CN102917461A - Carrier selecting method and device as well as base station - Google Patents

Abstract

The embodiment of the invention provides a carrier selecting method and device as well as a base station ; the method comprises the steps as follows: a first base station is used for obtaining carrier information of a cell under a second base station; and the first base station is used for selecting a carrier according to the obtained carrier information; through the adoption of the embodiment of the invention, when the base station in each form can support a plurality of carriers, the interference situations on all neighbor cells on the carrier can be understood, the interferences between the cells is furthest reduced, and the capacity of the system is enhanced. A problem that only interference information between the cells with the same frequency can be coordinated is avoided, and the interference coordinations of all cells under all carriers are achieved.

Description

Method, device and base station for selecting carrier

technical field

The invention relates to a wireless communication system, in particular to a method, device and base station for selecting a carrier.

Background technique

With the development of mobile broadband, the bandwidth requirements of end users are greatly increased, and the existing macro network-based networking mode will not be able to meet the bit rate required by mobile broadband services. In order to further improve the system capacity, more low-power access points or small base stations (hereinafter collectively referred to as small base stations) can be introduced within the scope of the macro network to improve the system capacity. The transmit power of the small base station is smaller than that of the macro base station, so the downlink coverage is much smaller than the downlink coverage of the macro base station. Taking the Long Term Evolution (LTE, LongTerm Evolution) system as an example, the home base station (Home eNodeB), micro base station (microeNodeB), pico base station (pico eNodeB), relay base station (Relay eNodeB), home base station (femtoeNodeB) under this system , remote radio head (RRH, remote radio head) and other access points (access points) can be called small base stations.

This hybrid networking method can enhance hotspot area coverage, indoor blind spot (or weak point) coverage, and cell edge coverage of macro base stations, improve cell average throughput, cell edge throughput, cell uplink/downlink spectrum utilization, and reduce network costs And the CAPEX (capital expenditure) of the operator, etc. This mixed network is called a heterogeneous network.

In communication systems, such as LTE systems, carrier aggregation is introduced as an important technology. The base station can provide multiple carriers at the same time, and the base station can use multiple carriers to provide services for a terminal that supports carrier aggregation, thereby increasing user data rates and enhancing user experience.

When base stations of various forms can support multiple carriers, how to select an appropriate carrier or carrier combination to minimize inter-cell interference and improve system capability is a problem that needs to be solved.

In the prior art, in the LTE system, the X2 interface supports inter-cell interference coordination of the same frequency. For example, base station 1 will transmit the uplink interference caused by adjacent cells of the same frequency, the uplink interference that base station 1 may cause to adjacent cells, and The downlink narrowband transmission power of the base station 1 is notified to neighboring base stations, so as to achieve interference coordination between base stations.

The above method only supports the exchange of information between cells of the same frequency, and cannot select a suitable cell to avoid inter-cell interference under different frequencies. For example, when a base station eNB3 has only one cell 6 on carrier 1, it cannot obtain the interference information of cells 1, 2, 3, 4, and 5 on carriers 2 and 3 of adjacent base stations eNB1 and eNB2, so that when the base station eNB3 needs When the carrier is added, the interference situation of adjacent cells on carriers 2 and 3 cannot be well understood, and inter-cell interference cannot be avoided.

And currently, when two base stations establish an X2 interface, each base station will send its cell information to neighboring base stations. The cell information includes information such as the uplink and downlink carrier frequency and bandwidth of the cell. Before the cell information, the X2 interface cannot be established. In the prior art, there is no method for interference coordination between adjacent cells using carrier information.

Contents of the invention

Embodiments of the present invention provide a method, device and base station for selecting a carrier, which can greatly reduce inter-cell interference and improve system capability.

An embodiment of the present invention provides a method for selecting a carrier, the method comprising:

The first base station obtains carrier information of a cell under the second base station;

The first base station selects a carrier according to the obtained carrier information.

The embodiment of the present invention also provides a device for selecting a carrier, the device comprising:

a carrier information obtaining unit, configured to obtain carrier information of a cell under the second base station;

a carrier selection unit, configured to select a carrier according to the carrier information obtained by the carrier information obtaining unit.

The embodiment of the present invention also provides a base station, and the base station includes:

a carrier information obtaining unit, configured to obtain carrier information of a cell under the second base station;

a carrier selection unit, configured to select a carrier according to the carrier information obtained by the carrier information obtaining unit.

Since a base station cannot obtain the carrier usage of neighboring cells before enabling the serving cell or determining cell information, it is not conducive for neighboring cells to perform interference coordination by avoiding using the same carrier or choosing to use fewer carriers. However, by using the carrier selection method, device and base station provided in the above embodiments, when base stations of various forms can support multiple carriers, it is possible to understand the interference situation of adjacent cells on multiple carriers, reduce inter-cell interference to the greatest extent, and improve system capability. Moreover, it avoids interference information that can only be coordinated between cells of the same frequency, and realizes interference coordination of multiple cells under multiple carriers.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a flowchart of a method for selecting a carrier according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of a logic structure of an apparatus for selecting a carrier according to an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Interfaces can be established between base stations. For example, in the LTE system, the interface between base stations is an X2 interface, so as to realize the interaction of signaling and data between base stations. The LTE system is used as an example to illustrate. Certainly, the present application is not limited to the LTE system, and is equally applicable to other systems.

During the establishment of the X2 interface, the two base stations will exchange application information such as their uplink and downlink carrier frequency and bandwidth, and there is a configuration update process between the base stations, which can further update each application information. A possible implementation manner is that in the serving cell information (Served Cell Information), the first base station notifies the adjacent second base station of its own application information. Taking Frequency Division Duplexing (FDD, Frequency Division Duplexing) system as an example, the above application information can be shown in Table 1:

Table 1

In the process of establishing the X2 interface, the first base station will send the information of each cell to the second base station. As shown in Table 2, the range (Range) of the serving cell (Served Cells) is from 1 to the number of the maximum cell (maxCellineNB ).

Table 2

This means that when the first base station establishes the X2 interface with the second base station, at least one cell serving the UE has been enabled or cell information of a cell has been determined. The cell information at least includes content such as uplink and downlink carrier frequency and bandwidth information.

In order to obtain information on all carriers used by adjacent base stations before the establishment of the X2 interface, an embodiment of the present invention provides a method for selecting a carrier, as shown in FIG. 1, which is applied to a base station supporting one or more carriers. Here, multiple A carrier base station refers to a base station that can support multiple carriers at the same time, and a base station that supports one carrier refers to a base station that can select a carrier among multiple different carriers, that is, the former is equivalent to a base station that can use multiple carriers at the same time, while the latter It is equivalent to that a base station can only use one carrier at a time, but the carrier selected each time can be the same or different. The method shown in Figure 1 may specifically include:

Step 101, the first base station obtains the carrier information of the cell under the second base station;

Specifically, the way for the first base station to obtain the carrier information of the cell under the second base station includes one of the following ways:

Mode a, before the first base station activates the serving cell or determines the cell information of the serving cell, the first base station and the second base station perform an X2 establishment process; in this way, the first base station obtains all The carrier information of the cell; that is, the first base station obtains the carrier information of the cell under the second base station through the inter-base station interface between the first base station and the second base station;

Mode b, before the first base station starts the serving cell or determines the cell information of the serving cell, the first base station obtains the carrier information of the cell under the second base station from the operation management and maintenance system (OAM, Operation Administration and Maintenance);

Mode c, before the first base station activates the serving cell or determines the cell information of the serving cell, the first base station receives the uplink carrier signal of the second base station, and determines the carrier information of the cell under the second base station according to the uplink carrier signal;

In mode d, after the first base station turns on the serving cell, the first base station and the second base station perform an inter-cell interference coordination (ICIC) operation; thus, through the inter-cell interference coordination process between the first base station and the second base station, the first base station obtains carrier information of a cell under the second base station or carrier information of a cell under the second base station adjacent to the cell under the first base station;

The above-mentioned ICIC operation usually refers to interactive load information (Load Information), so that according to the obtained adjacent cell uplink interference indication (OI, overload indication), high interference indication (HII, HighInterference Indication) information, downlink relative narrowband transmission power (RNTP, RelativeNarrowband Tx Power) information, space-like subframe (ABS, almost blank subframe) information, select uplink and/or downlink carriers with less interference;

It should be noted that, in this embodiment, when performing ICIC here, it is not limited by cells of the same frequency, that is, the second base station will send the relevant information of all its serving cells to the adjacent first base station, so as to avoid only Limited to co-channel interference coordination. Alternatively, the second base station sends information about itself and all neighboring cells of the first base station to the first base station. At this time, the identification methods of all neighboring cells can be obtained through OAM configuration, or obtained according to UE measurement reports.

Mode e, after the first base station starts serving the cell, through the inter-base station interface establishment process such as the X2 interface establishment process, or the base station configuration update process, obtain the carrier information of the cell under the second base station or the carrier information of the cell under the first base station. Carrier information of cells under the adjacent second base station.

It should be noted that the carrier information includes at least one of carrier frequency and bandwidth information, carrier interference information, and carrier transmit power information. That is to say, the above carrier information may include one or any combination of the above three types.

Wherein, the transmit power information is obtained during the process of establishing an inter-base station interface between the first base station and the second base station. The carrier interference information includes the carrier interference information of the cell under the second base station or the carrier interference information of the cell under the second base station adjacent to the cell under the first base station, and the interference information of the carrier is between the first base station and the second base station. After the two base stations establish the interface between the base stations, the interface is obtained by the first base station during the inter-cell interference coordination operation process.

Step 102, the first base station selects a carrier according to the obtained carrier information.

Here, the operation of selecting a carrier includes determining a carrier and/or updating a carrier, wherein updating a carrier includes at least one of operations of adjusting, adding, and deleting, that is, adjusting, adding, and/or deleting a carrier.

Since the carrier information obtained by the first base station contains different specific content, the manners of selecting the carrier are also different, which will be described separately below.

Mode 1: If the carrier information specifically includes carrier frequency and bandwidth information, and the carrier frequency and bandwidth information specifically includes uplink carrier frequency and bandwidth information and/or downlink carrier frequency and bandwidth information; at this time, the first base station according to the The obtained carrier information, the step of selecting the carrier includes:

The first base station determines, according to the carrier frequency and bandwidth information of the uplink carrier, an uplink carrier whose current use frequency is lower than the usage threshold or is not used as the currently used uplink carrier; and/or

The first base station determines, according to the carrier frequency and bandwidth information of the downlink carrier, a downlink carrier that is currently used less than the usage threshold or is not used as the currently used downlink carrier.

It should be noted that if the carrier frequency and bandwidth information only includes uplink carrier frequency and bandwidth information, then only the currently used uplink carrier can be determined; if the carrier frequency and bandwidth information only includes downlink carrier frequency and bandwidth information, then only the current Downlink carrier used; if the carrier frequency and bandwidth information includes uplink and downlink carrier frequency and bandwidth information, only the currently used uplink carrier, or only the downlink carrier, or both uplink and downlink carriers can be determined.

For example, there are two uplink carriers and two downlink carriers, uplink carrier 1 is used by 3 cells, and uplink carrier 2 is used by 1 cell, then in this area, uplink carrier 2 will be determined as the currently used uplink carrier. If downlink carrier 1 is used by three cells and downlink carrier 2 is not used, then in this area, downlink carrier 2 will be determined as the currently used downlink carrier.

Mode 2: If the carrier information includes carrier transmit power information, the method described in FIG. 1 further includes: the signal strength information of the cell under the second base station received by the first base station;

At this time, the step of selecting a carrier by the first base station according to the obtained carrier information includes:

According to the transmission power information of the carrier and the received signal strength information of the cell under the second base station, obtain the path loss information of the cell of the second base station, and determine the maximum or high path loss according to the obtained path loss information The downlink carrier that is equal to or greater than the path loss threshold is used as the currently used downlink carrier.

For example, based on the transmit power information and the signal emphasis information of cells 1, 2, and 3 of the second base station, the first base station calculates that the path loss information of cell 1 under the second base station is 1, and the path loss information of cell 2 is 0.8. The path loss information of 3 is 0.3, then, according to the preset strategy, if it is determined that the downlink carrier with the largest path loss is used as the currently used downlink carrier, cell 1 is selected; For the downlink carrier, select cell 1 or cell 2.

Mode 3: If the carrier information includes carrier interference information, and the carrier interference information specifically includes uplink carrier interference information and/or downlink carrier interference information; at this time, the first base station selects The carrier steps include:

The first base station determines an uplink carrier whose interference is lower than or equal to an interference threshold or has no interference as the currently used downlink carrier according to the interference information of the uplink carrier; and/or

According to the interference information of the downlink carrier, the first base station determines the downlink carrier whose interference is lower than or equal to the interference threshold or has no interference as the currently used downlink carrier.

Method 4: The difference from method 3 is that the carrier interference information also includes downlink interference indication information, and the downlink carrier whose interference is lower than or equal to the interference threshold or has no interference can be determined according to the interference information of the downlink carrier and the downlink interference indication information as the currently used downlink carrier.

Specifically, when the carrier information includes carrier interference information, the carrier interference information specifically includes uplink carrier interference information and downlink interference indication information, and/or downlink carrier interference information and downlink interference indication information;

The step of selecting a carrier by the first base station according to the obtained carrier information includes:

The first base station determines an uplink carrier whose interference is lower than or equal to an interference threshold or has no interference as the currently used downlink carrier according to the interference information of the uplink carrier; and/or

The first base station determines a downlink carrier whose interference is lower than or equal to an interference threshold or has no interference as the currently used downlink carrier according to the interference information of the downlink carrier and the downlink interference indication information.

For methods 3 and 4, it should be noted that if the interference information of the carrier only includes the interference information of the uplink carrier, then only the currently used uplink carrier can be determined; if the interference information of the carrier only includes the interference information of the downlink carrier, then only the Determine the currently used downlink carrier; if the interference information of the carrier includes the interference information of the uplink and downlink carriers, then only the currently used uplink carrier, or only the downlink carrier, or both uplink and downlink carriers may be determined.

It should be noted that no matter which of the above methods 1 to 4 is adopted,

If the first base station has determined the uplink carrier, the first base station can select the downlink carrier according to the selected uplink carrier and the uplink and downlink carrier pairing table;

If the first base station has determined the downlink carrier, the first base station can select the uplink carrier according to the selected downlink carrier and the uplink and downlink carrier pairing table;

If the first base station has determined the uplink carrier, the first base station can select the downlink carrier according to the selected uplink carrier and the uplink and downlink carrier pairing information of the cell under the second base station;

If the first base station has determined the downlink carrier, the first base station may select the uplink carrier according to the selected downlink carrier and the uplink and downlink carrier pairing information of the cell under the second base station.

So far, it is realized that the first base station realizes carrier selection.

It should be noted that, in the above step 102, a pair of uplink and downlink carriers can be selected at one time, or multiple uplink carriers and multiple downlink carriers can be selected at one time, and the number of selected uplink carriers and the number of downlink carriers can be the same or can be different.

It should be noted that when mode a is adopted in step 101, since the first base station and the second base station are allowed to perform the X2 establishment process before the first base station starts a cell serving the terminal or determines the cell information of a cell, this The protocol modification specifically involved is shown in Table 3:

table 3

It should be noted that, in the fourth method above, the above-mentioned downlink interference indication information is an indication of the interference intensity of all adjacent base station cells on the first frequency received by the first base station (or UE under the first base station), specifically, " High, medium, low", or "high, low", or "decibel value" and other ways to indicate.

For the above downlink interference indication information, specific protocol modifications involved are shown in Table 4:

Table 4

The carrier selection in the above step 102 includes determining the carrier and updating the carrier, and the operation of updating the carrier includes at least one of adjustment, addition and deletion operations. The above methods 1 to 4 are the process of determining the carrier or updating the carrier. For the need to update the carrier, it may also include: the first base station also needs to obtain the signal quality information of the second base station and/or the measurement report reported by the user equipment. Specifically, it can be divided into For the following three situations:

Case A, the method shown in FIG. 1 further includes: the first base station receiving the signal quality information of the second base station; at this time, the first base station selecting the carrier includes: the first base station according to the obtained carrier information and the second base station signal quality information update carrier;

Case B, the method shown in FIG. 1 further includes: the first base station receiving the measurement report reported by the user equipment; at this time, the first base station selecting a carrier includes: the first base station according to the obtained carrier information and the measurement report reported by the user equipment update carrier;

Case C, the method described in FIG. 1 further includes: the first base station receiving the signal quality information of the second base station and the measurement report reported by the user equipment; at this time, the first base station selecting a carrier includes: the first base station according to the obtained carrier information And the signal quality information of the second base station and the measurement report reported by the user equipment update the carrier.

It should be noted that, in the aforementioned step 101, the manner of obtaining the interference information of the carrier may include:

The first base station receives the carrier interference information of all cells or all adjacent cells actively sent by the second base station, that is, the first base station receives the information actively pushed by the second base station; that is, the first base station receives the information sent by the second base station The interference information of the carrier of the cell under the second base station or the interference information of the carrier of the cell under the second base station adjacent to the cell under the first base station; or,

The first base station sends call indication information (Invoke indication) to the second base station, where the call indication information is used to instruct the second base station to use the interference information of the carrier of the cell of the second base station or to communicate with the first base station The interference information of the carrier of the cell under the second base station adjacent to the cell is sent to the first base station. The second base station sends the carrier interference information of all its own cells or all adjacent cells to the first base station according to the received call indication information, specifically, the load information (LoadInformation) may be used to send to the first base station. Here, it is equivalent to extending the Invoke indication, that is, when the second base station receives the Invoke indication, it returns the carrier interference information of all cells; at this time, the returned Load Information message can also carry ABS at the same time Information (ABS Information).

Using the latter method, only when the first base station needs the interference information of the carrier, it initiates a request to the second base station, which avoids the timing push of the second base station and saves the processing resources of the second base station; and also avoids the first The base station regularly processes the information sent by the second base station, and also saves resources and network load of the first base station, making the processing efficiency higher.

Applying the methods provided in the above embodiments, when base stations of various forms can support multiple carriers, it is possible to know the interference situation of each carrier in adjacent cells, minimize inter-cell interference, and improve system capabilities. Moreover, it avoids interference information that can only be coordinated between cells of the same frequency, and realizes interference coordination on all carriers of adjacent base station cells.

The embodiment of the present invention also provides a device for selecting a carrier. Referring to FIG. 2, the device includes:

A carrier information obtaining unit 201, configured to obtain carrier information of a cell under the second base station;

The carrier selection unit 202 is configured to select a carrier according to the carrier information obtained by the carrier information obtaining unit.

Wherein, the device is located at the first base station, and the carrier information obtaining unit is specifically configured to:

Before the first base station activates the serving cell or determines the cell information of the serving cell, obtain the carrier information of the cell under the second base station through the inter-base station interface between the first base station and the second base station;

or,

Before the first base station activates the serving cell or determines the cell information of the serving cell, the first base station obtains the carrier information of the cell under the second base station from the operation management and maintenance system; or,

Before the first base station activates the serving cell or determines the cell information of the serving cell, the first base station receives the uplink carrier signal of the second base station, and determines the carrier information of the cell under the second base station according to the uplink carrier signal; or,

After the first base station turns on the serving cell, through the inter-cell interference coordination process between the first base station and the second base station, the carrier information of the cell under the second base station or the information of the second base station adjacent to the cell under the first base station is obtained. carrier information of the cell; or,

After the first base station activates the serving cell, the carrier information of the cell under the second base station or all adjacent cells between the first base station and the second base station is obtained through the inter-base station interface establishment process or the base station configuration update process.

Wherein, the carrier information includes one of carrier frequency and bandwidth information, carrier interference information, and carrier transmit power information.

Wherein, the carrier selection unit is specifically configured to determine a carrier and/or update a carrier, and the updating of a carrier includes at least one of operations of adjustment, addition and deletion.

Among them, when the carrier needs to be updated,

The device also includes:

The first receiving subunit is configured to receive signal quality information of the second base station;

The carrier selection unit includes: a first updating subunit, configured to update the carrier according to the carrier information obtained by the carrier information obtaining unit and the second base station signal quality information received by the first receiving subunit;

or,

The device also includes:

The second receiving subunit is configured to receive the measurement report reported by the user equipment;

The carrier selecting unit includes: a second updating subunit, configured to update a carrier according to the carrier information obtained by the carrier information obtaining unit and according to the measurement report reported by the user equipment received by the second receiving subunit;

or,

The device also includes:

The third receiving subunit is configured to receive the signal quality information of the second base station and the measurement report reported by the user equipment;

The carrier selection unit includes: a third update subunit, configured to use the carrier information obtained by the carrier information obtaining unit and the signal quality information of the second base station received by the third receiving subunit and the information reported by the user equipment. Measurement report update carrier.

By applying the device provided by the above embodiments, when base stations of various forms can support multiple carriers, it is possible to know the interference situation of adjacent cells on all carriers, minimize inter-cell interference, and improve system capability. Moreover, it avoids interference information that can only be coordinated between cells of the same frequency, and realizes interference coordination of all cells under all carriers.

The embodiment of the present invention also provides a base station, which is used for the first base station to select a carrier, and the base station includes:

a carrier information obtaining unit, configured to obtain carrier information of a cell under the second base station;

a carrier selection unit, configured to select a carrier according to the carrier information obtained by the carrier information obtaining unit.

Wherein, the carrier information obtaining unit is specifically used for,

Before the first base station activates the serving cell or determines the cell information of the serving cell, obtain the carrier information of the cell under the second base station through the inter-base station interface between the first base station and the second base station;

or,

Before the first base station activates the serving cell or determines the cell information of the serving cell, the first base station obtains the carrier information of the cell under the second base station from the operation management and maintenance system; or,

Before the first base station activates the serving cell or determines the cell information of the serving cell, the first base station receives the uplink carrier signal of the second base station, and determines the carrier information of the cell under the second base station according to the uplink carrier signal; or,

After the first base station turns on the serving cell, through the inter-cell interference coordination process between the first base station and the second base station, the carrier information of the cell under the second base station or the information of the second base station adjacent to the cell under the first base station is obtained. carrier information of the cell; or,

After the first base station activates the serving cell, the carrier information of the cell under the second base station or all adjacent cells between the first base station and the second base station is obtained through the inter-base station interface establishment process or the base station configuration update process.

Applying the base station provided by the above embodiment, when the base station of each form can support multiple carriers, it can know the interference situation of adjacent cells on all carriers, reduce inter-cell interference to the greatest extent, and improve system capability. Moreover, it avoids interference information that can only be coordinated between cells of the same frequency, and realizes interference coordination of all cells under all carriers.

For the device and base station embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and for relevant parts, refer to the part of the description of the method embodiments.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. any such actual relationship or order exists between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Those of ordinary skill in the art can understand that all or part of the steps in the implementation of the above method can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, referred to herein as Storage media, such as: ROM/RAM, disk, CD, etc.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims (19)

1. A method for selecting a carrier, characterized in that the method comprises: The first base station obtains carrier information of a cell under the second base station; The first base station selects a carrier according to the obtained carrier information. 2. The method according to claim 1, wherein the manner in which the first base station obtains the carrier information of the cell under the second base station comprises: Before the first base station activates the serving cell or determines the cell information of the serving cell, the first base station obtains the carrier information of the cell under the second base station through the inter-base station interface between the first base station and the second base station; or, Before the first base station activates the serving cell or determines the cell information of the serving cell, the first base station obtains the carrier information of the cell under the second base station from the operation management and maintenance system; or, Before the first base station activates the serving cell or determines the cell information of the serving cell, the first base station receives the uplink carrier signal of the second base station, and determines the carrier of the cell under the second base station according to the uplink carrier signal information; or, After the first base station turns on the serving cell, through the inter-cell interference coordination process between the first base station and the second base station, the carrier information of the cell under the second base station or the second base station adjacent to the cell under the first base station is obtained. The carrier information of the cell under the second base station; or, After the first base station starts the serving cell, through the inter-base station interface establishment process or the base station configuration update process, obtain the carrier information of the cell under the second base station or the information of the second base station adjacent to the cell under the first base station The carrier information of the cell. 3. The method according to claim 1 or 2, wherein the carrier information includes at least one of carrier frequency and bandwidth information, carrier interference information, and carrier transmit power information. 4. The method according to claim 3, wherein when the carrier information includes carrier frequency and bandwidth information, the carrier frequency and bandwidth information specifically includes the frequency and bandwidth information of the uplink carrier, and/or the downlink carrier Carrier frequency and bandwidth information; The first base station selects a carrier according to the obtained carrier information, including: The first base station determines, according to the carrier frequency and bandwidth information of the uplink carrier, an uplink carrier that is currently used less than a usage threshold or an unused uplink carrier as the currently used uplink carrier; and/or The first base station determines, according to the carrier frequency and bandwidth information of the downlink carrier, a downlink carrier whose current use times is lower than a usage threshold or an unused downlink carrier as the currently used downlink carrier. 5. The method according to claim 3, wherein when the carrier information includes carrier transmit power information, the method further comprises: The first base station receives signal strength information of cells under the second base station; The first base station selects a carrier according to the obtained carrier information, including: According to the transmission power information of the carrier and the received signal strength information of the cell under the second base station, obtain the path loss information of the cell of the second base station, and determine the maximum or high path loss according to the obtained path loss information The downlink carrier that is equal to or greater than the path loss threshold is used as the currently used downlink carrier. 6. The method according to claim 1, wherein when the carrier information includes carrier interference information, the carrier interference information specifically includes uplink carrier interference information and/or downlink carrier interference information; The first base station selects a carrier according to the obtained carrier information, including: The first base station determines an uplink carrier whose interference is lower than or equal to an interference threshold or has no interference as the currently used uplink carrier according to the interference information of the uplink carrier; and/or According to the interference information of the downlink carrier, the first base station determines the downlink carrier whose interference is lower than or equal to the interference threshold or has no interference as the currently used downlink carrier. 7. The method according to claim 6, wherein when the carrier information includes carrier interference information, the carrier interference information includes uplink carrier interference information and downlink interference indication information, and/or, the The carrier interference information includes downlink carrier interference information and downlink interference indication information; The first base station selects a carrier according to the obtained carrier information, including: The first base station determines an uplink carrier whose interference is lower than or equal to an interference threshold or has no interference as the currently used downlink carrier according to the interference information of the uplink carrier; and/or The first base station determines a downlink carrier whose interference is lower than or equal to an interference threshold or has no interference as the currently used downlink carrier according to the interference information of the downlink carrier and the downlink interference indication information. 8. The method according to claim 3, wherein the transmit power information is obtained during the process of establishing an interface between base stations between the first base station and the second base station. 9. The method according to claim 3, wherein the interference information of the carrier includes the interference information of the carrier of the cell under the second base station or the second base station adjacent to the cell under the first base station The interference information of the carrier of the cell under the network, and the interference information of the carrier is obtained by the first base station during the inter-cell interference coordination operation process after the first base station and the second base station establish an inter-base station interface . 10. The method according to any one of claims 4-9, wherein the first base station obtains carrier information of a cell under the second base station, comprising: The first base station receives the interference information of the carrier of the cell under the second base station sent by the second base station or the interference information of the carrier of the cell under the second base station adjacent to the cell under the first base station; or, The first base station sends call indication information to the second base station, where the call indication information is used to instruct the second base station to use the interference information of the carrier of the cell of the second base station or to be adjacent to the cell under the first base station The interference information of the carrier of the cell under the second base station is sent to the first base station. 11. The method of claim 1, wherein, The selected carrier includes: Determining a carrier and/or updating a carrier, where the updating of a carrier includes: at least one of adjusting, adding, and deleting a carrier. 12. The method of claim 11, wherein, The method also includes: The first base station receives signal quality information of the second base station; The selecting the carrier includes: when the first base station updates the carrier, the first base station updates the carrier according to the obtained carrier information and the second base station signal quality information; or, The method further includes: the first base station receiving the measurement report reported by the user equipment; The selecting the carrier includes: when the first base station updates the carrier, the first base station updates the carrier according to the obtained carrier information and the measurement report reported by the user equipment; or, The method further includes: the first base station receiving the signal quality information of the second base station and the measurement report reported by the user equipment; The selection of the carrier by the first base station includes: when the first base station updates the carrier, the first base station updates the carrier according to the obtained carrier information, signal quality information of the second base station, and a measurement report reported by the user equipment. 13. A device for selecting a carrier, characterized in that the device comprises: a carrier information obtaining unit, configured to obtain carrier information of a cell under the second base station; a carrier selection unit, configured to select a carrier according to the carrier information obtained by the carrier information obtaining unit. 14. The device according to claim 13, wherein the device is located at the first base station, The carrier information obtaining unit is specifically configured to obtain the carrier information of the cell under the second base station through the inter-base station interface between the first base station and the second base station before the first base station activates the serving cell or determines the cell information of the serving cell ; or, Before the first base station activates the serving cell or determines the cell information of the serving cell, the first base station obtains the carrier information of the cell under the second base station from the operation management and maintenance system; or, Before the first base station activates the serving cell or determines the cell information of the serving cell, the first base station receives the uplink carrier signal of the second base station, and determines the carrier information of the cell under the second base station according to the uplink carrier signal; or, After the first base station turns on the serving cell, through the inter-cell interference coordination process between the first base station and the second base station, the carrier information of the cell under the second base station or the information of the second base station adjacent to the cell under the first base station is obtained. carrier information of the cell; or, After the first base station activates the serving cell, the carrier information of the cell under the second base station or all adjacent cells between the first base station and the second base station is obtained through the inter-base station interface establishment process or the base station configuration update process. 15. The device according to claim 13, wherein the carrier information includes one of carrier frequency and bandwidth information, carrier interference information, and carrier transmit power information. 16. The device according to claim 13, wherein the carrier selecting unit is specifically configured to determine a carrier and/or update a carrier, and the updating a carrier includes at least one of operations of adjustment, addition and deletion. 17. The method according to claim 16, wherein when the carrier needs to be updated, The device also includes: The first receiving subunit is configured to receive signal quality information of the second base station; The carrier selection unit includes: a first updating subunit, configured to update the carrier according to the carrier information obtained by the carrier information obtaining unit and the second base station signal quality information received by the first receiving subunit; or, The device also includes: The second receiving subunit is configured to receive the measurement report reported by the user equipment; The carrier selecting unit includes: a second updating subunit, configured to update a carrier according to the carrier information obtained by the carrier information obtaining unit and according to the measurement report reported by the user equipment received by the second receiving subunit; or, The device also includes: The third receiving subunit is configured to receive the signal quality information of the second base station and the measurement report reported by the user equipment; The carrier selection unit includes: a third update subunit, configured to use the carrier information obtained by the carrier information obtaining unit and the signal quality information of the second base station received by the third receiving subunit and the information reported by the user equipment. Measurement report update carrier. 18. A base station, characterized in that the base station comprises: a carrier information obtaining unit, configured to obtain carrier information of a cell under the second base station; a carrier selection unit, configured to select a carrier according to the carrier information obtained by the carrier information obtaining unit. 19. The base station according to claim 18, characterized in that, The carrier information obtaining unit is specifically used for: Before the first base station activates the serving cell or determines the cell information of the serving cell, obtain the carrier information of the cell under the second base station through the inter-base station interface between the first base station and the second base station; or, Before the first base station activates the serving cell or determines the cell information of the serving cell, the first base station obtains the carrier information of the cell under the second base station from the operation management and maintenance system; or, Before the first base station activates the serving cell or determines the cell information of the serving cell, the first base station receives the uplink carrier signal of the second base station, and determines the carrier information of the cell under the second base station according to the uplink carrier signal; or, After the first base station turns on the serving cell, through the inter-cell interference coordination process between the first base station and the second base station, the carrier information of the cell under the second base station or the information of the second base station adjacent to the cell under the first base station is obtained. carrier information of the cell; or, After the first base station activates the serving cell, the carrier information of the cell under the second base station or all adjacent cells between the first base station and the second base station is obtained through the inter-base station interface establishment process or the base station configuration update process.

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