CN101902788A - Method for enabling macro base station UE to access home base station and method for controlling interference of home base station - Google Patents
Method for enabling macro base station UE to access home base station and method for controlling interference of home base station Download PDFInfo
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Abstract
The invention discloses a method for enabling a macro base station UE to access a home base station. In the method, all home base stations in the coverage area of a macro base station perform uplink network access to the macro base station, inform of the macro base station that the accessed base stations are home base stations and transmit own identification information to the macro base station; the macro base station estimates the geographic positions of the home base stations in the coverage area and UE in the activated state, determines the home base stations adjacent to the geographic position of the UE based on the estimation and transmits a neighboring area list containing information of the home base stations to the UE. The invention also discloses a method for controlling interference of a home base station. By using the invention, UE can acquire a neighboring area list containing relevant information of home base stations near the UE, so that the UE can be switched to the home base station from the macro base station. Besides, by using the invention, the interference of the home base station on the macro base station can be effectively controlled, thereby balancing the coverage area of the home base station and the interference on the macro base station.
Description
Technical field
The present invention relates to TD SDMA and insert (TD-SCDMA) technology, particularly a kind of method and a kind of method of controlling the interference of Home eNodeB of macro base station UE incision Home eNodeB.
Background technology
Along with TD-SCDMA development at home, the user is more and more urgent in the demand that indoor (family or office) carries out high-speed data service.In this case, the development of Home eNodeB (Home NodeB) and utilization seem particularly important.Home eNodeB is primarily aimed at domestic consumer and small business, and it can effectively solve indoor covering problems such as 3G system applies frequency range height, penetration capacity difference, and plays the effect of the covering blind spot of filling up macro base station.
For macro base station, according to the network planning, a macro base station can be known its situation of macro base station on every side, therefore, be in the interior UE (being designated hereinafter simply as " macro base station UE ") of macro base station signal cover when carrying out the network switching, macro base station can be notified its Neighboring Cell List this macro base station UE, so that macro base station UE measures neighboring area signal, for switching is prepared.But because Home eNodeB is towards family and office environment, the user puts the very big randomness of existence to Home eNodeB, and therefore, Home eNodeB can't be arranged by the network planning of going ahead of the rest as common macro base station.This will cause UE to go wrong in handoff procedure, below this problem be described:
When UE when Home eNodeB switches to macro base station: because Home eNodeB is in the coverage of macro base station usually, therefore, Home eNodeB can be known the information of macro base station and read Neighboring Cell List by the broadcast channel of reading macro base station.Thereby, UE from Home eNodeB when macro base station switches, the Home eNodeB of serving UE can be informed macro base station tabulation of UE around it, makes UE to measure the signal of macro base station around it, so that it switches to macro base station.
When UE when macro base station switches to Home eNodeB: because the coverage of Home eNodeB is smaller, and macro base station can not read the information of other sub-district by eating dishes without rice or wine usually, therefore, macro base station can't be known its distribution situation of Home eNodeB on every side, also just the correlation circumstance of contiguous Home eNodeB can't be issued UE, this causes UE to measure the Home eNodeB signal around it, thereby causes UE to switch to Home eNodeB from macro base station.
In addition, Home eNodeB can produce the influence of disturbing and being interfered inevitably as a kind of wireless device.This interference mainly shows as Home eNodeB and the interference between the macro base station under it.As previously mentioned, Home eNodeB is primarily aimed among a small circle and uses, and the scope that it covered belongs within the coverage of a certain macro base station usually, below this macro base station is called the affiliated macro base station of this Home eNodeB.If the transmitting power of Home eNodeB strengthens, around macro base station, will form emptyly, that is: communicating by letter between macro base station and the UE is subjected to the strong interference of Home eNodeB, to such an extent as to can not proper communication between macro base station and the UE.If the transmitting power of Home eNodeB is too little, will cause the Home eNodeB coverage to be dwindled, can't reach its due coverage.Therefore, need reasonably adjust the transmitting power of Home eNodeB, controlling the interference of Home eNodeB effectively, between the coverage of Home eNodeB and interference, to reach balance to macro base station to macro base station and UE.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method of macro base station UE incision Home eNodeB, comprise its Neighboring Cell List of the relevant information of Home eNodeB on every side so that macro base station UE can get access to, thereby make UE switch to Home eNodeB from macro base station.
Another object of the present invention is to provide a kind of method of controlling the interference of Home eNodeB, to reach balance between the coverage of Home eNodeB and the interference to macro base station.
For achieving the above object, the invention provides a kind of method of macro base station UE incision Home eNodeB, comprising:
A, be in all Home eNodeB in the macro base station coverage and carry out uplink network to described macro base station and insert, notifying described macro base station himself is Home eNodeB, and himself identification information is sent to macro base station;
B, macro base station estimate to be in its coverage the geographical position of user terminal UE of activated state and the geographical position of described all Home eNodeB;
C, macro base station be according to the UE geographical position of described estimation and the geographical position of Home eNodeB, determines the Home eNodeB contiguous with the UE geographical position, and the information of the Home eNodeB of described vicinity is included in sends to UE in the Neighboring Cell List.
Before described step C, may further include: C0, UE search for the macro base station around it and the signal of Home eNodeB, determine its all Home eNodeB on every side, and the information of all Home eNodeB around it is reported macro base station;
Described step C is: macro base station is according to the UE geographical position of described estimation and the geographical position of Home eNodeB, and described UE report its around the information of all Home eNodeB, determine the Home eNodeB contiguous, and the information of the Home eNodeB of described vicinity is included in sends to UE in the Neighboring Cell List with the UE geographical position.
In the described steps A Home eNodeB to macro base station carry out mode that uplink network inserts can for: Home eNodeB start back sends up access sequence to macro base station, or Home eNodeB periodically sends up access sequence to macro base station.
Preferably, described up access sequence is: set in advance special up access sequence;
It himself is that the mode of Home eNodeB is that Home eNodeB described in the steps A is notified described macro base station: by sending described special up access sequence notice macro base station himself is Home eNodeB.
Preferably, described up access sequence is: common up access sequence;
It himself is that the mode of Home eNodeB is that Home eNodeB described in the steps A is notified described macro base station: after inserting macro base station, to notify described macro base station himself be Home eNodeB by carrying out interacting message with macro base station.
The identification information of the described Home eNodeB of steps A can comprise: the unique identification of described Home eNodeB and/or sub-district physical label;
The information that is included in the Home eNodeB in the Neighboring Cell List described in the step C can be the identification information of frequency, broadcast channel power and described Home eNodeB that described Home eNodeB is used.
Preferably, described step B can comprise:
B1, macro base station estimate the angle of arrival AOA and the up Timing Advance TA of Home eNodeB according to the upstream data of received Home eNodeB, and the geographical position of estimating described Home eNodeB according to the AOA and the TA of described Home eNodeB; Perhaps, Home eNodeB reports the time difference OTDOA of the pilot tone of the auxiliary macro base station in observed at least three positions from the auxiliary macro base station arrival in the position of correspondence Home eNodeB to macro base station, the OTDOA that macro base station reports according to described Home eNodeB adopts hyperbola positioning method to estimate the geographical position of described Home eNodeB; Perhaps, at least three auxiliary macro base stations in position are determined corresponding TA by the ascending pilot frequency of described Home eNodeB, determine difference between each TA by described macro base station, and adopt up arrival time difference U-TDOA hyperbola positioning method to estimate the geographical position of described Home eNodeB; Perhaps, the global navigation satellite system GNSS mode of employing network assistance is estimated the geographical position of described Home eNodeB;
B2, macro base station estimate AOA and the TA of UE according to the upstream data of received UE, and the geographical position of estimating described UE according to AOA and the TA of described UE; Perhaps, UE reports the time difference OTDOA of the pilot tone of the auxiliary macro base station in observed at least three positions from the auxiliary macro base station arrival in the position of correspondence UE to macro base station, the OTDOA that macro base station reports according to described UE adopts hyperbola positioning method to estimate the geographical position of described UE; Perhaps, the auxiliary macro base stations at least three positions are determined different TA by the ascending pilot frequency of described UE, determine difference between different TA by described macro base station, and adopt the U-TDOA hyperbola positioning method to estimate the geographical position of described UE; Perhaps, the GNSS mode of employing network assistance is estimated the geographical position of described UE.
Preferably, the information of all Home eNodeB can comprise around its that UE reports to macro base station among the described step C0: the used frequency of all Home eNodeB around it, and the unique identification of described Home eNodeB and/or sub-district physical label.
The present invention also provides a kind of method of controlling the interference of Home eNodeB, comprising:
A, be in all Home eNodeB in the macro base station coverage and carry out uplink network to described macro base station and insert, notifying described macro base station himself is Home eNodeB, and himself identification information is sent to macro base station;
B, UE search for the macro base station around it and the signal of Home eNodeB, determine the strong jamming Home eNodeB of described UE, and cell ID, interference strength and the path loss situation of described strong jamming Home eNodeB reported macro base station;
C, macro base station estimate to be in its coverage the geographical position of user terminal UE of activated state and the geographical position of described all Home eNodeB;
D, macro base station are according to the UE geographical position of described estimation and the geographical position of Home eNodeB, determine the Home eNodeB contiguous with the UE geographical position, and the strong jamming Home eNodeB that reports according to the contiguous Home eNodeB in described definite and UE geographical position and described UE, determine to disturb Home eNodeB, and with interference strength and the path loss advisory described interference Home eNodeB of described interference Home eNodeB to described macro base station;
E, described interference Home eNodeB are according to the notice of macro base station, and the path loss situation that UE reported of himself serving, and adjust the size of the transmitting power of described interference Home eNodeB.
Preferably, among the described step a Home eNodeB to macro base station carry out mode that uplink network inserts can for: Home eNodeB start back sends up access sequence to macro base station, or Home eNodeB periodically sends up access sequence to macro base station.
Preferably, described up access sequence is: set in advance special up access sequence;
To notify described macro base station himself be that the mode of Home eNodeB is to Home eNodeB among the described step a: by sending described special up access sequence notice macro base station himself is Home eNodeB.
Preferably, described up access sequence is: common up access sequence;
To notify described macro base station himself be that the mode of Home eNodeB is to Home eNodeB among the described step a: after inserting macro base station, to notify described macro base station himself be Home eNodeB by carrying out interacting message with macro base station.
Described step c can comprise:
C1, macro base station estimate the angle of arrival AOA and the up Timing Advance TA of Home eNodeB according to the upstream data of received Home eNodeB, and the geographical position of estimating described Home eNodeB according to the AOA and the TA of described Home eNodeB; Perhaps, Home eNodeB reports the pilot tone of the auxiliary macro base station in observed at least three positions to arrive Home eNodeB time difference OTDOA from the auxiliary macro base station in the position of correspondence to macro base station, the OTDOA that macro base station reports according to described Home eNodeB adopts hyperbola positioning method to estimate the geographical position of described Home eNodeB; Perhaps, the TA of macro base station by the definite correspondence of the ascending pilot frequency of described Home eNodeB assisted at least three positions, determine difference between each TA by described macro base station, and adopt up arrival time difference U-TDOA hyperbola positioning method to estimate the geographical position of described Home eNodeB; Perhaps, the global navigation satellite system GNSS mode of employing network assistance is estimated the geographical position of described Home eNodeB;
C2, macro base station estimate AOA and the TA of UE according to the upstream data of received UE, and the geographical position of estimating described UE according to AOA and the TA of described UE; Perhaps, UE reports the time difference OTDOA of the pilot tone of the auxiliary macro base station in observed at least three positions from the auxiliary macro base station arrival in the position of correspondence UE to macro base station, the OTDOA that macro base station reports according to described UE adopts hyperbola positioning method to estimate the geographical position of described UE; Perhaps, the auxiliary macro base stations at least three positions are determined corresponding TA by the ascending pilot frequency of described UE, determine difference between each TA by described macro base station, and adopt the U-TDOA hyperbola positioning method to estimate the geographical position of described UE; Perhaps, the GNSS mode of employing network assistance is estimated the geographical position of described UE.
Information exchange between described Home eNodeB and the macro base station can by eat dishes without rice or wine, the X2 interface in the Long Term Evolution plan LTE system, TD SDMA inserts in the TD-SDCMA system or Wideband Code Division Multiple Access (WCDMA) inserts core net in the WCDMA system and the interface between femto gateway or the related network elements carries out.
As seen from the above technical solution, in the method for macro base station UE incision Home eNodeB provided by the invention, at first by Home eNodeB himself being carried out uplink network as the role of the UE of macro base station to this macro base station inserts, and inform that macro base station himself is a Home eNodeB, make macro base station can know the correlation circumstance of all Home eNodeB in its coverage, then, by macro base station in conjunction with estimation to the geographical position of the UE that is in activated state in its coverage, and the estimation in the geographical position of Home eNodeB, determine the Home eNodeB contiguous with the UE geographical position, at last, the information of the Home eNodeB that these are contiguous is included in and sends to UE in the Neighboring Cell List, thereby UE is got access to comprise the Neighboring Cell List of the relevant information of Home eNodeB around it, and then make UE switch to Home eNodeB to become possibility from macro base station.
In addition, in the method for the interference of control Home eNodeB provided by the invention, at first by Home eNodeB himself being carried out uplink network as the role of the UE of macro base station to this macro base station inserts, and inform that macro base station himself is a Home eNodeB, make macro base station can know the correlation circumstance of all Home eNodeB in its coverage, and the macro base station around it and the signal of Home eNodeB are searched for by UE, determine the strong jamming Home eNodeB of this UE, and the interference strength and the path loss situation of this strong jamming Home eNodeB reported macro base station, then, by macro base station according to the UE that estimates and the geographical position of Home eNodeB, and the situation of the strong jamming Home eNodeB that reports of UE is compared, determine to disturb Home eNodeB, and the interference strength and the path loss situation of this interference Home eNodeB that UE is measured send to corresponding Home eNodeB, at last, by the notice of Home eNodeB according to macro base station, and the path loss situation that UE reported of himself serving, adjust the size of the transmitting power of this Home eNodeB self, thereby realized the coverage of Home eNodeB and the balance between the interference of macro base station.
Description of drawings
Fig. 1 is the schematic flow sheet of the method for macro base station UE incision Home eNodeB in the embodiment of the invention one;
Fig. 2 is the schematic flow sheet of the method for macro base station UE incision Home eNodeB in the embodiment of the invention two;
Fig. 3 is the schematic flow sheet of the method for the interference of control Home eNodeB in the embodiment of the invention three.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
Main thought of the present invention is: by Home eNodeB himself is carried out uplink network as the role of the UE of macro base station to this macro base station and insert, and inform that macro base station himself is a Home eNodeB, make macro base station can know the correlation circumstance of all Home eNodeB in its coverage.Then, in conjunction with the estimation of macro base station to the geographical position of the estimation in the geographical position of the UE that is in activated state in its coverage and Home eNodeB, determine the Home eNodeB contiguous with the UE geographical position, and the information of the Home eNodeB that these are contiguous is included in and sends to UE in the Neighboring Cell List, thereby UE can be got access to comprise the Neighboring Cell List of the relevant information of Home eNodeB around it, and then make UE switch to Home eNodeB to become possibility from macro base station.
Based on above-mentioned main thought, the invention allows for a kind of method of controlling the interference of Home eNodeB.This method is on the basis of above-mentioned main thought, further the macro base station around it and the signal of Home eNodeB are searched for by UE, determine the strong jamming Home eNodeB of this UE, and the interference strength and the path loss situation of this strong jamming Home eNodeB reported macro base station, by macro base station according to the UE that estimates and the geographical position of Home eNodeB, and the situation of the strong jamming Home eNodeB that reports of UE is compared, determine to disturb Home eNodeB, and the interference strength and the path loss situation of this interference Home eNodeB that UE is measured send to corresponding Home eNodeB, by the notice of Home eNodeB according to macro base station, and the path loss situation that UE reported of himself serving, adjust the size of the transmitting power of this Home eNodeB self, thereby realized the coverage of Home eNodeB and the balance between the interference of macro base station.
Developing simultaneously below in conjunction with accompanying drawing, the present invention is described in detail for embodiment:
Fig. 1 is the schematic flow sheet of the method for macro base station UE incision Home eNodeB in the embodiment of the invention one.Referring to Fig. 1, this method comprises:
Step 101: be in all Home eNodeB in the macro base station coverage and carry out uplink network to this macro base station and insert, notifying this macro base station himself is Home eNodeB, and himself identification information is sent to macro base station.
In this step, Home eNodeB to the mode that macro base station carries out the uplink network access is: Home eNodeB start back sends up access sequence to macro base station, perhaps, periodically sends up access sequence to macro base station by Home eNodeB.Since the position of Home eNodeB can frequent updating or install after generally can not become, therefore, Home eNodeB need not to initiate to insert to macro base station continually, so, when take periodically when macro base station sends this mode of up access sequence the family base station, can initiate to insert with the very long cycle.
In actual applications, can set in advance special up access sequence, when the family base station by this special up access sequence when macro base station initiate to insert, macro base station just can know directly that the true identity of this Home eNodeB is one family base station but not UE.
When special up access sequence not being set specially being used for Home eNodeB to the access of macro base station, Home eNodeB also can initiate to insert to macro base station by sending common up access sequence, and informs that in follow-up message interaction process macro base station himself is a Home eNodeB.
In this step, Home eNodeB sends to macro base station, and the identification information of himself can be: unique identification of this Home eNodeB (that is: sub-district ID) or sub-district physical I D, perhaps, also can issue macro base station with the both.
Step 102: macro base station estimates to be in its coverage the geographical position of UE of activated state and the geographical position of all Home eNodeB.
In this step, macro base station can take following mode to carry out the estimation in UE and Home eNodeB geographical position:
For Home eNodeB, macro base station can be estimated the angle of arrival (AOA) and the up Timing Advance (TA) of Home eNodeB according to the upstream data of received Home eNodeB, and the geographical position of estimating this Home eNodeB according to the AOA and the TA of this Home eNodeB; Perhaps, Home eNodeB can report the pilot tone of the auxiliary macro base station in its viewed at least three positions to arrive Home eNodeB time difference OTDOA from the auxiliary macro base station in the position of correspondence to macro base station, and, adopt hyperbola positioning method to estimate the geographical position of described Home eNodeB by the OTDOA that macro base station reports according to this Home eNodeB; Or, determine corresponding TA by the auxiliary macro base station at least three positions by the ascending pilot frequency of this Home eNodeB, determine difference between each TA that the auxiliary macro base station in these positions reported by this macro base station again, and adopt up arrival time difference (U-TDOA) hyperbola positioning method to estimate the geographical position of this Home eNodeB; Or, also can adopt network navigation satellite system (GNSS) mode of network assistance to estimate the geographical position of this Home eNodeB.
Similarly, for UE, macro base station can be estimated AOA and the TA of UE according to the upstream data of received UE, and the geographical position of estimating this UE according to AOA and the TA of this UE; Perhaps, UE can report the pilot tone of the auxiliary macro base station in its viewed at least three positions to arrive the time difference OTDOA of UE from the auxiliary macro base station in the position of correspondence to macro base station, and is estimated the geographical position of this UE by the OTDOA employing hyperbola positioning method that macro base station reports according to this UE; Perhaps, determine corresponding TA by the auxiliary macro base station at least three positions by the ascending pilot frequency of this UE, determine difference between each TA that the auxiliary macro base station in these positions reported by this macro base station again, and adopt the U-TDOA hyperbola positioning method to estimate the geographical position of this UE; Or the GNSS mode of employing network assistance is estimated the geographical position of this UE.
Step 103: macro base station is according to the estimated UE geographical position and the geographical position of Home eNodeB, determines the Home eNodeB contiguous with the UE geographical position, and the information of the Home eNodeB that these are contiguous is included in and sends to UE in the Neighboring Cell List.
In this step, the information that is included in the Home eNodeB in the Neighboring Cell List can comprise: the identification information of frequency, broadcast channel power and this Home eNodeB that Home eNodeB is used etc.
So far, finish the method for present embodiment macro base station UE incision Home eNodeB.
After using the Neighboring Cell List of information that said method gets access to UE to comprise its contiguous Home eNodeB, UE can measure the signal of these contiguous Home eNodeB, thereby prepares for switching.
Fig. 2 is the schematic flow sheet of the method for macro base station UE incision Home eNodeB in the embodiment of the invention two.Referring to Fig. 2, the method comprising the steps of 201～204, and wherein, step 201～202 are identical with step 101～102 in the method flow shown in Figure 1.Method shown in Figure 2 specifically may further comprise the steps:
Step 201: be in all Home eNodeB in the macro base station coverage and carry out uplink network to this macro base station and insert, notifying this macro base station himself is Home eNodeB, and himself identification information is sent to macro base station.
In this step, the concrete mode that Home eNodeB is initiated access to macro base station is identical with above-mentioned steps 101, does not repeat them here.
Step 202: macro base station estimates to be in its coverage the geographical position of UE of activated state and the geographical position of all Home eNodeB.
In this step, the concrete mode in the geographical position of macro base station estimation UE and Home eNodeB is identical with above-mentioned steps 102, does not repeat them here.
Step 203:UE searches for the macro base station around it and the signal of Home eNodeB, determines its all Home eNodeB on every side, and the information of all Home eNodeB around it is reported macro base station.
In this step, UE report to macro base station its around the information of all Home eNodeB can comprise: the used frequency of all Home eNodeB around it, and unique ID of these Home eNodeB and/or sub-district physical I D.
Step 204: macro base station is according to the estimated UE geographical position and the geographical position of Home eNodeB, and UE report its around the information of all Home eNodeB, determine the Home eNodeB contiguous, and information of these contiguous Home eNodeB are included in send to UE in the Neighboring Cell List with the UE geographical position.
In this step, the information that is included in the Home eNodeB in the Neighboring Cell List can comprise: the identification information of frequency, broadcast channel power and this Home eNodeB that Home eNodeB is used etc.
So far, finish the method for present embodiment macro base station UE incision Home eNodeB.
As seen from the above-described embodiment, in the method for macro base station UE incision Home eNodeB provided by the invention, at first by Home eNodeB himself being carried out uplink network as the role of the UE of macro base station to this macro base station inserts, and inform that macro base station himself is a Home eNodeB, make macro base station can know the correlation circumstance of all Home eNodeB in its coverage, then, by macro base station in conjunction with estimation to the geographical position of the UE that is in activated state in its coverage, and the estimation in the geographical position of Home eNodeB, determine the Home eNodeB contiguous with the UE geographical position, at last, the information of the Home eNodeB that these are contiguous is included in and sends to UE in the Neighboring Cell List, thereby UE is got access to comprise the Neighboring Cell List of the relevant information of Home eNodeB around it, and then make UE switch to Home eNodeB to become possibility from macro base station.
Fig. 3 is the schematic flow sheet of the method for the interference of control Home eNodeB in the embodiment of the invention three.Referring to Fig. 3, this method comprises:
Step 301: be in all Home eNodeB in the macro base station coverage and carry out uplink network to this macro base station and insert, notifying this macro base station himself is Home eNodeB, and himself identification information is sent to macro base station.
In this step, the concrete mode that Home eNodeB is initiated access to macro base station is identical with above-mentioned steps 101, does not repeat them here.
Step 302:UE searches for the macro base station around it and the signal of Home eNodeB, determines the strong jamming Home eNodeB of UE, and cell ID, interference strength and the path loss situation of this strong jamming Home eNodeB reported macro base station.
Step 303: macro base station estimates to be in its coverage the geographical position of UE of activated state and the geographical position of all Home eNodeB.
In this step, the concrete mode in the geographical position of macro base station estimation UE and Home eNodeB is identical with above-mentioned steps 102, does not repeat them here.
Step 304: macro base station is according to the estimated UE geographical position and the geographical position of Home eNodeB, determine the Home eNodeB contiguous with the UE geographical position, and the strong jamming Home eNodeB that reports according to the contiguous Home eNodeB in determined and UE geographical position and UE, determine to disturb Home eNodeB, and will disturb Home eNodeB interference strength and this interference Home eNodeB of path loss advisory macro base station.
Step 305: disturb the notice of Home eNodeB, and the path loss situation that UE reported of himself serving, adjust the size of himself transmitting power according to macro base station.
In this step, the interference Home eNodeB can be in conjunction with its interference strength and path loss situation to macro base station of macro base station notice, and the path loss situation that UE reported of himself serving, determine how the transmitting power of himself to be adjusted, thereby reach the coverage of Home eNodeB and the balance between the interference of macro base station.
So far, finish the method for the interference of present embodiment control Home eNodeB.
Information exchange between above-mentioned Home eNodeB and the macro base station can be by eating dishes without rice or wine or other interface carries out.For example: if in Long Term Evolution plan (LTE) system, can be undertaken by X2 interface, if TD-SDCMA system or WCDMA system, so, can be undertaken, perhaps be undertaken by the interface between core net and other related network elements by the interface between core net and the femto gateway.
As seen from the above-described embodiment, in the method for the interference of control Home eNodeB provided by the invention, at first by Home eNodeB himself being carried out uplink network as the role of the UE of macro base station to this macro base station inserts, and inform that macro base station himself is a Home eNodeB, make macro base station can know the correlation circumstance of all Home eNodeB in its coverage, and the macro base station around it and the signal of Home eNodeB are searched for by UE, determine the strong jamming Home eNodeB of this UE, and the interference strength and the path loss situation of this strong jamming Home eNodeB reported macro base station, then, by macro base station according to the UE that estimates and the geographical position of Home eNodeB, and the situation of the strong jamming Home eNodeB that reports of UE is compared, determine to disturb Home eNodeB, and the interference strength and the path loss situation of this interference Home eNodeB that UE is measured send to corresponding Home eNodeB, at last, by the notice of Home eNodeB according to macro base station, and the path loss situation that UE reported of himself serving, adjust the size of the transmitting power of this Home eNodeB self, thereby realized the coverage of Home eNodeB and the balance between the interference of macro base station.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.All any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. the method for a macro base station UE incision Home eNodeB is characterized in that, comprising:
A, be in all Home eNodeB in the macro base station coverage and carry out uplink network to described macro base station and insert, notifying described macro base station himself is Home eNodeB, and himself identification information is sent to macro base station;
B, macro base station estimate to be in its coverage the geographical position of user terminal UE of activated state and the geographical position of described all Home eNodeB;
C, macro base station be according to the UE geographical position of described estimation and the geographical position of Home eNodeB, determines the Home eNodeB contiguous with the UE geographical position, and the information of the Home eNodeB of described vicinity is included in sends to UE in the Neighboring Cell List.
2. method according to claim 1 is characterized in that:
Before described step C, this method further comprises: C0, UE search for the macro base station around it and the signal of Home eNodeB, determine its all Home eNodeB on every side, and the information of all Home eNodeB around it is reported macro base station;
Described step C is: macro base station is according to the UE geographical position of described estimation and the geographical position of Home eNodeB, and described UE report its around the information of all Home eNodeB, determine the Home eNodeB contiguous, and the information of the Home eNodeB of described vicinity is included in sends to UE in the Neighboring Cell List with the UE geographical position.
3. method according to claim 1 and 2 is characterized in that:
Home eNodeB to the mode that macro base station carries out the uplink network access is in the described steps A: Home eNodeB start back sends up access sequence to macro base station, or Home eNodeB periodically sends up access sequence to macro base station.
4. method according to claim 3 is characterized in that:
Described up access sequence is: set in advance special up access sequence;
It himself is that the mode of Home eNodeB is that Home eNodeB described in the steps A is notified described macro base station: by sending described special up access sequence notice macro base station himself is Home eNodeB.
5. method according to claim 3 is characterized in that:
Described up access sequence is: common up access sequence;
It himself is that the mode of Home eNodeB is that Home eNodeB described in the steps A is notified described macro base station: after inserting macro base station, to notify described macro base station himself be Home eNodeB by carrying out interacting message with macro base station.
6. method according to claim 1 and 2 is characterized in that:
The identification information of the described Home eNodeB of steps A comprises: the unique identification of described Home eNodeB and/or sub-district physical label;
The information that is included in the Home eNodeB in the Neighboring Cell List described in the step C is: the identification information of frequency, broadcast channel power and described Home eNodeB that described Home eNodeB is used.
7. method according to claim 1 and 2 is characterized in that, described step B comprises:
B1, macro base station estimate the angle of arrival AOA and the up Timing Advance TA of Home eNodeB according to the upstream data of received Home eNodeB, and the geographical position of estimating described Home eNodeB according to the AOA and the TA of described Home eNodeB; Perhaps, Home eNodeB reports the time difference OTDOA of the pilot tone of the auxiliary macro base station in observed at least three positions from the auxiliary macro base station arrival in the position of correspondence Home eNodeB to macro base station, the OTDOA that macro base station reports according to described Home eNodeB adopts hyperbola positioning method to estimate the geographical position of described Home eNodeB; Perhaps, at least three auxiliary macro base stations in position are determined corresponding TA by the ascending pilot frequency of described Home eNodeB, determine difference between each TA by described macro base station, and adopt up arrival time difference U-TDOA hyperbola positioning method to estimate the geographical position of described Home eNodeB; Perhaps, the global navigation satellite system GNSS mode of employing network assistance is estimated the geographical position of described Home eNodeB;
B2, macro base station estimate AOA and the TA of UE according to the upstream data of received UE, and the geographical position of estimating described UE according to AOA and the TA of described UE; Perhaps, UE reports the time difference OTDOA of the pilot tone of the auxiliary macro base station in observed at least three positions from the auxiliary macro base station arrival in the position of correspondence UE to macro base station, the OTDOA that macro base station reports according to described UE adopts hyperbola positioning method to estimate the geographical position of described UE; Perhaps, the auxiliary macro base stations at least three positions are determined different TA by the ascending pilot frequency of described UE, determine difference between different TA by described macro base station, and adopt the U-TDOA hyperbola positioning method to estimate the geographical position of described UE; Perhaps, the GNSS mode of employing network assistance is estimated the geographical position of described UE.
8. method according to claim 2 is characterized in that:
The information of all Home eNodeB comprises around its that UE reports to macro base station among the described step C0: the used frequency of all Home eNodeB around it, and the unique identification of described Home eNodeB and/or sub-district physical label.
9. a method of controlling the interference of Home eNodeB is characterized in that, comprising:
A, be in all Home eNodeB in the macro base station coverage and carry out uplink network to described macro base station and insert, notifying described macro base station himself is Home eNodeB, and himself identification information is sent to macro base station;
B, UE search for the macro base station around it and the signal of Home eNodeB, determine the strong jamming Home eNodeB of described UE, and cell ID, interference strength and the path loss situation of described strong jamming Home eNodeB reported macro base station;
C, macro base station estimate to be in its coverage the geographical position of user terminal UE of activated state and the geographical position of described all Home eNodeB;
D, macro base station are according to the UE geographical position of described estimation and the geographical position of Home eNodeB, determine the Home eNodeB contiguous with the UE geographical position, and the strong jamming Home eNodeB that reports according to the contiguous Home eNodeB in described definite and UE geographical position and described UE, determine to disturb Home eNodeB, and with interference strength and the path loss advisory described interference Home eNodeB of described interference Home eNodeB to described macro base station;
E, described interference Home eNodeB are according to the notice of macro base station, and the path loss situation that UE reported of himself serving, and adjust the size of the transmitting power of described interference Home eNodeB.
10. method according to claim 9 is characterized in that:
Home eNodeB to the mode that macro base station carries out the uplink network access is among the described step a: Home eNodeB start back sends up access sequence to macro base station, or Home eNodeB periodically sends up access sequence to macro base station.
11. method according to claim 10 is characterized in that:
Described up access sequence is: set in advance special up access sequence;
To notify described macro base station himself be that the mode of Home eNodeB is to Home eNodeB among the described step a: by sending described special up access sequence notice macro base station himself is Home eNodeB.
12. method according to claim 10 is characterized in that:
Described up access sequence is: common up access sequence;
To notify described macro base station himself be that the mode of Home eNodeB is to Home eNodeB among the described step a: after inserting macro base station, to notify described macro base station himself be Home eNodeB by carrying out interacting message with macro base station.
13. method according to claim 10 is characterized in that, described step c comprises:
C1, macro base station estimate the angle of arrival AOA and the up Timing Advance TA of Home eNodeB according to the upstream data of received Home eNodeB, and the geographical position of estimating described Home eNodeB according to the AOA and the TA of described Home eNodeB; Perhaps, Home eNodeB reports the pilot tone of the auxiliary macro base station in observed at least three positions to arrive Home eNodeB time difference OTDOA from the auxiliary macro base station in the position of correspondence to macro base station, the OTDOA that macro base station reports according to described Home eNodeB adopts hyperbola positioning method to estimate the geographical position of described Home eNodeB; Perhaps, the TA of macro base station by the definite correspondence of the ascending pilot frequency of described Home eNodeB assisted at least three positions, determine difference between each TA by described macro base station, and adopt up arrival time difference U-TDOA hyperbola positioning method to estimate the geographical position of described Home eNodeB; Perhaps, the global navigation satellite system GNSS mode of employing network assistance is estimated the geographical position of described Home eNodeB;
C2, macro base station estimate AOA and the TA of UE according to the upstream data of received UE, and the geographical position of estimating described UE according to AOA and the TA of described UE; Perhaps, UE reports the time difference OTDOA of the pilot tone of the auxiliary macro base station in observed at least three positions from the auxiliary macro base station arrival in the position of correspondence UE to macro base station, the OTDOA that macro base station reports according to described UE adopts hyperbola positioning method to estimate the geographical position of described UE; Perhaps, the auxiliary macro base stations at least three positions are determined corresponding TA by the ascending pilot frequency of described UE, determine difference between each TA by described macro base station, and adopt the U-TDOA hyperbola positioning method to estimate the geographical position of described UE; Perhaps, the GNSS mode of employing network assistance is estimated the geographical position of described UE.
14. method according to claim 10 is characterized in that:
Information exchange between described Home eNodeB and the macro base station by eat dishes without rice or wine, the X2 interface in the Long Term Evolution plan LTE system, TD SDMA inserts in the TD-SDCMA system or Wideband Code Division Multiple Access (WCDMA) inserts core net in the WCDMA system and the interface between femto gateway or the related network elements carries out.
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