Patent Publication Number: US-2019191353-A1

Title: Method for processing information or message, and network device

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of International Application No. PCT/CN2016/096438, filed on Aug. 23, 2016, the disclosure of which is hereby incorporated by reference in its entirety. 
    
    
     TECHNICAL FIELD 
     The present application relates to the communications field, and in particular, to a method for processing information or a message, and a network device. 
     BACKGROUND 
     With rapid development of communications technologies, communications networks provide increasingly abundant services to users. Therefore, a network side communicates more frequently with user equipment (UE). 
     In many cases, a network side in a communications network needs to frequently send a message to user equipment. For example, during session management in an evolved packet system (EPS), the UE and a core network need to synchronize a session context, for example, synchronize bearer context information in a session. When the network side modifies session information, the network side needs to send a session update message to the UE in time, to notify the UE of the modified session information. 
     When the network side processes information about the UE, if the UE is in a connected mode, the network side may directly send the information. If the UE is in an idle mode (for example, an idle mode), the network side usually initiates a paging procedure to the UE, so that the UE enters the connected mode by using a service request procedure, to receive the information and execute content indicated by the information. For example, during the session management in the EPS, the network side sends a paging message to the UE in the idle mode, so that the UE enters the connected mode to perform a session synchronization process, and obtain updated session information. 
     However, it can be learned from the foregoing process in which the network side processes the information about the UE in the idle mode that, in a scenario without data transmission or in a scenario in which the modified information is specific to a service transmitted by using existing channel information within a short time, in a process in which the UE enters the connected mode by using the paging procedure, additional signaling overheads are caused, and signaling overheads of an air interface are increased. 
     SUMMARY 
     Embodiments of the present application provide a method for processing information or a message, and a network device, to reduce signaling overheads for paging UE, and reduce signaling overheads of an air interface. 
     To achieve the foregoing objective, the following technical solutions are used in the embodiments of the present application: 
     According to a first aspect of this application, this application provides a method for processing information, where the information is information about UE in an idle mode. The method is applied to a first network device, and the method specifically includes: receiving, by the first network device, first information of the UE sent by a second network device; and determining, by the first network device, a sending manner of the first information based on sending manner related information of the first information, where the sending manner includes immediate sending, delayed sending, or delayed and scheduled sending. 
     According to the method for processing information provided in this application, the UE is in the idle mode, and when receiving the first information of the UE sent by the second network device, the first network device determines the sending manner of the first information based on the sending manner related information of the first information, and determines whether to immediately send the first information to the UE. When the determined sending manner is delayed sending or delayed and scheduled sending, the UE does not need to be immediately paged, thereby reducing signaling overheads for paging, and reducing signaling overheads of an air interface. 
     The first network device is a network device that performs a control plane function in a communications network. The second network device is a network device that performs a policy function in the communications network. The first information may be any type of information sent, synchronized, or notified by the network side to the UE. The first network device or the second network device may be separately disposed, or may be deployed in an existing network device as a functional unit. 
     With reference to the first aspect, in a possible implementation, the sending manner related information of the first information may include: sending manner indication information, where the sending manner indication information is used to indicate a sending manner that can be used by the first information when the UE is in the idle mode; or a sending policy, where the sending policy is used to determine a sending manner that can be used by the first information when the UE is in the idle mode. 
     The sending manner indication information is information in a one-to-one correspondence with the sending manner, and the sending manner of the first information can be directly and quickly determined based on the sending manner indication information. The sending policy is a preset rule, and the sending manner of the first information can be specifically determined based on the sending policy. 
     The sending policy may be statically preset by an operator of a communications device, or may be dynamically set by a network device based on a network status; or the sending policy may be statically preset by an operator of a communications device, and dynamically activated by a network device based on a network status. 
     With reference to the first aspect, in another possible implementation, when the sending manner related information of the first information is the sending manner indication information, the determining a sending manner of the first information based on sending manner related information of the first information may include: determining that the sending manner of the first information is the sending manner indicated by the sending manner indication information. 
     Corresponding to a type of the sending manner, the sending manner indication information may include indication information of immediate sending, indication information of delayed sending, or indication information of delayed and scheduled sending. 
     Further, when the sending manner indication information is the indication information of delayed and scheduled sending, the sending manner indication information includes an identifier of delayed and scheduled sending and a preset time point; or the sending manner indication information includes an indication of delayed sending and a preset time, or the sending manner indication information includes a preset time. 
     With reference to any one of the first aspect or the foregoing possible implementations, in another possible implementation, when the sending manner related information of the first information is the sending policy, the determining a sending manner of the first information based on sending manner related information of the first information may include: determining the sending manner of the first information based on the sending policy. 
     With reference to any one of the first aspect or the foregoing possible implementations, in another possible implementation, to save storage resources of the first network device, the sending manner related information of the first information may be provided by the second network device to the first network device. Correspondingly, before the determining a sending manner of the first information based on sending manner related information of the first information, the method may further include: receiving the sending manner related information of the first information sent by the second network device. 
     The sending manner related information of the first information and the first information may be included in one message, or may be separately sent. 
     With reference to any one of the first aspect or the foregoing possible implementations, in another possible implementation, to reduce signaling overheads between network devices, the sending manner related information of the first information may be preconfigured in the first network device. When receiving the first information, the first network device determines the sending manner of the first information based on the preconfigured sending manner related information of the first information. 
     With reference to any one of the first aspect or the foregoing possible implementations, in another possible implementation, to improve completeness of the solution, the method may further include: sending the first information to the UE based on the sending manner of the first information. Therefore, in a process of sending the first information to the UE, the signaling overheads of the air interface are reduced. 
     With reference to any one of the first aspect or the foregoing possible implementations, in another possible implementation, to send the first information to the UE in different sending manners, a specific implementation of the sending the first information to the UE based on the sending manner of the first information is: if the sending manner of the first information is delayed sending, sending the first information to the UE when the UE enters a connected mode; or if the sending manner of the first information is delayed and scheduled sending, sending the first information to the UE when the UE enters a connected mode or a preset time point of the first information is reached. 
     With reference to any one of the first aspect or the foregoing possible implementations, in another possible implementation, a solution of sending the first information to the UE when the UE enters the connected mode is provided. When the UE sends a location update request, it can be determined that the UE enters the connected mode. The sending the first information to the UE when the UE enters a connected mode specifically includes: receiving a location update request sent by the UE and carrying object information of the UE; and sending the first information to the UE based on the object information of the UE. 
     With reference to any one of the first aspect or the foregoing possible implementations, in another possible implementation, a specific implementation of the sending the first information to the UE based on the object information of the UE may be: determining, based on the object information of the UE, whether an object to which the first information belongs is in an active state or is a newly created object; and sending a second notification request to the UE if it is determined that the object to which the first information belongs is in the active state or is a newly created object. 
     The object information of the UE includes a current attribute of each object of the UE. Because some objects may be deleted by the UE, states of these objects are an inactive state. A current status of the object to which the first information belongs can be determined by searching the object information of the UE. If the object information of the UE does not include the object to which the first information belongs, the object to which the first information belongs is a newly created object. 
     Further, if it is determined that the object to which the first information belongs is in the inactive state and is not a newly created object, the first information is not sent to the UE, thereby better reducing the signaling overheads of the air interface. 
     With reference to any one of the first aspect or the foregoing possible implementations, in another possible implementation, in a scenario in which the UE enters the connected mode by sending the location update request, to be compatible with a network configuration, a specific implementation of the sending the first information to the UE may be: sending a location update response message to the UE, where the location update response message includes the first information; or sending, to an access network device, a context setup message including the first information, so that the access network device sends, to the UE, a Radio Resource Control (RRC) reconfiguration message including the first information; and further, sending a location update response message to the UE. 
     With reference to any one of the first aspect or the foregoing possible implementations, in another possible implementation, another solution of sending the first information to the UE when the UE enters a connected mode is provided. When the UE sends a service request, it can be determined that the UE enters the connected mode. A specific implementation of the sending the first information to the UE when the UE enters a connected mode may be: receiving a service request sent by the UE and carrying object information of the UE; and sending the first information to the UE based on the object information. 
     Specifically, in a scenario in which the UE sends the service request, if it is determined, based on the object information of the UE, that an object to which the first information belongs is in an active state or is a newly created object, a specific implementation of the sending the first information to the UE when the service request is received is: sending, to an access network device, a context setup message including the first information, so that the access network device sends, to the UE, an RRC reconfiguration message including the first information. 
     Optionally, that the UE sends the service request may be that the UE sends the service request according to a user indication, or may be that the UE sends the service request after receiving a paging message. 
     With reference to any one of the first aspect or the foregoing possible implementations, in another possible implementation, to more accurately process the information about the UE, the method may further include: if the sending manner of the first information is delayed sending or delayed and scheduled sending, setting the first information to a wait state, where the wait state is used to indicate that the first information is to be sent. 
     An implementation of the setting the first information to a wait state may be: setting an identifier to record the wait state; may be: storing the first information into a buffer to record the wait state; or may be: storing the first information and marking the first information as the wait state. 
     Optionally, an implementation of the setting the first information to a wait state may be: setting the object to which the first information belongs to the wait state. 
     With reference to any one of the first aspect or the foregoing possible implementations, in another possible implementation, if the sending manner of the first information is delayed sending or delayed and scheduled sending and the first information is set to the wait state, the method may further include: if the sending manner of the first information is delayed sending or delayed and scheduled sending and the first information is in the wait state, sending the first information to the UE when the UE enters the connected mode; or if the sending manner of the first information is delayed and scheduled sending and the first information is in the wait state, sending the first information to the UE when the preset time point of the first information is reached. 
     With reference to any one of the first aspect or the foregoing possible implementations, in another possible implementation, a specific implementation of the receiving, by the first network device, first information of the UE sent by a second network device may be: receiving, by the first network device, a first message sent by the second network device, where the first message carries the first information and the sending manner related information of the first information. On this basis, to more accurately process the information about the UE, the method may further include: if the sending manner of the first information is delayed sending or delayed and scheduled sending, setting the first message to a wait state. 
     With reference to any one of the first aspect or the foregoing possible implementations, in another possible implementation, if the sending manner of the first information is delayed sending or delayed and scheduled sending and the first message is set to the wait state, the method may further include: if the sending manner of the first information is delayed sending or delayed and scheduled sending and the first message is in the wait state, processing the first message when the UE enters the connected mode; or if the sending manner of the first information is delayed and scheduled sending and the first message is in the wait state, processing the first message when the preset time point of the first message is reached. 
     With reference to any one of the first aspect or the foregoing possible implementations, in another possible implementation, to correspond to the setting of the wait state, and avoid incorrect processing, after the sending the first information to the UE, the method further includes: canceling the wait state of the first information. 
     If the implementation of the setting the first information to a wait state is setting an identifier to record the wait state, the canceling the wait state of the first information is canceling the specified identifier or setting the first information to a processed state. If the implementation of the setting the first information to a wait state is storing the first information into a buffer to record the wait state, the canceling the wait state of the first information is deleting the first information from the buffer after the first information is sent to the UE. If the implementation of the setting the first information to a wait state is storing the first information and setting the first information to the wait state, the canceling the wait state of the first information is deleting the first information and the wait state from a buffer after the first information is sent to the UE. 
     With reference to any one of the first aspect or the foregoing possible implementations, in another possible implementation, to ensure the completeness of the solution, and ensure interworking between networks and ensure that the second network device learns a current processing status of the first information of the UE, after the receiving first information sent by a second network device, the method may further include: sending a sending indication of the first information to the second network device, where the sending indication of the first information is used to indicate a sending status of the first information that is determined by the first network device. 
     The sending status includes a sent state or a not-sent state. 
     With reference to any one of the first aspect or the foregoing possible implementations, in a possible implementation, the solution in this application is applied to a session management procedure, to effectively reduce signaling overheads for paging the UE in the session management procedure, and reduce the signaling overheads of the air interface. The first information may include information synchronized or updated to the UE in the session management procedure. 
     The information synchronized or updated to the UE in the session management procedure includes information updated to the UE after a session parameter is modified, created, or deleted, or includes information updated to the UE after a bearer in a session is modified, set up, or deleted. 
     With reference to any one of the first aspect or the foregoing possible implementations, in a possible implementation, the first information may be included in a first notification request, and an implementation of the sending the first information to the UE may be: sending, to the UE, a second notification request message including the first information. 
     With reference to any one of the first aspect or the foregoing possible implementations, in a possible implementation, in the session management procedure, the first notification request message may be a session modification request, a bearer modification request, a bearer deletion request, or a bearer setup request, and the second notification request message may be a session management request or a bearer setup request. 
     With reference to any one of the first aspect or the foregoing possible implementations, in another possible implementation, in an actual network, the first network device continually receives the information about the UE sent by the second network device. If previous information of the UE is not processed and new information of the UE is received, when the UE enters the connected mode, a plurality of pieces of information of the same UE may be combined and then sent, provided that the UE obtains newest complete information. Specifically, before the sending the first information to the UE, the method further includes: receiving second information sent by the second network device, where if the first information and the second information belong to a same object, the first information to be sent is deleted, and only the second information needs to be sent; and a specific sending manner is a sending manner of the second information. If the first information and the second information belong to different objects, the sending manners of the first information and the second information are as follows: If the sending manners of the first information and the second information are both delayed sending, the sending manners are delayed sending; if the sending manners of the first information and the second information include delayed sending and delayed and scheduled sending, the sending manners are delayed and scheduled sending; or if the sending manners of the first information and the second information are both delayed and scheduled sending, the sending manners are delayed and scheduled sending, and processing is performed based on a time point that is first reached. 
     The combination means that if the plurality of pieces of information belong to a same object, previous information is replaced with newest information; or if the plurality of pieces of information belong to different objects, the plurality of pieces of information are all processed. 
     With reference to any one of the first aspect or the foregoing possible implementations, in another possible implementation, to ensure the completeness of the solution, after the sending the first information to the UE, the method may further include: receiving a response message of the first information that is sent by the UE. 
     With reference to any one of the first aspect or the foregoing possible implementations, in another possible implementation, to ensure interworking between networks and ensure that the second network device learns a current processing status of the information sent to the UE, after the receiving a response message of the first information that is sent by the UE, the method may further include: sending, by the first network device, a complete indication message of the first information to the second network device, to notify the second network device that the first information is already successfully sent to the UE. 
     With reference to any one of the first aspect or the foregoing possible implementations, in another possible implementation, to ensure interworking between networks and ensure that the second network device learns a current processing status of the information sent to the UE, after the receiving first information sent by a second network device, the method further includes: if the first information fails to be sent to the UE, sending a failure indication to the second network device. 
     That the first information fails to be sent to the UE may be defined according to an actual requirement. For example, within preset duration after the first information is sent to the UE, if a response message of the first information that is sent by the UE is not received, it is determined that the first information fails to be sent to the UE. A length of the preset duration may be set according to an actual requirement. 
     With reference to any one of the first aspect or the foregoing possible implementations, in another possible implementation, to ensure the completeness of the solution, after the receiving, by the first network device, first information sent by a second network device, the method further includes: notifying a user plane network device of the first information. In this way, information synchronization is implemented for a control plane, a user plane, and the UE. 
     A second aspect of this application provides another method for processing information, where the information is information about UE in an idle mode. The method is applied to a first network device, and the method may include: receiving first information of the UE and sending manner indication information of the first information that are sent by a second network device; and if the sending manner indication information indicates that send the first information in a delayed sending manner or a delayed and scheduled sending manner, setting the first information to a wait state, where the wait state is used to indicate that the first information is to be sent. 
     According to the method for processing information provided in this application, when the UE is in the idle mode and the second network device sends the first information of the UE to the first network device, the sending manner indication information of the first information is also provided. If the sending manner indication information indicates that send the first information in the delayed sending manner or the delayed and scheduled sending manner, the first network device sets the first information to the wait state, without initiating a paging procedure to wake up the UE in the idle mode to receive the first information, thereby reducing signaling overheads of an air interface. 
     With reference to the second aspect, in a possible implementation, the method may further include: sending the first information to the UE when the UE enters a connected mode and the first information is in the wait state. 
     With reference to either the second aspect or the foregoing possible implementation, in a possible implementation, the method further includes: sending the first information to the UE when a preset time point of the first information is reached and the first information is in the wait state. 
     Further, a process of sending the first information to the UE is similar to that according to the first aspect and the possible implementations of the first aspect, and details are not described herein again. 
     Athird aspect of this application provides a method for processing a message, where the message includes information about UE in an idle mode. The method is applied to a first network device, and the method specifically includes: receiving, by the first network device, a first message sent by a second network device, where the first message includes first information of the UE; and determining, by the first network device, that a processing manner of the first message is delayed processing or delayed and scheduled processing, and storing the first message, or storing a second message generated based on the first message. 
     According to the method for processing a message provided in this application, when receiving the first message sent by the second network device and including the information about the UE in the idle mode, the first network device determines whether to immediately process the first message. When it is determined that the processing manner of the first message is delayed processing or delayed and scheduled processing, the UE in the idle mode does not need to be immediately paged and waken up to process the first message, thereby reducing signaling overheads of an air interface. 
     The second message may be a message when the first information according to any one of the aspects or the possible implementations is sent to the UE. 
     With reference to the third aspect, in a possible implementation, a plurality of solutions of determining that the processing manner of the first message is delayed processing or delayed and scheduled processing are provided, and specifically include: determining, based on processing manner indication information, that the processing manner of the first message is delayed processing or delayed and scheduled processing; or determining, based on a processing policy, that the processing manner of the first message is delayed processing or delayed and scheduled processing. 
     With reference to either the third aspect or the foregoing possible implementation, in a possible implementation, to save storage resources of the first network device, the first message includes the processing manner indication information or the processing policy. The processing manner indication information is used to indicate immediate processing or delayed processing or delayed and scheduled processing. 
     With reference to any one of the third aspect or the foregoing possible implementations, in a possible implementation, before the receiving a first message sent by a second network device, the method may further include: receiving the processing policy sent by the second network device, where the processing policy is used to determine a processing manner of the first message. 
     With reference to any one of the third aspect or the foregoing possible implementations, in a possible implementation, the method may further include: if the processing manner of the first message is delayed processing, processing the first message or the second message when the UE enters a connected mode; or if the processing manner of the first message is delayed and scheduled processing, processing the first message or the second message when the UE enters a connected mode or a preset time point of the first message is reached. 
     With reference to any one of the third aspect or the foregoing possible implementations, in a possible implementation, the method may further include: if the processing manner of the first message is delayed processing or delayed and scheduled processing, setting the first message to a wait state or the second message to a wait state, where the wait state is used to indicate that the first message or the second message is to be processed. 
     With reference to any one of the third aspect or the foregoing possible implementations, in a possible implementation, after the setting the first message or the second message to a wait state, the method may further include: if the processing manner of the first message is delayed processing or delayed and scheduled processing, processing, when the UE enters the connected mode, the first message or the second message in the wait state; or if the processing manner of the first message is delayed and scheduled processing, processing, when the preset time point of the first information is reached, the first message or the second message in the wait state. 
     With reference to any one of the third aspect or the foregoing possible implementations, in a possible implementation, the first message may be a session modification request, a bearer modification request, a bearer setup request, or a bearer deletion request in a session management procedure, and the first message includes information synchronized or updated to the UE in the session management procedure. The second message may be a session management request or a bearer setup request sent to the UE in the session management procedure, and the session management request or the bearer setup request includes the information synchronized or updated to the UE in the session management procedure. 
     It should be noted that, a processing procedure of the first message according to the third aspect is similar to a sending procedure of the first information according to the first aspect. An operation on the first information according to the first aspect may be directly applied to the third aspect, as an operation on the first message. A specific process is not described in detail herein again. 
     A fourth aspect of this application provides another method for processing information. The method is applied to a second network device, and the method includes: obtaining, by the second network device, sending manner related information of first information of UE, where the sending manner related information is used to determine a sending manner of the first information, and the sending manner includes immediate sending, delayed sending, or delayed and scheduled sending; and sending the first information and the sending manner related information of the first information to a first network device. 
     According to the method for processing information provided in this application, the second network device first obtains the sending manner related information of the first information of the UE, and then, sends the sending manner related information of the first information while sending the first information to the first network device. The first network device may determine the sending manner of the first information based on the sending manner related information of the first information. When the determined sending manner is delayed sending or delayed and scheduled sending, a paging procedure does not need to be initiated to wake up the UE in an idle mode to receive the first information, thereby reducing signaling overheads for paging the UE, and reducing signaling overheads of an air interface. 
     With reference to the fourth aspect, in a possible implementation, to improve processing efficiency of the first network device, and implement centralized control, after determining the sending manner of the first information of the UE, the second network device provides sending manner indication information to the first network device, where the sending manner related information of the first information may include the sending manner indication information, and the sending manner indication information is used to indicate a sending manner of the first information. 
     With reference to either the fourth aspect or the foregoing possible implementation, in a possible implementation, to improve processing efficiency of the second network device, the second network device needs to provide only a sending policy to the first network device, where the sending manner related information of the first information may include the sending policy, and the sending policy is used to determine a sending manner of the first information. 
     With reference to any one of the fourth aspect or the foregoing possible implementations, in a possible implementation, if the sending manner related information of the first information includes the sending manner indication information, a specific implementation of the obtaining sending manner related information of first information is: determining the sending manner indication information of the first information based on the sending policy. 
     With reference to any one of the fourth aspect or the foregoing possible implementations, in a possible implementation, the solution in this application is applied to a session management procedure, to effectively reduce signaling overheads of the UE in the session management procedure, and reduce the signaling overheads of the air interface. The first information may include information synchronized or updated to the UE in the session management procedure. 
     The information synchronized or updated to the UE in the session management procedure includes information updated to the UE after a session parameter is modified, created, or deleted, or includes information updated to the UE after a bearer in a session is modified, set up, or deleted. 
     With reference to any one of the fourth aspect or the foregoing possible implementations, in another possible implementation, to ensure interworking between networks and ensure that the second network device learns a current processing status of the first information of the UE, after the sending first information to a first network device, the method further includes: receiving a sending indication of the first information that is sent by the first network device, where the sending indication of the first information is used to indicate a sending status of the first information. 
     With reference to any one of the fourth aspect or the foregoing possible implementations, in another possible implementation, to ensure interworking between networks and ensure that the second network device learns a current processing status of the first information of the UE, the method further includes: receiving a complete indication message of the first information that is sent by the first network device after the first network device receives a response message of the first information that is sent by the UE. 
     With reference to any one of the fourth aspect or the foregoing possible implementations, in another possible implementation, to ensure interworking between networks and ensure that the second network device learns a current processing status of the first information of the UE, the method further includes: receiving a sending failure indication that is sent by the first network device after the first network device fails to send the first information to the UE. 
     A fifth aspect of this application provides another method for processing information. The method is applied to a second network device, and the method may include: obtaining, by the second network device, sending manner indication information of first information of UE, where the sending manner indication information is used to indicate a sending manner of the first information, and the sending manner includes immediate sending, delayed sending, or delayed and scheduled sending; and sending the first information and the sending manner indication information of the first information to the first network device. 
     The method for processing information according to the fifth aspect of this application is performed with reference to the method for processing information according to the second aspect. Therefore, for a specific implementation, refer to the second aspect, and a same beneficial effect that can be achieved as the second aspect is not described in detail herein again. 
     A sixth aspect of this application provides a method for processing a message, where the message includes information about UE in an idle mode. The method is applied to a second network device, and the method includes: obtaining, by the second network device, processing manner related information of a first message, where the first message includes first information of the UE in the idle mode, and the processing manner related information is used to determine a processing manner of the first message; and sending the first message and the processing manner related information of the first message to a first network device. 
     The method for processing a message according to the sixth aspect of this application is performed with reference to the method for processing a message according to the third aspect. Therefore, for a specific implementation, refer to the third aspect, and a same beneficial effect that can be achieved as the third aspect is not described in detail herein again. 
     A seventh aspect of this application provides a first network device. The device can implement a function of the first network device in the foregoing methods, and the function of the device may be implemented by hardware or may be implemented by executing corresponding software by hardware. The hardware or the software includes one or more modules corresponding to the foregoing function. 
     With reference to the seventh aspect, in a possible implementation, a structure of the device includes a processor and a transceiver. The processor is configured to support the device in performing the foregoing methods. The transceiver is configured to support communication between the device and another network element. The device may further include a memory. The memory is configured to couple to the processor, and stores a necessary program instruction and necessary data for the device. 
     An eighth aspect of this application provides a computer storage medium. The computer storage medium is configured to store a computer software instruction used by the foregoing first network device, and includes a program designed to perform the foregoing aspects. 
     A ninth aspect of this application provides a second network device. The device can implement a function of the second network device in the foregoing methods, and the function of the device may be implemented by hardware or may be implemented by executing corresponding software by hardware. The hardware or the software includes one or more modules corresponding to the foregoing function. 
     With reference to the ninth aspect, in a possible implementation, a structure of the device includes a processor and a transceiver. The processor is configured to support the device in performing the foregoing methods. The transceiver is configured to support communication between the device and another network element. The device may further include a memory. The memory is configured to couple to the processor, and stores a necessary program instruction and necessary data for the device. 
     A tenth aspect of this application provides a computer storage medium. The computer storage medium is configured to store a computer software instruction used by the foregoing second network device, and includes a program designed to perform the foregoing aspects. 
     The solution according to any one of the seventh aspect to the tenth aspect or the possible implementations is used to implement the methods according to the first aspect to the sixth aspect. Therefore, same beneficial effects that can be implemented as the first aspect to the sixth aspect are not described in detail herein again. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       To describe the technical solutions in the embodiments of the present application more clearly, the following briefly describes the accompanying drawings required for describing the embodiments. Apparently, the accompanying drawings in the following description show merely some embodiments of the present application, and persons of ordinary skill in the art may still derive other drawings from these accompanying drawings without creative efforts. 
         FIG. 1  is a schematic architectural diagram of a communications network according to an embodiment of the present application; 
         FIG. 2  is a schematic architectural diagram of an EPS network according to an embodiment of the present application; 
         FIG. 3  is a schematic architectural diagram of a 5G network according to an embodiment of the present application; 
         FIG. 4  is a schematic structural diagram of a first network device according to an embodiment of the present application; 
         FIG. 5  is a schematic structural diagram of a second network device according to an embodiment of the present application; 
         FIG. 6  is a schematic flowchart of a method for processing information according to an embodiment of the present application; 
         FIG. 7  is a schematic flowchart of another method for processing information according to an embodiment of the present application; 
         FIG. 8  is a schematic flowchart of still another method for processing information according to an embodiment of the present application; 
         FIG. 9  is a schematic flowchart of a method for processing a message according to an embodiment of the present application; 
         FIG. 10  is a schematic flowchart of another method for processing information according to an embodiment of the present application; 
         FIG. 11  is a schematic flowchart of still another method for processing information according to an embodiment of the present application; 
         FIG. 12  is a schematic flowchart of yet another method for processing information according to an embodiment of the present application; 
         FIG. 12 a    is a schematic flowchart of yet another method for processing information according to an embodiment of the present application; 
         FIG. 13  is a schematic flowchart of another method for processing a message according to an embodiment of the present application; 
         FIG. 14  is a schematic flowchart of still another method for processing a message according to an embodiment of the present application; 
         FIG. 15  is a schematic structural diagram of another first network device according to an embodiment of the present application; 
         FIG. 16  is a schematic structural diagram of still another first network device according to an embodiment of the present application; 
         FIG. 17  is a schematic structural diagram of yet another first network device according to an embodiment of the present application; 
         FIG. 18  is a schematic structural diagram of another first network device according to an embodiment of the present application; 
         FIG. 19  is a schematic structural diagram of another first network device according to an embodiment of the present application; 
         FIG. 20  is a schematic structural diagram of another first network device according to an embodiment of the present application; 
         FIG. 21  is a schematic structural diagram of another first network device according to an embodiment of the present application; 
         FIG. 22  is a schematic structural diagram of another second network device according to an embodiment of the present application; and 
         FIG. 23  is a schematic structural diagram of still another second network device according to an embodiment of the present application. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     The following clearly describes the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are merely some but not all of the embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application. 
     In addition, the terms “system” and “network” may often be used interchangeably in this specification. The term “and/or” in this specification describes only an association relationship for describing associated objects and represents that three relationships may exist. For example, A and/or B may represent the following three cases: Only A exists, both A and B exist, and only B exists. In addition, the character “/” in this specification generally indicates an “or” relationship between the associated objects. 
     Currently, when a control plane network device in a communications network receives information about UE or a message of UE, if the UE is in an idle mode, a paging message is sent to the UE, to wake up the UE to enter a connected mode, to send the information about the UE to the UE or process a message including the information about the UE. This process causes UE to generate additional signaling overheads, and signaling overheads of an air interface are wasted. 
     A basic principle of the present application is as follows: When information about UE or a message including information about UE is received, a sending manner of the information about the UE or a processing manner of the message including the information about the UE is determined first, where the sending manner includes immediate sending, delayed sending, or delayed and scheduled sending, and the processing manner includes immediate processing or delayed processing or delayed and scheduled processing; and the information is sent to the UE based on the determined sending manner, or the message is processed based on the determined processing manner. Therefore, when information that does not need to be immediately sent or a message that does not need to be immediately processed is received, UE in an idle mode does not need to be paged, thereby reducing signaling overheads for paging the UE, and reducing signaling overheads of an air interface. 
     A method for processing information or a message provided in an embodiment of the present application is applied to a communications network architecture shown in  FIG. 1  or an evolved packet system (EPS) network architecture shown in  FIG. 2 . 
     The communications network architecture shown in  FIG. 1  includes a policy function network device  101 , at least one control plane network device  102 , and at least one UE  103 . 
     In the communications network architecture shown in  FIG. 1 , the policy function network device  101  is connected to the at least one control plane network device  102  to perform communication, and one control plane network device  102  serves a plurality of UEs  103 . 
     It should be noted that, quantities of policy function network devices  101 , control plane network devices  102 , and UEs  103  that are included in the communications network architecture may be determined according to an actual requirement. This is not specifically limited in this embodiment of the present application.  FIG. 1  merely describes the constitution of the communications network architecture by using an example, and is not intended to specifically limit the quantities of policy function network devices  101 , control plane network devices  102 , and UEs  103  that are included in the communications network architecture. 
     The EPS network architecture shown in  FIG. 2  includes a packet data gateway (P-GW) and a mobility management entity (MME). The P-GW obtains a policy from a policy and charging rules function (PCRF), and the P-GW communicates with the MME by using a serving gateway (S-GW). 
     Optionally, the communications network architecture shown in  FIG. 1  may be a network architecture of a fifth generation (5G) mobile communications technology network.  FIG. 3  schematically shows a network architecture of a 5G network. In the network architecture of the 5G network shown in  FIG. 3 , a policy function (PF) entity is a policy function network device, and a control plane (CP) functional unit set is a control plane network device. 
     The CP functional unit set may be at least one CP entity. When the CP functional unit set includes at least two CP entities, and the at least two CP entities interact to implement a function of a first network device in this embodiment of the present application. 
     For example, the CP functional unit set may include a mobility management (MM) function and a session management (SM) function. 
     Certainly, the method for processing information or a message provided in this embodiment of the present application is applicable to various communications network architectures. Therefore, the communications network architecture shown in  FIG. 1  may also be another communications network architecture, and a type of the communications network architecture shown in  FIG. 1  is not specifically limited in this embodiment of the present application. 
     Optionally, the UE  103  may be a terminal device such as a mobile phone, a tablet computer, a notebook computer, a personal computer (PC), an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), or an in-vehicle device. 
     The method for processing information or a message provided in this embodiment of the present application is specifically applied to a first network device  40  or a second network device  50 . The first network device  40  may be the policy function network device  101  in the communications network architecture shown in  FIG. 1 , and the second network device  50  may be the control plane network device  102 . 
     Specifically,  FIG. 4  is a schematic structural diagram of the first network device  40  related to various embodiments of the present application. The first network device  40  performs a control and management function. 
     As shown in  FIG. 4 , the first network device  40  may include a processor  401 , a memory  402 , a communications bus  403 , and a transceiver  404 . 
     The memory  402  is configured to store program code, so that the processor  401  executes the program code to implement various functions of the first network device  40 . The memory  402  may be a volatile memory such as a random access memory (RAM); or a non-volatile memory such as a read-only memory (ROM), a flash memory, a hard disk drive (HDD), or a solid-state drive (SSD); or a combination of the foregoing types of memories. 
     The processor  401  is a control center of the first network device  40 , and may be a central processing unit (CPU), or may be an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application, for example, one or more microprocessors (DSP) or one or more field programmable gate arrays (FPGA). The processor  401  may run or execute the program code stored in the memory  402 , and invoke data stored in the memory  402 , to implement various functions of the first network device  40 . 
     The communications bus  403  may be an industry standard architecture (ISA) bus, a peripheral component interconnect (PCI) bus, an extended industry standard architecture (EISA) bus, or the like. The bus  403  may be classified into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is used to represent the bus in  FIG. 4 , but this does not mean that there is only one bus or only one type of bus. 
     The first network device  40  may communicate with another network device by using the transceiver  404 . The transceiver  404  may be a transceiver port, namely, a communications interface. 
     Specifically,  FIG. 5  is a schematic structural diagram of the second network device  50  related to various embodiments of the present application. The second network device  50  performs a policy function. 
     As shown in  FIG. 5 , the second network device  50  may include a processor  501 , a memory  502 , a communications bus  503 , and a transceiver  504 . 
     The memory  502  is configured to store program code, so that the processor  501  executes the program code to implement various functions of the second network device  50 . The memory  502  may be a volatile memory such as a RAM; or a non-volatile memory such as a ROM, a flash memory, an HDD, or an SSD; or a combination of the foregoing types of memories. 
     The processor  501  is a control center of the second network device  50 , and may be a CPU, or may be an ASIC, or one or more integrated circuits configured to implement the embodiments of the present application, for example, one or more DSPs or one or more FPGAs. The processor  501  may run or execute the program code stored in the memory  502 , and invoke data stored in the memory  502 , to implement various functions of the second network device  50 . 
     The communications bus  503  may be an ISA bus, a PCI bus, an EISA bus, or the like. The bus  503  may be classified into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is used to represent the bus in  FIG. 5 , but this does not mean that there is only one bus or only one type of bus. 
     The second network device  50  may communicate with another network device by using the transceiver  504 . The transceiver  504  may be a transceiver port. 
     The embodiments of the present application are described in detail below with reference to the accompanying drawings. 
     Before the specific solutions in the embodiments of the present application are described, concepts of sending manners related to the embodiments of the present application are explained first. 
     Immediate sending means that when information about UE is received, if the UE is in a connected mode, the information is directly sent to the UE; or if the UE is an idle mode, the UE is paged, and the information is sent after the UE enters a connected mode. 
     Delayed sending means that when information about UE is received, if the UE is in a connected mode, the information is directly sent; or if the UE is an idle mode, the information is sent after the UE enters a connected mode. 
     Delayed and scheduled sending means that when information about UE is received, if the UE is in a connected mode, the information is directly sent; or if the UE is in an idle mode, and the UE enters a connected mode before a predetermined time point, the information is sent after the UE enters the connected mode; or if the UE is in an idle mode, and the UE does not enter a connected mode after a predetermined time point, the UE is paged, and the information is sent after the UE enters the connected mode. 
     Immediate processing means that when a message including information about UE is received, if the UE is in a connected mode, the message is directly processed; or if the UE is in an idle mode, the UE is paged, and the message is processed after the UE enters a connected mode. 
     Delayed processing means that when a message including information about UE is received, if the UE is in a connected mode, the message is directly processed; or if the UE is in an idle mode, the message is processed after the UE enters a connected mode. 
     Delayed and scheduled processing means that when a message including information about UE is received, if the UE is in a connected mode, the message is directly processed; or if the UE is in an idle mode, and the UE enters a connected mode before a predetermined time point, the message is processed after the UE enters the connected mode; or if the UE is in an idle mode, and the UE does not enter a connected mode after a predetermined time point, the UE is paged, and the message is processed is performed after the UE enters the connected mode. 
     It should be noted that, the processing mentioned above may include sending, conversion, or an update of a message or information. 
     According to an aspect, an embodiment of the present application provides a method for processing information. The method is applied to the communications network architecture shown in  FIG. 1  or the EPS network architecture shown in  FIG. 2 . In this embodiment, a process of interaction between a first network device and a second network device is used as an example to describe the method for processing information provided in this embodiment of the present application. 
     As shown in  FIG. 6 , the method may include the following steps. 
     S 601 : The second network device sends first information of UE to the first network device. 
     It should be noted that, the first information of the UE may be any type of information. This is not specifically limited in this embodiment of the present application. 
     For example, the first information of the UE may be information synchronized or updated to the UE in a session management procedure, for example, bearer context information. To be specific, when a network side initiates an update of session information or an update of bearer information, the UE needs to be notified of the updated information. Alternatively, the first information may be an update of subscription information of the UE or an update of related information of the UE initiated by a home subscriber server (HSS) or an update of information about the UE initiated by another network side device. Certainly, a type and a form of the first information of the UE are not specifically limited in this embodiment of the present application. 
     The information synchronized or updated to the UE in the session management procedure includes information, synchronized to the UE, about a modified, created, or deleted session parameter after the session parameter is modified, created, or deleted, so that a newest session parameter is synchronized to the UE; or attribute information, synchronized to the UE, of a modified or set up or deleted bearer after the bearer in a session is modified or set up or deleted. 
     Specifically, the information synchronized or updated to the UE in the session management procedure specifically includes: a modification of a bearer quality of service (QoS) parameter or a per APN aggregate maximum bit rate (APN-AMBR) or a bearer traffic flow template (TFT) information or a notification protocol configuration option (PCO) or the like. 
     Parameter information may be parameter content, or may be an information value corresponding to parameter content. A correspondence between parameter content and an information value may be set according to an actual requirement. This is not specifically limited in this embodiment of the present application. 
     For example, bearer attribute information may include a quality of service (QoS) parameter. The QoS parameter may include a QoS class identifier (QCI), the Address Resolution Protocol (ARP), a guaranteed bit rate (GBR), and a multiple frequency band indicator (MBR). 
     Optionally, when sending the first information of the UE to the first network device in S 601 , the second network device may further send sending manner related information of the first information to the first network device. In other words, the first information and the sending manner related information of the first information may be sent to the first network device by using a first message. 
     The sending manner related information of the first information may include sending manner indication information or a sending policy. 
     The sending manner indication information is used to indicate a sending manner of the first information. The sending policy is used to determine a sending manner of the first information of the UE. The sending manner includes immediate sending, delayed sending, or delayed and scheduled sending. 
     Optionally, the sending policy may include different sending manners corresponding to different types of services; or different sending manners corresponding to modifications of different types of objects, where for example, an immediate sending manner is used for a modification of a guaranteed bit rate bearer, and delayed sending is used for a modification or a setup of a non-guaranteed bit rate bearer; and the method may further include activating of the delayed sending feature when a network side is congested. Specific content of the sending policy is not limited in this embodiment of the present application, and the content of the sending policy may be defined according to an actual requirement. 
     Optionally, the sending policy may include: for a service with a specific execution moment, related information of the service is sent to the UE in a delayed and scheduled sending manner. The sending policy may further include a time point or a time length at which/during which the related information of the service is sent to the UE. For example, the time point at which the related information of the service is sent to the UE is determined based on the specific execution moment of the service. 
     For example, in the session management procedure, the sending policy may be different sending manners corresponding to different subscription information or different information attributes. The sending manner can be determined based on information about the UE or a subscription level of the UE. 
     It should be noted that, if the second network device sends the first information of the UE and the sending manner related information of the first information to the first network device, the first information and the sending manner related information of the first information may be included in one message for sending, or may be carried in different messages for sending. This is not specifically limited in this embodiment of the present application. 
     Correspondingly, if the second network device further sends the sending manner related information of the first information to the first network device when sending the first information of the UE to the first network device in S 601 , before S 601 , the method further includes: obtaining, by the second network device, the sending manner related information of the first information of the UE. 
     Optionally, there are a plurality of implementations of obtaining the sending policy by the second network device, and the plurality of implementations specifically include, but are not limited to, the following: 
     Manner 1: A sending policy preconfigured by an operator is received. 
     In Manner 1, the operator may configure the sending policy on the second network device. 
     Manner 2: A sending policy is determined based on a current network condition. 
     In Manner 2, the second network device may determine the sending policy based on an actual network status. 
     For example, the sending policy may include: in a busy network, a delayed sending manner or a delayed and scheduled sending manner is used to send information whose survival time needs to be less than a first threshold; and an immediate sending manner is used to send information whose survival time needs to be greater than the first threshold; or in an idle network, all information is immediately sent. 
     It should be noted that, the foregoing example is merely an example for describing the sending policy, and is not intended to limit the specific content of the sending policy. 
     Manner 3: A sending policy configured by an operator is received, and the sending policy is dynamically adjusted based on a current network condition. 
     Further, the obtaining, by the second network device, the sending manner indication information of the first information includes: determining the sending manner of the first information based on the sending policy, and generating the sending manner indication information of the first information. 
     The sending manner indication information may include indication information of immediate sending, indication information of delayed sending, or indication information of delayed and scheduled sending. 
     It should be noted that, a representation form of the sending manner indication information may be set according to an actual requirement. This is not specifically limited in this embodiment of the present application. 
     For example, different sending manner indication information may be represented by using different characters, or different sending manners may be represented by determining whether the sending manner indication information is empty. 
     For example, a sending manner indication information flag bit is set. If the flag bit is set to 1, it indicates immediate sending; if the flag bit is set to 2, it indicates delayed sending; or if the flag bit is set to 3, it indicates delayed and scheduled sending. 
     For another manner, immediate sending may be implemented by using a synchronization indication (synchronization indication), and delayed sending or delayed and scheduled sending may be implemented by using an asynchronization indication. Based on the asynchronization indication, delayed and scheduled sending may further be determined by determining whether the second network device delivers time indication information. For example, if the second network device delivers the time indication information, it indicates that the delayed and scheduled sending manner is used. 
     Apparently, the synchronization indication and the asynchronization indication each may be implemented by using one bit. This is not limited. 
     Further, when the sending manner is the delayed and scheduled sending manner, the indication information may further include time information. The time information may be a time point at which the first information needs to be synchronized. 
     For example, it may be determined, based on the flag bit of 2 and the time information, that the sending manner is delayed and scheduled sending. 
     Further, if the second network device determines, based on the sending policy, that the sending manner of the first information of the UE is delayed and scheduled sending, the sending manner related information of the first information may further include a preset time point of the first information of the UE. 
     Specifically, a specific implementation of S 601  may be: sending, by the first network device to the second network device, a first message carrying the first information of the UE. Optionally, the first message may further carry the sending manner related information of the first information. 
     S 602 : The first network device receives the first information of the UE sent by the second network device. 
     Further, if the second network device further sends the sending manner related information of the first information when sending the first information of the UE to the first network device, S 602  further includes: receiving, by the first network device, the sending manner related information of the first information of the UE sent by the second network device. 
     Specifically, S 602  includes: receiving, by the first network device, the first message sent by the second network device, where the first message carries the first information of the UE. 
     Further, the first message may carry the sending manner related information of the first information. 
     Optionally, if the UE is in an idle mode, S 603  is performed. 
     S 603 : The first network device determines a sending manner of the first information of the UE based on sending manner related information of the first information. 
     Step S 603  is performed when the UE is in the idle mode. 
     The sending manner related information of the first information may be sent by the second network device in S 601 . 
     When the sending manner related information of the first information includes the sending policy, the sending manner related information may also be stored in the first network device. This is not specifically limited in this embodiment of the present application. 
     Specifically, a solution of performing S 603  varies with different content included in the sending manner related information of the first information. 
     When the sending manner related information of the first information includes the sending manner indication information of the first information, S 603  is specifically performed as: determining that the sending manner of the first information is the sending manner indicated by the sending manner indication information; or when the sending manner related information of the first information includes the sending policy, S 603  is specifically performed as: determining the sending manner of the first information based on the sending policy. 
     It should be noted that, a specific process of determining the sending manner of the first information based on the sending policy is already described in S 601 , and details are not described herein again. 
     According to the method for processing information provided in this application, the UE is in the idle mode, and when receiving the first information of the UE in the idle mode that is sent by the second network device, the first network device determines the sending manner of the first information based on the sending manner related information of the first information, and determines whether to immediately send the first information to the UE. When the determined sending manner is delayed sending or delayed and scheduled sending, the UE in the idle mode does not need to be immediately paged and waken up to receive the first information, thereby reducing signaling overheads for paging the UE, and reducing signaling overheads of an air interface. 
     Optionally, S 602  includes: receiving, by the first network device, the first message sent by the second network device, where the first message carries the first information and the sending manner related information of the first information. 
     After S 603 , the method further includes: 
     if the sending manner of the first information is delayed sending or delayed and scheduled sending, setting the first message to a wait state; or if the sending manner of the first information is immediate sending, sending a paging message to the UE; and sending the first information to the UE when the UE enters a connected mode. 
     Further, after the setting the first message to a wait state, the method may include: 
     if the sending manner of the first information is delayed sending or delayed and scheduled sending and the first message is in the wait state, processing the first message when the UE enters the connected mode; or if the sending manner of the first information is delayed and scheduled sending and the first message is in the wait state, processing the first message when the preset time point of the first message is reached. 
     For example, the processing the first message may include: sending the first information to the UE; or encapsulating the first information in the first message into a second message, and sending the second message to the UE; or processing the first information and sending processed information as second information to the UE. This is not limited. 
     Optionally, as shown in  FIG. 7 , after S 603 , the method may further include the following step: 
     S 604 : The first network device sends the first information to the UE based on the sending manner of the first information. 
     When the first network device sends the first information to the UE, the first information may be included in a message for sending. A type of the message is not specifically limited in this embodiment of the present application. 
     For example, in the session management procedure, when the network side modifies session information of the UE, the first network device needs to send modified session information to the UE, to be specific, add the first information to a session management request and send the session management request. 
     For example, the first information that may be included in the session management request is context information corresponding to at least one communications link in a session set up between the UE and a network, for example, updated QoS information, traffic flow information, or an APN-AMBR. 
     Specifically, in S 604 , a process in which the first network device sends the first information to the UE based on the sending manner first information varies with different sending manners of the first information that are determined by the first network device. The following three cases may be specifically included: 
     Case 1: The sending manner of the first information of the UE is delayed sending. 
     In Case 1, a specific implementation of the sending, by the first network device, the first information to the UE based on the sending manner of the first information may be: 
     sending the first information to the UE when the UE enters the connected mode. 
     Case 2: The sending manner of the first information of the UE is delayed and scheduled sending. 
     In Case 2, a specific implementation of the sending, by the first network device, the first information to the UE based on the sending manner of the first information may be: 
     sending the first information to the UE when the UE enters the connected mode or the preset time point of the first information is reached. 
     In Case 2, the sending the first information to the UE when the UE enters the connected mode specifically includes: 
     if the UE enters the connected mode before the preset time point of the first information is reached, sending the first information to the UE when the UE enters the connected mode. 
     Further optionally, the following two implementations may be included for the preset time point of the first information: 
     First implementation: The sending manner related information of the first information includes the preset time point of the first information. 
     Second implementation: Upon reception of the first information, a timer starts timing, and when the timer expires, the preset time point of the first information is reached. 
     Currently, the preset time point of the first information may be implemented in a manner other than the foregoing two implementations. This is not specifically limited in this embodiment of the present application. 
     Case 3: The sending manner of the first information of the UE is immediate sending. 
     In Case 3, a specific implementation of the sending, by the first network device, the first information to the UE based on the sending manner of the first information of the UE may be: 
     after determining the sending manner of the first information of the UE, immediately sending a paging message to the UE, and sending the first information to the UE when the UE enters the connected mode. 
     Further, in each of the foregoing three cases, the first information is sent to the UE when the UE enters the connected mode. An implementation process of sending the first information to the UE when the UE enters the connected mode is described below and is applicable to any one of the foregoing three cases. 
     Specifically, that the UE enters the connected mode is determined in a plurality of manners, and any method that can be used to determine that the UE enters the connected mode is applicable to this embodiment of the present application. This is not specifically limited in this embodiment of the present application. 
     Several implementation processes of sending the first information to the UE when the UE enters the connected mode are described in detail below. 
     First Implementation Process: 
     A location update request sent by the UE is received, where the location update request carries object information of the UE; and the first information is sent to the UE based on the object information. 
     The object information of the UE includes an identifier of an object related to the UE and a current status (active or inactive) of the object. An object to which the first information belongs is a subject reflected by the first information, and the first information is attribute information of the object to which the first information belongs. 
     For example, in the session management procedure, an object is a session or an object is a bearer included in a session. 
     Specifically, the sending the first information to the UE based on the object information specifically includes: 
     determining, based on the object information, whether the object to which the first information belongs is in the active state or is a newly created object; and sending the first information to the UE if the object to which the first information belongs is in the active state or is a newly created object. 
     Further, the determining, based on the object information, whether the object to which the first information belongs is in the active state specifically includes: 
     searching the object information for the current status of the object to which the first information belongs, to determine whether the object to which the first information belongs is in the active state. 
     Further, the determining, based on the object information, whether the object to which the first information belongs is a newly created object specifically includes: 
     searching the object information, where if the object information does not include the object to which the first information belongs, the object to which the first information belongs is a newly created object; otherwise, the object to which the first information belongs is not a newly created object. 
     Further, in the first implementation process, a process of sending the first information to the UE may be specifically implemented in the following two manners: 
     Manner A: A location update response message is sent to the UE, where the location update response message includes the first information. 
     In Manner A, after the first network device sends, to the UE, the location update response message including the first information, the UE sends, to the first network device, a location update complete message including a session management response. The location update complete message including the session management response is used as a response message of the first information. 
     Manner B: A context setup message including the first information is sent to an access network device, so that the access network device sends, to the UE, an RRC reconfiguration message including the first information. 
     A location update response message is further sent to the UE. 
     In Manner B, after receiving the context setup message including the first information, the access network device sends, to the UE, the RRC reconfiguration message including the first information. Then, the UE sends, to the access network device, a reconfiguration message including a response message of the first information. Next, the access network device sends, to the first network device, a context setup response message including the response message of the first information. 
     It should be noted that, whether the first information is sent to the UE in Manner A or Manner B may be determined according to an actual requirement. This is not specifically limited in this embodiment of the present application. 
     Second Implementation Process: 
     A service request sent by the UE is received, where the service request carries object information of the UE; and the first information is sent to the UE based on the object information. 
     It should be noted that, the sending the first information to the UE based on the object information is already described in detail in the foregoing first implementation process, and details are not described herein again. 
     It should be noted that, when the first network device sends the first information to the UE, if an information mode between the first network device and the UE is different from an information mode between the first network device and the second network device, the first information is converted and then sent based on a mapping relationship between the two information modes. Any manner of notifying the UE of the first information falls within the protection scope of the present application. 
     Optionally, as shown in  FIG. 7 , after S 603 , if the sending manner of the first information is delayed sending or delayed and scheduled sending, the method may further include the following step: 
     S 603   a : The first network device sets the first information to a wait state. 
     The wait state is used to indicate that the first information is to be sent. 
     An implementation of the setting the first information to a wait state may be: setting an identifier to record the wait state; or may be: storing the first information into a buffer to record the wait state. 
     Optionally, the object to which the first information belongs may be set to the wait state, to set the first information to the wait state. Alternatively, a message in which the first information is located may be set to the wait state, to set the first information to the wait state. 
     Further, if the method includes S 603   a , S 604  may be implemented as: 
     if the sending manner of the first information is delayed sending or delayed and scheduled sending and the first information is in the wait state, sending the first information to the UE when the UE enters the connected mode; or if the first information of the sending manner is delayed and scheduled sending and the first information is in the wait state, sending the first information to the UE when the preset time point of the first information is reached. 
     Corresponding to S 603   a , as shown in  FIG. 7 , after the first network device sends the first information to the UE in S 604 , the method may further include the following step: 
     S 604   a : The first network device cancels the wait state of the first information. 
     If the implementation of the setting the first information to a wait state is setting an identifier to record the wait state, the canceling the wait state of the first information is deleting the specified identifier or modifying an identifier to cancel the wait state. If the implementation of the setting the first information to a wait state is storing the first information into a particular buffer, the canceling the wait state of the first information is deleting the first information from the buffer after the first information is sent to the UE. 
     Optionally, as shown in  FIG. 7 , before the first information is sent to the UE in S 604 , the method may further include the following step: 
     S 604   b : The first network device receives second information of the UE sent by the second network device. 
     It should be noted that, S 604   b  is the same as S 602 , and details are not described herein again. 
     Further, as shown in  FIG. 7 , after S 604   b , the method includes the following step: 
     S 604   c : The first network device determines a sending manner of the second information based on sending manner related information of the second information. 
     It should be noted that, S 604   c  is the same as S 603 , and details are not described herein again. 
     Further, if the method for processing information provided in this embodiment of the present application includes S 604   b  and S 604   c , a specific implementation of the sending the first information to the UE in S 604  is as follows: 
     If the first information and the second information belong to a same object, the first information to be sent is deleted, and only the second information is sent to the UE. A specific sending manner is the sending manner of the second information. 
     If the first information and the second information belong to different objects, the first information and the second information need to be sent to the UE. The sending manners of the first information and the second information are as follows: 
     If the sending manners of the first information and the second information are both delayed sending, the sending manners are delayed sending; if the sending manners of the first information and the second information include delayed sending and delayed and scheduled sending, the sending manners are delayed and scheduled sending; or if the sending manners of the first information and the second information are both delayed and scheduled sending, the sending manners are delayed and scheduled sending, and sending is performed based on a time point that is first reached. 
     An implementation of the sending the first information and the second information to the UE may be: adding the first information and the second information to one message and sending the message to the UE. 
     It should be noted that, if the first network device receives a plurality of pieces of information of the UE before sending the first information, a processing process is the same as the foregoing processing process when the second information is received, and details are not described herein again. 
     Optionally, as shown in  FIG. 7 , after S 602 , the method may further include the following step: 
     S 602   a : The first network device sends a sending indication of the first information to the second network device. 
     Optionally, the sending indication of the first information is used to indicate the sending manner of the first information that is determined by the first network device. 
     Optionally, the sending indication of the first information may be included in the response message of the first information and sent to the second network device. 
     Optionally, as shown in  FIG. 7 , after the first information is sent to the UE in S 604 , the method may further include S 605  and S 606 . 
     S 605 : The UE sends a response message of the first information to the first network device. 
     The response message of the first information is used to notify the first network device that the UE already receives the first information. 
     S 606 : The first network device receives the response message of the first information that is sent by the UE. 
     Optionally, as shown in  FIG. 7 , after S 606 , the method may further include S 607  and S 608 . 
     S 607 : The first network device sends a complete indication message of the first information to the second network device. 
     S 608 : The second network device receives the complete indication message of the first information that is sent by the first network device. 
     Optionally, as shown in  FIG. 7 , after the first information is sent to the UE in S 604 , the method may further include the following steps: 
     S 609 : If the first network device fails to send the first information to the UE, the first network device sends a failure indication to the second network device. 
     S 610 : The second network device receives the failure indication that is sent by the first network device when the first network device fails to send the first information to the UE. 
     Optionally, as shown in  FIG. 7 , after S 602 , the method may further include the following step: 
     S 611 : The first network device notifies a user plane network device of the first information. 
     It should be noted that, S 611  only needs to be performed after S 602 , and a specific execution sequence of S 611  is not specifically limited in this embodiment of the present application. 
     It should further be noted that, an execution sequence of the steps in the method for processing information provided in this embodiment of the present application may be set according to an actual requirement.  FIG. 6  and  FIG. 7  each merely schematically show an execution sequence of the steps in the method for processing information provided in this embodiment of the present application, and are not intended to impose a specific limitation. 
     According to another aspect, an embodiment of the present application provides another method for processing information. The method is applied to the communications network architecture shown in  FIG. 1  or the EPS network architecture shown in  FIG. 2 . In this embodiment, a process of interaction between a first network device and a second network device is used as an example to describe the method for processing information provided in this embodiment of the present application. 
     As shown in  FIG. 8 , the method may include the following steps. 
     S 801 : The second network device sends first information of UE and sending manner indication information of the first information to the first network device. 
     It should be noted that, the sending manner indication information of the first information is already described in detail in the foregoing embodiment, and details are not described herein again. 
     S 802 : The first network device receives the first information of the UE and the sending manner indication information of the first information that are sent by the second network device. 
     Specifically, if the UE is an idle mode, and the sending manner indication information indicates that send the first information in a delayed sending manner or a delayed and scheduled sending manner, S 803  is performed. 
     S 803 : The first network device sets the first information to a wait state. 
     The wait state is used to indicate that the first information is to be sent. 
     According to the method for processing information provided in this application, when sending the first information of the UE in the idle mode to the first network device, the second network device also provides the sending manner indication information of the first information; and if the sending manner indication information indicates that send the first information in the delayed sending manner or the delayed and scheduled sending manner, the first network device sets the first information to the wait state, without immediately paging and waking up the UE in the idle mode to receive the first information, thereby reducing signaling overheads of the UE, and reducing signaling overheads of an air interface. 
     Further, after S 803 , the method may include: 
     sending the first information to the UE when the UE enters a connected mode and the first information is in the wait state; or 
     sending the first information to the UE when a preset time point of the first information is reached and the first information is in the wait state. 
     It should be noted that, a process of sending the first information to the UE when the UE enters the connected mode and a process of sending the first information to the UE when the preset time point of the first information is reached are already described in detail in the foregoing embodiment, and details are not described herein again. 
     It should be noted that, the first information of the UE in the embodiment shown in  FIG. 8  is the same as the first information of the UE in the embodiment shown in  FIG. 6  or  FIG. 7 , and for another process that is not described in the method for processing information shown in  FIG. 8 , refer to the processes and the steps described in  FIG. 6  or  FIG. 7 , and details are not described herein again. 
     It should be noted that, a process of processing the first information of the UE is described in  FIG. 6 ,  FIG. 7 , and  FIG. 8 . Generally, the first information is included in a message and sent by the second network device to the first network device. Therefore, in this embodiment of the present application, the message including the first information may be processed. Related descriptions are provided in the following embodiment. 
     According to another aspect, an embodiment of the present application provides a method for processing a message, applied to the communications network architecture shown in  FIG. 1  or the EPS system architecture shown in  FIG. 2 . In this embodiment, a process of interaction between a first network device and a second network device is used as an example to describe the method for processing a message provided in this embodiment of the present application. 
     As shown in  FIG. 9 , the method may include the following steps. 
     S 901 : The second network device sends a first message to the first network device. 
     It should be noted that, a type of the first message is not specifically limited in this embodiment of the present application. The first message includes first information of UE. Specifically, for the first information, refer to related descriptions in the embodiment shown in  FIG. 6 . 
     Optionally, in a session management procedure, the first message is a session modification request, a bearer modification request, a bearer setup request, or a bearer deletion request. A bearer is context information created by the UE and a network side for data transmission, and may specifically include a bearer identifier, TFT information, a QoS parameter, and the like. Optionally, when sending the first message to the first network device in the S 901 , the second network device may further send processing manner indication information or a processing policy of the first message to the first network device. 
     The processing manner indication information is used to indicate a processing manner of the first message. The processing policy is similar to the foregoing sending policy, and details are not described herein again. 
     Specifically, the first message may carry the processing manner indication information and the first information of the UE. The processing manner indication information may be used to indicate a processing manner of the first information of the UE, and may also be used to indicate the processing manner of the first message. This is not limited herein. The processing manner may be immediate processing, delayed processing, or delayed and scheduled processing. 
     Immediate processing may be implemented by using a synchronization indication (synchronization indication), and delayed processing or delayed and scheduled processing may be implemented by using an asynchronization indication (asynchronization indication). Further, delayed and scheduled processing may be determined by determining whether the first message carries time related indication information. For example, if the first message carries an asynchronization indication and time indication information, the processing manner of the first message is delayed and scheduled processing. If the first message carries an asynchronization indication and carries no time indication information, the processing manner of the first message is delayed processing. If the first message carries a synchronization indication, the processing manner of the first message is immediate processing. 
     Apparently, the synchronization indication and the asynchronization indication each may be implemented by using one bit. This is not limited. 
     In addition, the processing manner may alternatively be indicated by using two bits. For example, 00 indicates immediate processing, 01 indicates delayed sending, and 10 indicates delayed and scheduled sending. Further, refer to related descriptions of the sending manner indication information in the embodiment shown in  FIG. 6 , and details are not described again. 
     Optionally, before S 901 , the method further includes: 
     determining, by the second network device, the first information of the UE and the processing manner of the first information, and sending the first message to the first network device. 
     The first message may carry the processing manner indication information and the first information of the UE. The processing manner indication information is used to indicate the processing manner determined in step S 901 . For example, when a QoS changes and a session parameter changes, or when a session is deleted, the second network device determines to update, to the UE, parameter information that changes. For details, refer to related descriptions in the embodiment shown in  FIG. 6 , and details are not described again. 
     Correspondingly, if the second network device further sends the processing manner indication information or the processing policy to the first network device when sending the first message to the first network device in S 901 , before S 901 , the method further includes: obtaining, by the second network device, the processing manner indication information or the processing policy of the first message. 
     The obtaining, by the second network device, the processing manner indication information or the processing policy is similar to the obtaining, by the second network device, the sending manner related information of the first information described in S 601 , and details are not described herein again. 
     S 902 : The first network device receives the first message sent by the second network device. 
     Optionally, if the UE is in an idle mode, step S 903  is performed. 
     S 903 : The first network device determines that a processing manner of the first message is delayed processing or delayed and scheduled processing, and stores the first message, or stores a second message generated based on the first message. 
     Step S 903  is performed when the UE is in the idle mode. 
     The second message generated based on the first message is a second message generated through parsing and encapsulation based on a function and a destination device of the first message after the first message is received. 
     For example, in the session management procedure, the first message is a session modification request, a bearer modification request, a bearer setup request, or a bearer deletion request including information synchronized or updated to the UE. When receiving the session modification request, the bearer modification request, the bearer setup request, or the bearer deletion request, the first network device performs parsing and encapsulation to generate a session management request or a bearer management related request (modification, setup, or deletion) to be sent to the UE. The session management request or the bearer management related request includes the information synchronized or updated to the UE, and the session management request is the second message generated based on the first message. 
     Specifically, the determining that a processing manner of the first message is delayed processing or delayed and scheduled processing in S 903  may include: 
     determining, based on the processing manner indication information, that the processing manner of the first message is delayed processing or delayed and scheduled processing; or determining, based on the processing policy, that the processing manner of the first message is delayed processing or delayed and scheduled processing. 
     It should be noted that, a process of determining, based on the processing manner indication information, that the processing manner of the first message is delayed processing or delayed and scheduled processing, or determining, based on the processing policy, that the processing manner of the first message is delayed processing or delayed and scheduled processing in S 903  is similar to a process of determining the sending manner of the first information in S 603 , and details are not described herein again. 
     The processing manner indication information may be sent by the second network device in S 901 . When the sending manner related information of the first information includes the sending policy, the sending manner related information may also be stored in the first network device. This is not specifically limited in this embodiment of the present application. 
     Alternatively, S 903  may be replaced with: 
     determining, by the first network device, that the processing manner of the first message is immediate processing, and sending a paging message to the UE. 
     For example, if the processing manner indicated by the processing manner indication information carried in the first message is immediate processing, the first network device determines that the processing manner of the first message is immediate processing. 
     According to the method for processing a message provided in this application, the message includes the first information of the UE in the idle mode, and when receiving the first message sent by the second network device, the first network device determines whether to immediately process the first message. When it is determined that the processing manner of the first message is delayed processing or delayed and scheduled processing, the UE in the idle mode does not need to be immediately paged and waken up to process the first message, thereby reducing signaling overheads for paging the UE, and reducing signaling overheads of an air interface. 
     Further, after S 903 , the method may include: processing the first message or the second message based on the processing manner of the first message. 
     Specifically, a specific implementation of the processing the first message or the second message based on the processing manner of the first message may be: 
     if the processing manner of the first message is delayed processing, processing the first message or the second message when the UE enters a connected mode; or if the processing manner of the first message is delayed and scheduled processing, processing the first message or the second message when the UE enters a connected mode or a preset time point of the first message is reached. 
     It should be noted that, a process of processing the first message or the second message when the UE enters the connected mode is similar to a process of sending the first information to the UE when the UE enters the connected mode described in S 604 , and details are not described herein again. A process of processing the first message or the second message when the UE reaches the preset time point of the first message is similar to a process of sending the first information to the UE when the preset time point of the first information is reached in S 604 , and details are not described herein again. 
     Further, after S 903 , the method may include: 
     if the processing manner of the first message is delayed processing or delayed and scheduled processing, setting the first message to a wait state or the second message to a wait state. 
     The wait state is used to indicate that the first message or the second message is to be processed. 
     Correspondingly, if the first message is set to the wait state or the second message is set to the wait state after S 903 , specifically, a specific implementation of the processing the first message or the second message based on the processing manner of the first message may be: 
     if the processing manner of the first message is delayed processing or delayed and scheduled processing, processing, when the UE enters the connected mode, the first message or the second message in the wait state; or if the processing manner of the first message is delayed and scheduled processing, processing, when the preset time point of the first information is reached, the first message or the second message in the wait state. 
     It should be noted that, for another process that is not described in the method for processing a message shown in  FIG. 9 , refer to the processes and the steps in the method for processing information described in  FIG. 6  or  FIG. 7 , provided that an operation performed on the first information is replaced with an operation performed on the first message, and details are not described herein again. 
     The methods provided in the embodiments of the present application are described below with reference to scenarios. 
     Embodiment 1 
     In a 5G network architecture, a first network device is a CP, and a second network device is a PF. An example in which session management is implemented through interaction between the CP and the PF is used to describe a method for processing information provided in this embodiment of the present application. 
     As shown in  FIG. 10 , the method may include the following steps. 
     S 1001 : When a session set up between UE and a network is updated, the PF determines a sending manner of updated session information. 
     For details about the sending manner, refer to related descriptions in the embodiment shown in  FIG. 6 . 
     Specifically, in S 1001 , the PF determines the sending manner of the updated session information, and determines whether the updated session information needs to be immediately updated and synchronized to a UE side. 
     Specifically, the PF may determine the sending manner of the updated session information based on subscription information, a request sent by an application function (AF), updated information attribute in a session, or the like. 
     S 1002 : The PF sends, to the CP, a session modification request including sending manner indication information. 
     The indication information is used to indicate the sending manner of the updated session information that is determined by the PF. 
     The session modification request further includes the updated session information. 
     S 1003 : The CP receives the session modification request. 
     S 1004 : If the UE is in an idle mode, the CP determines the sending manner of the updated session information based on the sending manner indication information in the session modification request. 
     If the CP determines that the sending manner of the updated session information is delayed sending or delayed and scheduled sending in S 1004 , S 1005  is performed. 
     If the CP determines that the sending manner of the updated session information is immediate sending in S 1004 , the CP sends a paging message to the UE in the idle mode, and then sends, to the UE when the UE enters a connected mode, a session management request including the updated session information. 
     S 1005 : The CP sets the updated session information to a wait state. 
     S 1006 : The CP sends a response to the session modification request to the PF. 
     S 1007 : The CP initiates a session update procedure to a user plane (UP). 
     The CP initiates the session update procedure to the UP, to synchronize the updated session information to a user plane network device. 
     S 1008 : The CP sends a session management request to the UE based on the determined sending manner of the updated session information. 
     The session management request includes the updated session information. 
     Specifically, a specific implementation of S 1008  may include the following several cases: 
     Case 1: If the sending manner of the updated session information that is determined by the CP is delayed sending, the CP triggers a session management procedure, sends the session management request to the UE, and synchronizes the updated session information to the UE when the UE enters the connected mode. 
     Case 2: The sending manner of the updated session information that is determined by the CP is delayed and scheduled sending, and indication information included in the session modification request is a time point. If the UE enters the connected mode before the time point is reached, a session management procedure is performed during a setup of a connection, and the session management request is sent to the UE; or if the UE does not enter the connected mode when the time point is reached, the CP pages the UE, triggers a session management procedure, and sends the session management request to the UE. 
     It should be noted that, a specific execution process of S 1008  is already described in detail in S 604 , and details are not described herein again. 
     S 1009 : The CP initiates a setup of an access network (AN) context to the UP. 
     S 1010 : The CP sends an update complete indication message to the PF. 
     S 1010  is performed after the CP determines that the UE already receives the session management request. 
     It should be noted that, S 1007  and S 1009  may be combined and performed in S 1009 . 
     Further, in the method for processing information in this embodiment, the CP may receive a plurality of session modification requests, a processing method is the same as specific implementation processes of S 604   b  and S 604   c , and a specific implementation process of S 604  when S 604   b  and S 604   c  exist, and details are not described herein again. 
     It should be noted that, the solution shown in  FIG. 10  may further include an optional step in the solution shown in  FIG. 7 , and details are not described herein again. 
     For example, before S 1008 , if the CP receives another session modification request sent by the PF, the CP may combine and process a plurality of received session modification requests. A combination and processing process is already described in detail in the embodiment shown in  FIG. 7 , and details are not described herein again. 
     Embodiment 2 
     A difference from Embodiment 1 lies in that in Embodiment 2, a PF provides a sending policy to a CP, and the CP determines a sending manner of updated session information based on the sending policy. 
     Specifically, as shown in  FIG. 11 , the method may include the following steps. 
     S 1101 : The PF sends, to the CP, a sending policy for determining information about UE. 
     The sending policy may include: a sending manner of session information corresponding to a guaranteed bit rate communication link is immediate sending; a sending manner of session information corresponding to a non-guaranteed bit rate communication link is delayed sending; a sending manner of session information of a roaming user is delayed sending; a sending manner of session information corresponding to a communications link corresponding to a high-priority service is immediate sending; and the like. 
     S 1102 : When a session set up between the UE and a network is updated, the PF sends, to the CP, a session modification request including updated session information. 
     S 1103 : The CP receives the session modification request. 
     S 1104 : If the UE is in an idle mode, the CP determines a sending manner of the updated session information based on the session modification request and the sending policy. 
     Execution of the solution of the method shown in  FIG. 11  after S 1104  is the same as that after S 1004  in the method shown in  FIG. 10 , and details are not described herein again. 
     Embodiment 3 
     In a roaming scenario in a 5G network architecture, first network devices are a home network-control plane network device (H-CP) and a visited network-control plane network device (V-CP), and a second network device is a PF. An example in which session management is implemented through interaction among the H-CP, the V-CP, and the PF is used to describe a method for processing information provided in this embodiment of the present application. 
     Specifically, as shown in  FIG. 12 , the method may include the following steps: 
     S 1201 : When a session set up between UE and a network is updated, the PF determines a sending manner of updated session information. 
     S 1202 : The PF sends, to the H-CP, a session modification request including sending manner indication information. 
     S 1203 : The H-CP sends the session modification request to the V-CP. 
     S 1204 : The V-CP receives the session modification request. 
     S 1205 : If the UE is in an idle mode, the V-CP determines a sending manner of the updated session information based on the sending manner indication information in the session modification request. 
     Execution of the solution of the method shown in  FIG. 12  after S 1205  is the same as that after S 1004  in the method shown in  FIG. 10 , and details are not described herein again. An only difference lies in that an operation performed by the CP in  FIG. 10  is performed by the V-CP in the solution shown in  FIG. 12 , and a process of sending from the CP to the PF in  FIG. 10  is replaced with a process of sending from the V-CP to the PF by using the H-CP in the solution shown in  FIG. 12 . 
     Further, in the solution shown in  FIG. 12 , S 1201  to S 1205  may be replaced with S 1101  to S 1104  in the solution shown in  FIG. 11 . An only difference lies in that an operation performed by the CP in  FIG. 11  is performed by the V-CP in the solution shown in  FIG. 12 , and a process of sending from the CP to the PF in  FIG. 11  is replaced with a process of sending from the V-CP to the PF by using the H-CP in the solution shown in  FIG. 12 . 
     Embodiment 4 
     In an LTE network architecture, a first network device is an MME, and a second network device is a P-GW. An example in which session management is implemented through interaction between the MME and the P-GW by using an S-GW is used to describe a method for processing information provided in this embodiment of the present application. 
     As shown in  FIG. 12 a   , the method may include the following steps. 
     S 1201   a : The P-GW sends, to the S-GW, a session modification request including updated session information. 
     The session modification request may further include sending manner indication information or a sending policy of the updated session information. 
     The P-GW sends, to the S-GW, the session modification request including the updated session information, so that the S-GW forwards, to the MME, the session modification request including the updated session information. 
     Optionally, when a session set up between UE and a network is updated, the P-GW may directly send the sending policy to the S-GW for forwarding to the MME, so that when receiving the session modification request, the MME determines a sending manner of the updated session information. In this case, the session modification request includes the sending policy. 
     Optionally, when a session set up between UE and a network is updated, the P-GW may determine a sending manner of the updated session information. In this case, the session modification request includes the sending manner indication information of the updated session information that is used to indicate the sending manner of the updated session information that is determined by the P-GW. 
     It should be noted that, a process of determining the sending manner of the updated session information by the P-GW is similar to a process of determining the sending manner of the updated session information by the PF in S 1001 , and details are not described herein again. 
     S 1202   a : The S-GW receives the session modification request. 
     S 1203   a : The S-GW sends the session modification request to the MME. 
     After receiving the session modification request in S 1202   a , optionally, the S-GW needs to parse and encapsulate the session modification request and then send the session modification request to the MME. Parsing and encapsulation processes are not limited in this embodiment of the present application. 
     The session modification request obtained after the parsing and encapsulation includes the updated session information. 
     S 1204   a : The MME receives the session modification request sent by the S-GW. 
     S 1205   a : If UE is in an idle mode, the MME determines a sending manner of the updated session information based on the session modification request. 
     If the MME determines that the sending manner of the updated session information is delayed sending or delayed and scheduled sending in S 1205   a , S 1206   a  is performed. 
     If the MME determines that the sending manner of the updated session information is immediate sending in S 1205   a , the MME sends a paging message to the UE in the idle mode, and then sends, to the UE when the UE enters a connected mode, a session management request including the updated session information. 
     S 1206   a : The MME sets the updated session information to a wait state. 
     S 1207   a : The MME sends a response to the session modification request to the S-GW. 
     S 1208   a : The S-GW receives the response to the session modification request that is sent by the MIME. 
     S 1209   a : The S-GW sends a response of the session modification request to the P-GW. 
     S 1210   a : The MME sends a session management request to the UE based on the determined sending manner of the updated session information. 
     It should be noted that, a specific implementation process of S 1210   a  is similar to an implementation process of S 1008 , and details are not described herein again. 
     It should be noted that, execution of the solution of the method shown in  FIG. 12 a    after S 1210   a  is the same as that after S 1008  in the method shown in  FIG. 10 , and details are not described herein again. 
     It should be noted that, the solution shown in  FIG. 12 a    may further include an optional step in the solution shown in  FIG. 7 , and details are not described herein again. 
     For example, before S 1210   a , if the MME receives another session modification request forwarded by the S-GW, the MME may combine and process a plurality of received session modification requests. A combination and processing process is already described in detail in the embodiment shown in  FIG. 7 , and details are not described herein again. 
     Further, in the methods in the foregoing four embodiments, the sending policy may be replaced with a processing policy, or the sending manner indication information may be replaced with processing manner indication information, so that the foregoing three embodiments are described as a method for processing a message. Details are described by using the following embodiments. 
     Embodiment 5 
     In a 5G network architecture, a first network device is a CP, and a second network device is a PF. An example in which session management is implemented through interaction between the CP and the PF is used to describe a method for processing a message provided in this embodiment of the present application. 
     As shown in  FIG. 13 , the method may include the following steps. 
     S 1301 : The PF sends, to the CP, a session modification request including updated session information. 
     The session modification request may further include processing manner indication information or a processing policy of the session modification request. 
     Optionally, when a session set up between UE and a network is updated, the PF may directly send the processing policy to the CP, so that when receiving the session modification request, the CP determines a processing manner of the session modification request. In this case, the session modification request includes the processing policy. 
     Optionally, when a session set up between UE and a network is updated, the PF may determine a processing manner of the session modification request. In this case, the session modification request includes the processing manner indication information used to indicate the processing manner of the session modification request that is determined by the PF. 
     It should be noted that, a process of determining the processing manner of the session modification request by the PF is similar to a process of determining the sending manner of the updated session information by the PF in S 1001 , and details are not described herein again. 
     S 1302 : The CP receives the session modification request. 
     After S 1302 , if the UE is in an idle mode, and the CP determines that the processing manner of the session modification request is delayed processing or delayed and scheduled processing, S 1303  is performed. 
     If the CP determines that the processing manner of the session modification request is immediate processing, the CP sends a paging message to the UE in the idle mode, and then, when the UE enters a connected mode, processes the session modification request or processes a session management request generated based on the session modification request. 
     S 1303 : The CP stores the session modification request, or stores a session management request generated based on the session modification request. 
     The session management request is generated based on the session modification request, and is a request message for sending, to the UE, the updated session information included in the session modification request. 
     S 1304 : The CP sets the session modification request to a wait state. 
     S 1305 : The CP sends a response to the session modification request to the PF. 
     S 1306 : The CP initiates a session update procedure to the UP. 
     The CP initiates the session update procedure to the UP, to synchronize the updated session information to a user plane network device. 
     S 1307 : The CP processes the session modification request or the session management request based on a determined processing manner of the session modification request. 
     The processing the session modification request includes generating a corresponding session management request and sending the session management request to the UE. The processing the session management request includes sending the session management request to the UE. 
     Specifically, a specific implementation of S 1307  may include the following several cases: 
     Case 1: If the processing manner of the session modification request that is determined by the CP is delayed processing, the CP processes the session modification request or the session management request when the UE enters the connected mode. 
     Case 2: The processing manner of the session modification request that is determined by the CP is delayed and scheduled processing, and the session modification request further includes a preset time point of the session modification request. Before the preset time point is reached and when the UE enters the connected mode, the session modification request or the session management request is processed. If the UE does not enter the connected mode when the preset time point is reached, the CP pages the UE, and processes the session modification request or the session management request when the UE enters the connected mode. 
     It should be noted that, execution of the solution of the method shown in  FIG. 13  after S 1307  is the same as that after S 1008  in the method shown in  FIG. 10 , and details are not described herein again. 
     It should be noted that, the solution shown in  FIG. 13  may further include an optional step in the solution shown in  FIG. 7 , and details are not described herein again. 
     For example, before S 1307 , if the CP receives another session modification request sent by the PF, the CP may combine and process a plurality of received session modification requests. A combination and processing process is already described in detail in the embodiment shown in  FIG. 7 , and details are not described herein again. 
     Further, if the method in the embodiment shown in  FIG. 13  is applied to a Long Term Evolution (LTE) scenario, an MME performs a function of the CP, a PCRF performs a function of the PF, and interaction between the PCRF and MME is implemented through forwarding by a P-GW and an S-GW, to implement a method for processing a message in an LTE network. A specific process is described below. 
     Embodiment 6 
     In an LTE network architecture, an example in which session management is implemented through interaction between an MME and a P-GW by using an S-GW is used to describe a method for processing a message provided in this embodiment of the present application. 
     As shown in  FIG. 14 , the method may include the following steps. 
     S 1401 : The P-GW sends, to the S-GW, a session modification request including updated session information. 
     The session modification request may further include processing manner indication information or a processing policy of the session modification request. 
     The P-GW sends, to the S-GW, the session modification request including the updated session information, so that the S-GW forwards, to the MME, the session modification request including the updated session information. 
     Optionally, when a session set up between UE and a network is updated, the P-GW may directly send the processing policy to the S-GW for forwarding to the MME, so that when receiving the session modification request, the MME determines a processing manner of the updated session information. In this case, the session modification request includes the processing policy. 
     Optionally, when a session set up between UE and a network is updated, the P-GW may determine a processing manner of the session modification request. In this case, the session modification request includes the processing manner indication information. 
     It should be noted that, a process of determining the processing manner by the P-GW is similar to a process of determining the sending manner of the updated session information by the PF in S 1001 , and details are not described herein again. 
     S 1402 : The S-GW receives the session modification request. 
     S 1403 : The S-GW sends the session modification request to an MME. 
     After receiving the session modification request in S 1402 , optionally, the S-GW needs to parse and encapsulate the session modification request and then send the session modification request to the MME. Parsing and encapsulation processes are not limited in this embodiment of the present application. 
     S 1404 : The MME receives the session modification request from the S-GW. 
     S 1405 : If UE is in an idle mode, the MME determines a processing manner of the session modification request based on the session modification request. 
     If the MME determines that the processing manner of the session modification request is delayed processing or delayed and scheduled processing in S 1405 , S 1406  is performed. 
     If the MME determines that the processing manner of the session modification request is immediate processing in S 1405 , the MME sends a paging message to the UE in the idle mode, and then, when the UE enters a connected mode, processes the session modification request or processes a session management request generated based on the session modification request. 
     S 1406 : The MME stores the session modification request, or stores a session management request generated based on the session modification request. 
     The session management request is generated based on the session modification request, and is a request message for sending, to the UE, the updated session information included in the session modification request. 
     S 1407 : The MME sets the session modification request to a wait state. 
     S 1408 : The MME sends a response to the session modification request to the S-GW. 
     S 1409 : The S-GW receives the response to the session modification request that is sent by the MME. 
     S 1410 : The S-GW sends the response of the session modification request to the P-GW. 
     S 1411 : The MIME processes the session modification request or the session management request based on the determined processing manner of the session modification request. 
     The processing the session modification request includes: generating a corresponding session management request and sending the session management request to the UE. The processing the session management request includes: sending the session management request to the UE. 
     It should be noted that, a specific implementation process of S 1411  is similar to an implementation process of S 1307 , and details are not described herein again. 
     It should be noted that, execution of the solution of the method shown in  FIG. 14  after S 1411  is the same as that after S 1008  in the method shown in  FIG. 10 , and details are not described herein again. 
     It should be noted that, the solution shown in  FIG. 14  may further include an optional step in the solution shown in  FIG. 7 , and details are not described herein again. 
     For example, before S 1411 , if the MME receives another session modification request forwarded by the S-GW, the MME may combine and process a plurality of received session modification requests. A combination and processing process is already described in detail in the embodiment shown in  FIG. 7 , and details are not described herein again. 
     The solutions provided in the embodiments of the present application are described above mainly from a perspective of interaction between the network elements. It may be understood that, to implement the foregoing functions, the network elements such as the first network device and the second network device include corresponding hardware structures and/or software modules for performing the functions. Persons skilled in the art should easily be aware that, with reference to examples of units and algorithm steps described in the embodiments disclosed in this specification, the present application may be implemented in a hardware form or a form of a combination of hardware and computer software. Whether a function is performed by hardware or hardware driven by computer software depends on particular applications and design constraints of the technical solutions. Persons skilled in the art may use different methods to implement the described functions for each particular application, but it should not be considered that the implementation goes beyond the scope of the present application. 
     In the embodiments of the present application, functional modules of the first network device, the second network device, and the like may be divided according to the foregoing examples in the methods, for example, the functional modules may be divided by using corresponding functions, or two or more functions may be integrated into a processing module. The integrated module may be implemented in a form of hardware, or may be implemented in a form of a software functional module. It should be noted that, division of modules in the embodiments of the present application is an example, and is merely logical function division and may be other division during actual implementation. 
     When the functional modules are divided by using corresponding functions,  FIG. 15  is a possible schematic structural diagram of the first network device in the foregoing embodiment. The first network device may be configured to perform an action of the first network device in the embodiment shown in  FIG. 6  or  FIG. 7  or  FIG. 8  or  FIG. 9 , or an action of the CP in the embodiment shown in  FIG. 10  or  FIG. 11  or  FIG. 12  or  FIG. 14 , or an action of the MME in the embodiment shown in  FIG. 14 . 
     In an implementation, as shown in  FIG. 15 , a first network device  150  includes a receiving unit  1501  and a determining unit  1502 . 
     The receiving unit  1501  is configured to receive first information of UE sent by a second network device, where the UE is in an idle mode. 
     The determining unit  1502  is configured to determine a sending manner of the first information based on sending manner related information of the first information received by the receiving unit  1501 , where the sending manner includes immediate sending, delayed sending, or delayed and scheduled sending. 
     Optionally, the sending manner related information of the first information may include: sending manner indication information, where the sending manner indication information is used to indicate a sending manner of the first information received by the receiving unit  1501 ; or a sending policy, where the sending policy is used to determine a sending manner of the first information received by the receiving unit  1501 . 
     Specifically, when the sending manner related information of the first information includes the sending manner indication information, the determining unit  1502  may be specifically configured to determine that the sending manner of the first information received by the receiving unit  1501  is the sending manner indicated by the sending manner indication information. 
     Specifically, when the sending manner related information of the first information includes the sending policy, the determining unit  1502  may be specifically configured to determine, based on the sending policy, the sending manner of the first information received by the receiving unit  1501 . 
     Further, a receiving unit  1501  may be configured to: before the determining unit  1502  determines the sending manner of the first information based on the sending manner related information of the first information, receive the sending manner related information of the first information sent by the second network device. 
     Further, as shown in  FIG. 16 , the first network device  150  may include: 
     a sending unit  1503 , configured to send the first information received by the receiving unit  1501  to the UE based on the sending manner of the first information that is determined by the determining unit  1502 . 
     Optionally, the sending unit  1503  may be specifically configured to: 
     if the determining unit  1502  determines that the sending manner of the first information is delayed sending, send the first information received by the receiving unit  1501  to the UE when the UE enters a connected mode; or if the sending manner of the first information that is determined by the determining unit  1502  is delayed and scheduled sending, send the first information received by the receiving unit  1501  to the UE when the UE enters a connected mode or a preset time point of the first information is reached. 
     Further, as shown  FIG. 16 , the first network device  150  may include: 
     a setting unit  1504 , configured to: if the sending manner of the first information that is determined by the determining unit  1502  is delayed sending or delayed and scheduled sending, set the first information received by the receiving unit  1501  to a wait state, where the wait state is used to indicate that the first information is to be sent. 
     Optionally, the sending unit  1503  may be further configured to: 
     if the determining unit  1502  determines that the sending manner of the first information is delayed sending or delayed and scheduled sending and the first information is in the wait state, send the first information received by the receiving unit  1501  to the UE when the UE enters the connected mode; or if the determining unit  1502  determines that the sending manner of the first information is delayed and scheduled sending and the first information is in the wait state, send the first information received by the receiving unit  1501  to the UE when the preset time point of the first information is reached. 
     Optionally, the receiving unit  1501  may be specifically configured to receive a first message sent by the second network device, where the first message carries the first information and the sending manner related information of the first information. 
     The setting unit  1504  may be further configured to: if the sending manner of the first information is delayed sending or delayed and scheduled sending, set the first message received by the receiving unit  1501  to a wait state. 
     Optionally, the first information includes information synchronized or updated to the UE in a session management procedure. 
     In another implementation, as shown in  FIG. 17 , the first network device  150  may include a receiving unit  1701  and a setting unit  1702 . 
     The receiving unit  1701  is configured to receive first information of UE and sending manner indication information of the first information that are sent by a second network device, where the UE is in an idle mode. 
     The setting unit  1702  is configured to: if the sending manner indication information received by the receiving unit  1701  indicates that send the first information in a delayed sending manner or a delayed and scheduled sending manner, set the first information received by the receiving unit  1701  to a wait state, where the wait state is used to indicate that the first information is to be sent. 
     Further, as shown in  FIG. 18 , the first network device  150  may include a sending unit  1703 . 
     The sending unit  1703  is configured to send the first information received by the receiving unit  1701  to the UE when the UE enters a connected mode and the first information is in the wait state. 
     Alternatively, the sending unit  1703  may be configured to send the first information received by the receiving unit  1701  to the UE when a preset time point of the first information is reached and the first information is in the wait state. 
     In another implementation, as shown in  FIG. 19 , the first network device  150  may include a receiving unit  1901 , a determining unit  1902 , and a storage unit  1903 . 
     The receiving unit  1901  is configured to receive a first message sent by a second network device, where the first message includes first information of UE, and the UE is in an idle mode. 
     The determining unit  1902  is configured to determine a processing manner of the first message received by the receiving unit  1901 . 
     The storage unit  1903  is configured to: if the determining unit  1902  determines that the processing manner of the first message received by the receiving unit  1901  is delayed processing or delayed and scheduled processing, store the first message received by the receiving unit  1901 , or store a second message generated based on the first message received by the receiving unit  1901 . 
     Further, the determining unit  1902  is specifically configured to: determine, based on processing manner indication information, that the processing manner of the first message received by the receiving unit  1901  is delayed processing or delayed and scheduled processing; or determine, based on a processing policy, that the processing manner of the first message received by the receiving unit  1901  is delayed processing or delayed and scheduled processing. 
     Optionally, the first message received by the receiving unit  1901  includes the processing manner indication information or the processing policy. The processing manner indication information is used to indicate immediate processing or delayed processing or delayed and scheduled processing. 
     Further, as shown in  FIG. 20 , the first network device  150  may include a processing unit  1904 . 
     The processing unit  1904  is specifically configured to: if the determining unit  1902  determines that the processing manner of the first message is delayed processing, process, when the UE enters a connected mode, the first message or the second message stored by the storage unit  1903 ; or if the determining unit  1902  determines that the processing manner of the first message is delayed and scheduled processing, process, when the UE enters a connected mode or a preset time point of the first message is reached, the first message or the second message stored by the storage unit  1903 . 
     Further, as shown in  FIG. 20 , the first network device  150  may include a setting unit  1905 . 
     The setting unit  1905  may be specifically configured to: if the determining unit  1902  determines that the processing manner of the first message is delayed processing or delayed and scheduled processing, set the first message stored by the storage unit  1903  to a wait state or the second message stored by the storage unit  1903  to a wait state, where the wait state is used to indicate that the first message or the second message stored by the storage unit  1903  is to be processed. 
     Further, the processing unit  1904  may alternatively be configured to: if the determining unit  1902  determines that the processing manner of the first message is delayed processing or delayed and scheduled processing, process, when the UE enters the connected mode, the first message or the second message in the wait state that is stored by the storage unit  1903 ; or if the determining unit  1902  determines that the processing manner of the first message is delayed and scheduled processing, process, when the preset time point of the first information is reached, the first message or the second message in the wait state that is stored by the storage unit  1903 . 
     When an integrated unit is used,  FIG. 21  is a possible schematic structural diagram of the first network device  150  in the foregoing embodiment. The first network device  150  may include a processing module  2101  and a communications module  2102 . The processing module  2101  is configured to control and manage an action of the first network device  150 . For example, the processing module  2101  is configured to support, by using the communications module  2102 , the first network device  150  in performing S 603 , S 604   c , S 903 , S 1004 , S 1104 , S 1205 , S 1405 , and/or other processes applied to the technologies described in this specification. The processing module  2101  is further configured to support the first network device  150  in performing S 602 , S 604   b , S 606 , S 902 , S 1003 , S 1103 , S 1204 , S 1302 , and S 1404  by using the communications module  2102 . The communications module  2102  is configured to support communication between the first network device  150  and another network entity. The first network device  150  may further include a storage module  2103 , configured to store program code and data of the first network device  150 . 
     The processing module  2101  may be the processor  401  in a physical structure of the first network device  40  shown in  FIG. 4 , and may be a processor or a controller, for example, may be a CPU, a general-purpose processor, a DSP, an ASIC, an FPGA, or another programmable logical device, a transistor logical device, a hardware component, or any combination thereof. The controller/processor may implement or execute various example logical blocks, modules, and circuits described with reference to content disclosed in the present application. Alternatively, the processor may be a combination of processors implementing a computing function, for example, a combination of one or more microprocessors, or a combination of the DSP and a microprocessor. The communications module  2102  may be the transceiver  404  in the physical structure of the first network device  150  shown in  FIG. 4 , or may be a transceiver circuit, a communications interface, or the like. The storage module  2103  may be the memory in the physical structure of the first network device  150  shown in  FIG. 4 . 
     When the processing module  2101  is a processor, the communications module  2102  is a transceiver, and the storage module  2103  is a memory, the first network device  150  in  FIG. 21  in this embodiment of the present application may be the first network device  40  shown in  FIG. 4 . 
     When the functional modules are divided by using corresponding functions,  FIG. 22  is a possible schematic structural diagram of a second network device  220  in the foregoing embodiment. The second network device  220  may be configured to perform an action of the second network device in the embodiment shown in  FIG. 6  or  FIG. 7  or  FIG. 8  or  FIG. 9 , or an action of the PF in the embodiment shown in  FIG. 10  or  FIG. 11  or  FIG. 12  or  FIG. 14 , or an action of the P-GW in the embodiment shown in  FIG. 14 . 
     As shown in  FIG. 22 , the second network device  220  may include an obtaining unit  2201  and a sending unit  2202 . 
     The obtaining unit  2201  is configured to obtain sending manner related information of first information of UE, where the sending manner related information is used to determine a sending manner of the first information. 
     The sending unit  2202  is configured to send, to a first network device, the first information and the sending manner related information of the first information that is obtained by the obtaining unit  2201 . 
     Optionally, the sending manner related information of the first information includes: sending manner indication information, where the sending manner indication information is used to indicate a sending manner of the first information; or a sending policy, where the sending policy is used to determine a sending manner of the first information. 
     Further, if the sending manner related information of the first information includes the sending manner indication information, the obtaining unit  2201  is specifically configured to determine the sending manner indication information of the first information based on the sending policy. 
     When an integrated unit is used,  FIG. 23  is a possible schematic structural diagram of the second network device  220  in the foregoing embodiment. The second network device  220  may include a processing module  2301  and a communications module  2302 . The processing module  2301  is configured to control and manage an action of the second network device  220 . For example, the processing module  2301  is configured to support the second network device  220  in obtaining a sending policy or sending manner indication information, or a processing policy or processing manner indication information, and specifically performs S 1001 , S 1201 , and/or other processes applied to the technologies described in this specification. The processing module  2301  is further configured to support the second network device  220  in performing S 601 , S 801 , S 901 , S 1002 , S 1101 , S 1102 , and S 1202  by using the communications module  2302 . The communications module  2302  is configured to support communication between the second network device  220  and another network entity. The second network device  220  may further include a storage module  2303 , configured to store program code and data of the second network device  220 . 
     The processing module  2301  may be the processor  501  in a physical structure of the second network device  50  shown in  FIG. 5 , and may be a processor or a controller, for example, may be a CPU, a general-purpose processor, a DSP, an ASIC, an FPGA, or another programmable logical device, a transistor logical device, a hardware component, or any combination thereof. The controller/processor may implement or execute various example logical blocks, modules, and circuits described with reference to content disclosed in the present application. Alternatively, the processor may be a combination of processors implementing a computing function, for example, a combination of one or more microprocessors, or a combination of the DSP and a microprocessor. The communications module  2302  may be the transceiver in the physical structure of the second network device  50  shown in  FIG. 5 , or may be a transceiver circuit, a communications interface, or the like. The storage module  2303  may be the memory in the physical structure of the second network device  50  shown in  FIG. 5 . 
     When the processing module  2301  is a processor, the communications module  2302  is a transceiver, and the storage module  2303  is a memory, the second network device  220  in  FIG. 23  in this embodiment of the present application may be the second network device  50  shown in  FIG. 5 . 
     Method or algorithm steps described in combination with the content disclosed in the present application may be implemented by hardware, or may be implemented by a processor by executing a software instruction. The software instruction may include a corresponding software module. The software module may be stored in a RAM, a flash memory, a ROM, an erasable programmable read only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a register, a hard disk, a mobile hard disk, a compact disc read-only memory (CD-ROM), or any other form of storage medium well-known in the art. For example, a storage medium is coupled to a processor, so that the processor can read information from the storage medium or write information into the storage medium. Certainly, the storage medium may be a component of the processor. The processor and the storage medium may be located in the ASIC. In addition, the ASIC may be located in a core network interface device. Certainly, the processor and the storage medium may exist in the core network interface device as discrete components. 
     Persons skilled in the art should be aware that in the foregoing one or more examples, functions described in the present application may be implemented by hardware, software, firmware, or any combination thereof. When the present application is implemented by software, the foregoing functions may be stored in a computer-readable medium or transmitted as one or more instructions or code in the computer-readable medium. The computer-readable medium includes a computer storage medium and a communications medium, where the communications medium includes any medium that enables a computer program to be transmitted from one place to another. The storage medium may be any available medium accessible to a general-purpose or dedicated computer. It may be clearly understood by persons skilled in the art that, for the purpose of convenient and brief description, for a detailed working process of the foregoing system, apparatus, and unit, refer to a corresponding process in the foregoing method embodiments, and details are not described herein again. 
     In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the described apparatus embodiment is merely an example. For example, the unit division is merely logical function division and may be other division in actual implementation. For example, a plurality of units or components may be combined or integrated into another system, or some features may be ignored or not performed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections may be implemented through some interfaces. The indirect couplings or communication connections between the apparatuses or units may be implemented in electronic or other forms. 
     The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of network units. Some or all of the units may be selected based on actual requirements to achieve the objectives of the solutions of the embodiments. 
     In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each of the units may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in a form of hardware, or may be implemented in a form of hardware in addition to a software functional unit. 
     When the foregoing integrated unit is implemented in a form of a software functional unit, the integrated unit may be stored in a computer-readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for instructing a computer device (which may be a personal computer, a server, a network device, or the like) to perform some of the steps of the methods described in the embodiments of the present application. The foregoing storage medium includes: any medium that can store program code, such as a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disc. 
     Finally, it should be noted that the foregoing embodiments are merely intended for describing the technical solutions of the present application rather than limiting the present application. Although the present application is described in detail with reference to the foregoing embodiments, persons of ordinary skill in the art should understand that they may still make modifications to the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features thereof, without departing from the spirit and scope of the technical solutions of the embodiments of the present application.