CN102970759A - Neighborhood disturbance treatment method and device - Google Patents
Neighborhood disturbance treatment method and device Download PDFInfo
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- CN102970759A CN102970759A CN2011102565258A CN201110256525A CN102970759A CN 102970759 A CN102970759 A CN 102970759A CN 2011102565258 A CN2011102565258 A CN 2011102565258A CN 201110256525 A CN201110256525 A CN 201110256525A CN 102970759 A CN102970759 A CN 102970759A
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Abstract
The invention discloses a neighborhood disturbance treatment method and device. The method comprises receiving control plane signals from a disturbed base station, wherein the control plane signals comprise carrier wave information of a disturbed neighborhood which disturbed user equipment (UE) belongs to, and the disturbed UE is the UE disturbed by a disturbance source neighborhood of the disturbed base station in UE which the disturbed base station serves; and adjusting carrier frequency of the disturbance source neighborhood and/or carrier frequency of the disturbed neighborhood. Carrier waves of adjacent identical-frequency neighborhoods can be coordinated to be alternated, the disturbance to the UE is reduced, and performances of a whole network are improved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of area interference processing method and device.
Background technology
At present, the mobile communications network of main flow, no matter be to adopt global mobile communication (Global system for Mobile Communication, referred to as GSM)/GPRS (General Packet Radio Service, referred to as GPRS) 2nd generation/the 2.5th third generation mobile communication network, still adopt universal mobile telecommunications system (Universal Mobile Telecommunications System, referred to as UMTS) the 3rd third generation mobile communication network, all be by operator's unified planning, the homogeneous network of unified plan (Homogeneous Network).In a single day homogeneous network disposes, and the network capacity in the certain area is just fixing.
But in order to satisfy growing data traffic requirement, operator need to dispose more website, to satisfy the variation demand of (Quality of Service is called for short QoS) of some areas business load and service quality in the network.
The 4th third-generation mobile communication is disposed some low power nodes (Lower Power Node is called for short LPN) flexibly on the basis of original homogeneous network.For example, LPN can be deployed in hot spot region (as shown in Figure 1) with LPN flexibly according to number of users, thus can effectively increase the hot spot region network capacity, alleviate the load of macrocell in the hot spot region; LPN also can be deployed in cell edge (as shown in Figure 2), thereby can effectively strengthen the covering of cell edge, the QoS of raising Cell Edge User; LPN can also be deployed in indoor (as shown in Figure 3), thus can effectively strengthen indoor covering, improve indoor user QoS, satisfy the high traffic demand of indoor user, alleviate simultaneously the load of macrocell.
But, subscriber equipment (the User Equipment that interfered base station (being called Victim eNB) is served, referred to as UE) may be subject to the interference of co-frequency cell under contiguous other base stations, thereby cause the radio link quality between UE and serving BS to reduce, and then cause whole network performance to reduce.
Summary of the invention
Thereby cause the problem of the radio link quality reduction between UE and serving BS and propose the present invention for the UE that residential quarter under the interference source base station may disturb interfered base station to serve, for this reason, main purpose of the present invention is to provide a kind of area interference processing method and device, to address the above problem.
To achieve these goals, according to an aspect of the present invention, provide a kind of area interference processing method.
Area interference processing method according to the present invention comprises: receive the chain of command signaling from interfered base station, wherein the chain of command signaling comprises the carrier information of the interfered cell under the disturbed UE, and wherein disturbed UE is the UE that disturb the interference source residential quarter under the disturbed source base station among the UE that serves of interfered base station; Adjust the carrier frequency of interference source residential quarter and/or the carrier frequency of interfered cell.
Preferably, reception comprises from the chain of command signaling of interfered base station: exist between Macro eNB and Pico eNB in the situation that X2 is connected, Macro eNB is by the chain of command signaling of X2 interface reception from Pico eNB, wherein the chain of command signaling comprises the carrier information of the interfered cell under the disturbed UE, and wherein disturbed UE is the UE that the interference source residential quarter by under the Macro eNB among the UE that serves of Pico eNB is disturbed; Adjusting the carrier frequency of interference source residential quarter and/or the carrier frequency of interfered cell comprises: Macro eNB adjusts the carrier frequency of the interference source residential quarter under it.
Preferably, reception comprises from the chain of command signaling of interfered base station: the interference source base station receives the chain of command signaling from interfered base station of MME transparent transmission by the S1 interface, wherein the chain of command signaling comprises the carrier information of the interfered cell under the disturbed UE, and wherein disturbed UE is the UE that disturb the interference source residential quarter under the disturbed source base station among the UE that serves of interfered base station; Adjusting the carrier frequency of interference source residential quarter and/or the carrier frequency of interfered cell comprises: the carrier frequency of interference source residential quarter is adjusted in the interference source base station.
Preferably, reception comprises from the chain of command signaling of interfered base station: MME is by the chain of command signaling of S1 interface reception from interfered base station, wherein the chain of command signaling comprises the carrier information of the interfered cell under the disturbed UE, and wherein disturbed UE is the UE that disturb the interference source residential quarter under the disturbed source base station among the UE that serves of interfered base station; Adjusting the carrier frequency of interference source residential quarter and/or the carrier frequency of interfered cell comprises: MME adjusts the carrier frequency of interference source residential quarter and/or the carrier frequency of interfered cell.
Preferably, the interference source base station is that Macro eNB and interfered base station are Pico eNB; Perhaps, the interference source base station is that Home eNodeB HeNB and interfered base station are Macro eNB.
Preferably, it is one of following that the carrier frequency of adjusting the carrier frequency of interference source residential quarter and/or interfered cell comprises: close interference source residential quarter and/or interfered cell; The carrier frequency of interference source residential quarter and/or the carrier frequency of interfered cell are changed to still unappropriated carrier frequency; The carrier frequency that the carrier frequency of the carrier frequency of interference source residential quarter and/or interfered cell is updated to that other adjacent base station has taken but can the phase mutual interference between each other neighbor cell.
Preferably, carrier information comprises: EARFCN, transmission bandwidth.
Preferably, carrier information also comprise following one of at least: the carrier information of other residential quarter under the UE quantity in the interfered cell, the interfered base station except interfered cell.
To achieve these goals, according to an aspect of the present invention, also provide a kind of area interference processing method.
Area interference processing method according to the present invention comprises: MME is known the LPN start; In the carrier frequency that MME takies according to the MacroeNB that obtains in advance and the coverage of this Macro eNB except LPN other carrier frequency that has taken at the LPN that service is provided for UE, coordination LPN sets up the residential quarter.
Preferably, MME knows that LPN start comprises: the S1 that MME receives from LPN sets up request message, and wherein, S1 sets up request message and is used for LPN after start and before selecting carrier frequency the S1 connection is set up in request.
Preferably, in the coverage of carrier frequency that MME takies according to the Macro eNB that obtains in advance and this Macro eNB except LPN other carrier frequency that has taken at the LPN that service is provided for UE, coordinate LPN and set up before the residential quarter, it is one of following that said method also comprises: MME receives in the coverage of carrier frequency that the Macro eNB of operator's configuration takies and this Macro eNB other carrier frequency that has taken at the LPN that service is provided for UE except LPN; MME receives in the coverage of carrier frequency that this Macro eNB from Macro eNB takies and this Macro eNB other carrier frequency that has taken at the LPN that service is provided for UE except LPN by the S1 interface.
Preferably, in the carrier frequency that MME takies according to the Macro eNB that obtains in advance and the coverage of this Macro eNB except LPN other carrier frequency that has taken at the LPN that service is provided for UE, coordinate LPN and set up the residential quarter and comprise: MME determines the carrier frequency of LPN use according to the carrier frequency that takies; MME sends the carrier frequency of determining to LPN; LPN adopts the carrier frequency of determining to set up the residential quarter.
Preferably, in the carrier frequency that MME takies according to the macro base station Macro eNB that obtains in advance and the coverage of this Macro eNB except LPN other carrier frequency that has taken at the LPN that service is provided for user equipment (UE), coordination LPN sets up the residential quarter and comprises: do not preset at LPN in the situation of carrier frequency set, MME determines unappropriated carrier frequency according to the carrier frequency that takies; MME sends unappropriated carrier frequency to LPN; LPN selects one or more carrier frequencies in unappropriated carrier frequency; LPN adopts the carrier frequency of selecting to set up the residential quarter.
Preferably, in the carrier frequency that MME takies according to the Macro eNB that obtains in advance and the coverage of this Macro eNB except LPN other carrier frequency that has taken at the LPN that service is provided for UE, coordinating LPN sets up the residential quarter and comprise: preset the carrier frequency set and the carrier frequency set comprises in the situation of one or more carrier frequencies at LPN, MME sends the carrier frequency that takies to LPN; LPN gets rid of the carrier frequency that takies in the carrier frequency set; Select one or more carrier frequencies in the carrier frequency set of LPN after eliminating; LPN adopts the carrier frequency of selecting to set up the residential quarter.
Preferably, in the carrier frequency that MME takies according to the Macro eNB that obtains in advance and the coverage of this Macro eNB except LPN other carrier frequency that has taken at the LPN that service is provided for UE, coordinating LPN sets up the residential quarter and comprises: preset the carrier frequency set and the carrier frequency set comprises in the situation of one or more carrier frequencies that MME determines unappropriated carrier frequency according to the carrier frequency that takies at LPN; MME sends unappropriated carrier frequency to LPN; LPN determines the carrier frequency that overlaps with unappropriated carrier frequency in the carrier frequency set; LPN selects one or more carrier frequencies in the carrier frequency that overlaps; LPN adopts the carrier frequency of selecting to set up the residential quarter.
To achieve these goals, according to another aspect of the present invention, provide a kind of area interference processing unit.
Area interference processing unit according to the present invention comprises: receiver module, be used for receiving the chain of command signaling from interfered base station, wherein the chain of command signaling comprises the carrier information of the interfered cell under the disturbed UE, and wherein disturbed UE is the UE that disturb the interference source residential quarter under the disturbed source base station among the UE that serves of interfered base station; Adjusting module is used for adjusting the carrier frequency of interference source residential quarter and/or the carrier frequency of interfered cell.
To achieve these goals, according to another aspect of the present invention, also provide a kind of area interference processing unit.
Area interference processing unit according to the present invention can be applied to MME, and it comprises: know module, be used for knowing the LPN start; Coordination module for the carrier frequency that takies according to the Macro eNB that obtains in advance and coverage other carrier frequency that has taken at the LPN that service is provided for UE except LPN of this Macro eNB, is coordinated LPN and is set up the residential quarter.
The present invention can coordinate the carrier wave of contiguous co-frequency cell that staggers by adjusting the carrier frequency of this residential quarter, thereby reduces the interference to UE, and then improves whole network performance.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram according to the LPN focus covering of correlation technique;
Fig. 2 is the schematic diagram according to the LPN cell edge covering of correlation technique;
Fig. 3 is the schematic diagram according to the indoor covering of LPN of correlation technique;
Fig. 4 is the flow chart one according to the area interference processing method of the embodiment of the invention;
Fig. 5 is the interaction diagrams according to the area interference processing method of the preferred embodiment of the present invention one;
Fig. 6 is the interaction diagrams according to the area interference processing method of the preferred embodiment of the present invention two;
Fig. 7 is the flowchart 2 according to the area interference processing method of the embodiment of the invention;
Fig. 8 is the interaction diagrams according to the area interference processing method of the preferred embodiment of the present invention three;
Fig. 9 is the structured flowchart one according to the area interference processing unit of the embodiment of the invention;
Figure 10 is the structured flowchart two according to the area interference processing unit of the embodiment of the invention.
Embodiment
Need to prove that in the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
Fig. 4 is the flow chart one according to the area interference processing method of the embodiment of the invention, as shown in Figure 4, comprises that following step S402 is to step S404.
Step S402, reception is from the chain of command signaling of interfered base station, wherein the chain of command signaling comprises the carrier information of the interfered cell under the disturbed UE, and wherein disturbed UE is the UE that disturb the interference source residential quarter under the disturbed source base station among the UE that serves of interfered base station.
Step S404 adjusts the carrier frequency of interference source residential quarter and/or the carrier frequency of interfered cell.
In the correlation technique, the disturbed UE that the interference source residential quarter under the interference source base station may disturb interfered base station to serve, thus cause the radio link quality between disturbed UE and serving BS to reduce, and then cause whole network performance to reduce.The measurement result that base station in the embodiment of the invention (namely interfered base station) reports according to institute's service UE is known which UE is interfered and is the interference that is subject to which residential quarter (the namely interference source residential quarter under the interference source base station), then, adjust the carrier frequency of this interference source residential quarter and/or adjust the carrier frequency of disturbed UE affiliated subdistrict by interference source base station or MME, can coordinate the to stagger carrier wave of contiguous co-frequency cell, thereby reduce the interference to UE, and then improve whole network performance.
In order more clearly to describe above-mentioned steps S402 to step S404, the present invention from operating main body, mutual signaling and three aspects of MME effect, provides following example 1 to example 5 to be described in detail respectively.
Example 1
Between Macro eNB and Pico eNB, exist in the situation that X2 is connected, Macro eNB is by the chain of command signaling of X2 interface reception from Pico eNB, wherein the chain of command signaling comprises the carrier information of the interfered cell under the disturbed UE, and wherein disturbed UE is the UE that the interference source residential quarter by under the Macro eNB among the UE that serves of Pico eNB is disturbed; Macro eNB adjusts the carrier frequency of the interference source residential quarter under it.
Pico eNB be a kind of by operator dispose, with framework and the functionally similar LPN of Macro eNB.If in the coverage of macro base station, disposed Pico eNB, so when the resource of Macro eNB can't be loaded the UE of numerous accesses, Macro eNB can dispatch some UE and switch in the residential quarter (Pico Cell) that Pico eNB sets up to obtain load balance.That is to say, these UE are switched to the reason of Pico Cell just in order to reduce the load of Macro eNB.And on the other hand, because the transmitting power of Pico eNB is lower, if be positioned at cell edge so be linked into the UE of Pico Cell, so when Pico Cell (interfered cell, be called Victim Cell) with contiguous Macro Cell (interfered cell, be called Aggressor Cell) carrier frequency when identical, Pico UE will be subject to the interference of Macro eNB downstream transmission signals.
Consider this area interference, in this preferred embodiment, Macro eNB adjusts the carrier frequency of the interference source residential quarter under it according to the chain of command signaling that receives by X2 interface, the carrier wave of the contiguous co-frequency cell of can coordinating to stagger, thereby reduce the interference to UE, and then improve whole network performance.
Need to prove that this preferred embodiment has only been described Macro eNB and received the chain of command signaling by X2 interface.In the practical application, Macro eNB can also by other with Pico eNB between have the signaling reception chain of command signaling is connected, the S1 interface of description in the following example 2 for example.Therefore, these signalings all should be included protection scope of the present invention in.
Example 2
Macro eNB receives the chain of command signaling from Pico eNB of MME transparent transmission by the S1 interface, wherein the chain of command signaling comprises the carrier information of the interfered cell under the disturbed UE, and wherein disturbed UE is the UE that the interference source residential quarter by under the Macro eNB among the UE that serves of Pico eNB is disturbed; Macro eNB adjusts the carrier frequency of the interference source residential quarter under it.
In this preferred embodiment, MME only plays the effect of transparent transmission S1 interface, namely, Macro eNB (the base station under the interference source residential quarter, be called Aggressor eNB) make the coordination carrier wave, avoid interference decision according to the resource situation of self and the content of available carrier set, and adjust the carrier frequency (closing the carrier wave that Aggressor Cell still changes Aggressor Cell) of the residential quarter under it, thereby the carrier wave of the contiguous co-frequency cell of can coordinating to stagger, reduction is to the interference of UE, and then improves whole network performance.
Example 3
MME is by the chain of command signaling of S1 interface reception from Pico eNB, wherein the chain of command signaling comprises the carrier information of disturbed UE affiliated subdistrict, and wherein disturbed UE is the UE that the interference source residential quarter by under the Macro eNB among the UE that serves of Pico eNB is disturbed; MME adjusts the carrier frequency of the interference source residential quarter under the Macro eNB and/or the carrier frequency of the interfered cell under the Pico eNB.
In this preferred embodiment, MME plays the effect of the employed carrier wave of centralized each node of coordination Access Network, namely, MME is receiving the Pico eNB (base station under the interfered cell, be called Victim eNB) the Pico Cell (interfered cell that sends, be called Victim Cell) behind the carrier information, the situation of the employed carrier wave of each node of the Access Network of grasping according to self, turn to principle with the network performance maximum and make the decision of coordinating carrier wave, then, determine to adjust the carrier frequency of the interference source residential quarter under the Macro eNB according to this, thus the carrier wave of the contiguous co-frequency cell of can coordinating to stagger, reduction is to the interference of UE, and then improves whole network performance.
Example 4
HeNB receives the chain of command signaling from Macro eNB of MME transparent transmission by the S1 interface, wherein the chain of command signaling comprises the carrier information of the interfered cell under the disturbed UE, and wherein disturbed UE is the UE that the interference source residential quarter by under the HeNB among the UE that serves of Macro eNB is disturbed; HeNB adjusts the carrier frequency of the residential quarter under it.
HeNB is a kind of LPN that is controlled voluntarily by the user, between HeNB and Macro eNB without X2 interface, only and be positioned between the MME of core net and have the S1 interface.If in the coverage of macro base station, disposed HeNB, the user who belongs to so this HeNB understands priority access in HeNB Cell, and for being in the HeNB coverage or near rather than this HeNB user's UE just can't access HeNB Cell, can only access Macro Cell.If it is identical with the carrier frequency of this Macro cell (interfered cell is called Victim Cell) that HeNB is Cell (interfered cell is called Aggressor Cell), MacroUE will be subject to the interference of HeNB downstream transmission signals so.
Consider this area interference, MME only plays the effect of transparent transmission S1 interface in this preferred embodiment, namely, HeNB (the base station under the interference source residential quarter, be called Aggressor eNB) make the coordination carrier wave, avoid interference decision according to the resource situation of self and the content of available carrier set, and the carrier frequency (closing the carrier wave that Aggressor Cell still changes Aggressor Cell) of the interference source residential quarter under the adjustment HeNB, thereby the carrier wave of the contiguous co-frequency cell of can coordinating to stagger, reduction is to the interference of UE, and then improves whole network performance.
Example 5
MME receives chain of command signaling from Macro eNB by the S1 interface, and wherein the chain of command signaling comprises the carrier information of disturbed UE affiliated subdistrict, and wherein disturbed UE is the UE that the interference source residential quarter by under the HeNB among the UE that serves of Macro eNB is disturbed; MME adjusts the carrier frequency of the interference source residential quarter under the HeNB and/or the carrier frequency of the interfered cell under the Macro eNB.
In this preferred embodiment, MME plays the effect of the employed carrier wave of centralized each node of coordination Access Network, namely, MME is receiving the Macro eNB (base station under the interfered cell, be called Victim eNB) the Macro Cell (interfered cell that sends, be called Victim Cell) behind the carrier information, the situation of the employed carrier wave of each node of the Access Network of grasping according to self, turn to principle with the network performance maximum and make the decision of coordinating carrier wave, then, determine to adjust the carrier frequency of the interference source residential quarter under the HeNB according to this, thus the carrier wave of the contiguous co-frequency cell of can coordinating to stagger, reduction is to the interference of UE, and then improves whole network performance.
Need to prove; above-mentioned interference source base station and interfered base station in the embodiment of the invention implementation procedure several for example; in the practical application; it also may be Pico and Pico (by X2 interface and/or S1 interactive interfacing information), HeNB and HeNB (by X2 interface and/or S1 interactive interfacing information) even may be Pico and HeNB (but only having S1 interface interactive information) that these possible execution modes all should be included protection scope of the present invention in.
And then, the present invention also provides the carrier frequency of several adjustment interference sources residential quarter and/or the carrier frequency of interfered cell, namely close interference source residential quarter and/or interfered cell, the carrier frequency of interference source residential quarter and/or the carrier frequency of interfered cell are changed to still unappropriated carrier frequency, the carrier frequency of the carrier frequency of interference source residential quarter and/or interfered cell is updated to that other adjacent base station has taken but carrier frequency that can the phase mutual interference between each other neighbor cell.Need to prove, consider when Aggressor eNB is HeNB, there is the possibility of only setting up a residential quarter in HeNB, at this moment, HeNB preferably can be set to change the carrier frequency of self residential quarter and not close this residential quarter, thereby avoids can't obtaining the service that Home eNodeB provides owing to this residential quarter is closed the user who belongs to this HeNB who causes.
In addition, carrier information comprise following one of at least: the absolute wireless frequency channel number of evolved universal mobile communication system land radio access web (E-UTRA Absolute Radio Frequency Channel Number is referred to as EARFCN), transmission bandwidth (Transmission Bandwidth).And then, carrier information also comprise following one of at least: the carrier information (additional cell sign) of other residential quarter under the UE quantity in the residential quarter under the disturbed UE, the LPN except the affiliated residential quarter of disturbed UE.
Be described in detail below in conjunction with preferred embodiment one and two pairs of above-mentioned examples 1 of preferred embodiment implementation procedure to example 5.
Preferred embodiment one
This preferred embodiment one has been described when the Pico eNB (base station under the interfered cell, be called Victim eNB) in certain residential quarter Pico Cell (interfered cell, be called Victim Cell) under some UE when being interfered, if Pico eNB and the Macro eNB (base station under the interference source residential quarter, be called Aggressor eNB) between X2 interface is arranged, Pico eNB sends to Macro eNB with the carrier information of Pico Cell by X2 chain of command signaling so.Macro eNB is by the Pico Cell under this signaling Pico eNB of having known self-interference, and Macro eNB closes or change the carrier wave of Macro Cell so, disturbs no longer Pico Cell is produced.
Fig. 5 is the interaction diagrams according to the area interference processing method of the preferred embodiment of the present invention one, as shown in Figure 5, comprises that following step S502 is to step S506.
Step S502, Pico eNB receives the measurement reported result of institute's service UE, and it is contiguous with the frequently interference of Macro Cell to know that the UEs that is positioned at certain Pico cell edge is subject to.
Wherein, the measurement to co-frequency cell that the measurement that UE carries out or user periodically carry out, or eNB finds and the user between radio link quality lower (send message and do not receive answers to UE such as eNB) and the measurement of configuration UE execution.When UE measures homogenous frequency signal, can scan residential quarters all on this frequency and measure respectively; Carry the sign of residential quarter and the information such as signal strength signal intensity of this residential quarter in the measurement result that reports, receive the disturbed condition of knowing thus that namely UE is suffered in the base station that reports and disturb the source.
Step S504, if the built X2 of having is connected between Pico eNB and Macro eNB, the carrier information of the residential quarter (Pico Cell) under Pico eNB the UEs that these are disturbed sends to Macro eNB by X2 chain of command signaling so.
Above-mentioned carrier information includes but not limited to EARFCN and the Transmission Bandwidth of Pico Cell, and above-mentioned carrier information can be used as the newly-increased parameter in the existing X2 chain of command signaling, also can be a newly-increased X2 chain of command signaling.
Step S506, Macro eNB after receiving this message, know certain Macro Cell of self setting up under the Pico eNB, above-mentioned information has caused interference as the residential quarter of carrier wave in the message, if the resource situation of Macro eNB allows so at this moment (the UE quantity such as current access Macro eNB is few), Macro eNB can select to close Macro Cell; Macro eNB also can change the carrier wave of Macro Cell, the carrier wave of the Pico Cell that namely staggers, thus can not produce again interference to Pico Cell.
After Macro Cell closed or changes carrier wave, Macro eNB can send base station configuration updating (ENB CONFIGURATION UPDATE) message to notify the renewal of this cell information with the eNB that Macro eNB has X2 to be connected to Pico eNB and other.Further, if this Pico Cell can not be interfered again after a period of time (as there not being UE in this residential quarter), Pico eNB can ask Macro eNB to activate former pent Macro Cell so.
It should be noted that in this preferred embodiment one that what describe is that Pico eNB disposes comparatively sparse scene, when in the coverage of Macro eNB a Pico eNB only being arranged.If the deployment of Pico eNB is comparatively intensive, the interference that Pico Cell is subject to also may derive from certain residential quarter under the contiguous Pico eNB, Pico eNB can be sent to interference source Pico eNB with the carrier information of Pico Cell according to the measurement reported result of UE, receives the Pico eNB process of this information with above-mentioned MacroeNB.
Preferred embodiment two
This preferred embodiment two has been described when some UE under certain residential quarter Victim Cell among the Victim eNB is interfered, if do not have X2 interface between Victim eNB and Aggressor eNB, Victim eNB sends to Aggressor eNB with the carrier information of Victim Cell by S1 chain of command signaling so.Aggressor eNB is by the Victim Cell under this message Victim eNB of having known self-interference, and Aggressor eNB closes or change the carrier frequency of Aggressor Cell so, disturbs thereby no longer Victim Cell is produced.
In this preferred embodiment two, if Victim eNB refers to Pico eNB, Aggressor eNB refers to Macro eNB so; If Victim eNB refers to Macro eNB, Aggressor eNB refers to HeNB so.
Fig. 6 is the interaction diagrams according to the area interference processing method of the preferred embodiment of the present invention two, as shown in Figure 6, comprises that following step S602 is to step S606.
Step S602, Victim eNB know that according to the measurement reported result of institute's service UE the UEs that is positioned at edge, certain residential quarter (Victim Cell) is subject to the interference of contiguous co-frequency cell (Aggressor Cell).
Wherein, the measurement to co-frequency cell that the measurement that UE carries out or user periodically carry out, or eNB finds and the user between radio link quality lower (send message and do not receive answers to UE such as eNB) and the measurement of configuration UE execution.When UE measures homogenous frequency signal, can scan residential quarters all on this frequency and measure respectively; Carry the sign of residential quarter and the information such as signal strength signal intensity of this residential quarter in the measurement result that reports, receive the disturbed condition of knowing thus that namely UE is suffered in the base station that reports and disturb the source.
Step S604, Victim eNB sends to Aggressor eNB with the carrier information of Victim Cell by S1 chain of command signaling.This S1 signaling need be passed through MME, and namely signaling at first sends to core network element MME by Victim eNB, is sent to Aggressor eNB by MME again.Wherein, MME can only play the effect that signaling is transmitted (transparent transmission), carries out interference management after also can receiving signaling.
If MME carries out interference management after receiving signaling, so specifically, the destination node that Victim eNB sends this signaling is MME, after MME receives this message, know the carrier information of interfered cell among the Victim eNB (in suc scheme, this signaling also should be carried the sign of Aggressor eNB/Aggressor Cell), MME can ask Aggressor eNB to close Aggressor Cell (only when Aggressor Cell is Macro Cell or residential quarter that the HeNB that can set up a plurality of HeNB Cell is set up so, namely if this HeNB only can set up a residential quarter, this residential quarter can not be closed so) or ask it to change the carrier frequency of Aggressor Cell, MME can also directly notify carrier wave frequency information that Aggressor eNB should be updated to (if Victim eNB is Pico eNB, MME also can send to Pico eNB with above-mentioned request, namely avoids re-using disturbed residential quarter by Pico eNB and provides service to UE).ENB runs succeeded and then replys acknowledge message after receiving the information that MME sends, otherwise replys failed message.It is the planning of coordination network that MME makes the principle that interference management determines, as far as possible so that adjacent possible interfering with each other to the residential quarter be based upon on the different carrier waves overall performance of maximization network.
Above-mentioned carrier information includes but not limited to EARFCN and the Transmission Bandwidth of Victim Cell.The chain of command signaling of above-mentioned transmission carrier information can directly be set to the S1 signaling, thereby also can be not have X2 to connect in the time of can't transmitting the X2 signaling S1 signaling that can only select (MME only plays the effect of transparent transmission in such cases) between two base stations.It should be noted that, when not having X2 to connect between two base stations, can at first attempt setting up X2 and connect, unless set up unsuccessful or two base stations between originally do not have X2 interface, as (that is to say, can only transmit the S1 signaling between HeNB and Macro eNB) between HeNB and Macro eNB; Be successfully established if X2 connects, then carry out such as above-mentioned preferred embodiment one.
To HeNB deployment scenario supplementary notes a bit is to be deployed with HeNB GW node in the network.This node plays the MME function to HeNB, namely receives the S1 chain of command signaling of HeNB, is transmitted to the MME of core net again.Namely concerning such scheme, between HeNB (Aggressor eNB) and MME, also has a HeNB GW forwarding information.
Step S606, if MME only plays the effect of transparent transmission, so Aggressor eNB after receiving signaling, know certain residential quarter (Aggressor Cell) of self setting up under the Victim eNB, above-mentioned information has caused interference as the residential quarter of carrier wave in the message, if the resource situation of Aggressor eNB this moment (Macro eNB) allows so (the UE quantity such as current access Macro eNB is few), Macro eNB can select to close AggressorCell; AggressoreNB (Macro eNB, HeNB) also can change the carrier wave of Aggressor Cell, the carrier wave of the Victim Cell that namely staggers, thus can not produce again interference to Victim Cell.
The present invention also provides a kind of area interference processing method.Fig. 7 is the flowchart 2 according to the area interference processing method of the embodiment of the invention, as shown in Figure 7, comprises that following step S702 is to step S704.
Step S702, MME are known the LPN start.
In the carrier frequency that step S704, MME take according to the Macro eNB that obtains in advance and the coverage of this Macro eNB except LPN other carrier frequency that has taken at the LPN that service is provided for UE, coordination LPN sets up the residential quarter.
Describe MME in this preferred embodiment and coordinated the process that the LPN carrier frequency is set up the residential quarter.Because this carrier frequency is the different carrier frequency of carrier frequency that takies with Macro eNB and other LPN, therefore, LPN sets up the residential quarter according to this carrier frequency, and the residential quarter that can avoid setting up produces interference with neighbor cell.
Preferably, MME knows that LPN start comprises: the S1 that MME receives from LPN sets up request message, and wherein, S1 sets up request message and is used for LPN after start and before selecting carrier frequency the S1 connection is set up in request.
Preferably, in the coverage of carrier frequency that MME takies according to the Macro eNB that obtains in advance and this Macro eNB except LPN other carrier frequency that has taken at the LPN that service is provided for UE, coordinate LPN and use with the different carrier frequency of the carrier frequency that takies and set up before the residential quarter, it is one of following that said method also comprises: MME receives the carrier frequency that the Macro eNB of operator's configuration takies; MME receives the carrier frequency that this Macro eNB from Macro eNB takies by the S1 interface.
In order more clearly to describe above-mentioned steps S704, the present invention from selecting main body and whether presetting two aspects of carrier frequency set, provides following example 6 to example 9 to be described in detail respectively.
Example 6
MME determines the carrier frequency that LPN uses according to the carrier frequency that takies; MME sends the carrier frequency of determining to LPN; LPN adopts the carrier frequency of determining to set up the residential quarter.The carrier frequency that this example 6 selects LPN to use by MME, and indicate LPN to use this carrier frequency to set up the residential quarter, it is easy, direct that mode is set up in such residential quarter.
Example 7
Do not preset at LPN in the situation of carrier frequency set, MME determines unappropriated carrier frequency according to the carrier frequency that takies; MME sends unappropriated carrier frequency to LPN; LPN selects one or more carrier frequencies in unappropriated carrier frequency; LPN adopts the carrier frequency of selecting to set up the residential quarter.This example 7 is by the carrier frequency of LPN its use of selection in the situation that does not preset the carrier frequency set, and mode is set up in such residential quarter can guarantee that LPN independently selects its carrier frequency, thereby reduces the interference to UE, improves whole network performance.
Example 8
Preset carrier frequency set and the carrier frequency set comprises in the situation of one or more carrier frequencies at LPN, MME sends the carrier frequency that takies to LPN; LPN gets rid of the carrier frequency that takies in the carrier frequency set; Select one or more carrier frequencies in the carrier frequency set of LPN after eliminating; LPN adopts the carrier frequency of selecting to set up the residential quarter.This example 8 is by the carrier frequency of LPN its use of selection in the situation that presets the carrier frequency set, and mode is set up in such residential quarter can guarantee that LPN chooses the carrier frequency that it is fit to as far as possible, thereby reduces the interference to UE, improves whole network performance.
Example 9
Preset carrier frequency set and the carrier frequency set comprises in the situation of one or more carrier frequencies that MME determines unappropriated carrier frequency according to the carrier frequency that takies at LPN; MME sends unappropriated carrier frequency to LPN; LPN determines the carrier frequency that overlaps with unappropriated carrier frequency in the carrier frequency set; LPN selects one or more carrier frequencies in the carrier frequency that overlaps; LPN adopts the carrier frequency of selecting to set up the residential quarter.This example 9 is by the carrier frequency of LPN its use of selection in the situation that presets the carrier frequency set, and mode is set up in such residential quarter can guarantee that LPN chooses the carrier frequency that it is fit to as far as possible, thereby reduces the interference to UE, improves whole network performance.
Need to prove that above-mentioned LPN can comprise Pico eNB or HeNB.Especially, for the HeNB that can only set up a residential quarter, HeNB only selects a carrier frequency to get final product in the optional carrier frequency in above-mentioned example 7 and example 9.
Be described in detail below in conjunction with the implementation procedure of three pairs of above-mentioned examples 6 of preferred embodiment to example 9.
Preferred embodiment three
The controls such as switch, position of considering flexibility that LPN disposes and part LPN (such as HeNB) more are in user's hand rather than depend on operator, therefore, in this preferred embodiment three, the carrier frequency of after LPN start, at first selecting can be by node between interactive information decide rather than come pre-configured by operator.Like this, need MME can be base station assigns carrier wave (or relevant information is provided), so LPN when start just can by with MME between S1 be connected and obtain carrier information, thereby choose the carrier wave of neighbor cell interference minimum is set up the residential quarter.
Fig. 8 is the interaction diagrams according to the area interference processing method of the preferred embodiment of the present invention three, as shown in Figure 8, comprises that following step S802 is to step S804.
Step S802, Macro eNB is disposed by operator, and its carrier frequency is also come pre-configured (when referring to Macro eNB start accordingly by operator according to the network planning; In the process for the UE service, may need to adjust, as described in preferred embodiment one, two).In the heterogeneous network scene, when LPN (Pico eNB or HeNB) starts shooting, namely also do not select carrier wave, when setting up the residential quarter, at first set up S1 with MME and be connected, namely LPN sends S1 to MME and sets up request (S1 SETUP REQUEST) message, MME answer S1 foundation response (S1 SETUP RESPONSE) message.Connect in the process of setting up at this, MME has been known the sign of this eNB and the essential informations such as tracking area of supporting.
Step S804, MME notifies carrier wave that this node should select or the relevant information of assisted Selection carrier wave to LPN.
Specifically, MME need to coordinate Access Network carrier wave that each node uses, so (i.e. covering of existing Macro eNB before above-mentioned LPN start, even also have in the coverage of this Macro eNB other at the LPN that service is provided for UE), MME has had the essential informations such as carrier frequency that the base station in the service has taken: for the carrier information of Macro eNB, can notify MME by Macro eNB when also notifying accordingly MME or the S1 information interaction between Macro eNB and MME after the configuration by operator.
For the LPN that needs distributing carrier wave, 1) if the start LPN pre-configured available carrier set, MME can be to its carrier wave of notifying other base stations to take so, and then LPN selects self to use remove occupied carrier wave in pre-configured carrier set after; 2) if LPN does not have pre-configured carrier set, MME can be according to the deployment of network and the shared carrier case in base station of each built vertical residential quarter, notify unappropriated carrier set (namely can not produce to the residential quarter that other nodes are set up available carrier wave set co-channel interference, the maximization network performance) to LPN, namely choose carrier wave according to the number of cells that self will set up after LPN receives; 3) more direct scheme is, MME directly notifies its carrier wave that should select (namely not being a selectable set) to LPN.
Above-mentioned carrier information can increase newly at S1 and connect in the message of setting up, i.e. S1 SETUP REQUEST message and S1SETUP RESPONSE message; Also can be to connect at S1 to set up rear newly-increased a piece of news, LPN also should reply one and confirm message to MME after having selected the carrier wave that will use so.
Mutual by above-mentioned information, LPN can set up the residential quarter according to the carrier information that obtains, and the residential quarter of setting up so can neighbor cell produces disturbs, perhaps with respect to selecting other carrier waves to set up the interference minimum that the residential quarter produces neighbor cell.
Need to prove, can in the computer system such as one group of computer executable instructions, carry out in the step shown in the flow chart of accompanying drawing, and, although there is shown logical order in flow process, but in some cases, can carry out step shown or that describe with the order that is different from herein.
The embodiment of the invention provides a kind of area interference processing unit, and this area interference processing unit can be used for realizing above-mentioned area interference processing method.Fig. 9 is the structured flowchart one according to the area interference processing unit of the embodiment of the invention, as shown in Figure 9, comprises receiver module 92 and adjusting module 94.
Receiver module 92, be used for receiving the chain of command signaling from interfered base station, wherein the chain of command signaling comprises the carrier information of the interfered cell under the disturbed UE, and wherein disturbed UE is the UE that disturb the interference source residential quarter under the disturbed source base station among the UE that serves of interfered base station; Adjusting module 94 is connected to receiver module 92, is used for adjusting the carrier frequency of interference source residential quarter and/or the carrier frequency of interfered cell after receiver module 92 receives the chain of command signaling.
The embodiment of the invention provides a kind of area interference processing unit, and this area interference processing unit can be applied to MME, and can be used for realizing above-mentioned area interference processing method.Figure 10 is the structured flowchart two according to the area interference processing unit of the embodiment of the invention, as shown in figure 10, comprises and knows module 1002 and Coordination module 1004.
Know module 1002, be used for knowing the LPN start; Coordination module 1004, be connected to and know module 1002, be used for after knowing that module 1002 is known the LPN start, in the carrier frequency that takies according to the Macro eNB that obtains in advance and the coverage of this MacroeNB except LPN other carrier frequency that has taken at the LPN that service is provided for UE, coordinate LPN and set up the residential quarter.
Need to prove that the area interference processing unit of describing among the device embodiment is corresponding to above-mentioned embodiment of the method, its concrete implementation procedure had been carried out detailed description in embodiment of the method, do not repeat them here.
In sum, according to the abovementioned embodiments of the present invention, a kind of area interference processing method and device are provided.The measurement result that base station among the present invention (namely interfered base station) reports according to institute's service UE is known which UE is interfered and is the interference that is subject to which residential quarter (the namely interference source residential quarter under the interference source base station), then, adjust the carrier frequency of this interference source residential quarter and/or adjust the carrier frequency of disturbed UE affiliated subdistrict by interference source base station or MME, can coordinate the to stagger carrier wave of contiguous co-frequency cell, thereby reduce the interference to UE, and then improve whole network performance.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and be carried out by calculation element, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (17)
1. area interference processing method is characterized in that comprising:
Reception is from the chain of command signaling of interfered base station, wherein said chain of command signaling comprises the carrier information of the interfered cell under the disturbed user equipment (UE), and wherein said disturbed UE is the UE that disturb the interference source residential quarter under the disturbed source base station among the UE that serves of described interfered base station;
Adjust the carrier frequency of described interference source residential quarter and/or the carrier frequency of described interfered cell.
2. method according to claim 1 is characterized in that,
Reception comprises from the chain of command signaling of interfered base station: exist between macro base station Macro eNB and the little base station PicoeNB of low-power in the situation that X2 is connected, described Macro eNB is by the described chain of command signaling of X2 interface reception from described Pico eNB, wherein said chain of command signaling comprises the carrier information of the interfered cell under the disturbed UE, and wherein said disturbed UE is the UE that the interference source residential quarter by under the described Macro eNB among the UE that serves of described Pico eNB is disturbed;
Adjusting the carrier frequency of described interference source residential quarter and/or the carrier frequency of described interfered cell comprises: described MacroeNB adjusts the carrier frequency of the described interference source residential quarter under it.
3. method according to claim 1 is characterized in that,
Reception comprises from the chain of command signaling of interfered base station: described interference source base station receives the described chain of command signaling from described interfered base station of MME transparent transmission by the S1 interface, wherein said chain of command signaling comprises the carrier information of the interfered cell under the disturbed UE, and wherein said disturbed UE is the UE that disturb the interference source residential quarter under the disturbed source base station among the UE that serves of described interfered base station;
Adjusting the carrier frequency of described interference source residential quarter and/or the carrier frequency of described interfered cell comprises: the carrier frequency of described interference source residential quarter is adjusted in described interference source base station.
4. method according to claim 1 is characterized in that,
Reception comprises from the chain of command signaling of interfered base station: described MME is by the described chain of command signaling of S1 interface reception from described interfered base station, wherein said chain of command signaling comprises the carrier information of the interfered cell under the disturbed UE, and wherein said disturbed UE is the UE that disturb the interference source residential quarter under the disturbed source base station among the UE that serves of described interfered base station;
Adjusting the carrier frequency of described interference source residential quarter and/or the carrier frequency of described interfered cell comprises: described MME adjusts the carrier frequency of described interference source residential quarter and/or the carrier frequency of described interfered cell.
5. according to claim 3 or 4 described methods, it is characterized in that described interference source base station is that Macro eNB and described interfered base station are Pico eNB; Perhaps, described interference source base station is that Home eNodeB HeNB and described interfered base station are Macro eNB.
6. each described method in 4 according to claim 1 is characterized in that, it is one of following that the carrier frequency of adjusting the carrier frequency of described interference source residential quarter and/or described interfered cell comprises:
Close described interference source residential quarter and/or described interfered cell;
The carrier frequency of described interference source residential quarter and/or the carrier frequency of described interfered cell are changed to still unappropriated carrier frequency;
The carrier frequency that the carrier frequency of the carrier frequency of described interference source residential quarter and/or described interfered cell is updated to that other adjacent base station has taken but can the phase mutual interference between each other neighbor cell.
7. each described method in 4 according to claim 1 is characterized in that described carrier information comprises: the absolute wireless frequency channel number of evolved universal mobile communication system land radio access web EARFCN, transmission bandwidth.
8. method according to claim 7 is characterized in that, described carrier information also comprise following one of at least: the carrier information of other residential quarter under the UE quantity in the described interfered cell, the described interfered base station except described interfered cell.
9. area interference processing method is characterized in that comprising:
Mobility Management Entity MME is known low power nodes LPN start;
In the carrier frequency that described MME takies according to the macro base station Macro eNB that obtains in advance and the coverage of this Macro eNB except described LPN other carrier frequency that has taken at the LPN that service is provided for user equipment (UE), coordinate described LPN and set up the residential quarter.
10. method according to claim 9, it is characterized in that, MME knows that LPN start comprises: the S1 that MME receives from LPN sets up request message, and wherein, described S1 sets up request message and is used for described LPN after start and before selecting carrier frequency the S1 connection is set up in request.
11. method according to claim 9, it is characterized in that, in the coverage of carrier frequency that described MME takies according to the Macro eNB that obtains in advance and this Macro eNB except described LPN other carrier frequency that has taken at the LPN that service is provided for UE, coordinate described LPN and set up before the residential quarter, it is one of following that described method also comprises:
Described MME receives in the coverage of carrier frequency that the described Macro eNB of operator's configuration takies and this Macro eNB other carrier frequency that has taken at the LPN that service is provided for UE except described LPN;
Described MME receives in the coverage of carrier frequency that this Macro eNB from described Macro eNB takies and this Macro eNB other carrier frequency that has taken at the LPN that service is provided for UE except described LPN by the S1 interface.
12. method according to claim 9, it is characterized in that, in the carrier frequency that described MME takies according to the Macro eNB that obtains in advance and the coverage of this Macro eNB except described LPN other carrier frequency that has taken at the LPN that service is provided for UE, coordinate described LPN and set up the residential quarter and comprise:
Described MME determines the carrier frequency that described LPN uses according to the described carrier frequency that takies;
Described MME sends described definite carrier frequency to described LPN;
Described LPN adopts described definite carrier frequency to set up the residential quarter.
13. method according to claim 9, it is characterized in that, in the carrier frequency that described MME takies according to the macro base station Macro eNB that obtains in advance and the coverage of this Macro eNB except described LPN other carrier frequency that has taken at the LPN that service is provided for user equipment (UE), coordinate described LPN and set up the residential quarter and comprise:
Do not preset at described LPN in the situation of carrier frequency set, described MME determines unappropriated carrier frequency according to the described carrier frequency that takies;
Described MME sends described unappropriated carrier frequency to described LPN;
Described LPN selects one or more carrier frequencies in described unappropriated carrier frequency;
Described LPN adopts the carrier frequency of described selection to set up the residential quarter.
14. method according to claim 9, it is characterized in that, in the carrier frequency that described MME takies according to the Macro eNB that obtains in advance and the coverage of this Macro eNB except described LPN other carrier frequency that has taken at the LPN that service is provided for UE, coordinate described LPN and set up the residential quarter and comprise:
Preset carrier frequency set and the set of described carrier frequency comprises in the situation of one or more carrier frequencies that described MME sends the described carrier frequency that takies to described LPN at described LPN;
Described LPN gets rid of the described carrier frequency that takies in described carrier frequency set;
Select one or more carrier frequencies in the carrier frequency set of described LPN after eliminating;
Described LPN adopts the carrier frequency of described selection to set up the residential quarter.
15. method according to claim 9, it is characterized in that, in the carrier frequency that described MME takies according to the Macro eNB that obtains in advance and the coverage of this Macro eNB except described LPN other carrier frequency that has taken at the LPN that service is provided for UE, coordinate described LPN and set up the residential quarter and comprise:
Preset carrier frequency set and the set of described carrier frequency comprises in the situation of one or more carrier frequencies that described MME determines unappropriated carrier frequency according to the described carrier frequency that takies at described LPN;
Described MME sends described unappropriated carrier frequency to described LPN;
Described LPN determines the carrier frequency that overlaps with described unappropriated carrier frequency in the set of described carrier frequency;
Described LPN selects one or more carrier frequencies in the carrier frequency of described coincidence;
Described LPN adopts the carrier frequency of described selection to set up the residential quarter.
16. an area interference processing unit is characterized in that comprising:
Receiver module, be used for receiving the chain of command signaling from interfered base station, wherein said chain of command signaling comprises the carrier information of the interfered cell under the disturbed user equipment (UE), and wherein said disturbed UE is the UE that disturb the interference source residential quarter under the disturbed source base station among the UE that serves of described interfered base station;
Adjusting module is used for adjusting the carrier frequency of described interference source residential quarter and/or the carrier frequency of described interfered cell.
17. an area interference processing unit is applied to Mobility Management Entity MME, it is characterized in that comprising:
Know module, be used for knowing low power nodes LPN start;
Coordination module, for the carrier frequency that takies according to the macro base station Macro eNB that obtains in advance and coverage other carrier frequency that has taken at the LPN that service is provided for user equipment (UE) except described LPN of this MacroeNB, coordinate described LPN and set up the residential quarter.
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