Abstract:
A service distribution method includes the steps of: firstly generating, by a management system, a corresponding configuration file from service information of a user, and sending the configuration file to an Optical Network Termination (ONT) of the user through an Optical Line Terminal (OLT); and then performing, by the ONT, corresponding configuration in accordance with the configuration file. A service distribution system and a management system are provided. The invention is applied to enable service distribution with good extendibility.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of International Patent Application No. PCT/CN2007/070978, filed on Oct. 29, 2007, which claims priority to Chinese Patent Application No. 200710080120.7, filed on Feb. 12, 2007; both of which are incorporated by reference herein their entireties. 
     FIELD OF THE INVENTION 
     The present invention relates to service distribution technologies in a communication network and in particular to a service distribution method, device and system. 
     BACKGROUND OF THE INVENTION 
     Existing broadband access technologies are primarily divided into copper wire access and optical access technologies. An access network implemented with the optical access technology is referred to as an Optical Access Network (OAN). The Passive Optical Network (PON) technology is an optical access technology for point-to-multipoint transport. 
       FIG. 1  is a schematic diagram of a networking structure of an existing PON system including an Optical Line Terminal (OLT), an Optical Distributed Network (ODN) and an Optical Network Unit (ONU). 
     Specifically, the OLT connected with at least one ODN provides an OAN with a Serial Network Interface (SNI). 
     The ODN is a passive light splitter adapted to transmit downlink data from the OLT to each ONU by light splitting and to transmit uplink data from each ONU to the OLT. 
     The ONU connected with the ODN provides the OAN with a User Network Interface (UNI), and if the ONU also functions as a user port, e.g., an Ethernet user port or a Plain Old Telephone Service (POTS), then the ONU can be referred to as an Optical Network Termination (ONT). The ONU and the ONT will be collectively referred to as the ONT hereinafter unless stated otherwise. 
     An ONU Management Control Interface (OMCI) refers to a mechanism for transporting information between an OLT and an ONT; by configuring a transmission channel through the OMCI, the ONT can be managed and controlled by the OLT. In the OMCI mechanism, various data for management of the ONT by the OLT is extracted as Protocol-Independent Management Information Base (MIB), and a basic information unit of a MIB is a Management Entity (ME). 
     Service distribution refers to an automatic configuration procedure in which an operator initially allocates a number to a user and finally refreshes a service of the user through a service distribution system including an Order System, an Operation Support System (OSS), an Equipment Management System (EMS) and a service equipment. Currently, there are numerous PON technologies, e.g., a Giga-bit Passive Optical Network (GPON), a Broad Band PON (BPON), etc., and the service distribution procedure in the PON system based upon the OMCI mechanism will be described below by way of an example of the GPON system. 
     Firstly, the operator investigates a network to determine physical deployment, installs an equipment and performs corresponding basic configuration in the EMS; then, when a user registers for a service at a business hall, service information of the user is recorded by the OSS system and the EMS is instructed to generate data related to the service information of the user; and finally, the EMS sends the data to the service equipment which accomplishes specific parameter configuration. Except that the configuration at the reception desk of the business hall needs manual intervention, subsequent processes in the procedure are automatically implemented jointly by the equipments of OSS, EMS, OLT, ONT, etc., and this automatically implemented procedure is referred to as service distribution. 
     The OMCI management entity has been functionally improved in the G984.4 standard and subsequent supplementary versions established for GPON technology by the International Telecommunication Union, Telecommunication sector (ITU-T) so that the OMCI can manage value-added services of Voice over IP (VoIP), Circuit Emulation Service (CES), Multimedia over Coax Association (MoCA), etc. A service distribution method for these value-added services is as illustrated in  FIG. 2 . Referring to  FIG. 2 , when a user registers for a service, e.g., the VoIP service, the OSS sends a message of adding the VoIP service for the user to an EMS, the EMS sends all configurations related to the VoIP service by MIB messages of the Simple Network Management Protocol (SNMP) in sequence to an ONT, then an OLT converts these MIB messages into an OMCI management entity message and sends the message to the ONT, and finally the ONT configures specific hardware devices in sequence in the ONT according to the OMCI management entity message. 
     The inventors of this application have identified during making the invention the following drawbacks in the above technical solution: 
     1. There are numerous types of terminals, but only management entities for services such as VoIP, CES, MoCA, etc., have been prescribed in the standard. In the case of a newly added service for which a service distribution is to be performed, an OMCI management entity has to be extended correspondingly for the new service, which may incur a heavy development workload due to the complexity of the OMCI management entity. 
     2. When a new service has been added and the OMCI management entity has been extended correspondingly for the new service, a corresponding OMCI management entity message has to be added, which brings increased difficulty in intercommunication between the equipments of OLT and ONT. 
     3. Any modification of the OMCI management entity involves modifications of numerous parts, as EMS, OLT, ONT, etc., which may be adverse to an extension thereof. 
     Consequently, the above existing service distribution solution has poor extendibility. 
     SUMMARY OF THE INVENTION 
     A service distribution method according to an embodiment of the invention provides a service distribution method with good extendibility. 
     A service distribution system according to an embodiment of the invention provides a service distribution system with good extendibility. 
     A management system according to an embodiment of the invention can provide a service distribution with good extendibility. 
     In order to attain the object, a technical solution of an embodiment of the invention are realized as follows: 
     A service distribution method includes: 
     generating, by a management system, a corresponding configuration file from service information of a user; 
     sending, by the management system, the generated configuration file to an Optical Network Termination, ONT, of the user through an Optical Line Terminal, OLT; and 
     performing, by the ONT, corresponding configuration in accordance with the received configuration file. 
     A service distribution system includes a management system connected with one or more Optical Network Terminations, ONTs, through an Optical Line Terminal, OLT, wherein: 
     the management system is adapted to generate a corresponding configuration file from service information of a user and to send the configuration file to the one or more ONTs through the OLT. 
     A management system connected with one or more Optical Network Terminations, ONTs, through an Optical Line Terminal, OLT, includes 
     a generation module adapted to generate corresponding configuration file from service information of a user; and 
     a sending module adapted to send the configuration file to the OLT which sends the configuration file to the Optical Network Termination, ONT. 
     As can be seen from the above technical solution, in the solution according to the embodiment of the invention, firstly the management system generates a corresponding configuration file from the service information of a user and then sends the configuration file through an OLT to an ONT corresponding to the user, and finally the ONT performs corresponding configuration in accordance with the configuration file, thereby accomplishing service configuration for the ONT by way of the configuration file. Since the configuration file can be extended flexibly, the service configuration information in the configuration file can also be extended flexibly. 
     Furthermore, in the above technical solutions, the OLT can simply transport the configuration file from the management system to the ONT of the user without perceiving the configuration, so the coupling between the management system, the OLT and the ONT can be reduced, thereby also resulting in enhanced extendibility of a service. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic diagram of a networking structure of an existing PON system; 
         FIG. 2  is a schematic diagram of a flow of an existing value-added service distribution method; 
         FIG. 3  is a schematic diagram of a flow of a service distribution method according to an embodiment of the invention; and 
         FIG. 4  is a schematic diagram of a structure of components in a service distribution system according to an embodiment of the invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The invention will be further described in details below with reference to the drawings and the embodiments to make the object, technical solution and advantages of the invention more apparent. 
       FIG. 3  is a schematic diagram of a service distribution method according to an embodiment of the invention. Referring to  FIG. 3 , the method includes the following steps: 
     In the step  301 , the EMS obtains service information of a user. 
     In this step, the EMS may obtain the service information of the user from the OSS, from information input to the EMS by a network administrator or in any other feasible way in the prior art. 
     In the prior art, the EMS can obtain the service information of the user from the OSS based upon a network protocol of TL1, Common Object Request Broker Architecture (CORBA), etc. 
     In the step  302 , the EMS generates a corresponding configuration file from the service information of the user. 
     In this step, in order to facilitate rapid generation of the configuration file for the user, common configuration file templates corresponding to various ONT types can be generated in the EMS according to the ONT types and some common configuration information can be set in these common configuration file templates in advance. Thus, when the user registers for a service, the OSS system or the network administrator can firstly determine the ONT type of the user and then send only personalized configuration information corresponding to the user as the service information of the user to the EMS, and the EMS sets the personalized configuration information of the user in the common configuration file template corresponding to the ONT type of the user and generates the configuration file corresponding to the service information of the user. 
     Here, the common configuration information refers to general configuration information common to the same category of users/ONTs, and personalized configuration information is a concept with respect to common configuration information, e.g., a phone number, a routing manner, etc., of the user, which are configuration information specific to a user or an ONT. 
     In this step, the configuration file generated by the EMS can be in a format of currently popular eXtensible Markup Language (XML) or in another format, e.g., a text file (TXT) format or another self-defined format, provided that the ONT can normally parse the file to obtain configuration data upon receiving the configuration file. 
     In this step, the configuration file generated by the EMS can be stored in the EMS or stored by the EMS into a file server. 
     Here, the file server may be a file server based upon the File Transport Protocol (FTP) or a server based upon the Trivial File Transfer Protocol (TFTP), the SSH File Transfer Protocol (FTPS) or other file transport protocols. 
     In the step  303 , the EMS sends the configuration file to the OLT. 
     In this step, the OLT sends the type of the ONT and the identifier (ID) of the user to the EMS when detecting that the ONT is online, and the EMS determines a configuration file to be sent in accordance with the type of the ONT and the ID of the user. The embodiment provides two methods for sending the configuration file to the OLT after the EMS determines the configuration file to be sent. 
     In the first method, the EMS sends the configuration file directly to the OLT. 
     In the second method, in the step  302 , the EMS stores the generated configuration file in the file server and notifies the OLT about the determined configuration file after determining the configuration file to be sent, the OLT makes a request to the file server for downloading the configuration file, and then the file server sends the configuration file which the OLT requests to download to the OLT. 
     In this step, the information of the type of the ONT, the ID of the user, etc., may be interacted between the EMS and the OLT based on a transportation means in a protocol of SNMP, Telnet, etc., and the configuration files may be transported between the EMS and the OLT or between the file server and the OLT by a transportation means in a protocol of FTP, TFTP or FTPS or in other file transport protocols. 
     In the step  304 , the OLT sends the configuration file to the ONT. 
     In this step, the OLT may send the configuration file to the corresponding ONT through an OMCI file loading channel, details of which can be found in a data loading flow of OMCI in the prior art and will not be described here. 
     In the step  305 , the ONT performs corresponding configuration for hardware in the ONT in accordance with the configuration file. 
     In this step, the ONT parses the configuration file from the OLT to obtain the configuration data corresponding to the service information of the user and performs corresponding configuration for hardware in the ONT in accordance with the configuration data. 
     Thus, the service distribution flow according to the embodiment is finished. 
     The service distribution system is described below by way of a system embodiment of the invention. 
       FIG. 4  is a schematic diagram of a structure of components in the service distribution system according to an embodiment of the invention. Referring to  FIG. 4 , the system includes an OSS, an EMS, an OLT and an ONT. 
     Particularly, the EMS is adapted to generate a corresponding configuration file from service information of a user and to send the configuration file through the OLT to the ONT corresponding to the user. 
     The OLT is adapted to send the received configuration file to the ONT corresponding to the user. 
     The ONT is adapted to perform corresponding configuration for hardware in the ONT in accordance with the configuration file. 
     In the system illustrated in  FIG. 4 , the EMS is further adapted to set a common configuration file template containing common configuration information, which corresponds to the type of the ONT, to set the personalized configuration information of the user as the service information of the user in the common configuration file template corresponding to the ONT type of the user and to generate a configuration file corresponding to the service information of the user. Here, the EMS can obtain the service information of the user from the OSS based upon a network protocol of TL1, CORBA, etc., from information input to the EMS by a network administrator or in any other feasible way in the prior art. 
     In the system illustrated in  FIG. 4 , the OLT can be adapted to detect the ONT and to send the type of the ONT and the ID of the user to the EMS when detecting that the ONT is online, and the EMS determines a configuration file to be sent in accordance with the type of the ONT and the ID of the user. The embodiment provides two methods for sending the configuration file to the OLT after the EMS determines the configuration file to be sent. 
     In the first method, the EMS sends the configuration file directly to the OLT. In this method, the configuration file may be transported between the EMS and the OLT by a transportation means in a protocol of FTP, TFTP, FTPS or in other file transport protocols. 
     In the second method, the system illustrated in  FIG. 4  further includes a file server, so that the EMS stores the generated configuration file in the file server and notifies the OLT after determining the configuration file to be sent, the OLT initiates to the file server a file download request for downloading the configuration file, and then the file server sends the configuration file requested by the OLT to the OLT. In this method, the configuration file may be transported between the file server and the OLT by a transportation means in a protocol of FTP, TFTP, FTPS or in other file transport protocols. 
     The OLT can send the configuration file to the corresponding ONT through an OMCI file loading channel upon receiving the configuration file. 
     In the system illustrated in  FIG. 4 , the EMS may be adapted to generate the configuration file in a format of XML, TXT or other formats. 
     The ONT is adapted to parse the configuration file in the format of XML, TXT or in other formats to obtain configuration data corresponding to the service information of the user and to perform corresponding configuration for hardware in the ONT in accordance with the obtained configuration data. 
     As can be seen from the above embodiments, in the technical solutions of the embodiments of the invention, firstly the EMS generates the corresponding configuration file from the service information of the user and then sends the configuration file through the OLT to the ONT corresponding to the user, and finally the ONT performs corresponding configuration for hardware in the ONT in accordance with the configuration file, thereby accomplishing service configuration for the ONT by way of the configuration file. Since the configuration file may be extended flexibly, the service configuration information in the configuration file may also be extended flexibly. 
     Furthermore, since in the above technical solutions the OLT can simply transport the configuration file from the EMS to the ONT without perceiving the configuration, so the coupling between the equipments of EMS, OLT and ONT may be reduced, thereby also resulting in enhanced extendibility of a service. 
     Additionally, in order to facilitate rapid generation of the configuration file for the user, in the embodiment, common configuration file templates corresponding to different ONT types are set in the EMS, and thus the OSS or the network administrator can simply send the personalized configuration information of the user to the EMS, so that the EMS can generate the configuration file from the personalized configuration information. 
     The foregoing descriptions are merely illustrative of the preferred embodiments of the invention but not intended to limit the scope of the invention. Any modifications, equivalents and adaptations made without departing from the spirit of the invention shall come into the scope of the claims appended to the invention.