KR100228400B1 - A point-to -multipoint connection setting-up and releasing method using a connection graph on open network architecture - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a point-to-multipoint connection establishment and release method using a connection graph in an open communication network.

2. The technical problem to be solved by the invention

The present invention provides a consistent point-to-multipoint operation by effectively managing the connection graph, setting the most optimal connection, and efficiently managing connection properties and shape changes through each object composed of object components in a distributed processing environment. To provide a way to establish and release a connection.

3. Summary of Solution to Invention

The present invention provides a method for establishing and releasing a point-to-multipoint connection in an open communication network, comprising: a first step of establishing a connection using a logical connection graph, a node connection graph, and a physical connection graph in response to a service request; A second step of establishing a branch connection in the existing connection when another user joins the service; And a third step of receiving the release request message for the service to disconnect the transport network.

4. Important uses of the invention

The present invention is used in an open communication network.

Description

How to set and release point-to-multipoint connection using connection graph in open communication network

According to the present invention, when video / audio data for a multimedia service flows on a physical communication network, a point-to-multipoint connection setting is performed using a connection graph in a open communication network where video / audio data flows. And a release method.

The connection graph in the prior art did not have a regular expression form and configuration method for various connection attribute expressions and connection shape expressions for multimedia services. That is, it had only a function of constructing a connection graph in each related object, but there was a difficulty in providing a connection for a multimedia service such as multi-party video conferencing due to the lack of a configuration and method for point-to-multipoint connection.

Therefore, in the present invention, it is possible to effectively manage the connection graph through each object composed of object components on the distributed processing environment, thereby enabling point-to-multipoint connection management, and change the connection characteristics through interworking with service management, It satisfies the connection setting suitable for the quality of service (QoS) of the user, and provides the appropriate information in the transmission network connection management structure through the connection information to establish the most optimal connection and to enable efficient management in changing the connection properties and configuration. The goal is to provide a consistent implementation of point-to-multipoint connections.

1 is a structural diagram related to a connection graph to which the present invention is applied.

2 is a structural diagram relating to a connection relationship between a logical connection graph, a physical connection graph, and a node connection graph to which the present invention is applied.

3 is a block diagram of a system to which the present invention is applied.

4 is a structural diagram related to a logical connection graph to which the present invention is applied.

5 is a structural diagram of a node connection graph to which the present invention is applied.

6 is a structural diagram related to a physical connection graph to which the present invention is applied.

7 is a flowchart of a connection establishment method according to the present invention;

8 is a flowchart of a method for establishing a branch connection according to the present invention.

9 is a flow chart related to a disconnection method according to the present invention.

* Explanation of symbols for main parts of the drawings

301, 305: user terminal A 302, 306: connection management system

303: service management system 304, 307: user terminal B

In order to achieve the above object, the present invention provides a method for establishing and releasing a point-to-multipoint connection in an open communication network, wherein a message for requesting creation of a communication session manager is received from a service session manager in response to a service request. A first step of establishing a connection using the connection graph and the physical connection graph; A second step of establishing a branch connection in an existing connection when a request for creating a branch connection is received from the service session manager when another user joins the service; And a third step of releasing a connection of a delivery network when a communication session manager deletion request message is received from the service session manager.

Hereinafter, with reference to the accompanying drawings will be described an embodiment according to the present invention;

1 shows a structural diagram of a connection graph to which the present invention is applied.

The connection graph 101 is composed of a logical connection graph 102, a physical connection graph 103, and a node connection graph 104. The mapping in the transmission network to the logical connection graph shape is represented by a physical connection graph. The mapping in is represented by the node connection graph.

2 is a structural diagram of a connection relationship between a logical connection graph, a physical connection graph, and a node connection graph to which the present invention is applied.

FIG. 2 is a detailed representation of each connection graph, which is expressed in more detail by adding a representation of a connection point and an end point of the association relationship of FIG. 1. A stream interface 201 represents a video / audio data channel coming out of a video / audio device at each terminal. The stream interface is further subdivided into a set of flow end points, and is divided into a source flow end point and a sink flow end point. The correspondence point for the stream interface's network is the network connection point 202. The network access point corresponds to a network access card (eg, an asynchronous transfer mode (ATM) card) at the terminal. The connection between the stream interfaces in the logical connection graph is a flow connection 203, and the connection between the stream interface and the network connection point in the node connection graph is a nodal connection 204, and the connection between the network connection points The connection is a transport connection 205.

As represented in FIG. 2, when the logical connection graph has two terminal users, it is divided into two node connection graphs and one physical connection graph.

3 is a configuration diagram of a system to which the present invention is applied and shows a system configuration diagram in which each object component in the connection management structure is operated.

The connection management system 302 is a system for controlling and operating a transmission network. Various object components exist in this system, which establishes and releases the connection required for the multimedia service by the user terminal, and manages and maintains the delivery network. The user terminal A 301 and the user terminal B 304 receive the multimedia service through a user application unit object (UAP) that provides the multimedia service. A terminal communication session manager (TCSM) object, which is an object component in the user terminals 305 and 307, plays a role of controlling network resources in the terminal, configures a node connection graph, and connects the connection management system 306. Performs the function of setting / canceling the connection between the user terminal and the delivery network through interworking with the Communication Session Manager (CSM) object. When the object components in the connection management system 306 receive a connection request from a service session manager (SSM) object that performs service control in the service management system 303, a corresponding communication session manager (CSM) After creating a Manager from a Communication Session Manager Factory (CSMF) object, it is provided with an appropriate multimedia connection over a communication network through a Communication Session Manager (CSM) object.

4 is a structural diagram of a logical connection graph to which the present invention is applied.

The logical connection graph 401 has a graph unique name. The name of the graph may have a name associated with a session graph, which is a service control graph, or may have a name representing a service name. The logical connection graph consists of a service user 402 and a flow connection 405. The logical connection graph has information about all service users related to the flow connection, and the stream interface includes information on the stream interface that each service user will use in this logical connection graph. The service user 402 information has a user name and an identifier (Id) for a terminal used by the user. The stream interface 403 has a unique name and can represent data attributes such as audio, video, and text through this name. The stream interface consists of flow endpoints 404. The flow endpoint 404 has directionality (source, sink) and has information about the band of each data. Negotiation is possible according to this information, and other quality of service (QoS) information can be added later. The connection of the flow endpoints in each terminal is a flow connection 405. When more than one sync flow terminal point is connected, it represents a point-to-multipoint connection. The flow connection 405 has bandwidth information according to the band of each flow terminal point and has information about a connection state (reservation, connection, release). The flow end point is divided into a source flow end point 406 and a sink flow end point 407 according to the connection direction, and a network access point (NWAPN: NetWork Access Point) to which each flow end point is connected according to the interworking with the physical connection graph. It has an identifier (Id: Identifier) for.

5 is a structural diagram of a node connection graph to which the present invention is applied.

The node connection graph 501 has a graph name like the logical connection graph. In the node connection graph, information about the stream interface 502 and the flow terminal point 503 which the logical connection graph has are identical. Since each connected graph operates on an independent object, information overlaps depending on the range of expression represented by each graph. Therefore, consistent changes should be made as the information changes. The node connection graph manages a network access point (NWAP) 504. For the node connection 505 connecting each flow terminal point and the network connection point, resource management function for the network connection point should be performed in the object managing the node connection graph. In the network access point 504, a specific channel (Virtual Path Identifier / Virtual Channel Identifier: VPI / VCI: Virtual Path Identifier) as a result of resource allocation according to the node connection and information on the network location to which the UE is connected and bandwidth information. / Virtual Channel Identifier).

6 shows a structural diagram of a physical connection graph to which the present invention is applied.

The physical connection graph 601 has information about a name and has only a representation of the network connection 602, not information about a stream interface or a network connection point. The network connection 602 has a connection consisting of a source network connection point 603 and a sink network connection point 604, and configures point-to-multiple connection when there is more than one sink network connection point 604. Each network access point has information about network location, bandwidth, and specific channel (VPI: Virtual Path Identifier / VCI).

7 is a flowchart illustrating a connection establishment method according to the present invention.

In the open communication structure, each connection graph is implemented and operated as an object component. The service session manager is a service session manager object, which has information about the service session graph corresponding to the connection graph, and delivers the information about the connection and the connection graph required for the service to the connection management object. The service session manager object serves as an object that creates a communication session manager object. The service session manager object is not an object that exists only for all services, but can be configured for each connection according to each service or service characteristics. Multiple communication session managers can be created. The communication session manager acts as an object for information management and control of the logical connection graph, and the service session manager object requests the communication session manager factory (CSMF) object to generate the logical connection graph, that is, the communication session manager object ( 701). The communication session manager factory object receiving this request creates a communication session manager object and a connection coordinator (CC) object having a unique name (702, 703). The communication session manager object constructs a logical connection graph by receiving a logical connection graph configuration request from the service session manager (704), and constructs a node connection graph in the terminal communication session manager 705 and the terminal communication session manager in the terminal participating in the service. (706). The terminal communication session manager object performs information and control about the node connection graph and resource management functions for network resources in the terminal. After the configuration for each connection graph is completed, the service session manager creates a flow connection in the communication session manager (708) and creates a delivery network connection in the connection coordinator (709). The connection coordinator is an object that controls the physical connection graph and configures the physical connection graph according to the request of the communication session manager, and requests the connection on the transport network to the lower network management object and the transport network management object.

8 is a flowchart illustrating a method for establishing a branch connection according to the present invention.

When another user joins the service, you need to establish a branch connection from the existing connection. To this end, the service session manager makes a branch connection creation request 801 to the communication session manager and delivers additional user information. The communication session manager changes the logical connection graph according to this information (802), creates a new terminal communication session manager object with the added user (803), and constructs a node connection graph in the new terminal communication session manager (804). ). The terminal communication session manager objects in the terminal participating in the existing service change the node connection graph configuration in the terminal communication session manager to receive audio / video data from the newly added terminal communication session manager terminal (805). After the graph configuration is changed, the service session manager sends a branch connection request 806 to the communication session manager with information about the branch to be branched. The communication session manager sends a node connection request 807 to the terminal communication session manager objects according to this information, and makes a network connection branch request to the connection coordinator (808). The connection coordinator sends branch connection requests to physical connection graph changes and network management objects according to these requests.

9 is a flowchart illustrating a connection disconnection method according to the present invention.

The service session manager object requests the communication session manager factory object to delete the corresponding communication session manager object in the same manner as the method for creating a communication session manager object (901). The communication session manager factory object having received this request requests the communication session manager object to delete each connection graph (902). The communication session manager object receiving the request message deletes the terminal communication session manager object (903), forwards the node connection graph deletion request, and deletes the connection coordinator object (904). According to the deletion of the node connection graph, the transport network connection is released to the network management object for deletion of the related trail (905).

In the present invention, using the connection graph to represent the connection configuration for the service, the connection graph information is used to perform the connection management in the physical network. The connection graph in the open network structure is constructed by receiving information about the connection from the session graph of the service, and the session graph has overall information about the service.

The connection graph provides a service-oriented view of connectivity, describes the connectivity of multimedia data between users, and is divided into logical connection graphs, node connection graphs, and physical connection graphs. The logical connection graph represents the high level configuration and characteristics of the connection between the service data channels located in the terminal, and the node connection graph represents the connection characteristics and configuration between the service data channel and the network access point in the terminal. The connection graph represents the connection characteristics and configuration between network connection points located at the boundary of the communication network.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains, and the above-described embodiments and accompanying It is not limited to the drawing.

The present invention as described above, by using the connection graph to represent the connection necessary to receive the multimedia service and other services, establish a connection in the delivery network according to this information, and flexibly change the connection change method according to the change of the connection characteristics The connection graph can be expressed through the normalized connection graph required, and this expression technique can efficiently express the attribute and configuration information about the connection, and the connection graph information can be used to connect the network from the service point of view. It has the role of independence on the point of view, and it has the efficiency to control separately from the service control through the control of the independent object that controls the connection graph.

Claims (4)

In the method of establishing and releasing a point-to-multipoint connection in an open network, A first step of establishing a connection using a logical connection graph, a node connection graph, and a physical connection graph when a message requesting the communication session manager generation is received from the service session manager in response to the service request; A second step of establishing a branch connection in an existing connection when a request for creating a branch connection is received from the service session manager when another user joins the service; And A third step of releasing a connection to a delivery network when a communication session manager deletion request message is received from the service session manager; Point to multipoint connection establishment and release method, including. The method of claim 1, The first step is, A fourth step of generating a communication session manager and a connection coordinator when a message requesting creation of the communication session manager is received from the service session manager; A fifth step of constructing the logical connection graph in the communication session manager and generating a terminal communication session manager; A sixth step of configuring the node connection graph in the terminal communication session manager and creating a flow connection in the communication session manager; And A seventh step of generating a node connection in the terminal communication session manager to create a delivery network connection in the connection coordinator; Point-to-multipoint connection establishment method comprising a. The method according to claim 1 or 2, The second step, An eighth step of modifying the logical connection graph configuration in the communication session manager when a request for creating a branch connection is received from the service session manager; A ninth step of creating a new terminal communication session manager with an added user, configuring the node connection graph in the new terminal communication session manager, and changing the graph to receive data information from the newly added terminal; And A tenth step of establishing a branch connection in the flow connection and establishing a node connection in the transport network connection after the graph configuration is changed; Point-to-multipoint connection establishment method comprising a. The method of claim 3, wherein The third step, An eleventh step of receiving a communication session manager deletion request message from the service session manager; And A twelfth step of deleting the terminal communication session manager object by deleting the communication session manager object and releasing a connection network by deleting the connection coordinator object; Point-to-multipoint disconnection method made, including.

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