KR20160145985A - The Apparatus and Method for re-enabling of E-UTRAN service in a wireless communication system - Google Patents

Abstract

The present invention relates to a method for storing an E-UTRAN service. The method for storing an E-UTRAN service comprises the steps of: attempting to register in a circuit switched (CS) network by a terminal operating with a first mode; counting a failure number of the registration attempt when the registration attempt is failed; receiving a message from an E-UTRAN when the failure number of the registration attempt is a threshold number or greater; performing an E-UTRAN capability disabling procedure based on the message; starting a timer to count when a state is converted into an E-UTRAN capability disabling state; and determining whether to perform an E-UTRAN capability re-enable procedure when the counting is completed based on a first value of the timer.

Description

[0001] The present invention relates to a method and an apparatus for restoring an E-UTRAN service in a wireless communication system,

The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for recovering an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) service in a wireless communication system.

As a wireless communication system, an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) is also called an LTE (Long Term Evolution) system. For details of the technical specifications for the wireless communication system, refer to " 3rd Generation Partnership Project (Technical Specification Group Radio Access Network) ".

Referring to FIG. 1, an E-UTRAN includes an Access Gateway (UE) located at the end of a User Equipment (UE), a Node B (eNB), and an E-UTRAN, Hereinafter AG). Typically, a base station may simultaneously transmit multiple data streams for broadcast services, multicast services, and / or unicast services. An interface for transmitting user traffic or control traffic may be used between the base stations. The AG may be divided into a part for handling user traffic and a part for processing control traffic. At this time, a new interface between the AG for processing new user traffic and the AG for processing control traffic can be communicated with each other. Also, the AG manages the mobility of the UE in a TA (Tracking Area) unit, and the TA is composed of a plurality of cells. If the terminal moves from one TA to another TA, it informs AG that the TA where it is located has changed. The CN (Core Network) may be configured as a network node for user registration of AG and UE, and an interface for distinguishing E-UTRAN and CN may be used.

2 is a conceptual diagram illustrating a network structure of an evolved universal terrestrial radio access network (E-UTRAN). Especially, the E-UTRAN system is an evolved system in the existing UTRAN system. The E-UTRAN is composed of one or more base stations (eNBs), and the base stations (eNBs) are connected via an X2 interface. The base station is connected to the terminal through the air interface and is connected to the EPC (Evolved Packet Core) through the S1 interface. EPC is composed of MME (Mobility Management Entity), S-GW (Serving-Gateway) and PDNGW (Packet Data Network-Gateway). The MME has information on the access information of the terminal or the capability of the terminal, and this information is mainly used for managing the mobility of the terminal. The S-GW is a gateway having an E-UTRAN as an end point, and the PDN-GW is a gateway having a PDN (Packet Data Network) as an end point.

On the other hand, GSM has been developed in Europe as a system for standardizing a wireless communication system. At this time, GPRS is a technology for providing a packet switched data service in a circuit switched data service provided by GSM. GSM / GPRS may be a system based on TDMA.

At this time, the GSM cell may be a cell whose RAT is GSM / GPRS, the UTRAN cell may be a cell whose RAT is UTRAN, and the E-UTRAN cell may be a cell whose RAT is E-UTRAN. Various types of RATs can coexist as described above.

The present specification aims at providing a method and apparatus for restoring an E-UTRAN service in a wireless communication system.

It is an object of the present invention to provide a method for preventing unnecessary movement between connected mobiles in a wireless communication system to reduce resource waste of a terminal.

The present specification can provide a stable voice service based on user preference in a wireless communication system.

The present specification has an object to stably provide a user requested service based on E-UTRA capability disabling and capability re-enable.

According to an embodiment of the present disclosure, a terminal can perform E-UTRAN service recovery in a wireless communication system. The method includes the steps of: attempting to register with a terminal operating in a first mode to a circuit switched (CS) network; counting a number of unsuccessful attempts to register if a registration attempt fails; if the number of unsuccessful attempts exceeds a threshold number of times, UTRA capability disabling procedure based on the message; initiating counting of a timer when the E-UTRA disconnection state is entered; receiving a message from the UTRAN, And determining whether to perform an E-UTRA connection re-enable procedure when counting expires based on a first value of a timer.

Further, according to an embodiment of the present invention, a terminal apparatus that performs E-UTRAN service recovery in a wireless communication system may be included. In this case, the terminal may include a receiving module for receiving a message from the base station, a transmitting module for transmitting a message to the base station, and a processor for controlling the receiving module and the transmitting module. At this time, the processor attempts to register with the Circuit Switched (CS) network using the receiving module and the transmitting module in the state of operating in the first mode, counts the number of unsuccessful attempts to register when the attempt to register fails, UTRA capability disabling procedure based on the message, and switches to the E-UTRA access disabled state if the number of times of reception is equal to or greater than the threshold number of times The UE may start counting the timer and determine whether to perform the E-UTRA capability re-enable procedure if the counting expires based on the first value of the timer (Timer) .

In addition, the following points can be commonly applied to a method of restoring the E-UTRAN service in the wireless communication system and a terminal device performing the E-UTRAN service restoration.

In accordance with one embodiment of the present invention, the first value of the timer may be increased by a factor of two each time the timer is reset.

Further, according to an embodiment of the present invention, the first value may increase in a range not exceeding the threshold value.

Further, according to an embodiment of the present invention, the first value of the timer may be set to 6 minutes (min).

In addition, according to an embodiment of the present invention, when the counting based on the first value of the timer expires, whether to perform the E-UTRA connection re-acceptance procedure by comparing the voice service usage amount and the packet service usage amount Can be determined.

In addition, according to an embodiment of the present invention, when the voice service use amount is equal to or greater than the packet service use amount, whether or not to perform the E-UTRA access re-allowance procedure based on the E- You can decide.

Further, according to an embodiment of the present invention, when the network information connectable to the E-UTRA list is included, the E-UTRA connection re-acceptance procedure can be performed.

In addition, according to an embodiment of the present invention, if the network information connectable to the E-UTRA list is not included, the timer may be reset and counted, and the E-UTRA connection re-allowance procedure may not be performed.

Also, according to an embodiment of the present invention, when the voice service usage amount is smaller than the packet service usage amount, the timer may be reset and counted, and the E-UTRA connection re-permission procedure may not be performed.

The present specification can provide a method and apparatus for restoring an E-UTRAN service in a wireless communication system.

The present disclosure can provide a method for reducing unnecessary resource movement between terminals in a wireless communication system.

The present specification can provide a stable voice service based on user preference in a wireless communication system.

The present specification can stably provide a user requested service based on E-UTRA capability disabling and capability re-enable.

The effects obtainable in the present specification are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description will be.

1 is a diagram conceptually showing a network structure of an E-UTRAN according to an embodiment of the present invention.
2 is a conceptual diagram illustrating a network structure of an E-UTRAN according to an embodiment of the present invention.
3 is a diagram illustrating a wireless interface protocol structure between a terminal and an E-UTRAN based on the 3GPP RAN specification according to an embodiment of the present invention.
4 is a diagram illustrating a wireless interface protocol structure between a terminal based on the 3GPP RAN specification and an E-UTRAN according to an embodiment of the present invention.
5 is a diagram illustrating an example of a physical channel structure used in an E-UTRAN system according to an embodiment of the present invention.
FIG. 6 is a diagram illustrating a case of switching to E-UTRA capability disable in one embodiment of the present invention.
FIG. 7 is a diagram illustrating a method of providing services to a terminal based on E-UTRA capability disable and re-enable according to an embodiment of the present invention.
FIG. 8 is a flowchart illustrating a process in which an E-UTRA connection disconnection procedure is performed according to an embodiment of the present invention.
FIG. 9 is a flowchart illustrating a process in which an E-UTRA connection re-grant procedure is performed according to an embodiment of the present invention.
10 is a flow diagram illustrating a method for controlling a timer for E-UTRA connection re-allow according to one embodiment of the present disclosure.
11 is a flowchart illustrating a method in which an E-UTRA connection disconnection and re-admission procedure is performed according to an embodiment of the present disclosure.
12 is a diagram illustrating a method in which an E-UTRA connection re-admission procedure is performed based on voice service usage and packet service usage according to an embodiment of the present invention.
13 is a block diagram of a terminal device and a base station according to an embodiment of the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following detailed description, together with the accompanying drawings, is intended to illustrate exemplary embodiments of the invention and is not intended to represent the only embodiments in which the invention may be practiced. The following detailed description includes specific details in order to provide a thorough understanding of the present invention. However, those skilled in the art will appreciate that the present invention may be practiced without these specific details.

The following embodiments are a combination of elements and features of the present invention in a predetermined form. Each component or characteristic may be considered optional unless otherwise expressly stated. Each component or feature may be implemented in a form that is not combined with other components or features. In addition, some of the elements and / or features may be combined to form an embodiment of the present invention. The order of the operations described in the embodiments of the present invention may be changed. Some configurations or features of certain embodiments may be included in other embodiments, or may be replaced with corresponding configurations or features of other embodiments.

The specific terminology used in the following description is provided to aid understanding of the present invention, and the use of such specific terminology may be changed into other forms without departing from the technical idea of the present invention.

In some instances, well-known structures and devices are omitted or shown in block diagram form around the core functions of each structure and device in order to avoid obscuring the concepts of the present invention. In the following description, the same components are denoted by the same reference numerals throughout the specification.

Embodiments of the present invention may be supported by standard documents disclosed in at least one of IEEE 802 systems, 3GPP systems, 3GPP LTE and LTE-Advanced (LTE-Advanced) systems and 3GPP2 systems, which are wireless access systems. That is, the steps or portions of the embodiments of the present invention that are not described in order to clearly illustrate the technical idea of the present invention can be supported by the documents. In addition, all terms disclosed in this document may be described by the standard document.

The following description will be made on the assumption that the present invention is applicable to a CDMA system such as Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access And can be used in various radio access systems. CDMA may be implemented in radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. The TDMA may be implemented in a wireless technology such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA may be implemented in wireless technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and Evolved UTRA (E-UTRA).

Furthermore, the terms first and / or second, etc. may be used herein to describe various components, but the components should not be limited by the terms. The terms may be named for the purpose of distinguishing one element from another, for example, without departing from the scope of the rights under the concept of the present disclosure, the first element being referred to as the second element, , The second component may also be referred to as a first component.

Also, throughout the specification, when an element is referred to as " including " an element, it means that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise. And the description "... unit", "… Quot; and " part " refer to a unit for processing at least one function or operation, which may be implemented as a combination of hardware and / or software.

3 is a diagram showing a structure of a control plane of a radio interface protocol between a terminal based on the 3GPP radio access network standard and the E-UTRAN, FIG. 4 is a diagram showing a structure of a control plane based on the 3GPP radio access network standard U-Plane (User-Plane) structure of a radio interface protocol between a terminal and an E-UTRAN. In particular, the wireless interface protocol consists of a physical layer, a data link layer, and a network layer vertically, and horizontally includes a user plane for data information transmission and a control plane And a control plane for signal transmission.

The protocol layers of FIGS. 3 and 4 are based on an Open System Interconnection (OSI) reference model widely known in communication systems. The lower three layers are referred to as L1 (first layer), L2 ), And L3 (third layer). The control plane is a path through which control messages used by the UE and the network to manage calls are transmitted. The user plane means a path through which data generated in the application layer, for example, voice data or Internet packet data, is transmitted. Hereinafter, the layers of the control plane and the user plane of the wireless protocol will be described.

The physical layer as the first layer provides an information transfer service to an upper layer using a physical channel. The physical layer is connected to the upper layer of Medium Access Control (MAC) layer through a transport channel. Data is transferred between the MAC layer and the physical layer through the transport channel. Data is transferred between the transmitting side and the receiving side physical layer through the physical channel. The physical channel is modulated by an Orthogonal Frequency Division Multiplexing (OFDM) scheme, and uses time and frequency as radio resources.

The MAC layer of the second layer provides a service to a radio link control (RLC) layer, which is an upper layer, through a logical channel. The RLC layer of the second layer supports reliable data transmission. The function of the RLC layer may be implemented as a function block inside the MAC. In this case, the RLC layer may not exist. The Packet Data Convergence Protocol (PDCP) layer of the second layer performs a header compression function to reduce unnecessary control information for efficient transmission in an air interface having a narrow bandwidth when transmitting IP packets such as IPv4 or IPv6 . A Radio Resource Control (RRC) layer located at the bottom of the third layer is defined only on the control plane and includes a configuration, reconfiguration, and release of radio bearers (RBs) And controls the logical channels, the transport channels, and the physical channels. The radio bearer means a service provided by the second layer for data transmission between the UE and the EUTRAN. To this end, the RRC layer exchanges RRC messages between the UE and the network.

Hereinafter, the RRC state of the UE and the RRC connection method will be described. The RRC state refers to whether or not the RRC of the UE is a logical connection with the RRC of the E-UTRAN. If the RRC is connected, the RRC connection state (RRC_CONNECTED) is established. If not, the RRC idle state (RRC_IDLE) .

Since the E-UTRAN can grasp the presence of the UE in the RRC-connected state on a cell-by-cell basis, the E-UTRAN can effectively control the UE. On the other hand, the E-UTRAN can not grasp the RRC idle terminal in the cell unit, and the CN manages the TA unit, which is a larger area unit than the cell. That is, in order for the UE in the RRC idle state to receive services such as voice or data from the cell, the UE must transition to the RRC connected state. In particular, when the user first turns on the power of the UE, the UE first searches for an appropriate cell and stays in the RRC idle state in the cell. The UE which has stayed in the RRC idle state performs the RRC connection establishment process with the RRC of the E-UTRAN only when it is necessary to establish the RRC connection, and transits to the RRC connection state. Here, the case where the RRC connection needs to be established means that uplink data transmission is required due to a user's call attempt or the like, or when a paging message is received from the E-UTRAN, a response message should be transmitted.

As described above, since the cell selection procedure is performed in a state in which the UE does not currently determine the cell in which the RRC is in the idle state, it is most important to select the cell as quickly as possible. Therefore, even if the cell is not a cell providing the best radio signal quality to the UE, that is, it is an acceptable cell but not a suitable cell, it can be selected in the cell selection procedure of the UE have. On the other hand, if the UE can not perform normal communication due to deteriorated quality of the radio channel or mismatch between the UE and the network, the UE determines that the current communication link is faulty and can start the RRC connection re-establishment procedure.

In the 3GPP standard document TS 36.331, if the UE determines that there is a serious problem with the downlink communication link quality based on the result of radio quality measurement of the physical layer of the UE as an example in which the normal communication can not be performed, Random Access procedure is continuously failed or the uplink data transmission in the RLC sublayer continues to fail and it is determined that there is a serious problem in the uplink transmission, the handover has failed or the message received by the terminal is subjected to an integrity check integrity check, and so on.

Hereinafter, a method for recovering uplink resources after an uplink synchronization state is switched to an asynchronous state based on a specific condition in an RRC connected state and the uplink resources are released will be described later.

5 is a diagram illustrating an example of a physical channel structure used in an E-UTRAN system.

The physical channel is composed of several subframes on the time axis and several subcarriers on the frequency axis. Here, one subframe consists of a plurality of symbols on the time axis. One subframe is composed of a plurality of resource blocks, and one resource block is composed of a plurality of symbols and a plurality of subcarriers. In the E-UTRAN system currently under discussion, a 10-ms radio frame is used and one radio frame is composed of 10 sub-frames. Also, one subframe consists of two consecutive slots. The length of one slot is 0.5 ms, and the TTI (Transmission Time Interval), which is a unit time in which data is transmitted, is 1 ms. Referring to FIG. 5, each subframe may use specific subcarriers of specific OFDM symbols (e.g., first symbol) of a corresponding subframe for a physical downlink control channel (PDCCH), i.e., an L1 / have. FIG. 5 shows an L1 / L2 control information transmission region (PDCCH) 501 and a data transmission region (PDSCH) 502.

The BS and the UE generally transmit and receive data through the PDSCH 502, which is a physical channel, using a DL-SCH, which is mostly a transport channel, except for a specific control signal or specific service data. Data of the PDSCH 502 is transmitted to a terminal (one or a plurality of terminals), and information on how the terminals receive and decode the PDSCH data is included in the PDCCH 501 and transmitted.

For example, when a specific PDCCH 501 is CRC masked with an RNTI (Radio Network Temporary Identity) A, and a radio resource (for example, a frequency location) B and transmission format information C , Transport block size, modulation, coding information, and the like) is transmitted through a specific subframe. In this case, one or more UEs in the corresponding cell monitor the PDCCH 501 using RNTI information it has, and if there is more than one UE having an A RNTI, the UEs receive the PDCCH 501, And receives the PDSCH 502 indicated by B and C through the information of one PDCCH 501. [

FIG. 6 is a diagram illustrating a case of switching to E-UTRA capability disable in one embodiment of the present invention.

The terminal can provide a voice service and a packet-based data service to a user. For example, the service that the terminal can provide and the service that the user requests may be different. At this time, the terminal may have to give priority to the user request service. The UE can set and manage a UE operation mode based on a user request and a service to be performed by the UE. At this time, for example, the terminal operation mode may be set based on whether or not the EPS (Evolved Packet System) is registered. For example, the terminal operating mode may operate in a Packet Switched (PS) mode 1. In this case, the PS mode 1 may be a mode in which the terminal is registered only in the EPS and provides voice-based services. In addition, for example, the terminal operation mode can operate in PS mode 2. In this case, the PS mode 2 may be a mode in which the terminal is registered only in the EPS and provides data-oriented services. As another example, the terminal operating mode may operate in Circuit Switched (CS) / PS mode 1. In this case, the CS / PS mode 1 may be a mode in which the terminal is registered in the EPS and non-EPS services to provide voice-based services. As another example, the terminal operating mode may operate in CS / PS mode 2. In this case, the CS / PS mode 2 may be a mode in which the terminal is registered in the EPS and non-EPS services to provide data-oriented services. That is, the terminal may operate in a different mode depending on which service is important and is not limited to the above-described embodiment.

In this case, for example, the terminal may provide voice service in the E-UTRAN as a mode for providing voice service. At this time, the terminal can provide an IP packet based voice service (voice over LTE) in cooperation with an IMS (IP Multimedia Subsystem) server. In addition, for example, the terminal can provide a voice service by temporarily using a CS network infrastructure capable of providing voice service. This can be called CS fallback. In this case, for example, both of the above-described methods can be provided with high-speed data services in a manner using E-UTRAN.

At this time, for example, the UE may not be able to receive the above two voice services through the E-UTRAN. For example, as described above, the UE may be unable to provide voice service through the E-UTRAN while operating in a mode in which the voice-centric service is provided, such as CS / PS mode 1. At this time, since the UE needs to satisfy the requirement for the voice service of the user in the first place, it may be necessary for the UE to provide the voice service to the UE using a network other than the E-UTRAN network. As an example, the other words may be UTRAN or GERAN networks. At this time, the terminal moves to another network and can provide a voice service to the user. However, if the radio environment of the E-UTRAN improves or voice service support is possible, the terminal can move back to the E-UTRAN and return. However, when the terminal changes the access network, it may not be able to provide a stable voice service based on the change of the network, and terminal resources may be wasted depending on the movement of access networks.

Therefore, the UE can maintain the currently connected network and exclude the movement to the E-UTRAN through the E-UTRA capability disabling process in a certain case. In addition, for example, a state in which the UE can access the E-UTRAN through the E-UTRA capability re-enable procedure based on a certain condition after the UE is switched to the E-UTRA access- And will be described later in this regard.

For example, referring to FIG. 6, a UE can perform an E-UTRA connection disabling procedure under a predetermined condition. More specifically, if the PS data service is no longer needed, the terminal can perform the EPS only detach procedure (S610). At this time, if the terminal completes the detach procedure, It can become a state in which it can not provide any service. That is, the terminal may not support the PS data service. In this case, however, since the user registration is maintained in the terminal, the voice service can be supported using the CS network. That is, the case where the user does not select the data service for the terminal, the user can receive the voice service such as the call through the terminal, but can not receive the data service. At this time, the E-UTRA connection disconnection procedure can be performed as described above. That is, the UE can perform the E-UTRA connection disabling procedure to prevent a situation in which the UE unnecessarily accesses the PS network.

In yet another example, the UE can perform an E-UTRA connection disabling procedure when it is impossible to provide an E-UTRAN service in a specific area (S620). More specifically, EMM (EPS mobility management) cause message. In this case, for example, the EMM cause may be transmitted when the terminal does not allow the EPS service in the PLMN (Public Land Mobile Network) in which the terminal attempts to register. At this time, the terminal can search for another PLMN and try to register again. In addition, for example, when the EPS service is not allowed, the E-UTRA connection disconnection procedure can be performed.

In addition, for example, the terminal can perform the E-UTRA connection disconnection procedure when the EPS service is not allowed in the current tracking area. That is, if the UE can not provide the E-UTRAN service in a specific area, it can receive the message and perform the E-UTRA connection disabling procedure based on the received message.

In addition, if the voice service is not supported in the E-UTRAN, for example, the UE can perform the E-UTRA connection disabling procedure (S630)

More specifically, if the UE successfully registers with the E-UTRAN, but the voice service is not supported through the CS network ('CSFB not preferred' or 'SMS only') as described above, UTRA connection disabling procedure can be performed in the case where it is impossible ('IMS registration is not available', 'voice calls in IMS is not available') (S640)

In addition, if the MS successfully registers in the E-UTRAN but the CS registration fails, the UE can perform the E-UTRA connection disabling procedure if it fails more than the threshold number of times (S650). In this case, The number of thresholds may be a threshold number of times. Also, as an example, the number of thresholds may mean the maximum number of times. The number of times of threshold hold can be five, and is not limited to the above-described embodiment. In addition, if the UE has failed CS / PS registration more than the threshold number of times, the UE can perform the E-UTRA connection disabling procedure (S660). That is, the UE can perform registration from the E-UTRAN to the CS network a certain number of times If it fails, the E-UTRA connection disabling procedure can be performed. A more detailed method will be described below.

In addition, for example, the UE may perform the E-UTRA connection disabling procedure when the CS domain is not available in the E-UTRAN (CS domain not available) (S670).

That is, since the UE can not provide the service (voice service ONLY or voice service priority) requested by the user via the E-UTRAN as in the above-mentioned case, the UE can exclude E-UTRA from the possible access network list, And can provide the user requested service through the network (GERAN or UTRAN).

In addition, when the E-UTRA connection disconnection procedure is performed, the UE may exclude E-UTRA from the connectable network list. That is, an E-UTRA connection disconnection procedure is performed, which means that E-UTRA resources are not used in the access network list except for E-UTRA.

FIG. 7 is a diagram illustrating a method of providing services to a terminal based on E-UTRA capability disable and re-enable according to an embodiment of the present invention.

As described above with reference to FIG. 6, when the UE performs the E-UTRA connection disabling procedure, the UE can exclude E-UTRA from using the resources of the E-UTRA. At this time, the UE can perform an E-UTRA capability re-enable procedure based on a certain condition or a user request. In this case, for example, a certain condition may be the setting of the terminal and the change of the wireless environment. Also, an E-UTRA access reauthorization procedure may be performed to indicate that the E-UTRA resource is re-enabled by including E-UTRA again in the access network list.

For example, referring to FIG. 7, a UE can use a different network (GERAN or UTRAN) while excluding an E-UTRAN connection through an E-UTRAN accessless procedure in an E-UTRAN. In addition, the terminal may allow access to the E-UTRAN through an E-UTRA connection re-grant procedure in another network (GERAN or UTRAN).

FIG. 8 is a flowchart illustrating a process in which an E-UTRA connection disconnection procedure is performed according to an embodiment of the present invention.

FIG. 8 is a diagram showing a sequence when a terminal performs an E-UTRA connection disabling procedure. The UE can find the PLMN registered in the registered PLMN or the same PLMN list in the GERAN or UTRAN when the E-UTRA connection disabling procedure is performed. At this time, if the UE finds a PLMN registered in the PLMN registered in the GERAN / UTRAN or a PLMN included in the same PLMN List of the registered PLMN, it can attempt registration and disable the connection of the E-UTRA. In addition, for example, if the UE fails the registration attempt more than the threshold number of times, the UE can perform the E-UTRA access re-authorization procedure again. That is, if the UE finds the PLMN and fails to register more than a predetermined number of times, it can perform the E-UTRA access re-authorization procedure again.

In addition, if the UE does not find a PLMN included in the PLMN registered in the GERAN / UTRAN or in the same PLMN list of the registered PLMN, or if there is no registered PLMN, the UE can perform the PLMN selection. At this time, if the UE chooses to perform the PLMN selection, the UE can determine whether to perform the PLMN selection including the E-UTRA in the target access network of the PLMN selection according to the cause of the E-UTRA connection disabling procedure .

For example, as described above, if the UE does not use the E-UTRA connection disabling procedure and does not use the E-UTRA connection procedure to perform the EPS service, other connections except for the E-UTRA connection PLMN selection can be performed in the network. That is, the intention of the user is not intended to use E-UTRAN and can be excluded from the selection. In addition, as described above, if the UE is unable to provide a service requested by the user (i.e., voice service) in the currently selected PLMN and performs the E-UTRA connection disabling procedure, the PLMN selection including the E-UTRA can be performed . That is, since the user is provided with a request service, a PLMN capable of providing a user requested service may be found in the E-UTRAN and may be included in the PLMN selection.

In addition, if the UE does not have an appropriate PLMN in the PLMN selection process as described above, the UE can return to the existing PLMN in the E-UTRA. In addition, for example, the UE may periodically search another PLMN that can provide a non EPS service as a user requested service. As an example, the above-described search can be performed by the terminal, and is not limited to the above-described embodiment.

FIG. 9 is a flowchart illustrating a process in which an E-UTRA connection re-grant procedure is performed according to an embodiment of the present invention.

The UE can perform the E-UTRA connection disabling procedure and can be switched to the E-UTRA connection disabled state. At this time, the UE can perform the E-UTRA access re-authorization procedure under a certain condition. In this case, for example, the UE can perform the E-UTRA connection re-acceptance procedure differently depending on the cause of performing the E-UTRA connection disabling procedure. For example, if the terminal restricts the use of the EPS service as a data service, the user of the terminal may desire not to use the EPS service. At this time, the terminal can perform the E-UTRA access re-authorization procedure only when the user or the parent application desires to use the EPS service. That is, the UE can perform the E-UTRA connection re-authorization procedure only when the user explicitly desires.

In addition, for example, the E-UTRA connection disabling procedure can be performed because the terminal can not receive the EPS service. At this time, the UE can perform the E-UTRA connection re-acceptance procedure when the power of the UE is turned on / off or USIM is removed, and the PLMN is switched to a state that is no longer a prohibited PLMN. That is, the UE can perform the E-UTRA connection re-authorization procedure if it can be reset or changed to a new state by power ON / OFF or USIM removal, and can be connected to the PLMN.

In addition, for example, when the terminal is in the E-UTRA connection disabling state based on the E-UTRA connection disabling procedure, the mode of the terminal can be changed. At this time, as described above, the terminal can operate in a mode in which voice service is prioritized or in a mode in which data service is prioritized. In this case, for example, the terminal may be switched from a mode centered on voice service to a mode centered on data service. That is, the user of the UE can prioritize providing data service even if seamless voice service is not provided in E-UTRA. Therefore, since there is no necessity for the GERAN / UTRAN to provide relatively low-speed data service, the UE can perform the E-UTRA connection re-authorization procedure.

As another example, the UE can perform the E-UTRA access re-authorization procedure when the USIM is removed. More specifically, when the USIM of the terminal is removed, the user of the terminal may not be able to use the terminal normally. At this time, if the E-UTRA access re-allowance procedure is favorable for the provision of the emergency service, the E-UTRA access re-acceptance period may be performed and the emergency Service can be provided.

As described above, the UE can include the E-UTRAN in the connectable network by performing the E-UTRA connection re-acceptance procedure, and can provide the service by selecting the most suitable PLMN among the connectable networks. As shown above.

In another example, if the UE's E-UTRA connection disabling procedure is temporarily impossible to register in the CS / PS network or the CS network, the UE attempts an E-UTRA connection re-authorization procedure based on the timer can do. That is, the UE may temporarily be unable to register in the CS / PS network or the CS network, and may be changed to a state in which the UE can receive the service in the E-UTRA network after a predetermined time. Accordingly, there is no need to continuously stay in the E-UTRA access disabled state, and the UE can attempt to access by performing the E-UTRA access re-authorization procedure within a predetermined time. This will be described later.

10 is a flow diagram illustrating a method for controlling a timer for E-UTRA connection re-allow according to one embodiment of the present disclosure.

As described above, the UE can access the E-UTRAN based on the E-UTRA connection re-grant procedure. At this time, as described above, the UE can attempt the E-UTRA access re-authorization procedure based on the timer. The timer may be an E-UTRA capability re-enable timer. At this time, the terminal can prevent unnecessary stay in the E-UTRA connection unacceptable state by using the timer. More specifically, the terminal can remain in the GERAN or the UTRAN without being aware of the situation even though the terminal can receive the service in the E-UTRA network. Therefore, there is a need for the UE to periodically check whether or not the service can be provided in the E-UTRAN, because the user can not receive a desired level of service (in particular, the PS data service) To periodically perform the E-UTRA access re-admission procedure.

For example, although the UE operation mode of the user request service is not changed, the user temporarily using the PS data service while staying in the GERAN or the UTRAN can receive the high-speed data service if the UE returns to the E-UTRAN Services below the expected level can be provided. On the other hand, for a user staying in GERAN or UTRAN and mainly using voice service, the UE may not need to perform the E-UTRA access re-authorization procedure. At this time, when the UE performs the E-UTRA access re-admission procedure based on the timer, the UE can perform a search that does not meet the request of the user, and thus the UE can not stably provide the desired service . Therefore, the UE needs to control the timer in performing the E-UTRA connection re-admission procedure.

More specifically, the UE removes E-UTRA from the accessible network list as an E-UTRA connection unacceptable state through a timer, or deletes E-UTRA from the network list as an E-UTRA access permission status through the E- E-UTRA may be included. At this time, the UE can maintain and manage information on a voice service preference PLMN list as an E-UTRA list. In this case, for example, the voice service priority PLMN list may be a PLMN list capable of providing voice service to the UE through the E-UTRAN. At this time, the PLMN capable of providing voice service through the E-UTRAN may be a PLMN capable of providing voice service through the CS network. At this time, as described above, if the terminal can not provide the voice service through the CS network or can not provide the voice service through the interworking with the IMS server, the terminal can not be included in the PLMN list. At this time, the terminal can be newly registered in the E-UTRAN for a change in location or for other reasons. The terminal can determine whether it can provide voice service over the CS network based on the update result IE in the registered result. Also, the terminal can support the voice service through interworking with the upper application in the terminal and the IMS server. At this time, the IMS registration itself is impossible or the IMS registration succeeds, but the voice service can not be supported. That is, the UE can determine whether the voice service is supported through the processes described above, and the PLMN supported voice service can be included in the voice service preferred PLMN list. At this time, the UE can control the timer using the information on the voice service priority PLMN list.

As another example, the UE can control the timer by comparing the voice service usage amount and the packet service usage amount of the user in the E-UTRA access disabled state. In this case, for example, the voice service usage amount may be summed and managed by a mobile originated (MO) call or an MT (mobile terminated) call method. At this time, the MO call may be a method in which the call is summed and managed based on the time at which the signal connection is maintained after the call is established through the request. In addition, the MT call may be a method of accumulating and managing the time until the set MT call is terminated by receiving the paging of the CS domain. At this time, the voice service usage amount can be initialized when the timer expires. Also, as an example, the packet service usage may be the data service usage. At this time, the UE can accumulate and manage the packet service usage by accumulating and managing the accumulated time after the signal due to the triggered request due to the uplink data is maintained and released. At this time, the packet service usage amount can be initialized when the timer expires.

At this time, the terminal can control the timer through the voice service and the packet service usage amount managed as described above.

More specifically, referring to FIG. 10, a UE can compare a voice service usage amount and a packet service usage amount in an E-UTRA access disabled state through an E-UTRA access disabled procedure. At this time, if the UE has a voice service usage equal to or greater than the packet service usage amount, the UE determines that the UE desires to receive the voice service stably, restarts the timer, and does not perform the E-UTRA connection re- . That is, the terminal may stay in GERAN or UTRAN. In addition, for example, if the voice service usage is smaller than the packet service usage amount, the UE can perform the E-UTRA access re-acceptance procedure. That is, the UE can attempt to access the E-UTRAN capable of receiving data at high speed.

In this case, for example, the method of comparing the voice service usage amount and the packet service usage amount may be an equivalent comparison method. In addition, for example, voice service usage and packet service usage may be compared based on different criteria. For example, the voice service usage amount and the packet service usage amount can be standardized and compared according to a certain standard, and are not limited to the above-described embodiments.

In addition, for example, when the terminal restarts the timer, the set value of the timer may be increased to twice the previous value. At this time, the set value of the timer can not be increased beyond the threshold value. At this time, the threshold value may be a threshold value. The threshold value of the timer may be a value received from the E-UTRAN by the UE. At this time, for example, the threshold value of the timer may be 54 minutes. As another example, the initial value of the timer may be six minutes. That is, the timer can be doubled with each initialization based on the initial value of 6 minutes and can be increased up to 54 minutes before the threshold value. However, the set value of the above-mentioned timer may be one example, and is not limited to the above-described embodiment.

The UE can double the value when the timer is restarted. Accordingly, the UE determines that the frequency with which the user uses the voice service is high and continuously maintains the disabled state of the E-UTRA, .

11 is a flowchart illustrating a method in which an E-UTRA connection disconnection and re-admission procedure is performed according to an embodiment of the present disclosure.

According to the present invention, in a method for a terminal to perform an E-UTRA connection disassociation procedure and a connection re-permission procedure, a terminal operating in a first mode may attempt to register with the CS network (S1110) Mode may be a mode in which voice service is given priority as described above. For example, CS / PS mode 1 may be used. Also, the terminal may be attempting to register with the CS / PS network, as described above.

Next, if the CS / PS registration attempt or the CS registration attempt fails, the terminal may count the number of unsuccessful registration attempts (S1120)

Next, the terminal can determine whether the number of registration attempts has failed more than the threshold number of times (S1130). At this time, the threshold number of times may be a threshold number. In addition, for example, the number of times of threshold hold may be five, but is not limited to the above-described embodiment.

Next, if the number of failed registration attempts is equal to or greater than the threshold number of times, the UE can receive the message from the E-UTRAN and perform the E-UTRA connection disabling procedure (S1140). At this time, When the UTRA connection disconnection procedure is performed, the UE can exclude the E-UTRAN from the access network list. Also, the message received by the E-UTRAN may be a rejection message. That is, the UE can perform the E-UTRA connection disabling procedure based on the number of registration failure times among several causes for performing the E-UTRA connection disconnection procedure.

Next, the UE can count the timer when it is switched to the E-UTRA access-disabled state (S1150). In this case, the timer can be set to the first value. In addition, for example, the first value may be 6 minutes and is not limited to the above-described embodiment. That is, the terminal can count the timer until it reaches the first value.

Next, the UE can determine whether to perform the E-UTRA connection tolerance when counting expires based on the first value of the timer (S1120).

12 is a diagram illustrating a method in which an E-UTRA connection re-admission procedure is performed based on voice service usage and packet service usage according to an embodiment of the present invention.

The terminal may expire the counting based on the first value of the timer. (S1210) At this time, as described above, the terminal can count the timer and end the counting when the count reaches the first value.

Next, the terminal can compare the voice service usage amount and the packet service usage amount (S1220). As described above, the terminal accumulates and manages the voice service usage amount and the packet service usage amount, and compares them.

Next, if the voice service usage is greater than the packet service usage, the UE can determine whether network information is included in the E-UTRA list (S1230). If the voice service usage is greater than the packet service usage, The user may have a desire to receive voice service reliably. Accordingly, the UE needs to guarantee a stable voice service by determining that the user has a high demand for voice service in GERAN or UTRAN. At this time, the UE can determine whether the network information is included in the E-UTRA list and determine whether to perform the E-UTRA connection re-authorization procedure.

Next, when the network information is included in the E-UTRA list, the UE can perform the E-UTRA connection re-admission procedure (S1240). At this time, as described above, the E-UTRA list includes the voice service priority PLMN List. At this time, the UE can check whether there is a PLMN ID available as valid information in the PLMN list. At this time, if there is a PLMN available, the UE can provide a voice service to the UE in the corresponding PLMN of the E-UTRA, and the UE can perform the E-UTRA connection re-grant procedure. That is, the terminal can provide stable voice service to the user through E-UTRA.

Next, if the voice service usage is smaller than the packet service usage or the voice service usage is larger than the packet service usage but the network information is not included in the E-UTRA list, the UE resets and counts the timer, (S1250). That is, the UE can determine that the user can not provide a stable voice service through the E-UTRA and can maintain the connection in the GERAN or the UTRAN.

At this time, for example, when the timer is reset, the first value may be doubled. In addition, for example, the first value may increase to less than or equal to the threshold value, and is not limited to the above-described embodiment.

In addition, when the UE performs the E-UTRA access re-acceptance, the UE may include E-UTRA in the allowed access network and search for all currently available PLMNs in all access networks. The UE can select the best PLMN among all the PLMNs searched. Also, if the selected PLMN exists in the E-UTRAN, the UE can select the corresponding PLMN and perform the registration procedure in the E-UTRAN. If the voice service in the E-UTRAN is possible according to the registration result, the terminal can provide the user requested service (including the voice service) to the user in the E-UTRAN. If the voice service in the E-UTRAN is not possible according to the registration result, the terminal can perform the E-UTRA connection disabling procedure again.

13 is a block diagram of a terminal device and a base station according to an embodiment of the present invention.

The terminal 100 may include a transmitting module 110 for transmitting a radio signal, a receiving module 130 for receiving a radio signal, and a processor 120 for controlling the transmitting module 110 and the receiving module 120 . The base station 200 includes a transmission module 210 for transmitting a radio signal, a reception module 230 for receiving a radio signal, and a processor 220 for controlling the transmission module 210 and the reception module 230 . At this time, the terminal 100 and the base station 200 can transmit and receive digital data such as contents and messages using the transmission modules 110 and 210 and the reception modules 130 and 230. Also, according to one embodiment of the present disclosure, the base station 200 may be a base station 200 included in at least one of E-UTRAN, GERAN and UTRAN.

According to an embodiment of the present invention, the processor 120 of the terminal 100 may attempt to register with the CS network using the receiving module and the transmitting module in a state of operating in the first mode. In addition, the processor 120 of the terminal 100 can count the number of failed registration attempts if the registration attempt fails. In addition, the processor 120 of the terminal 100 can receive a message from the E-UTRAN using the receiving module if the number of unsuccessful registration attempts exceeds the threshold number of times. In addition, the processor 120 of the terminal 100 may perform an E-UTRA capability disabling procedure based on the message. The processor 120 of the terminal 100 starts counting the timer when the E-UTRA connection is disabled, and when the counting is expired based on the first value of the timer, It may decide whether or not to perform the UTRA connection granting procedure, as described above.

The processor 120 of the terminal 100 compares the voice service usage amount and the packet service usage amount when the counting is expired based on the first value of the timer to determine whether to perform the E-UTRA access permission procedure Can be determined. At this time, if the voice service usage is greater than or equal to the packet service usage, the processor 120 of the AT 100 determines whether to perform the E-UTRA access permission procedure based on the E-UTRA list of voice service priority . The processor 120 of the terminal 100 performs the E-UTRA access permission procedure when the network information that can be connected to the E-UTRA list is included, and if the network information that can be connected to the E-UTRA list is not included, Reset, counts, and does not perform the E-UTRA connection permitting procedure.

The above-described embodiments of the present invention can be implemented by various means. For example, embodiments of the present invention may be implemented by hardware, firmware, software, or a combination thereof.

In the case of hardware implementation, the method according to embodiments of the present invention may be implemented in one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs) , FPGAs (Field Programmable Gate Arrays), processors, controllers, microcontrollers, microprocessors, and the like.

In the case of an implementation by firmware or software, the method according to embodiments of the present invention may be implemented in the form of a module, a procedure or a function for performing the functions or operations described above. The software code can be stored in a memory unit and driven by the processor. The memory unit may be located inside or outside the processor, and may exchange data with the processor by various well-known means.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The foregoing description of the preferred embodiments of the present invention has been presented for those skilled in the art to make and use the invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that Accordingly, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention.

In this specification, both the invention and the method invention are explained, and the description of both inventions can be supplemented as necessary.

100: terminal device
110: Transmission module of the terminal device
120: Processor of the terminal device
130: Receiving module of the terminal device
200: base station device
210: Transmission module of the base station apparatus
220: processor of the base station apparatus
230: receiving module of the base station apparatus

Claims (15)

A method for restoring an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) service in a wireless communication system,
Attempting to register the terminal operating in the first mode in a Circuit Switched (CS) network;
Counting the number of failed registration attempts if the registration attempt fails;
Receiving a message from the E-UTRAN if the number of failed registration attempts exceeds a threshold number of times;
Performing an E-UTRA capability disabling procedure based on the message;
Initiating counting of a timer when the E-UTRA connection is disabled; And
And determining whether to perform the E-UTRA capability re-enable procedure if the counting expires based on a first value of the timer. UTRAN service recovery method. The method according to claim 1,
Wherein the first value of the timer increases by a factor of two each time the timer is reset. 3. The method of claim 2,
Wherein the first value increases in a range not exceeding a threshold value. The method according to claim 1,
Wherein the first value of the timer is set to 6 minutes (min). The method according to claim 1,
Determining whether to perform the E-UTRA connection re-grant procedure;
Determining whether to perform the E-UTRA connection re-acceptance procedure by comparing a voice service usage amount and a packet service usage amount when the counting is expired based on a first value of the timer, UTRAN service recovery method. 6. The method of claim 5,
And determining whether to perform the E-UTRA connection re-acceptance procedure based on the E-UTRA list for the voice service priority if the voice service usage is greater than or equal to the packet service usage amount, How to recover. The method according to claim 6,
Wherein the E-UTRAN connection re-acceptance procedure is performed when the network information that can be connected to the E-UTRA list is included. The method according to claim 6,
And counting the timer by resetting the timer if the network information connectable to the E-UTRA list is not included, and does not perform the E-UTRAN connection re-authorization procedure. 6. The method of claim 5,
And counting the timer by resetting the timer if the voice service usage amount is smaller than the packet service usage amount, and does not perform the E-UTRAN connection re-authorization procedure. A terminal apparatus for restoring an Evolved-Universal Terrestrial Radio Access Network (E-UTRAN) service in a wireless communication system,
A receiving module for receiving a message from a base station;
A transmission module for transmitting a message to a base station; And
A processor for controlling the receiving module and the transmitting module,
The processor comprising:
Attempts to register in a Circuit Switched (CS) network using the receiving module and the transmitting module in a state of operating in a first mode,
Counting the number of times of unsuccessful registration attempts if the registration attempt fails,
Receiving a message from the E-UTRAN using the receiving module if the number of failed registration attempts is equal to or greater than a threshold number of times,
Performs an E-UTRA capability disabling procedure based on the message,
When the E-UTRA access-disabled state is entered, counting of a timer starts,
And determines whether to perform the E-UTRA capability re-enable procedure if the counting expires based on the first value of the timer (Timer), performing E-UTRAN service recovery . 11. The method of claim 10,
Wherein the first value of the timer increases by a factor of two each time the timer is reset. 12. The method of claim 11,
Wherein the first value increases in a range not exceeding the threshold value. 11. The method of claim 10,
The processor comprising:
And determining whether to perform the E-UTRA connection re-acceptance procedure by comparing the voice service usage amount and the packet service usage amount when the counting is expired based on the first value of the timer (Timer) A terminal device performing recovery. 14. The method of claim 13,
The processor comprising:
And determining whether to perform the E-UTRA connection re-acceptance procedure based on the E-UTRA list for the voice service priority if the voice service usage is greater than or equal to the packet service usage amount, A terminal device performing recovery. 15. The method of claim 14,
Performing the E-UTRA connection re-acceptance procedure if network information connectable to the E-UTRA list is included,
Wherein the E-UTRAN service reestablishment step does not perform the E-UTRAN connection re-acceptance procedure by resetting and counting the timer if network information connectable to the E-UTRA list is not included.

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