KR20190056586A - Apparatus and method for packet processing - Google Patents

Abstract

The present invention relates to an apparatus for processing a packet for processing an error during voice and video communication in a mobile communication system and a method thereof. According to an embodiment of the present invention, the apparatus for processing a packet comprises the steps of: establishing a call connection between a first terminal and a second terminal included in the mobile communication system; checking a state of the first terminal when a packet is not received from the first terminal for a predetermined time or more; checking a connection state of a network used for the call connection when a packet is not received from the first terminal for a predetermined time or more; and controlling the first terminal to disconnect and reconnect to the mobile communication system.

Description

[0001] APPARATUS AND METHOD FOR PACKET PROCESSING [0002]

The present disclosure relates to an apparatus and a method for processing a packet for processing an error during voice and video communication in a mobile communication system.

Recently, due to the rapid development of communication, computer network and semiconductor technology, not only various services using wireless communication networks have been provided, but the demand of users has been increasing day by day, and the global wireless Internet service market has been exploding Trend. Accordingly, a service provided by a mobile communication system using a wireless communication network is being developed not only as a voice service, but also as a multimedia communication service for transmitting various data. Recently, with the increase of smart phones and the demand for data traffic, mobile operators are investing equipment and technology considering the system part and the influence to accommodate the increased data traffic in various ways.

Long Term Evolution (LTE) is a network for realizing requirements of high data rate, low-latency, and packet optimized radio access for an access network , And is designed to accommodate high-speed rich media while ensuring backward compatibility with existing 3GPP / non-3GPP access networks. LTE is an All-IP-based network that excludes existing circuit-switched based communications and enhances quality of service (OoS) management functions to provide real-time services (eg, voice communications, video communications) The quality of service (QoS) is differentiated for real-time services (e.g., web browsing, Store and Forward data transmission), thereby improving the efficiency of network resources. We also extended the bandwidth for wireless communications by introducing smart antenna technology (MIMO: multiple input multiple output).

In an EPC (Evolved Packet Core) network, which is an LTE core network, an eNodeB, an MME, a MME, a Serving Gateway, and an S-GW < -> P-GW (Packet Data Network-Gateway) to perform call processing for voice and data processing. In the EPC network, a control message such as call setup and release is recognized as an IP packet and transmitted to the P-GW or received from the P-GW and transmitted to the user equipment (UE).

After the VoLTE service connection is normally completed, the voice and video message is included in the RTP (Real Time Protocol) packet to be transmitted and received to the calling and called terminal. VoLTE service If an RTP packet can not be transmitted for a certain time (for example, 10 seconds) due to some abnormal cause in the LTE network during voice and video communication (NO RTP), the eNB of the LTE network or the IP Multimedia Subsystem The included terminal uses the SIP (Session Initiation Protocol) message to terminate the VoLTE service. At this time, the S-GW / P-GW of the LTE network does not perform any action until the VoLTE service is terminated by NO RTP.

The present disclosure provides a packet processing apparatus and method for handling errors during voice and video communication in a mobile communication system.

A packet processing apparatus in a mobile communication system according to an embodiment of the present disclosure performs a call connection between a first terminal and a second terminal included in a mobile communication system and receives a packet from a first terminal for a first predetermined time or longer The first terminal checks the status of the first terminal and checks the connection status of the network used for the call connection. If the packet is not received from the first terminal for a second predetermined time or longer, the connection to the mobile communication system of the first terminal is canceled And to control reconnection; And a storage unit for storing information on a status check of the first terminal and a connection state check result of a network used for the call connection.

In addition, in the packet processing apparatus according to the embodiment of the present disclosure, the processor transmits a DDN (Downlink Data Notification) message to the first terminal and checks the status of the first terminal by confirming whether the response is received.

Further, in the packet processing device according to the embodiment of the present disclosure, the processor transmits a sample signal to the first terminal using ICMP (Internet Control Message Protocol), confirms whether or not a response to the sample signal is received, Perform the connection check of the used network.

In addition, in the packet processing apparatus according to the embodiment of the present disclosure, the processor checks the state of the first terminal and information on the result of checking the connection state of the network used for the call connection, .

In addition, in the packet processing apparatus according to the embodiment of the present disclosure, the processor may check the state of the first terminal and information on the result of checking the connection state of the network used for the call connection by using a SIP (Session Initiation Protocol) 2 terminal.

According to another aspect of the present invention, there is provided a packet processing method in a mobile communication system, including: performing a call connection between a first terminal and a second terminal included in a mobile communication system; Performing a status check of the first terminal when a packet is not received from the first terminal for a first predetermined time period; Performing a connection state check of a network used for a call connection when a packet is not received from the first terminal for a predetermined time or longer; And controlling the first terminal to disconnect and reconnect to the mobile communication system when a packet is not received from the first terminal for a second predetermined time or more.

In addition, in the packet processing method according to the embodiment of the present disclosure, performing the status check of the first terminal may include: transmitting a DDN (Downlink Data Notification) message to the first terminal; And checking the status of the first terminal by confirming whether or not to receive a response to the DDN message.

In addition, in the packet processing method according to the embodiment of the present disclosure, performing the connection state check of the network used for the call connection includes transmitting a sample signal to the first terminal using ICMP (Internet Control Message Protocol) ; And confirming whether or not to receive a response to the sample signal, thereby performing a connection state check of the network used for the call connection.

In addition, in the packet processing method according to the embodiment of the present disclosure, information on a status check of a first terminal and a connection state check result of a network used for a call connection is transmitted to an administrator terminal of the mobile communication system using a status message The method comprising the steps of:

In addition, in the packet processing method according to the embodiment of the present disclosure, information on the result of checking the state of the first terminal and the result of checking the connection state of the network used for the call connection is transmitted to the second terminal And controlling the transmission to be performed.

According to the embodiments of the present disclosure, it is possible to prevent resource waste by performing a check on the cause of an abnormal situation until the Voice over Long Term Evolution (VoLTE) service is terminated due to an abnormal situation, . &Lt; / RTI &gt;

1 is a diagram illustrating an exemplary configuration of a mobile communication system according to an embodiment of the present disclosure.
FIG. 2 is a diagram illustrating an exemplary configuration of an EPC network according to an embodiment of the present disclosure.
3 is an exemplary diagram showing a configuration of a packet processing apparatus according to an embodiment of the present disclosure;
4 is a signal flow diagram illustrating the procedure of a packet processing method according to an embodiment of the present disclosure;

The embodiments of the present disclosure are illustrated for the purpose of describing the technical idea of the present disclosure. The scope of the claims according to the present disclosure is not limited to the embodiments described below or to the detailed description of these embodiments.

All technical and scientific terms used in the present disclosure have the meaning commonly understood by one of ordinary skill in the art to which this disclosure belongs unless otherwise defined. All terms used in the disclosure are selected for the purpose of more clearly illustrating the disclosure and are not chosen to limit the scope of the rights under the present disclosure.

As used in this disclosure, the terms "comprising", "having", "having", "having", and the like are to be construed as including the possibility of including other embodiments, unless the context requires otherwise Should be understood as open-ended terms.

The expressions of the singular forms described in this disclosure may include plural meanings unless the context clearly dictates otherwise, and the same applies to the singular expressions set forth in the claims.

As used in this disclosure, expressions such as " first ", " second ", and the like are used to distinguish a plurality of components from each other and do not limit the order or importance of the components.

The term " part " as used in this disclosure refers to hardware components such as software or an FPGA (field-programmable gate array), ASIC (application specific integrated circuit). However, " part " is not limited to hardware and software. &Quot; Part " may be configured to reside on an addressable storage medium, and may be configured to play back one or more processors. Thus, by way of example, and not limitation, " part (s) " may include but are not limited to elements such as software components, object oriented software components, class components and task components, Microcode, circuitry, data, databases, data structures, tables, arrays, and variables of program code. The functions provided within the component and the " part " may be combined into a smaller number of components and " parts " or further separated into additional components and " parts ".

As used in this disclosure, the expression " based on " is used to describe one or more factors affecting an action or an action of a decision, judgment, as described in the phrase or sentence in which the expression is contained, It does not exclude any additional factors that affect the decision, act of judgment or action.

In the present disclosure, it is to be understood that when an element is referred to as being "connected" or "connected" to another element, it is to be understood that any element may be directly connected to or connected to another element, Or &lt; / RTI &gt; can be connected to each other.

Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. In the accompanying drawings, the same or corresponding components are denoted by the same reference numerals. In the following description of the embodiments, description of the same or corresponding components may be omitted. However, even if the description of the components is omitted, such components are not intended to be included in any embodiment.

In one embodiment, the mobile communication network includes a wireless network such as a Global System for Mobile communication (GSM), a 2G wireless communication network such as CDMA, an LTE network, a wireless Internet such as WiFi, a Wireless Broadband Internet (WiBro), and a World Interoperability for Microwave Access (E.g., 3G mobile communication network such as WCDMA or CDMA2000), 3.5G mobile communication network such as HSDPA (High Speed Downlink Packet Access) or HSUPA (High Speed Uplink Packet Access) Or 4G mobile communication network currently in service, and any other mobile communication network including a macro base station (macro eNodeB), a micro base station (Pico eNodeB, Home eNodeB) and a user terminal (UE: User Equipment) But is not limited thereto. Hereinafter, an E-UTRAN (Evolved Universal Terrestrial Radio Access Network) as a radio access network of LTE will be mainly described.

As shown in FIG. 1, the mobile communication network may include one or more network cells, and may include a Heterogeneous Network (HET) environment in which different kinds of network cells may be mixed in a mobile communication network. The mobile communication network includes miniature base stations (Pico eNodeB, Home-eNodeB, relay, etc.) 11 to 15, 21 to 23, and 23, which manage small-sized network cells (e.g., 'small cells' such as picocells, femtocells, (Macro eNodeBs) 10, 20 and 30 for managing a wide range of cells (for example, 'macro cells' (MSS) 60, an S-GW (Serving Gateway) 80, a P-GW (Packet Data Network) gateway 90 and an HSS (Home Subscriber Server) (100). Each component shown in Fig. 1 is illustrative, and the components of the mobile communication network in which the present disclosure can be implemented are not limited to those shown in the drawings.

For example, the macro base stations 10, 20 and 30 can be used in an LTE network, a WiFi network, a WiBro network, a WiMax network, a WCDMA network, a CDMA network, a UMTS network, But is not limited to, the characteristics of the macro cell base station that manages the base station.

The micro base stations 11 to 15 and 21 to 23 and 31 to 33 can be used in an LTE network, a WiFi network, a WiBro network, a WiMax network, a WCDMA network, a CDMA network, a UMTS network, but is not limited to, the features of a pico base station, an indoor base station or a femto base station, or a relay that manages a cell having a radius of about m to several tens of meters.

The micro base stations 11 to 15 and 21 to 23 and 31 to 33 and the macro base stations 10 and 20 and 30 independently control the SON server 50, the MME 60, the S-GW 80, (90), HSS (100), and the like.

The user terminal 40 may be a mobile Internet network such as a GSM network, a 2G wireless communication network such as a CDMA network, a wireless Internet network such as an LTE network and a WiFi network, a WiBro network, and a WiMax network, A terminal, a feature of an Internet of Things (IOT) terminal that requires low power consumption and requires a small amount of data and has a small range of movement.

The management server (O & M server) 70, which is a network management apparatus of the micro-base station, is responsible for configuration information and management of the micro base stations 11 to 15, 21 to 23 and 31 to 33 and the macro base stations 10, 20 and 30 . The management server 70 can perform all the functions of the SON server 50, the MME 60, and the HSS 100. [ SON server 50 may include any server that performs macro / micro base station installation and optimization and functions to provide basic parameters or data necessary for each base station. The MME 60 may include any entity used to manage the mobility of the user terminal 40 and the like. In addition, the MME 60 performs a function of a base station controller (BSC), and performs resource allocation, call control, handover control, and handover control on base stations (pico eNodeB, Home- eNodeB, macro eNodeB, Voice and packet processing control, and the like. The HSS 100 is a kind of database for service / authentication of the subscriber.

In one embodiment, one management server 70 can perform all the functions of the SON server 50, the MME 60, and the HSS 100, and the SON server 50, the MME 60, The base station 100 may manage one or more macro base stations 10, 20 and 30 and one or more micro base stations 11 to 15, 21 to 23 and 31 to 33.

Although it is assumed that a macro cell, a pico cell, and a femtocell are mixed in the mobile communication network, the network cell may be composed of a macro cell, a pico cell, and a macro cell.

Specifically, the micro-base stations 11 to 15, 21 to 23, and 31 to 33 can broadcast SIB (System Information Block), which is system information, to the femtocell area managed by itself. And a CSG indicator (Closed Subscriber Group indicator) indicating whether or not it is restricted. SIB is a message that a base station (HeNB, macro eNB) broadcasts information about its own cell to all the user terminals 40. The SIB includes a CGI (Cell Global Identity) (a unique cell identifier in the network), a CSG indication A factor indicating the base station), a CSG ID (an ID for a specific subscriber group), and the like.

When the mobile communication network is assumed to be an LTE network, the LTE network is interworked with an inter-RAT network (WiFi network, WiBro network, WiMax network, WCDMA network, CDMA network, UMTS network, GSM network, etc.). (LTE network, WiFi network, WiMax network, WCDMA network, CDMA network, UMTS network, GSM network, etc.) when one of the inter-RAT networks (e.g., WiBro network) is the mobile communication network. (WiFi network, WiMax network, WCDMA network, CDMA network, UMTS network, GSM network, etc.) are shown apart from one another in the drawing, it is assumed that it is overlaid.

If the micro base stations 11 to 15, 21 to 23 and 31 to 33 and / or the macro base stations 10, 20 and 30 are collectively referred to as a 'base station device', the LTE base station device (eNB in FIG. The Evolved UMTS Terrestrial Radio Access Network (E-UTRAN), which is composed of a plurality of base stations 25-1 to 25-n, has an IP-based flat structure and processes data traffic between the user terminal 40 and the core network. The signal control between them is performed by the MME 60. The MME 60 takes charge of signal control between the eNB 25-n and the S-GW 80 and determines where to route the incoming data from the user terminal 40. [ The S-GW 80 performs an anchor function between the eNBs 25-n and the user terminal between the 3GPP network and the E-UTRAN and transmits the anchor function to the IP network 110 via the P- . The MME 60 / S-GW 80 as a core network equipment manages a plurality of eNBs 25-n, and each eNB 25-n is composed of a plurality of cells. (S1-MME and S1-U in FIG. 2) are used between the eNB 25-n and the MME 60 / S-GW 80, An X2 interface (not shown) is used for over and SON functions.

The setup of the network interface is performed by setting the S1 interface connecting with the MME 60 at the center of the system and the X2 interface which is a network line for direct communication with the eNBs 25-n of other cells existing on the present system. The S1 interface exchanges operation and management (OAM) information to support the movement of the user terminal 40 by exchanging signals with the MME 60. [ Also, the X2 interface exchanges signals for fast handover, load indicator information, and information for self-optimization among the eNBs 25-n.

FIG. 2 is a diagram illustrating an exemplary configuration of an EPC network according to an embodiment of the present disclosure.

The E-UTRAN 25 is an LTE radio access network composed of eNBs 25-1, ..., 25-n, ..., and is based on IP and is connected between the UE 40 and a wireless communication core network And transmits data and control information. In addition, when a terminal using the LTE system moves to an existing 2G / 3G mobile communication network using a voice service, a paging request for a circuit switch (Fallback) to receive voice service, an SMS message to the UE 40 ) And a direct connection to a target cell capable of a CS service.

2, " LTE-Uu " represents an air interface between the E-UTRAN 25 and the UE 40, " S1-MME " represents an interface between the MME 60 and the E-UTRAN 25, "S1-U" represents an interface between the S-GW 80 and the E-UTRAN 25, "S11" represents an interface between the S-GW 80 and the MME 60, "S5 / SGI "represents the interface between the P-GW 90 and the S-GW 90, and" SGi "represents the interface between the IP network 110 and the P-GW 90. And " S6a " may represent the interface between the HSS 100 and the MME 60.

The UE 40 and the eNBs 25-1 to 25-n of the E-UTRAN 25 communicate via the RRC (Radio Resource Control) protocol and the eNB 25- A broadcasting message to a cell area to be controlled by the RRC message is defined as an RRC message. The RRC message may include control messages from the Non-Access Stratum (NAS) protocol, which control messages are transparently transferred to the UE 40 or the core network without being read in the E-UTRAN 25 .

The eNB 25-n is an end point for the radio signal of the E-UTRAN 25 and the control signal is interlocked with the MME 60 via the S1-MME interface and the data traffic is transmitted to the S- (80). The S-GW 80 performs a buffering function for the anchor and downlink traffic for mobility in the E-UTRAN 25. [ The P-GW 90 is a connection point of the external IP network 110, performs IP allocation and billing for a mobile subscriber, and traffic control functions for user data.

The IP network 110 provides an IMS (IP Multimedia Subsystem) service for the UE 40 in the EPC network, a Policy & Charging Rule Function (PCRF), an IMS nodes (for example, a Proxy Call Session Control Function , An Interrogating Call Session Control Function (I-CSCF), a Serving Call Session Control Function (S-CSCF), and an Application Function Function (AF)).

UE 40 sends and receives a call control message for multimedia services using IMS nodes and the Gm interface through an EPC bearer (provided by E-UTRAN / S-GW / P-GW).

The E-UTRAN 25 provides a radio communication function to the UE 40 and performs a function of managing radio resources for the radio communication function.

The MME 60 may receive authentication information for authenticating the UE 40 from the HSS 100 and perform authentication of the UE 40. [ The MME 60 also manages the mobility of the UE 40 and the eNB 25-n at the upper level of the eNB 25-n and controls the setting and release of an Evolved Packet System (EPS) session and a bearer The same call control function can be performed. Mobility and session control with the UE 40 is handled by the NAS protocol at the NAS (Non-Access Stratum) layer located in the control plane of the UE 40 and the MME 60, And the MME 60 communicate with each other through the NAS message. The NAS function is largely divided into EMM (EPS Mobility Management) and ESM (EPS Session Management) functions. In addition, the MME 60 may be directly connected to the IP network 110 through the S-GW 80 and the P-GW 90. The call processing control signal of the eNB 25-n is transmitted to the S-GW 80 via the MME 60 and is transmitted to the P-GW 90 in response to the call processing control signal, Lt; / RTI &gt; The EMM is a sublayer located in the NAS layer, and the EMM procedure is performed, so that the UE 40 has seven EMM states and the MME 60 has four EMM states. In order for the UE 40 and the MME 60 to send and receive NAS messages, a signaling connection must be created between the UE 40 and the MME 60 so that the NAS message can be transmitted. This is called an ECM (EPS Connection Management) connection . The ECM connection is a logical connection and consists essentially of an RRC connection established between the UE 40 and the eNB 25-n and an S1 signaling connection established between the eNB 25-n and the MME 60. That is, the ECM connection is turned on / off means that the RRC connection and the S1 signaling connection are both turned on / off. When an ECM connection is established, an RRC connection is seen from the UE 40, and an S1 signaling connection is established from the MME 60. [ The ECM connection has ECM-Connected and ECM-Idle status depending on whether the NAS signaling connection, ECM connection, or not. According to the EMM procedure, the ECM-Connected state and the ECM-Idle state are frequently moved. This change process is referred to as a state transition.

The S-GW 80 acts as a gateway between the 3GPP network and the E-UTRAN 25 and performs the handover between the eNBs 25-n and the UE 40 between the 3GPP network and the 3GPP network (inter-3GPP) And can perform a mobility anchor function for providing the service. The S-GW 80 can transmit to the P-GW 90 a job necessary for call processing according to the control signal of the eNB 25-n.

The P-GW 90 may allocate an IP address to the UE 40 and apply different QoS policies to the UE 40. [ In addition, the P-GW 90 acts as a gateway to a PDN (Packet Data Network), allowing the UE 40 to access a data network such as the Internet or the Internet to receive services.

Although the S-GW 80 and the P-GW 90 are illustrated as being separated and communicating at the S5 / S8 interface as an embodiment, the S-GW 80 and the P- single gateway).

The HSS 100 may manage authentication information for authenticating the UE 40, location information of the UE 40, and the profile of the UE 40. [ The profile of the UE 40 may include QoS rating information (e.g., priority, maximum available bandwidth, etc.) for each service item to which each UE 40 subscribes. In one embodiment, the authentication information for authenticating the UE 40 and the profile of the UE 40 may be transferred from the HSS 100 to the MME 60 when the UE 40 connects to the network.

The PCRF (not shown) manages policies and rules for charging and allows the P-GW 90 and the S-GW 80 to provide appropriate QoS for the UE 40 and use Allows you to perform the billing function for the bearer.

The IMS node (not shown) is made up of nodes such as P-CSCF, I-CSCF, S-CSCF, and AF in detail and the UE 40 provides multimedia services such as VoIP give.

3 is an exemplary diagram showing a configuration of a packet processing apparatus according to an embodiment of the present disclosure;

Referring to FIG. 3, the packet processing apparatus 300 may include a processor 310, a storage unit 320, a transmission / reception unit 330, and a system bus 340. According to one embodiment, the processor 310, the storage unit 320, and the transmission / reception unit 330 may be connected to each other to be communicable through the system bus 340. The packet processing apparatus 300 may be included in the S-GW 80 or the P-GW 90 or may be configured separately from the S-GW 80 or the P-GW 90.

The processor 310 may perform a call connection between the first terminal and the second terminal included in the mobile communication system. According to one embodiment, the first terminal may represent the user terminal 40 included in the mobile communication network, and the second terminal may include any terminal connected through the IP network 110. [ The call between the first terminal 40 and the second terminal may include voice and video call by Voice over Long Term Evolution (VoLTE) service, but is not limited thereto.

In addition, the processor 310 may perform a status check of the first terminal 40 when a packet is not received from the first terminal 40 for a first predetermined time (for example, five seconds). According to one embodiment, the processor 310 transmits a downlink data notification (DDN) message to the MME 60 to transmit the paging signal to the first terminal 40 via the eNB 25-1 . The processor 310 determines whether or not a response to the paging signal is received from the first terminal 40. If the response is received, the processor 310 determines that the first terminal 40 is in a normal state, It is possible to perform a status check of the first terminal 40 that determines that the terminal 40 is in an abnormal state. However, the method of checking the status of the first terminal 40 is not limited thereto.

In addition, the processor 310 may perform a connection state check of a network used for a call connection between the first terminal 40 and the second terminal. According to one embodiment, the processor 310 transmits a sample signal to the first terminal 40 using ICMP (Internet Control Message Protocol) or ICMPv6, confirms whether or not to receive a response to the sample signal, It is determined that the network connection status is normal. If the response is not received, the connection status of the network used for the call connection can be checked to determine that the network connection status is abnormal. A ping test may be used to transmit and receive the sample signal between the processor 310 and the first terminal 40, but is not limited thereto. Also, the method for performing the connection state check of the network used for the call connection between the first terminal 40 and the second terminal is not limited thereto.

In addition, the processor 310 transmits information on the result of checking the state of the first terminal 40 and the result of checking the connection state of the network used for the call connection between the first terminal 40 and the second terminal, And transmits information on the result of checking the state of the first terminal 40 and the result of checking the connection state of the network used for the call connection between the first terminal 40 and the second terminal to the SIP Session Initial Protocol) message to the second terminal. According to one embodiment, the processor 310 transmits information on the status of the first terminal 40 and the result of the connection state check of the network used for the call connection between the first terminal 40 and the second terminal, (Man and Machine Interface) of the second terminal and the manager terminal of the second terminal, but the present invention is not limited thereto.

In addition, when the packet is not received for a second predetermined time (for example, 10 seconds) from the first terminal 40, the processor 310 releases the connection to the mobile communication system and reconnects .

The storage unit 320 may store information on a status check of the first terminal 40 and a connection state check result of a network used for the call connection. According to one embodiment, the storage unit 320 may include a read only memory (ROM), a random access memory (RAM), a compact disc (CD) -ROM, a magnetic tape, a floppy disc, But is not limited to, an optical data storage device or a carrier wave (for example, transmission over the Internet).

The transmitting and receiving unit 330 can transmit and receive signals for performing the packet processing method. According to one embodiment, the transceiver 330 can receive an RTP packet transmitted and received through a VoLTE call connection between the first terminal 40 and the second terminal in real time, A signal for checking the connection state of the network used for the call connection between the first terminal 40 and the second terminal can be transmitted. The transmission and reception unit 330 transmits information about the status of the first terminal 40 and the result of checking the connection state of the network used for the call connection between the first terminal 40 and the second terminal, And the second terminal.

4 is a signal flow diagram illustrating the procedure of a packet processing method according to an embodiment of the present disclosure; Although process steps, method steps, algorithms, and the like have been described in this flowchart in a sequential order, such processes, methods, and algorithms may be configured to operate in any suitable order. In other words, the steps of the processes, methods and algorithms described in the various embodiments of the present disclosure need not be performed in the order described in this disclosure. Also, although some of the steps are described as being performed asynchronously, some of these steps may be performed concurrently in other embodiments. Also, an illustration of a process by way of illustration in the drawings is not intended to imply that the illustrated process excludes other variations and modifications thereto, and that any of the illustrated processes or steps thereof may be used in various embodiments of the present disclosure Does not imply that it is necessary for more than one, and does not mean that the illustrated process is preferred.

As shown in Fig. 4, in step S410, a call connection is established between the first terminal 40 and the second terminal. 1 to 3, the processor 310 of the packet processing apparatus 300 may include a first terminal 40 and a second terminal 40 which are included in the IP network 110 using SIP (Session Initiation Protocol) And perform voice over long term evolution (VoLTE) call connection between the second terminals.

In step S420, a transmission / reception state of an RTP (Real Time Protocol) packet processing a voice and video message after VoLTE call connection can be confirmed in real time. For example, referring to FIG. 1 to FIG. 3, the processor 310 can check the transmission / reception state of an RTP packet between the first terminal 40 and the second terminal in real time through the transmission / reception unit 330.

In step S430, a state in which the RTP packet is not normally transmitted / received during the first predetermined time is detected through the VoLTE call connection. For example, referring to FIG. 1 to FIG. 3, the processor 310 determines whether an RTP packet is normal for a first predetermined time (for example, 5 seconds) through a call connection between the first terminal 40 and the second terminal It is possible to detect a state in which transmission and reception are not performed.

In step S440, a status check of the first terminal may be performed. For example, referring to FIG. 1 to FIG. 3, the processor 310 determines whether an RTP packet is normally transmitted or received for a predetermined time (for example, five seconds) through a call connection between the first terminal 40 and the second terminal The status of the first terminal 40 can be checked. According to one embodiment, the processor 310 transmits a downlink data notification (DDN) message to the MME 60 to transmit the paging signal to the first terminal 40 via the eNB 25-1 . The processor 310 determines whether or not a response to the paging signal is received from the first terminal 40. If the response is received, the processor 310 determines that the first terminal 40 is in a normal state, It is possible to perform a status check of the first terminal 40 that determines that the terminal 40 is in an abnormal state.

In step S450, a connection state check of the network used for the call connection can be performed. For example, referring to FIG. 1 to FIG. 3, the processor 310 determines whether an RTP packet is normally transmitted or received for a predetermined time (for example, five seconds) through a call connection between the first terminal 40 and the second terminal The first terminal 40 may perform a status check of the network used for the call connection between the first terminal 40 and the second terminal. According to one embodiment, the processor 310 transmits a sample signal to the first terminal 40 using ICMP (Internet Control Message Protocol) or ICMPv6, confirms whether or not to receive a response to the sample signal, It is determined that the network connection status is normal. If the response is not received, the connection status of the network used for the call connection can be checked to determine that the network connection status is abnormal.

In step S460, information on the status of the first terminal and the result of checking the connection state of the network used for the call connection can be transmitted to the administrator terminal of the mobile communication system in real time. For example, referring to FIG. 1 to FIG. 3, the processor 310 checks the status of the first terminal 40 and the connection state check result of the network used for the call connection between the first terminal 40 and the second terminal Can be controlled to be transmitted to the administrator terminal of the mobile communication system using the status message. According to one embodiment, the processor 310 transmits information on the status of the first terminal 40 and the result of the connection state check of the network used for the call connection between the first terminal 40 and the second terminal, As a status message on the MMI (Man and Machine Interface) screen of the manager terminal.

In step S470, information on a status check of the first terminal and a connection state check result of the network used for the call connection can be transmitted to the second terminal in real time. For example, referring to FIG. 1 to FIG. 3, the processor 310 checks the status of the first terminal 40 and the connection state check result of the network used for the call connection between the first terminal 40 and the second terminal Can be controlled to be transmitted to the second terminal using a SIP (Session Initiation Protocol) message. According to one embodiment, the processor 310 checks the status of the first terminal 40 and the call connection between the first terminal 40 and the second terminal in the Reason field of the SIP BYE message, It is possible to control the second terminal to transmit information on the result of checking the connection status of the network.

BYE sip: f41f2k0v@02geenitia6j.invalid; alias = 192.168.2.161 ~ 37644-6; transport = ws; ob SIP / 2.0
Route: < sip: 0.0 . 0.0: 8088; transport = ws; lr & gt ;
Via: SIP / 2.0 / WSS hvq6jev4ol59.invalid; branch = z9hG4bK3273006
Max-Forwards: 69
To: < sip: rusekr1@teligent.ru >; tag = 6j3spjcrbv
From: < sip: rusekr2@teligent.ru >; tag = 4k3b8a5d7u
Call-ID: b3okd3aj2mjrcr92dk2m
CSeq: 5018 BYE
Reason: SIP; cause = 200; text = " RTP Timeout / DDN and ICMP test OK"
Allow: ACK, CANCEL, BYE, OPTIONS, INVITE
Supported: outbound
User-Agent: JsSIP 0.4.0-devel
Content-Length: 0

Information on the result of checking the status of the first terminal 40 and the connection state of the network used for the call connection between the first terminal 40 and the second terminal is displayed on the MMI (Man and Machine Interface) Message.

In step S480, if a packet is not received from the first terminal for a second predetermined time or longer, the connection to the mobile communication system of the first terminal is released and a reconnection procedure can be performed. For example, referring to FIG. 1 to FIG. 3, when the first terminal 40 receives a packet from the first terminal 40 for a second predetermined time (for example, 10 seconds) It is possible to control the first terminal 40 to reconnect to the mobile communication system by controlling to release the connection to the mobile communication system.

Although the method has been described through particular embodiments, the method may also be implemented as computer readable code on a computer readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the computer-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like. In addition, the computer-readable recording medium may be distributed over network-connected computer systems so that computer readable codes can be stored and executed in a distributed manner. And, functional programs, codes, and code segments for implementing the above embodiments can be easily inferred by programmers in the technical field to which this disclosure belongs.

Although the present disclosure has been described in connection with some embodiments herein, it should be understood that various modifications and changes may be made thereto without departing from the spirit and scope of the present disclosure as will be apparent to those skilled in the art to which this disclosure belongs. something to do. It is also contemplated that such variations and modifications are within the scope of the claims appended hereto.

11 ~ 15, 21 ~ 23, 31 ~ 33: micro base stations 10, 20, 30: macro base station
40: User terminal 50: SON server
60: MME 70: management server
80: S-GW 90: P-GW
100: HSS 110: IP network
300: Packet Processing Unit 310: Processor
320: Storage unit 330: Transmitting /
340: System bus

Claims (10)

1. A packet processing apparatus in a mobile communication system,
The method of claim 1, further comprising: performing a call connection between a first terminal and a second terminal included in the mobile communication system, and when a packet is not received from the first terminal for a first predetermined time or longer, A processor for performing a connection state check of a network and controlling the first terminal to disconnect and reconnect to the mobile communication system when a packet is not received from the first terminal for a second predetermined time or more; And
And a storage unit for storing information on the status of the first terminal and the result of checking the connection status of the network used for the call connection,
Packet processing device. The method according to claim 1,
The processor comprising:
Transmitting a Downlink Data Notification (DDN) message to the first terminal, checking the status of the first terminal by checking whether a response is received,
Packet processing device. The method according to claim 1,
The processor comprising:
The method comprising: transmitting a sample signal to the first terminal using an ICMP (Internet Control Message Protocol), checking whether a response to the sample signal is received, and checking a connection state of the network used for the call connection;
Packet processing device. The method according to claim 1,
The processor comprising:
And controlling the status of the first terminal and the result of checking the connection status of the network used for the call connection to be transmitted to the administrator terminal of the mobile communication system using the status message,
Packet processing device. The method according to claim 1,
The processor comprising:
And controlling transmission of information on the status of the first terminal and the result of checking the connection state of the network used for the call connection to the second terminal using a Session Initiation Protocol (SIP) message,
Packet processing device. A packet processing method in a mobile communication system,
Performing a call connection between a first terminal and a second terminal included in the mobile communication system;
Performing a status check of the first terminal when a packet is not received from the first terminal for a first predetermined time period;
Performing a connection state check of a network used for the call connection when a packet is not received from the first terminal for a predetermined time or more; And
And controlling to disconnect and reconnect the first terminal to the mobile communication system when a packet is not received from the first terminal for a second predetermined time or longer.
Packet processing method. The method according to claim 6,
Wherein performing the status check of the first terminal comprises:
Transmitting a DDN (Downlink Data Notification) message to the first terminal; And
Checking the status of the first terminal by confirming whether or not to receive a response to the DDN message;
Packet processing method. The method according to claim 6,
Wherein performing the connection state check of the network used for the call connection comprises:
Transmitting a sample signal to the first terminal using ICMP (Internet Control Message Protocol); And
Checking whether a response to the sample signal is received, and checking a connection state of the network used for the call connection.
Packet processing method. The method according to claim 6,
Further comprising the step of controlling to transmit to the administrator terminal of the mobile communication system information on a result of checking the state of the first terminal and a result of checking a connection state of a network used for the call connection,
Packet processing method. The method according to claim 1,
Further comprising the step of controlling the second terminal to transmit information on a result of checking the state of the first terminal and a result of checking the connection state of the network used for the call connection to the second terminal using a SIP (Session Initiation Protocol) message.
Packet processing method.

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