an embodiment of the present invention provides a method for acquiring cpe function configuration information . the method includes the following steps : step 201 : the cpe sets up a cwmp session with the acs . step 202 : the acs sends a command to the cpe to request the cpe to upload cpe function configuration information . step 203 : after receiving the command , the cpe uploads the cpe function configuration information to a server . the cpe function configuration information may be the parameter type supported by the cpe and / or the parameter value range , or a function configuration method supported by the cpe . the method is described in detail according to the two cases . when the cpe function configuration information is the parameter type supported by the cpe and / or the parameter value range , the flowchart of the method is shown in fig3 and the method includes the following steps : step 301 : the cpe sets up a cwmp session with the acs . step 302 : the acs sends a command to the cpe to request the cpe to upload the parameter type supported by the cpe and / or the parameter value range . step 303 : after receiving the command , the cpe uploads the parameter type supported by the cpe and / or the parameter value range to the server . the parameter type supported by the cpe or the parameter value range may be automatically generated by the cpe or may be provided by the cpe vendor and stored on the cpe . and this does not affect the implementation of the present invention . in general , the xml schema is adopted to describe the parameter type supported by the cpe and / or the parameter value range . other languages may also be used , which does not affect the implementation of the present invention . in actual applications , the server may be a specified server or the acs . the server is a server whose address is specified by a user ( namely , the acs ). based on the preceding information , technical person in this field may know that the cpe may upload the cpe function configuration information to the acs or other servers ( hereinafter referred to as a specified server ) other than the acs according to the request sent from the acs . in other words , the acs requests the cpe to upload cpe function configuration information to a specified object , that is , a specified server . the specified object may be the acs or a specified server other than the acs . if the specified object is the acs , the acs can of course configure the cpe according to the acquired cpe function configuration information . if the specified object is a specified server other than the acs , two cases exist . in one case , the acs acquires the cpe function configuration information from the specified server and then configures the cpe according to the acquired information . in the other case , the acs does not have to acquire the cpe configuration information from the specified server . the acs instructs the specified server to perform corresponding processing according to the acquired cpe configuration information and then configures the cpe according to the processing result of the specified server . it can be seen that , the acs configures the cpe according to the cpe function configuration information in both cases . therefore , compared with the conventional art in which the acs configures the cpe only according to the acquired cpe parameter model information ( that is , the parameter name and read - write attribute of the supported parameter model ), the embodiment of the present invention has a lower error probability . when the server is a specified server , the upload command specified in tr069 may be used to implement the preceding method . because the upload command specified in tr069 includes a “ filetype ” parameter , a “ url ” parameter , a “ username ” parameter , and a “ password ” parameter . the acs sends the upload command to the cpe . the cpe uploads corresponding data to the specified server according to the set value of the “ filetype ” parameter in the upload command . the “ url ”, “ username ”, and “ password ” parameters carry the address , login username , and login password of the specified server respectively . the login username corresponds to the login password on a one - to - one basis . as specified in tr069 , the “ filetype ” parameter can be set to “ 1 vendor configuration file ” or “ 2 vendor log file ”. when the “ filetype ” parameter is set to “ 1 vendor configuration file ”, it indicates that the cpe needs to upload the file that records user configuration information to the specified server . the user configuration information includes user - related information such as the username and password , or includes certain function parameters configured by a user such as relevant configuration information of the dynamic host configuration protocol ( dhcp ) or wireless local area network ( wlan ). when the “ filetype ” parameter is set to “ 2 vendor log file ”, it indicates that the cpe needs to upload the file that records user operation logs to the specified server . in the embodiment of the present invention , a set value is added to the set values of the “ filetype ” parameter . the added set value indicates that the cpe needs to upload the supported parameter type and / or the parameter value range . the value name complies with the naming rule of set value of the “ filetype ” parameter specified in tr069 , such as “ 3 xml schema file ” or others like “ 4 xml schema file ” or “ 3 xml file ”. the naming rule is as follows : integer + space + file type description . fig4 shows a flowchart of a method for acquiring the parameter model supported by the cpe via the upload command . the method includes the following steps : step 401 : the cpe sets up a cwmp session with the acs . step 402 : the acs sends the upload command to the cpe . in the upload command , the “ filetype ” parameter is set to “ 3 xml schema file ”. “ 3 xml schema file ” indicates that the cpe needs to upload the supported parameter type and / or the parameter value range . step 403 : after receiving the command , the cpe returns an uploadresonse message to the acs , indicating that the upload command is received . step 404 : the cpe logs in to the specified server according to the address , login username , and login password of the specified server in the upload command , and then uploads the supported parameter type and / or the parameter value range to the specified server through a file . the preceding steps implement the function that the cpe uploads the supported parameter type and / or the parameter value range to a specified server . to implement the function of configuring the cpe , the method further includes the following steps : step 405 : the cpe sends a transfercomplete message to the acs , indicating that the parameter type supported by the cpe and / or the parameter value range are / is uploaded to the specified server through a file . step 406 : the acs returns a transfercompleteresponse message to the cpe , indicating that the transfercomplete message is received . step 407 : after receiving the notification , the acs downloads the parameter type supported by the cpe and / or the parameter value range from the specified server . step 403 , step 405 , and step 406 are specified steps in the upload command . as specified in the upload command , the command receiver needs to return a message to the command sender , indicating that the command is received . when the server is the acs , a command indicating that the cpe needs to upload its supported parameter type and / or the parameter value range may be added to the tr069 rpc method . the command may be named getcpexmlschemafile or other names by other naming rules , such as getcpexmlfile . the command may also be named by extending the existing rpc method . for example , the getparameternames rpc method may be extended by extending a parameter indicating the parameter type and / or the parameter value range in the getparameternamesresponse message . the specific naming rule or the specific rpc method for extension may be decided by a technical person . the technical person only need to specify the function of the command in corresponding configuration . as shown in fig5 , the method includes the following steps : step 501 : the cpe sets up a cwmp session with the acs . step 502 : the acs sends a getcpexmlschemafile command to the cpe . the getcpexmlschemafile command indicates that the cpe needs to upload the supported parameter type and / or the parameter value range . step 503 : after receiving the command , the cpe uploads the parameter type supported by the cpe and / or the parameter value range as a packet in a getcpexmlschemafileresponse message to the acs . when the cpe function configuration information is a function configuration method supported by the cpe , the flowchart of the method is shown in fig6 . the function configuration method supported by the cpe records the parameters supported by the cpe which need to be configured and the configuration processes when a function of the cpe is implemented . after acquiring the function configuration method supported by the cpe , the acs can configure the terminal according to the configuration process recorded in the function configuration method . thus , the error probability in configuring terminal services is decreased . the method includes the following steps : step 601 : the cpe sets up a cwmp session with the acs . step 602 : the acs sends a command to the cpe to request the cpe to upload the function configuration method supported by the cpe . step 603 : after receiving the command , the cpe uploads the supported function configuration method to the server . the server in step 603 may be a specified server or the acs . when the server is a specified server , the upload command specified in tr069 may be used to implement the method for acquiring the function configuration method supported by the cpe . in the embodiment of the present invention , a set value is added to the set values of the “ filetype ” parameter . the added set value indicates that the cpe needs to upload the function configuration method supported by the cpe . the name of the set value complies with the naming rule for set value of the “ filetype ” parameter specified in tr069 , such as “ 4 operation file ” or others like “ 3 operation file ” or “ 4 configuration file ”. fig7 shows a flowchart of a method for acquiring the function configuration method supported by the cpe via the upload command . the method includes the following steps : step 701 : the cpe sets up a cwmp session with the acs . step 702 : the acs sends the upload command to the cpe . in the command , the set value of the “ filetype ” parameter is “ 4 operation file ”. “ 4 operation file ” indicates that the cpe needs to upload the function configuration method supported by the cpe . step 703 : the cpe returns an uploadresponse message to the acs , indicating that the upload command is received . step 704 : the cpe logs in to the specified server according to the address , login username , and login password of the specified server carried in the upload command , and then uploads the supported function configuration method to the specified server through a file . the preceding steps implement the cpe uploading the function configuration method supported by the cpe to a specified server . to implement configuring the cpe , the method further includes the following steps : step 705 : the cpe sends a transfercomplete message to the acs , indicating the function configuration method supported by the cpe is uploaded to the specified server . step 706 : the acs returns a transfercompleteresponse message to the cpe , indicating that the transfercomplete message is received . step 707 : the acs acquires the function configuration method supported by the cpe from the specified server and configures the cpe according to the acquired method . step 703 , step 705 , and step 706 are specified steps in the upload command . as specified in the upload command , the command receiver needs to return a message to the command sender , indicating that the command is received . when the server is the acs , a command indicating that the cpe needs to upload the function configuration method supported by the cpe may be added to the tr069 rpc method . the command may be named getcpeoperationfile or others such as getcpeconfigrationfile . the command may also be named by extending the existing rpc method . for example , the getparameternames rpc method may be extended by extending a parameter indicating the function configuration method in the getparameternamesresponse message . the specific naming rule or the specific rpc method for extension is decided by a technical person . the technical person only need to specify the function of the command in corresponding configuration . as shown in fig8 , the method includes the following steps : step 801 : the cpe sets up a cwmp session with the acs . step 802 : the acs sends a getcpeoperationfile command to the cpe . step 803 : after receiving the command , the cpe uploads the function configuration method supported by the cpe as a packet in a getcpeoperationresponse message to the acs . ordinary technical person in this field may understand that all or part of the steps in the preceding method embodiments may be implemented by hardware following instructions of a program . the program may be stored in a computer readable storage medium such as a read - only memory ( rom ), a random access memory ( ram ), a magnetic disk or a compact disk . an embodiment of the present invention provides an acs , as shown in fig9 . the acs includes a session requesting unit 901 and a signaling sending unit 902 . the session requesting unit is configured to : send a request for setting up a cwmp session to the cpe , receive a request response message from the cpe , set up a cwmp session with the cpe , and notify the signaling sending unit that the cwmp session has been set up after the cwmp session is set up . the signaling sending unit is configured to send a command to the cpe to request the cpe to upload the cpe function configuration information to a server after receiving the notification sent from the session requesting unit . the acs further includes a function configuration information acquiring unit 903 , a function configuration information storing unit 904 , and a function configuring unit 905 . the function configuration information acquiring unit is configured to acquire the cpe function configuration information that is uploaded to the server and send the information to the function configuration information storing unit . the function configuration information storing unit is configured to store the cpe function configuration information . the function configuring unit is configured to configure the cpe according to the cpe function configuration information stored in the function configuration information storing unit . an embodiment of the present invention provides a cpe , as shown in fig1 . the cpe includes a session negotiating unit 010 , a signaling parsing unit 011 , a function configuration information storing unit 012 , and a function configuration information uploading unit 013 . the function configuration information storing unit is configured to store the cpe function configuration information . the session negotiating unit is configured to : receive a request for setting up a cwmp session from the acs , send a request response message to the acs , and set up a cwmp session with the acs . the signaling parsing unit is configured to : receive a command sent from the acs requesting the cpe to upload the cpe function configuration information to a server , and notify the function configuration information uploading unit to upload the cpe function configuration information stored in the function configuration information storing unit to the server . the function configuration information uploading unit is configured to : receive the notification sent from the signaling parsing unit and upload the cpe function configuration information stored in the function configuration information storing unit to the server . an embodiment of the present invention also provides a terminal configuration system , as shown in fig1 . the terminal configuration system includes an acs 110 , a cpe 111 , and a server 112 . the acs is configured to : send a request for setting up a cwmp session to the cpe , receive a request response message sent from the cpe , set up a cwmp session with the cpe , and send a command to the cpe to request the cpe to upload cpe function configuration information to the server . the cpe is configured to : receive a request for setting up a cwmp session from the acs , send a request response message to the acs , set up a cwmp session with the acs , receive a command sent from the acs requesting the cpe to upload cpe function configuration information to a server , and upload the cpe function configuration information stored in the cpe to the server . the server is configured to receive and store the cpe function configuration information uploaded by the cpe . in the preceding embodiments of the present invention , the acs is further configured to acquire cpe function configuration information from the server and configure the cpe according to the acquired cpe function configuration information . detailed introduction is given to a method , apparatus , and system for acquiring cpe function configuration information in embodiments of the present invention . specific examples are given to describe principles and implementation of the present invention . the embodiments are intended to help the understanding of the methods and core ideas of the present invention , and not intended to limit the present invention . it is apparent that those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention .