CN105356951A - Base station signal calibration method, base station and system - Google Patents
Base station signal calibration method, base station and system Download PDFInfo
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Abstract
The invention provides a base station signal calibration method, a base station and a system. The base station signal calibration method includes the following steps that: a first base station sends a calibration request to a second base station through an X2 interface; the first base station determines a common spare resource of a neighbor cell of the first base station and the second base station through a share resource fed back by the X2 interface after the second base station receives the calibration request; the first base station generates a first calibrated signal, and sends the first calibrated signal to the second base station through an air interface, on the common spare resource; the first base station receives a first calibration parameter which is generated by the second base station according to the first calibrated, and the second base station generates a second calibrated signal; the first base station generates a second calibration parameter according to the second calibrated signal; and the first base station performs signal calibration of a cell of the first base station according to the first calibration parameter and the second calibration parameter. According to the invention, the problem that different sites cannot directly connected by cables, the accuracy of a calibrated signal is improved, and interference between the calibrated signal and a common user equipment signal can be avoided.
Description
Technical field
The present invention relates to wireless technical field, particularly a kind of base station signal calibration steps, base station and system.
Background technology
Along with the development of multi-antenna technology, 3D-MIMO (multiple-input and multiple-output) becomes the focus that industry is paid close attention to.Compared with conventional MIMO system, 3D-MIMO can support three-dimensional beam forming, thus improves the flexibility of covering, and improves cell capacity.
Meanwhile, 3D-MIMO system also brings new challenge, and in conventional MIMO system, antenna is configured to relatively-stationary angle of declination, can drop to minimum by overlapping covered for multiple community, thus avoid the interference of minizone by plot planning.But in 3D-MIMO system, signal can send to any direction in space, if the wave beam of adjacent Liang Ge community all points to same position, then can cause serious interference.Therefore need to carry out minizone cooperation, to avoid interference.
Multi-cell cooperating (CoMP) is one of effective means solving presence of intercell interference.For 3D-MIMO system, minizone cooperative beam excipient is a kind of feasible scheme.Meanwhile, if joint transmission can be carried out between neighbor cell, then can further improve subscriber signal quality.Multiple community being carried out to the relevant joint transmission scheme of associating precoding, usually needing the multiple communities to participating in joint transmission to carry out antenna calibration, to compensate the relative error between the radio frequency unit of different districts.
Current antenna calibration mainly contains two schemes:
The first scheme is the scheme connected based on cable, is directly connected by multiple RRU (Remote Radio Unit) by cable, mutually sends calibrating signal each other and calculates calibration parameter.This scheme is limited to the loss of cable transmission, and the multiple minizones being only applicable to colocation site are calibrated, and cannot support to calibrate between Yi Zhan community.
First scheme is the air interface transmission scheme based on terminal feedback, is measured the calibrating signal of multiple community transmission by terminal, calculates difference each other, and feeds back to base station for compensation for calibrating errors.This scheme needs to depend on terminal and measures and feedback, and current terminal does not support this function.As mentioned above, existing antenna calibration algorithm can not support the calibration of minizone, different site effectively.
In traditional base station, interference is avoided being the basic principle of multiple cell networking, is difficult to occur that adjacent base station receives the situation of signal each other; And in 3D-MIMO system, because three-dimensional wave beam forming is supported in base station, when base station distance is nearer, directly may receive the signal that the other side sends each other.
Summary of the invention
The object of the present invention is to provide a kind of base station signal calibration steps, base station and system, solve problem cable cannot being used direct-connected between different site, effectively prevent the interference between calibrating signal and service signal simultaneously.
In order to achieve the above object, the embodiment of the present invention provides a kind of base station signal calibration steps, comprising:
First base station sends calibration request by X2 interface to the second base station;
The idling-resource that first base station is fed back by X2 interface after receiving described calibration request according to the second base station, determines the common free resource of the neighbor cell of the first base station and the second base station;
First base station generates the first calibrating signal, and in described common free resource, sends to the second base station by eating dishes without rice or wine;
First base station receives the second calibrating signal that the second base station generates according to the first calibration parameter of described first calibrating signal generation and the second base station;
First base station generates the second calibration parameter according to described second calibrating signal;
The signal calibration of the community of the first base station is carried out according to described first calibration parameter and described second calibration parameter in first base station.
Wherein, after the first base station receives described calibration request according to the second base station, the idling-resource fed back by X2 interface, determine that the step of the common free resource of the neighbor cell of the first base station and the second base station comprises:
First base station receives the information of the second community in described second base station range that feeds back according to described calibration request the second base station and the current idle resource of described second community;
First community adjacent with described second community, according to the information of described second community, in the coverage of described first base station, is selected in first base station;
The current idle resource of the first base station according to described first community and the current idle resource of the second community, determine the common free resource of the first community and the second community.
Wherein, the first base station generates the first calibrating signal, and in described common free resource, sends to the step of the second base station to comprise by eating dishes without rice or wine:
First base station selected pre-coding matrix, and generate the first calibrating signal according to pre-coding matrix;
Described first calibrating signal by eating dishes without rice or wine, is sent to the second base station, and by X2 interface, described pre-coding matrix is sent to the second base station in described common free resource by the first base station.
Wherein, the first base station receives the first calibration parameter that the second base station generates according to described first calibrating signal and the step of the second calibrating signal that the second base station generates comprises:
The second calibrating signal that first base station is generated in described common free resource by reception second base station of eating dishes without rice or wine, and the first calibration parameter of the second base station feedback is received by X2 interface, described first calibration parameter is that the second base station generates according to described first calibrating signal, described second calibrating signal is the second base station selected pre-coding matrix, and generate according to pre-coding matrix.
Wherein, described method also comprises:
First base station receives the second base station selected precoding matrix information by X2 interface.
Wherein, the step that the signal calibration of the community of the first base station is carried out according to described first calibration parameter and described second calibration parameter in the first base station comprises:
First base station, according to described first calibration parameter and the second calibration parameter, obtains the first calibration factor of the first base station;
First base station, according to described first calibration factor, is calibrated the signal of the community of described first base station.
Wherein, described first community and described second community are determined by the neighbor cell configuration list of described first base station and described second base station, or are determined by the mode that described first base station and described second base station detect synchronizing channel mutually.
Wherein, described common free resource is wireless signal time slot or the Resource Block of eating dishes without rice or wine.
Wherein, the defining method of described pre-coding matrix comprises:
Described first base station and the described second mutual interception reference signal in base station, obtain forward-link channel information, and obtain the channel matrix of reverse link according to described forward-link channel information, calculate pre-coding matrix; Or,
By X2 interface, forward-link channel information is fed back to the first base station or the second base station, calculate pre-coding matrix; Or,
Pre-coding matrix is chosen from the encoder matrix set preset.
The embodiment of the present invention also provides a kind of base station, comprising:
First sending module, for sending calibration request by X2 interface to the second base station;
Determination module, after receiving described calibration request according to the second base station, the idling-resource fed back by X2 interface, determines the common free resource of the neighbor cell of the first base station and the second base station;
Second sending module, for generating the first calibrating signal, and sends to the second base station by eating dishes without rice or wine in described common free resource;
Receiver module, for receiving the second calibrating signal that the second base station generates according to the first calibration parameter of described first calibrating signal generation and the second base station;
Generation module, for generating the second calibration parameter according to described second calibrating signal;
Calibration module, for carrying out the signal calibration of the community of the first base station according to described first calibration parameter and described second calibration parameter.
Wherein, described determination module comprises:
First determines submodule, for receiving the information of the second community in described second base station range that feeds back according to described calibration request the second base station and the current idle resource of described second community;
Second determines submodule, for the information according to described second community, in the coverage of described first base station, selects first community adjacent with described second community;
3rd determines submodule, for according to the current idle resource of described first community and the current idle resource of the second community, determines the common free resource of the first community and the second community.
Wherein, described second sending module comprises:
Second sends submodule, for selecting pre-coding matrix, and generate the first calibrating signal according to pre-coding matrix, by eating dishes without rice or wine in described common free resource, described first calibrating signal is sent to the second base station, and sends to the second base station by pre-coding matrix described in X2 interface.
Wherein, described receiver module comprises:
First receives submodule, for the second calibrating signal generated in described common free resource by reception second base station of eating dishes without rice or wine, and the first calibration parameter of the second base station feedback is received by X2 interface, described first calibration parameter is that the second base station generates according to described first calibrating signal, described second calibrating signal is the second base station selected pre-coding matrix, and generate according to pre-coding matrix.
Wherein, described base station also comprises:
Second receives submodule, for being received the second base station selected pre-coding matrix by X2 interface.
Wherein, described calibration module comprises:
First calibration submodule, for according to described first calibration parameter and the second calibration parameter, obtains the first calibration factor of the first base station;
Second calibration submodule, for according to described first calibration factor, calibrates the signal of the community of described first base station.
The embodiment of the present invention also provides a kind of system, comprises the first base station and the second base station,
First base station sends calibration request by X2 interface to the second base station;
After second base station receives described calibration request, by X2 interface to the first base station feedback idling-resource;
The common free resource of the neighbor cell of the first base station and the second base station is determined according to the idling-resource of the second base station feedback and the idling-resource of oneself in first base station;
First base station generates the first calibrating signal, and in described common free resource, sends to the second base station by eating dishes without rice or wine;
The first calibration parameter that second base station generates according to described first calibrating signal, and generate the second calibrating signal, described first calibration parameter and the second calibrating signal are sent to the first base station;
First base station generates the second calibration parameter according to described second calibrating signal;
The signal calibration of the community of the first base station is carried out according to described first calibration parameter and described second calibration parameter in first base station.
Technique scheme of the present invention at least has following beneficial effect:
In the antenna calibration method of the embodiment of the present invention, utilize the common free resource (interface-free resources) between base station and X2 interface mutually to coordinate, thus mutually send calibrating signal, realize antenna calibration; Effectively prevent the interference between calibrating signal and service signal, solve between different site and with first practicing direct-connected problem, cannot not need by terminal feedback simultaneously, reducing the difficulty that system realizes; Realize the antenna calibration between base station by the three-dimensional calibration wave beam of transmission simultaneously, improve the precision of calibrating signal, ensure that the accuracy of final calibration factor.
Accompanying drawing explanation
Fig. 1 represents the schematic diagram directly sending signal between 3D-MIMO system adjacent base station;
Fig. 2 represents the basic procedure schematic diagram of the base station signal calibration steps that the embodiment of the present invention provides;
Fig. 3 represents the determination method flow diagram of the common free resource of the first base station and the second base station in the base station signal calibration steps that the embodiment of the present invention provides;
Fig. 4 represents the structural representation of the base station that the embodiment of the present invention provides;
Fig. 5 represents the schematic flow sheet of the mutual transmission calibrating signal between the adjacent base station of the system that the embodiment of the present invention provides.
Embodiment
For making the technical problem to be solved in the present invention, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
The present invention is directed to the problem that antenna calibration algorithm of the prior art effectively can not support the calibration of minizone, different site, a kind of base station signal calibration steps, base station and system are provided, the common free resource (interface-free resources) between base station and X2 interface is utilized mutually to coordinate, thus mutually send calibrating signal, realize antenna calibration; Effectively prevent the interference between calibrating signal and service signal, solve between different site and with first practicing direct-connected problem, cannot not need by terminal feedback simultaneously, reducing the difficulty that system realizes; Realize the antenna calibration between base station by the three-dimensional calibration wave beam of transmission simultaneously, improve the precision of calibrating signal, ensure that the accuracy of final calibration factor.
It should be noted that, as shown in Figure 1, in 3D-MIMO system, because three-dimensional beam shaping is supported in base station, when base station distance is nearer, directly may receive the signal that the other side sends each other.On the one hand, these signals can form serious interference, need to adopt inter-cell coordination mechanism to avoid interference; On the other hand, this character can utilize and directly mutually send signal (calibration wave beam) for calibration, as shown in Figure 1.
As shown in Figure 2, the embodiment of the present invention provides a kind of base station signal calibration steps, comprising:
Step 1, the first base station sends calibration request by X2 interface to the second base station;
In the above embodiment of the present invention, X2 interface realizes the interconnection between eNB (evolved base station), is the equal of the interface of base station and base station, provides the data-transformation facility between base station; Concrete, the present invention sends calibration request by X2 interface.
It should be noted that; in the above embodiment of the present invention; first base station and the second base station are two equivalent base stations, are not limited to the first base station and send calibration request to the second base station, and same second base station sends to the first base station the protection range that calibration request is also the application.
Step 2, the idling-resource that the first base station is fed back by X2 interface after receiving described calibration request according to the second base station, determines the common free resource of the neighbor cell of the first base station and the second base station;
In the specific embodiment of the invention, after the second base station receives described calibration request, select the idling-resource that the second base station is current, and feed back to the first base station by X2 interface; Wherein, the method selecting idling-resource is that those skilled in the art can realize, and does not describe in detail at this.
Step 3, the first base station generates the first calibrating signal, and in described common free resource, sends to the second base station by eating dishes without rice or wine;
In the specific embodiment of the invention, in step 2, the determination of common free resource is in order to avoid the interference between calibrating signal and normal user equipments signal; Then in step 3, the first calibrating signal of the first base station must send to the second base station by eating dishes without rice or wine in its common free resource.
Step 4, the first base station receives the second calibrating signal that the second base station generates according to the first calibration parameter of described first calibrating signal generation and the second base station;
In the specific embodiment of the invention, the second base station receives above-mentioned first calibrating signal, and calculates acquisition first calibration parameter; Suppose that the calibration reference signal that the first base station sends is X
1, pre-coding matrix is P
1, then the calibrating signal Y of the first base station transmission
1=P
1x
1; The calibrating signal that second base station receives is
wherein H
1,2the channel response of base station 1 to base station 2, β
1,2it is the channel response that the non-ideal factor equivalence of passage and the second base station receipts passage is sent out in the first base station; First calibration parameter computational methods are
Simultaneously the second base station also one of the main divisions of the male role in traditional opera become the second calibrating signal, common free resource sends to the first base station, and by X2 interface, the precoding information of described second calibrating signal and the first calibration parameter is sent to the first base station.
Step 5, the first base station generates the second calibration parameter according to described second calibrating signal;
In the specific embodiment of the invention, suppose that the calibration reference signal that the second base station sends is X
2, pre-coding matrix is P
2, then the calibrating signal Y of the second base station transmission
2=P
2x
2; The calibrating signal that first base station receives is
wherein H
2,1the channel response of base station 2 to base station 1, β
2,1it is the channel response that the non-ideal factor equivalence of passage and the first base station receipts passage is sent out in the second base station; Second calibration parameter computational methods are
Step 6, the signal calibration of the community of the first base station is carried out according to described first calibration parameter and described second calibration parameter in the first base station.
In the specific embodiment of the invention, the coefficient that the first base station is used for carrying out signal calibration is λ=λ
2λ
1.
In the above embodiment of the present invention, after in step 4, the second base station completes each community calibration of itself using the community sending calibrating signal as benchmark, the first base station completes the signal calibration of each community of the first base station jointly according to the first calibration parameter and the second calibration parameter.So far, multiple communities of the first base station all realize aerial signal calibration, and realize Complete Synchronization with multiple communities of the second base station.
In the above embodiment of the present invention, as shown in Figure 3, step 2 comprises:
Step 21, the first base station receives the information of the second community in described second base station range that feeds back according to described calibration request the second base station and the current idle resource of described second community;
In the specific embodiment of the invention, after the second base station receives calibration request, select the second community participating in calibration, wherein said second community is in the coverage of described second base station, and the community of described second community and described first base station is adjacent simultaneously.
Step 22, first community adjacent with described second community, according to the information of described second community, in the coverage of described first base station, is selected in the first base station;
In the specific embodiment of the invention, the first community participating in calibration is selected in the first base station, and this first community is in the coverage of described first base station, and this first community is adjacent with described second community simultaneously.
Step 23, the current idle resource of the first base station according to described first community and the current idle resource of the second community, determine the common free resource of the first community and the second community.
In the specific embodiment of the invention, the current idle resource of the first base station according to the first community and the current idle resource of the second community, selected common free resource, namely calibrates transfer resource; This common free resource is used between base station, transmit various calibrating signal.
Concrete, described first community and described second community are determined by the neighbor cell configuration list of described first base station and described second base station, or are determined by the mode that described first base station and described second base station detect synchronizing channel mutually.
Meanwhile, described common free resource is radio slots or the Resource Block of eating dishes without rice or wine.That is, the first base station sends calibrating signal at assigned timeslot to the second base station, the first base station and the second base station equal not dispatched users in this time slot; Or the first base station operation, in UE (subscriber equipment) pattern, accesses the second base station, by the first base station allocation of transmission resources respectively, mutually send calibrating signal, do not affect the scheduling of other subscriber equipmenies.
It should be noted that, other can determine that the method for the first community and the second community is all applicable in embodiments of the present invention, do not repeat one by one at this.
In the above embodiment of the present invention, step 3 comprises:
Step 31, first base station selected pre-coding matrix, and generate the first calibrating signal according to pre-coding matrix, by eating dishes without rice or wine in described common free resource, described first calibrating signal is sent to the second base station, and by X2 interface, described pre-coding matrix is sent to the second base station.
Concrete, step 4 comprises:
Step 41, the second calibrating signal that the first base station is generated in described common free resource by reception second base station of eating dishes without rice or wine, and the first calibration parameter being received feedback by X2 interface; Described first calibration parameter is that the second base station generates according to described first calibrating signal, and described second calibrating signal is the second base station selected pre-coding matrix, and generate according to pre-coding matrix.
Concrete, described antenna calibration method method also comprises:
Step 42, the first base station receives the second base station selected pre-coding matrix by X2 interface.
In the specific embodiment of the invention, when the first base station and the second base station send calibrating signal mutually, in order to avoid calibrating signal is to the interference of other signals, by carrying out precoding to calibrating signal; Concrete, the first base station generates the first calibrating signal by pre-coding matrix, and generation second calibrating signal is put to the proof by precoding in the second base station; In described common free resource, the other side base station is sent to again by eating dishes without rice or wine.
Meanwhile, because the first calibrating signal and the second calibrating signal are all through precoding, then base station needs after receiving calibrating signal to decode to calibrating signal, carry out subsequent operation after obtaining original signal; And convenient, fast in order to what decode, the pre-coding matrix selected separately is sent to the other side base station respectively by X2 interface by the first base station and the second base station, then the other side base station can fast decoding; Namely the first base station selected pre-coding matrix is sent to the second base station by X2 interface by the first base station, and the second base station selected pre-coding matrix is also sent to the first base station by X2 interface by the second base station.
Concrete, the defining method of described pre-coding matrix comprises:
Method one: described first base station and the described second mutual interception reference signal in base station, obtain forward-link channel information, and obtain the channel matrix of reverse link according to described forward-link channel information, calculate pre-coding matrix;
Method two: by X2 interface, forward-link channel information is fed back to the first base station or the second base station, calculate pre-coding matrix;
Method three: choose pre-coding matrix from the encoder matrix set preset.
It should be noted that, if the first base station or the second base station fail to receive calibrating signal, then notify that the other side base station reselects pre-coding matrix and sends calibrating signal, until travel through available pre-coding matrix set by X2 interface.
In the above embodiment of the present invention, step 6 comprises:
Step 61, the first base station, according to described first calibration parameter and the second calibration parameter, obtains the first calibration factor of the first base station;
Step 62, the first base station, according to described first calibration factor, is calibrated the signal of the community of described first base station.
In the specific embodiment of the invention, the second base station with the community sending the second calibrating signal for after benchmark completes the community calibration of itself; First base station, according to the first calibration parameter and the second calibration parameter, obtains the first calibration factor of the first base station.
In order to better realize above-mentioned purpose, as shown in Figure 4, the embodiment of the present invention also provides a kind of base station, comprising:
First sending module 10, for sending calibration request by X2 interface to the second base station;
Determination module 20, after receiving described calibration request according to the second base station, the idling-resource fed back by X2 interface, determines the common free resource of the neighbor cell of the first base station and the second base station;
Second sending module 30, for generating the first calibrating signal, and sends to the second base station by eating dishes without rice or wine in described common free resource;
Receiver module 40, for receiving the second calibrating signal that the second base station generates according to the first calibration parameter of described first calibrating signal generation and the second base station;
Generation module 50, for generating the second calibration parameter according to described second calibrating signal;
Calibration module 60, for carrying out the signal calibration of the community of the first base station according to described first calibration parameter and described second calibration parameter.
In the specific embodiment of the invention, described determination module 20 comprises:
First determines submodule, for receiving the information of the second community in described second base station range that feeds back according to described calibration request the second base station and the current idle resource of described second community;
Second determines submodule, for the information according to described second community, in the coverage of described first base station, selects first community adjacent with described second community;
3rd determines submodule, for according to the current idle resource of described first community and the current idle resource of the second community, determines the common free resource of the first community and the second community.
In the specific embodiment of the invention, described second sending module 30 comprises:
Second sends submodule, for selecting pre-coding matrix, and generate the first calibrating signal according to pre-coding matrix, by eating dishes without rice or wine in described common free resource, described first calibrating signal is sent to the second base station, and by X2 interface, described pre-coding matrix is sent to the second base station.
In the specific embodiment of the invention, described receiver module 40 comprises:
First receives submodule, for the second calibrating signal generated in described common free resource by reception second base station of eating dishes without rice or wine, and receive the first calibration parameter by X2 interface, described first calibration parameter is that the second base station generates according to described first calibrating signal, described second calibrating signal is the second base station selected pre-coding matrix, and generate according to pre-coding matrix.
In the specific embodiment of the invention, described base station also comprises:
Second receives submodule, for being received the second base station selected pre-coding matrix by X2 interface.
In the specific embodiment of the invention, described calibration module 60 comprises:
First calibration submodule, for according to described first calibration parameter and the second calibration parameter, obtains the first calibration factor of the first base station;
Second calibration submodule, for according to described first calibration factor, calibrates the signal of the community of described first base station.
In the antenna calibration method of the above embodiment of the present invention, utilize the common free resource (interface-free resources) between base station and X2 interface mutually to coordinate, thus mutually send calibrating signal, realize antenna calibration; Effectively prevent the interference between calibrating signal and service signal, solve problem cable cannot being used direct-connected between different site, do not need by terminal feedback simultaneously, reduce the difficulty that system realizes; Realize the antenna calibration between base station by the three-dimensional calibration wave beam of transmission simultaneously, improve the precision of calibrating signal, ensure that the accuracy of final calibration factor.
It should be noted that, the base station that can realize above-mentioned antenna calibration method of base station provided by the invention, then all embodiments of above-mentioned antenna calibration method are all applicable to this base station, and all can reach same or analogous beneficial effect.Simultaneously, in embodiments of the invention, this base station is divided into multiple module according to function, a hardware in actual applications in its base station of possibility just can realize the function of multiple module, module in the application is not limited to and hardware one_to_one corresponding, only specifically divides in order to clearer statement the application.
In order to better realize above-mentioned purpose, the embodiment of the present invention also provides a kind of system, comprises the first base station and the second base station, wherein,
First base station sends calibration request by X2 interface to the second base station;
After second base station receives described calibration request, by X2 interface to the first base station feedback idling-resource;
The common free resource of the neighbor cell of the first base station and the second base station is determined according to the idling-resource of the second base station feedback and the idling-resource of oneself in first base station;
First base station generates the first calibrating signal, and in described common free resource, sends to the second base station by eating dishes without rice or wine;
The first calibration parameter that second base station generates according to described first calibrating signal, and generate the second calibrating signal, described first calibration parameter and the second calibrating signal are sent to the first base station;
First base station generates the second calibration parameter according to described second calibrating signal;
The signal calibration of the community of the first base station is carried out according to described first calibration parameter and described second calibration parameter in first base station.
In the specific embodiment of the invention, as shown in Figure 5, between the first base station and the second base station by the direct transmission calibration beam signal idiographic flow of method for calibrating of eating dishes without rice or wine:
S1: base station 1 (the first base station) sends calibration request by X2 interface to base station 2 (the second base station);
S2: the community adjacent with base station 1 is selected in base station 2, and be denoted as Cell-2A, and select current available idling-resource for transmitting calibrating signal, wherein, Cell-2A is the community in the coverage of base station 2;
S3: the cell information Cell-2A and available resource information that participate in calibration are issued base station 2 by X2 interface by base station 2;
S4: base station 1 is selected and Cell-2A neighbor cell Cell-1A, and selectes common free resource according to self available resources situation, and wherein, Cell-1A is the community in the coverage of base station 1;
S5: pre-coding matrix is selected in base station 1, generates calibrating signal;
S6: base station 1 sends calibrating signal to base station 2 by eating dishes without rice or wine in common free resource, and by a precoding matrix feedback base station 2 that common free resource signal and base station 1 are selected by X2 interface;
S7:Cell-2A receives the calibrating signal that Cell-1A sends, and calculates calibration parameter 1;
S8:Cell-2A sends calibrating signal to Cell-1A on calibration transfer resource, and the pre-coding matrix of calibrating signal and calibration parameter 1 are fed back to base station 1 by X2 interface;
S9:Cell-1A receives calibrating signal and calculates calibration parameter 2;
S10: base station 1, according to calibration parameter 1 and calibration parameter 2, calculates the calibration factor of base station 1;
S11: base station 1 take Cell-1A as the calibration that benchmark completes each community in base station 1;
S12: base station 2 take Cell-2A as the calibration that benchmark completes each community in base station 2.
So far the multiple communities between base station 1 and base station 2 all realize antenna calibration.
It should be noted that, the system of the above embodiment of the present invention is the system comprising above-mentioned first base station and the second base station, then all embodiments of above-mentioned base station and beneficial effect thereof are all applicable to this system.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (16)
1. a base station signal calibration steps, is characterized in that, comprising:
First base station sends calibration request by X2 interface to the second base station;
The idling-resource that first base station is fed back by X2 interface after receiving described calibration request according to the second base station, determines the common free resource of the neighbor cell of the first base station and the second base station;
First base station generates the first calibrating signal, and in described common free resource, sends to the second base station by eating dishes without rice or wine;
First base station receives the second calibrating signal that the second base station generates according to the first calibration parameter of described first calibrating signal generation and the second base station;
First base station generates the second calibration parameter according to described second calibrating signal;
The signal calibration of the community of the first base station is carried out according to described first calibration parameter and described second calibration parameter in first base station.
2. base station signal calibration steps according to claim 1, it is characterized in that, the idling-resource that first base station is fed back by X2 interface after receiving described calibration request according to the second base station, determine that the step of the common free resource of the neighbor cell of the first base station and the second base station comprises:
First base station receives the information of the second community in described second base station range that feeds back according to described calibration request the second base station and the current idle resource of described second community;
First community adjacent with described second community, according to the information of described second community, in the coverage of described first base station, is selected in first base station;
The current idle resource of the first base station according to described first community and the current idle resource of the second community, determine the common free resource of the first community and the second community.
3. base station signal calibration steps according to claim 1, is characterized in that, the first base station generates the first calibrating signal, and in described common free resource, sends to the step of the second base station to comprise by eating dishes without rice or wine:
First base station selected pre-coding matrix, and generate the first calibrating signal according to pre-coding matrix;
Described first calibrating signal by eating dishes without rice or wine, is sent to the second base station, and by X2 interface, described pre-coding matrix is sent to the second base station in described common free resource by the first base station.
4. base station signal calibration steps according to claim 1, is characterized in that, the step that the first base station receives the second calibrating signal that the second base station generates according to the first calibration parameter of described first calibrating signal generation and the second base station comprises:
The second calibrating signal that first base station is generated in described common free resource by reception second base station of eating dishes without rice or wine, and the first calibration parameter of the second base station feedback is received by X2 interface, described first calibration parameter is that the second base station generates according to described first calibrating signal, described second calibrating signal is the second base station selected pre-coding matrix, and generate according to pre-coding matrix.
5. base station signal calibration steps according to claim 4, is characterized in that, also comprise:
First base station receives the second base station selected precoding matrix information by X2 interface.
6. base station signal calibration steps according to claim 1, is characterized in that, the step that the signal calibration of the community of the first base station is carried out according to described first calibration parameter and described second calibration parameter in the first base station comprises:
First base station, according to described first calibration parameter and the second calibration parameter, obtains the first calibration factor of the first base station;
First base station, according to described first calibration factor, is calibrated the signal of the community of described first base station.
7. base station signal calibration steps according to claim 2, it is characterized in that, described first community and described second community are determined by the neighbor cell configuration list of described first base station and described second base station, or are determined by the mode that described first base station and described second base station detect synchronizing channel mutually.
8. base station signal calibration steps according to claim 1, is characterized in that, described common free resource is wireless signal time slot or the Resource Block of eating dishes without rice or wine.
9. base station signal calibration steps according to claim 3, is characterized in that, the defining method of described pre-coding matrix comprises:
Described first base station and the described second mutual interception reference signal in base station, obtain forward-link channel information, and obtain the channel matrix of reverse link according to described forward-link channel information, calculate pre-coding matrix; Or,
By X2 interface, forward-link channel information is fed back to the first base station or the second base station, calculate pre-coding matrix; Or,
Pre-coding matrix is chosen from the encoder matrix set preset.
10. a base station, is characterized in that, comprising:
First sending module, for sending calibration request by X2 interface to the second base station;
Determination module, for the idling-resource fed back by X2 interface after receiving described calibration request according to the second base station, determines the common free resource of the neighbor cell of the first base station and the second base station;
Second sending module, for generating the first calibrating signal, and sends to the second base station by eating dishes without rice or wine in described common free resource;
Receiver module, for receiving the second calibrating signal that the second base station generates according to the first calibration parameter of described first calibrating signal generation and the second base station;
Generation module, for generating the second calibration parameter according to described second calibrating signal;
Calibration module, for carrying out the signal calibration of the community of the first base station according to described first calibration parameter and described second calibration parameter.
11. base stations according to claim 10, is characterized in that, described determination module comprises:
First determines submodule, for receiving the information of the second community in described second base station range that feeds back according to described calibration request the second base station and the current idle resource of described second community;
Second determines submodule, for the information according to described second community, in the coverage of described first base station, selects first community adjacent with described second community;
3rd determines submodule, for according to the current idle resource of described first community and the current idle resource of the second community, determines the common free resource of the first community and the second community.
12. base stations according to claim 10, is characterized in that, described second sending module comprises:
Second sends submodule, for selecting pre-coding matrix, and generate the first calibrating signal according to pre-coding matrix, by eating dishes without rice or wine in described common free resource, described first calibrating signal is sent to the second base station, and sends to the second base station by pre-coding matrix described in X2 interface.
13. base stations according to claim 10, is characterized in that, described receiver module comprises:
First receives submodule, for the second calibrating signal generated in described common free resource by reception second base station of eating dishes without rice or wine, and the first calibration parameter of the second base station feedback is received by X2 interface, described first calibration parameter is that the second base station generates according to described first calibrating signal, described second calibrating signal is the second base station selected pre-coding matrix, and generate according to pre-coding matrix.
14. base stations according to claim 13, is characterized in that, described base station also comprises:
Second receives submodule, for being received the second base station selected pre-coding matrix by X2 interface.
15. base stations according to claim 10, is characterized in that, described calibration module comprises:
First calibration submodule, for according to described first calibration parameter and the second calibration parameter, obtains the first calibration factor of the first base station;
Second calibration submodule, for according to described first calibration factor, calibrates the signal of the community of described first base station.
16. 1 kinds of systems, comprise the first base station and the second base station, it is characterized in that,
First base station sends calibration request by X2 interface to the second base station;
After second base station receives described calibration request, by X2 interface to the first base station feedback idling-resource;
The common free resource of the neighbor cell of the first base station and the second base station is determined according to the idling-resource of the second base station feedback and the idling-resource of oneself in first base station;
First base station generates the first calibrating signal, and in described common free resource, sends to the second base station by eating dishes without rice or wine;
The first calibration parameter that second base station generates according to described first calibrating signal, and generate the second calibrating signal, described first calibration parameter and the second calibrating signal are sent to the first base station;
First base station generates the second calibration parameter according to described second calibrating signal;
The signal calibration of the community of the first base station is carried out according to described first calibration parameter and described second calibration parameter in first base station.
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