Patent Publication Number: US-2021168642-A1

Title: Interference Processing Method, Apparatus, And System

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a continuation application of PCT International Application No. PCT/CN2019/099495 filed on Aug. 6, 2019, which claims priority to Chinese Patent Application No. 201810910862.6, filed with the China National Intellectual Property Administration on Aug. 10, 2018 and entitled “INTERFERENCE PROCESSING METHOD, APPARATUS, AND SYSTEM”, both disclosures of which are incorporated herein by reference in their entireties. 
    
    
     TECHNICAL FIELD 
     Embodiments of the present invention relate to the field of communications technologies, and in particular, to an interference processing method, an apparatus, and a system. 
     RELATED ART 
     In a communications system, a base station may interact with another device (for example, user equipment, another base station, or a core network device). 
     Currently, during the interaction between the base station and the another device, if the base station sends a signal to the another device, the another device near the base station may receive the signal sent by the base station. However, if another base station is transmitting data at this time, due to factors such as a weather condition, high transmit power of the base station, and a high antenna position, the another base station may be interfered with by the signal sent by the base station. In this case, there may be interference between base stations. 
     SUMMARY 
     The following technical solutions are used in the embodiments of the present invention: 
     According to a first aspect of the embodiments of the present invention, an interference processing method is provided, and the interference processing method includes: receiving, by a target device, interference information sent by a first base station, where the interference information is used to indicate an interference parameter for interference from a second base station to the first base station, and the target device is the second base station or an interference management device; and determining, by the target device, a processing mode of the interference based on the interference parameter. 
     According to a second aspect of the embodiments of the present invention, an interference processing method is provided, and the interference processing method includes: sending, by a first base station, interference information to a target device, where the interference information is used to indicate an interference parameter for interference from a second base station to the first base station, and the target device is the second base station or an interference management device. 
     According to a third aspect of the embodiments of the present invention, a target device is provided, the target device is a second base station or an interference management device, and the target device includes a receiving unit and a determining unit. The receiving unit is configured to receive interference information sent by a first base station, where the interference information is used to indicate an interference parameter for interference from the second base station to the first base station. The determining unit is configured to determine a processing mode of the interference based on the interference parameter indicated by the interference information received by the receiving unit. 
     According to a fourth aspect of the embodiments of the present invention, a base station is provided, the base station is a first base station, and the base station includes a sending unit. The sending unit is configured to send interference information to a target device, where the interference information is used to indicate an interference parameter for interference from a second base station to the first base station, and the target device is the second base station or an interference management device. 
     According to a fifth aspect of the embodiments of the present invention, a target device is provided, the target device is a second base station or an interference management device, and the target device includes a processor, a memory, and a computer program that is stored in the memory and that can run on the processor. When the computer program is executed by the processor, steps of the interference processing method in the first aspect are implemented. 
     According to a sixth aspect of the embodiments of the present invention, a base station is provided, the base station is a first base station, and the base station includes a processor, a memory, and a computer program that is stored in the memory and that can run on the processor. When the computer program is executed by the processor, steps of the interference processing method in the second aspect are implemented. 
     According to a seventh aspect of the embodiments of the present invention, a communications system is provided, and he communications system includes the target device in the third aspect and the base station in the fourth aspect; or the communications system includes the target device in the fifth aspect and the base station in the sixth aspect. 
     According to an eighth aspect of the embodiments of the present invention, a computer-readable storage medium is provided, and the computer-readable storage medium stores a computer program. When the computer program is executed by a processor, steps of the interference processing method in the first aspect are implemented, or steps of the interference processing method in the second aspect are implemented. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is an architectural diagram  1  of a communications system according to an embodiment of the present invention; 
         FIG. 2  is an architectural diagram  2  of a communications system according to an embodiment of the present invention; 
         FIG. 3  is a schematic diagram  1  of an interference processing method according to an embodiment of the present invention; 
         FIG. 4  is a schematic diagram  2  of an interference processing method according to an embodiment of the present invention; 
         FIG. 5  is a schematic diagram  3  of an interference processing method according to an embodiment of the present invention; 
         FIG. 6  is a schematic diagram  4  of an interference processing method according to an embodiment of the present invention; 
         FIG. 7  is a schematic diagram  5  of an interference processing method according to an embodiment of the present invention; 
         FIG. 8  is a schematic structural diagram  1  of a target device according to an embodiment of the present invention; 
         FIG. 9  is a schematic structural diagram  2  of a target device according to an embodiment of the present invention; 
         FIG. 10  is a schematic structural diagram  3  of a target device according to an embodiment of the present invention; 
         FIG. 11  is a schematic structural diagram  1  of a base station according to an embodiment of the present invention; 
         FIG. 12  is a schematic structural diagram  2  of a base station according to an embodiment of the present invention; 
         FIG. 13  is a schematic structural diagram  3  of a base station according to an embodiment of the present invention; 
         FIG. 14  is a schematic structural diagram  4  of a base station according to an embodiment of the present invention; 
         FIG. 15  is a schematic diagram of hardware of an interference management device according to an embodiment of the present invention; and 
         FIG. 16  is a schematic diagram of hardware of a base station according to an embodiment of the present invention. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     The following clearly describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of this application. 
     In the specification and claims of the embodiments of the present invention, the terms such as “first” and “second” are used to distinguish between different objects, but are not used to describe a particular sequence of the objects. For example, first indication information and second indication information are intended to distinguish between different indication information, but do not describe a particular order of the indication information. In the description of the embodiments of the present invention, unless otherwise specified, the meaning of “a plurality of” means two or more. 
     The term “and/or” in this specification describes an association relationship of associated objects, indicating that three relationships may exist. For example, A and/or B may indicate three cases: Only A exists, both A and B exist, and only B exists. A character “I” in this specification indicates an “or” relationship between associated objects. For example, A/B indicates A or B. 
     In the embodiments of the present invention, the term such as “exemplary” or “for example” is used to indicate an example, an instance, or a description. Any embodiment or design solution described as “exemplary” or “for example” in the embodiments of the present invention should not be construed as being more preferred or advantageous than other embodiments or design solutions. To be precise, the use of the term such as “exemplary” or “for example” is intended to present a related concept in a specific manner. 
     Embodiments of the present invention provide an interference processing method, an apparatus, and a system. A target device may receive interference information sent by a first base station (the interference information is used to indicate an interference parameter for interference from a second base station to the first base station), and determine a processing mode of the interference based on the interference parameter. The target device may determine the processing mode of the interference based on the interference parameter for the interference from the second base station to the first base station, to process the interference from the second base station to the first base station. Therefore, the interference from the second base station to the first base station can be reduced, thereby improving performance of signal transmission between the first base station and the second base station. 
     The interference processing method, the apparatus, and the system provided in the embodiments of the present invention may be applied to a communications system. The interference processing method, the apparatus, and the system may be specifically applied to a process in which the target device determines, based on the communications system, a processing mode of interference generated between two base stations. 
     For example,  FIG. 1  is a schematic architectural diagram of a communications system according to an embodiment of the present invention. As shown in  FIG. 1 , the communications system may include a first base station  01 , a second base station  02 , and an interference management device  03 . 
     The first base station  01  may establish a connection and communicate with the interference management device  03 , and the second base station  02  may establish a connection and communicate with the interference management device  03 . 
     Optionally, in this embodiment of the present invention, the first base station  01  may be connected to the interference management device  03  through an existing network interface (for example, an X2 interface, an Xn interface, an S1 interface, an NG interface, an F1 interface, an ItfN interface, or an MS interface), or may be connected to the interference management device  03  through a new network interface (for example, an Xrim interface) (the Xrim interface is shown in  FIG. 1  as an example). The second base station  02  may be connected to the interference management device  03  through an existing network interface (for example, an X2 interface, an Xn interface, an S1 interface, an NG interface, an F1 interface, an ItfN interface, or an MS interface), or may be connected to the interference management device  03  by establishing a new network interface (for example, an Xrim interface) (the Xrim interface is shown in  FIG. 1  as an example). 
     A base station (for example, the first base station  01  and the second base station  02 ) is an apparatus deployed in a radio access network (Radio Access Network, RAN) to provide a wireless communication function for user equipment (User Equipment, UE). The base station may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different wireless access technologies, names of devices having base station functions may be different. For example, in a 3rd generation mobile communications (3G) network, the device is referred to as a NodeB (NodeB); in a long term evolution (Long Term Evolution, LTE) system, the device is referred to as an evolved NodeB (evolved NodeB, eNB or eNodeB); and in a 5th generation mobile communications (5G) network, the device is referred to as a gNB. With evolution of the communications technology, the name of the “base station” may change. The interference management device  03  may be a network management device (for example, OAM, that is, operation (Operation), administration (Administration), and maintenance (Maintenance)), or a third-party node (for example, a remote interference management coordination device (Remote Interfere Management Coordinator, RIMC)). The interference management device  03  is configured to coordinate processing on interference between the first base station  01  and the second base station  02 . It should be noted that if the first base station  01  and the second base station  02  belong to different network management devices (OAM), interference related information (for example, interference information and interference indication information) between the first base station  01  and the second base station  02  may be exchanged between the OAMs of the two base stations. 
     Optionally, the RIMC may be deployed at a different location from the OAM, or may be deployed at a same location as the OAM. 
     For example,  FIG. 2  is a schematic architectural diagram of another communications system according to an embodiment of the present invention. As shown in  FIG. 2 , the communications system may include a first base station  01  and a second base station  02 . The first base station  01  and the second base station  02  may establish a connection and communicate with each other. 
     Optionally, in this embodiment of the present invention, the first base station  01  may be connected to the second base station  02  by establishing an X2 interface, an Xn interface, or the like (the X2 interface is shown in  FIG. 1  as an example). 
     With reference to the accompanying drawings, the following describes in detail, based on specific embodiments and application scenarios of the embodiments, an interference processing method, an apparatus, and a system provided in the embodiments of the present invention. 
     It should be noted that the following separately describes in detail the interference processing methods provided in the embodiments of the present invention by using two specific embodiments (Embodiment 1 and Embodiment 2). 
     Embodiments of the present invention provide an interference processing method. Interaction (Embodiment 1) among a first base station, a second base station, and an interference management device (a target device is the interference management device), and interaction (Embodiment 2) between the first base station and the second base station (the target device is the second base station) are used as an example below to describe the interference processing method provided in the embodiments of the present invention. 
     Embodiment 1 
     Based on the communications system shown in  FIG. 1 , an embodiment of the present invention provides an interference processing method. As shown in  FIG. 3 , the interference processing method may include the following steps  101  to  103 . Step  101 : A first base station sends interference information to an interference management device. 
     In this embodiment of the present invention, the interference information is used to indicate an interference parameter for interference from a second base station to the first base station. 
     Optionally, in this embodiment of the present invention, a distance between the first base station and the second base station may be relatively far. For example, the distance between the first base station and the second base station is greater than a threshold. 
     Optionally, in this embodiment of the present invention, the first base station and the second base station may belong to different manufacturers or a same manufacturer. 
     It may be understood that, in this embodiment of the present invention, when the first base station is interfered with by the second base station, the first base station may send the interference information to the interference management device. 
     Optionally, in this embodiment of the present invention, the first base station may determine, by measuring signal strength, whether the first base station is interfered with. 
     Optionally, in this embodiment of the present invention, the interference parameter may include at least one of measured signal strength, interference frequency, an interference type, or the like. 
     It should be noted that interference between base stations may be classified into co-site interference and co-existing interference. In the co-site interference, two base stations share a same site, are close, and have lower isolation. In the co-existing interference, two base stations do not share a same site, are far away from each other, and have greater isolation. 
     Optionally, in this embodiment of the present invention, with reference to  FIG. 3 , as shown in  FIG. 4 , before step  101 , the interference processing method provided in this embodiment of the present invention may further include the following steps  201  to  204 . Step  201 : The first base station sends a first request message to the interference management device. It should be noted that, in this embodiment of the present invention, the first request message corresponds to a first target request message. In this embodiment of the present invention, the first request message is used to request to establish an interface between the first base station and the interference management device. 
     Step  202 : The second base station sends a second request message to the interference management device. 
     In this embodiment of the present invention, the second request message is used to request to establish an interface between the second base station and the interference management device. 
     It should be noted that a sequence of step  201  and step  202  is not limited in this embodiment of the present invention. That is, step  201  may be performed before step  202 , or step  202  may be performed before step  201 , or step  201  and step  202  may be simultaneously performed. 
     Step  203 : The interference management device receives the first request message sent by the first base station, and receives the second request message sent by the second base station. 
     It should be noted that, in this embodiment of the present invention, the interference management device may first receive the first request message sent by the first base station, and then receive the second request message sent by the second base station; or the interference management device may first receive the second request message sent by the second base station, and then receive the first request message sent by the first base station; or the interference management device may simultaneously receive the first request message sent by the first base station and the second request message sent by the second base station. 
     Step  204 : The interference management device establishes the interface between the interference management device and the first base station based on the first request message, and establishes the interface between the interference management device and the second base station based on the second request message. 
     It may be understood that, in this embodiment of the present invention, after the interface between the interference management device and the first base station is established, and the interface between the interference management device and the second base station is established, interference related information may be exchanged between the first base station and the interference management device, and interference related information may be exchanged between the second base station and the interference management device. 
     It should be noted that for the interface between the interference management device and the first base station established by the interference management device, and the interface between the interference management device and the second base station, refer to the descriptions of the foregoing embodiment. Details are not described herein again. 
     Step  102 : The interference management device receives the interference information. 
     Step  103 : The interference management device determines a processing mode of the interference based on the interference parameter indicated by the interference information. 
     In this embodiment of the present invention, the interference management device may determine the processing mode of the interference based on the interference parameter after determining that the first base station is interfered with by the second base station. 
     Optionally, in this embodiment of the present invention, the processing mode may include at least one of the following first mode or second mode. The first mode is: the interference management device sends second indication information to the first base station, where the second indication information is used to instruct the first base station to perform at least one of the following: adjusting at least one of information about an access channel, adjusting a sending resource of the first base station, or adjusting/lowering a level of a modulation and coding scheme (Modulation and Coding Scheme, MCS). The second mode is: the interference management device sends third indication information to the second base station, where the third indication information is used to indicate at least one of the following: the second base station reduces transmit power of the second base station, the second base station performs downlink backoff, the second base station increases the transmit power after reducing the transmit power for first duration, or the second base station cancels downlink backoff after performing downlink backoff for second duration. 
     Optionally, in this embodiment of the present invention, the first duration and the second duration may be the same or different. 
     Optionally, in this embodiment of the present invention, the information about the access channel may include at least one of information about a random access channel (Random Access Channel, RACH) or information about a newly defined uplink channel having a similar function to the RACH. 
     Optionally, in this embodiment of the present invention, the information about the newly defined uplink channel having the similar function to the RACH may include sequence information, and the sequence information may include at least one of index information of a sequence, a time domain resource of the sequence, or a frequency domain resource of the sequence. 
     Optionally, in this embodiment of the present invention, the sending resource of the first base station may include a time domain resource and/or a frequency domain resource of the first base station. 
     An embodiment of the present invention provides an interference processing method. An interference management device may receive interference information sent by a first base station (the interference information is used to indicate an interference parameter for interference from a second base station to the first base station), and determine a processing mode of the interference based on the interference parameter. The interference management device may determine the processing mode of the interference based on the interference parameter for the interference from the second base station to the first base station, to process the interference from the second base station to the first base station. Therefore, the interference from the second base station to the first base station can be reduced, thereby improving performance of signal transmission between the first base station and the second base station. 
     Optionally, in this embodiment of the present invention, with reference to  FIG. 3 , as shown in  FIG. 5 , step  103  may be specifically implemented by using the following steps  103   a  to  103   f.    
     Step  103   a : The interference management device sends first indication information to the first base station and the second base station based on the interference parameter indicated by the interference information. 
     In this embodiment of the present invention, the first indication information is used to indicate a first parameter of a reference signal (Reference Signal, RS), and the first parameter includes a first sending resource of the RS. 
     It should be noted that, in this embodiment of the present invention, the first indication information corresponds to first target indication information. 
     It may be understood that, in this embodiment of the present invention, the interference management device may enable an RIM function based on the interference parameter indicated by the interference information, and send the first indication information to the first base station to instruct the first base station to send the first parameter of the RS to the first base station, and send the first indication information to the second base station to instruct the second base station to receive the first parameter of the RS. 
     Optionally, in this embodiment of the present invention, the first sending resource of the RS may include at least one of a time domain resource of the RS (or a sequence location of the RS) or a frequency domain resource of the RS. 
     Step  103   b : The first base station receives the first indication information, and the second base station receives the first indication information. 
     Step  103   c : The first base station sends the RS on the first sending resource that is of the RS and that is indicated by the first indication information. 
     Step  103   d : The second base station receives, on the first sending resource that is of the RS and that is indicated by the first indication information, the RS sent by the first base station, and measures the RS to obtain a measurement result. 
     In this embodiment of the present invention, the measurement result is a result of measuring the RS sent by the first base station on the first sending resource by the second base station. 
     Optionally, in this embodiment of the present invention, when measuring an RS, the second base station may measure at least one of a signal length, signal strength, signal quality, and the like of the RS to obtain a measurement result. 
     Step  103   e : The second base station sends the measurement result to the interference management device. 
     Step  103   f : The interference management device receives the measurement result, and determines the processing mode of the interference based on the measurement result. 
     In this embodiment of the present invention, the interference management device may determine the processing mode of the interference based on the measurement result after determining that the first base station is interfered with by the second base station. 
     In this embodiment of the present invention, the second base station may measure, based on the first indication information sent by the interference management device (the first indication information is used to indicate the first parameter of the RS, and the first parameter includes the first sending resource of the RS), the RS sent by the first base station on the first sending resource, to obtain the measurement result. The interference management device may determine the processing mode of the interference based on the measurement result sent by the second base station, to process the interference from the second base station to the first base station. Therefore, the interference from the second base station to the first base station can be reduced, thereby improving performance of signal transmission between the first base station and the second base station. 
     Optionally, in this embodiment of the present invention, after step  103 , the interference processing method provided in this embodiment of the present invention may further include the following steps  301  to  303 . 
     Step  301 : The interference management device processes the interference in the processing mode of the interference. 
     Optionally, in this embodiment of the present invention, the interference management device may send second indication information to the first base station, to instruct the first base station to perform at least one of the following: switching/adjusting information about an RACH, switching a sending resource of the first base station, and switching/lowering a level of an MCS; and/or the interference management device may send third indication information to the second base station, to instruct the second base station to reduce transmit power of the second base station or instruct the second base station to perform downlink backoff. 
     Step  302 : If a degree of the interference from the second base station to the first base station is less than or equal to a first threshold, the first base station sends feedback information to the interference management device. 
     In this embodiment of the present invention, the feedback information is used to indicate that the degree of the interference from the second base station to the first base station is less than or equal to the first threshold. 
     It should be noted that, in this embodiment of the present invention, the first threshold corresponds to the second target threshold. Optionally, in this embodiment of the present invention, the first base station may periodically measure signal strength/measure signal strength in a real-time manner to determine whether the degree of the interference from the second base station to the first base station is less than or equal to the first threshold. 
     Optionally, in this embodiment of the present invention, the degree of interference from the second base station to the first base station is determined by at least one of the following: a result of measuring an RS sent by the first base station by the second base station, or the feedback information sent by the first base station. Step  303 : The interference management device receives the feedback information sent by the first base station. 
     In this embodiment of the present invention, when the degree of the interference from the second base station to the first base station is less than or equal to the first threshold, the first base station may send the feedback information to the interference management device, to feed back, to the interference management device, that the interference from the second base station to the first base station is reduced. 
     Optionally, in this embodiment of the present invention, after step  103 , the interference processing method provided in this embodiment of the present invention may further include the following steps  401  to  403 . 
     Step  401 : The interference management device processes the interference in the processing mode of the interference. 
     Step  402 : If the interference management device determines that the degree of the interference from the second base station to the first base station is less than or equal to the first threshold, the interference management device sends fourth indication information to the first base station. 
     In this embodiment of the present invention, the fourth indication information is used to instruct the first base station to stop sending an RS. 
     It should be noted that, in this embodiment of the present invention, the fourth indication information corresponds to second target indication information. 
     Step  403 : The first base station receives the fourth indication information sent by the interference management device, and stops sending an RS according to an instruction of the fourth indication information. 
     Optionally, in this embodiment of the present invention, if the interference management device determines that the degree of the interference from the second base station to the first base station is less than or equal to the first threshold, the interference management device may disable the RIM function. 
     In this embodiment of the present invention, if the interference management device determines that the degree of the interference from the second base station to the first base station is less than or equal to the first threshold, the interference management device may send the fourth indication information to the first base station to instruct the first base station to stop sending the RS, so that the first base station can stop sending the RS if the degree of the interference from the second base station to the first base station is less than or equal to the first threshold, thereby reducing power consumption of the first base station. 
     Optionally, in this embodiment of the present invention, after step  103 , the interference processing method provided in this embodiment of the present invention may further include the following steps  501  to  503 . 
     Step  501 : The interference management device processes the interference in the processing mode of the interference. 
     Step  502 : If the interference management device determines that the degree of the interference from the second base station to the first base station is less than or equal to the first threshold, the interference management device sends fifth indication information to the first base station and the second base station. 
     In this embodiment of the present invention, the fifth indication information is used to indicate a second parameter of an RS, and the second parameter includes a second sending resource of the RS. 
     It should be noted that, in this embodiment of the present invention, the fifth indication information corresponds to third target indication information. 
     It should be noted that for descriptions of the second parameter, refer to the specific descriptions of the first parameter in the foregoing embodiment. Details are not described herein again. 
     Step  503 : The first base station receives the fifth indication information sent by the interference management device, and the second base station receives the fifth indication information sent by the interference management device. 
     It should be noted that, in this embodiment of the present invention, after step  503 , the following may be further performed: The first base station sends the RS on the second sending resource that is of the RS and that is indicated by the fifth indication information; the second base station receives, on the second sending resource that is of the RS and that is indicated by the fifth indication information, the RS sent by the first base station, and measures the RS to obtain a measurement result; the second base station sends the measurement result to the interference management device; and the interference management device receives the measurement result, and determines the processing mode based on the measurement result. 
     In this embodiment of the present invention, if the interference management device determines that the degree of the interference from the second base station to the first base station is less than or equal to the first threshold, the interference management device may send the fifth indication information to the first base station and the second base station to indicate the second parameter of the RS (the second parameter includes the second sending resource of the RS), so that the second base station can measure the RS sent by the first base station on the second sending resource, to obtain the measurement result, and the interference management device can determine the processing mode of the interference based on the measurement result sent by the second base station, to process the interference from the second base station to the first base station. Therefore, interference from the second base station to the first base station can be more accurately and effectively reduced, thereby further improving performance of signal transmission between the first base station and the second base station. 
     It should be noted that in this embodiment of the present invention, if the interference management device determines that the degree of the interference from the second base station to the first base station is greater than the first threshold, step  101  to step  103  in Embodiment 1 and other steps are cyclically performed. 
     Embodiment 2 
     Based on the communications system shown in  FIG. 2 , an embodiment of the present invention provides an interference processing method. As shown in  FIG. 6 , the interference processing method may include the following steps  601  to  603 . 
     Step  601 : A first base station sends interference information to a second base station. 
     In this embodiment of the present invention, the interference information is used to indicate an interference parameter for interference from the second base station to the first base station. 
     It should be noted that for descriptions of step  601 , refer to the specific descriptions of step  101  in the foregoing embodiment. Details are not described herein again. 
     Optionally, in this embodiment of the present invention, with reference to  FIG. 6 , as shown in  FIG. 7 , before step  601 , the interference processing method provided in this embodiment of the present invention may further include the following steps  701  to  705 . 
     Step  701 : The second base station sends system information. 
     In this embodiment of the present invention, the system information is used to indicate an identifier of the second base station, the identifier of the second base station is used by the first base station to send a third request message to the second base station, and the third request message is used to request to establish an interface between the first base station and the second base station. 
     It may be understood that, in this embodiment of the present invention, the second base station sends the system information in a broadcast form. 
     Optionally, in this embodiment of the present invention, the identifier of the second base station may be an identifier of a cell that provides a service for the second base station, for example, a Cell global identifier (Cell Global Identifier, CGI), a tracking area code (Tracking Area Code, TAC), or a public land mobile network (Public Land Mobile Network, PLMN). 
     Step  702 : If the first base station is interfered with, the first base station obtains target system information. 
     In this embodiment of the present invention, signal strength of the target system information is greater than or equal to a first target threshold, and the target system information includes the identifier of the second base station. 
     In this embodiment of the present invention, if the first base station is interfered with, the first base station measures signal strength of system information sent by a plurality of base stations (the plurality of base stations include the second base station), and determines system information of the second base station as the target system information if signal strength of the system information of the second base station is greater than or equal to the first target threshold. 
     It may be understood that, in this embodiment of the present invention, the interference from the second base station to the first base station may be determined if the signal strength of the system information of the second base station is greater than or equal to the first target threshold. 
     Step  703 : The first base station sends a third request message to the second base station based on an identifier of the second base station included in the target system information. 
     It should be noted that, in this embodiment of the present invention, the third request message corresponds to a second target request message. 
     Step  704 : The second base station receives the third request message. 
     Step  705 : The first base station establishes an interface between the first base station and the second base station, and the second base station establishes an interface between the second base station and the first base station based on the third request message. 
     It may be understood that, in this embodiment of the present invention, after the interface between the first base station and the second base station is established, the first base station and the second base station may exchange interference related information. For example, the first base station may send the interference information to the second base station. 
     It should be noted that for the interface between the first base station and the second base station established by the first base station, and the interface between the second base station and the first base station established by the second base station, refer to the descriptions of the foregoing embodiment. Details are not described herein again. 
     Step  602 : The second base station receives the interference information. 
     Step  603 : The second base station determines a processing mode of the interference based on the interference parameter indicated by the interference information. 
     Optionally, in this embodiment of the present invention, the processing mode may include at least one of the following: the second base station reduces transmit power of the second base station, the second base station performs downlink backoff, the second base station increases the transmit power after reducing the transmit power for third duration, or the second base station cancels downlink backoff after performing downlink backoff for fourth duration. 
     Optionally, in this embodiment of the present invention, the third duration and the fourth duration may be the same or different. 
     It may be understood that, in this embodiment of the present invention, the second base station may start a timer, and after the third duration, increase the transmit power of the second base station from transmit power  2  to transmit power  3  starting from a moment at which the transmit power of the second base station (transmit power  1 ) is reduced to the transmit power  2 . The transmit power  3  is greater than the transmit power  2 . It should be noted that the transmit power  3  may be less than the transmit power  1 , or may be equal to the transmit power  1 , or may be greater than the transmit power  1 . 
     An embodiment of the present invention provides an interference processing method. A second base station may receive interference information sent by a first base station (the interference information is used to indicate an interference parameter for interference from the second base station to the first base station), and determine a processing mode of the interference based on the interference parameter. The second base station may determine the processing mode of the interference based on the interference parameter for the interference from the second base station to the first base station, to process the interference from the second base station to the first base station. Therefore, the interference from the second base station to the first base station can be reduced, thereby improving performance of signal transmission between the first base station and the second base station. 
     Optionally, in this embodiment of the present invention, after step  603 , the interference processing method provided in this embodiment of the present invention may further include the following steps  801  to  803 . 
     Step  801 : The second base station processes the interference in the processing mode of the interference. 
     Optionally, in this embodiment of the present invention, the second base station may reduce transmit power of the second base station, perform downlink backoff, increase the transmit power after reducing the transmit power for third duration, and/or cancel downlink backoff after performing downlink backoff for fourth duration. 
     Step  802 : If a degree of the interference from the second base station to the first base station is less than or equal to a second target threshold, the first base station releases the interface between the first base station and the second base station. 
     It should be noted that, in this embodiment of the present invention, for descriptions of the degree of the interference from the second base station to the first base station, refer to the specific descriptions of the foregoing embodiment. Details are not described herein again. 
     Step  803 : If the second base station fails, within fifth duration, to receive the interference information sent by the first base station, the second base station releases the interface between the second base station and the first base station after the fifth duration. 
     It may be understood that, in this embodiment of the present invention, after the second base station increases the transmit power after reducing the transmit power for the third duration, and/or the second base station cancels downlink backoff after performing downlink backoff for the fourth duration, if the interference information sent by the first base station is not received within the fifth duration, the interface between the second base station and the first base station is released after the fifth duration. 
     It should be noted that, in this embodiment of the present invention, if the second base station receives, within the fifth duration, the interference information sent by the first base station, the second base station cyclically performs steps  601  to  603  in Embodiment 2 and other steps. 
     In this embodiment of the present invention, if the degree of the interference from the second base station to the first base station is less than or equal to the second target threshold, the first base station may release the interface between the first base station and the second base station. Therefore, a memory of the first base station can be released and storage space of the first base station can be saved. If the second base station fails, within the fifth duration, to receive the interference information sent by the first base station, the second base station releases the interface between the second base station and the first base station after the fifth duration. Therefore, a memory of the second base station can be released and storage space of the second base station can be saved. 
     Optionally, in this embodiment of the present invention, after step  603 , the interference processing method provided in this embodiment of the present invention may further include the following steps  901  to  903 . 
     Step  901 : The second base station processes the interference in the processing mode of the interference. 
     Step  902 : If a degree of the interference from the second base station to the first base station is less than or equal to a first threshold, the first base station sends feedback information to the second base station. 
     In this embodiment of the present invention, the feedback information is used to indicate that the degree of the interference from the second base station to the first base station is less than or equal to the first threshold. 
     It should be noted that, in this embodiment of the present invention, the first threshold corresponds to the second target threshold. 
     Optionally, in this embodiment of the present invention, the degree of interference from the second base station to the first base station is determined by at least one of the following: a result of measuring an RS sent by the first base station by the second base station, or the feedback information sent by the first base station. 
     Step  903 : The second base station receives the feedback information sent by the first base station. 
     It should be noted that in this embodiment of the present invention, for descriptions of step  902  and step  903 , refer to the specific descriptions of step  302  and step  303  in the foregoing embodiment. Details are not described herein again. 
     In this embodiment of the present invention, when the degree of the interference from the second base station to the first base station is less than or equal to the first threshold, the first base station may send the feedback information to the second base station, to feed back, to the second base station, that the interference from the second base station to the first base station is reduced. 
       FIG. 8  is a possible schematic structural diagram of a target device according to an embodiment of the present invention. The target device may be the second base station or the interference management device in the foregoing embodiment. As shown in  FIG. 8 , a target device  80  provided in this embodiment of the present invention may include a receiving unit  81  and a determining unit  82 . 
     The receiving unit  81  is configured to receive interference information sent by a first base station, where the interference information is used to indicate an interference parameter for interference from the second base station to the first base station. The determining unit  82  is configured to determine a processing mode of the interference based on the interference parameter indicated by the interference information received by the receiving unit  81 . 
     In a possible implementation, the target device is the interference management device. The determining unit  82  is specifically configured to: send first indication information to the first base station and the second base station based on the interference parameter, where the first indication information is used to indicate a first parameter of an RS, and the first parameter includes a first sending resource of the RS; receive a measurement result sent by the second base station, where the measurement result is a result of measuring the RS sent by the first base station on the first sending resource by the second base station; and determine the processing mode based on the measurement result. 
     In a possible implementation, the processing mode may include at least one of a first mode or a second mode. The first mode may be: the interference management device sends second indication information to the first base station, where the second indication information is used to instruct the first base station to adjust at least one of information about an access channel, a sending resource of the first base station, or a level of an MCS. The second mode may be: the interference management device sends third indication information to the second base station, where the third indication information is used to indicate at least one of the following: the second base station reduces transmit power of the second base station, the second base station performs downlink backoff, the second base station increases the transmit power after reducing the transmit power for first duration, or the second base station cancels downlink backoff after performing downlink backoff for second duration. 
     In a possible implementation, the receiving unit  81  is further configured to: before receiving the interference information sent by the first base station, receive a first request message sent by the first base station, and receive a second request message sent by the second base station, where the first request message is used to request to establish an interface between the first base station and the interference management device, and the second request message is used to request to establish an interface between the second base station and the interference management device. The target device  80  provided in this embodiment of the present invention may further include an establishing unit. The establishing unit is configured to: establish the interface between the interference management device and the first base station based on the first request message received by the receiving unit  81 , and establish the interface between the interference management device and the second base station based on the second request message received by the receiving unit  81 . 
     In a possible implementation, the target device is the second base station. The processing mode may include at least one of the following: the second base station reduces transmit power of the second base station, the second base station performs downlink backoff, the second base station increases the transmit power after reducing the transmit power for third duration, or the second base station cancels downlink backoff after performing downlink backoff for fourth duration. 
     In a possible implementation, with reference to  FIG. 8 , as shown in  FIG. 9 , the target device  80  provided in this embodiment of the present invention may further include a sending unit  83  and an establishing unit  84 . The sending unit  83  is configured to send system information before the receiving unit  81  receives the interference information sent by the first base station, where the system information is used to indicate an identifier of the second base station, the identifier of the second base station is used by the first base station to send a third request message to the second base station, and the third request message is used to request to establish an interface between the first base station and the second base station. The receiving unit  81  is further configured to receive the third request message sent by the first base station. The establishing unit  84  is configured to establish the interface between the second base station and the first base station based on the third request message received by the receiving unit  81 . 
     In a possible implementation, with reference to  FIG. 9 , as shown in  FIG. 10 , the target device  80  provided in this embodiment of the present invention may further include a releasing unit  85 . The releasing unit  85  is configured to: after the second base station processes the interference in the processing mode, if the second base station fails, within fifth duration, to receive the interference information sent by the first base station, release, after the fifth duration, the interface between the second base station and the first base station that is established by the establishing unit  84 . 
     In a possible implementation, the receiving unit  81  is further configured to: after the target device processes the interference in the processing mode, receive feedback information sent by the first base station, where the feedback information is used to indicate that a degree of the interference from the second base station to the first base station is less than or equal to a first threshold. 
     In a possible implementation, the target device  80  provided in this embodiment of the present invention may further include a sending unit. The sending unit is further configured to: if the target device determines that the degree of the interference from the second base station to the first base station is less than or equal to the first threshold, send fourth indication information to the first base station, where the fourth indication information is used to instruct the first base station to stop sending an RS; or if the target device determines that the degree of the interference from the second base station to the first base station is less than or equal to the first threshold, send fifth indication information to the first base station and the second base station, where the fifth indication information is used to indicate a second parameter of an RS, and the second parameter includes a second sending resource of the RS. 
     In a possible implementation, the degree of interference from the second base station to the first base station is determined by at least one of the following: a result of measuring an RS sent by the first base station by the second base station, or the feedback information sent by the first base station. 
     The target device provided in this embodiment of the present invention can implement the processes implemented by the target device in the foregoing method embodiments. To avoid repetition, details are not described herein again. 
     An embodiment of the present invention provides a target device. The target device may receive interference information sent by a first base station (the interference information is used to indicate an interference parameter for interference from a second base station to the first base station), and determine a processing mode of the interference based on the interference parameter. The target device may determine the processing mode of the interference based on the interference parameter for the interference from the second base station to the first base station, to process the interference from the second base station to the first base station. Therefore, the interference from the second base station to the first base station can be reduced, thereby improving performance of signal transmission between the first base station and the second base station. 
       FIG. 11  is a possible schematic structural diagram of a base station according to an embodiment of the present invention. The base station may be the first base station in the foregoing embodiment. As shown in  FIG. 11 , a base station  90  provided in this embodiment of the present invention includes a sending unit  91 . 
     The sending unit  91  is configured to send interference information to a target device, where the interference information is used to indicate an interference parameter for interference from a second base station to the first base station, and the target device is the second base station or an interference management device. 
     In a possible implementation, the target device is the interference management device. With reference to  FIG. 11 , as shown in  FIG. 12 , the base station  90  provided in this embodiment of the present invention may further include a receiving unit  92 . The receiving unit  92  is configured to: after the sending unit  91  sends the interference information to the target device, receive first target indication information sent by the interference management device, where the first target indication information is used to indicate a first parameter of an RS, and the first parameter includes a first sending resource of the RS. The sending unit  91  is further configured to send the RS on the first sending resource indicated by the first target indication information received by the receiving unit  92 . 
     In a possible implementation, the sending unit  91  is further configured to: before sending the interference information to the target device, send a first target request message to the interference management device, where the first target request message is used to request to establish an interface between the first base station and the interference management device. 
     In a possible implementation, the target device is the second base station. With reference to  FIG. 11 , as shown in  FIG. 13 , the base station  90  provided in this embodiment of the present invention may further include an obtaining unit  93  and an establishing unit  94 . The obtaining unit  93  is configured to: before the sending unit  91  sends the interference information to the target device, if the first base station is interfered with, obtain target system information, where signal strength of the target system information is greater than or equal to a first target threshold, and the target system information includes an identifier of the second base station. The sending unit  91  is further configured to send a second target request message to the second base station based on the identifier of the second base station included in the target system information obtained by the obtaining unit  93 , where the second target request message is used to request to establish an interface between the first base station and the second base station. The establishing unit  94  is configured to establish the interface between the first base station and the second base station. 
     In a possible implementation, with reference to  FIG. 13 , as shown in  FIG. 14 , the base station  90  provided in this embodiment of the present invention may further include a releasing unit  95 . The releasing unit  95  is configured to: if a degree of the interference from the second base station to the first base station is less than or equal to a second target threshold, release the interface between the first base station and the second base station established by the establishing unit  94 . 
     In a possible implementation, the sending unit  91  is further configured to: if a degree of the interference from the second base station to the first base station is less than or equal to a second target threshold, send feedback information to the target device, where the feedback information is used to indicate that the degree of the interference from the second base station to the first base station is less than or equal to the second target threshold. 
     In a possible implementation, with reference to  FIG. 11 , as shown in  FIG. 12 , the base station  90  provided in this embodiment of the present invention further includes a receiving unit  92 . The receiving unit  92  is configured to: if the degree of the interference from the second base station to the first base station is less than or equal to the second target threshold, receive second target indication information sent by the target device, where the second target indication information is used to instruct the first base station to stop sending an RS; or if the degree of the interference from the second base station to the first base station is less than or equal to the second target threshold, receive third target indication information sent by the target device, where the third target indication information is used to indicate a second parameter of an RS, and the second parameter includes a second sending resource of the RS. 
     The base station provided in this embodiment of the present invention can implement the processes implemented by the first base station in the foregoing method embodiments. To avoid repetition, details are not described herein again. 
     An embodiment of the present invention provides a base station. A first base station may send interference information to a second base station (the interference information is used to indicate an interference parameter for interference from a second base station to the first base station), so that the second base station can determine a processing mode of the interference based on the interference parameter indicated by the interference information sent by the first base station. The second base station may determine the processing mode of the interference based on the interference parameter for the interference from the second base station to the first base station, to process the interference from the second base station to the first base station. Therefore, the interference from the second base station to the first base station can be reduced, thereby improving performance of signal transmission between the first base station and the second base station. 
       FIG. 15  is a schematic diagram of hardware of an interference management device according to an embodiment of the present invention. As shown in  FIG. 15 , the interference management device  150  includes but is not limited to at least one processor  151 , a memory  152 , a user interface  153 , and at least one network interface  154 . All components of the interference management device  150  are coupled together by using a bus system  155 . 
     It should be noted that, a person skilled in the art may understand that a structure of the interference management device shown in  FIG. 15  does not constitute a limitation on the interference management device, and the interference management device may include more or fewer parts than those shown in  FIG. 15 , or combine some parts, or have different part arrangements. 
     The network interface  154  is configured to receive interference information sent by a first base station, where the interference information is used to indicate an interference parameter for interference from a second base station to the first base station. The processor  151  is configured to determine a processing mode of the interference based on the interference parameter indicated by the interference information received by the network interface  154 . 
     An embodiment of the present invention provides an interference management device. The interference management device may receive interference information sent by a first base station (the interference information is used to indicate an interference parameter for interference from a second base station to the first base station), and determine a processing mode of the interference based on the interference parameter. The interference management device may determine the processing mode of the interference based on the interference parameter for the interference from the second base station to the first base station, to process the interference from the second base station to the first base station. Therefore, the interference from the second base station to the first base station can be reduced, thereby improving performance of signal transmission between the first base station and the second base station. 
     It may be understood that the bus system  155  is configured to implement a connection and communication between these components. In addition to a data bus, the bus system  155  may include a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are marked as the bus system  155  in  FIG. 15 . 
     The user interface  153  may include a display, a keyboard, a clicking device (for example, a mouse, a trackball, a touch panel, or a touchscreen), or the like. 
     It may be understood that the memory  152  in this embodiment of the present invention may be a volatile memory or a non-volatile memory, or may include both a volatile memory and a non-volatile memory. The nonvolatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically erasable programmable read-only memory (Electrically EPROM, EEPROM), or a flash memory. The volatile memory may be a random access memory (Random Access Memory, RAM), used as an external cache. Through example but not limitative description, many forms of RAMs may be used, for example, a static random access memory (Static RAM, SRAM), a dynamic random access memory (Dynamic RAM, DRAM), a synchronous dynamic random access memory (Synchronous DRAM, SDRAM), a double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), an enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), a synchlink dynamic random access memory (Synch link DRAM, SLDRAM), and a direct rambus random access memory (Direct Rambus RAM, DRRAM). The memory  152  described in this embodiment of the present invention is intended to include but not limited to these memories and any memory of another proper type. 
     In some implementations, the memory  152  stores the following element: an executable module or a data structure, a subset thereof, or an extended set thereof: an operating system  1521  and an application program  1522 . 
     The operating system  1521  includes various system programs, for example, a framework layer, a kernel library layer, and a driver layer, and is configured to implement various basic services and process hardware-based tasks. The application program  1522  includes various application programs, for example, a media player, and a browser, and is configured to implement various application services. A program for implementing the method in this embodiment of the present invention may be included in the application program  1522 . 
     In this embodiment of the present invention, the interference management device  150  may further include a computer program that is stored in the memory  152  and that may run on the processor  151 . When the computer program is executed by the processor  151 , steps of the method provided in the embodiments of the present invention are implemented. 
     The method disclosed in the foregoing embodiment of the present invention may be applied to the processor  151 , or implemented by the processor  151 . The processor  151  may be an integrated circuit chip having a signal processing capability. During implementation, the steps of the foregoing method can be completed by hardware integrated logic circuits in the processor  151  or instructions in the form of software. The processor  151  may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA), another programmable logic device, a discrete gate, a transistor logic device, or a discrete hardware component. The processor may implement or perform the methods, the steps, and logical block diagrams that are disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or may be any conventional processor or the like. Steps of the methods disclosed with reference to the embodiments of the present invention may be directly executed and accomplished through a hardware decoding processor, or may be executed and accomplished by using a combination of hardware and software modules in the decoding processor. The software module may be located in a mature computer-readable storage medium in this field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, or a register. The computer-readable storage medium is located in the memory  152 , and the processor  151  reads information from the memory  152  and completes the steps of the foregoing method in combination with its hardware. Specifically, the computer readable storage medium stores a computer program. When the computer program is executed by the processor  151 , steps of the method provided in the embodiments of the present invention are implemented. 
     It may be understood that the embodiments described in the embodiments of the present invention may be implemented by hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, a processing unit may be implemented in one or more ASICs, DSPs, digital signal processing devices (DSP Device, DSPD), programmable logic devices (Programmable Logic Device, PLD), FPGAs, general purpose processors, controllers, microcontrollers, microprocessors, other electronic units configured to perform the functions in the present invention, or a combination thereof. 
     For software implementation, the technology described in the embodiments of the present invention may be implemented by using a module (for example, a process or a function) that performs the function in the embodiments of the present invention. Software codes can be stored in the memory and executed by the processor. The memory can be implemented inside or outside the processor. 
     Optionally, an embodiment of the present invention further provide an interference management device, including at least one processor  151  shown in  FIG. 15 , a memory  152 , and a computer program that is stored in the memory  152  and that can run on the processor  151 . When the computer program is executed by the processor  151 , processes of the foregoing method embodiment are implemented, and a same technical effect can be achieved. To avoid repetition, details are not described herein again. 
       FIG. 16  is a schematic diagram of hardware of a base station according to an embodiment of the present invention. The base station may be the first base station or the second base station in the foregoing embodiment. As shown in  FIG. 16 , a base station  160  includes at least one processor  161 , a transceiver  162 , a memory  163 , a user interface  164 , and a bus interface  165 . 
     When the base station shown in  FIG. 16  is the first base station, the transceiver  162  is configured to send interference information to a target device, where the interference information is used to indicate an interference parameter for interference from a second base station to the first base station, and the target device is the second base station or an interference management device. 
     An embodiment of the present invention provides a base station, and the base station is a first base station. The first base station may send interference information to a second base station (the interference information is used to indicate an interference parameter for interference from a second base station to the first base station), so that the second base station can determine a processing mode of the interference based on the interference parameter indicated by the interference information sent by the first base station. The second base station may determine the processing mode of the interference based on the interference parameter for the interference from the second base station to the first base station, to process the interference from the second base station to the first base station. Therefore, the interference from the second base station to the first base station can be reduced, thereby improving performance of signal transmission between the first base station and the second base station. 
     When the base station shown in  FIG. 16  is the second base station, the transceiver  162  is configured to receive interference information sent by a first base station, where the interference information is used to indicate an interference parameter for interference from the second base station to the first base station. The processor  161  is configured to determine a processing mode of the interference based on the interference parameter indicated by the interference information received by the transceiver  162 . 
     An embodiment of the present invention provides a base station, and the base station is a second base station. The second base station may receive interference information sent by a first base station (the interference information is used to indicate an interference parameter for interference from the second base station to the first base station), and determine a processing mode of the interference based on the interference parameter. The second base station may determine the processing mode of the interference based on the interference parameter for the interference from the second base station to the first base station, to process the interference from the second base station to the first base station. Therefore, the interference from the second base station to the first base station can be reduced, thereby improving performance of signal transmission between the first base station and the second base station. 
     The processor  161  may be responsible for managing a bus architecture and general processing, and the processor  161  may be configured to read and execute a program in the memory  163  to implement function processing and control on the base station  160 . The memory  163  may store data used by the processor  161  when the processor  161  performs an operation. The processor  161  and the memory  163  may be integrated together or disposed separately. 
     In this embodiment of the present invention, the base station  160  may further include: a computer program stored in the memory  163  and executable on the processor  161 , where the computer program, when executed by the processor  161 , implements the steps of the methods provided in the embodiments of the present invention. 
     In  FIG. 16 , a bus architecture may include any quantity of interconnected buses and bridges, which are specifically connected together by one or more processors represented by the processor  161  and various circuits of a memory represented by the memory  163 . The bus architecture may further link various other circuits such as a peripheral device, a voltage regulator, and a power management circuit. These are well known in the art, and therefore are not further described in the embodiments of the present invention. The bus interface provides an interface. The transceiver  162  may include a plurality of elements, that is, include a transmitter and a receiver, and provide units for communication with various other apparatuses on a transmission medium. The user interface  164  may be alternatively an interface that can be externally or internally connected to a required device, and the connected device includes but is not limited to a keypad, a display, a loudspeaker, a microphone, and a joystick. 
     Optionally, an embodiment of the present invention further provides a base station, including at least one processor  161  shown in  FIG. 16 , a memory  162 , and a computer program that is stored in the memory  162  and that may run on the processor  161 . When the computer program is executed by the processor  161 , processes of the foregoing method embodiment are implemented, and a same technical effect can be achieved. To avoid repetition, details are not described herein again. 
     An embodiment of the present invention further provides a computer readable storage medium. The computer readable storage medium stores a computer program. When the computer program is executed by the processor  151  shown in  FIG. 15  or the processor  161  shown in  FIG. 16 , processes of the foregoing method embodiment are implemented, and a same technical effect can be achieved. To avoid repetition, details are not described herein again. The computer readable storage medium includes a ROM, a RAM, a magnetic disk, an optical disc, or the like. 
     It should be noted that, in this specification, the terms “include”, “comprise”, or their any other variant is intended to cover a non-exclusive inclusion, so that a process, a method, an article, or an apparatus that includes a list of elements not only includes those elements but also includes other elements which are not expressly listed, or further includes elements inherent to such process, method, article, or apparatus. In the absence of more restrictions, an element defined by the statement “including a . . . ” does not exclude another same element in a process, method, article, or apparatus that includes the element. 
     According to the foregoing descriptions of the implementations, a person skilled in the art may clearly understand that the foregoing method embodiments may be implemented by using software and a required universal hardware platform, or certainly may be implemented by using hardware. However, in many cases, the former is a better implementation. Based on such an understanding, the technical solutions of this application essentially, or the part contributing to the prior art may be implemented in a form of a software product. The computer software product is stored in a storage medium (for example, a ROM/RAM, a magnetic disk, or a compact disc), and includes a plurality of instructions for instructing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, a network device, or the like) to perform the method described in the embodiments of this application. 
     The embodiments of this application are described above with reference to the accompanying drawings, but this application is not limited to the foregoing specific implementations. The foregoing specific implementations are merely schematic instead of restrictive. Under enlightenment of this application, a person of ordinary skills in the art may make many forms without departing from the protection scope of aims of this application and claims, all of which fall within the protection of this application.