KR102107761B1 - Device and method supporting heterogeneous communication systems of user equipment based on service characteristics - Google Patents

Abstract

Disclosed is an apparatus and method for supporting heterogeneous communication systems based on service characteristics.
According to an aspect of the present embodiment, a method of a base station supporting a second communication system of a terminal connected to a first communication system based on a service characteristic comprises: receiving information on whether the second communication system is allowed by the terminal, A process for receiving whether a bearer supporting a service is allowed for a second communication system based on the service characteristics, a process for receiving whether a second communication system is available for the terminal, and whether the terminal is allowed for a second communication system. Decide whether to support the second communication system of the service based on information, whether the bearer supporting the service is allowed on the basis of the service characteristics, and whether the second communication system of the terminal is available. Process, and if it is decided to support the second communication system of the service, the bearer supporting the service is transferred to the second communication system. It includes the step of changing.

Description

DEVICE AND METHOD SUPPORTING HETEROGENEOUS COMMUNICATION SYSTEMS OF USER EQUIPMENT BASED ON SERVICE CHARACTERISTICS}

The present invention relates to an apparatus and method for supporting a heterogeneous communication system of a terminal based on service characteristics.

The content described in this section merely provides background information for the present invention and does not constitute a prior art.

The communication system should support an appropriate level of service quality and mobility in consideration of the service characteristics used by the user. Currently, after the LTE communication system, a 5G (5 generation) communication system for meeting wireless data traffic demand is under development. LTE communication systems have a wide coverage to satisfy coverage requirements, while 5G communication systems have a small coverage to satisfy communication capacity. In this case, the 5G cell may be arranged together with the LTE cell or may be independently arranged. The 5G communication system can be divided into a 5G standalone (SA) communication system and a 5G non-standalone (NSA) communication system depending on whether a service is provided in conjunction with an LTE communication system.

In a 5G NSA communication system in which 5G cells and LTE cells are co-located, a method is proposed in which control data is transmitted through an LTE communication system and user data is transmitted through a 5G communication system. However, according to the proposed method, data transmission speed is fast, but it is important to maintain quality of service, such as voice service, and stability may be a problem in services that require continuous data transmission.

The present embodiment has a main purpose in improving service quality by providing a heterogeneous communication system of a terminal in consideration of service characteristics in a 5G NSA communication system.

According to an aspect of the present embodiment, a method of a base station supporting a second communication system of a terminal connected to a first communication system based on a service characteristic comprises: receiving information on whether the second communication system is allowed by the terminal, A process for receiving whether a bearer supporting a service is allowed for a second communication system based on the service characteristics, a process for receiving whether a second communication system is available for the terminal, and whether the terminal is allowed for a second communication system. Decide whether to support the second communication system of the service based on information, whether the bearer supporting the service is allowed on the basis of the service characteristics, and whether the second communication system of the terminal is available. Process, and if it is decided to support the second communication system of the service, the bearer supporting the service is transferred to the second communication system. It includes the step of changing.

According to another aspect of this embodiment, a base station device supporting a second communication system of a terminal connected to a first communication system based on service characteristics receives information on whether the second communication system is allowed by the terminal, and the service A transceiver for receiving whether a second communication system of a bearer supporting a service is allowed based on a characteristic, and receiving / receiving unit for receiving whether the second communication system of the terminal is available, and information about whether the second communication system of the terminal is allowed Based on the service characteristics, it is determined whether to support the second communication system of the service based on whether the bearer supporting the service is allowed for the second communication system, and whether the second communication system of the terminal is available, , If it is decided to support the second communication system of the service, the bearer supporting the service is changed to the second communication system It is a control unit.

According to another aspect of the present embodiment, a method of a terminal changing a connection from a first communication system to a second communication system based on a characteristic of a service includes a process of requesting a service using the first communication system, 2 determining whether a communication system is available, transmitting the determined information to a base station, generating a bearer supporting the service with the second communication system, and generating the bearer with the second communication system It includes the process of receiving the service through.

According to another aspect of this embodiment, a terminal device that changes a connection from a first communication system to a second communication system based on a characteristic of a service determines whether the second communication system of the terminal is available and determines the service. A supporting bearer is generated with the second communication system, a control unit receiving the service through the second communication system and the generated bearer, and a service is requested using the first communication system. It includes a transceiver for transmitting.

As described above, according to this embodiment, service quality can be improved by providing a heterogeneous communication system of a terminal in consideration of service characteristics.

1 is a view showing a 5G NSA communication system that operates while a 5G communication system coexists with an LTE communication system according to an embodiment of the present disclosure;
FIG. 2 is a diagram illustrating a structure in which a 5G communication system and an LTE communication system support a terminal in a 5G NSA communication system as an example,
3 is a view showing a method for supporting a heterogeneous communication system based on service characteristics according to an embodiment of the present disclosure;
4 is a diagram showing a method of supporting a heterogeneous communication system based on service characteristics according to another embodiment of the present disclosure;
5 is a view showing a method for supporting a heterogeneous communication system based on service characteristics according to another embodiment of the present disclosure;
6 is a diagram illustrating an operation flowchart of an LTE eNB according to the present disclosure,
7 is a view showing an operation flowchart of a terminal according to the present disclosure,
8 is a view showing a configuration of an LTE eNB according to the present disclosure,
9 is a view showing the configuration of a terminal according to the present disclosure.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. It should be noted that in adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing the present invention, when it is determined that detailed descriptions of related well-known configurations or functions may obscure the subject matter of the present invention, detailed descriptions thereof will be omitted.

In addition, in describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term. Throughout the specification, when a part is 'included' or 'equipped' a component, this means that other components may be further included rather than excluded, unless specifically stated to the contrary. . In addition, '… Terms such as "unit" and "module" mean a unit that processes at least one function or operation, and may be implemented by hardware or software or a combination of hardware and software.

One communication system can operate while coexisting with another heterogeneous communication system.

1 is a diagram illustrating a 5G NSA communication system that operates while a 5G communication system coexists with an LTE communication system according to an embodiment of the present disclosure.

According to FIG. 1, cell coverage 110 of the LTE communication system is wide, while cell coverage 120, 130, 140, 150 of the 5G communication system is narrow. For this reason, depending on the cell arrangement, some regions 160 may not receive the support of the 5G communication system.

In the 5G communication system, the data transmission speed is faster than the LTE communication system. However, if the terminal is located in an area not supported by the 5G communication system, the service supported by the 5G communication system may be cut off. Therefore, the LTE communication system is more suitable for a service that prioritizes stability than data transmission speed, and the 5G communication system is more suitable for a service that prioritizes data transmission speed rather than stability. For example, in the case of a voice service, it is not a problem even if a slight delay occurs, but it is suitable to support the LTE communication system as a service with high priority because it causes inconvenience to users when the voice service is disconnected. On the other hand, in the case of web surfing, which is a data service, it is important to download quickly because one page is used for a certain period of time rather than continuously changing web pages. Therefore, a service that prioritizes data transmission speed is more suitable for a 5G communication system than an LTE communication system.

FIG. 2 is a diagram illustrating a structure in which a 5G communication system and an LTE communication system support a terminal in a 5G NSA communication system as an example.

According to the 5G NSA communication system, an LTE communication system (hereinafter referred to as 'LTE') 220 and a 5G NR (new radio) communication system (hereinafter referred to as an EPC (evolved packet core) 240 as a radio access network (RAN)) '5G NR', '5G', or 'NR') 230 may be connected. As described above, LTE has a slow data transmission rate but is stable due to continuity, whereas 5G NR has a fast data transmission rate but is not stable.

If the terminal 210 is able to access both the LTE 220 and the 5G NR 230 and supports both the LTE 220 and the 5G NR 230, the terminal 210 uses the LTE 220 to control data The user data may be transmitted and received using the LTE 220 and / or the 5G NR 230. That is, the control data is transmitted and received from the EPC 240 via the LTE 220 to the terminal 210, and the user data is transmitted from the EPC 240 via the LTE 220 and / or 5G NR 230 to the terminal 210. It can be transmitted and received. At this time, the LTE 220 and the 5G NR 230 may exchange information on user data transmitted to the terminal 210.

In the following embodiments, the terminal connects the LTE communication system to the basic communication system, and may be selectively and additionally connected to the 5G communication system.

3 is a diagram illustrating a method of supporting a heterogeneous communication system based on service characteristics according to an embodiment of the present disclosure.

First, the terminal 301 accesses the communication system to use the service. Specifically, the home location register (HLR) 311 transmits information on the subscriber of the terminal 301 to the mobility management entity (MME) 309 (321). The subscriber information may include information on whether a heterogeneous communication system can be used. For example, the subscriber can selectively use only LTE or both 5G NR and LTE according to a plan.

The MME 309 determines whether the terminal 301 is allowed to connect to the 5G NR based on the information on the subscriber, that is, whether the terminal 301 allows the 5G NR (323).

Thereafter, the MME 309 transmits to the LTE evolved-NodeB (eNB) 303 about whether the determined terminal 301 allows 5G NR, and the LTE eNB 303 determines whether to allow the determined 5G NR. Can be sent to (301) (325). However, if the information on the subscriber is stored in the terminal 301, the LTE eNB 303 may not transmit the determined 5G NR to the terminal 301.

In addition, the MME 309 sets whether to allow 5G NR for each bearer to set a bearer and transmits it to the LTE eNB 303 (327). For example, a bearer type indicating whether 5G NR is allowed for each bearer may be added to the initial context setup message or the E-RAS setup message transmitted by the MME 309 to the LTE eNB 303. The Bearer type may be expressed as 'LTE only (5G NR not allowed)' or '5G NR allowed'. Specifically, when the voice service is supported only by LTE and the QCI (QoS class identifier) of the voice service is 1/2/5, MME 309 sets the bearer type to LTE only for bearers with QCI 1/2/5. Can be set to transmit to the LTE eNB (303). In this case, if the LTE eNB 303 does not add a Bearer type to the Initial context setup message or E-RAS setup message, that is, QCI may determine that 5G NR is allowed for bearers excluding 1/2/5. As another example, the MME 309 may set a 5G NR allowance for a bearer having a QCI of 8/9 as a service other than a voice service and transmit it to the LTE eNB 303. In this case, the LTE eNB 303 may determine LTE only if the bearer type is not added to the Initial context setup message or E-RAS setup message. That is, whether to allow the heterogeneous communication system for the bearer is determined in advance, and the MME 309 can inform only when the communication system is changed. Alternatively, the MME 309 may always transmit the bearer type to the LTE eNB 303 by including the Initial context setup message or E-RAS setup message.

The terminal 301 determines whether 5G NR is available and transmits the result to the LTE eNB 303 (329). Specifically, the terminal 301 considers whether the terminal 301 is in a region supporting 5G NR, whether the terminal 301 is a terminal capable of using 5G NR, and receiving sensitivity, etc., so that the terminal 301 is 5G. It can be determined whether NR is available.

The LTE eNB 303 determines whether the 5G NR determined by the terminal 301 is available and whether the 5G NR is used by the terminal 301 based on information on the subscriber of the terminal 301 (331). ).

If the terminal 301 can use 5G NR, LTE eNB 303 determines whether to use 5G NR for each bearer according to whether 5G NR is allowed for each bearer set by MME 309 (333).

In this case, the UE and the bearer are respectively divided to determine whether to use 5G NR, but the LTE eNB 303 can determine at a time.

The bearer with 5G NR allowed is reset (335). That is, when 5G NR is allowed, the bearer is reset to the terminal 301, a base station of 5G NR, gNB 305, gateway (GW) 307, and MME 309.

Thereafter, the terminal 301 transmits data to a gNR 305 for a bearer allowed 5G NR (337), and a bearer for which 5G NR is not allowed, i.e., a LTE eNB 303 for a bearer allowed LTE only. And transmits (339).

Hereinafter, the same process as in FIG. 3 is indicated using the same identification number, and detailed description is omitted.

4 is a diagram illustrating a method of supporting a heterogeneous communication system based on service characteristics according to another embodiment of the present disclosure.

Specifically, the embodiment described in FIG. 4 is a method of using another parameter that indicates the quality of service (QoS) of a bearer, such as allocation and retention priority (ARP).

The terminal 301 accesses the communication system to use the service. The HLR 311 transmits information about the subscriber of the terminal 301 to the MME 309 (321), and the MME 309 indicates that the terminal 301 is connected to the 5G NR based on the information about the subscriber. Whether to allow, that is, whether to allow 5G NR is determined (323). Thereafter, as to whether the 5G NR of the terminal 301 is allowed, the MME 309 transmits to the LTE eNB 303 and the LTE eNB 303 transmits to the terminal 301 (325).

The MME 309 determines ARP according to whether to allow 5G NR for each bearer (401). The ARP was a parameter that is only involved in bearer creation or rejection, but in this embodiment, it can be further indicated whether 5G NR is allowed. For example, it may be determined whether to allow 5G NR as a priority field in ARP. If the ARP is a value between 0 and 15, it is determined that 5G NR is not allowed, and if the ARP is a value of 16 or more, it can be determined that 5G NR is allowed. Or vice versa.

The MME 309 transmits to the LTE eNB 303 whether to allow 5G NR for each bearer including the determined ARP (403). At this time, the determined ARP may be included in the Initial context setup message or E-RAS setup message.

The terminal 301 determines whether 5G NR is available and transmits the result to the LTE eNB 303 (329), and the LTE eNB 303 determines whether the terminal 301 uses 5G NR ( 331).

If the terminal 301 can use 5G NR, LTE eNB 303 determines whether to use 5G NR for each bearer based on the ARP received from MME 309 (405).

The bearer for which 5G NR is allowed is reset (407). That is, when 5G NR is allowed, a bearer is set to the terminal 301, gNB 305, gateway (GW) 307, and MME 309.

Thereafter, the terminal 301 transmits data to a gNR 305 for a bearer allowed 5G NR (337), and a bearer for which 5G NR is not allowed, i.e., a LTE eNB 303 for a bearer allowed LTE only. And transmits (339).

5 is a diagram for a method of supporting a heterogeneous communication system based on service characteristics according to another embodiment of the present disclosure.

The terminal 301 accesses the communication system to use the service. The HLR 311 transmits information about the subscriber of the terminal 301 to the MME 309 (321), and whether the MME 309 allows 5G NR of the terminal 301 based on the information about the subscriber. Decide for (323).

The MME 309 transmits information on whether the 5G NR is allowed by the terminal 301 and a bearer that the terminal 301 can use to the LTE eNB 303 (511).

Since the terminal 301 uses the LTE communication system as the basic communication system, the LTE eNB 303 first establishes a bearer that is a path for transmitting data with the terminal 301 and the GW 307 (513). That is, the bearer does not use 5G NR.

The terminal 301 receives information on whether to allow 5G NR for each QCI from the management object (MO) server 501 (515).

The LTE eNB 303 determines whether the terminal 301 uses 5G NR (517).

Thereafter, the LTE eNB 303 and the gNB 305 allocate resources for the terminal 301 to use 5G NR (519).

The LTE eNB 303 reconfigures the radio resource control (RRC) and transmits it to the terminal 301 (521). The reconstructed RRC may include a data radio bearer (DRB) ID and a secondary cell (Scell) ID.

The terminal 301 checks the QCI of the received DRB ID (523). The terminal 301 determines whether to use 5G NR based on the QCI of the DRB ID and information on whether to use 5G NR received from MO server 501.

If it is determined that 5G NR is not allowed based on whether the 5G NR for each QCI transmitted from the MO server 501 is used and the DRB ID transmitted from the LTE eNB 303, the UE 301 rejects the use of the 5G NR RRC. Is reconfigured and transmitted to the LTE eNB 303 (525).

6 is a diagram illustrating an operation flowchart of an LTE eNB according to the present disclosure.

The LTE eNB receives information on whether to allow the UE to be connected to the 5G NR, that is, whether to allow the 5G NR (601). The information on whether the terminal 5G NR is allowed may be information determined by the MME based on information on the subscriber of the terminal.

The LTE eNB receives whether to allow a 5G communication system of a bearer supporting the service based on service characteristics (603). The MME may determine whether to allow 5G NR for each bearer to be set. Bearers may be set for each service, and QoS may be set for each bearer.

The LTE eNB receives from the terminal whether the 5G communication system of the terminal is available (605). That is, the terminal determines whether to support the 5G communication system, and if so, whether the 5G communication system can be used, etc., and transmits it to the LTE eNB.

The LTE eNB is based on information on whether the terminal 5G communication system is allowed, based on the service characteristics, whether a bearer supporting the service is allowed on the second communication system, and whether the terminal 5G communication system is available. It is determined whether to support the second communication system of the service (607).

When the LTE eNB decides to support the 5G communication system of the service, the bearer supporting the service is changed to a 5G communication system (609).

In FIG. 6, it is described that the processes 601 to 609 are sequentially executed, but this is merely illustrative of the technical idea of an embodiment of the present invention. In other words, a person having ordinary knowledge in the technical field to which one embodiment of the present invention pertains may execute or change the order described in FIG. 6 without departing from the essential characteristics of one embodiment of the present invention, or one of processes 601 to 609 Since the above process can be applied in various modifications and variations by executing in parallel, FIG. 6 is not limited to the time series order.

7 is a diagram illustrating an operation flowchart of a terminal according to the present disclosure.

The terminal requests a service using an LTE communication system (701). The first communication system may be a communication system already connected to the terminal.

The terminal determines whether a 5G communication system is available (703). In addition, the terminal may determine whether or not the 5G communication system is available periodically or at the request of the LTE eNB.

The terminal transmits the determined information to the LTE eNB (705).

The terminal generates a bearer supporting the service with the 5G communication system (707). Whether to use the 5G communication system can be determined by the LTE eNB, and the terminal can generate the bearer at the request of the LTE eNB. The LTE eNB may determine whether to support the 5G communication system of the terminal based on at least one of QCI, ARP, and EPS.

The terminal receives the service through the 5G communication system and the generated bearer (709).

In FIG. 7, it is described that the processes 701 to 709 are sequentially executed, but this is merely illustrative of the technical idea of an embodiment of the present invention. In other words, a person having ordinary knowledge in the technical field to which one embodiment of the present invention pertains may execute or change the order described in FIG. 6 without departing from the essential characteristics of one embodiment of the present invention, or one of the processes 701 to 709 Since the above process can be applied in various modifications and variations by executing in parallel, FIG. 7 is not limited to the time series order.

Meanwhile, the processes illustrated in FIGS. 6 to 7 may be implemented as computer readable codes on a computer readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data readable by a computer system is stored. That is, the computer readable recording medium includes magnetic storage media (eg, ROM, floppy disk, hard disk, etc.), optical reading media (eg, CD-ROM, DVD, etc.) and carrier waves (eg, the Internet). Storage). The computer-readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

8 is a diagram illustrating a configuration diagram of an LTE eNB according to the present disclosure.

According to FIG. 8, the LTE eNB may include a transceiver unit 801 and a control unit 803. In FIG. 8, the transmission / reception unit 801 and the control unit 803 are described separately, but may be integrated and implemented in one configuration, or a single configuration may be implemented in multiple configurations.

The transmitter / receiver unit 801 of the LTE eNB receives information on whether the terminal 5G communication system is allowed, and receives whether the bearer supporting the service is 5G communication system based on the service characteristics, and the control unit of the LTE eNB 803 receives whether the terminal's 5G communication system is available. The information on whether the terminal 5G NR is allowed may be information determined by the MME based on information on the subscriber of the terminal. The MME may determine whether to allow 5G NR for each bearer to be set.

The control unit 803 of the LTE eNB includes information on whether the terminal can accept the second communication system, whether the bearer supports the service based on the service characteristics, and whether the bearer supports the 5G communication system, and the second communication system of the terminal. It is determined whether to support the 5G communication system of the service based on availability, and when it is decided to support the 5G communication system of the service, the bearer supporting the service is changed to a 5G communication system.

9 is a view showing the configuration of a terminal according to the present disclosure.

According to FIG. 9, the terminal may include a transceiver unit 901 and a control unit 903. In FIG. 9, the transmission / reception unit 901 and the control unit 903 are explained separately, but may be implemented in one configuration or may be implemented in one configuration.

The control unit 903 of the terminal determines whether a 5G communication system of the terminal is available, generates a bearer supporting the service with the 5G communication system, and provides the service through the bearer generated with the 5G communication system. Is supported. In addition, the control unit 903 of the terminal may determine whether or not the 5G communication system is available at the request of the LTE eNB or periodically.

The transceiver 901 of the terminal requests a service using the LTE communication system, and transmits the determined information to the LTE eNB. In addition, the transceiver 901 of the terminal may receive a request of the LTE eNB, and may transmit information according to the request of the LTE eNB.

In the above, LTE and 5G are described as examples of heterogeneous communication systems, but may be applied to other communication systems.

The above description is merely illustrative of the technical idea of the present embodiment, and those skilled in the art to which this embodiment belongs may be capable of various modifications and variations without departing from the essential characteristics of the present embodiment. Therefore, the present embodiments are not intended to limit the technical spirit of the present embodiment, but to explain, and the scope of the technical spirit of the present embodiment is not limited by these embodiments. The protection scope of the present embodiment should be interpreted by the claims below, and all technical spirits within the equivalent range should be interpreted as being included in the scope of the present embodiment.

210: terminal 220: LTE
230: 5G NR 240: EPC
301: UE 303: LTE eNB
305: gNB 307: GW
309: MME 311: HLR

Claims (18)

In the method of the base station supporting the second communication system of the terminal connected to the first communication system based on the service characteristics,
Receiving information on whether the second communication system is allowed by the terminal;
Receiving a first communication system and a second communication system permission of an initially established bearer to support a service;
Receiving the availability of the second communication system of the terminal;
Whether to support the second communication system for the service based on information on whether the terminal is allowed to use the second communication system, whether the bearer is allowed to use the second communication system, and whether the terminal can use the second communication system. The process of determining; And
And determining to support the second communication system for the service, resetting the bearer to the second communication system.
Whether the initially configured bearer is allowed to the second communication system is determined based on the service characteristics,
The information indicating whether the second communication system is allowed is a method of a base station supporting a second communication system of a terminal connected to the first communication system and a first communication system set for each generated bearer. According to claim 1,
The second communication of the terminal connected to the first communication system is characterized in that whether or not the bearer supporting the service based on the service characteristics is allowed based on the quality of service (QoS) class identifier (QCI). The method of the base station supporting the system. According to claim 1,
The base station supporting the second communication system of the terminal connected to the first communication system, characterized in that whether the bearer supporting the service based on the service characteristic allows the second communication system is indicated by an allocation and retention priority (ARP). Way. According to claim 1,
A method of a base station supporting a second communication system of a terminal connected to a first communication system, characterized in that a bearer type is indicated as to whether a bearer supporting the service is allowed based on the service characteristics. According to claim 1,
The first communication system is a long term evolution (LTE) communication system, and the second communication system is a 5G (generation) communication system. The method of a base station supporting a second communication system of a terminal connected to the first communication system, . In the base station apparatus supporting the second communication system of the terminal connected to the first communication system based on the service characteristics,
Receives information on whether the terminal is allowed to the second communication system, supports the service, receives the first communication system and whether the second bearer communication system is initially set, and can use the second communication system of the terminal. A transmitting and receiving unit for receiving whether or not,
Whether to support the second communication system for the service based on information on whether the terminal is allowed to use the second communication system, whether the bearer is allowed to use the second communication system, and whether the terminal can use the second communication system. And a controller configured to reset the bearer to a second communication system when determining to support the second communication system for the service.
Whether the initially configured bearer is allowed to the second communication system is determined based on the service characteristics,
The information indicating whether the second communication system is allowed is a base station device set for each bearer generated by the first communication system. The method of claim 6,
The control unit determines whether to allow a second communication system of a bearer supporting the service based on the service characteristic based on a quality of service (QoS) class identifier (QCI). The method of claim 6,
A base station apparatus characterized in that whether a bearer supporting the service based on the service characteristic allows a second communication system is indicated by an allocation and retention priority (ARP). The method of claim 6,
A base station apparatus characterized in that whether a bearer supporting a second communication system based on the service characteristic is allowed is indicated as a bearer type. The method of claim 6,
The first communication system is a long term evolution (LTE) communication system, and the second communication system is a 5G (generation) communication system. In the terminal method for changing the connection from the first communication system to the second communication system based on the service characteristics,
Requesting a service through the first communication system and an initially established bearer;
Determining whether the second communication system of the terminal is available;
Transmitting the determined information to a base station;
If it is determined to support the second communication system for the service, generating a bearer supporting the service with the second communication system;
And receiving the service through the second communication system and the generated bearer.
Whether to support the second communication system for the service is determined based on whether the initially established bearer allows the second communication system and whether the terminal can use the second communication system,
Whether the initially configured bearer is allowed to the second communication system is determined based on the service characteristics,
The information indicating whether the second communication system is allowed is a method of a terminal that changes a connection from the first communication system and the first communication system that is set for each generated bearer to the second communication system. The method of claim 11,
A method of a terminal changing a connection from a first communication system to a second communication system, characterized in that the bearer supporting the service is determined by the base station based on a quality of service (QoS) class identifier (QCI). . The method of claim 11,
A method of a terminal changing a connection from a first communication system to a second communication system, characterized in that the bearer supporting the service is determined by the base station based on ARP (allocation and retention priority). The method of claim 11,
A method of a terminal changing a connection from a first communication system to a second communication system, characterized in that the bearer supporting the service is determined by the base station based on a bearer type. In the terminal device for changing the connection from the first communication system to the second communication system based on the service characteristics,
It is determined whether the second communication system of the terminal is available, and if it is determined to support the second communication system for the service, a bearer supporting the service is generated with the second communication system, and the second communication system And a control unit supporting the service through the generated bearer.
It includes a transmitting and receiving unit for requesting a service through the first communication system and the bearer that is initially set, and transmitting information that determines whether the second communication system of the terminal is available to the base station,
Whether to support the second communication system for the service is determined based on whether the initially established bearer allows the second communication system and whether the terminal can use the second communication system,
Whether the initially configured bearer is allowed to the second communication system is determined based on the service characteristics,
The information indicating whether the second communication system is allowed is a terminal device that changes a connection from the first communication system and the first communication system set for each generated bearer to the second communication system. The method of claim 15,
The terminal device for changing the connection from the first communication system to the second communication system is characterized in that the bearer supporting the service is determined by the base station based on a quality of service (QoS) class identifier (QCI). The method of claim 15,
A terminal device for changing a connection from a first communication system to a second communication system, characterized in that the bearer supporting the service is determined by the base station based on an allocation and retention priority (ARP). The method of claim 15,
A terminal device for changing a connection from a first communication system to a second communication system, characterized in that the bearer supporting the service is determined by the base station based on a bearer type.

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