CN103024754A - Multi-carrier-based method for interference coordination among micro base stations - Google Patents

Abstract

The invention provides a multi-carrier-based method between for interference coordination among micro base stations. The method comprises the steps of receiving carrier configuration status transmitted from adjacent micro base stations by one micro base station, and carrying out carrier configuration of a cell of the micro base station according to a principle that the carrier configuration of a cell is different from that of adjacent micro base stations by the micro base station according to the received carrier configuration status. The method can ensure different carrier configuration between the adjacent micro base stations so as to relieve mutual interference among the micro base stations and improve the performance of users on the border of the cell.

Description

A multi-carrier based interference coordination method between micro base stations

technical field

The present invention relates to interference coordination technology, in particular to a multi-carrier-based interference coordination method between micro base stations.

Background technique

Existing research shows that a heterogeneous network is introduced into a long-term evolution-advanced (LTE-advanced) system. A heterogeneous network refers to the deployment of micro cells under the macro cell. Such as remote radio unit (RRH), pico base station (Pico eNB), home base station (Home eNB) and relay base station (relay eNB). The introduction of microcells results in more cell border areas, which cause additional interference. The power imbalance between the macro cell and the micro cell causes particularly serious interference to UEs located in the cell boundary area. A typical deployment under a heterogeneous network is a macro cell (macro cell) + a femto cell (homeeNB), that is, a macro base station and a femto base station coexist. The home base station usually adopts CSG mode, and only users with CSG authority can access it. When a UE without CSG authority is within the CSG coverage, it can only communicate with the macro base station. When the macro base station and the home base station use the same frequency, it will cause serious interference to this part of the macro UE. We call this part of the UE For victim UE.

The 3gpp forum has discussed many solutions for mitigating victim UE interference, one of which is to implement interference coordination between macro eNB and home eNB based on multi-carrier. As shown in Figure 1, assuming that there are two carriers f1 and f2, the macro eNB can transmit control signaling and data information on any carrier for the macro UE far away from the home eNB; for the macro UE close to the home eNB (ie victim UE) And home UE, control information needs to be transmitted on different carriers, and data information can be transmitted on any carrier.

The multi-carrier mode of the home base station in the existing solution is determined by the OAM and notified to the home base station for configuration, that is, it is pre-set, and the OAM rarely reconfigures the multi-carrier mode used by the home base station, which easily leads to the following problems:

Because home base stations can be turned on at any time and anywhere, when home eNBs are densely distributed, there may be greater interference on the same carrier; it is necessary to coordinate the carrier configuration between each other, and the existing algorithm is not flexible enough.

For example, OAM configures multi-carriers for a home base station, but there are no femto UEs within the coverage of the home base station, or the number of femto UEs within the coverage of the home base station is very small, or the resource occupation is small, and these are not needed There are a large number of carriers, and at the same time, the access users of the adjacent home base stations cannot use the resources of these carriers, thus resulting in a waste of resources.

OAM configures fewer carrier resources for a home base station, but there are many femto UEs within the coverage of the home base station that need to communicate at the same time and have a large amount of data, while the number of access users of adjacent home base stations is small. Or the number of current uses is very small, and the amount of resources used is extremely small. At this time, the femto UE in this cell cannot use the resources of the adjacent home base station, thus resulting in a waste of resources.

To sum up, when the existing technology solves the problem of strong interference between CSG home base stations, some carriers are fixedly reserved for the home base stations, which will lead to insufficient resources or waste of resources in some cells, and cannot improve the utilization rate of multi-carrier resources. .

In addition, for some enterprises and other occasions where femtocells are used, because the femtocells can use the same CSG ID, there is an X2 interface between femtocells. There is also an X2 interface between Pico eNBs.

In view of the serious interference problem under the heterogeneous network, when the multi-carrier technology is used to alleviate the interference of the micro base station to the victim UE on the side of the macro base station, the carrier configuration of the macro base station and the home eNB to send the PDCCH to the victim UE should not conflict , so as to minimize the interference suffered by the victim UE on the control channel.

In addition, the 3GPP forum is also discussing the strong interference between micro base stations when they are intensively scheduled. As shown in Figure 2, when the home eNBs are densely distributed, it is expected that not only the carrier used by the victim UE should be different from that used by the home base station, but also that the home base stations should use different carriers as much as possible to reduce mutual interference. Similarly, similar problems exist when pico cells are densely distributed, and different carriers should be used as much as possible to reduce mutual interference.

Contents of the invention

The invention provides an interference coordination method based on multi-carriers, which can effectively alleviate the mutual interference between small base stations and improve the performance of cell edge users.

To achieve the above object, the present invention adopts the following technical solutions:

A multi-carrier-based interference coordination method, comprising:

The micro base station receives the carrier configuration status sent by the adjacent micro base station;

The micro base station configures the carrier of the cell according to the received carrier configuration status and according to the principle of being different from the carrier configuration of the adjacent micro base station.

Preferably, when the adjacent micro base station supports single carrier configuration, the transmitted carrier configuration status is: the single carrier currently used by the adjacent micro base station.

Preferably, the manner in which the adjacent micro base station sends the carrier configuration status is as follows:

Using a multi-carrier bitmap to carry the currently used single carrier; wherein, each bit of the multi-carrier bitmap represents a carrier, and a bit is set to indicate that the corresponding carrier is the currently used single carrier;

or,

Sending the cell identification number of the currently used single carrier to the micro base station.

Preferably, when the adjacent micro base station supports multi-carrier configuration, the transmitted carrier configuration status is: the configuration status of the basic coverage carrier and auxiliary capacity carrier currently used by the adjacent micro base station; wherein, the auxiliary A capacity carrier is a carrier that transmits no control information or transmits control information at reduced power.

Preferably, the manner in which the adjacent micro base station sends the carrier configuration status is:

The carrier configuration status is carried in the form of a multi-carrier bitmap; wherein, each bit of the multi-carrier bitmap represents a carrier, and a bit is set to indicate that the corresponding carrier is the basic coverage carrier, and a bit is not set bit indicates that the corresponding carrier is the auxiliary capacity carrier;

or,

Sending the cell identification number of the currently used basic coverage carrier to the micro base station.

Preferably, the transmitted carrier configuration status is: carrier resource information available to neighboring base stations of the neighboring micro base station.

Preferably, the manner in which the adjacent micro base station sends the carrier configuration status is:

A multi-carrier bitmap is used to carry carrier resource information available to neighboring base stations of the adjacent micro base station; wherein, each bit of the multi-carrier bitmap represents a carrier, and a bit is set to indicate that the corresponding carrier is all Carriers available to adjacent base stations of the adjacent micro base station;

Or, sending the identification number of the carrier in the cell available to the adjacent base station of the adjacent micro base station to the micro base station.

Preferably, when the micro base station receives the carrier configuration status sent by the neighboring micro base station, it further receives information that the multi-carrier interference coordination function is activated sent by the neighboring micro base station.

Preferably, the information about the carrier configuration status and the activation of the multi-carrier interference coordination function is received through the X2 interface between the micro base stations.

Preferably, after the micro base station configures the carrier of the cell, the method further includes:

When the micro base station supports single carrier configuration, the micro base station sends the proportion of PRBs occupied by UEs performing inter-cell interference coordination on the carrier configured by the micro base station to the neighboring micro base station as the Carrier adjustment basis when the number of resources is limited; wherein, the PRB ratio is the number of PRBs used by UEs performing inter-cell interference coordination on the self-configured carrier divided by the maximum available PRB on the carrier number;

When the micro base station supports multi-carrier configuration, the micro base station sends the proportion of CCEs occupied by UEs performing inter-cell interference coordination on the carrier configured by the micro base station to the neighboring micro base station, as the carrier of the neighboring micro base station Carrier adjustment basis when the number of resources is limited; the CCE ratio is the number of CCEs used by UEs performing inter-cell interference coordination on all current basic coverage carriers divided by the maximum available CCE on all current basic coverage carriers number.

Preferably, the UE performing inter-cell interference coordination is a UE that suffers from strong interference at the edge of a cell.

Preferably, after the micro base station configures the carrier of the local cell, the method further includes: the micro base station feeds back the information of the carrier configured in the local cell to the adjacent micro base station.

Preferably, when the micro base station supports single carrier configuration, the micro base station feeds back the carrier information configured in its own cell to the adjacent micro base station as follows:

Using a multi-carrier bitmap to carry the carrier information configured in the cell; wherein, each bit of the multi-carrier bitmap represents a carrier, and a bit is set to indicate that the corresponding carrier is a single carrier configured in the cell;

Or, sending the cell identification number of the single carrier configured in the current cell to the adjacent micro base station.

Preferably, when the micro base station supports single carrier configuration, the micro base station feeds back the carrier information configured in the local cell to the adjacent micro base station through a carrier information information element.

Preferably, when the micro base station supports multi-carrier configuration, the micro base station feeds back the carrier information configured in this cell to the adjacent micro base station as follows:

The carrier information configured by the cell is carried in the form of a multi-carrier bitmap; wherein, each bit of the multi-carrier bitmap represents a carrier, and a bit is set to indicate that the corresponding carrier is the basic coverage carrier configured by the cell , the bit is not set to indicate that the corresponding carrier is an auxiliary capacity carrier configured by the cell; wherein, the auxiliary capacity carrier is a carrier that does not transmit control information or transmits control information with reduced power;

Or, sending the cell identification number of the basic coverage carrier configured in the current cell to the adjacent micro base station.

Preferably, when the micro base station supports multi-carrier configuration, the micro base station feeds back the carrier information configured in the local cell to the adjacent micro base station through a basic coverage carrier information information element.

Preferably, the operation and maintenance system (OAM) configures consistent carrier mapping at the micro base station, and the mapped carriers are all carriers in the system or carriers in a predefined carrier subset; the number of carriers in the carrier subset is based on actual needs set up.

Preferably, the cell identification number of the carrier is the carrier frequency identification of the carrier.

It can be seen from the above technical solution that in the present invention, the micro base station receives the carrier configuration status sent by the adjacent micro base station; the micro base station performs the configuration of the cell according to the received carrier configuration status and the principle that the carrier configuration of the adjacent micro base station is different from that of the adjacent micro base station. carrier configuration. Through the carrier configuration of the above micro base stations, it is ensured that the carrier configurations between adjacent micro base stations are different, thereby reducing mutual interference between micro base stations and improving the performance of cell edge users.

Description of drawings

FIG. 1 is a schematic diagram 1 of existing interference coordination;

FIG. 2 is a second schematic diagram of existing interference coordination;

FIG. 3 is a schematic flow chart of a multi-carrier-based interference coordination method in the present invention.

Detailed ways

In order to make the purpose, technical means and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

The basic idea of the present invention is: when the interference coordination mechanism is started, the micro base station is required to transmit the configuration status of multiple carriers on the control interface with the adjacent micro base station, so as to assist the adjacent micro base station to avoid mutual interference when deciding its own carrier configuration. Interference between small base stations can be reduced, and interference coordination between micro base stations based on multi-carriers can be realized.

FIG. 3 is a schematic flow chart of a multi-carrier-based interference coordination method in the present invention. The method shown in FIG. 3 is described by taking the interference coordination of the micro base station A as an example. As shown in FIG. 3, the method includes:

Step 301, Femtocell A receives carrier configuration status sent by neighboring Femtocells.

In this step, the carrier configuration status received by the micro base station A is sent by the neighboring micro base station through the X2 interface.

Wherein, the carrier configuration status sent by the adjacent micro base station B can be defined in different forms according to needs, and the specific manner of sending the carrier configuration status can also adopt various forms, which will be described respectively below.

The definition of carrier configuration status can be as follows:

1. When the micro base station B supports single carrier configuration, the carrier configuration status is defined as: the single carrier currently used by the micro base station B; when the micro base station B supports multi-carrier configuration, the carrier configuration status is defined as: the micro base station B currently uses basic coverage carrier and auxiliary capacity carrier. Wherein, the basic coverage carrier is a carrier in a general sense, and the auxiliary capacity carrier is a carrier that does not transmit control information such as PDCCH or transmits control information such as PDCCH with reduced power. Under the definition of the carrier configuration status above, after receiving the carrier configuration status sent by the neighboring micro base station B, the micro base station A can directly determine the carrier status occupied by the micro base station B itself.

2. Regardless of whether the micro base station B supports single-carrier configuration or multi-carrier configuration (that is, supports carrier aggregation), the carrier configuration status is defined as: carrier resource information available to neighboring base stations of the micro base station B. Under the definition of the carrier configuration status, after the micro base station A receives the carrier configuration status sent by the neighboring micro base station B, it can directly determine its available carrier resources.

For the above two carrier configuration statuses, when sending the carrier configuration status, the existing messages of the X2 interface (for example, load information messages or eNB configuration update messages or X2 Setup Request/X2 Setup Response messages, etc.) or custom messages can be used. send. Specifically, when carrying the configuration status of the carrier, it may be carried in the manner of a multi-carrier bitmap or directly in the manner of carrying the cell identification number of the carrier. specifically,

For the definition of the first carrier configuration status, the specific method of carrying the carrier configuration status in the way of multi-carrier bitmap can be as follows:

When the micro base station B supports single-carrier configuration, each bit of the multi-carrier bitmap represents a carrier, and the bit is set (for example, the bit is set to 1) to indicate that the corresponding carrier is the single carrier currently used by the micro base station B. Being set (for example, the bit is 0) indicates that the corresponding carrier is a carrier not currently used by the micro base station;

When the micro base station B supports multi-carrier configuration, each bit of the multi-carrier bitmap represents a carrier, and the bit is set (for example, the bit is set to 1) to indicate that the corresponding carrier is the basic coverage carrier adopted by the micro base station B. Being set (for example, the bit is 0) indicates that the PDCCH transmission power of the corresponding carrier is reduced or is 0, that is, the corresponding carrier is an auxiliary capacity carrier adopted by the micro base station B.

For the definition of the first carrier configuration status, the specific method of directly carrying the cell identification number of the carrier may be as follows:

When the micro base station B supports single-carrier configuration, it directly sends the cell identification number of the single carrier currently used by the micro base station B (specifically, it can be the carrier frequency identification, that is, the EARFCN in the LTE system) to the micro base station A.

When the micro base station B supports multi-carrier configuration, it directly sends the cell identification number (specifically, the carrier frequency identification, EARFCN in the LTE system) of the basic coverage carrier currently used by the micro base station B to the micro base station A.

For the definition of the second carrier configuration status, the specific way to carry the carrier configuration status in the multi-carrier bitmap mode can be: each bit of the multi-carrier bitmap represents a carrier, and the bit is set (for example, the bit is set to 1 ) indicates that the PDCCH transmission power of the corresponding carrier does not decrease, that is, the corresponding carrier is the carrier resource available to the neighboring base stations of the micro base station B; the bit is not set (for example, the bit is 0) indicates that the PDCCH transmission power of the corresponding carrier is reduced or is 0, that is, the corresponding The carrier is a carrier resource unavailable to neighboring base stations of the micro base station B.

For the definition of the second carrier configuration status, the specific method of directly carrying the cell identification number of the carrier can be: the identification number of the carrier in the cell that is available to the adjacent base station of the micro base station B (specifically, it can be the carrier frequency identification, that is, the LTE EARFCN in the system) to the micro base station A

In the above method, the available carrier resource information and the unavailable carrier resource information of the adjacent micro base station are carried in the form of a multi-carrier bitmap, where the referred carrier can be all carriers in the system, or can be a certain A subset of carriers defined specifically for the purpose, such as a set of carriers used in a small area of some micro cells (such as home eNB in an enterprise network). What needs to be explained here is that in the specific implementation, the operation and maintenance system (OAM) needs to configure consistent carrier mapping on the macro eNB and Home eNB, so that both parties can know the carrier corresponding to each bit in the PCC/SCC configuration pattern information . The carrier mapping is specifically the bits in the PCC/SCC configuration pattern information corresponding to the cell identities of different carriers. During OAM configuration, the bit string corresponding to the PCC/SCC configuration pattern information can be from the 1st bit to the Nth bit in ascending or descending order according to the carrier frequency points in the existing bandwidth.

At the same time, when the micro base station B sends the carrier configuration status, it may further carry information for indicating that the multi-carrier interference coordination function is activated in the same message.

A specific example of sending the corresponding information is as follows: two IEs can be added to the interface message (such as the loadinformation message), namely the basic coverage carrier/secondary capacity carrier configuration pattern information (PCC/SCC configuration pattern info) and the basic coverage carrier/secondary capacity Carrier configuration information inactive (PCC/SCC configuration information Inactive) two IEs. Among them, the basic coverage carrier/auxiliary capacity carrier configuration mode information element carries the configuration information of the basic coverage carrier and the auxiliary capacity carrier; the basic coverage carrier/auxiliary capacity carrier configuration information element carries the activation information for indicating that the multi-carrier interference coordination function is activated Information.

Step 302, according to the carrier configuration status received in step 301, the micro base station A configures the carrier of the cell according to the principle of being different from the carrier configuration of the neighboring micro base stations.

In this step, according to the carrier configuration status sent by the adjacent micro base stations, the carrier configuration of the cell is performed, and when the carrier configuration is performed, it is ensured that it is different from the carrier configuration of the adjacent micro base stations, thereby reducing the mutual interference between the micro base stations, Improve performance for cell edge users.

The above is the basic flow of the interference coordination method in the present invention. Further, on the basis of the above process, preferably, the following step 303 and/or step 304 can be used to further feed back information to the adjacent micro base station, which can be used as a basis for further carrier configuration and adjustment of the adjacent micro base station, and further reduce micro Interference between base stations. The specific operation can be carried out as follows:

In step 303, the micro base station A sends the proportion of physical resources occupied by UEs requiring inter-cell interference coordination on the carrier configured by itself to the neighboring micro base station B.

In this step, the Femtocell notifies the adjacent Femtocell B of the resource occupancy status of the UE that requires inter-cell interference coordination on the carrier configured by itself, so as to provide a basis for further carrier adjustment of the neighboring Femtocell B.

Specifically, when the micro base station A supports single-carrier configuration, the micro base station A sends the PRB ratio occupied by the UE performing inter-cell interference coordination on the carrier configured by itself to the neighboring micro base station B;

When the micro base station A supports multi-carrier configuration, the micro base station A sends to the adjacent micro base station B the proportion of CCEs occupied by UEs performing inter-cell interference coordination on the configured carrier.

Based on the UE resource occupancy status sent above, the adjacent micro base station B can decide whether to use the carrier configured by the micro base station A when the number of carrier resources is limited, so as to realize the load sharing between the adjacent micro base station B and the micro base station A. Adaptive adjustment.

The specific ratio of PRB can use the IE in the existing protocol, and can also be redefined as the number of PRBs occupied by high-interference UEs/total number of PRBs;

The following explains its application scenarios as follows:

Case1: home eNB1 supports single carrier, and home eNB2 supports carrier aggregation:

Since home eNB1 supports a single carrier, the present invention feeds back the load status of the current carrier according to the PRB;

The specific processing is as follows: if the load of home eNB1 is high, home eNB2 may not consider any processing; if the load of home eNB1 is low, home eNB2 can borrow the entire single carrier of home eNB1; of course, even if the PRB is low, the load of the control channel may not be low, In any case, as long as the control channel load of home eNB2 is controlled within an appropriate range, the interference to home eNB1 is acceptable, because the reduction of control channel load is equivalent to the reduction of PDCCH power, or it can be understood as ensuring a certain The power of the number of CCEs is 0, and diversity is used to ensure the reception of the control channel of home eNB1; another solution is that home eNB2 only uses the single-carrier data channel of homeeNB1, in this case, there is no impact on the control channel.

Case2: When home eNB1 supports carrier aggregation and home eNB2 also supports carrier aggregation:

In this case, it is required to feedback the CCE occupancy ratio, which is defined as the number of CCEs occupied by high-interference UEs/the number of all available CCEs; here, the control channel usually occupies 3 OFDM symbols, so 3 OFDM symbols can The number of CCEs obtained serves as the benchmark for all CCEs. In this way, when a home eNB is overloaded, it can use a carrier of an adjacent home eNB; see the algorithm patent mentioned earlier for details;

For case1, if the CCE is fed back, there is no way to know the PRB status. If the CCE occupancy ratio is low, the data channel may not be idle, so it still cannot relieve the overload of the home eNB2. Therefore, it is recommended that different PRB or CCE occupancy ratios be fed back when single carrier and multi-carrier are different.

In step 304, the micro base station A feeds back the carrier information configured in this cell to the neighboring micro base station B.

Specifically, when the micro base station A feeds back the carrier information configured in the cell, it may adopt a multi-carrier bitmap manner, or may directly carry the cell identifier of the carrier. The specific implementation can be as follows:

When the multi-carrier bitmap is used to carry the carrier information configured in the cell, when the micro base station A supports single-carrier configuration, each bit of the multi-carrier bitmap represents a carrier, and the bit is set (for example, the bit is set to 1) Indicates that the corresponding carrier is a single carrier configured in the cell, and the bit is not set (for example, the bit is 0) to indicate that the corresponding carrier is a carrier not used in the cell; when the micro base station A supports multi-carrier configuration, the multi-carrier bit Each bit in the figure represents a carrier. When a bit is set (for example, the bit is set to 1), it means that the corresponding carrier is the basic coverage carrier configured by the cell. If the bit is not set (for example, the bit is 0), it means that the corresponding carrier is The auxiliary capacity carrier configured by the cell.

When the method of directly carrying the cell identification number of the carrier is adopted, when the micro base station A supports single carrier configuration, the cell identification number of the single carrier configured in this cell (specifically, it can be the carrier frequency identification, that is, the EARFCN in the LTE system) is sent to the corresponding The adjacent micro base station B can specifically feed back through the carrier information information element in the resource status response message; when the micro base station A supports multi-carrier configuration, the cell identification number of the basic coverage carrier configured in this cell (specifically, it can be the carrier frequency identification is EARFCN) in the LTE system is sent to the adjacent micro base station B, specifically, it can be fed back through the basic coverage carrier information information element in the resource status response message.

The above-mentioned carrier information feedback configured in the local cell can be used for the adjacent micro base station B to adjust the carrier configuration according to its channel condition and load condition.

So far, the entire method flow in the present invention ends. Wherein, steps 303 and 304 may be performed in any order. Through the above method, the carrier configuration can be transmitted between the micro base stations, and the micro base station can perform its own carrier configuration or load adjustment according to the received carrier configuration, so as to reduce the mutual interference between the micro base stations and improve the performance of the cell edge users.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (18)

1. A multi-carrier-based interference coordination method, characterized in that the method comprises: The micro base station receives the carrier configuration status sent by the adjacent micro base station; The micro base station configures the carrier of the cell according to the received carrier configuration status and according to the principle of being different from the carrier configuration of the adjacent micro base station. 2. The method according to claim 1, wherein when the adjacent micro base station supports single carrier configuration, the transmitted carrier configuration status is: the single carrier currently used by the adjacent micro base station. 3. The method according to claim 2, wherein the manner in which the adjacent micro base stations send the carrier configuration status is: Using a multi-carrier bitmap to carry the currently used single carrier; wherein, each bit of the multi-carrier bitmap represents a carrier, and a bit is set to indicate that the corresponding carrier is the currently used single carrier; or, Sending the cell identification number of the currently used single carrier to the micro base station. 4. The method according to claim 1, wherein when the adjacent micro base station supports multi-carrier configuration, the transmitted carrier configuration status is: the basic coverage carrier currently used by the adjacent micro base station and Auxiliary capacity carrier configuration status; wherein, the auxiliary capacity carrier is a carrier that does not transmit control information or transmits control information with reduced power. 5. The method according to claim 4, wherein the manner in which the adjacent micro base stations send the carrier configuration status is: The carrier configuration status is carried in the form of a multi-carrier bitmap; wherein, each bit of the multi-carrier bitmap represents a carrier, and a bit is set to indicate that the corresponding carrier is the basic coverage carrier, and a bit is not set bit indicates that the corresponding carrier is the auxiliary capacity carrier; or, Sending the cell identification number of the currently used basic coverage carrier to the micro base station. 6. The method according to claim 1, wherein the transmitted carrier configuration status is: carrier resource information available to neighboring base stations of the neighboring micro base station. 7. The method according to claim 6, wherein the manner in which the adjacent micro base station sends the carrier configuration status is: A multi-carrier bitmap is used to carry carrier resource information available to neighboring base stations of the adjacent micro base station; wherein, each bit of the multi-carrier bitmap represents a carrier, and a bit is set to indicate that the corresponding carrier is all Carriers available to adjacent base stations of the adjacent micro base station; Or, sending the identification number of the carrier in the cell available to the adjacent base station of the adjacent micro base station to the micro base station. 8. The method according to any one of claims 1 to 7, wherein when the micro base station receives the carrier configuration status sent by the neighboring micro base station, it further receives the multi-carrier information sent by the neighboring micro base station Information that the interference coordination function is activated. 9 . The method according to claim 8 , wherein the carrier configuration status and the information that the multi-carrier interference coordination function is activated are received through an X2 interface between micro base stations. 10. The method according to claim 1, characterized in that, after the micro base station configures the carrier of the cell, the method further comprises: When the micro base station supports single carrier configuration, the micro base station sends the proportion of PRBs occupied by UEs performing inter-cell interference coordination on the carrier configured by the micro base station to the neighboring micro base station as the Carrier adjustment basis when the number of resources is limited; wherein, the PRB ratio is the number of PRBs used by UEs performing inter-cell interference coordination on the self-configured carrier divided by the maximum available PRB on the carrier number; When the micro base station supports multi-carrier configuration, the micro base station sends the proportion of CCEs occupied by UEs performing inter-cell interference coordination on the carrier configured by the micro base station to the neighboring micro base station, as the carrier of the neighboring micro base station Carrier adjustment basis when the number of resources is limited; the CCE ratio is the number of CCEs used by UEs performing inter-cell interference coordination on all current basic coverage carriers divided by the maximum available CCE on all current basic coverage carriers number. 11 . The method according to claim 10 , wherein the UE performing inter-cell interference coordination is a UE subject to strong interference at a cell edge. 12. The method according to claim 1, characterized in that, after the micro base station configures the carrier of the local cell, the method further comprises: the micro base station feeds back the carrier information configured in the local cell to the adjacent micro base station. 13. The method according to claim 12, wherein when the micro base station supports single carrier configuration, the micro base station feeds back the carrier information configured in its own cell to the adjacent micro base station as follows: Using a multi-carrier bitmap to carry the carrier information configured in the cell; wherein, each bit of the multi-carrier bitmap represents a carrier, and a bit is set to indicate that the corresponding carrier is a single carrier configured in the cell; Or, sending the cell identification number of the single carrier configured in the current cell to the adjacent micro base station. 14. The method according to claim 12, wherein when the micro base station supports single carrier configuration, the micro base station feeds back the carrier information configured in its own cell to the adjacent micro base station through the carrier information information element . 15. The method according to claim 12, wherein when the micro base station supports multi-carrier configuration, the micro base station feeds back the carrier information configured in its own cell to the adjacent micro base station as follows: The carrier information configured by the cell is carried in the form of a multi-carrier bitmap; wherein, each bit of the multi-carrier bitmap represents a carrier, and a bit is set to indicate that the corresponding carrier is the basic coverage carrier configured by the cell , the bit is not set to indicate that the corresponding carrier is an auxiliary capacity carrier configured by the cell; wherein, the auxiliary capacity carrier is a carrier that does not transmit control information or transmits control information with reduced power; Or, sending the cell identification number of the basic coverage carrier configured in the current cell to the adjacent micro base station. 16. The method according to claim 12, wherein when the micro base station supports multi-carrier configuration, the micro base station feeds back the carrier information configured in the cell to the adjacent cell through the basic coverage carrier information information element micro base station. 17. The method according to claim 1, wherein the operation and maintenance system (OAM) configures consistent carrier mapping at the micro base station, and the mapped carriers are all carriers in the system or carriers in a predefined carrier subset; The number of carriers in the carrier subset is set according to actual needs. 18. The method according to claim 3, 5, 7, 13 or 15, wherein the cell identification number of the carrier is a carrier frequency identification of the carrier.

Images