KR100767313B1 - Device for providing and managing quality of service in handoff of inter access systems, and method thereof - Google Patents

Abstract

The present invention relates to an apparatus and method for managing and providing a quality of service of heterogeneous manganese handoff.

According to the present invention, an apparatus for providing a service quality of heterogeneous network handoff in a network interworking with a plurality of access systems includes an apparatus for performing a service quality management function for each access system and an apparatus for performing a service quality management function between heterogeneous access systems It includes.

An apparatus performing a service quality management function for each access system manages a service session of a user and a local service quality of an access system, and manages a service quality context of a service session.

An apparatus for performing a service quality management function between heterogeneous access systems performs service quality negotiation and service quality context management of a service session during handoff between heterogeneous access systems, and performs a service quality mapping procedure.

Quality of Service, Quality of Service, Heterogeneous Handoffs

Description

Device for providing and managing quality of service in handoff of inter access systems, and method

1 is a diagram illustrating a network configuration for providing a service quality of heterogeneous network handoff according to an embodiment of the present invention.

FIG. 2 is a block diagram of functional units of an apparatus for managing quality of service between access systems in order to provide quality of service for heterogeneous network handoff according to an embodiment of the present invention.

FIG. 3 is a block diagram illustrating a function-specific block configuration of an apparatus managing service quality for each access system in order to provide a service quality of heterogeneous network handoff according to an embodiment of the present invention.

4 is a diagram illustrating a hierarchical structure of an apparatus for providing a quality of service for heterogeneous manganese handoff according to an embodiment of the present invention.

FIG. 5 is a network diagram illustrating an example of applying an apparatus for providing a service quality of heterogeneous manganese handoff according to the first embodiment of the present invention to the structure (Concept 1) of the 3G Evolution system presented in 3GPP SA WG2.

FIG. 6 is a diagram illustrating an example of applying an apparatus for providing a service quality of heterogeneous manganese handoff according to a second embodiment of the present invention to a structure (Concept 2) of a 3G Evolution system presented in 3GPP SA WG2.

7 is a diagram illustrating a series of procedures for providing a quality of service for heterogeneous manganese handoff according to an embodiment of the present invention.

The present invention relates to an apparatus and a method for managing and providing a service quality of heterogeneous network handoff, and more particularly, to a service of a user in a next generation mobile communication system in which a plurality of access systems interoperate. A device and method for managing and providing a service).

Currently, the mobile communication system is a third generation (Generation) based mobile communication system, and the standards are established and developed for 3GPP (Universal Mobile Telecommunications System) and 3GPP2 (CDMA 2000: Code Division Multiple Access 2000). These systems are expected to evolve into 3G Evolution systems in the future.

In addition, a number of wireless communication systems such as a wireless local access network (WLAN) have been developed to provide high-speed data communication services in a specific hot spot area, and digital video broadcasting for digital broadcasting. The system is being commercialized.

With the evolution of these individual wireless and mobile communication systems, the next generation of mobile communication systems is expected to operate in conjunction with these multiple access systems.

Accordingly, a demand for a service using an access system that is more suitable for the characteristics of a service will increase by using a multi-mode terminal including various access functions.

Thus, there is a need for base station and network technologies in mobile communication systems to accommodate this need.

In particular, when a vertical handoff occurs between heterogeneous access systems due to the movement of a mobile terminal in a next-generation mobile communication system, a method of providing a service quality suitable for characteristics of a service and guaranteeing continuity of a session or call in service is provided. Required.

However, no specific technology has yet been proposed for providing quality of service according to handoff in a network interworking with heterogeneous access systems such as next generation mobile communication systems.

Accordingly, an object of the present invention is to provide an apparatus and method for guaranteeing continuity for a session or call in service and managing and providing a service quality suitable for a characteristic of a service when a handoff between heterogeneous access systems occurs. will be.

In order to achieve the above object, the service quality management apparatus according to the characteristics of the present invention,
An apparatus for managing a quality of service (QoS) between heterogeneous access systems, the service quality context for each session of a service provided by a serving access system of the terminal according to a handoff request of a terminal connected to the heterogeneous access system a service quality negotiation manager configured to perform a service quality negotiation for providing a service provided by a serving access system of the terminal in a target access system of the terminal based on context and resource state information of the target access system of the terminal; And an access system interface unit for requesting and receiving the service quality context from the serving access system of the terminal and transmitting the service quality negotiation information performed by the service quality negotiation manager to the target access system of the terminal.

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Service quality management apparatus according to another feature of the present invention,
An apparatus for managing a quality of service for each access system in each access system in association with a quality of service (QoS) managing apparatus between heterogeneous access systems, the apparatus comprising: an interface with a service quality management apparatus between the heterogeneous access systems An interface unit configured to receive a request for quality of service negotiation information for handoff and transmit a response of the quality of service negotiation information; And providing the service quality context and resource state information for each session of the service provided to the terminal according to the request of the service quality negotiation information in cooperation with the interface unit to the service quality management apparatus between the heterogeneous access systems. And a service quality control unit configured to receive service quality negotiation information from a service quality management device between heterogeneous access systems and perform a service session connection with the terminal based on the received service quality negotiation information, wherein the service quality negotiation information includes the heterogeneous access system. Information calculated based on the service quality context and the resource state information provided to the service quality management apparatus.

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An apparatus for providing a quality of service according to a feature of the present invention,
An apparatus for providing a quality of service (QoS) when handoff between heterogeneous access systems is performed, the service quality context for each session of a service provided to an access terminal in each access system for each heterogeneous access system And a first quality of service manager for managing resource status information for each of the access systems; And a second quality of service manager for performing quality of service negotiation for performing the vertical handoff based on the quality of service context and the resource state information provided from the first quality of service management unit according to the vertical handoff request of the terminal. And the first service quality manager performs a service session connection with the terminal based on service quality negotiation information performed by the second service quality manager received from the second service quality manager.

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Service quality providing method according to a feature of the present invention,
A method for providing a quality of service when a device for managing a quality of service (QoS) between heterogeneous access systems is handed off between heterogeneous access systems, the method comprising: (a) a vertical hand of a terminal connected to the heterogeneous access system; Receiving a service quality negotiation request according to the off request; (b) receiving a session quality of service context of a service provided by the serving access system to the terminal from the serving access system of the terminal; (c) receiving resource status information of the target access system from a target access system of the terminal; performing a quality of service negotiation for providing a service provided by the serving access system of the terminal in the target access system of the terminal based on the received quality of service context and the resource state information; And (e) providing the target access system with the result of the quality of service negotiation.

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Service quality providing method according to another feature of the present invention,
A method of providing a Quality of Service (QoS) for each access system when a handoff is made between heterogeneous access systems, the method comprising: (a) a serving access system of a terminal connected to the heterogeneous access system; Transmitting a quality of service negotiation request according to the vertical handoff request of the terminal to a quality management device; (b) transmitting a service quality context for each session of a service provided to the terminal according to a request of a service quality management device between the heterogeneous access systems; (c) receiving a quality of service negotiation response upon completion of the vertical handoff from a service quality management device between the heterogeneous access systems; And (d) releasing a session-specific connection of the service established with the terminal according to the quality of service negotiation response, wherein the quality of service context is provided to the terminal together with resource state information of a target access system of the terminal. It is used for quality of service negotiation for providing a service in the target access system of the terminal.

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Service quality providing method according to a feature of the present invention,
A method of providing a Quality of Service (QoS) for each access system when a handoff is made between heterogeneous access systems, the method comprising: (a) a service between the heterogeneous access systems by a target access system of a terminal connected to the heterogeneous access system; Providing resource status information to a quality management device to perform quality of service negotiation according to the vertical handoff request of the terminal; (b) Service quality negotiation information from the service quality management apparatus between the heterogeneous access systems, wherein the service quality negotiation information includes the resource state information and the session-specific service quality context of a service provided by the serving access system of the terminal to the terminal. Performing pre-work on vertical handoff of the terminal by receiving the information; And (c) connecting a service session with the terminal using the quality of service negotiation information to provide the terminal with the service provided by the serving access system to the terminal.

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DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

In addition, when a part is said to "include" a certain component, this means that it may further include other components, except to exclude other components unless otherwise stated.

In addition, the term module described herein refers to a unit for processing a specific function or operation, which may be implemented in hardware or software, or a combination of hardware and software.

Now, an apparatus and a method for providing a service quality of heterogeneous manganese handoff according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a network configuration for providing a service quality of heterogeneous network handoff according to an embodiment of the present invention.

According to FIG. 1, the network comprises an IP-based core network 22, 24 to which a plurality of heterogeneous access systems 12, 14 interoperate and provide interworking of such access systems.

In this case, AS specific QoS is provided for each access system 12 and 14.

In addition, the multi-mode terminal 100 is a terminal that supports the multi-mode access systems 12 and 14 and performs handover between heterogeneous access systems based on 'make before break' periodically through a heterogeneous access system (AS) search function. Perform the procedure.

In this network, an apparatus for providing a service quality of heterogeneous network handoffs in the network may be an apparatus (Inter-system Access Quality of Setvice Management) (hereinafter referred to as IAQM) 200 for performing a service quality management function between heterogeneous access systems. It includes a device (Access system Quality of Setvice Management, hereinafter referred to as AQM) (300) for performing a service quality management function for each system.

The IAQM 200 is an entity that performs a QoS management function between the access systems 12 and 14, and is responsible for a QoS coordinator function in the core network 22 that interoperates a plurality of access systems. And it controls the interworking between a plurality of AQM (300).

At this time, it is located at the rear of the access system for interworking with each access system, and interworked with the respective access systems 12 and 14 through an IP-based QoS control mechanism (DiffServ / IntServ).

The AQM 300 is an entity that performs a function of managing a quality of service (hereinafter referred to as QoS) of a corresponding access system for each of the access systems 12 and 14 and accesses it in conjunction with a resource manager. It is responsible for the wired and wireless QoS control functions of the system. That is, the access system 12, 14 is controlled by the AQM 300 through its own QoS mechanism.

Hereinafter, the configuration of the IAQM 200 and the AQM 300 will be described in more detail with reference to FIGS. 2 to 4.

FIG. 2 is a block diagram of functional units of an apparatus for managing quality of service between access systems in order to provide quality of service for heterogeneous network handoff according to an embodiment of the present invention. That is, the detailed functional block diagram of the IAQM 200.

According to FIG. 2, the IAQM 200 includes an access system interface 210, a quality of service negotiation manager 220, and a handoff module interface 230.

The access system interface unit 210 performs interfacing with the AQM 300. That is, the service quality context for the service quality negotiation is requested and received from the AQM 300 of the serving access system of the multi-mode terminal 100. Then, the quality of service negotiation information performed by the service quality negotiation manager 220 is transmitted to the AQM 300 of the target access system of the multi-mode terminal 100.

The quality of service negotiation manager 220 performs a quality of service negotiation according to the handoff request of the multi-mode terminal 100. This includes in more detail the quality of service mapping module 222 and the quality of service negotiation module 224.

The service quality mapping module 222 performs service quality mapping in consideration of the service quality context. The quality of service mapping calculates quality of service parameters for each session based on the degree of congestion of the network, quality of service context and resource state information of the target access system.

The service quality negotiation module 224 performs service quality negotiation based on session quality of service information of a service provided by the AQM 300 of the serving access system to the multi-mode terminal 100. The service quality negotiation result is transmitted to the AQM 300 of the target access system of the multi-mode terminal 100 in order to prepare for the handoff.

In this case, the quality of service negotiation module 224 may include the service context manager 224a, the resource status checker 224b, and the handoff preliminary preparer 224c in more detail.

The service context manager 224a requests and receives the quality of service context from the AQM 300 of the serving access system. At this time, the service quality context includes service quality related subscription information and service quality of the user.

The resource status checker 224b requests and receives resource status information from the AQM 300 of the target access system based on the quality of service context.

The handoff preparation device 224c transmits the result of performing the quality of service mapping to the AQM 300 of the target access system to perform the preparation for the handoff.

The handoff module interface unit 230 performs interfacing with the vertical handoff module (VHO). That is, according to the handoff request of the multi-mode terminal 100, a service quality negotiation request including service quality information for each session is received. Then, it is transmitted to the service quality negotiation manager 220 and transmits a response including the service quality information negotiated by the service quality negotiation manager 220.

FIG. 3 is a block diagram illustrating a function-specific block configuration of an apparatus managing service quality for each access system in order to provide a service quality of heterogeneous network handoff according to an embodiment of the present invention. That is, the detailed functional block diagram of the AQM 300.

According to FIG. 3, the AQM 300 includes an interface unit 310 and a service quality management unit 320.

The interface unit 310 is a means for interfacing with the IAQM 200. The interface unit 310 receives a request for information for quality of service negotiation of a handoff and transmits a response thereto. More specifically, the first interface unit 312, the second interface unit 314 and the third interface unit 314 are included.

The first interface unit 312 receives a resource status information request for quality of service negotiation of the handoff and transmits a response thereto, and receives a result of negotiation of quality of service for preliminary preparation of the handoff and transmits a response thereto. do.

The second interface unit 314 transmits the handoff request received from the multi-mode terminal 100 to the vertical handoff module VHO and receives a handoff response for which the quality of service is negotiated.

The third interface unit 314 receives the handoff request from the multi-mode terminal 100, transmits a response thereto, and provides a service to the multi-mode terminal 100.

The service quality management unit 320 manages service session management and service quality information of the multi-mode terminal 100 and provides information requested from the IAQM 200 in cooperation with the interface unit 310.

In more detail, this includes the session management module 322, the quality of service context management module 324, and the resource management module 326.

The session management module 322 manages the service session of the user and the quality of service of the access system. In this case, the session management module 322 may include a handoff processor 322a, a session connection manager 322b, and a session release manager 322c.

The handoff processor 322a performs preliminary work for handoff according to the quality of service negotiation result received from the IAQM 200.

 The session connection manager 322b performs a service session connection with the multi-mode terminal 100 using the service quality negotiation result.

 The session release manager 322c releases the service session according to the handoff of the multi-mode terminal 100.

The service quality context management module 324 manages service quality related subscription information and service quality information. In this case, the quality of service context management module 324 may include a quality of service context storage 324a and a quality of service context manager 324b.

The service quality context store 324a stores service quality related subscription information and service quality information.

The quality of service context manager 324b extracts and provides corresponding information from the quality of service context storage 324a according to the request of the IAQM 200.

The resource management module 326 interoperates with the resource management unit 330 that manages resource allocation of the access systems 12 and 14 and provides resource status information according to a request of the IAQM 200.

4 is a diagram illustrating a hierarchical structure of an apparatus for providing a quality of service for heterogeneous network handoff according to an embodiment of the present invention.

As shown in FIG. 4, the IAQM 200 has a hierarchical relationship with the AQM 300 of a number of access systems 12 and 14 that work together. In this case, the IAQM 200 may interwork with the IAQM 200 of other operators as well as the AQM 300 of the multiple access systems to which the IAQM 200 is linked.

5 to 6 are exemplary embodiments to which the configuration described with reference to FIGS. 1 to 4 is applied.

5 is a network diagram illustrating an example of application to the structure (Concept 1) of the 3G Evolution system presented in the 3GPP SA WG2 according to the first embodiment of the present invention.

According to Figure 5, the network is the structure and interworking structure of the 3GPP Evolution system using the Evolved Packet Core (40).

In other words, PS-Packet-Core of UMTS (Universal mobile telecommunications system) system is evolved and used as Core Network of 3G Evolution system. And the Evolved Radio Access Network (Evolved RAN) 36 using the new access technology, the Serving GPRS Support Node (SGSN) 42 and the WLAN 3GPP IP Access (38) of the existing 3GPP Release 6 systems 32 and 34. ) Has a structure that operates in conjunction with the Evolved Packet Core (40). In this case, the 3GPP Release 6 systems 32 and 34 include a GSM EDGE Radio Access Network (GERAN) 32 and a UMTS Terrestrial Radio Access Network (UTRAN) 34.

Here, the Evolved Packet Core 40 extends the function of the core network of the existing 3GPP GPRS system to perform a function for processing packet data.

In addition, it interworks with a Home Subscriber Server (HSS) 400 that stores user information and a Policy and Charging Rule Function (PCRF) 500 that performs policy and charging functions.

In addition, a service session management function based on Session Initiation Protocol (SIP) / Session Description Protocol (SDP) may be linked with a Call Session Control Function (CSCF) on an Internet Multimedia Subsystem (IMS) 46. Where IMS is Op. It can be PSS besides IMS as IP Serv network.

In the 3G Evolution system, the apparatus 200 for providing QoS in the handover between heterogeneous access systems is located in the Evolved Packet Core 40 to perform QoS management between heterogeneous access systems and QoS management of each access system.

In this case, since the function of the IAQM existing in the Evolved Packet Core plays the role of the GGSN of the existing UMTS system and the core network of the 3G Evolution system, the device 200 includes both the IAQM and the AQM. In other words, IAQM and AQM functions are implemented in one device. In addition, the SIP / SDP protocol procedure is performed using the IMS function existing on the service provider's network for the user's service session control procedure, and the PCRF function is used for the authentication, billing, and policy functions for the session. .

Although the apparatus 200 is not illustrated in the drawings, the functional block configuration with reference to the configuration of FIGS. 2 to 3 corresponds to the first service quality management unit and the IAQM 200, which are configurations corresponding to the AQM 300. The second service quality management unit may be configured.

In this case, the first quality of service manager performs a function of managing a local quality of service for each access system. In more detail, this may be implemented as a session management module and a quality of service context management module.

The session management module manages a service session of the user and the local quality of service.

The service quality context management module manages service quality related information of a service session.

The second service quality management unit performs a service quality management function according to handoff between heterogeneous access systems. In more detail, this may be implemented by a service quality negotiation module and a service quality mapping module.

The service quality negotiation module performs service quality negotiation and service context management of a service session for handoff between heterogeneous access systems.

The quality of service mapping module performs mapping of quality of service according to handoff between heterogeneous access systems.

FIG. 6 is a network diagram illustrating an example of application to the structure (Concept 2) of the 3G Evolution system presented in 3GPP SA WG2 according to the second embodiment of the present invention.

According to FIG. 6, the network maintains the functions of the existing access system and the mobile communication system, and performs a linking function through a new functional entity called Inter-AS MM 58 for interworking of these access systems. Is done. At this time, the Inter-AS MM 58 uses the function of the PCRF 700 for authentication, billing, and policy functions for the session. In addition, Op. As an IP Serv network, it can interwork with an IMS (Internet Multimedia subsystem) 62.

This structure consists of the UMTS (GPRS) system 48, 50, 56 presented in 3GPP, the 3G Evolved Access system 52, and the I-WLAN system 54, which will be standardized in the future, as independent access systems. Inter-AS MM (58) has a structure that interlocks.

 The 3G UMTS (GPRS) systems 48, 50, and 56 operate as one independent access system, and there is an AQM 300 that performs the QoS management functions of the access system to the functions of the GPRS.

In addition, the AQM 300 is also located in the 3G Evolved Access system 52 and the I-WLAN 54 to perform QoS management for each access system.

In addition, for interworking between the plurality of access systems, the IAQM 200 is located in the Inter-AS MM 58 to perform QoS mapping and QoS negotiation functions between heterogeneous access systems.

FIG. 7 is a diagram illustrating a series of procedures for providing quality of service for heterogeneous network handoff according to an embodiment of the present invention, wherein the IAQM 200 and the AQM 300 provide service continuity during handover between heterogeneous access systems. A flowchart illustrating the operation procedure of the.

According to FIG. 7, the multi-mode terminal 100 receives a service through the serving access system (S100).

Next, the multi-mode terminal 100 performs a heterogeneous access system search procedure (S200). At this time, the information of the neighboring access system may be included in the periodic system information of the access system in service and transmitted. In addition, the existence of the heterogeneous access system is recognized through the periodic AS searching procedure or the received system information.

Next, the handoff is determined to the heterogeneous access system using the retrieved access system information (S300). At this time, the handoff is referred to as a vertical handoff.

Next, a handoff request message is transmitted to a handoff module (VHOM) of an Evolved Packet Core or an Inter-AS MM (S400). In this case, the transmission parameter may include information of the found access system and QoS parameter information of the current service.

Next, a QoS negotiation request message is transmitted to the IAQM 200 for the service session in service in the serving access system (S501). In this case, the transmission parameter may include QoS information for each session.

Next, the resource status check of the target access system for handoff is performed (S503). In detail, it requests and receives a quality of service context of a user who has requested a handoff from the serving access system, and requests and receives resource status information from the target access system based on this.

Next, the service quality negotiation and mapping procedure is performed in consideration of the quality of service context and resource state information (S505). In detail, this guarantees the service characteristics for each session in consideration of the degree of congestion of the network, subscriptions related to the quality of service of the user, quality of service information, and resource allocation of the target access system, and QoS parameters for service continuity. To derive

Next, if the step (S505) is successfully performed, the pre-operation for the service session of the terminal to be moved to the target access system side is performed (S507). That is, the service quality negotiation result is notified to the AQM 300 of the target access system to perform preliminary work for handoff. At this time, in advance, the pre-working may be a request and assignment [with HA] and authentication (Authorization / Authentication) procedure of the CoA address when using Mobile IPv4.

Next, a response to the QoS negotiation request message is transmitted to the handoff module (VHOM) for the service session (S509). At this time, the transmission parameter includes a negotiated QoS profile for the requested session.

Next, the handoff module VHOM transmits a handoff response (S600). At this time, the transmission parameter includes the negotiated QoS parameter information.

Next, the multi-mode terminal 100 performs a PHY / MAC Synchronization and registration procedure with the target access system (S700).

Next, the multi-mode terminal 100 performs a channel release and deregistration procedure with the serving access system (S800). At this time, untransmitted service traffic is forwarded to the target access system.

Next, service provision including service traffic not transmitted through the target access system is performed (S900).

The embodiments of the present invention described above are not implemented only through the apparatus and the method, but may be implemented through a program for realizing a function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded. Implementation may be easily implemented by those skilled in the art from the description of the above-described embodiments.

The scope of the present invention is not limited to the above-described embodiments, but various modifications and improvements of those skilled in the art using the basic concept of the present invention as defined in the following claims are also within the scope of the present invention.

As described above, according to the embodiment of the present invention, the service quality guarantee function of the ongoing service and the handover delay during handover between heterogeneous systems are provided.

Claims (27)

An apparatus for managing a quality of service (QoS) between heterogeneous access systems, The terminal is based on a service quality context per session of a service provided by a serving access system of the terminal and resource state information of the target access system of the terminal according to a vertical handoff request of the terminal connected to the heterogeneous access system. A quality of service negotiation manager configured to perform quality of service negotiation for providing a service provided by a serving access system of the terminal in a target access system of the terminal; And An access system interface unit for requesting and receiving the service quality context from the serving access system of the terminal and transmitting service quality negotiation information performed by the service quality negotiation manager to the target access system of the terminal; Quality of service device comprising a. The method of claim 1, The service quality negotiation management unit, A quality of service mapping module for performing quality of service mapping in consideration of the quality of service context; And The target access of the terminal is based on a result of performing the service quality negotiation based on the session quality of service information provided by the serving access system to the terminal and preliminary preparation of the handoff. Quality of service negotiation module sent to the system Quality of service device comprising a. The method of claim 2, The quality of service negotiation module, A service context manager which requests and receives the quality of service context from the serving access system; A resource status checker for requesting and receiving resource status information of the target access system based on the quality of service context; And A handoff preambler that transmits a result of performing the quality of service negotiation to the target access system to perform preliminary preparation of the handoff Quality of service device comprising a. The method according to any one of claims 1 to 3, The quality of service context, And a service quality related subscription information and a service quality of the user of the terminal. The method of claim 4, wherein The service quality mapping module, And a service quality parameter for each session based on a congestion degree of the network, the service quality context, and resource state information of the target access system. The method of claim 5, In response to the handoff request of the terminal, a service quality negotiation request including the service quality information for each session is received and transmitted to the service quality negotiation management unit, and a handoff for transmitting a service quality negotiation response including the service quality negotiation information. Module interface Service quality management device further comprising. An apparatus for managing quality of service for each access system in each access system in association with a quality of service (QoS) management apparatus between heterogeneous access systems, An interface unit for performing an interface with a service quality management device between the heterogeneous access systems to receive a request for quality of service negotiation information for handoff and to transmit a response of the quality of service negotiation information; And The service quality context and resource state information for each session of the service provided to the terminal in response to receiving the request for the service quality negotiation information in connection with the interface unit is provided to the service quality management apparatus between the heterogeneous access systems. A service quality control unit which receives service quality negotiation information from a service quality management device between access systems and performs a service session connection with the terminal based on the received service quality negotiation information; And the service quality negotiation information is information calculated based on the service quality context and the resource state information provided to the service quality management devices between the heterogeneous access systems. The method of claim 7, wherein The service quality control unit, A session management module for managing a service session of a user and a quality of service of an access system; A service quality context management module that manages service quality related subscription information and service quality information; And A resource management module for providing resource status information according to a request of an apparatus for managing quality of service between the heterogeneous access systems in association with a resource manager that manages resource allocation of the access system. Quality of service device comprising a. The method of claim 8, The session management module, A handoff processor that performs preliminary work for the handoff according to a quality of service negotiation result received from the apparatus for managing the quality of service between the heterogeneous access systems; A session connection manager which performs a service session connection with the terminal by using the service quality negotiation result; And Session release manager for performing a service session release with the terminal according to the handoff Quality of service device comprising a. The method of claim 8, The quality of service context management module, A service quality context store for storing the service quality related subscription information and service quality information; And The service quality context manager extracts and provides corresponding information from the service quality context store according to a request of a device for managing quality of service between the heterogeneous access systems. Quality of service device comprising a. The method according to any one of claims 7 to 10, The interface unit, A first interface unit for receiving a request for resource status information for quality of service negotiation of the handoff and transmitting a response thereto, and for receiving a result of negotiation of quality of service for preliminary preparation of the handoff and transmitting a response thereto; A second interface unit for receiving the handoff request for which the quality of service is negotiated for the handoff request received from the terminal; And A third interface unit receiving a handoff request from the terminal, transmitting a handoff response negotiated by the quality of service, and providing a service to the terminal; Quality of service device comprising a. An apparatus for providing a quality of service (QoS) when handoff between heterogeneous access systems is performed, A first quality of service management unit managing service quality context for each session of a service provided to a terminal connected to each access system for each heterogeneous access system and resource state information for each of the access systems; And A second service quality manager configured to perform a quality of service negotiation for performing the vertical handoff based on the service quality context and the resource state information provided from the first quality of service management unit according to the vertical handoff request of the terminal; Including, And a first service quality management unit to establish a service session connection with the terminal based on service quality negotiation information performed by the second service quality management unit received from the second service quality management unit. The method of claim 12, The first service quality management unit, A session management module for managing a service session of the user and the local quality of service; And A service quality context management module that manages service quality related information of the service session. Service quality providing apparatus comprising a. The method of claim 12, The second service quality management unit, A quality of service negotiation module for performing service quality negotiation and service context management of a service session for handoff between the heterogeneous access systems; And Quality of service mapping module for mapping the quality of service according to the handoff between the heterogeneous access system Service quality providing apparatus comprising a. In the method for providing a quality of service (QoS) between the heterogeneous access system when the handoff between the heterogeneous access system, the method for providing the quality of service, (a) receiving a quality of service negotiation request according to a vertical handoff request of a terminal connected to a heterogeneous access system; (b) receiving a session quality of service context of a service provided by the serving access system to the terminal from the serving access system of the terminal; (c) receiving resource status information of the target access system from a target access system of the terminal; performing a quality of service negotiation for providing a service provided by the serving access system of the terminal in the target access system of the terminal based on the received quality of service context and the resource state information; And (e) providing the target access system with the result of the quality of service negotiation performed; Quality of service providing method comprising a. The method of claim 15, In step (b), (Iii) requesting and receiving the service quality information of the terminal requesting the handoff from the serving access system; And (Ii) requesting and receiving resource status information from the target access system based on the received quality of service information; Quality of service providing method comprising a. The method of claim 16, In step (d), And a service quality mapping between the heterogeneous access systems in consideration of the service quality information and the resource state information of the user. The method according to any one of claims 15 to 17, In step (e), (Iii) transmitting a result of negotiation of the quality of service to the target access system for preliminary preparation of handoff according to the quality of service negotiation; And (Ii) providing a profile of the negotiated quality of service to perform the handoff between the access systems; Quality of service providing method comprising a. The method of claim 18, In step (a), And a quality of service negotiation request including quality of service information for each session. In the method of providing a quality of service (QoS) for each access system when the handoff between heterogeneous access systems is made, (a) a serving access system of a terminal connected to the heterogeneous access system, transmitting a quality of service negotiation request according to the vertical handoff request of the terminal to a service quality management device between the heterogeneous access systems; (b) transmitting a service quality context for each session of a service provided to the terminal according to a request of a service quality management device between the heterogeneous access systems; (c) receiving a quality of service negotiation response upon completion of the vertical handoff from a service quality management device between the heterogeneous access systems; And (d) releasing the session-specific connection of the service established with the terminal according to the quality of service negotiation response; The quality of service context is used for quality of service negotiation for providing the service provided to the terminal with the resource state information of the target access system of the terminal in the target access system of the terminal. The method of claim 20, In step (b), And providing a service quality related subscription information and a service quality information request for a service quality negotiation according to the service quality negotiation request. The method of claim 20 or 21, In step (a), Receiving a handoff request determined according to an access system search procedure of the terminal; And Extracting access system search information around the terminal and service quality parameter information of a service provided to the terminal; And Including the extracted information and transmitting a service quality negotiation request according to the handoff request Quality of service providing method comprising a. The method of claim 22, In step (d), (Iii) performing channel release and deregistration of a service session connected with the terminal; And (Ii) forwarding untransmitted service traffic to a target access system requested by the terminal for handoff; Quality of service providing method comprising a. In the method of providing a quality of service (QoS) for each access system when the handoff between heterogeneous access systems is made, (a) providing, by a target access system of a terminal connected to the heterogeneous access system, resource status information for performing a quality of service negotiation according to a vertical handoff request of the terminal to a service quality management device between the heterogeneous access systems; (b) Service quality negotiation information from the service quality management apparatus between the heterogeneous access systems, wherein the service quality negotiation information includes the resource state information and the session-specific service quality context of a service provided by the serving access system of the terminal to the terminal. Performing pre-work on vertical handoff of the terminal by receiving the information; And (c) connecting a service session with the terminal using the quality of service negotiation information to provide the terminal with the service provided by the serving access system to the terminal; Quality of service providing method comprising a. The method of claim 24, In step (a), (Iii) receiving a resource state information request for the quality of service negotiation; And (Ii) determining whether to allocate resources based on service quality related subscription information and service quality information included in the resource status information request; And (Iii) transmitting the response according to the request for resource status information by including the content identified in step (ii). Quality of service providing method comprising a. The method of claim 24 or 25, In step (b), And performing a procedure including address assignment and authentication for connection of a service session according to the handoff. The method of claim 26, Step (c) is, (Iii) performing a service session connection with the terminal; And (Ii) providing a service using the service quality negotiation result including untransmitted service traffic received from the serving access system of the terminal; Quality of service providing method comprising a.

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