KR20150008800A - Electronic device and method for providing communication service - Google Patents

Abstract

An embodiment of the present invention relates to an apparatus and a method for providing an LTE service in an electronic device. According to the embodiment of the present invention, an operating method of the electronic device comprises: a step of deactivating an LTE communications module when the electronic device enters an LTE region not supporting CSFB; a step of checking if system information including LTE network information is received through a legacy network; and a step of activating the LTE communications module when receiving the system information including LTE network information. Other embodiments of the present invention are also feasible.

Description

TECHNICAL FIELD [0001] The present invention relates to an electronic device and a method for providing a communication service,

Various embodiments of the present invention are directed to an apparatus and method for providing Long Term Evolution (LTE) services in an electronic device.

An electronic device providing LTE service can support multi mode in a single radio environment. For example, if multiple modes are supported, the electronic device may support multiple communication systems. For example, when supporting multiple modes in a single wireless environment, the electronic device can transmit and receive RF (Radio Frequency) signals for any one of a plurality of communication systems that are supportable according to the multiple modes. For example, when communication with the base station of the first communication system goes outside the service area of the corresponding base station and enters the service area of the base station of the second communication system, the electronic device switches the serving communication system from the first communication system to the second communication system Thereby providing a communication service.

If multiple modes are supported in a single wireless environment, the electronic device can operate in a Circuit Switched FallBack (CSFB) fashion. For example, when operating in the CSFB scheme, the electronic device can support voice service using a CS (Circuit Switching) network if a PS (Packet Switching) network such as an LTE network does not support voice service. For example, an LTE network may represent a network providing services using an LTE communication system.

As described above, an electronic device supporting multiple modes of a single wireless environment can operate in the CSFB scheme. If an electronic device supporting the CSFB is located in an LTE area that does not support the CSFB, the electronic device can not access the LTE network and perform services (e.g., voice service via the CS network) can do. For example, according to an existing technology (e.g., LTE standard), an electronic device can not activate an LTE communication module until a reboot occurs by power control or a SIM card. Accordingly, even if the electronic device inactivating the LTE communication module enters the LTE network supporting the CSFB, there is a possibility that the LTE service can not be provided through the LTE network.

In addition, if the legacy network linked with the LTE network and CSFB does not support data service or supports voice service and data service at the same time even if data service is supported, the electronic device can not provide data service during voice service . For example, if an electronic device supports a CSFB using a Global System for Mobile communication (GSM) network that does not support an LTE network and a DTM (Dual Transfer Mode), the electronic device may receive a voice call during a data service, If you try to make a call, you can fall back to the GSM network and stop the data service. Accordingly, the user of the electronic device can not use data services such as Multi-media Message Service (MMS) and Rich Communication Suite (RCS) during voice communication.

Various embodiments of the present invention may provide an apparatus and method for providing LTE services in an electronic device.

Various embodiments of the present invention may provide an apparatus and method for providing LTE services in an electronic device supporting CSFB.

Various embodiments of the present invention may provide an apparatus and method for distinguishing an LTE network supporting CSFB from an LTE network not supporting CSFB in an electronic device.

Various embodiments of the present invention may provide an apparatus and method for recognizing an entry into an LTE network that supports CSFB in an electronic device that has disabled the LTE communication module.

Various embodiments of the present invention can provide an apparatus and method for providing LTE services through an electronic device supporting multiple modes of a single wireless environment in an LTE area that does not support CSFB.

Various embodiments of the present invention may provide an apparatus and method for recognizing an entry into an LTE network supporting a CSFB over a combined attach or combined TAU (combined tracking area update) in an electronic device.

Various embodiments of the present invention may provide an apparatus and method for supporting continuous communication services using heterogeneous networks in an electronic device.

According to an embodiment of the present invention, the operation of the electronic device is such that the electronic device is connected to a first LTE area that is an LTE network supporting circuit switched fallback (CSFB) or a second LTE area that is an LTE network that does not support the CSFB And controlling the LTE communication module to support the LTE network based on a result of the determination and a result of the determination, wherein the controlling operation is performed when the electronic device is located in the first LTE area , Activating the LTE communication module and deactivating the LTE communication module if the electronic device is located in the second LTE area.

According to one embodiment of the present invention, an electronic device includes an LTE communication module for providing communication service through an LTE network, at least one communication module for providing communication service through a legacy network, and a circuit switched fallback (CSFB) Based on the result of the determination, whether or not the LTE communication module is located in a first LTE region that is an LTE network supporting the LTE network or an LTE network that does not support the CSFB, Wherein the processor activates the LTE communication module when the electronic device is located in the first LTE area and if the electronic device is located in the second LTE area, Can be deactivated.

According to one embodiment of the present invention, an operation method of an electronic device includes: an operation of deactivating an LTE communication module when entering an LTE area that does not support CSFB; and an operation of disabling the LTE communication module and system information including LTE network information through a legacy network And activating the LTE communication module when receiving the system information and recognizing entry into the LTE area supporting the CSFB.

According to one embodiment of the present invention, an electronic device includes an LTE communication module for providing communication services over an LTE network, one or more communication modules for providing communication services over a legacy network, and an LTE area not supporting the CSFB The LTE communication module is deactivated and receives system information including LTE network information through the legacy network and recognizes entry into an LTE region supporting CSFB, .

According to an embodiment of the present invention, when entering an LTE area that does not support CSFB, an operation method of an electronic device activates a data communication module and a voice communication module to perform LTE data service And a voice service, confirming that system information including LTE network information is received through the legacy network, and, upon receiving the system information and recognizing entry into the LTE area supporting the CSFB, Lt; RTI ID = 0.0 > LTE < / RTI >

According to an embodiment of the present invention, an electronic device includes a data communication module for data service, a voice communication module for voice service, and an LTE area that does not support CSFB, Activates the communication module to provide LTE data service and voice service according to a dual stack scheme, receives system information including LTE network information through the legacy network, and enters into an LTE area supporting CSFB And a processor for controlling the LTE data service and the voice service according to the CSFB scheme using the data communication module and the voice communication module.

According to one embodiment of the present invention, the operation of the electronic device includes transmitting a combined attach or combined TAU (combined tracking area update) when the service area or cell is changed, attach / combine TAU (combined Tracking Area Update), determining whether to enter the LTE region supporting the CSFB based on the response information, and determining whether the LTE region supporting the CSFB , It may include an operation of providing an LTE data service and a voice service according to the CSFB scheme.

According to an embodiment of the present invention, an operation method of an electronic device includes checking whether there is a legacy network capable of simultaneously providing a data service and a voice service in an LTE domain, and, when the legacy network exists, And providing data service or voice service according to a dual stack scheme based on the legacy network.

According to an embodiment of the present invention, when there is a data communication module for data service, a voice communication module for voice service, and a legacy network capable of simultaneously providing data service and voice service in the LTE area, And a processor that provides at least one of a data service or a voice service according to a dual stack scheme based on the network and the legacy network.

According to various embodiments of the present invention, LTE communication using an LTE network can be easily provided by recognizing an entry into an LTE network supporting a CSFB while an LTE communication module is deactivated in an electronic device supporting CSFB have.

According to various embodiments, an electronic device supporting a single wireless environment operates in a dual stack manner in an LTE area that does not support CSFB, so that an electronic device supporting a single wireless environment can be used in an LTE LTE service can be provided in the area.

According to various embodiments, an electronic device supporting a single wireless environment may provide a voice service and a continuous data service by providing a CSFB scheme or a dual stack scheme using a legacy network that simultaneously supports data service and voice service .

According to various embodiments, an electronic device supporting a single wireless environment operates in a dual-stack manner using a legacy network that simultaneously supports data services and voice services in an LTE area supporting CSFB, Can be provided.

1 shows a configuration of a wireless communication system according to an embodiment of the present invention.
2 shows a configuration of a wireless communication system according to an embodiment of the present invention.
3 shows a block diagram of an electronic device according to an embodiment of the present invention.
4 shows a detailed block diagram of a processor according to an embodiment of the present invention.
5 illustrates a procedure for identifying a CSFB region using system information in an electronic device according to an embodiment of the present invention.
6 illustrates a detailed procedure for identifying a CSFB area using system information in an electronic device according to an embodiment of the present invention.
7 illustrates a procedure for identifying a CSFB region using a network identifier in an electronic device according to an embodiment of the present invention.
FIG. 8 illustrates a procedure for identifying a CSBF area using CSFB area indication information in an electronic device according to an exemplary embodiment of the present invention.
FIG. 9 illustrates a procedure for identifying a CSFB region using CSFB network information in an electronic device according to an exemplary embodiment of the present invention.
Fig. 10 shows a block configuration of an electronic device according to an embodiment of the present invention.
11 shows a procedure for providing an LTE service in a non-CSFB area in an electronic device according to an embodiment of the present invention.
12 shows a procedure for providing an LTE service in a non-CSFB area in an electronic device according to an embodiment of the present invention.
13 illustrates a procedure for identifying a CSFB region in an electronic device located in a non-CSFB region according to an embodiment of the present invention.
14 shows a procedure for identifying a CSFB area in an electronic device located in a legacy service area according to an embodiment of the present invention.
15 shows a procedure for identifying a CSFB area in an electronic device located in a legacy service area according to an embodiment of the present invention.
16 illustrates a configuration of a wireless communication system according to an embodiment of the present invention.
17 shows a procedure for providing an LTE service based on a dual stack scheme in an electronic device according to an embodiment of the present invention.
18 shows a procedure for providing an LTE service in an electronic device according to an embodiment of the present invention.
Figure 19 illustrates a procedure for providing communication services based on a dual stack scheme in an electronic device according to an embodiment of the present invention.
Figure 20 illustrates a procedure for providing communication services based on a dual stack approach in an electronic device according to an embodiment of the present invention.
21 shows a procedure for switching from the electronic device to the CSFB scheme according to an embodiment of the present invention.
22 shows a procedure for switching to a dual stack mode in an electronic device according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The various embodiments of the present invention are described below in connection with the accompanying drawings. The various embodiments of the present invention are capable of various changes and may have various embodiments, and specific embodiments are illustrated in the drawings and the detailed description is described with reference to the drawings. It should be understood, however, that it is not intended to limit the various embodiments of the invention to the specific embodiments, but includes all changes and / or equivalents and alternatives falling within the spirit and scope of the various embodiments of the invention. In connection with the description of the drawings, like reference numerals have been used for like elements.

The use of "including" or "including" in various embodiments of the present invention can be used to refer to the presence of a corresponding function, operation or component, etc., which is disclosed, Components and the like. Also, in various embodiments of the invention, the terms "comprise" or "having" are intended to specify the presence of stated features, integers, steps, operations, components, parts or combinations thereof, But do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

The expression " or " or " at least one of A and / or B " in various embodiments of the present invention includes any and all combinations of words listed together. For example, each of " A or B " or " at least one of A and / or B " may comprise A, comprise B, or both A and B.

The expressions " first ", " second ", " first ", or " second ", etc. used in various embodiments of the present invention are capable of modifying various elements of various embodiments, . For example, the representations do not limit the order and / or importance of the components. The representations may be used to distinguish one component from another. For example, both the first user equipment and the second user equipment are user equipment and represent different user equipment. For example, without departing from the scope of the various embodiments of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it is to be understood that the element may be directly connected or connected to the other element, It should be understood that there may be other new components between the different components. On the other hand, when it is mentioned that an element is "directly connected" or "directly connected" to another element, it is understood that there is no other element between the element and the other element It should be possible.

The terminology used in the various embodiments of the present invention is used only to describe a specific embodiment and is not intended to limit the various embodiments of the present invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present invention belong. Terms such as those defined in commonly used dictionaries should be interpreted to have the meanings consistent with the contextual meanings of the related art and, unless expressly defined in the various embodiments of the present invention, It is not interpreted as meaning.

An electronic device according to various embodiments of the present invention may be a device including a communication function. For example, the electronic device can be a smartphone, a tablet personal computer, a mobile phone, a videophone, an e-book reader, a desktop personal computer, a laptop Such as a laptop personal computer (PC), a netbook computer, a personal digital assistant (PDA), a portable multimedia player (PMP), an MP3 player, a mobile medical device, a camera, or a wearable device Such as a head-mounted device (HMD) such as electronic glasses, an electronic garment, an electronic bracelet, an electronic necklace, an electronic app apparel, an electronic tattoo, or a smart watch.

According to some embodiments, the electronic device may be a smart home appliance with communication capabilities. [0003] Smart household appliances, such as electronic devices, are widely used in the fields of television, digital video disk (DVD) player, audio, refrigerator, air conditioner, vacuum cleaner, oven, microwave oven, washing machine, air cleaner, set- And may include at least one of a box (e.g., Samsung HomeSync ™, Apple TV ™, or Google TV ™), game consoles, an electronic dictionary, an electronic key, a camcorder,

According to some embodiments, an electronic device may include a variety of medical devices (e.g., magnetic resonance angiography (MRA), magnetic resonance imaging (MRI), computed tomography (CT), a camera, an ultrasonic device, Devices such as a global positioning system receiver, an event data recorder (EDR), a flight data recorder (FDR), an automotive infotainment device, a marine electronic device such as a marine navigation device and a gyro compass, an automotive head unit, an industrial or household robot, an ATM (automatic teller's machine) of a financial institution, or a point of sale (POS) of a store.

According to some embodiments, the electronic device may be a piece of furniture or a structure / structure including a communication function, an electronic board, an electronic signature receiving device, a projector, (E.g., water, electricity, gas, or radio wave measuring instruments, etc.). An electronic device according to various embodiments of the present invention may be one or more of the various devices described above. Further, the electronic device according to various embodiments of the present invention may be a flexible device. It should also be apparent to those skilled in the art that the electronic device according to various embodiments of the present invention is not limited to the above-described devices.

Hereinafter, an electronic device according to various embodiments will be described with reference to the accompanying drawings. The term user as used in various embodiments may refer to a person using an electronic device or a device using an electronic device (e.g., an artificial intelligence electronic device).

DETAILED DESCRIPTION Various embodiments of the present invention will now be described with reference to the accompanying drawings, in which: FIG.

Hereinafter, various embodiments of the present invention may assume that the VoLTE (Voice of LTE) service over the LTE network is not supported, or that the electronic device does not support the VoLTE service. For example, if the electronic device supports a VoLTE service but does not support a VoLTE service over an LTE network, the electronic device may provide LTE services according to an embodiment of the present invention. In another example, if the electronic device does not support the VoLTE service and does not support the VoLTE service over the LTE network, the electronic device may provide LTE service according to an embodiment of the present invention. As another example, if the VoLTE service is supported by the LTE network but the electronic device does not support the VoLTE service, the electronic device can provide the LTE service according to the embodiment of the present invention.

1 illustrates a configuration of a wireless communication system according to an embodiment of the present invention.

1, an LTE region 100 supporting a CSFB (hereinafter referred to as a CSFB region) may be included in an LTE region 110 (hereinafter, referred to as a 'non-CSFB region') that does not support CSFB have. Although not shown, the service areas of the 2G communication system and the 3G communication system may include the CSFB area 100 and the non-CSFB area 110. [ Herein, the 2G communication system includes at least one of a Global System for Mobile Communication (GSM) network and a Code Division Multiple Access (CDMA) network. The 3G communication system includes a Wideband-CDMA (W- Time Division Synchronous CDMA) network or EV-DO (Evolution-Data Optimized) network.

When the electronic device 120 supporting the CSFB 100 is located in an area where the CSFB area 100 and the non-CSFB area 110 are overlapped 131, the electronic device 120 transmits the CSFB area 100, And can access the LTE network through the first base station 102 to provide data and voice services.

According to one embodiment, when the electronic device 120 enters the non-CSFB area 110 (133), the electronic device 120 can not perform voice service while connected to the LTE network, Deactivate, or operate in a dual stack fashion. For example, when entering the non-CSFB region 110 (133), the electronic device 120 may receive a combined attachment or combined TAU (Combined Tracking) via the base station 2 112 of the non- CSFB region 110, Area Update). Base station 2 112 may transmit to electronic device 120 that the corresponding network is a network that does not support CSFB in response to the combined access or composite TAU of electronic device 120. Accordingly, the electronic device 120 can identify the non-CSFB area 110 according to the network information provided from the second base station 112. Here, the dual stack scheme indicates a communication scheme capable of providing an LTE service by activating a data communication module and a voice communication module sharing a wireless transmission / reception module in a non-CSFB area. At this time, the data communication module may include a radio access technology capable of providing a data service according to a packet switching (PS) scheme. The voice communication module may include a radio access technology capable of providing voice service according to a CS (Circuit Switching) method.

According to one embodiment, when the electronic device 120 enters the non-CSFB area 110 and deactivates the LTE communication module, the electronic device 120 uses the control information received via the legacy network CSFB < / RTI > In other words, when the LTE communication module is deactivated, the electronic device 120 can not recognize the entry into the CSFB area 100 using the LTE communication module. Accordingly, the electronic device 120 can confirm the entry into the CSFB area 100 using the control information received through the legacy network from the point of time when the LTE communication module is inactivated. For example, the electronic device 120 can verify entry into the CSFB area 100 using system information provided from a 2G network or a 3G network. In another example, the electronic device 120 can verify the entry into the CSFB area 100 using the identifier of the network in which the electronic device 120 is located. For example, the electronic device 120 can confirm entry into the CSFB area 100 according to whether the CSFB area identification information is received from the network in which the electronic device 120 is located. For example, the electronic device 120 may check the entry of the CSFB area 100 by comparing the network information where the electronic device 120 is located with the preset CSFB area setting information.

According to one embodiment, when the electronic device 120 deactivates the LTE communication module, the electronic device 120 connects to a legacy network (e.g., WCDMA or GSM or TD-SCDMA or GSM) Service or data service). For example, if the electronic device 120 deactivates the LTE communication module, the electronic device 120 may connect to the legacy network to provide voice services and provide communication services. For example, when a plurality of legacy networks coexist, the electronic device 120 may connect to a legacy network (e.g., a 3G network) that provides voice and data services at the same time to provide communication services. For example, a first legacy network (e.g., 3G network, TD-SCDMA, WCDMA) capable of simultaneously providing voice and data services and a second legacy network (e.g., a 2G network, GSM) coexist, the electronic device 120 may connect to the first registrar network to provide communication services.

According to one embodiment, when the electronic device 120 recognizes the entry into the CSFB area 100 (131), the electronic device 120 activates the LTE communication module and activates the LTE communication module to activate the CSFB area 100 And can access the LTE network through the first base station 102 to provide data and voice services.

According to one embodiment, when the electronic device 120 is operating in a dual stack mode (e.g., a heterogeneous network), the electronic device 120 may recognize an entry into the CSFB area 100 via an LTE network , And can recognize the entry into the CSFB area 100 using control information received via a legacy network. For example, if the electronic device 120 is operating in a dual stack fashion, the electronic device 120 may perform a combined access or complex TAU. The electronic device 120 can confirm whether or not it enters the CSFB area 100 based on the response of the complex access or composite TAU. At this time, the electronic device 120 performs a combined access or complex TAU when the service area (or cell) is changed (e.g., periodically or non-periodically), or when the service area Can be selectively performed. Here, the electronic device 120 may selectively perform a combined access or complex TAU based on at least one of the number of service area (or cell) changes, the complex access, or the complex TAU execution time. If the composite access or composite TAU is not used, the electronic device 120 may perform attach or TAU. Here, the service area may include a tracking area (TA). For example, the electronic device 120 may periodically check whether or not the CSFB area 100 is entered using the control information received through the legacy network. For example, when the cell reselection is performed, the electronic device 120 can check whether the CSFB area 100 is entered using the control information received through the legacy network. For example, when performing the handover, the electronic device 120 can confirm whether or not the CSFB area 100 is entered using the control information received through the legacy network. At this time, the electronic device 120 transmits the CSFB area (or the CSFB area) based on at least one of the system information provided from the legacy network, the identifier of the network where the electronic device 120 is located, the reception of the CSFB area identification information, 100) can be confirmed.

According to one embodiment, when the electronic device 120 operates in a dual stack fashion, the electronic device 120 connects to an LTE network and a legacy network to provide communication services (e.g., voice or data services) . For example, when multiple legacy networks coexist, the electronic device 120 may connect to an LTE network and a legacy network (e.g., a 3G network) to provide communication services.

According to one embodiment, the electronic device 120 may monitor the paging signal of the 3G network while providing data services over the LTE network based on the dual stack approach. The electronic device 120 may provide voice and data services over a 3G network when providing voice services over a 3G network. For example, the electronic device 120 can receive data services continuously provided through the LTE network through the 3G network.

According to one embodiment, when the electronic device 120 recognizes the entry into the CSFB area 100, the electronic device 120 switches the communication mode to the CSFB mode, To the LTE network through the first base station 102 of the base station 102 to provide data and voice services.

According to one embodiment, when the electronic device 120 recognizes the entry into the CSFB area 100 (131), the electronic device 120 may operate in a dual stack manner. For example, in the CSFB area 100, a first legacy network (e.g., a 3G network capable of simultaneously providing voice and data services) and a second legacy network (e.g., a 2G network ) Coexist and the LTE network does not provide CSFB functionality over the first legacy network, the electronic device 120 may connect to the LTE network and the first legacy network in a dual stack manner to provide communication services.

2 illustrates a configuration of a wireless communication system according to an embodiment of the present invention.

2, the CSFB region 200 and the non-CSFB region 220 may be included in a service area 210 (hereinafter, referred to as '2G / 3G region') of the 2G communication system / 3G communication system.

The electronic device 230 is connected to the LTE network through the first base station 202 of the CSFB area 200 according to the CSFB scheme when the electronic device 230 supporting the CSFB 200 is located in the CSFB area 200 Thereby providing data and voice services.

According to one embodiment, if the electronic device 230 leaves the CSFB area 200 and enters the 2G / 3G area 210 (243), then the electronic device 230 can access the 2G network It is possible to connect to the 3G network to provide a communication service. For example, the electronic device 230 may be a network capable of simultaneously providing voice and data services, such as 2G network or 3G network, through procedures such as cell reselection or handover (e.g., 3G Network) to provide a communication service. At this time, the electronic device 230 can periodically check the LTE network, or enter the LTE area 200 or 220 through cell reselection or handover. If the entry into the LTE region 200 or 220 is confirmed, the electronic device 230 may perform a combined access or complex TAU. The electronic device 230 can confirm whether or not it enters the CSFB area 200 based on the response of the hybrid access or composite TAU.

According to one embodiment, when the electronic device 230 enters the non-CSFB area 220 (245), the electronic device 230 can not connect to the LTE network and perform voice services, thus disabling the LTE communication module It can operate in a dual stack mode. For example, if the electronic device 230 enters a non-CSFB area 220 (245), the electronic device 230 receives the combined access or composite TAU via the base station 3 222 of the non-CSFB area 220 Can be performed. Base station 3 222 may transmit to electronic device 230 that the corresponding network is a network that does not support CSFB in response to the combined access or composite TAU of electronic device 230. Accordingly, the electronic device 230 can confirm the non-CSFB area 220 according to the network information provided from the base station 3 222. [

According to one embodiment, when the electronic device 230 deactivates the LTE communication module (e.g., when it is connected to a legacy network and receives a communication service), the electronic device 230 uses the control information received via the legacy network It is possible to confirm whether or not it enters the CSFB area 200. In other words, when the LTE communication module is deactivated, the electronic device 230 can not recognize the entry into the CSFB area 200 using the LTE communication module. Accordingly, the electronic device 230 can confirm entry into the CSFB area 200 using the control information received through the legacy network from the time when the LTE communication module is inactivated. For example, the electronic device 230 can confirm the entry into the CSFB area 200 using system information provided from the 2G network or the 3G network. In another example, the electronic device 230 can verify the entry into the CSFB area 200 using the identifier of the network in which the electronic device 230 is located. In another example, the electronic device 230 can confirm entry into the CSFB area 200 according to whether the CSFB area identification information is received from the network in which the electronic device 230 is located. For example, the electronic device 230 can check the entry of the CSFB area 200 by comparing the network information where the electronic device 230 is located with the preset CSFB area setting information.

According to one embodiment, when the electronic device 230 deactivates the LTE communication module, the electronic device 230 may connect to a legacy network to provide communication services (e.g., voice service or data service) have. For example, when a plurality of legacy networks coexist, the electronic device 230 may connect to a legacy network (e.g., a 3G network) that simultaneously provides voice and data services to provide communication services. For example, when a 2G network that can not simultaneously provide voice and data services and a 3G network that can simultaneously provide voice and data services coexist, the electronic device 230 may preferentially access the 3G network to provide communication services can do.

According to one embodiment, when the electronic device 230 recognizes 241 entry into the CSFB area 200 in the 2G / 3G area 210, the electronic device 230 activates the LTE communication module to activate the CSFB Or in a dual stack approach to provide data and voice services by accessing the LTE network through base station 1 202 of the CSFB area 200. [

According to one embodiment, when the 2G network and the 3G network coexist in the CSFB area 200 and the LTE network supports only the CSFB to the 2G network, the electronic device 230 preferentially accesses the 3G network in a dual stack manner Communication service can be provided.

According to one embodiment, when the electronic device 230 enters the non-CSFB region 220 and operates in a dual stack manner, the electronic device 230 may recognize an entry into the CSFB region 200 via the LTE network , It is possible to recognize the entry into the CSFB area 200 using the control information received via the legacy network. For example, when operating in a dual stack fashion, the electronic device 230 may perform a combined access or complex TAU to an LTE network. The electronic device 230 can confirm whether or not it enters the CSFB area 200 based on the response of the hybrid access or composite TAU. At this time, the electronic device 230 may perform a combined access or a combined TAU every time a service area (or cell) is changed, or selectively perform a combined access or a combined TAU when a service area (or cell) is changed.

According to one embodiment, when the electronic device 230 operates in a dual stack fashion, the electronic device 230 connects to an LTE network and a legacy network to provide communication services (e.g., voice service or data service) . For example, when multiple legacy networks coexist, the electronic device 230 may connect to a legacy network (e.g., a 3G network) that simultaneously provides LTE networks and voice and data services to provide communication services. For example, when the 2G network and the 3G network coexist, the electronic device 230 can provide a communication service by connecting to the LTE network and the 3G network in a dual stack manner.

The following description explains a technique for providing an LTE service using an electronic device of the CSFB scheme. According to one embodiment, an electronic device of the CSFB scheme may deactivate the LTE communication module or operate in a dual stack manner when entering the non-CSFB area.

3 shows a block configuration of an electronic device according to an embodiment of the present invention.

3, the electronic device 300 may include a processor 310, a memory 320, an input unit 330, a display unit 340, and a communication unit 350. For example, there may be a plurality of one or more of the processor 310 or the memory 320.

The processor 310 may control the electronic device 300 to provide various services. If the electronic device 300 supports the CSFB scheme, the processor 310 may control to provide data and voice services in accordance with the CSFB scheme. For example, when the electronic device 300 is located in the CSFB area, the processor 310 may control to provide data and voice services using the LTE communication module 356 of the communication unit 350 according to the CSFB scheme have. In another example, if the electronic device 300 is located in a non-CSFB area, the processor 310 controls the LTE communication module 356 to be deactivated, or controls the electronic device 300 to operate in a dual stack manner . At this time, the processor 310 can confirm the non-CSFB region through the response signal of the combined access or the combined TAU provided from the base station of the non-CSFB region through the LTE communication module 356. [ In another example, if the electronic device 300 is located in a legacy service area, the processor 310 may control access to a 2G network or 3G network to provide communication services. At this time, the processor 310 operates in a dual stack mode or a CSFB mode and can provide a communication service by accessing a 2G network or a 3G network. In this case, the processor 310 can periodically check the LTE network, or confirm that it enters the LTE area through cell reselection or handover. If the entry to the LTE area is confirmed, the processor 310 controls the complex access or complex TAU to be performed, and may determine whether to enter the CSFB area based on the response of the complex access or complex TAU.

According to one embodiment, when the LTE communication module 356 is deactivated, the processor 310 may control the control received via one or more of the 2G communication module 352 or the 3G communication module 354 of the communication unit 350 Information can be used to determine whether or not to enter the CSFB area. For example, the processor 310 may determine whether to enter the CSFB area according to the existence of the LTE network information included in the system information of the 2G network. Specifically, when an LTE network supports the CSFB scheme, an LTE network and a legacy network (e.g., a 2G network, a 3G network) can support interworking. To this end, the base station of the 2G network may transmit neighboring 3G network information and LTE network information to one or more electronic devices located in the service area. Meanwhile, when the LTE network does not support the CSFB scheme, the LTE network and the legacy network (e.g., 2G network) for voice service operate independently. Therefore, the base station of the 2G network transmits the neighboring 3G network information and the LTE network information to the 2G network It is not transmitted through the system information of the system. Accordingly, the processor 310 can determine whether to enter the CSFB area according to the existence of the LTE network information included in the system information of the 2G network. Here, the base station of the 2G network can transmit neighboring 3G network information and LTE network information using one or more of the SI2quater message or the SI type 23 message among the system information of the 2G network.

For example, the processor 310 may determine whether to enter the CSFB area using the identifier of the network in which the electronic device 300 is located. Specifically, when a service provider allocates a network identifier such that the CSFB area and the non-CSFB area are distinguished, the processor 310 may determine whether to enter the CSFB area using the identifier of the network in which the electronic device 300 is located have. Here, the identifier of the network may include at least one of a Public Land Mobile Network (PLMN) identifier, a Routing Area Identity (RAI), a cell identifier, or a Location Area Identity (LAI). In addition, the identifier of the network according to the embodiment of the present invention is not limited to the above-described identification information, but may include other identification information unique to the network.

In another example, the processor 310 may determine whether to enter the CSFB area using the LTE network identification information included in the system information of the 2G network or the 3G network. Specifically, the legacy network may transmit LTE network identification information, which can identify the CSFB region and the non-CSFB region, in the system information. Accordingly, the processor 310 can determine whether to enter the CSFB area using the LTE network identification information included in the system information of the legacy network received through the communication unit 350. [ At this time, the legacy network may add the LTE network identification information field to the system information, or may include the LTE network identification information using information not used in the network.

For example, the processor 310 may determine whether to enter the CSFB area according to whether the CSFB area identification information is received from the network in which the electronic device 300 is located. Specifically, the legacy network or the LTE network may transmit a control message including identification information of the CSFB region and the non-CSFB region. Accordingly, the processor 310 can determine whether to enter the CSFB area through the control message received through the communication unit 350. [ In addition, the legacy network may transmit a control message including the CSFB identification information only in the CSFB area. In this case, the processor 310 can determine whether to enter the CSFB area according to whether the control message including the CSFB identification information is received through the communication unit 350. [

For example, the processor 310 can compare the CSFB area setting information stored in the memory 320 with the CSFB area setting information, and determine whether the CSFB area has entered the CSFB area. Specifically, the processor 310 may determine whether to enter the CSFB area according to whether the network where the electronic device 300 is located is included in the CSFB area setting information stored in the memory 320. [

According to one embodiment, when the LTE communication module 356 is deactivated (or not connected to an LTE network), the processor 310 may communicate with the 2G communication module 352 or 3G communication module 354 of the communication unit 350 To provide a communication service by connecting to the legacy network through one or more of the communication modules. For example, if a voice service and a data service can not be simultaneously provided over a 2G network and voice service and data service can be simultaneously provided over a 3G network, the processor 310 transmits a 3G It is possible to control such that the communication service can be provided by preferentially accessing the network.

According to one embodiment, when the electronic device 300 determines entry into the CSFB area, the processor 310 may activate the LTE communication module 356 to control to provide data and voice services in accordance with the CSFB scheme .

The processor 310 may use at least one program stored in the memory 320 to control the electronic device 300 to provide various multimedia services.

The memory 320 may include a data storage unit for storing data generated by driving the electronic device 300 and a program storage unit for storing one or more programs for controlling the operation of the electronic device 300. [ For example, the data storage unit of the memory 320 may store network information of the CSFB area. Here, the network information of the CSFB area may include a network identifier that can be assigned to the CSFB area or identification information of a network that supports the CSFB area.

The input unit 330 may provide the input data generated by the user's selection to the processor 310. For example, the input unit 330 may include at least one of a keypad including at least one hardware button or a touch pad for sensing touch information.

The display unit 340 may display status information of the electronic device 300, a character input by the user, a moving picture and / or a still picture. For example, the display unit 340 may display application program information driven by the processor 310.

The communication unit 350 may connect communication between the electronic device 300 and one or more other electronic devices or one or more base stations. For example, the communication unit 350 may include a 2G communication module 352 for providing a communication service through a 2G communication system, a 3G communication module 354 for providing a communication service through a 3G communication system, and an LTE communication system And an LTE communication module 356 for providing communication services.

In the above-described embodiment, when the electronic device 300 is located in the CSFB area, the processor 310 controls the LTE communication module 356 of the communication unit 350 to provide data and voice service according to the CSFB scheme .

In another embodiment, the processor 310 is connected to a legacy network (e.g., a 3G network) capable of simultaneously providing an LTE network and voice and data services based on the dual stack approach when located in the CSFB area, Or to provide a service.

In the above-described embodiment, the processor 310 determines whether a CSFB area exists in one module, and controls the LTE communication module 356 to be inactivated or activated according to the CSFB area information.

In another embodiment, the processor 310 determines the presence or absence of the CSFB area as shown in FIG. 4 below and controls the components for controlling the LTE communication module 356 to be inactivated or activated according to the CSFB area information, As shown in FIG.

4 shows a detailed block configuration of a processor according to an embodiment of the present invention.

Referring to FIG. 4, the processor 310 may include a CSFB region detection unit 400 and an LTE service control unit 410.

The CSFB region detection unit 400 can determine whether the electronic device 300 is located in the CSFB region. Specifically, when the LTE communication module 356 is inactivated, the CSFB region detection unit 400 can determine whether to enter the CSFB region using the control information received through the legacy network. For example, the CSFB region detection unit 400 can determine whether to enter the CSFB region according to the existence of LTE network information included in the system information of the 2G network. Here, the base station of the 2G network can transmit neighboring 3G network information and LTE network information using one or more of the SI2quater message or the SI type 23 message among the system information of the 2G network.

For example, the CSFB area detector 400 may determine whether to enter the CSFB area using the identifier of the network where the electronic device 300 is located. Specifically, when a service provider allocates a network identifier so that the CSFB area and the non-CSFB area are distinguished, the CSFB area detector 400 determines whether or not the CSFB area enters the CSFB area using the identifier of the network in which the electronic device 300 is located can do. Here, the identifier of the network may include one or more of PLMN identifier, RAI, cell identifier, or LAI. In addition, the identifier of the network according to the embodiment of the present invention is not limited to the above-described identification information, but may include other identification information unique to the network.

For example, the CSFB region detection unit 400 may determine whether to enter the CSFB region using the LTE network identification information included in the system information of the 2G network or the 3G network. Specifically, the legacy network may transmit LTE network identification information, which can identify the CSFB region and the non-CSFB region, in the system information. Accordingly, the CSFB region detection unit 400 can determine whether to enter the CSFB region using the LTE network identification information included in the system information of the legacy network received through the communication unit 350. At this time, the legacy network may add the LTE network identification information field to the system information, or may include the LTE network identification information using information not used in the network.

For example, the CSFB region detection unit 400 may determine whether to enter the CSFB region according to whether the CSFB region identification information is received from the network in which the electronic device 300 is located. Specifically, the legacy network or the LTE network may transmit a control message including identification information of the CSFB region and the non-CSFB region. Accordingly, the CSFB region detection unit 400 can determine whether or not the CSFB region enters the CSFB region through the control message received through the communication unit 350. [ In addition, the legacy network may transmit a control message including the CSFB identification information only in the CSFB area. In this case, the CSFB area detector 400 can determine whether the control message including the CSFB identification information is received through the communication unit 350, or not, into the CSFB area.

For example, the CSFB area detector 400 may compare the CSFB area setting information stored in the memory 320 with the CSFB area setting information and determine whether to enter the CSFB area. Specifically, the CSFB region detection unit 400 can determine whether to enter the CSFB region according to whether the network where the electronic device 300 is located is included in the CSFB region setting information stored in the memory 320. [

According to one embodiment, when the electronic device 300 operates according to the CSFB scheme or the dual stack scheme in the legacy service area, the CSFB region detection unit 400 periodically searches for the LTE network, performs cell reselection or handover It is possible to confirm whether or not the mobile station enters the LTE region. If the access to the LTE area is confirmed, the CSFB area detector 400 controls to perform a combined access to the LTE network or a complex TAU, and determines whether to enter the CSFB area based on the response of the complex access or complex TAU It can be judged.

The LTE service control unit 410 may control to activate or deactivate the LTE communication module 356 depending on whether the electronic device 300 is located in the CSFB area. For example, when the electronic device 300 enters the non-CSFB area, the LTE service control unit 410 may control the LTE communication module 356 to be inactivated. Specifically, the access to the non-CSFB area can be confirmed through the composite access provided by the base station in the non-CSFB area or the response signal of the complex TAU through the LTE communication controller 356 of the LTE service control unit 410. For example, when the LTE communication module 356 is disabled, the LTE service control unit 410 may control the CSFB region detection unit 400 to check whether the LTE communication module 356 enters the CSFB region. If entry into the CSFB area is confirmed through the CSFB area detector 400, the LTE service controller 410 can control the LTE communication module 356 to be activated.

According to various embodiments of the present invention, an electronic device includes an LTE communication module for providing communication services over an LTE network, one or more communication modules for providing communication services over a legacy network, and a circuit switched fallback (CSFB) Determines whether or not the LTE communication network is located in a first LTE region that is an LTE network supporting the LTE network or a second LTE region that is an LTE network that does not support the CSFB, and controls an LTE communication module for supporting the LTE network Wherein the processor activates the LTE communication module when the electronic device is located in the first LTE area and if the electronic device is located in the second LTE area, Can be set to be inactivated.

In an embodiment of the present invention, the processor may be configured to receive information about the LTE network over a legacy network using the one or more communication modules.

In an exemplary embodiment of the present invention, the processor changes from one area of the first LTE area or the second LTE area to another area based on information on the LTE network received through the legacy network If so, it can be set to change the LTE communication module from active to active or from inactive to active.

In an embodiment of the present invention, the processor activates the LTE communication module when the electronic device is located in a legacy network area providing the first LTE area and data service, and activates the LTE communication module, And may be set to connect to the LTE network to provide communication services.

In an embodiment of the present invention, the processor may be configured to provide voice services over the legacy network and provide data services over the LTE network.

In an embodiment of the present invention, the processor may be configured to provide a data service over the legacy network if the electronic device provides voice service over the legacy network.

In an embodiment of the present invention, when the electronic device is located in a legacy network area that does not provide the first LTE area and data service, the processor activates the LTE communication module, connects to the LTE network, Lt; / RTI >

According to various embodiments of the present invention, an electronic device includes an LTE communication module for providing communication service through an LTE network, at least one communication module for providing communication service through a legacy network, and an LTE area for supporting a Circuit Switched FallBack (CSFB) The LTE communication module activates the LTE communication module when receiving the system information including the LTE network information through the legacy network and recognizing entry into the LTE area supporting the CSFB Processor < / RTI >

In the exemplary embodiment of the present invention, the at least one communication module may be a GSM (Global System for Mobile Communication) network, a CDMA (Code Division Multiple Access) network, a W-CDMA (Evolution-Data Optimized) network to provide communication services over one or more legacy networks.

In an embodiment of the present invention, the processor controls the LTE communication module to be inactivated when the electronic device enters a LTE area that does not support CSFB, and the electronic device supports CSFB through the CSFB area validator And when the entry into the LTE area is confirmed, the LTE communication module may be set to be controlled to be activated.

In the embodiment of the present invention, the processor can be configured to check whether an LTE region supporting the CSFB is entered according to whether the SI2quater message or the SI Type 23 message is received or not.

In an embodiment of the present invention, the processor may be configured to periodically monitor system information of the legacy network when the LTE communication module is deactivated and connected to the legacy network via the at least one communication module.

In an embodiment of the present invention, the processor may be configured to receive scheduling information of system information of the legacy network through the one or more communication modules and to recognize entry into the LTE region based on the scheduling information.

In an embodiment of the present invention, the processor may be configured to determine whether the scheduling information includes at least one of an SI2quater message or an SI Type 23 message.

In an embodiment of the present invention, the processor may be configured to receive the system information when performing a cell reselection or a handover when connected to the legacy network.

In an embodiment of the present invention, the processor may be configured to control to maintain the inactive state of the LTE communication module when system information including the LTE network information is not received.

5 illustrates a procedure for identifying a CSFB area using system information in an electronic device (e.g., electronic device 300) in accordance with an embodiment of the present invention.

Referring to FIG. 5, at operation 501, an electronic device (e.g., processor 310) may deactivate an LTE communication module (e.g., LTE communication module 356). For example, if the electronic device supporting the CSFB enters the non-CSFB area, the electronic device may deactivate the LTE communication module. For example, the electronic device can confirm whether to enter the non-CSFB area using the response signal to the complex access or the complex TAU transmitted through the LTE network.

At operation 503, the electronic device can verify system information including LTE network information over the legacy network. For example, the electronic device can verify that information about the LTE network adjacent to the system information received via the 2G network or the 3G network is included. As another example, the electronic device can confirm that the CSFB area information is included in the system information received through the 2G network or the 3G network.

In operation 505, if the electronic device identifies the system information including the LTE network information via the legacy network, it can recognize that the electronic device enters the CSFB area and activate the LTE communication module.

In the above-described embodiment, when the LTE communication module is activated, the electronic device can access the LTE network according to the CSFB scheme and control to provide data and voice service.

6 illustrates a detailed procedure for identifying a CSFB area using system information in an electronic device (e.g., electronic device 300) in accordance with an embodiment of the present invention.

Referring to FIG. 6, at operation 601, an electronic device (e.g., processor 310) may determine whether to deactivate an LTE communication module (e.g., LTE communication module 356). For example, if an electronic device supporting CSFB enters a non-CSFB area, the electronic device may deactivate the LTE communication module. For example, the electronic device can confirm whether to enter the non-CSFB area using the response signal to the complex access or the complex TAU transmitted through the LTE network.

At operation 603, the electronic device can verify that it is reachable to the 3G network if the LTE communication module is deactivated. For example, the electronic device can verify that there is a 3G network accessible via the 3G communication module 354.

At operation 605, if the electronic device is connectable to the 3G network, it may connect to the 3G network to provide communication services.

At operation 607, the electronic device can monitor the system information of the 2G network during connection to the 3G network to verify system information including LTE network information. For example, the electronic device can periodically check whether system information including LTE network information is received. For example, the electronic device may receive the scheduling information of the system information of the 2G network to check whether the system information including the LTE network information exists. Specifically, in the case of the GSM (Global System for Mobile communication) standard, an electronic device can receive a Frequency Correction Burst (FB) and a Synchronization Burst (SB) of a 2G network to perform synchronization. Thereafter, the electronic device receives the scheduling information of the system information of the 2G network, and confirms whether the system information including the LTE network information exists. At this time, when operating in the idle mode, the electronic device can continuously receive FB, SB, and scheduling information of the system information of the 2G network during a sleep interval. On the other hand, when operating in a connection mode, the electronic device monitors the system information of the 2G network and discontinuously receives the FB, SB, and scheduling information of the system information to reduce the time for suspending the 3G service You may. Here, the system information including the LTE network information may include at least one of an SI2quater message or an SI Type 23 message.

If the system information of the 2G network including the LTE network information can not be checked, the electronic device can recognize that it has not entered the CSFB area. Accordingly, the electronic device can periodically monitor the system information of the 2G network during connection to the 3G network to confirm that system information including LTE network information is received.

In operation 609, when the electronic device receives the system information of the 2G network including the LTE network information or confirms the existence of the system information of the 2G network including the LTE network information, the electronic device recognizes that it has entered the CSFB area, Can be activated. For example, the electronic device may control the connection to the LTE network according to the CSFB to provide data and voice services.

At operation 611, if the electronic device can not connect to the 3G network, it can verify that it is reachable to the 2G network. For example, the electronic device can verify that there is a 2G network connectable through the 2G communication module 352. [

If the 2G network is not reachable, the electronic device may display a warning message that the communication service is restricted. For example, if it is not possible to connect to the 2G network, the electronic device can again verify that it is reachable to the 3G network. If the 3G network and the 2G network can not be contacted for a predetermined number of times, the electronic device may display a warning message that the communication service is restricted.

In operation 613, if the electronic device is connectable to the 2G network, it may connect to the 2G network to provide communication services.

At operation 615, the electronic device can verify system information including LTE network information. For example, the electronic device can periodically check whether system information including LTE network information is received. As another example, when the electronic device performs cell reselection, it can confirm that system information including the LTE network information is received. In another example, when performing handover, the electronic device can confirm that system information including LTE network information is received. In another example, when the electronic device performs cell reselection, the presence of system information including the LTE network information can be confirmed through the scheduling information. In another example, when the handover is performed, the electronic device can confirm whether the system information including the LTE network information exists through the scheduling information. Here, in the case of the GSM standard, the system information including the LTE network information may include at least one of an SI2quater message or an SI Type 23 message.

If the system information of the 2G network including the LTE network information can not be checked, the electronic device can recognize that it has not entered the CSFB area. Accordingly, the electronic device can confirm that system information including LTE network information is received.

In operation 609, when the electronic device receives the system information of the 2G network including the LTE network information or confirms the existence of the system information of the 2G network including the LTE network information, the electronic device recognizes that it has entered the CSFB area, Can be activated. At this time, the electronic device can control to provide data and voice service by connecting to the LTE network according to the CSFB.

In the above-described embodiment, the electronic device can confirm the entry into the CSFB area using the system information of the 2G network including the LTE network information.

In another embodiment, the electronic device can verify entry into the CSFB area using LTE network identification information included in system information of the 3G network or the 2G network. For example, the electronic device can confirm the entry into the CSFB area using the LTE network identification information added to the system information of the 3G network or the 2G network to identify the CSFB area and the non-CSFB area. At this time, the electronic device may use LTE network identification information as system information that is not used in the network.

Figure 7 illustrates a procedure for identifying a CSFB region using a network identifier in an electronic device (e.g., electronic device 300) in accordance with an embodiment of the present invention.

Referring to FIG. 7, at operation 701, an electronic device (e.g., processor 310) may determine whether to deactivate an LTE communication module (e.g., LTE communication module 356). For example, if an electronic device supporting CSFB enters a non-CSFB area, the electronic device may deactivate the LTE communication module. For example, the electronic device can confirm whether to enter the non-CSFB area using the response signal to the complex access or the complex TAU transmitted through the LTE network.

In operation 703, the electronic device may connect to the 3G network or the 2G network to provide communication services when the LTE communication module is deactivated. For example, if the LTE communication module is deactivated, the electronic device can verify that there is a 3G network or a 2G network connectable via the 3G communication module 354 and the 2G communication module 352. [ According to one embodiment, when there is a 3G network or 2G network connectable, the electronic device can connect to the 3G network or 2G network to provide communication services. According to one embodiment, if there is no 3G network or 2G network connectable, the electronic device may display a warning message that the communication service is restricted.

In operation 705, when the electronic device is connected to the 3G network or the 2G network to provide communication service, it can confirm that the network identifier of the CSFB area is detected. For example, when a service provider allocates a network identifier such that the CSFB region and the non-CSFB region are distinguished from each other, the electronic device can periodically check whether a network identifier that can be allocated to the CSFB region is detected. Here, the identifier of the network may include one or more of PLMN identifier, RAI, cell identifier, or LAI.

 If the network identifier of the CSFB area is not detected, the electronic device can recognize that it has not entered the CSFB area. Accordingly, the electronic device can access the 3G network or the 2G network to check whether the network identifier of the CSFB area is detected while providing the communication service.

 In operation 707, if the network identifier of the CSFB area is detected, the electronic device can recognize that it has entered the CSFB area and activate the LTE communication module. At this time, the electronic device can control to provide data and voice service by connecting to the LTE network according to the CSFB.

FIG. 8 shows a procedure for identifying a CSBF area using CSFB area indication information in an electronic device (e.g., electronic device 300) according to an embodiment of the present invention.

8, at operation 801, an electronic device (e.g., processor 310) may determine whether to deactivate an LTE communication module (e.g., LTE communication module 356). For example, if an electronic device supporting CSFB enters a non-CSFB area, the electronic device may deactivate the LTE communication module. At this time, the electronic device can confirm whether or not it enters the non-CSFB area by using the response signal to the complex access or complex TAU transmitted to the LTE network.

At operation 803, the electronic device may connect to the 3G network or the 2G network to provide communication services if the LTE communication module is deactivated. For example, if the LTE communication module is deactivated, the electronic device can verify that there is a 3G network or a 2G network connectable via the 3G communication module 354 and the 2G communication module 352. [ If there is a 3G network or 2G network connectable, the electronic device can connect to the 3G network or 2G network to provide communication services. On the other hand, if there is no connectable 3G network or 2G network, the electronic device may display a warning message that the communication service is restricted.

At operation 805, when the electronic device is connected to the 3G network or the 2G network to provide communication service, it can confirm that the CSFB area identification information is received. For example, the base station of the CSFB area may periodically transmit a control message including the CSFB area identification information to the service area. Accordingly, the electronic device can periodically check whether the CSFB area identification information is received.

 If the CSFB area identification information is not received, the electronic device can recognize that it has not entered the CSFB area. Accordingly, the electronic device can access the 3G network or the 2G network to confirm whether the CSFB area identification information is received while providing the communication service.

In operation 807, if the electronic device receives the CSFB area identification information, the electronic device can recognize that it has entered the CSFB area and activate the LTE communication module. At this time, the electronic device can control to provide data and voice service by connecting to the LTE network according to the CSFB.

9 shows a procedure for identifying a CSFB area using CSFB network information in an electronic device (e.g., electronic device 300) according to an embodiment of the present invention.

Referring to FIG. 9, at operation 901, an electronic device (e.g., processor 310) may determine whether to deactivate an LTE communication module (e.g., LTE communication module 356). For example, if an electronic device supporting CSFB enters a non-CSFB area, the electronic device may deactivate the LTE communication module. At this time, the electronic device can confirm whether or not it enters the non-CSFB area by using the response signal to the complex access or complex TAU transmitted to the LTE network.

In operation 903, the electronic device can connect to the 3G network or the 2G network to provide communication services when the LTE communication module is deactivated. For example, if the LTE communication module is deactivated, the electronic device can verify that there is a 3G network or a 2G network connectable via the 3G communication module 354 and the 2G communication module 352. [ If there is a 3G network or 2G network connectable, the electronic device can connect to the 3G network or 2G network to provide communication services. On the other hand, if there is no connectable 3G network or 2G network, the electronic device may display a warning message that the communication service is restricted.

At operation 905, when the electronic device is connected to the 3G network or the 2G network to provide communication services, it can identify unique identification information that may represent the serving network. For example, the electronic device may include one or more of the TAI, RAI, cell identifier, or LAI of the serving network.

In operation 907, when unique identification information of the serving network is confirmed, it can be confirmed whether unique identification information of the serving network is included in the preset CSFB area setting information. Here, the CSFB area setting information may include identification information for one or more communication networks supporting the CSFB.

In operation 905, if the unique identification information of the serving network is not included in the CSFB area setting information, the electronic device recognizes that the electronic device has failed to enter the CSFB area and can identify unique identification information that can indicate the serving network have. For example, the electronic device can verify that the serving network has changed. If the serving network is changed, then the electronic device can identify unique identification information that may represent the serving network in 905 operation. On the other hand, if the serving network is not changed, the electronic device can continuously check whether the serving network is changed.

In operation 909, if the unique identification information of the serving network is included in the CSFB area setting information, the electronic device recognizes that it has entered the CSFB area and can activate the LTE communication module. At this time, the electronic device can control to provide data and voice service by connecting to the LTE network according to the CSFB.

In the above-described embodiment, when the LTE communication module is inactivated, the electronic device can determine whether to enter the CSFB area using the control information received through the legacy network.

In another embodiment, the electronic device may periodically activate the LTE communication module to determine whether to enter the CSFB area. For example, the electronic device may periodically perform a combined access or complex TAU through the LTE communication module to determine whether to enter the CSFB area. In another example, the electronic device may periodically activate the LTE communication module to verify that a control message including CSFB region identification information transmitted over the LTE network is received. Here, the CSFB region identification information may include an identifier of a network such as a TAI (Tracking Area Identity).

According to various embodiments of the present invention, the operation of the electronic device is such that the electronic device is located in a first LTE area that is an LTE network supporting circuit switched fallback (CSFB) or a second LTE area that is an LTE network that does not support the CSFB And controlling the LTE communication module to support the LTE network based on a result of the determination, wherein the controlling operation is performed when the electronic device is located in the first LTE area , Activating the LTE communication module and deactivating the LTE communication module if the electronic device is located in the second LTE area.

In an embodiment of the present invention, the determining operation may include receiving information about the LTE network over a legacy network.

In the embodiment of the present invention, the controlling operation may be performed in any one of the first LTE region and the second LTE region based on information on the LTE network received through the legacy network And changing the activation or deactivation of the LTE communication module from activation to activation if it is determined to be changed.

In an embodiment of the present invention, the controlling operation may include activating the LTE communication module when the electronic device is located in a legacy network area providing the first LTE area and data service, Network and accessing the LTE network to provide communication services.

In an embodiment of the present invention, the act of providing the communication service may include providing voice service over the legacy network and providing data service over the LTE network.

The operation of providing the communication service in an embodiment of the present invention may include providing the data service through the legacy network when the electronic device provides voice service through the legacy network.

In an embodiment of the present invention, the controlling operation may include an operation of activating the LTE communication module and an operation of connecting to the LTE network when the electronic device is located in a legacy network area that does not provide the first LTE area and data service And providing a CSFB-based communication service.

According to various embodiments of the present invention, an operation method of an electronic device includes an operation of deactivating an LTE communication module when entering an LTE area that does not support Circuit Switched FallBack (CSFB), and an operation of including an LTE network information through a legacy network And activating the LTE communication module when receiving the system information and recognizing entry into the LTE area supporting the CSFB.

In an exemplary embodiment of the present invention, the legacy network includes a 2G communication system including at least one of a Global System for Mobile Communications (GSM) network and a Code Division Multiple Access (CDMA) network, a Wideband-CDMA A 3G communication system that includes one or more of: a Time Division-Synchronous CDMA network, an Evolution-Data Optimized (EV-DO) network.

In an embodiment of the present invention, the operation of confirming that the system information is received may include checking whether at least one of SI2quater message or SI Type 23 message is received.

In an exemplary embodiment of the present invention, the step of confirming whether the system information is received may include the steps of connecting to the legacy network and receiving system information including LTE network information through the legacy network when the LTE communication module is inactivated ≪ / RTI >

In the embodiment of the present invention, the step of confirming whether the system information is received may include: receiving scheduling information of the system information of the legacy network, and determining whether the SI2quater message or the SI type 23 message is present in the scheduling information ≪ / RTI >

In an embodiment of the present invention, activating the LTE communication module may include activating the LTE communication module if the system information includes one or more of an SI2quater message or an SI Type 23 message.

In the embodiment of the present invention, the operation of checking whether the system information is received may include checking whether the system information is received when the cell reselection or the handover is performed when the legacy network is connected.

In an embodiment of the present invention, when the system information including the LTE network information is not received, the mobile station may further include an operation of maintaining the inactive state of the LTE communication module.

In a preferred embodiment of the present invention, when system information including the LTE network information is received, an operation of transmitting a combined attach or a combined TAU (combined attaching TAU) receiving the response information for the combined Tracking Area Update, and determining whether to enter the LTE region supporting the CSFB based on the response information.

In the embodiment of the present invention, when the LTE communication module is activated, it may further include an operation of providing an LTE data service and a voice service according to the CSFB scheme.

In the above-described embodiment, the electronic device can deactivate the LTE communication module when entering the non-CSFB area.

In another embodiment, when an electronic device enters a non-CSFB area, it may switch to a dual stack scheme to provide LTE services. For example, the electronic device can be configured as shown in FIG. 10 to provide a dual stack approach.

Fig. 10 shows a block configuration of an electronic device according to an embodiment of the present invention.

10, the electronic device 1000 may include a processor unit 1010, a transmission / reception module 1020, a switch module 1030, an input unit 1040, a display unit 1050, and a memory 1060. For example, the processor unit 1010 may operate in the same manner as the processor 310 of FIG. 3, and the transmission / reception module 1020 and the switch module 1030 may operate logically or physically within the communication unit 350 of FIG. Lt; RTI ID = 0.0 > modules. ≪ / RTI > For example, a plurality of memories 1060 may exist.

The processor unit 1010 may include a plurality of processors 1012 and 1014.

The first processor 1012 may control the operation of the electronic device 1000. The first processor 1012 can determine the LTE communication mode according to the LTE characteristics of the area where the electronic device 1000 is located. For example, when the electronic device 1000 is located in the CSFB area, the first processor 1012 can control to perform communication according to the CSFB scheme. In another example, when the electronic device 1000 is located in the non-CSFB area, the first processor 1012 can control to perform communication according to the double stack method.

According to one embodiment, when the electronic device 1000 leaves the LTE network, the first processor 1012 may control to connect to the 2G network or 3G network to perform communications. For example, the first processor 1012 can control to perform communication by connecting to any one of the 2G network or the 3G network, which can simultaneously provide voice service and data service. For example, when the electronic device 1000 is located in a legacy service area, the first processor 1012 may control to operate in a CSFB scheme or a dual stack scheme. In this case, the first processor 1012 can periodically check the LTE network, or confirm that it enters the LTE area through cell reselection or handover. If the entry into the LTE area is confirmed, the first processor 1012 controls the complex access to the LTE network or the complex TAU to be performed, and whether to enter the CSFB area based on the response of the complex access or complex TAU It can be judged.

According to one embodiment, when the electronic device 1000 operates in a dual stack manner in a non-CSFB region, the first processor 1012 uses the control information received via the LTE network or the legacy network to enter the CSFB region Can be determined. For example, when operating in a dual stack manner in a non-CSFB region, the first processor 1012 may perform a combined access or complex TAU. The first processor 1012 may determine whether the CSFB area has entered the CSFB area based on the response of the hybrid access or composite TAU. At this time, the first processor 1012 may perform a combined access or a combined TAU whenever a service area (or cell) is changed, or selectively perform a combined access or a combined TAU when a service area (or cell) changes . In another example, the first processor 1012 may periodically determine whether to enter the CSFB area using control information received via the legacy network. For example, when performing the cell reselection, the first processor 1012 may determine whether to enter the CSFB area using the control information received through the legacy network. For example, when performing the handover, the first processor 1012 may determine whether to enter the CSFB area using the control information received through the legacy network. At this time, based on at least one of the system information provided from the legacy network, the identifier of the network where the electronic device 1000 is located, the reception of the CSFB area identification information, or the preset CSFB area setting information, It is possible to judge whether or not the vehicle enters the vehicle.

According to one embodiment, when the electronic device 1000 operates in a dual stack manner, the first processor 1012 may be connected to an LTE network and a legacy network to provide communication services (e.g., voice services or data services) Can be provided. For example, when a plurality of legacy networks coexist, the first processor 1012 may connect to a legacy network (e.g., a 3G network) that simultaneously provides an LTE network and voice and data services to provide communication services . For example, when a 2G network that can not simultaneously provide voice and data services and a 3G network that can simultaneously provide voice and data services coexist, the first processor 1012 does not operate in the CSFB scheme, It is possible to provide a communication service by connecting to the 3G network in a dual stack manner.

The first processor 1012 may control to provide multimedia services using at least one program stored in the memory 1060.

The second processor 1014 can control to provide the communication service of the electronic device 1000 using the first communication module 1016 and the second communication module 1018 that are logically or physically distinguished. The second processor 1014 may control to provide the communication service according to the communication method determined by the first processor 1012. [ If the first processor 1012 determines that the communication method is the CSFB method, the second processor 1014 may determine whether the first communication module 1016 or the second communication module 1018 is a communication module So as to provide a communication service. Meanwhile, when the first processor 1012 determines the communication scheme to be a dual stack scheme, the second processor 1014 performs communication using the first communication module 1016 and the second communication module 1018 according to the dual stack scheme Service can be provided. For example, when operating in a dual stack fashion, the second processor 1014 may provide data services using a first communication module 1016 that provides data services such as LTE services. At this time, the second processor 1014 may receive the control signal from the 2G network or the 3G network using the second communication module 1018 which provides the voice service. Here, the control signal may include at least one of a paging signal indicating whether a voice signal is present or a control signal for identifying a CSFB region. In another example, when operating in a dual stack manner, the second processor 1014 may utilize the second communication module 1018 to provide voice services over a 2G network or 3G network. In another example, when operating in a dual stack fashion, the second processor 1014 receives control signals from the LTE network using the first communication module 1016 and uses the second communication module 1018 2G network or a 3G network.

The second processor 1014 selects a communication module to use the transmission / reception module 1020 for operation such as channel status check and cell reselection, or controls the transmission / reception path from the transmission / can do.

The transmission / reception module 1020 can transmit and receive signals of a plurality of communication networks. For example, the transmission / reception module 1020 can process signals transmitted and received through a circuit switching network and a packet switching network (PS network). For example, the transmission / reception module 1020 can process a signal transmitted / received through the CS network and the PS network using one or more transmission / reception sub-modules logically or physically separated.

The switch module 1030 includes one or more switches and communicates with the communication modules 1016 and 1018 included in the transmission / reception module 1020 and the second processor 1014 according to the communication method determined by the first processor 1012 You can connect. For example, when operating in the CSFB mode, the switch module 1030 transmits the transmission path and the reception path of the transmission / reception module 1020 to the first communication module 1016 and the second communication module 1016 according to the service type (e.g., data service, voice service) The second communication module 1018 can be connected to any one of the communication modules. In another example, when operating in a dual stack manner, the switch module 1030 may couple the receive paths of the transmit / receive module 1020 to the first communications module 1016. If it is time to receive a control signal from the 2G network or the 3G network, the switch module 1030 may connect one or more of the receive paths of the transmit / receive module 1020 to the second communications module 1018 have. In another example, when operating in a dual stack mode, the switch module 1030 connects one of the receive paths of the transmit / receive module 1020 to the first communications module 1016, Module 1018 as shown in FIG.

The input unit 1040 may provide the input data generated by the user's selection to the processor unit 1010. [ For example, the input unit 1040 may include at least one of a keypad including at least one hardware button, or a touch pad for sensing touch information.

The display unit 1050 may display status information of the electronic device 1000, characters entered by the user, moving pictures and / or still pictures, and the like. For example, the display unit 1050 can display application program information driven by the processor unit 1010. [

The memory 1060 may include a data storage unit for storing data generated by driving the electronic device 1000 and a program storage unit for storing one or more programs for controlling the operation of the electronic device 1000. [ For example, the data store of memory 1060 may store network information in the CSFB area. Here, the network information of the CSFB area may include a network identifier that can be assigned to the CSFB area or identification information of a network that supports the CSFB area.

In the above-described embodiment, the first communication module 1016 of the second processor 1014 supports data services, and the second communication module 1018 can support voice services.

In another embodiment, the first communication module 1016 of the second processor 1014 may support both data services and voice services over the CSFB scheme, and the second communication module 1018 may support voice services. According to one embodiment, when the electronic device 1000 operates in a CSFB manner, the second processor 1014 may provide a data service and a voice service in accordance with the CSFB scheme using the first communication module 1016 . According to one embodiment, when the electronic device 1000 operates in a dual stack manner, the second processor 1014 provides data services using the first communication module 1016 and the second communication module 1018, To provide voice service.

In the above-described embodiment, the electronic device 1000 includes a first processor 1012 for determining a communication mode and a second processor 1012 for controlling a communication module used for transmitting and receiving signals according to a communication mode determined by the first processor 1012. [ Processor 1014. < / RTI >

In another embodiment, the electronic device 1000 can determine a communication mode using one processor and control a communication module used to transmit and receive signals according to the determined communication mode.

According to various embodiments of the present invention, when an electronic device enters an LTE area that does not support a data communication module for data service, a voice communication module for voice service, and a Circuit Switched FallBack (CSFB) Activating the voice communication module to provide an LTE data service and a voice service according to a dual stack scheme, receiving system information including LTE network information through the legacy network, and transmitting the LTE data service and voice service to an LTE area supporting CSFB And a processor for controlling to provide the LTE data service and the voice service according to the CSFB scheme by using the data communication module and the voice communication module when recognizing the entry.

In an embodiment of the present invention, the data communication module is connected to a first network for data service to monitor a control signal from the first network, and the voice communication module connects to a second network for voice service Wherein the data communication module and the voice communication module are connected to the first network and the second network at the same time to control the first network and the second network when the dual- May be set to monitor the signal.

In an embodiment of the present invention, the legacy network may be a Global System for Mobile Communications (GSM) network, a Code Division Multiple Access (CDMA) network, a Wideband-CDMA (W-CDMA) network, a Time Division-Synchronous CDMA (TD- Network, or an Evolution-Data Optimized (EV-DO) network.

In the embodiment of the present invention, the processor may be configured to check whether an LTE region supporting the CSFB is entered according to whether or not system information including at least one of an SI2quater message and an SI Type 23 message is received.

According to various embodiments of the present invention, when there is a data communication module for data service, a voice communication module for voice service, and a legacy network capable of simultaneously providing data service and voice service in the LTE network area, And a processor for providing at least one of a data service or a voice service according to the dual stack scheme based on the LTE network and the legacy network.

In an embodiment of the present invention, the processor is further configured to: determine whether the legacy network supports CSFB in the LTE network and support the CSFB in the LTE network; if the legacy network supports CSFB in the LTE network, And may be configured to provide at least one of the data service or the voice service according to the CSFB scheme.

In an embodiment of the present invention, the processor may be configured to provide at least one of a data service or a voice service according to a dual stack scheme when the CSFB is not supported in the LTE network to the legacy network .

In an embodiment of the invention, the legacy network may include one or more of a Wideband-CDMA (W-CDMA) network, a TD-SCDMA (Time Division-Synchronous CDMA) network or an Evolution-Data Optimized have.

In an embodiment of the present invention, the processor may be configured to determine whether the legacy network exists by using system information provided from the LTE network.

In an embodiment of the present invention, the processor is connected to the LTE network for data service through the data communication module, connects to the legacy network for voice service via the voice communication module, Monitor the control signal from the LTE network, and monitor the control signal from the legacy network via the voice communication module.

In an embodiment of the present invention, the processor is further configured to: if the connection with the legacy network is to be deactivated, determine if there is another legacy network to which it is accessible; if the other legacy network is present, , And if the LTE network supports the CSFB in the legacy network, it may be configured to perform a combined TAU (combined tracking area update) to switch to the CSFB scheme.

In an embodiment of the present invention, the other legacy network may include one or more of a Global System for Mobile Communication (GSM) network or a Code Division Multiple Access (CDMA) network.

In an embodiment of the present invention, the processor is configured to provide at least one of a data service or a voice service in accordance with the CSFB scheme when the legacy network does not exist and another legacy network supporting the CSFB of the LTE network exists .

In the embodiment of the present invention, the processor checks whether there is the legacy network connectable during service provision according to the CSFB scheme, performs location registration with the legacy network when the legacy network exists, And may be configured to provide at least one of a data service or a voice service according to a network and a dual stack scheme based on the legacy network.

In an embodiment of the present invention, the processor may be configured to provide data services over the legacy network of voice services over the legacy network.

11 shows a procedure for providing LTE services in a non-CSFB area in an electronic device (e.g., electronic device 300 or 1000) according to an embodiment of the present invention.

11, at operation 1101, an electronic device (e.g., processor 310 or 1010) enters a non-CSFB area. For example, the electronic device may transmit a response to a complex access or complex TAU It is possible to confirm whether or not the signal enters the non-CSFB area.

In operation 1103, the electronic device provides data services over the LTE network and voice services over the 2G network or 3G network according to the dual stack approach of a single wireless environment when entering the non-CSFB area. For example, referring to FIG. 10, an electronic device 1000 may include a second communication module (not shown) that provides voice services of LTE data services through a first communication module 1016 that provides communication services via an LTE communication system 1018 to receive control signals from the 2G network or the 3G network. 10, electronic device 1000 may receive a control signal from an LTE network using a first communication module 1016 and may communicate with a second network module 1018 using a second communication module 1018, And may receive control signals from the 3G network.

At operation 1105, the electronic device verifies that it is entering the CSFB area. At this time, the electronic device can determine whether to enter the CSFB area using the control information received through the LTE network or the legacy network. For example, the electronic device can determine whether to enter the CSFB area based on the response of the complex access or complex TAU. For example, when determining whether to enter the CSFB area using the control information received through the legacy network, the electronic device periodically determines whether to enter the CSFB area using the control information received through the legacy network It can be judged. For example, when determining whether to enter the CSFB area using the control information received through the legacy network, the electronic device selects the CSFB area using the control information received through the legacy network Can be determined. For example, when determining whether to enter the CSFB area using the control information received through the legacy network, the electronic device determines whether to enter the CSFB area using the control information received through the legacy network at the time of performing the handover. It can judge whether or not to enter. At this time, the electronic device determines whether to enter the CSFB area based on at least one of the system information provided from the legacy network, the identifier of the network in which the electronic device is located, whether the CSFB area identification information is received, or the preset CSFB area setting information .

In operation 1107, if the electronic device enters the CSFB area, it provides the LTE service according to the CSFB scheme.

12 illustrates a procedure for providing LTE services in a non-CSFB area in an electronic device (e.g., electronic device 300 or 1000) according to an embodiment of the present invention.

12, at operation 1201, an electronic device (e.g., processor 310 or 1010) may verify that it is entering a non-CSFB area. For example, the electronic device can confirm whether or not it enters the non-CSFB area by using the response signal to the complex access or complex TAU transmitted to the LTE network.

At operation 1203, the electronic device provides LTE data services and voice services over a 2G network or 3G network according to a dual stack approach in a single wireless environment, when entering the non-CSFB area. For example, if it is assumed in FIG. 10 that the first communication module 1016 provides the data service using the LTE communication system and the second communication module 1018 provides the voice service using the GSM communication system, The apparatus 1000 can simultaneously receive the control signals from the two networks by connecting to the LTE network and the GSM network through the first communication module 1016 and the second communication module 1018. [ The electronic device 1000 may also receive control signals from the GSM network via the second of the LTE data services 1018 via the first communication module 1016. [ Here, the control signal may include at least one of a paging signal or a control signal for identifying a CSFB area.

At operation 1205, if the electronic device has not entered the non-CSFB area, it verifies that it enters the CSFB area. At this time, the electronic device can determine whether to enter the CSFB area using the control information received through the LTE network or the legacy network. Here, the control information received through the LTE network may include response information that the electronic device provides to the base station by performing a combined access or a complex TAU.

In operation 1207, when the electronic device enters the CSFB area, it provides the LTE service according to the CSFB scheme.

In operation 1209, if the electronic device does not enter the CSFB area, it can recognize that it has entered the 2G network or the 3G network and connect to the 2G network or 3G network to provide communication service.

13 shows a procedure for identifying a CSFB area in an electronic device (e.g., electronic device 300 or 1000) located in a non-CSFB area according to an embodiment of the present invention.

Referring to FIG. 13, at operation 1301, an electronic device (e.g., processor 310 or 1010) confirms entry into a non-CSFB area. For example, the electronic device can confirm whether or not it enters the non-CSFB area by using the response signal to the complex access or complex TAU transmitted to the LTE network.

In operation 1303, when the electronic device enters the non-CSFB area, it can provide data service over the LTE network and voice service over the 2G network or the 3G network according to the dual stack scheme of a single radio environment.

At operation 1305, the electronic device can confirm that the service area is changed. For example, the electronic device can verify that the service area (or cell) is changed through handover or cell reselection.

In operation 1303, the electronic device may provide data services over the LTE network and voice services over the 2G network or 3G network according to the dual stack approach, if the service area (or cell) is unaltered.

At operation 1307, the electronic device may perform a combined access or complex TAU if the service area (or cell) is changed.

At operation 1309, the electronic device can verify that it is entering the CSFB area using the response signal of the complex access or composite TAU. For example, if the electronic device performs a combined access or complex TAU, the base station sends information to the electronic device about whether or not it supports CS (circuit switching) network access for the CSFB in response to a hybrid access or composite TAU . Accordingly, the electronic device can confirm whether or not it enters the CSFB area using the response signal of the hybrid access or composite TAU.

In operation 1303, if the electronic device does not enter the CSFB area, it can provide data services over the LTE network and voice services over the 2G network or the 3G network according to the dual stack scheme.

In operation 1311, when the electronic device enters the CSFB area, it can provide the LTE service according to the CSFB scheme.

In the above-described embodiment, the electronic device can perform a hybrid access or complex TAU when the service area (or cell) is changed.

In another embodiment, the electronic device may optionally perform a combined access or complex TAU when operating in a dual stack manner. For example, the electronic device may selectively perform a hybrid access or complex TAU based on at least one of the number of service area changes, the complex access, or the complex TAU execution time when the service area is changed. If you do not use a hybrid access or composite TAU, the electronic device may perform attach or TAU.

14 illustrates a procedure for identifying a CSFB area in an electronic device (e.g., electronic device 300 or 1000) located in a legacy service area according to an embodiment of the present invention.

Referring to Fig. 14, at operation 1401, an electronic device (e.g., processor 310 or 1010) confirms entry into the legacy service area. For example, the electronic device can confirm that it enters the legacy service area through cell reselection or handover.

In operation 1403, when the electronic device enters the legacy service area, it connects to the 2G network or the 3G network to provide communication service. At this time, the electronic device can operate in a double-stack manner in a single radio environment.

At operation 1405, the electronic device confirms that it is entering the LTE region. For example, the electronic device can check whether it enters LTE region through periodic LTE network search. As another example, the electronic device can confirm that it enters the LTE area through cell reselection or handover.

In operation 1403, if the electronic device does not enter the LTE area, it can connect to the 2G network or the 3G network according to the double stack scheme to provide communication service.

At operation 1407, when the electronic device enters the LTE region, it performs a combined access or complex TAU.

At operation 1409, the electronic device verifies that it enters the CSFB area using the response signal of the hybrid access or composite TAU. For example, if the electronic device has performed a complex access or a complex TAU, the base station may send information to the electronic device about whether to support circuit-switched (CS) network access for the CSFB in response to a hybrid access or composite TAU. Accordingly, the electronic device can confirm whether or not it enters the CSFB area using the response signal of the hybrid access or composite TAU.

In operation 1403, if the electronic device does not enter the CSFB area, it can provide data services over the LTE network and voice services over the 2G network or 3G network according to the dual stack approach.

At operation 1411, if the electronic device enters the CSFB area, it can provide LTE services according to the CSFB scheme.

15 shows a procedure for identifying a CSFB area in an electronic device (e.g., electronic device 300 or 1000) located in a legacy service area according to an embodiment of the present invention.

Referring to FIG. 15, at operation 1501, an electronic device (e.g., processor 310 or 1010) confirms entry into the legacy service area. For example, the electronic device can confirm that it enters the legacy service area through cell reselection or handover.

At operation 1503, when the electronic device enters the legacy service area, it connects to the 2G network or 3G network to provide communication services. At this time, the electronic device can operate according to the CSFB scheme.

At operation 1505, the electronic device confirms that it is entering the LTE area. For example, the electronic device can check whether it enters LTE region through periodic LTE network search. As another example, the electronic device can confirm that it enters the LTE area through cell reselection or handover. As another example, the electronic device can confirm whether or not it enters the LTE area using the control information provided from the legacy network.

In operation 1503, if the electronic device does not enter the LTE area, it can connect to the 2G network or 3G network to provide communication services.

At operation 1507, when the electronic device enters the LTE region, it performs a combined access or complex TAU.

At operation 1509, the electronic device can verify that it enters the CSFB area using the response signal of the complex access or composite TAU. For example, if the electronic device has performed a complex access or a complex TAU, the base station may send information to the electronic device about whether to support circuit-switched (CS) network access for the CSFB in response to a hybrid access or composite TAU. Accordingly, the electronic device can confirm whether or not it enters the CSFB area using the response signal of the hybrid access or composite TAU.

In operation 1511, when the electronic device enters the CSFB area, it can provide the LTE service according to the CSFB scheme.

In operation 1513, when the electronic device enters the non-CSFB area, it can provide data services over the LTE network and voice services over the 2G network or 3G network according to the dual stack scheme.

According to various embodiments of the present invention, when entering an LTE area that does not support Circuit Switched FallBack (CSFB), the method of operating an electronic device activates a data communication module and a voice communication module to perform a dual stack An operation to provide LTE data service and voice service, an operation to confirm that system information including LTE network information is received through a legacy network, and an operation to receive the system information and recognize entry into an LTE area supporting CSFB , And providing an LTE data service and a voice service according to the CSFB scheme.

In an embodiment of the present invention, the act of activating comprises: connecting to a first network for data service via the data communication module, connecting to a second network for voice service via the voice communication module, Monitoring a control signal from the first network through a module, and monitoring a control signal from the second network through the voice communication module.

In an embodiment of the present invention, the legacy network may be a Global System for Mobile Communications (GSM) network, a Code Division Multiple Access (CDMA) network, a Wideband-CDMA (W-CDMA) network, a Time Division-Synchronous CDMA (TD- Network, or an Evolution-Data Optimized (EV-DO) network.

In an embodiment of the present invention, the operation of confirming that the system information is received may include an operation of confirming that at least one of the SI2quater message or the SI Type 23 message is received.

In a preferred embodiment of the present invention, when system information including the LTE network information is received, an operation of transmitting a combined attach or a combined TAU (combined attaching TAU) receiving the response information for the combined Tracking Area Update, and determining whether to enter the LTE region supporting the CSFB based on the response information.

According to various embodiments of the present invention, a method of operating an electronic device includes transmitting an aggregate attachment or combined TAU (combined tracking area update) when a service area or cell is changed, ) Or composite TAU (combined tracking area update), determining whether to enter the LTE region supporting Circuit Switched FallBack (CSFB) based on the response information, and supporting the CSFB And an operation of providing an LTE data service and a voice service according to the CSFB scheme when it is determined to enter the LTE area.

In an exemplary embodiment of the present invention, the transmitting operation may be performed selectively based on at least one of a service area or cell change count, a hybrid access or a complex TAU execution time when the service area or cell is changed, attach or combined TAU (combined Tracking Area Update).

In the above-described embodiment, when the electronic device enters the CSFB area, the LTE service can be provided using the CSFB scheme.

In another embodiment, the electronic device may provide LTE services in a dual stack manner when entering the CSFB area. For example, if it is possible to connect to a first legacy network (e.g., a 2G network) that supports CSFB in the CSFB region and a second legacy network (e.g., a 3G network) And the second legacy network to provide a communication service. In another example, if a first legacy network (e.g., a 2G network) that supports CSFB in the CSFB area does not support data services and a second legacy network (e.g., 3G network) supports data services, Can provide communication services by connecting to the LTE network and the second legacy network based on the dual stack scheme.

16 illustrates a configuration of a wireless communication system according to an embodiment of the present invention. In the following description, it is assumed that the 2G system does not support the data service, and the 3G system supports the data service. For example, a wireless communication system may include a 2G system area 1600, an LTE system area 1610, a 3G system area 1620-1, 1620-2, and an electronic device 1630.

Referring to Figure 16, an electronic device 1630 (e.g., electronic device 300 or 1000) is coupled to a first area 1610 where a 2G system area 1600, an LTE system area 1610 and a 3G system area 1620-1 overlap, (1641), the electronic device 1630 can connect to the LTE network and the 3G network according to the dual stack scheme to provide communication services. For example, the electronic device 1630 can attach to the LTE network and the 3G network by performing attach and location registration (TAU or LAU (Local Area Update)) to the LTE network and the 3G network, respectively.

According to one embodiment, when the electronic device 1630 moves out of the first area and moves to the second area where the 2G system area 1600 and the LTE system area 1610 overlap (1643), the electronic device 1630 CSFB method to provide a communication service. For example, if the electronic device 1630 operating in idle mode in the first area or providing data service over the LTE network moves to the second area 1643, then the electronic device 1630 may be a composite TAU can be performed to switch to the CSFB scheme. In another example, if the electronic device 1630 providing voice service over the 3G network in the first area is moved to the second area 1643, then the electronic device 1630 hands over the voice service to the 2G network . As another example, if the electronic device 1630 providing voice and data services over the 3G network according to the dual-stack approach in the first region is moved to the second area 1643, then the electronic device 1630 The voice service can be handed over to the 2G network, and the data service can be terminated.

According to one embodiment, when the electronic device 1630 moves out of the second area into the 2G system area 1600 (1645), the electronic device 1630 can connect to the 2G network to provide voice service.

According to one embodiment, when the electronic device 1630 moves from the 2G system area 1600 to the second area 1643, the electronic device 1630 may switch to the CSFB mode to provide communication services. For example, the electronic device 1630 may perform a combined attach or combined TAU (combined Tracking Area Update).

According to one embodiment, when the electronic device 1630 moves from the second area to the first area 1641, the electronic device 1630 may switch to the dual stack mode to provide communication services. For example, if the electronic device 1630 operating in the standby mode in the second area 1630 moves to the first area 1641, the electronic device 1630 registers the location (TAU and LAU) in the LTE network and the 3G network, respectively. Can be performed. In another example, if the electronic device 1630 providing data services over the LTE network in the second region moves to the first area 1641, then the electronic device 1630 maintains a data service connection over the LTE network (TAU and LAU) to the LTE network and the 3G network, respectively. In another example, if the electronic device 1630 providing voice service over the 2G network in the second area moves 1641 to the first area, then the electronic device 1630 hands over the voice service to the 3G network And perform a Routing Area Update (RAU) on the 3G network. If the 2G voice service should be maintained even when moving to the first area based on the service policy, the electronic device 1630 performs location registration (TAU and LAU) in the LTE network and the 3G network after the voice service is terminated .

In one embodiment, when electronic device 1630 moves to a third area 1647 where a 2G system area 1600 and a 3G system area 1620-2 overlap in a first area 1647, A communication service can be provided by connecting to a network. For example, if an electronic device 1630 operating in idle mode in a first zone has moved to a third area 1647, then the electronic device 1630 may perform location registration (RAU and LAU) Can be performed. In another example, if the electronic device 1630 providing data services over the LTE network in the first area 1670 moves to the third area 1647, then the electronic device 1630 hands over the data service to the 3G network . For example, the electronic device 1630 may perform RAUs with a 3G network. In another example, if the electronic device 1630 providing voice service over the 3G network in the first area 1670 moves to the third area 1647, the electronic device 1630 transmits a voice service connection over the 3G network . As another example, if the electronic device 1630 providing voice and data services over the 3G network according to the dual-stack scheme in the first region moves 1647 to the third area, then the electronic device 1630 It is possible to maintain the voice service and the data service connection over the 3G network.

In one embodiment, when electronic device 1630 moves from a third area to a first area 1641, electronic device 1630 may switch to a dual stack mode to provide communication services. For example, if the electronic device 1630 operating in the standby mode in the third zone moves to the first area 1641, then the electronic device 1630 may perform location registration (TAU and LAU) on each of the LTE network and the 3G network, Can be performed. In another example, if the electronic device 1630 providing voice service over the 3G network in the third region has moved to the first area, the electronic device 1630 maintains voice service connection over the 3G network, Routing Area Update (RAU) can be performed on the network. If the voice service is terminated, the electronic device 1630 may perform location registration (TAU) on the LTE network. In another example, if the electronic device 1630 providing voice and data services over the 3G network in the third region has moved to the first area, then the electronic device 1630 may connect voice services over the 3G network Data service connection can be maintained. If the voice service is terminated, the electronic device 1630 may perform location registration (TAU) on the LTE network.

In one embodiment, when electronic device 1630 moves from a first area to a 2G system area 1600 (1645), electronic device 1630 may connect to the 2G network to provide communication services. For example, if an electronic device 1630 operating in idle mode in a first zone has moved to a 2G system area 1600 (1645), then the electronic device 1630 may perform location registration (RAU) Or LAU). In another example, if an electronic device 1630 providing data services over an LTE network in a first region moves to a 2G system area 1600 (1645), then the electronic device 1630 transmits data services to the 2G network Handover, or terminate the data service. In another example, if an electronic device 1630 providing voice service over a 3G network in a first area 1645 moves to a 2G system area 1600, then the electronic device 1630 transmits a voice service Can be handed over.

In one embodiment, when electronic device 1630 has moved (1641) from the 2G system area 1600 to the first area, the electronic device 1630 may switch to a dual stack approach to provide communication services. For example, if the electronic device 1630 operating in the standby mode in the 2G system area 1600 moves to the first area 1641, then the electronic device 1630 registers with the TAU Or LAU). In another example, if the electronic device 1630 providing voice service over the 2G network in the 2G system area 1600 has moved 1641 to the first area, the electronic device 1630 may transmit voice service to the 3G network Handover and perform a Routing Area Update (RAU) on the 3G network. If the 2G voice service needs to be maintained even when moving to the first area based on the service policy, the electronic device 1630 performs location registration (TAU or LAU) to the LTE network and the 3G network after the voice service is terminated . In another example, if an electronic device 1630 providing data services over a 2G network in a 2G system area 1600 moves to a first area 1641, then the electronic device 1630 may transmit data services Or can terminate the data service.

17 illustrates a procedure for providing LTE services based on a dual stack approach in an electronic device (e.g., electronic device 300 or 1000) according to an embodiment of the present invention.

Referring to FIG. 17, at operation 1701, an electronic device (e.g., processor 310 or 1010) may identify the LTE network. For example, the electronic device can check whether the LTE system area is entered or the existence of an accessible LTE network by using a control signal provided through an LTE network or a legacy network.

At operation 1703, the electronic device can identify a connectable 3G network (e.g., a network capable of simultaneously providing data services and voice services). For example, the electronic device can confirm whether there is a connectable 3G network using RAT (Radio Access Technology) information provided through the system information from the LTE network. In another example, the electronic device may perform a 3G network search to determine if there is a 3G network connectable. For example, a connectable 3G network may represent a 3G network in which the strength of a signal received via the 3G network is greater than a reference strength.

At operation 1705, the electronic device may connect to the LTE network and the 3G network in accordance with the dual stack scheme to provide communication services. For example, an electronic device can provide communication services by performing attach and location registration (TAU or LAU) to the LTE network and the 3G network, respectively, according to the dual stack scheme.

In the above-described embodiment, when the electronic device does not support CSFB in a legacy network (e.g., 3G network) capable of simultaneously providing data service and voice service in an LTE network, the electronic device is connected to an LTE network and a legacy network Thereby providing a communication service.

In another embodiment, if the CSFB is supported in a legacy network capable of simultaneously providing data services and voice services in an LTE network, the electronic device may provide communication services according to the CSFB scheme.

In the above-described embodiment, the electronic device can provide the communication service using the dual stack scheme. According to one embodiment, when an electronic device shares a hardware device (e.g., a transceiver module) for communication with an LTE network and a 3G network based on a dual stack approach, the electronic device may be connected to a particular network Priority can be given to control hardware devices. The following description assumes that the priority of the voice service over the 3G network in the electronic device is set higher than the priority of the data service via the LTE network.

18 shows a procedure for providing LTE services in an electronic device (e.g., electronic device 300 or 1000) according to one embodiment of the present invention. In the following description, it is assumed that the LTE system area is included in the 2G system area.

Referring to FIG. 18, at operation 1801, an electronic device (e.g., processor 310 or 1010) may verify the power supply of the electronic device. For example, the electronic device can detect whether the power is turned on by detecting the input of the power button.

At operation 1803, the electronic device can identify the LTE network. For example, the electronic device can use the control signal provided through the LTE network or the legacy network to confirm entry into the LTE system area or existence of an accessible LTE network.

At operation 1805, the electronic device can verify that there is a connectable 3G network. For example, the electronic device can confirm whether there is a connectable 3G network using the RAT information provided through the system information from the LTE network. In another example, the electronic device may perform a 3G network search to determine if there is a 3G network connectable.

At operation 1807, the electronic device can connect to the LTE network and the 3G network according to the dual stack scheme, if there is a 3G network connectable. For example, an electronic device can perform attach and location registration (TAU and LAU) to both the LTE network and the 3G network according to the dual stack approach.

At operation 1809, the electronic device may monitor the LTE network and the 3G network to see if a paging signal for the LTE service or voice service is received based on the dual stack approach.

In operation 1811, the electronic device performs a combined attachment or a combined TAU (combined tracking area update) according to the CSFB scheme when there is no connectable 3G network, and transmits the initial registration to the 2G network, which is the CS network via the LTE network And location registration.

At operation 1813, the electronic device may monitor the LTE network based on the CSFB scheme to see if a paging signal for the LTE service or voice service is received.

Figure 19 illustrates a procedure for providing communication services based on the dual stack approach in an electronic device (e.g., electronic device 300 or 1000) according to an embodiment of the present invention.

Referring to FIG. 19, at operation 1901, an electronic device (e.g., processor 310 or 1010) determines whether the electronic device at operation 1809 of FIG. 18 monitors the LTE network and the 3G network to see if a paging signal for the LTE service or voice service is received. , It is possible to confirm whether a paging signal for voice service is received through the 3G network.

In operation 1809 of FIG. 18, the electronic device can monitor the LTE network and the 3G network to see if a paging signal for the LTE service or voice service is received, if no paging signal for voice service is received over the 3G network.

In operation 1903, if the electronic device receives a paging signal for voice service over the 3G network, it can provide voice service over the 3G network.

In operation 1905, the electronic device may activate the data service of the 3G network when a paging signal for voice service is received over the 3G network. For example, an electronic device can perform RAUs to a 3G network to provide data services over a 3G network. In this case, the electronic device can provide the data service through the 3G network while providing the voice service through the 3G network.

At operation 1907, the electronic device can verify that the voice service is terminated.

In operation 1903 or operation 1905, the electronic device may provide voice or voice and data services over the 3G network if the voice service is not terminated.

In operation 1909, the electronic device may reconnect to the LTE network and activate the data service over the LTE network if the voice service is terminated. For example, an electronic device can perform TAU on an LTE network to activate data services over an LTE network.

At operation 1809 of FIG. 18, the electronic device may monitor the LTE network and the 3G network to see if a paging signal for the LTE service or voice service is received.

20 shows a procedure for providing communication services based on a dual stack approach in an electronic device (e.g., electronic device 300 or 1000) according to an embodiment of the present invention.

Referring to FIG. 20, in operation 2001, when an electronic device (e.g., processor 310 or 1010) monitors a LTE network and a 3G network in which a paging signal for an LTE service or voice service is received in operation 1809 of FIG. 18, It is possible to confirm that the paging signal for the data service is received through the LTE network.

At operation 1809 of FIG. 18, the electronic device can monitor the LTE network and the 3G network to see if a paging signal for the LTE service or voice service is received, if no paging signal for the data service is received over the LTE network.

In operation 2003, when an electronic device receives a paging signal for a data service over an LTE network, it can provide data service over an LTE network.

In operation 2005, the electronic device can verify that a voice service is occurring. For example, the electronic device can check whether the paging signal for voice service is received periodically over the 3G network among the data services through the LTE network. In another example, the electronic device can determine whether an event for a voice call connection is occurring based on the input information detected through the input unit 330 or 1040. [

In operation 2003, the electronic device can provide data services over an LTE network if voice services do not occur. Although not shown, at operation 1809 of FIG. 18, the electronic device can monitor the LTE network and the 3G network to see if a paging signal for the LTE service or voice service is received when the data service is terminated.

In operation 2007, the electronic device may restrict access to the LTE network if voice service occurs. For example, the electronic device may disconnect from the LTE network. As another example, an electronic device may suspend a data service over an LTE network after requesting a data service suspend to the LTE network.

In operation 2009, the electronic device can provide voice service over the 3G network if the connection to the LTE network is restricted.

In operation 2011, if the electronic device has restricted access to the LTE network, it can activate the data service of the 3G network. For example, an electronic device can perform RAUs to a 3G network to provide data services over a 3G network. In this case, the electronic device can provide the data service through the 3G network while providing the voice service through the 3G network.

In operation 2013, the electronic device can confirm that the voice service is terminated.

If the voice service is not terminated, the electronic device can provide voice service or voice service and data service over the 3G network.

In operation 2015, the electronic device can reconnect to the LTE network and activate the data service over the LTE network if the voice service is terminated. For example, an electronic device can perform TAU on an LTE network to activate data services over an LTE network.

At operation 1809 of FIG. 18, the electronic device may monitor the LTE network and the 3G network to see if a paging signal for the LTE service or voice service is received.

21 shows a procedure for switching from an electronic device (e.g., electronic device 300 or 1000) to a CSFB scheme according to an embodiment of the present invention.

Referring to FIG. 21, in operation 2101, when an electronic device (e.g., processor 310 or 1010) monitors the LTE network and the 3G network to see if a paging signal for LTE service or voice service is received at operation 1809 of FIG. 18, It can be confirmed that the connection with the 3G network is inactivated. For example, the electronic device can confirm that it can not access the 3G network based on the state of communication with the 3G network. For another example, the electronic device can be verified that it is outside the 3G system area.

In operation 1809 of FIG. 18, the electronic device may monitor the LTE network and the 3G network to see if a paging signal for the LTE service or voice service is received, if the connection to the 3G network is not disabled.

In operation 2103, if the connection with the 3G network is disabled, the electronic device can switch to the CSFB mode to provide communication services. For example, if the 2G system area 1600 and the LTE system area 1610 are moved to the overlapping second area while monitoring the LTE network and the 3G network based on the dual stack scheme (e.g., standby mode) (1630) can perform the combined TAU and switch to the CSFB scheme. For example, when moving from the first area to the second area, the electronic device 1630 can check if it supports the CSFB from the LTE network to the 2G network. If the electronic device supports CSFB in a 2G network in an LTE network, it can switch to the CSFB scheme by performing a complex TAU.

In operation 1813 of FIG. 18, the electronic device may monitor the LTE network if a paging signal for the LTE service or voice service is received based on the CSFB scheme, when switched to the CSFB scheme.

22 shows a procedure for switching from a dual stack approach to an electronic device (e.g., electronic device 300 or 1000) according to an embodiment of the present invention.

Referring to FIG. 22, at operation 2201, an electronic device (e.g., processor 310 or 1010) monitors the LTE network to see if a paging signal for an LTE service or voice service is received, based on the CSFB scheme, , It is possible to check whether there is a 3G network that can be connected. For example, the electronic device can confirm whether there is a connectable 3G network using the RAT information provided through the system information from the LTE network. For example, when the service area is changed, the electronic device can confirm whether there is a connectable 3G network using the RAT information provided through the system information from the LTE network. In another example, the electronic device may periodically perform a 3G network search to determine if there is a 3G network connectable. In another example, the electronic device may perform a 3G network search during at least some time period of operation while in standby mode to determine if there is an accessable 3G network.

In operation 1813 of Figure 18, the electronic device determines whether paging for an LTE service or voice service based on the CSFB scheme, if there is no 3G network (e.g., a legacy network capable of simultaneously providing data services and voice services) The LTE network can be monitored for signal reception.

At operation 2203, the electronic device may switch to a dual stack mode to provide communication services if there are 3G networks accessible. For example, the 2G system area 1600, the LTE system area 1610, and the 3G system area 1620-1 are overlapped with each other in the first area where the LTE network is being monitored (e.g., standby mode) based on the CSFB scheme In one instance, the electronic device 1630 may perform location registration (LAU) on the 3G network to switch to the dual stack mode. As another example, the electronic device 1630 can perform location registration (TAU or LAU) on each of the LTE network and the 3G network to switch to the dual stack mode.

At operation 1809 of FIG. 18, the electronic device may monitor the LTE network and the 3G network to see if a paging signal for the LTE service or voice service is received when switched to the dual stack approach.

In the above-described embodiment, when there is a legacy network (e.g., a 3G network) capable of simultaneously providing a data service and a voice service while providing a communication service in a CSFB manner, the electronic device can switch to a dual stack mode.

In another embodiment, when there is a legacy network (e.g., 3G network) capable of simultaneously providing a data service and a voice service while providing communication services in a CSFB manner, the electronic device determines whether or not the CSFB is supported in the LTE network to the legacy network Can be confirmed. According to one embodiment, when the CSFB is not supported in the LTE network to the legacy network, the electronic device can switch in a dual stack manner. According to one embodiment, when the CSFB is supported in the LTE network to the legacy network, the electronic device can provide the communication service in the CSFB scheme using the LTE network and the legacy network.

According to various embodiments of the present invention, an operation method of an electronic device includes checking whether there is a legacy network capable of simultaneously providing a data service and a voice service in an LTE network area, and when the legacy network exists, And providing one or more services of a data service or a voice service according to a dual stack scheme based on the LTE network and the legacy network.

In the embodiment of the present invention, when the legacy network exists, it is checked whether the CSFB is supported in the LTE network and the legacy network. When CSFB is supported in the LTE network in the legacy network, And providing at least one of the data service or the voice service.

In an embodiment of the present invention, the operation of providing the service may include providing at least one of a data service or a voice service according to a dual stack scheme when the CSFB is not supported in the LTE network to the legacy network Operation.

In an embodiment of the invention, the legacy network may include one or more of a Wideband-CDMA (W-CDMA) network, a TD-SCDMA (Time Division-Synchronous CDMA) network or an Evolution-Data Optimized have.

In an exemplary embodiment of the present invention, the operation of checking whether the legacy network exists may include checking whether the legacy network exists by using system information provided from the LTE network.

The operation of providing the service in an embodiment of the present invention may include connecting to the LTE network for data service through a data communication module, connecting to the legacy network for voice service through a voice communication module, Monitoring a control signal from the LTE network through a module, and monitoring a control signal from the legacy network via the voice communication module.

If the connection with the legacy network is deactivated in the embodiment of the present invention, checking whether there is another legacy network that can be connected to the legacy network, and if the other legacy network exists, supporting the CSFB in the LTE network to the legacy network And performing a combined TAU (combined tracking area update) when the CSFB is supported by the legacy network in the LTE network, to switch to the CSFB scheme.

In an embodiment of the present invention, the other legacy network may include one or more of a Global System for Mobile Communication (GSM) network or a Code Division Multiple Access (CDMA) network.

In an embodiment of the present invention, if the legacy network does not exist and another legacy network supporting the CSFB of the LTE network exists, the method further includes providing at least one of a data service or a voice service according to the CSFB scheme .

In the embodiment of the present invention, when a service is provided according to the CSFB scheme, an operation of confirming whether or not the legacy network that can be connected exists exists, and an operation of performing location registration with the legacy network when the legacy network exists The method may further include providing at least one of a data service or a voice service according to a dual stack scheme based on the LTE network and the legacy network.

In an embodiment of the present invention, the act of providing the service may include providing data service through the legacy network of the voice service through the legacy network.

While the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the scope of the present invention should not be limited by the illustrated embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

Claims (66)

In operation of the electronic device,
Determining whether the electronic device is located in a first LTE area that is an LTE network supporting circuit switched fallback (CSFB) or a second LTE area that is an LTE network that does not support the CSFB;
And controlling an LTE communication module to support the LTE network based on a result of the determination,
The control operation may include:
Activating the LTE communication module when the electronic device is located in the first LTE area and deactivating the LTE communication module if the electronic device is located in the second LTE area.
The method according to claim 1,
The determining operation may include:
And receiving information about the LTE network over a legacy network.
3. The method of claim 2,
The control operation may include:
If it is determined that the mobile terminal has changed from one area of the first LTE area or the second LTE area to another area based on the information on the LTE network received through the legacy network, Inactive or deactivated to active.
The method according to claim 1,
The control operation may include:
Activating the LTE communication module when the electronic device is located in a legacy network area providing the first LTE area and data service;
And accessing the legacy network and the LTE network in a dual stack manner to provide communication services.
5. The method of claim 4,
Wherein the providing of the communication service comprises:
Providing voice services over the legacy network and providing data services over the LTE network.
5. The method of claim 4,
Wherein the providing of the communication service comprises:
And providing data services over the legacy network when the electronic device provides voice services over the legacy network.
The method according to claim 1,
The control operation may include:
Activating the LTE communication module when the electronic device is located in a legacy network area that does not provide the first LTE area and data service;
And accessing the LTE network to provide a CSFB-based communication service.
In an electronic device,
LTE communication module providing communication service through LTE network;
One or more communication modules for providing communication services over a legacy network;
Determining whether the electronic device is located in a first LTE region that is an LTE network supporting circuit switched fallback (CSFB) or a second LTE region that is an LTE network that does not support the CSFB, and based on a result of the determination, And a processor for controlling an LTE communication module for supporting the network,
Wherein the processor is configured to activate the LTE communication module when the electronic device is located in the first LTE area and to deactivate the LTE communication module if the electronic device is located in the second LTE area, .
9. The method of claim 8,
Wherein the processor is configured to receive information about the LTE network over a legacy network using the one or more communication modules.
10. The method of claim 9,
When it is determined that the first LTE area or the second LTE area is changed to another area based on the information on the LTE network received through the legacy network, A device configured to change a communication module from inactive to inactive or from inactive to active.
9. The method of claim 8,
Wherein the processor activates the LTE communication module when the electronic device is located in a legacy network area providing the first LTE domain and data service and connects to the legacy network and the LTE network in a dual stack manner for communication A device configured to provide services.
12. The method of claim 11,
Wherein the processor is configured to provide voice services over the legacy network and provide data services over the LTE network.
12. The method of claim 11,
Wherein the processor is configured to provide data services over the legacy network if the electronic device provides voice services over the legacy network.
9. The method of claim 8,
The processor activates the LTE communication module when the electronic device is located in the first LTE area and a legacy network area where the data service is not provided and connects to the LTE network to provide a CSFB communication service Configured device.
A method of operating an electronic device,
An operation to deactivate the LTE communication module when entering a LTE area that does not support Circuit Switched FallBack (CSFB);
Confirming that system information including LTE network information is received via a legacy network;
And activating the LTE communication module upon receipt of the system information and acknowledging entry into an LTE region supporting the CSFB.
16. The method of claim 15,
The legacy network may include a 2G communication system including at least one of a Global System for Mobile Communications (GSM) network and a Code Division Multiple Access (CDMA) network, a wideband-CDMA (W- A 3G communication system including at least one of a Synchronous CDMA network or an EV-DO (Evolution-Data Optimized) network.
16. The method of claim 15,
The operation of verifying that the system information is received includes:
RTI ID = 0.0 > SI2quater < / RTI > message or SI Type 23 message is received.
16. The method of claim 15,
The operation of verifying that the system information is received includes:
Accessing the legacy network when the LTE communication module is deactivated;
And confirming that system information including LTE network information is received over the legacy network.
16. The method of claim 15,
The operation of verifying that the system information is received includes:
Receiving scheduling information of system information of the legacy network;
And confirming the presence of at least one of an SI2quater message or an SI Type 23 message in the scheduling information.
16. The method of claim 15,
Wherein the activating the LTE communication module comprises:
And activating the LTE communication module if the system information includes one or more of an SI2quater message or an SI Type 23 message.
16. The method of claim 15,
The operation of verifying that the system information is received includes:
And when the UE is connected to the legacy network, checking whether the system information is received when cell reselection or handover is performed.
16. The method of claim 15,
Further comprising maintaining an inactive state of the LTE communication module if system information including the LTE network information is not received.
16. The method of claim 15,
Receiving combined system information including the LTE network information, transmitting a combined attach or combined TAU (combined tracking area update);
Receiving response information for the combined attach or combined TAU (combined tracking area update);
Further comprising determining whether to enter an LTE region supporting CSFB based on the response information.
16. The method of claim 15,
And providing an LTE data service and a voice service according to a CSFB scheme when the LTE communication module is activated.
In an electronic device,
LTE communication module providing communication service through LTE network;
One or more communication modules for providing communication services over a legacy network;
In case of entering a LTE area that does not support CSFB (Circuit Switched FallBack), the LTE communication module is deactivated, receives system information including LTE network information through the legacy network, and enters an LTE area supporting CSFB And activates the LTE communication module when the mobile station recognizes the mobile station.
26. The method of claim 25,
The at least one communication module may be a Global System for Mobile Communications (GSM) network, a Code Division Multiple Access (CDMA) network, a Wideband-CDMA network, a TD-SCDMA network, A device configured to provide communication services over at least one legacy network of networks.
26. The method of claim 25,
Wherein the processor controls the LTE communication module to be deactivated when the electronic device enters an LTE area that does not support CSFB,
The apparatus being configured to control activation of the LTE communication module when the electronic device is confirmed to enter the LTE area supporting the CSFB through the CSFB area identifier,
26. The method of claim 25,
Wherein the processor is configured to check whether an LTE region supporting the CSFB is entered according to whether at least one of an SI2quater message and an SI Type 23 message is received.
26. The method of claim 25,
Wherein the processor is configured to periodically monitor system information of the legacy network when the LTE communication module is inactivated and connected to the legacy network through the one or more communication modules.
26. The method of claim 25,
Wherein the processor is configured to receive scheduling information of system information of the legacy network through the one or more communication modules and to recognize entry into the LTE area based on the scheduling information.
31. The method of claim 30,
Wherein the processor is configured to determine whether the scheduling information includes one or more of an SI2quater message or an SI Type 23 message,
26. The method of claim 25,
Wherein the processor is configured to receive the system information when performing cell reselection or handover when connected to the legacy network.
26. The method of claim 25,
Wherein the processor is configured to control to maintain the inactive state of the LTE communication module when system information including the LTE network information is not received.
A method of operating an electronic device,
An operation of providing a LTE data service and a voice service according to a dual stack method by activating a data communication module and a voice communication module when entering an LTE area that does not support Circuit Switched FallBack (CSFB);
Confirming that system information including LTE network information is received via a legacy network;
And receiving the system information and recognizing entry into an LTE area supporting CSFB, providing an LTE data service and a voice service according to a CSFB scheme.
35. The method of claim 34,
The activating operation may include:
Connecting to a first network for data service through the data communication module and connecting to a second network for voice service through the voice communication module;
Monitoring a control signal from the first network through the data communication module, and monitoring a control signal from the second network through the voice communication module.
35. The method of claim 34,
The legacy network may be a Global System for Mobile Communications (GSM) network, a Code Division Multiple Access (CDMA) network, a Wideband-CDMA (W-CDMA) network, a Time Division-Synchronous CDMA Evolution-Data Optimized) network.
35. The method of claim 34,
The operation of verifying that the system information is received includes:
RTI ID = 0.0 > SI2quater < / RTI > message or SI Type 23 message is received.
35. The method of claim 34,
Receiving combined system information including the LTE network information, transmitting a combined attach or combined TAU (combined tracking area update);
Receiving response information for the combined attach or combined TAU (combined tracking area update);
Further comprising determining whether to enter an LTE region supporting CSFB based on the response information.
In an electronic device,
A data communication module for data services;
A voice communication module for voice service;
(LTE) data service and a voice service according to a dual stack scheme by activating the data communication module and the voice communication module when entering an LTE area that does not support Circuit Switched FallBack (CSFB) Receiving the system information including the LTE network information through the network and recognizing entry into the LTE area supporting the CSFB, receiving the LTE data service and the voice service according to the CSFB scheme using the data communication module and the voice communication module, And a processor for controlling the processor to control the processor.
40. The method of claim 39,
Wherein the data communication module is connected to a first network for data service and monitors a control signal from the first network,
Wherein the voice communication module is connected to a second network for voice service and monitors a control signal from the second network,
Wherein the data communication module and the voice communication module simultaneously connect to the first network and the second network to monitor the control signal when operating in the dual stack manner.
40. The method of claim 39,
The legacy network may be a Global System for Mobile Communications (GSM) network, a Code Division Multiple Access (CDMA) network, a Wideband-CDMA (W-CDMA) network, a Time Division-Synchronous CDMA Evolution-Data Optimized) network.
40. The method of claim 39,
Wherein the processor is configured to check whether an LTE region supporting a CSFB is entered according to whether or not system information including at least one of an SI2quater message and an SI Type 23 message is received.
A method of operating an electronic device,
Transmitting a combined attach or combined TAU (combined Tracking Area Update) when the service area or cell is changed;
Receiving response information for the combined attach or combined TAU (combined tracking area update);
Determining whether to enter an LTE region supporting Circuit Switched FallBack (CSFB) based on the response information;
And providing an LTE data service and a voice service in accordance with a CSFB scheme when it is determined to enter the LTE area supporting the CSFB.
44. The method of claim 43,
The transmitting operation includes:
A combined attach or combined TAU (combined Tracking Area Update) based on at least one of a service area or cell change frequency, a hybrid access or a complex TAU execution time when the service area or cell is changed Wherein the method comprises transmitting an operation.
A method of operating an electronic device,
Confirming whether there is a legacy network capable of simultaneously providing data service and voice service in the LTE network area;
And providing at least one of a data service or a voice service according to a dual stack scheme based on the LTE network and the legacy network if the legacy network is present.
46. The method of claim 45,
If the legacy network exists, checking whether the CSFB is supported in the LTE network to the legacy network;
Further comprising providing at least one of the data service or the voice service according to a CSFB scheme when supporting the CSFB in the LTE network to the legacy network.
47. The method of claim 46,
The operation of providing the service includes:
And providing at least one of a data service or a voice service according to a dual stack scheme when the CSFB is not supported by the legacy network in the LTE network.
46. The method of claim 45,
Wherein the legacy network comprises at least one of a Wideband-CDMA (W-CDMA) network, a TD-SCDMA (Time Division-Synchronous CDMA) network or an Evolution-Data Optimized (EV-DO) network.
46. The method of claim 45,
Wherein the operation of determining whether the legacy network is present comprises:
And verifying the presence of the legacy network using system information provided from the LTE network.
46. The method of claim 45,
The operation of providing the service includes:
Accessing the LTE network for data services via a data communication module and connecting to the legacy network for voice service through a voice communication module;
Monitoring a control signal from the LTE network via the data communication module and monitoring a control signal from the legacy network via the voice communication module.
46. The method of claim 45,
If the connection to the legacy network is inactivated, confirming that there is another legacy network accessible;
Confirming if the other legacy network exists, supporting the CSFB in the LTE network to the legacy network;
Further comprising performing a combined TAU (combined tracking area update) to switch to a CSFB scheme when supporting the CSFB in the LTE network to the legacy network.
52. The method of claim 51,
Wherein the other legacy network comprises one or more of a Global System for Mobile Communications (GSM) network or a Code Division Multiple Access (CDMA) network.
46. The method of claim 45,
Further comprising providing at least one of a data service or a voice service in accordance with a CSFB scheme if the legacy network does not exist and there is another legacy network supporting the CSFB of the LTE network.
54. The method of claim 53,
Confirming whether or not there is a legacy network connectable when providing a service according to the CSFB scheme;
Performing location registration with the legacy network if the legacy network exists;
Further comprising providing at least one of a data service or a voice service according to a dual stack scheme based on the LTE network and the legacy network.
46. The method of claim 45,
The operation of providing the service includes:
And providing data services over the legacy network among the voice services over the legacy network.
In an electronic device,
A data communication module for data services;
A voice communication module for voice service;
The present invention provides a system and method for providing a data service or a voice service in a dual stack mode based on the LTE network and the legacy network when there is a legacy network capable of simultaneously providing a data service and a voice service in an LTE network area A device configured to include a processor to provide.
57. The method of claim 56,
Wherein if the legacy network is present, the processor checks whether the CSFB is supported by the legacy network in the LTE network, and if the CSFB is supported by the legacy network in the LTE network, A service or the voice service.
58. The method of claim 57,
Wherein the processor is configured to provide at least one of a data service or a voice service according to a dual stack scheme when the CSFB is not supported in the LTE network to the legacy network.
57. The method of claim 56,
Wherein the legacy network comprises at least one of a Wideband-CDMA (W-CDMA) network, a TD-SCDMA (Time Division-Synchronous CDMA) network or an EV-DO (Evolution-Data Optimized) network.
57. The method of claim 56,
Wherein the processor is configured to determine whether the legacy network exists by using system information provided from the LTE network.
57. The method of claim 56,
Wherein the processor is configured to connect to the LTE network for data service via the data communication module and to connect to the legacy network for voice service via the voice communication module and to control from the LTE network via the data communication module, And to monitor the control signal from the legacy network via the voice communication module.
57. The method of claim 56,
The processor checks if there is another legacy network capable of being connected if the connection with the legacy network is inactivated and if the other legacy network exists, checks whether the LTE network supports the CSFB in the legacy network And to perform a combined TAU (combined tracking area update) to switch to the CSFB scheme when supporting the CSFB in the LTE network to the legacy network.
63. The method of claim 62,
Wherein the other legacy network comprises one or more of a Global System for Mobile Communications (GSM) network or a Code Division Multiple Access (CDMA) network.
57. The method of claim 56,
Wherein the processor is configured to provide at least one of a data service or a voice service according to a CSFB scheme if the legacy network does not exist and another legacy network supporting the CSFB of the LTE network is present.
57. The method of claim 56,
Wherein the processor checks whether the legacy network connectable to the legacy network exists when the service is provided according to the CSFB scheme, and performs location registration with the legacy network when the legacy network exists, A device configured to provide at least one of a data service or a voice service in accordance with a dual stack scheme based on a dual stack.
57. The method of claim 56,
Wherein the processor is configured to provide data services over the legacy network of voice services over the legacy network.

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