KR101767483B1 - Method for improving sip registration of ue in a wireless access system - Google Patents

Abstract

The present invention relates to a wireless communications system and, more specifically, to a method for ensuring a session initiation protocol registration (SIP) process performed by a terminal providing a VoLTE service. According to an embodiment of the present invention, the method for SIP registration of a terminal in a wireless communications system comprises the following steps: receiving a message for commanding network re-access (re-attach) from a network; performing access (attach) to the network in response to the message; and performing an SIP registration procedure. When a first field of the message is set as a certain value, the step of performing an SIP registration procedure may comprise a step of initializing a specific stack involved in the SIP registration procedure.

Description

TECHNICAL FIELD [0001] The present invention relates to a method for improving session initiation registration in a wireless communication system,

The present invention relates to a wireless communication system, and more particularly, to a method for assuring a session initiation registration procedure performed by a terminal providing a VoLTE service.

The LTE (Long Term Evolution) network is divided into the LTE (E-UTRAN) related technologies and the EPC (Enhanced Packet Core) . Since the LTE network is an E2E all-IP network, all traffic flows from a wireless link that a user terminal connects to a base station to a packet data network (PDN) that connects to a final service provider operate on an IP basis.

Voice over LTE (VoLTE) is a representative service based on LTE. This is a technology that enables voice communication like existing circuit network in LTE, which is a high-speed data communication packet network. The quality of the communication is guaranteed by the same method as the MVoIP call, and the connection speed is faster than that of the conventional circuit call method and the quality of the call sound is greatly improved.

An indispensable part of VoLTE is the IP Multimedia Subsystem (IMS) platform. The packet data service is transmitted to the IP network via the LTE network to support all packet services. However, 3GPP has defined a platform called IMS to optimize specific voice services, video streaming services, or manage resources efficiently.

IMS-based services use the Session Initiation Protocol (SIP) protocol. If a conventional CS (Circuit-Switched) call was peer-to-peer (P2P) between a user and a user, VoLTE is a method in which all users using the IMS register with the server and then communicate with registered users. For example, a messenger can be easily explained. Messenger can not be used unless the user registers with the service. You must go through the registration process. Assuming you use voice services through this registration process, you should run another application, but it is not. This is because, when most of the operators first turn on the terminal, the LTE network is first connected and the IMS registration is compulsorily executed. The terminal also works in this way. When the user turns on the terminal, the SIP protocol is registered to the IMS network above the TCP IP. When the user wants to communicate with the other party, the called party dials the desired number and the intermediate SIP protocols are requested to the other party's user. When the bell rings through this process, the actual voice data is exchanged. Also, when the button to hang up the call is pressed, the call is automatically terminated with the message 'Bye' on the protocol.

In summary, the terminal must succeed in initial registration of SIP to the server for VoLTE service, and periodically update registration after registration. However, the registration process can not be successfully updated due to malfunction of the terminal, and the registration information of the terminal is deleted from the server (for example, HSS: Home Subscriber Server), resulting in a state discrepancy between the terminal and the server.

In this case, a detach message indicating that re-attach of the attach process is automatically required is automatically transmitted to the terminal in the network of the specific provider so that the terminal attempts to perform the LTE attach and SIP registration procedure have.

However, in spite of such a detach message, the UE performs only the LTE attach operation and does not perform the SIP registration procedure. In such a case, there is a case where the power is turned off or on, or the air conditioner is set to normal after the airplane mode is set. However, the user can immediately notify the user of the inability to make a call at the time of calling, There is also a problem that it is difficult for a user to recognize a state in which an incoming call is not possible.

The present invention is intended to provide a method and a device for performing LTE services more efficiently in a wireless communication system.

In particular, the present invention provides a method for ensuring the execution of a SIP registration procedure of a terminal and an apparatus for performing the same, for a normal operation of a terminal providing an IMS-based service.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

A SIP registration method of a terminal in a wireless communication system according to an embodiment of the present invention includes: receiving a message instructing a network re-attach from a network; Performing an attach to the network in response to the message; And performing a SIP registration procedure.

Here, when the first field of the message is set to a specific value, performing the SIP registration procedure may include initializing a specific stack involved in the SIP registration procedure.

In addition, in a wireless communication system according to an embodiment of the present invention, a method for supporting SIP registration of a terminal in a wireless communication system includes: if the periodic SIP registration of the terminal is not performed, Requesting a first network entity to manage a first message transmission to a second network entity that manages mobility; The second network entity transmitting the first message to the terminal according to the first request; When the SIP registration of the terminal is not performed for a predetermined time after the first request, the first network entity requests a second message transmission to the second network entity; And delivering the second message such that the second network entity initiates a specific stack associated with the SIP registration procedure of the terminal according to the second request.

In addition, a terminal device performing a SIP registration (Session Initiation Protocol Registration) procedure in a wireless access system according to an embodiment of the present invention includes a modem layer for controlling a modem for exchanging signals with a network; And an application protocol layer having a first stack participating in the SIP registration procedure and a modem interface provision layer (RIL) providing an interface to the modem. Here, when the modem receives a message in which the first field is set to a specific value from the network, the modem layer notifies the modem interface providing layer (IPC) via Inter-Process Communication RIL), and the modem interface providing layer may transmit an intent corresponding to the delivered IPC to the first stack so that the first stack is initialized.

According to at least one embodiment of the present invention, an IMS-based LTE service can be provided more efficiently.

In particular, in order to provide an IMS-based service of a terminal, if the terminal does not normally perform the SIP registration procedure, the present invention resets the SIP registration related stack, so that the execution of the SIP registration procedure can be assured.

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

1 is a configuration diagram of an LTE network according to the present invention.
FIG. 2 is a view for explaining traffic flows on an LTE network for facilitating understanding of the present invention. FIG.
3 is a diagram for explaining an IP address assignment method in an LTE network for facilitating understanding of the present invention.
FIG. 4 is a diagram for explaining an IP address assignment procedure to help understand the present invention.
5 is a flowchart illustrating an example of a process in which a terminal performs SIP registration in a general LTE system.
FIG. 6 shows an example of an internal operation procedure of the UE for ensuring SIP re-registration according to an embodiment of the present invention.
7 is a flowchart illustrating an example of an operation procedure of a terminal according to an embodiment of the present invention.
8 is a block diagram showing an example of a structure of a transmitting end and a receiving end that can be applied to the embodiments of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

Before describing specific embodiments of the present invention, a LTE network configuration diagram will be described first.

1 is a configuration diagram of an LTE network according to the present invention.

1, an LTE network includes a UE (User Equipment) 10, an Evolved Node B (eNB) 20, an S-GW (Serving Gateway) 30, a Packet Data Network Gateway An MCS (Mobility Management Entity) 50, an HSS (Home Subscriber Server) 60, an SPR (Subscriber Profile Repository) 70, an OFFCS (Offline Charging System) 80, an OCS (Online Charging System) (Policy and Charging Rule Function, 100).

The UE 10 is an LTE user terminal and is connected to the LTE Uu interface 15 with the eNB 20. Here, the LTE Uu interface 15 defines a control plane for transmitting and receiving a control message as a wireless interface and a user plane for providing user data.

The eNB 20 provides a radio interface to the UE 10 and provides radio resource management functions such as radio bearer control, radio admission control, dynamic radio resource allocation, load balancing and inter-cell interference control do.

The S-GW 30 is an end point of an evolved universal terrestrial radio access network (E-UTRAN) and an evolved packet core (EPC), and an anchor point at handover between the eNB 20 and the 3GPP system do. The E-UTRAN comprises at least one eNB 20, and the EPC comprises an S-GW 30, a P-GW 40 and an MME 50.

The P-GW 40 connects the UE 10 to an external PDN (Packet Data Network) 110 and performs a packet filtering function. In addition, the P-GW 40 assigns an IP address to the UE 10 and operates as a mobility anchoring point when performing handover between the 3GPP system and the non-3GPP system. In particular, the P-GW 40 receives the Policy and Charging Control (PCC) rule from the PCRF 100, applies it to the corresponding service flow, and provides the billing function per UE 10 / SDF (Service Date Flow) do.

The HSS 60 provides a user profile and a user profile to the MME 50 as a database of subscriber profiles.

The SPR 70 provides subscriber and subscription related information to the PCRF 100, and the PCRF 100 generates subscriber based PCC rules using the subscriber and subscription related information.

OFCS 80 provides charging information based on CDR (Charging Data Record).

OCS 90 provides volume, time, and event-based billing functions through real-time credit control.

The PCRF 100 provides policy control decisions and billing control functions as entities that perform policy and billing control. The PCC rules generated in the PCRF 100 are transmitted to the P-GW 40.

Hereinafter, the interface between the elements constituting the LTE network will be briefly described.

The LTE-Uu 15 provides a control plane and a user plane with a radio interface between the UE 10 and the eNB 20. [

The S1-U 25 is an interface between the eNB 20 and the S-GW 30, and provides a user plane. At this time, GTP tunneling per bearer is provided.

S5 35 is an interface between the S-GW 30 and the P-GW 40, providing a control plane and a user plane. At this time, the user plane provides bearer-specific GTP tunneling, and the control plane provides GTP tunnel management.

SGi 45 defines a user plane and a control plane as an interface between the P-GW 40 and the PDN 110. In the user plane, IETF based IP packet forwarding protocol is used, and in the control plane, protocols such as DHCP and RADIUS / Diameter are used.

S11 55 defines a control plane as an interface between the MME 50 and the S-GW 30, and GTP tunneling per bearer is provided.

X2 65 is an interface between the two eNBs 20, providing a control plane and a user plane. The X2-AP protocol is used in the control plane and the GPRS tunneling protocol (GTP) per bearer for data forwarding in the X2 handover in the user plane.

S6a (75) is provided with a control plane as an interface between the HSS 60 and the MME 50, and is used for exchanging UE subscription information and authentication information.

The Gx 85 is an interface between the PCRF 100 and the P-GW 40. The control plane is defined and used to convey policy control rules and billing rules for QoS (quality of service) policy and billing control .

Sp (95) is an interface between the SPR 70 and the PCRF 100, in which a control plane is defined and used to convey a user profile.

Gz 105 is an interface between the OFCS 80 and the P-GW 40 and defines a control plane and is used for CDR transmission from the P-GW 40 to the OFCS 80. [

Gy 115 is an interface between the OCS 90 and the P-GW 40. The control plane is defined and used for real-time credit control information exchange.

FIG. 2 is a view for explaining traffic flows on an LTE network for facilitating understanding of the present invention. FIG.

More specifically, Figure 2 shows the Internet traffic flow in the user plane of the LTE network reference model. Reference numeral 200a denotes a traffic flow from the UE 10 to the Internet, hereinafter referred to as "uplink traffic flow", 200b denotes a traffic flow from the Internet to the UE 10, hereinafter referred to as " Business card.

IP packets are transmitted over the GTP tunnel on the S1-U (25) and S5 (35) interfaces, respectively. Here, the GTP tunnel is set for each EPS bearer through control signaling when the UE 10 initially connects to the LTE network.

Since several EPS bearers are set on one of the S1-U 25 and the S5 (35) interfaces, a tunnel endpoint identifier (TEID) is allocated upwardly and downwardly in each GTP tunnel establishment to distinguish them. When a GTP tunnel is set in the S1-U (25) interface, a TEID (UL S1-TEID) having an end point is allocated to the S-GW 20 upward and a TEID (DL S1-TEID) having an end point is allocated to the eNB 20 -TEID). Similarly, when a GTP tunnel is established in the S5 (35) interface, a TEID (UL S5-TEID) having an end point in the P-GW 40 and a TEID (DL S5-TEID) having an end point in the S- S5-TEID).

The eNB 20, the S-GW 30 and the P-GW 40 transmit a GTP tunnel header to the GTP packet header when the user IP packet is transmitted through the GTP tunnel on the S1-U 25 and the S5 When it is generated, it inserts the allocated TEID and transmits it. The S-GW 30 must have mapping information between the UL S1-TEID and the UL S5-TEID in order to terminate the S1-GTP tunnel in the upward direction and to transmit the user IP packet to the S5-GTP tunnel. Likewise, in the downlink, mapping information between DL S5-TEID and DL S1-TEID must be maintained.

Hereinafter, referring to FIG. 2, a procedure for each entity to process uplink and downlink Internet traffic flows will be described in detail.

First, in the uplink, the UE 10 transmits internally generated user IP packets to the eNB 20 via the LTE-Uu 15 interface. The eNB 20 constructs an S1 GTP header having the S-GW IP address as the destination address, the eNB 20 address as the originating address, the UL S1-TEID as the TEID, and adds the S1 GTP header to the received user IP packet. To the S-GW 30.

When receiving the user IP packet through the S1 GTP tunnel, the S-GW 30 transmits the IP address of the P-GW 40 to the destination address, the S-GW 30 to the originating address, and the UL S5-TEID to the S5 Configure the GTP header. Then, the S5 GTP header is added to the user IP packet and transmitted to the P-GW 40 through the S5 GTP tunnel.

Subsequently, the P-GW 40 controls the S5 GTP header to extract user IP packets, and then transmits them to the Internet through IP routing.

Referring to the downlink traffic flow, the P-GW 40 receives a user IP packet directed to the UE 10 via the Internet. The P-GW 40 adds the S5 GTP header having the S-GW IP address as the destination address, the P-GW IP address as the sending address and the DL S5-TEID as the TEID to the user IP packet, To the S-GW 30.

The S-GW 30 adds the eNB IP address to the destination IP address, the source address of the S-GW IP address, and the S1 GTP header including the DL S1-TEID with the TEID to the user IP packet received through the S5 GTP tunnel, To the eNB 20 via the GTP tunnel.

The eNB 20 transmits the user IP packet from which the S1 GTP header has been removed to the UE 10 via a data radio bearer (DRB), which is a bearer on the radio link.

It should be noted that the GTP tunnel shown in FIG. 2 is a user plane GTP tunnel for transmitting a user IP packet, hereinafter referred to as a "GTP-U tunnel ".

3 is a diagram for explaining an IP address assignment method in an LTE network for facilitating understanding of the present invention. More specifically, FIG. 2 illustrates a method for allocating an IP address to a user terminal in a LTE network when a user terminal accesses an LTE network in the LTE network. The method includes a Dynamic IP Address Allocation ) Method and a static IP address allocation method.

Generally, the UE 10 requests a connection of the PDN 110 to the LTE network upon initial connection to the LTE network. The P-GW 40 assigns an IP address - that is, a PDN address - to be used by the UE 10 to provide the PDN 110 connection to the UE 10 and delivers it to the UE 10. Here, the PDN address is transmitted from the P-GW 40 to the UE 10 in the process of setting a default bearer between the P-GW 40 and the UE 10, and the UE 10 transmits the PDN The PDN 110 can access the service provided by the PDN 110 using the address.

The P-GW 40 allocates an IP address to the UE 10 by a dynamic IP address allocation method that is dynamically generated each time the UE 10 accesses the LTE network, There is a fixed IP address assignment method in which the subscriber profile stored in the HSS 60 is referred to when the UE 10 connects to the LTE network.

More specifically, as shown in FIG. 3, when a UE accesses an LTE network after a provider configures an IP pool in the P-GW 40 in advance, And assigns an IP address dynamically.

On the other hand, in the fixed IP address assignment method, when a user joins a service provider network, a service provider allocates an IP address to be permanently used to the UE 10 and maintains the IP address in the HSS 60. When the UE 10 accesses the LTE network, The GW 40 receives the IP address corresponding to the UE 10 from the HSS 60 and delivers the IP address to the UE 10. [

The UE 10 may request predetermined protocol information related to an external protocol and an application using a Protocol Configuration Option (PCO) parameter in a process of requesting a PDN connection when initially accessing an LTE network. Here, the protocol information may include a DNS server address.

The details of the above-mentioned PCO will be described in detail in 3GPP TS 24.008.

FIG. 4 is a diagram for explaining an IP address assignment procedure to help understand the present invention. More specifically, FIG. 4 is a diagram for explaining a static IP address assignment procedure.

Referring to FIG. 4, when the UE 10 is powered on, the UE 10 transmits an attach request, that is, a PDN Connectivity Request message to the MME 50 (S401). At this time, the PDN connection request message may include information such as International Mobile Station Identity (IMSI), PDN type = IPv4, and PCO = DNS Server IPv4 Address Request. Here, IMSI is unique identification information for identifying a subscriber in the LTE network.

The MME 50 transmits a Location Update Request message including the IMSI to the HSS 60 (S403)

The HSS 60 inquires of the subscriber profile corresponding to the IMSI from the internal database and transmits to the MME 50 a Location Update Answer Message including a fixed IP address allocated in advance to the corresponding subscriber (S405) .

The MME 50 includes a session creation request including a fixed IP address received from the HSS 60 and an International Mobile Subscriber Identity (IMSI) received from the UE 10, PDN type = IPv4, PCO = DNS Server IPv4 Address Request, (Create Session Request Message) to the S-GW 30 (S407).

Subsequently, the S-GW 30 transmits the received session creation request message to the P-GW 40 (S409).

Thereafter, in response to the request message in steps 409 and 407, the P-GW 40 and the S-GW 30 send a Create Session Response message to the MME 50 send. Here, the session creation response message may include the fixed IP address in the PDN address field and the DNS server IP address requested by the user in the PCO field.

The MME 50 transmits an Activate Default EPS Bearer Context Request message including a static IP address and a DNS IP address, wherein the DNS IP address may include a primary DNS IP address and a secondary DNS IP address. To the UE 10 (S415). Here, the default EPS bearer activation request message, which is one of the EPS session management messages (hereinafter referred to as "ESM (EPS Session Management) messages"), is an EPS mobility management message. May be included in the "Attach Accept Message" called "EMM (EPS Mobility Management) message".

Thereafter, a static IP address and a DNS IP address are stored in the internal memory of the UE 10 (S417), and a default EPS bearer is set between the UE 10 and the P-SW 40 (S419). At this time, the UE 10 can access the PDN 110 through the set default EPS bearer and transmit / receive user IP packets.

The above procedure is also referred to as an LTE attach process and is defined in the 3GPP TS 24.301 standard.

Next, the SIP registration process of the terminal will be described with reference to FIG.

5 is a flowchart illustrating an example of a process in which a terminal performs SIP registration in a general LTE system.

5, the Attach request process (S510) and the Attach Accept process (S520) correspond to the processes from S401 to S415 of FIG. 4, so that overlapping descriptions will be omitted for simplicity of description.

When the attaching process is completed, the terminal transmits a SIP registration message to the network (S530). When the registration is successful, the terminal periodically performs the SIP registration again (S540).

However, when the terminal does not regularly perform the SIP registration operation periodically as described above, the IMS-based service such as VoLTE can not normally be provided.

Accordingly, in an embodiment of the present invention, when the SIP registration of the terminal is not normally performed, a specific message is transmitted to the terminal from the network, and when the terminal receives the message, And reset the SIP registration procedure so that the SIP registration procedure of the terminal is guaranteed to be performed.

According to an aspect of the present embodiment, when the HSS 60 recognizes that the HSS 60 does not register the SIP registration of the terminal, it can recognize the SIP registration procedure performance of the terminal for a certain period of time after the MME 50 requests to detach the terminal If not, it can be triggered. That is, when there is no SIP registration of the terminal until a predetermined time has elapsed after the HSS 60 requests the MME 50 to transmit the detached message, the HSS 60 transmits the specific message to the MME 50 Can be requested.

According to an embodiment of the present invention, the specific message may be a detach message in which an EMM (EPS Mobility Management) Cause field is set to a predetermined value. Here, the specific value may be " 111 (Protocol error, unspecified) ", but this is an example and is currently reserved in the network of the business entity. If the EMM cause value is defined between the network and the terminal Any value is irrelevant.

According to an aspect of the embodiment, when the terminal receives the specific message, the process of the terminal's kill & reset may be an IMS process (or a stack). In addition, such a kill & reset operation can be performed as a background process.

Hereinafter, an operation of a terminal according to an embodiment of the present invention will be described with reference to FIG.

FIG. 6 shows an example of an internal operation procedure of the UE for ensuring SIP re-registration according to an embodiment of the present invention.

Referring to FIG. 6, the terminal 620 may receive a detach message including a specific cause (e.g., 111) from the network 610 according to a periodic SIP registration failure.

Information (Detach (EMM cause = 111) indicating that the message is received is transmitted to the RIL (Radio Service) layer of the AP (application process) layer 623 through Inter-Process Communication (IPC) Interface Layer. Here, RIL functions as a layer in the operating system (OS) to provide an interface to a modem, and IPC can mean a method or a path for exchanging data between processes. Since the IPC can be variously set for each terminal, detailed description will be omitted.

On the other hand, the detach (EMM cause = 111) IPC transfer from the CP to the AP may be performed after the Attach procedure is completed, or immediately after the Detach message is received, but the intent may be transmitted after the Attach.

The RIL may send an intent to the IMS stack so that the IMS stack can be forced to initialize (i.e., kill & reset) according to the Detach (EMM cause = 111) IPC received from the CP 621. Here, an intent can be a kind of message object, which means a means by which a task can be requested from another application component. The intent of this embodiment may be an intent (i.e., broadcast intent) of the type broadcast in the IPC.

Based on the internal operation of the terminal, the SIP-related operations of the entire terminal will be described with reference to FIG.

7 is a flowchart illustrating an example of an operation procedure of a terminal according to an embodiment of the present invention.

Referring to FIG. 7, a terminal may perform an attach procedure when the power is turned on, when the airplane mode is canceled, when a detach message is received, and the SIP registration procedure is performed using the IP allocated thereto (S710).

The terminal may periodically perform SIP registration at predetermined intervals (S720).

If the periodic registration is successful, the registration to the IMS is maintained (S730). If the periodic registration fails, the HSS requests the MME to transmit a detach message. Therefore, the terminal receives the Detach message from the network (S740).

In this case, if the UE fails to register in the periodic registration for the first time, the HSS will request the MME to transmit a general detach message (re-attach required setting, etc.). However, The HSS requests the MME to transmit a Detach message set to EMM cause = "111 ".

Accordingly, the UE confirms the EMM Cause of the received Detach message (S750), and if not set to "111 " (S760), the UE can perform the default Attach and Registration procedure.

Conversely, when the EMM Cause is set to "111 ", IPC delivery for initializing the IMS stack to the AP after attach at the CP terminal of the terminal can be performed (S770).

The RIL sends a detent (EMM cause = 111) IPC received from the CP to the IMS stack, thereby allowing the IMS stack to be killed and reset (S780).

In summary, SIP registration operation of the terminal is necessary for normal service of VoLTE. If periodic SIP registration operation is impossible due to malfunction of terminal, etc., the user does not need to manually turn off the power, It is possible.

Terminal and base station structure

Hereinafter, an apparatus structure applicable to the embodiments of the present invention will be described.

The terminal may operate as a transmitter in an uplink and as a receiver in a downlink. In addition, the base station can operate as a receiver in an uplink and operate as a transmitter in a downlink. That is, the terminal and the base station may include a transmitter and a receiver for transmission of information or data.

The transmitter and receiver may comprise a processor, module, part and / or means, etc., for performing embodiments of the present invention. In particular, the transmitter and receiver may include a module (means) for encrypting the message, a module for interpreting the encrypted message, an antenna for transmitting and receiving a radio signal, and the like. An example of such a transmitting end and a receiving end will be described with reference to FIG.

8 is a block diagram showing an example of a structure of a transmitting end and a receiving end according to another embodiment of the present invention.

Referring to FIG. 8, the left side shows the structure of the transmitting end, and the right side shows the structure of the receiving end. Each of the transmitting end and the receiving end includes antennas 805 and 810, processors 820 and 830, transmission modules (Tx modules 840 and 850), receiving modules (Rx modules 860 and 870), and memories 880 and 890 . Each component can perform a function corresponding to each other. Each component will be described in more detail below.

The antennas 805 and 810 transmit signals generated by the transmission modules 840 and 850 to the outside or receive radio signals from the outside and transmit the signals to the reception modules 860 and 870. If a multi-antenna (MIMO) function is supported, more than two may be provided.

The antenna, the transmitting module and the receiving module can together form a wireless communication (RF) module.

Processors 820 and 830 typically control the overall operation of the receiving and transmitting ends. For example, a controller function, a service characteristic, and a MAC (Medium Access Control) frame variable control function, a handover function, an authentication and encryption function, and the like for performing the above- .

In particular, the processor of the terminal can control the overall procedure of the Attach / Detach process and the SIP registration process, provide the interface to the modem constituting the receiving module through the RIL, and transmit the intent corresponding to the IPC transmitted to the RIL to the specific stack As shown in FIG.

In addition, the processor of the terminal, the base station, the MME, and the HSS can perform the overall control operation of the operation procedure described in the above embodiments.

The transmission modules 840 and 850 may perform predetermined coding and modulation on the data to be transmitted to the outside after being scheduled from the processors 820 and 830 and may transmit the data to the antenna 810.

The receiving modules 860 and 870 decode and demodulate the radio signals received from the outside through the antennas 805 and 810 and restore them in the form of original data to the processors 820 and 830 .

The memories 880 and 890 may store programs for processing and controlling the processors 820 and 830, and may perform functions for temporarily storing input / output data. The memories 880 and 890 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory A static random access memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM) Magnetic disk, magnetic disk, magnetic disk, or optical disk.

The base station includes a controller function for performing the above-described embodiments of the present invention, orthogonal frequency division multiple access (OFDMA) packet scheduling, time division duplex (TDD) packet scheduling and channel multiplexing , A high speed traffic real time control function, a handover function, an authentication and encryption function, a packet modulation / demodulation function for data transmission, a high speed packet channel coding function and a real time modem control function are performed through at least one of the above- And may further include additional means, modules, or portions for performing these functions.

The present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention. In addition, claims that do not have an explicit citation in the claims may be combined to form an embodiment or be included in a new claim by amendment after the filing.

Claims (16)

A method of SIP registration of a terminal in a wireless communication system,
Receiving a message indicating a network re-attach from the network;
Performing an attach to the network in response to the message; And
Performing a SIP registration procedure,
Performing the SIP registration procedure when the first field of the message is set to a specific value,
And initializing a specific stack involved in the SIP registration procedure,
The specific stack may include:
A method of SIP registration, comprising an IP Multimedia Subsystem (IMS) stack of an application process layer. The method according to claim 1,
Performing the SIP registration procedure when the first field of the message is set to a specific value,
Transmitting IPC (Inter-Process Communication) according to the reception of the first field set to a specific value to the modem interface providing layer (RIL) of the application process layer at the modem layer of the AT; And
Further comprising the step of the RIL delivering an intent corresponding to the delivered IPC to the specific stack. 3. The method of claim 2,
Wherein initializing the particular stack comprises:
Wherein the SIP registration method is performed by the intent. The method according to claim 1,
The message comprises:
And a detach message delivered from an MME (Mobility Management Entity). 5. The method of claim 4,
The first field includes an "EMM cause" field,
And the specific value includes "111 ". delete A method for supporting Session Initiation Protocol Registration (SIP) of a terminal in a wireless communication system,
When a periodic SIP registration of the terminal is not performed, a first network entity managing the registration information of the terminal requests a first message transmission to a second network entity that manages mobility;
The second network entity transmitting the first message to the terminal according to the first request;
When the SIP registration of the terminal is not performed for a predetermined time after the first request, the first network entity requests a second message transmission to the second network entity; And
And forwarding the second message such that the second network entity initiates a specific stack associated with the SIP registration procedure of the terminal according to the second request,
The specific stack may include:
And an IMS (IP Multimedia Subsystem) stack of a terminal application process layer. 8. The method of claim 7,
Wherein the first network entity comprises a Home Subscriber Server (HSS) and the second network entity comprises a Mobility Management Entity (MME). 8. The method of claim 7,
Wherein the first message includes a detach message,
Wherein the second message comprises a detach message in which a first field is set to a specific value. 10. The method of claim 9,
The first field includes an "EMM cause" field,
And the specific value includes "111 ". delete A computer-readable recording medium on which a program for executing the SIP registration method according to any one of claims 1 to 5 is recorded. A terminal apparatus for performing a SIP registration (Session Initiation Protocol Registration) procedure,
A modem layer that controls the modem that exchanges signals with the network; And
An application protocol layer having a first stack participating in the SIP registration procedure and a modem interface providing layer (RIL) providing an interface to the modem,
Wherein the modem layer, when receiving a message from the network, the first field being set to a specific value,
(RIL) through Inter-Process Communication (IPC) that the first field is set and received as a specific value,
Wherein the modem interface providing layer comprises:
And delivers an intent corresponding to the delivered IPC to the first stack so that the first stack is initialized. 14. The method of claim 13,
The message comprises:
And a detach message delivered from an MME (Mobility Management Entity). 15. The method of claim 14,
The first field includes an "EMM cause" field,
And the specific value includes "111 ". 14. The method of claim 13,
Wherein the first stack comprises:
And an IMS (IP Multimedia Subsystem) stack.

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