provided by gps system or GNSS system;
Further, corresponding working frequency points and the PCI of each adjacent cell is generally kept in neighborhood region correlation chart; Primary importance information corresponding to each adjacent cell can be kept in this neighborhood region correlation chart, also can be kept at local other places.
Further, in serving BS neighborhood region correlation chart, also comprise the information such as ECGI corresponding to each community, tracking area identification (Tracking Area Identity, TAI).
In the embodiment of the present invention, the second place information comprising in this measurement report is: the latitude and longitude information of this current position of UE, or the current wireless signal fingerprint measuring of this UE;
It should be noted that, the wireless signal fingerprint measuring because UE is current comprises RSRP and/or the RSRQ of the current adjacent cell except Target cell that can measure of this UE, the i.e. RSRP of this UE peripheral cell and/or RSRQ, therefore, the wireless signal fingerprint that can measure according to this UE, determine the community adjacent with this UE, and then determine roughly the position at this current place of UE.
Further, if community in the middle of finding in step 21, the method also comprises:
Serving BS is defined as this community, centre the Target cell of UE report.
Further, at serving BS, determined that behind the Target cell of this UE report, the method also comprises:
Serving BS sends handover request to the target BS at this place, Target cell, to trigger the handoff procedure of UE.
In the embodiment of the present invention, serving BS obtains according to the following step primary importance information corresponding to each community that each adjacent base station is controlled:
Serving BS is set up interface with each adjacent base station respectively and is connected, and primary importance information corresponding to each community of controlling separately alternately by interface signaling message (as set up request message and setting up response message) with each adjacent base station;
Primary importance information corresponding to each community that this base station that serving BS sends by each adjacent base station of this interface signaling message sink is controlled, and store the primary importance information receiving into this locality.
Accordingly, primary importance information corresponding to each community of self controlling that each adjacent base station sends by this interface signaling message sink serving BS, and store the primary importance information receiving into this locality; And primary importance information corresponding to each community of self controlling to serving BS transmission by this interface signaling message.
Further, when serving BS sends primary importance information corresponding to each community of self controlling by interface signaling message, also send the configuration informations such as working frequency points corresponding to each community and PCI, ECGI, tracking area code (TrackingArea Code, TAC);
When adjacent base station sends primary importance information corresponding to each community of self controlling by interface signaling message, also send the configuration informations such as working frequency points corresponding to each community and PCI, ECGI, TAC.
Preferably, the interface that serving BS and each adjacent base station are set up is connected to X2 interface.
X2 interface take below as example, and the primary importance information of transferring service community, two base stations adjacent to the embodiment of the present invention (being eNB1 and eNB2) describes, and shown in Figure 3, reciprocal process comprises the following steps:
Step 31, eNB1 send X2 to eNB2 and set up request (X2Setup Request) message, and in this X2 sets up request message, carry the information such as each community (being local service community) of self controlling corresponding ECGI, PCI, working frequency points, TAC, primary importance information;
Step 32, eNB2 are set up after request message receiving X2, in this locality, preserve the configuration informations such as each community that eNB1 controls corresponding ECGI, PCI, working frequency points, TAC, primary importance information, and to eNB2, send X2 and set up response (X2Setup Response) message, and in setting up response message, carries this X2 the configuration informations such as each community (being local service community) of self controlling corresponding ECGI, PCI, working frequency points, TAC, primary importance information.
In the embodiment of the present invention, if arbitrary cell update that serving BS is controlled the one or more information in the working frequency points of self, PCI and primary importance information, the method also comprises:
Serving BS sends to each adjacent base station by interface signaling message by the configuration information after upgrading.
Accordingly, the configuration information after the renewal that adjacent base station sends by interface signaling message sink serving BS, and the configuration information of local this serving BS preserved of renewal.
In the embodiment of the present invention, if arbitrary cell update that arbitrary adjacent base station is controlled the one or more configuration informations in the working frequency points of self, PCI and primary importance information, the method also comprises:
This adjacent base station sends to serving BS by interface signaling message by the configuration information after upgrading.
Accordingly, the configuration information after the renewal that serving BS sends by this adjacent base station of interface signaling message sink, and the configuration information of local this adjacent base station preserved of renewal.
Preferably, this interface signaling message is that base station configuration updating (eNB Configuration Update) message and base station configuration updating are replied (eNB Configuration Update ACK) message.
Interface signaling message take below as base station configuration updating (eNB Configuration Update) message, the primary importance information of transferring service community, two base stations adjacent to the embodiment of the present invention (being eNB1 and eNB2) describes, shown in Figure 4, reciprocal process comprises the following steps:
If there is variation in the configuration information (as the one or more configuration informations in ECGI, PCI, working frequency points, TAC, primary importance information) of certain community that step 41 eNB1 controls (being certain Serving cell), eNB1 sends base station configuration updating (eNB Configuration Update) message to eNB2, and in this base station configuration updating information, carries the configuration information of this Serving cell after renewal;
Step 42, eNB2, after receiving this base station configuration updating information, upgrade the configuration information of the local eNB1 preserving, and to eNB1, return to base station configuration updating and reply (eNB Configuration Update ACK) message, to complete this config update.
In the embodiment of the present invention, each base station (being the serving BS of the embodiment of the present invention or the adjacent base station of this serving BS) obtains the primary importance information of each community of self controlling in the following manner:
Mode 1, base station are by Operation and Maintenance (Operation And Maintenance, OAM) primary importance information corresponding to each community that system acquisition self is controlled, wherein, when disposing base station, this OAM system is that base station configures primary importance information corresponding to each community of controlling this base station;
The positioner that mode 2, base station configure by self obtains primary importance information corresponding to each community of self controlling.
In the embodiment of the present invention, if community in the middle of determining at least two, serving BS determines that the Target cell of this UE report comprises following two kinds of methods:
The latitude and longitude information that the second place information comprising in the measurement report that method A, UE report is this current position of UE, the method comprises the following steps:
Serving BS, according to this second place information and these at least two primary importance information corresponding to middle community difference, is determined this UE and the distance value between community in the middle of each; And
Serving BS is defined as Target cell by middle community corresponding to minimum distance value, or middle community corresponding to distance value that is less than the first threshold value of setting is defined as to Target cell;
Wherein, the first threshold value of setting is empirical value, can set as required.
Under the method, the second place information of the UE providing in the measurement report primary importance information corresponding with local middle community of preserving is provided serving BS, will be defined as Target cell with the immediate middle community of UE.
The second place information comprising in the measurement report that method B, UE report is the current wireless signal fingerprint measuring of this UE, and the method further comprises again following two kinds of methods:
Method B1, the method comprise the following steps:
The primary importance information of each adjacent cell that serving BS is preserved according to this locality, determines this base station range Nei community Overlay Topology figure, wherein, and the relative position relation that has comprised any two adjacent cells in the Overlay Topology figure of this community;
The wireless signal fingerprint that the measurement report that serving BS reports according to UE comprises, determines the community adjacent with this UE; And
In the Overlay Topology figure of serving BS Jiang Gai community, all adjacent middle community be defined as Target cell with all adjacent cells of this UE determining.
Method B2, the method comprise the following steps:
The wireless signal fingerprint that the measurement report that serving BS reports according to UE comprises, determines the community adjacent with described UE; And
Serving BS by and all adjacent cells of this UE between the distance value middle community that is all less than the second threshold value of setting be defined as Target cell;
Wherein, the second threshold value of setting is empirical value, can set as required.
Below in conjunction with several concrete application scenarioss, the method for the embodiment of the present invention is elaborated.
Embodiment 1, suppose macrocell A(macro cell A) coverage in dispose 5 small-cells, be small cell1 ~ small cell5, its network topology is shown in Figure 5, wherein, small cell1 has identical working frequency points and PCI with small cell3, and the PCI of other small-cells is all not identical.In the present embodiment, each base station adopts mode 1 to obtain the primary importance information of each community of self controlling, and second place information is the latitude and longitude information of UE position; The macro base station that the present embodiment provides is determined the process of Target cell, shown in Figure 6, comprises the following steps:
Step 61, macro base station A obtain the primary importance information of each community of self controlling, and little base station obtains the primary importance information of each community of self controlling;
Concrete, operator is to dispose macro base station A(be the base station at macrocell A place) time, the primary importance information of macro cell A configured; And operator, when disposing little base station (being the base station at place, small-cell), configures the primary importance information of the small cell1 ~ small cell5 controlling each little base station;
Wherein, primary importance information is the latitude and longitude information of position, community.
Step 62, macrocell A, by Automatic Neighboring Relation (Automatic Neighbor Relation, ANR) function, determine the small cell1 ~ small cell5 disposing in its coverage;
Step 63, macro base station A set up interface with the little base station at small cell1 ~ small cell5 place respectively and are connected, and the primary importance information of the community of controlling separately alternately in the signaling message connecting;
Concrete, macro base station A sends in little base station to each carries primary importance information corresponding to each macrocell of self controlling in setting up request message;
Accordingly, each little base station to macro base station A, return set up response message in carry primary importance information corresponding to each small-cell of self controlling.
Preferably, macro base station A is connected to X2 interface with the interface that the little base station at small cell1 ~ small cell5 place is set up respectively.
Further, macro base station A sends in little base station to each also carries the information such as working frequency points, PCI, ECGI and TAI corresponding to each macrocell of self controlling in setting up request message;
Each little base station to macro base station A, return set up response message in also carry separately the information such as working frequency points, PCI, ECGI and TAI corresponding to each small-cell of controlling.
Step 64, macro base station A preserve primary importance information corresponding to small cell1 ~ small cell5 in this locality;
Further, if each little base station to macro base station A, return set up response message in also carry separately the information such as working frequency points, PCI, ECGI and TAI corresponding to each small-cell of controlling, macro base station A stores respectively the configuration informations such as working frequency points, PCI, ECGI and TAI corresponding to small cell1 ~ small cell5 in local neighborhood region correlation chart.
The measurement report that the UE of step 65, macro base station A reception self service reports;
Wherein, the signal strength signal intensity (as RSRP/RSRQ) that this measurement report comprises the Target cell that this UE measures (the present embodiment take small cell3 be example as Target cell), the working frequency points of this Target cell and PCI, and second place information corresponding to this UE;
Step 66, macro base station A determine the Target cell of this UE report; Concrete:
First, macro base station A is the local neighborhood region correlation chart of preserving using the working frequency points comprising in this measurement report and PCI as index search, finds and has two the middle communities that match, i.e. small cell1 and smallcell3;
Then, macro base station A is by the corresponding primary importance information respectively of communities in the middle of the second place information that comprises in this measurement report relatively and these two, determine that the distance between this UE and small cell3 is minimum, macro base station A determines that small cell3 is for the Target cell of this UE report.
Step 67, macro base station A send handover request message to the little base station at small cell3 place, to trigger switching set-up procedure.
Embodiment 2, still take the network topology shown in Fig. 5 as example, the present embodiment is similar to embodiment 1, different: in the present embodiment, macro base station A adopts mode 1 to obtain the primary importance information of each community of self controlling, and each little base station adjacent with this macro base station A adopts mode 2 to obtain the primary importance information of each community of self controlling;
Concrete, operator is to dispose macro base station A(be the base station at macrocell A place) time, the primary importance information of macro cell A configured; Each little base station gets the primary importance information of the small cell self controlling by self positioner.
Embodiment 3, still take the network topology shown in Fig. 5 as example, in the present embodiment, small eNB1 has set up interface with macro base station A and has been connected (as X2 interface), the Serving cell small cell1 of small eNB1 has changed the configuration information (as PCI, and PCI is after changing just identical with the PCI of small cell3) of self afterwards; In the present embodiment, macro base station is determined the process of Target cell, shown in Figure 7, comprises the following steps:
Step 71, small eNB1, to macro base station A transmission interface signaling message, carry the configuration information after small cell1 upgrades in this interface signaling message;
Wherein, configuration information comprises configuration parameter (this configuration parameter comprises working frequency points and PCI, ECGI, TAC etc.) and primary importance information;
Step 72, macro base station A, after receiving this interface signaling message, upgrade the configuration informations such as primary importance information of PCI, working frequency points, ECGI, TAI and the local small cell1 preserving that the small cell1 that preserves in local neighborhood region correlation chart is corresponding;
The measurement report that the UE of step 73, macro base station A reception self service reports, wherein, the RSRP/RSRQ that comprises the Target cell (the present embodiment is small cell1) that this UE measures in this measurement report, the PCI of Target cell and working frequency points, and second place information corresponding to this UE.
Step 74, macro base station A determine the Target cell of this UE report; Specifically comprise:
First, macro base station A is the local neighborhood region correlation chart of preserving using the working frequency points comprising in this measurement report and PCI as index search, finds and has two middle communities that match, i.e. small cell1 and small cell3;
Then, macro base station A is by the corresponding primary importance information respectively of communities in the middle of the second place information that comprises in this measurement report relatively and these two, determine that the distance between this UE and small cell1 is minimum, macro base station A determines that small cell1 is for the Target cell of this UE report.
Step 75, macro base station A send handover request message to the base station (small eNB1) at small cell1 place, to trigger switching set-up procedure.
Embodiment 4, still take the network architecture shown in Fig. 5 as example, in the present embodiment, second place information is the current wireless signal fingerprint measuring of UE; In the present embodiment, macro base station is determined the process of Target cell, shown in Figure 8, comprises the following steps:
Step 81, macro base station A obtain the primary importance information of each community of self controlling, and little base station obtains the primary importance information of each community of self controlling;
Concrete, operator is to dispose macro base station A(be the base station at macrocell A place) time, the primary importance information of macro cell A configured; Each little base station gets the primary importance information of the small cell self controlling by self positioner, or operator configures the primary importance information of the small cell1 ~ small cell5 controlling each little base station when disposing little base station (being the base station at place, small-cell);
Wherein, primary importance information is the latitude and longitude information of position, community.
Step 82, macrocell A, by ANR function, determine the small cell1 ~ small cell5 disposing in its coverage;
Step 83, macro base station A set up interface with the little base station at small cell1 ~ small cell5 place respectively and are connected, and the primary importance information of the community of controlling separately alternately in the signaling message connecting;
Concrete, macro base station A sends in little base station to each carries primary importance information corresponding to each macrocell of self controlling in setting up request message;
Accordingly, each little base station to macro base station A, return set up response message in carry primary importance information corresponding to each small-cell of self controlling.
Step 84, macro base station A preserve primary importance information corresponding to small cell1 ~ small cell5 in this locality;
Further, if each little base station to macro base station A, return set up response message in also carry separately the information such as working frequency points, PCI, ECGI and TAI corresponding to each small-cell of controlling, macro base station A stores respectively the configuration informations such as working frequency points, PCI, ECGI and TAI corresponding to small cell1 ~ small cell5 in local neighborhood region correlation chart.
Step 85, macro base station, according to the primary importance information of each the small cell getting, are determined self coverage Nei community Overlay Topology figure;
The measurement report that the UE of step 86, macro base station A reception self service reports;
Wherein, corresponding PCI and working frequency points and the current wireless signal fingerprint measuring of this UE (i.e. the RSRP/RSRQ of Ge adjacent with this UE community) in signal strength signal intensity (being RSRP/RSRQ), this Target cell that comprises the Target cell that this UE measures in this measurement report, suppose, in this wireless signal fingerprint, comprised small cell2 and RSRP/RSRQ corresponding to small cell5 that UE measures;
Step 87, macro base station A determine the Target cell of this UE report; Concrete:
First, macro base station A is the local neighborhood region correlation chart of preserving using the working frequency points comprising in this measurement report and PCI as index search, finds and has two middle communities that match, i.e. small cell1 and small cell3;
Then, macro base station A determines the rough position of UE by comparing and measuring wireless signal fingerprint in report, concrete: owing to having comprised the signal of small cell2 and small cell5 in wireless signal fingerprint, therefore, macro base station A can determine that the community adjacent with this UE is that small cell2 and small cell5(are that macro base station A can determine this UE at small cell2 and small cell5 around); Macro base station A is known according to the definite community Overlay Topology figure of step 85, with small cell2 and small cell5 all adjacent middle community be small cell3, thereby determine that small cell3 is Target cell;
Step 88, macro base station A send handover request message to little base station, small cell3 place (small eNB3), to trigger switching set-up procedure.
To describing alternately between the target BS at the place, Target cell of the serving BS of UE, this UE and this UE report, shown in Figure 9, the serving BS of supposing this UE is eNB1 below, and target BS is eNB2; Its reciprocal process is as follows:
Step 91, eNB1 and eNB2 are by the primary importance information of interface signaling interacting message Serving cell separately;
Step 92, UE for self providing the eNB1 of service to send measurement report, wherein, comprise PCI and working frequency points and the second place information of Target cell to current in this measurement report;
Neighborhood region correlation chart and this measurement report that step 93, eNB1 preserve according to self, determine the Target cell that this UE reports;
Concrete, first use PCI and working frequency points in measurement report to search at the neighborhood region correlation chart of this locality preservation as index; If community in the middle of finding at least two, compares the primary importance information of community in the middle of second place information and local each of preserving, to determine Target cell community in the middle of these at least two again;
Step 94, eNB1 trigger switching preparation to the eNB2 at this place, Target cell.
Said method handling process can realize with software program, and this software program can be stored in storage medium, when the software program of storage is called, carries out said method step.
Based on same inventive concept, a kind of equipment of definite Target cell is also provided in the embodiment of the present invention, because the principle that this equipment is dealt with problems is similar to the method for above-mentioned definite Target cell, so the enforcement of this equipment can, referring to the enforcement of method, repeat part and repeat no more.
Shown in Figure 10, the equipment of a kind of definite Target cell that the embodiment of the present invention provides, comprising:
The first processing module 101, for after receiving the measurement report of the UE transmission of self serving, from each adjacent cell that self neighborhood region correlation chart comprises, search with this measurement report in the working frequency points of Target cell of this UE report of comprising and the adjacent cell that PCI matches, and using the adjacent cell finding as middle community;
The second processing module 102, be used for when the first processing module 101 finds at least two middle communities, in the middle of each of preserving according to this locality community corresponding for represent that the primary importance information of self position and this measurement report comprise for representing the second place information of this current position of UE, in the middle of these at least two, community, determine Target cell.
As a kind of implementation, if second place information is the latitude and longitude information of this current position of UE, the second processing module 102 specifically for:
According to the second place information in measurement report and these at least two primary importance information corresponding to middle community difference, determine this UE and the distance value between community in the middle of each; And middle community corresponding to minimum distance value is defined as to Target cell, or middle community corresponding to distance value that is less than the first threshold value of setting is defined as to Target cell.
As another kind of implementation, if second place information is the current wireless signal fingerprint measuring of this UE, this second processing module 102 specifically for:
The primary importance information of each adjacent cell of preserving according to this locality, determines this base station range Nei community Overlay Topology figure; The wireless signal fingerprint comprising according to measurement report, determines the community adjacent with this UE; And all adjacent middle community be defined as Target cell with all adjacent cells of this UE determining in the Overlay Topology figure of Jiang community.
As another implementation, if second place information is the current wireless signal fingerprint measuring of this UE, the second processing module 102 specifically for:
The wireless signal fingerprint comprising according to measurement report, determines the community adjacent with this UE; And by and all adjacent cells of this UE between the distance value middle community that is all less than the second threshold value of setting be defined as Target cell.
Further, this equipment also comprises:
Information interaction module 103, is connected for setting up interface with each adjacent base station respectively, and primary importance information corresponding to each community of controlling separately by interface signaling interacting message with each adjacent base station; And primary importance information corresponding to each community of self controlling sending by each adjacent base station of interface signaling message sink, and store the primary importance information receiving into this locality.
Further, information interaction module 103 also for:
Having determined arbitrary cell update that self controls after the one or more configuration informations in working frequency points, PCI and primary importance information, by interface signaling message, the configuration information after upgrading is sent to each adjacent base station; And the configuration information after the renewal sending by the arbitrary adjacent base station of interface signaling message sink, and the configuration information of local this adjacent base station preserved of renewal.
Preferably, serving BS is connected to X2 interface with the interface that each adjacent base station is set up respectively.
Further, this equipment also comprises:
Acquisition of information module 104, for obtaining primary importance information corresponding to each community of self controlling;
Further, this equipment also comprises:
The 3rd processing module 105, for after the second processing module 102 has been determined Target cell, to the target BS transmission handover request at this place, Target cell, to trigger the handoff procedure of UE.
The embodiment of the present invention is occurring that PCI obscures in situation, and the second place information comprising in the measurement report that the serving BS of UE can report according to UE is determined the Target cell that this UE reports.Thereby only need UE to report a measurement report, just can accurately determine Target cell, to trigger, switch set-up procedure, without UE, go again the system broadcast information that reads adjacent cell to obtain the ECGI of this adjacent cell, also without UE, report again the second measurement report of the ECGI that comprises this adjacent cell, reduced to switch and prepared time delay, also reduced the call drop probability causing because time delay is long, improved the performance of handoffs of network, avoid supspending the problem of business datum transmitting-receiving, and then improved user's experience.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, implement software example or in conjunction with the form of the embodiment of software and hardware aspect completely.And the present invention can adopt the form that wherein includes the upper computer program of implementing of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code one or more.
The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be in computer program instructions realization flow figure and/or block diagram each flow process and/or the flow process in square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction of carrying out by the processor of computer or other programmable data processing device is produced for realizing the device in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame on computer or other programmable devices.
Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (18)
1. a method for definite Target cell, is characterized in that, the method comprises:
Serving BS is after receiving the measurement report of the user equipment (UE) transmission of self serving, from each adjacent cell that self neighborhood region correlation chart comprises, search with described measurement report in the working frequency points of Target cell of this UE report of comprising and the adjacent cell that PCI matches, and using the adjacent cell finding as middle community;
If community in the middle of finding at least two, described serving BS according to this locality, preserve each in the middle of community corresponding for represent that the primary importance information of self position and described measurement report comprise for representing the second place information of the current position of described UE, in the middle of described at least two, community, determine described Target cell.
2. the method for claim 1, is characterized in that, described second place information is: the latitude and longitude information of the current position of described UE, or the current wireless signal fingerprint measuring of described UE;
Described primary importance information is the latitude and longitude information of position, community;
Wherein, described wireless signal fingerprint comprises reference symbol received power RSRP and/or the reference symbol quality of reception RSRQ of the current adjacent cell except described Target cell that can measure of described UE.
3. the method for claim 1, is characterized in that, if the latitude and longitude information that described second place information is the current position of described UE, described serving BS is determined described Target cell, further comprises:
Described serving BS, according to described second place information and described at least two primary importance information corresponding to middle communities difference, is determined described UE and the distance value between community in the middle of each;
Described serving BS is defined as described Target cell by middle community corresponding to minimum distance value, or middle community corresponding to distance value that is less than the first threshold value of setting is defined as to described Target cell.
4. the method for claim 1, is characterized in that, if the described second place information current wireless signal fingerprint measuring that is described UE, described serving BS is determined described Target cell, further comprises:
The primary importance information of each adjacent cell that described serving BS is preserved according to this locality, determines this base station range Nei community Overlay Topology figure;
The wireless signal fingerprint that described serving BS comprises according to described measurement report, determines the community adjacent with described UE; And
Described serving BS will all adjacent middle community be defined as Target cell with all adjacent cells of the described UE determining in described community Overlay Topology figure.
5. the method for claim 1, is characterized in that, if the described second place information current wireless signal fingerprint measuring that is described UE, described serving BS is determined described Target cell, further comprises:
The wireless signal fingerprint that described serving BS comprises according to described measurement report, determines the community adjacent with described UE; And
Described serving BS by and all adjacent cells of described UE between the distance value middle community that is all less than the second threshold value of setting be defined as Target cell.
6. the method as described in claim 1 ~ 5 any one, is characterized in that, described serving BS obtains primary importance information corresponding to each community of controlling with each adjacent base station according to the following step:
Described serving BS is set up interface with each adjacent base station respectively and is connected, and primary importance information corresponding to each community of controlling separately by interface signaling interacting message with each adjacent base station;
Primary importance information corresponding to each community of self controlling that described serving BS sends by each adjacent base station of described interface signaling message sink, and store the primary importance information receiving into this locality.
7. method as claimed in claim 6, is characterized in that, described method also comprises:
Arbitrary adjacent base station, having determined arbitrary cell update that self controls after the one or more configuration informations in working frequency points, PCI and primary importance information, sends to described serving BS by described interface signaling message by the configuration information after upgrading; And the configuration information after the renewal sending by serving BS described in described interface signaling message sink, and the configuration information of local this serving BS preserved of renewal; And/or
Described serving BS, having determined arbitrary cell update that self controls after the one or more configuration informations in working frequency points, PCI and primary importance information, sends to each adjacent base station by described interface signaling message by the configuration information after upgrading; And the configuration information after the renewal sending by the arbitrary adjacent base station of described interface signaling message sink, and the configuration information of local this adjacent base station preserved of renewal.
8. method as claimed in claim 6, is characterized in that, described serving BS is connected to X2 interface with the interface that each adjacent base station is set up respectively.
9. the method as described in claim 1 ~ 5 any one, is characterized in that, each base station obtains primary importance information corresponding to each community that self controls in the following manner:
Primary importance information corresponding to each community that described base station is controlled by Operation and Maintenance OAM system acquisition self, wherein, when disposing base station, described OAM system is that described base station configures primary importance information corresponding to each community of controlling this base station; Or
Described base station obtains by the positioner of self configuration primary importance information corresponding to each community of self controlling;
Wherein, described base station is the adjacent base station of described serving BS or described serving BS.
10. the method for claim 1, is characterized in that, after described serving BS is determined described Target cell, described method also comprises:
Described serving BS sends handover request to the target BS at place, described Target cell, to trigger the handoff procedure of described UE.
The equipment of 11. 1 kinds of definite Target cells, is characterized in that, this equipment comprises:
The first processing module, for after receiving the measurement report of the UE transmission of self serving, from each adjacent cell that self neighborhood region correlation chart comprises, search with described measurement report in the working frequency points of Target cell of this UE report of comprising and the adjacent cell that PCI matches, and using the adjacent cell finding as middle community;
The second processing module, be used for when described the first processing module finds at least two middle communities, according to this locality, preserve for represent that the primary importance information of position, community in the middle of each and described measurement report comprise for representing the second place information of the current position of described UE, in the middle of described at least two, community, determine described Target cell.
12. equipment as claimed in claim 11, is characterized in that, if the latitude and longitude information that described second place information is the current position of described UE, described the second processing module specifically for:
According to described second place information and described at least two primary importance information corresponding to middle communities difference, determine described UE and the distance value between community in the middle of each; And middle community corresponding to minimum distance value is defined as to described Target cell, or middle community corresponding to distance value that is less than the first threshold value of setting is defined as to described Target cell.
13. equipment as claimed in claim 11, is characterized in that, if the described second place information current wireless signal fingerprint measuring that is described UE, described the second processing module specifically for:
The primary importance information of each adjacent cell of preserving according to this locality, determines this base station range Nei community Overlay Topology figure; The wireless signal fingerprint comprising according to described measurement report, determines the community adjacent with described UE; And will in described community Overlay Topology figure, all adjacent middle community be defined as Target cell with all adjacent cells of the described UE determining.
14. equipment as claimed in claim 11, is characterized in that, if the described second place information current wireless signal fingerprint measuring that is described UE, described the second processing module specifically for:
The wireless signal fingerprint comprising according to described measurement report, determines the community adjacent with described UE; And by and all adjacent cells of described UE between the distance value middle community that is all less than the second threshold value of setting be defined as Target cell.
15. equipment as described in claim 11 ~ 14 any one, is characterized in that, described equipment also comprises:
Information interaction module, is connected for setting up interface with each adjacent base station respectively, and primary importance information corresponding to each community of controlling separately by interface signaling interacting message with each adjacent base station; And primary importance information corresponding to each community of self controlling sending by each adjacent base station of described interface signaling message sink, and store the primary importance information receiving into this locality.
16. equipment as claimed in claim 15, is characterized in that, described information interaction module also for:
Having determined arbitrary cell update that self controls after the one or more configuration informations in working frequency points, PCI and primary importance information, by described interface signaling message, the configuration information after upgrading is sent to each adjacent base station; And the configuration information after the renewal sending by the arbitrary adjacent base station of described interface signaling message sink, and the configuration information of local this adjacent base station preserved of renewal.
17. equipment as described in claim 11 ~ 14 any one, is characterized in that, described equipment also comprises:
Acquisition of information module, for obtaining primary importance information corresponding to each community of self controlling.
18. equipment as claimed in claim 11, is characterized in that, described equipment also comprises:
The 3rd processing module, for after described the second processing module has been determined described Target cell, to the target BS transmission handover request at place, described Target cell, to trigger the handoff procedure of described UE.
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