Abstract:
The present invention provides a system for intermediating between client nodes and pools of server nodes in an NGN network where the server nodes provide network services to client nodes, wherein the client nodes use various communication protocols and at least part of said communication protocols are different from the communication protocol used by the server nodes. The system comprising: a cluster of associated gateway nodes providing an integrated service for the clients nodes, where each gateway provides services of at least one of: translations of request and answers between the client node and a provider server node, load balancing and managing scenario rules. Each gateway comprise: a database of scripts including, scenario rules, routing scripts and associated transformation scripts, an execution processing module for handling events of at least client requests and server answers according to scenario rules.

Description:
BACKGROUND 
     1. Technical Field 
     The present invention relates to the field of data communications services, and more particularly, to NGN network services. 
     2. Discussion of Related Art 
     The known gateway servers which support communication between client nodes and provider server require customization for configuring the gateway for adapting between the different protocols of the client nodes and provider&#39;s server. 
     BRIEF SUMMARY 
     The present invention provides a system for intermediating between client nodes and pools of server nodes in an NGN network where the server nodes provide network services to client nodes, wherein the client nodes use various communication protocols and at least part of said communication protocols are different from the communication protocol used by the server nodes. 
     The system comprise a cluster of associated gateway nodes providing an integrated service for the clients nodes, where each gateway provides services of at least one of: translations of request and answers between the client node and a provider server node, load balancing and managing scenario rules. Each gateway comprise: a database of scripts including, scenario rules, routing scripts and associated transformation scripts, an execution processing module for handling events of at least client requests and server answers according to scenario rules. The module including: a routing manager for selecting the appropriate routing script for the incoming messages or answers from the servers by selecting at least routing script according to the request properties, client profile and session history, where the selected routing script determines the destination server or pools of servers, a transformation manager for selecting the appropriate transformation script for the incoming messages or answers according to the selected routing script, the request properties, client profile and information of session history, and a scenario manager for applying scenario rules on incoming requests and the received answers for generating new subsequence requests derived from clients original requests and received answers. 
     The handling of the clients requests and generated subsequence request includes activating rules of the selected scripts for transforming sequence of incoming user requests into sequence of transformed requests adapted to destination server communication protocols and transforming sequence of answers coming from the server into sequence of transformed answers adapted to clients nodes communication protocols, where the sequence of incoming user requests or answers includes consecutive client requests or answers having a correlated context. 
     According to some embodiments of the present invention the scenario rules may define analyzing the requests content and properties for deriving new subsequence requests or answers which perform actions for completing the execution of the original client request. 
     According to some embodiments of the present invention The scenario rules define analyzing the requests or answers content and properties for deriving new subsequence equivalent requests which are transmitted in parallel to different servers.
         According to some embodiments of the present invention the gateway nodes can be interconnected through peer to peer connections.   According to some embodiments of the present invention The sequence of requests can be correlated context is a single session flow.   According to some embodiments of the present invention the selection of the routing scripts and the transformation scripts is preformed by checking at least part of the transformation scripts and checking at least part of the routing scripts.   According to some embodiments of the present invention the execution processing module further handles timeout events, error events, and maintenance events.   According to some embodiments of the present invention the database structure is hierarchical and each routing script is related to a plurality of transformation scripts and each scenario rule is related to plurality of routing scripts.   The present invention provides a method for intermediating between client node and pools of server nodes in an NGN network where the server nodes provide network services to client nodes, wherein the client nodes use various communication protocols, wherein at least part of said communication protocols are different from the communication protocol used by the server nodes. The method comprise the following steps; receiving incoming requests from client nodes, temporarily recording sequence of incoming requests having correlated context, generating subsequent derived requests by analyzing the received incoming request from the client according to scenario rules, selecting the appropriate routing script for each message according to request properties, client profile and session history, determining the destination pool of servers of at least one server according to selected routing script, selecting the appropriate transformation script for each message according to the selected routing script, the request properties, client profile and session history, identifying end of client request sequence according context of requests; activating rules of the selected scripts for transforming sequence of incoming user requests into sequence of transformed requests adapted to destination servers communication protocols, where the sequence of incoming user requests are consecutive client requests having a correlated context, sending transformed requests to destination servers; receiving answers from servers, temporarily recording sequence of received answers related to a correlated context, applying selected transformation script to adapt recorded sequence answers related to a correlated context, to the client node protocol and analyzing answers according to scenarios rules, for generating new subsequent request or activating originating request utilizing the received answers, sending transformed answers to client nodes,       

     According to some embodiments of the present invention selection of the routing scripts and the transformation scripts is preformed by checking at least part of the transformation scripts and checking at least part of the routing scripts.
         According to some embodiments of the present invention the sequence of requests or answers are related to a single session flow.   According to some embodiments of the present invention the scenario rules define analyzing the requests content and properties for deriving new serial subsequence requests which perform actions for completing the execution of the original client request.   According to some embodiments of the present invention the scenario rules define analyzing the requests content and properties for deriving parallel new subsequence equivalent requests which are transmitted in parallel to different destination servers.   According to some embodiments of the present invention, at least part of the scenario rules define deriving new serial subsequence equivalent requests which are transmitted in parallel to different destination servers.   According to some embodiments of the present invention the scenario rules enable deriving parallel new subsequence equivalent requests originated from serial subsequence request, said parallel requests are transmitted simultaneously to different destination servers.   According to some embodiments of the present invention at least some of the requests are originated from the server.       

    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present invention will be more readily understood from the detailed description of embodiments thereof made in conjunction with the accompanying drawings of which: 
         FIG. 1  is a in a overview of environment in which the present invention is practiced according to some embodiments of the invention; 
         FIG. 2  is a block diagram of gateway components according to some embodiments of the invention; 
         FIG. 3  is a flow chart illustrating the method of handling network events according to some embodiments of the invention; 
         FIG. 4  is a flow chart analyzing and handling networks events according to some embodiments of the invention. 
     
    
    
     DETAILED DESCRIPTION 
     Before explaining at least one embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of the components set forth in the following description or illustrated in the drawings. The invention is applicable to other embodiments or of being practiced or carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein is for the purpose of description and should not be regarded as limiting. 
     The present invention discloses a method and system for handling events of an NGN network including requests and answers of client nodes and provider&#39;s servers using gateway servers. 
       FIG. 1  illustrates the environment in which the gateway servers  102  are practiced according to the present invention. The system according to the present invention includes cluster of gateway servers  102  linking between client nodes  104  and a pool of servers  106 . In general, the gateway server  102  handles received client requests, processes the requests to be adapted to a protocol of the destination servers  106  and transmits processed requests to the destination server  106 . Answers received from the provider servers  106  are processed to be adapted to a protocol of the client  104  and the processed answers are transferred back to the client  104 . The gateway server  102  further provides load balancing functionality and analysis of events according to defined scenario rules. The defined scenario rules represent implementation of business rules or policies defined by the system operator. According to some embodiments of the present invention the gateway servers  102  with the cluster are interconnected creating peer to peer network configuration. The gateway servers  102  may function as a single entity distributing the handling and processing of requests between the cluster gateway servers. Each gateway server  102  supports multiple protocols. The pool of servers  106  represents a group of provider servers  106  which share the same network protocol. The gateway server  102  maintains data dictionaries which correspond with the different protocols of clients&#39; nodes and providers&#39; servers. 
       FIG. 2  illustrates the different components and modules of the gateway server  102  according to some embodiments of the present invention. Each gateway server  102  comprises the following components: a script database  200 , execution processing application  210  and network processing module  220 . The script database  200  includes scenario rules  202  (referred to in  FIG. 2  as flow scripts) defining processing rules for processing the requests and answers, each scenario rule may be configured to correspond with a specific network protocol, one or more routing scripts  204  for determining the destination of requests, and/or one or more transformation scripts  206  for translating between client nodes and server node protocols. According to some embodiments of the present invention the script database  200  structure is hierarchal, where each routing script  204  is associated with a plurality of transformation scripts  206 . The execution processing application  210  comprises scenario manager  212  for analyzing incoming requests and answers and determining the rules and flows of actions for handling each event, routing manager  214  for selecting and defining the appropriate routing script  204  and transformation module  216  for selecting the appropriate transformation script  206  for adapting the incoming messages or answers to the destination or server node protocol. The execution processing component  210  further handles timeout events, error events, and maintenance events. Network processing module  220  comprises protocol adapter server module  222  for transforming the incoming client requests to the destination server protocol according to a determined transformation script  206 , and client protocol adapter module  224  for transforming the incoming answers to the requesting client protocol according to the determined transformation script  206 . 
       FIG. 3  illustrates the flowchart of handling events according to some embodiments of the present invention. The events received at the gateway server  102  mainly include client requests received in step  302  and answers received from the provider servers  106  in step  320 . The received requests are analyzed in step  304  according to one or more of the predefined scenario rules  202 , which can be defined to generate one or more new subsequent requests in step  306  (as further described in  FIG. 4 ) and define the flow of actions for handling the client requests. All the request including original client requests and subsequent requests are recorded in step  308  in a temporary cache list including sequence of the requests. The recorded requests are analyzed for selection of at least one routing script  204  in step  310 , determining the routing destination in step  314 , and selecting the transformation script in step  316 . The temporary list of requests sequence is maintained as long as the requests have a correlated context, for example all requests are within the same communication session of a client  104 . Once the system indentified in step  309  that the group of correlated requests has ended, e.g., end of session, the sequence of requests are transformed into a sequence of requests adapted to the protocol of the determined destination server  106  or pool of servers  106  in step  313 . Once the transformed requests are prepared, they are transferred to the destination servers  106  in step  313 . At this stage the gateway server  102  awaits the provider servers&#39; answers, in case a predefined time has lapsed the (time out expired) as determined in step  315 , a non response event is generated in step  336  by the gateway server  102  and transferred to the client  104  in step  330 . The gateway server  102  receives events of answers from the provider servers  106  in step  320  and aggregates the answers into a temporary list of answers in step  322 . Once the getaway server  102  identifies the end of correlated answers in step  334 , the getaway server  102  applies the selected transformation script  206  to adapt the sequence of answers to the protocol associated with the client  104 . The received answers are further analyzed according to one or more scenario rules  202  in step  322 , the scenario rules  202  may determine new subsequent requests are to be generated or the original request of the client  104  is to be activated in step  324 . For example if the answers from the server  106  require additional information to be supplied, such as location information, a new subsequent request is generated for receiving the required information. The new subsequent requests are processed in the same manner as original client&#39;s requests are processed. 
     The transformed answers are transmitted to the client  330 . 
       FIG. 4  illustrates the process of analyzing the client requests and answers according to one or more scenario rules  202 . The client&#39;s requests are analyzed according to the scenario rules in step  400  for enhancing the process of handling the requests. One type of such analysis enables parallel subsequent requests to be generated which are equivalent to the original client&#39;s request in step  402 , the multiple subsequent requests are transmitted to several servers  106  simultaneously in step  406 . The gateway server  102  handles the receiving of the multiple answers from the servers in step  410 , and selects the answers from the server  106  which replied in minimum time in step  412 . Such method can improve the timing of responding to user requests by the gateway server  102  to the client  104 . 
     Another analysis type of the requests of the scenario rules  202  may identify the need to generate new subsequent requests for performing actions which are required for completing the original client requests. For example the scenario rule  202  may identify that for completing the client request, the user account must be checked before authorizing the request. In such case a new subsequent request for retrieving user account status is generated. The new subsequent request is transmitted to the respective server  106 , the received responses are analyzed by the gateway server  102  in step  408 . Following our example of checking user account, the received response of the server  106  of user account status is analyzed. In case of positive results, the original request of the user is reactivated and transmitted to the selected destination server  106 . Other types of businesses rule analysis may generate one or more new subsequent requests required to complete received answers from the server  106  in step  414 , for example location based client requests require one or more subsequent to be generated in order to retrieve location information for completing the server answer. 
     The two types of business rules analysis may be combined, generating parallel requests of new generated subsequence requests or generating new subsequent requests for new parallel requests. 
     In the above description, an embodiment is an example or implementation of the inventions. The various appearances of “one embodiment,” “an embodiment” or “some embodiments” do not necessarily all refer to the same embodiments. 
     Although various features of the invention may be described in the context of a single embodiment, the features may also be provided separately or in any suitable combination. Conversely, although the invention may be described herein in the context of separate embodiments for clarity, the invention may also be implemented in a single embodiment. 
     Reference in the specification to “some embodiments”, “an embodiment”, “one embodiment” or “other embodiments” means that a particular feature, structure, or characteristic described in connection with the embodiments is included in at least some embodiments, but not necessarily all embodiments, of the inventions. 
     It is to be understood that the phraseology and terminology employed herein is not to be construed as limiting and are for descriptive purpose only. 
     The principles and uses of the teachings of the present invention may be better understood with reference to the accompanying description, figures and examples. 
     It is to be understood that the details set forth herein do not construe a limitation to an application of the invention. 
     Furthermore, it is to be understood that the invention can be carried out or practiced in various ways and that the invention can be implemented in embodiments other than the ones outlined in the description above. 
     It is to be understood that the terms “including”, “comprising”, “consisting” and grammatical variants thereof do not preclude the addition of one or more components, features, steps, or integers or groups thereof and that the terms are to be construed as specifying components, features, steps or integers. 
     If the specification or claims refer to “an additional” element, that does not preclude there being more than one of the additional element. 
     It is to be understood that where the claims or specification refer to “a” or “an” element, such reference is not to be construed that there is only one of that element. 
     It is to be understood that where the specification states that a component, feature, structure, or characteristic “may”, “might”, “can” or “could” be included, that particular component, feature, structure, or characteristic is not required to be included. 
     Where applicable, although state diagrams, flow diagrams or both may be used to describe embodiments, the invention is not limited to those diagrams or to the corresponding descriptions. For example, flow need not move through each illustrated box or state, or in exactly the same order as illustrated and described. 
     Methods of the present invention may be implemented by performing or completing manually, automatically, or a combination thereof, selected steps or tasks. 
     The term “method” may refer to manners, means, techniques and procedures for accomplishing a given task including, but not limited to, those manners, means, techniques and procedures either known to, or readily developed from known manners, means, techniques and procedures by practitioners of the art to which the invention belongs. 
     The descriptions, examples, methods and materials presented in the claims and the specification are not to be construed as limiting but rather as illustrative only. 
     Meanings of technical and scientific terms used herein are to be commonly understood as by one of ordinary skill in the art to which the invention belongs, unless otherwise defined. 
     Any publications, including patents, patent applications and articles, referenced or mentioned in this specification are herein incorporated in their entirety into the specification, to the same extent as if each individual publication was specifically and individually indicated to be incorporated herein. In addition, citation or identification of any reference in the description of some embodiments of the invention shall not be construed as an admission that such reference is available as prior art to the present invention.