KR100256694B1 - Trading apparatus and qos assignment method using the apparatus on distributed system - Google Patents

Abstract

PURPOSE: A trading apparatus in a distributed system and a method for allocating service quality using the apparatus are provided to improve performance of an object-oriented multimedia service, by managing search of an object access reference, and a service offer between objects, and assigning a bandwidth in an operation and a stream access between a server object and a mobile client object. CONSTITUTION: A part(113) for processing an object service access message transmits data of the service quality requested to a part(112) for managing the quality of an object access service, when an object requests the service. The part(113) sends the requested service to a part(111) for trading an object management group. The part(112) receives the data of the service quality from the part(113), and allocates the bandwidth to an object, referring to an object access bandwidth allocation table(112a). The part(111) receives the information of an object service reference from the part(113), and manages the information using an object service reference table(111a).

Description

Trading device in distributed system and service quality allocation method using the device

The present invention constructs a kernel transport network for access between distributed systems based on a conventional communication network to distribute client objects in mobile terminals and server objects existing in a wired communication network in a distributed system environment. The present invention relates to a trading apparatus in a distributed system connected to a system and a method of assigning a quality of service (QoS) using the apparatus.

In general, in order to provide various multimedia services in an object-oriented distributed system, a kernel delivery network that transfers signaling messages between objects is configured to exchange signaling messages for call setup, and then audio and video. Provide information. Therefore, the distributed multimedia service requires a connection connection of a signal control operation for call establishment and a service session and a stream connection for transmitting information such as audio and video in a kernel delivery network of a distributed system.

The conventional object-oriented distributed system uses the Transmission Control Protocol / Internet Protocol (TCP / IP) based on the Internet, and uses the Object Management Group Common Object Request Architeture (OMG CORBA). ) Application software such as multimedia is provided through connection between distributed objects according to standard.

However, due to the development of mobile and local area network (LAN) technology and semiconductor technology, portable notebook computers and portable terminals have been widely used to use mobile communication terminals or to move and connect to temporary networks different from the original network. Cases have occurred frequently. Accordingly, standards such as network level mobile protocols and mobile host address allocation have been proposed.

The distributed system basically provides a transparent connection between objects based on network protocols as an object request broker (ORB) protocol on top of TCP / IP. Therefore, an object reference according to a connection of moving objects and a trading function for indicating which host an object service of a distributed system exists are required, and a kernel delivery network or As a communication protocol for stream access, service quality allocation such as bandwidth and service priority for communication channels between objects is required.

In the conventional method of connection between objects, messages are exchanged with a fixed bandwidth when the system is set up when performing operations through an interface between objects by performing an object-to-object connection through a socket mechanism in the TCP layer. There were many problems that could not require a separate bandwidth.

Particularly, in the case of a stream connection such as audio or video, which is real time information, the call is established in the distributed system through a separate path for transmitting the stream information without passing through the distributed system, but the call connection is made in the distributed system. There is a problem in that the function of connecting is operated separately, and a complicated process is required to find the corresponding object in the distributed system according to mutual connection.

In order to solve the above problems, the present invention manages the search of object connection references and service offers between objects for effective connection between objects in distributed systems, and the operation and stream connection between server objects and mobile client objects. The purpose of the present invention is to provide a trading device in a distributed system for improving performance of an object-oriented multimedia service by allocating bandwidth for the service and a method of allocating a quality of service using the device.

1 is a conceptual view of a service offering using a trading function in a general distributed system (Service Offer).

2 is a location configuration diagram of a mobile client object and a server object to which the present invention is applied.

3 is a block diagram of a mobile client object using a trader to which the present invention is applied.

4 is an exemplary view of a trading apparatus according to the present invention.

5 is an embodiment flow diagram for an object quality of service (QoS) allocation procedure in accordance with the present invention.

* Explanation of symbols for the main parts of the drawings

11: trader

12: client object

13: server object

In order to achieve the above object, the apparatus of the present invention transmits a quality of service (QoS) of a requested service to an object access service quality management means when an object requests a service, and manages the other connected service through a trader connection. Object service access message processing means for transmitting to the group trading means; The object access service quality management means for receiving a service quality from the object service message processing means and performing band allocation between connected objects using an object access band allocation table (QoS table); And the object management group trading means for receiving information for object service reference from the object service message processing means and managing the object service reference table.

In the method of the present invention, a method of allocating a quality of service (QoS) according to a mobile client object connection in a distributed system using a trading apparatus, wherein the server object transmits a quality of service message related to the object service and the object connection to a server trader, First step of registering quality; The mobile client object requests the base station trader an object service having a desired bandwidth, receives a quality of service attribute from the server trader of the server object, compares the received object connection attribute with the attribute requested by the mobile client object, and compares the result with the result. Sending to the mobile client object; And a third step of the mobile client object accessing the server object with the quality of service allowed by the base station trader to perform communication between the objects.

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

1 is a conceptual diagram illustrating a service offerer using a trading function in a general distributed system.

When an object is created on the same host in a distributed system environment, the server object 13 registers an object reference with a naming server of the same host. In addition, in order to connect with the client object 12 in other hosts (or communication systems), the object service indicating the interface and operation of the object is registered with the trader 11.

The client object 12 asks the trader 11 whether there is an object service to be connected to connect to a server object 13 outside of the same host, and searches for an object service when the object service exists in the trader 11. In response, the server object 13 receives a location and an object reference to communicate with the client object 12 and the server object 13. In this case, the conventional procedures and functions related to the quality of service such as the bandwidth for the access or the stream connection for the object connection are not performed.

2 is a location configuration diagram of a mobile client object and a server object to which the present invention is applied, where “21” is a mobile base station and a wireless LAN hub, “22” is a mobile terminal, “23” is a wired communication network, and “24” Is a mobile client object, "25" is application software, "26" is a distributed system, "27" is a network protocol, and "28" is a distributed system kernel network.

A distributed system environment is established in the mobile base station and the wireless LAN hub 21, the mobile terminal 22, and the host or network component in the wired communication network 23 so that the distributed system 26 can be operated. In order to communicate between the two networks, the network protocol 27 is used as a separate distributed system kernel network 28.

Bandwidth allocation and service priority between the mobile base station and the wireless LAN hub 21 and the mobile terminal 22 greatly depend on the connection state of the mobile base station and the wireless LAN hub 21 as network connection points. This is significantly different from the case where the user receives a service as needed, which appears in a conventional mobile communication telephone or the like as messages for interaction between distributed systems 26 are exchanged from time to time.

Therefore, in order to maintain the distributed system kernel communication network 28 between the mobile base station and the wireless LAN hub 21 and the mobile terminal 22, each signal channel must be fixedly connected. In the mobile terminal 22, a mobile client object 24 is mainly present, and the mobile client object 24 is connected with a server object 13 existing in a host of the wired communication network 23 through the distributed system kernel communication network 28. Connected to perform a separate function.

3 is a configuration diagram of a mobile client object using a trader to which the present invention is applied, and shows a location of a trader that registers and manages a service quality value when allocating service quality between object accesses and object service registration in a communication network.

The traders 11 exist for each of the sub-networks 231 in the wired communication network 23, and the mutual traders 11 are connected by a link. In addition, the trader 11 also exists in the mobile base station and the wireless LAN hub 21 in each area connected to the mobile terminal 22 and the distributed system kernel communication network 28, and the mobile client object 24 in the mobile terminal 22 is present. Bandwidth is allocated according to the capacity of the mobile base station and the wireless LAN hub 21 by comparing the quality of service required by the < RTI ID = 0.0 >) < / RTI > with the quality of service stored in the object service interface repository in the trader 11.

When the server object 13 executed in the mobile terminal 22 registers the object service, the trader 11 of the mobile base station and the wireless LAN hub 21 correspond to the quality of service required by the mobile client object 24. Register information related to object service.

4 is an exemplary diagram of a trading apparatus according to the present invention, in which "111" is an existing object management group trader, "111a" is an object service reference table, "112" is an object access service quality management function; "112a" indicates an object access band allocation table, and "113" indicates an object service access message processing unit, respectively.

The service provision requested by the mobile client object 24 or the server object 13 is processed by the object service connection message processing unit 113, and a part corresponding to the service quality is transmitted to the object connection service quality management function 112. , The remaining service provision is made in the object management group trader 111 through a trader connection.

Therefore, the conventional trader function is maintained as it is, and only the object service access message processing unit 113 and the object access service quality management function 112 are added to perform effective band allocation between the object accesses. Network resources can be efficiently managed between the mobile base station and the wireless LAN hub 21.

As described above, the present invention adds a service quality request and management function according to an object service registration and request object connection to a conventional trader function, and smoothly connects objects for providing a multimedia service provided in a distributed system environment. In order to efficiently manage network resources by allocating service quality and assigning service quality when requesting operation and stream object access. In addition, the bandwidth and user quality of the object connection between the mobile base station, the wireless LAN hub, and the mobile terminal in which the user accesses the mobile station are predicted in advance, thereby improving the performance of the communication network and the system by adjusting the bandwidth and the user channel.

In addition, the trader has information for object service reference and service quality information of the object connection, so that the network resources according to the connection between distributed objects can be easily identified and moved when the path or bandwidth is allocated between the server object and the mobile client object less. The object may be performed by moving the client object to a server object host or to a mobile base station and a wireless LAN hub node.

FIG. 5 is a flowchart illustrating an object service quality assignment procedure according to the present invention, and illustrates a service quality assignment procedure between a mobile object and a server object existing in a wired communication network through a trader.

First, the quality of service related to the object service and the object connection to the trader 52 in the wired network when the object service registers the quality of service (QoS _trader ) such as the bandwidth required for accessing the object by the server object 51 in the host existing in the wired communication network. A message including an attribute such as (QoS _trader ) is transmitted (501), and a registration is confirmed by receiving a quality of service response message from the trader 52 in the wired network that the server object 51 is registered.

The wired communication network is a large-scale communication network, which is classified locally and functionally according to a host or a network component in which the server object 51 exists to constitute the trader 52. In the wired communication network, a number of traders are established, and the traders interact with each other to exchange information about server objects. Accordingly, the trader 52 existing in the wired communication network manages the object service repository and the object access quality of service (QoS _trader ) for each registered object.

In the case where the registered server object 51 and the client object 54 existing in the mobile terminal are interconnected, the client object 54 existing in the mobile terminal has a desired bandwidth to the mobile base station and the wireless LAN hub trader 53. If an object service is requested by the quality of service (QoS _trader ) (503), the mobile base station and the wireless LAN hub trader 53 will not be able to contact the trader 52 existing in the wired network if there is no server object 51 registered in its area. The message is transmitted (504) to obtain attribute information such as the location of the object service repository and the quality of service (QoS) of the registered object (505). At this time, the mobile base station and the wireless LAN hub trader 53 compare the object connection attribute registered in the server object 51 with the attribute requested by the client object 54.

As a result of the comparison, if the QoS _request1 value requested by the client object 54 of the mobile terminal is less than the QoS _trader of the object service registered in the trader 52 in the wired communication network, the service according to the connection between objects is performed. And service is not available due to deterioration of the system. Accordingly, the mobile base station and the wireless LAN hub trader 53 transmit 506 the result of the object service search to the client object 54 of the mobile terminal as object inaccessible. However, if the attributes of the server object 51 in the registered wired network and the connection attributes such as the quality of service (QoS _request2 ) requested by the client object 54 in the mobile terminal are the same, the quality of service (QoS _trader ) of the registered server object is equal. The connection is allowed (507). Here, the QoS _request2 value is equal to the QoS _trader value.

On the other hand, if the quality of service (QoS _erquest3 ) requested by the client object 54 in the mobile terminal is greater than the quality of service (QoS _trader ) registered in the server object, the quality of service (QoS) that allows bandwidth allocation in network resources between the mobile base station and the mobile terminal. _{At new} ), the mobile base station and wireless LAN hub trader 53 allocates a new bandwidth QoS2 to induce connectivity between objects (508). Here, the QoS _trader value and the QoS _request3 value are larger than the QoS _request1 value and smaller than the QoS _new value.

Binding for the actual inter-object connection requires that the client object 54 in the mobile terminal request the inter-object connection to the server object 51 in the wired network with the quality of service allowed by the mobile base station and the wireless LAN hub trader 53. In operation 509, a permission message is received from a server object 51 in a wired communication network in operation 510, and a stream or operation connection for smooth communication is performed between the objects in operation 511.

When the function execution is completed between the objects, the client object 54 in the mobile terminal or the server object 51 in the wired communication network transmits a message requesting the end of the object connection to each other to complete the connection and the function execution between the objects (512,513). The mobile base station and the wireless network hub trader 53 may recover quality of service resources such as used bandwidth and allocate them to other mobile terminals.

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.

As described above, the present invention saves bandwidth waste between the inside of the satellite communication network, the mobile station, and the mobile terminal by applying a quality of service (QoS) according to each object service operation connection according to an object service connection request through a trader of a distributed system. Efficient management of network resources according to object access, bandwidth allocation of proper object-to-object connection, and service priority processing result in improved distributed system and application service performance.

In addition, as a trader is provided in units of wireless network access area, object access, service offer provision, and distributed system for object service can be easily and hierarchically managed by trader to effectively cope with security and system failure recovery. . In addition, the trader has information for object service reference and quality of service (QoS) information of the object connection, so that the network resources according to the connection between distributed objects can be easily identified, so that if the path or bandwidth between the server object and the mobile client object is allocated less, It is easy to move the client object to a server object host or a mobile base station and a wireless LAN hub node to perform the object.

Claims (5)

An object service access message processing means for transmitting a quality of service (QoS) of the requested service to the object access service quality management means when the object requests a service, and transmitting the other requested service to the object management group trading means connected through a trader connection. ; The object access service quality management means for receiving a service quality from the object service message processing means and performing band allocation between connected objects using an object access band allocation table (QoS table); And The object management group trading means for receiving information for an object service reference from the object service message processing means and managing the object service reference table; Trading device comprising a. A method of allocating a quality of service (QoS) according to a mobile client object connection in a distributed system using a trading device, A first step in which the server object registers the quality of service by sending a quality of service message related to the object service and the object connection to the server trader; The mobile client object requests the base station trader an object service having a desired bandwidth, receives a quality of service attribute from the server trader of the server object, compares the received object connection attribute with the attribute requested by the mobile client object, and compares the result with the result. Sending to the mobile client object; And A third step of the mobile client object accessing the server object with a quality of service permitted by the base station trader to perform communication between the objects; Quality of service assignment method comprising a. The method of claim 2, The first step is, Transmitting, by the server object, a message including an attribute of a quality of service related to an object service and an object connection to the server trader; A fifth step in which the server object receives a response message indicating that the quality of service is registered from the server trader and confirms the registration; Quality of service assignment method comprising a. The method of claim 2 or 3, The second step, A sixth step of the mobile client object requesting the base station trader an object service with a desired quality of service; The base station trader sends a message to the server trader if there is no server object registered in its area; An eighth step of the base station trader comparing the object connection attribute received from the server trader with the service quality information of the registered object and the attribute requested by the mobile client object; A ninth step of denying object access if the quality of service requested by the mobile client object is less than the quality of service of the object service registered in the server trader as a result of the eighth step comparison; A tenth step of allowing access to the registered quality of service if the quality of service requested by the mobile client object is the same as the quality of service of the object service registered in the server trader; And As a result of the eighth step comparison, if the quality of service requested by the mobile client object is greater than the quality of service registered in the server trader, the eleventh step of allocating a new quality of service in the base station trader to allow connection between objects; Quality of service assignment method comprising a. The method of claim 4, wherein The third step, A fourth step of the mobile client object requesting the server object an inter-object connection with a quality of service allowed by the base station trader; A fifth step of the server object transmitting a permission message to the mobile client object to perform an connection between the objects; A sixth step in which the mobile client object or the server object transmits a message requesting termination of object connection when the function is completed between objects; Quality of service assignment method comprising a.

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