KR102333326B1 - System for mission critical push-to-talk based on open cloud os and method of performing the same - Google Patents

Abstract

According to an embodiment of the present invention, an open cloud OS-based MCPTT system comprises: a combined wired/wireless terminal for transmitting and receiving data to and from an MCPTT server by being connected to the MCPTT server through any one of a wireless network and a wired network based on a cloud OS; an authentication server that performs network authentication through different authentication methods depending on whether a network type connected to the MCPTT server is a wireless network or a wired network; and the MCPTT server for receiving data from the combined wired/wireless terminal when connected to the combined wired/wireless terminal through any one of the wireless network and the wired network.

Description

MCPTT system based on open cloud OS and its execution method

The present invention relates to a wired/wireless combined terminal and a data transmission method thereof, and more particularly, to an open cloud OS-based MCPTT system and an execution method thereof.

MCPTT (Mission-Critical Push-To-Talk) is a type of GCSE (Group Communication System Enablers) based on an evolved Multimedia Broadcast Multicast Service (eMBMS).

The eMBMS is an LTE-based mobile broadcasting technology defined by 3GPP, and is a technology capable of simultaneously transmitting large-capacity multimedia contents to multiple users. GCSE technology is a group communication technology using eMBMS. MCPTT, a type of GCSE, is an LTE-based push-to-talk service for public safety.

The MCPTT is provided based on eMBMS, and has a function of individual/group emergency calls between terminals, arbitrarily listening to the ambient sound of a specific user terminal in a remote location, and forcibly resending a call from the operation center to the terminal in an emergency.

The eMBMS-based MCPTT includes a unicast method and a multicast method. In the unicast method, since the center and the terminal are provided with a 1:1 communication method, it is impossible to simultaneously transmit data to a plurality of terminals in a specific area. If multimedia data needs to be transmitted to each terminal, the number of terminals is limited due to an increase in communication load.

On the other hand, in the multicast method, since the center and the terminal are provided with a 1:N communication method, it is possible to simultaneously transmit data to a plurality of terminals in a specific area. Of course, even when transmitting multimedia data, the number of terminals is not limited without an increase in communication load.

However, the disaster network MCPTT app operating on the existing Android platform is designed to operate only on the Android OS, and terminals for this purpose are composed of the ONE CHIP method.

The present invention is an open cloud OS that allows an app developed based on an open OS-based cloud OS to provide MCPTT connection maintenance that can use both wired and wireless at the same time by separating the dual-type AP and CP unlike the existing Android operating system. An object of the present invention is to provide a MCPTT-based system and an execution method thereof.

In addition, the present invention is to provide an open cloud OS-based MCPTT system equipped with a function to cover a faulty area by maximizing survivability by intersecting wired and wireless networks and a function for interworking between heterogeneous types, and an execution method thereof. do.

In addition, the present invention provides a line that can be used by crossing the wire when a failure occurs while using the wireless as the top priority. The provided line detection aims to provide an open cloud OS-based MCPTT system that detects a failure and can be controlled by internal logic that can attempt a wired connection, and an execution method thereof.

In addition, the present invention is for providing various OS environments and terminals based on PS-LTE communication network for interoperability and integrated command communication system for disaster management and response organizations such as firefighting, police, and coast guards to secure interoperability and integrated command communication system in peacetime and disasters. It aims to provide an open cloud OS-based MCPTT system and its execution method based on the 3GPP standard and the requirements of the disaster safety communication network by adding the (desktop) terminal standard plan.

In addition, the present invention is an open cloud OS-based MCPTT system that can ensure the survivability of the commander in places with frequent calls, such as assemblies, demonstrations, etc. with a function that can maximize the police's disaster network communication with a wired and wireless terminal. and to provide a method for implementing the same.

In addition, the present invention is an open cloud OS-based MCPTT system and its implementation that can maximize the response to failures through the automatic switching function using wireless and wire in the command vehicle and command post in the area where major incidents such as assemblies and demonstrations occur when used on a wired/wireless basis The purpose is to provide a method.

In addition, the present invention aims to provide an open cloud OS-based MCPTT system and a method for implementing the same, so that the existing mobile terminal is only capable of a wireless network, and the communication right is not secured (disconnected) in case of a base station failure, so that the ability to cope with the failure can be insufficient. .

In addition, an object of the present invention is to provide an open cloud OS-based MCPTT system equipped with a redundant network function, a wired LAN and a wireless modem, and a function to freely switch according to communication conditions, and an execution method thereof.

In addition, the present invention provides an open cloud OS-based MCPTT system that connects to the IMS network through AKA authentication for wireless functions and provisioning for wired functions to maintain the operating system at all times and to connect to the MCPTT server through MD-5 authentication method and An object of the present invention is to provide a method for implementing it.

In addition, an object of the present invention is to provide an open cloud OS-based MCPTT system and an execution method thereof that enable operation without the execution of two multi-applications by operating a wireless function operation and a wired function operation in one application.

In addition, an object of the present invention is to provide an open cloud OS-based MCPTT system and a method for implementing the same, which enable mutual compatibility between IPv4, which is an existing network environment, and IPv6 address system requiring additional extension.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned may be understood by the following description, and will be more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the appended claims.

An open cloud OS-based MCPTT system for achieving this purpose is a wired/wireless combined terminal for transmitting and receiving data to and from the MCPTT server by accessing the MCPTT server through any one of a wireless network and a wired network based on the cloud OS, the MCPTT server When connected to an authentication server that executes network authentication through different authentication methods depending on whether the type of network connected to the network is a wireless network or a wired network, and the wired/wireless terminal through any one of the wireless network and the wired network and an MCPTT server for receiving data from the wired/wireless terminal.

In addition, the execution method of the open cloud OS-based MCPTT system to achieve this purpose is a wireless network and a wired network in order for a wired/wireless terminal to access the MCPTT server through any one of a wireless network and a wired network based on the cloud OS. providing authentication information to an authentication server through any one network, performing authentication by comparing the authentication information received from the wired/wireless combined terminal with the previously stored authentication information by the authentication server, and performing authentication according to the authentication result Connecting to the MCPTT server through any one of a network and a wired network, and the wired/wireless terminal providing data to the MCPTT server through any one of the wireless network and the wired network.

According to the present invention, the app developed based on the open OS-based cloud OS has the advantage that, unlike the existing Android operating system, the dual-type AP and CP can be separated and wired and wireless can be used at the same time.

In addition, according to the present invention, there is an advantage in that a function of covering a disabled area by maximizing survivability by crossing a wire and a wireless device and a function of interworking between different types are mounted.

In addition, according to the present invention, there is an advantage that, when a failure occurs while using wireless as the top priority, it can be controlled by an internal logic that can attempt a wired connection by detecting the occurrence of a failure by providing a usable line by crossing the wire.

In addition, according to the present invention, it is fixed to provide various OS environments and terminals based on PS-LTE communication network for interoperability and integrated command communication system for disaster management and response organizations such as firefighting, police, and coast guards to secure interoperability and integrated command communication system in peacetime and disasters It has the advantage that it can be based on the 3GPP standard and the requirements of the disaster safety communication network by adding the standard draft for the (desktop) terminal.

In addition, according to the present invention, the emergency network communication of the police with a wired/wireless terminal has the advantage of being able to guarantee the survivability of the commander in a place where the call volume is frequent, such as a rally, demonstration, etc.

In addition, according to the present invention, there is an advantage that, when used on a wired and wireless basis, it is possible to maximize the response to failure through the automatic switching function using wireless and wired in the command vehicle and command post in the area where major events such as assembly, demonstration, etc. occur.

In addition, according to the present invention, the existing portable terminal is only capable of a wireless network and has the advantage that the ability to cope with the failure may be insufficient because the communication right is not secured (not communicated) in the event of a base station failure.

In addition, according to the present invention, there is an advantage that a redundant network function is mounted and a wired LAN and a wireless modem are mounted, so that they can be freely switched according to the communication state.

In addition, according to the present invention, the wireless function has the advantage of being able to connect to the IMS network through AKA authentication and the wired function to maintain the operating system at all times and to connect to the MCPTT server through the MD-5 authentication method.

In addition, according to the present invention, since the wireless function operation and the wired function operation are operated in one application, there is an advantage that it can be operated without executing two multi-applications.

In addition, according to the present invention, there is an advantage that the existing network environment IPv4 and the IPv6 address system requiring additional extension can be used for mutual compatibility.

1 is a network configuration diagram for explaining an open cloud OS-based MCPTT system according to an embodiment of the present invention.
2 is a flowchart for explaining a wireless authentication method of a wired/wireless terminal equipped with an open cloud OS-based MCPTT according to an embodiment of the present invention.
3 is a flowchart illustrating a wired authentication method of a wired/wireless terminal equipped with an open cloud OS-based MCPTT according to an embodiment of the present invention.
4 is a flowchart for explaining a wired network IP acquisition method in case of a wireless network access failure of a wired/wireless terminal equipped with an open cloud OS-based MCPTT according to an embodiment of the present invention.
5 is a flowchart for explaining a method of automatically switching from IPv6 to IPv4 in a wired/wireless terminal equipped with an open cloud OS-based MCPTT according to an embodiment of the present invention.
6 is an exemplary diagram for explaining the execution process of FIG. 5 .
7 is a flowchart illustrating a method for implementing heterogeneous RoIP between an open cloud OS-based MCPTT connection and an external connection port according to an embodiment of the present invention.

The above-described objects, features and advantages will be described below in detail with reference to the accompanying drawings, and accordingly, those of ordinary skill in the art to which the present invention pertains will be able to easily implement the technical idea of the present invention. In describing the present invention, if it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

Among the terms used in this specification, “cloud OS” is based on Debian, which is one of the open OSs. In the case of cloud 2.0, the Linux-based OS is based on Debian 10.

1 is a network configuration diagram for explaining an open cloud OS-based MCPTT system according to an embodiment of the present invention.

Referring to FIG. 1 , the open cloud OS-based MCPTT system includes a wired/wireless combined terminal 100 , an MCPTT server 200 , a wireless network 300 , a wired network 400 , and an authentication server 500 . The authentication server 500 includes an MME 510 , an HSS 520 , a router server 530 , a permission setting server 540 , and an MS 550 .

The wired/wireless combined terminal 100 is connected to the MCPTT server 200 through any one of the wireless network 300 and the wired network 400 . To this end, the wired/wireless terminal 100 may access the wireless network 300 using a CP modem, and may access the wired network using a wired LAN card.

The above-mentioned wired/wireless combined terminal 100 connects to the wired network when an access failure occurs in the wireless network 300 while being connected to the MCPTT server 200 through the wireless network 300 , and the failure of the wireless network 300 . During recovery, the wireless network 300 is connected. As described above, the wired/wireless terminal 100 performs wireless authentication or wired authentication when the access method of the MCPTT server 200 connects to any one of the wireless network 300 and the wired network.

In an embodiment, the wired/wireless terminal 100 authenticates the wireless network 300 through the USIM. First, the wired/wireless terminal 100 provides a wireless authentication request message including the ISMI authentication parameters to the MME 510 of the authentication server 500, and the MME 510 sends a subscriber authentication request message including the ISMI authentication parameters. It is provided to the HSS 520 of the authentication server 500 .

Thereafter, the HSS 520 provides the MME 510 with a subscriber authentication completion message including a random number (RAND) for IM authentication, an authentication token (AUTN) and an expected response (XRES) to the MME 510 and , when the MME 510 of the authentication server 500 receives the subscriber authentication completion message, an expected response (XRES) is stored inside and includes a random number (RAND) and an authentication token (AUTN) for IM authentication provides a wireless authentication information providing message to the wired/wireless terminal 100 .

Then, after receiving the wireless authentication information providing message, the wired/wireless terminal 100 generates a RES by the AKA-MD5 authentication algorithm using a random number (RAND) and an authentication token (AUTN) for IM authentication, and generates the RES It is provided to the MME 510 of the authentication server 500 . Accordingly, the MME 510 of the authentication server 500 compares the RES received from the wired/wireless terminal 100 and the XRES received from the HSS 520 , and generates a wireless authentication result according to the comparison result.

In another embodiment, the wired/wireless terminal 100 provides an authentication request message to the router server 530 and then receives a response message to the authentication request message.

Thereafter, the wired/wireless terminal 100 extracts the IP from the response message received from the router server 530 , and then provides the access information request message including the MAC address corresponding to the IP to the authority setting server 540 . In this case, the MAC address is information pre-registered through the disaster network authentication procedure.

The wired/wireless terminal 100 receives IMS connection information according to the MAC address from the authority setting server 540 (step S330). The wired/wireless terminal 100 provides the SIP registration request message to the IMS 550 in the MD5 method using the IMS connection information.

Through the above process, the wired/wireless terminal 100 is connected to the wired network when an access failure occurs in the wireless network 300 while being connected to the wireless network 300 . That is, the wired/wireless combined terminal 100 may access the wired network by attempting wired provisioning to the MCPTT server 200 when a failure occurs while connected to the wireless network 300 .

In one embodiment, the wired/wireless combined terminal 100 determines the wireless signal strength while connected to the wireless network 300 and if the wireless signal strength is less than or equal to a specific strength, the MCPTT server 200 attempts wired provisioning to make MCPTT It is possible to receive an IP address from the server 200 and connect to a wired network using the IP address received from the MCPTT server 200 .

On the other hand, the wired/wireless combined terminal 100 performs wireless authentication when the wireless network 300 recovers from a failure even if a failure occurs in the wireless network 300 and accesses the wired network while connected to the wireless network 300 , then the wireless network Connect to (300).

At this time, when the wired/wireless terminal 100 recovers from the failure of the wireless network 300 while connected to the wired network and accesses the wireless network 300 again, it can block the connection to the wired network to prevent overlapping access to the network. there is.

In general, the disaster network MCPTT server 200 should support IPv6. The reason for this is that, in a wired network, the VPN gateway application is set to IPv6 and must be connected to the network gateway.

However, for fixed use, when receiving Ethernet packet destination IP from IPV4 and changing to Ethernet IpV4, application TCP/IP packets are delivered, but the SIP message from the MCPTT server 200 deletes the packets from the IPv4 address system, so the call connection fails. .

To this end, the wired/wireless terminal 100 encapsulates a packet maintaining IPv6 into IPv4 and provides the IPv6 packet encapsulated in IPv4 to the MCPTT server 200 . That is, the packet consists of a header and a body, and the data of the header and body encapsulates the packet in IPv4 while maintaining the IPv6 address system, and provides the IPv6 packet encapsulated in IPv4 to the MCPTT server 200 .

2 is a flowchart for explaining a wireless authentication method of a wired/wireless terminal equipped with an open cloud OS-based MCPTT according to an embodiment of the present invention.

Referring to FIG. 2 , the wired/wireless terminal 100 provides a wireless authentication request message including ISMI authentication parameters to the MME 510 (step S210), and the MME 510 requests subscriber authentication including the ISMI authentication parameters. The message is provided to the HSS 520 (step S215).

The HSS 520 provides the MME 510 with a subscriber authentication completion message including a random number (RAND), an authentication token (AUTN) and an expected response (XRES) for IM authentication (step S220). ), when the MME 510 receives the subscriber authentication completion message, an expected response (XRES) is stored therein (step S225), and includes a random number (RAND) and an authentication token (AUTN) for IM authentication. provides a wireless authentication information providing message to the wired/wireless terminal 100 (step S230).

Then, after receiving the wireless authentication information providing message, the wired/wireless terminal 100 generates a RES by the AKA-MD5 authentication algorithm using a random number (RAND) and an authentication token (AUTN) for IM authentication (step S240) ), and provides the RES to the MME 510 (step S245).

Accordingly, the MME 510 compares the RES received from the wired/wireless terminal 100 and the XRES received from the HSS 520 (step S250), and generates a wireless authentication result according to the comparison result (step S255).

3 is a flowchart illustrating a wired authentication method of a wired/wireless terminal equipped with an open cloud OS-based MCPTT according to an embodiment of the present invention.

Referring to FIG. 3 , the wired/wireless terminal 100 provides an authentication request message to the router server 530 (step S310), and then receives a response message to the authentication request message (step S315).

The wired/wireless terminal 100 extracts the IP from the response message received from the router server 530 (step S320), and provides a connection information request message including the MAC address corresponding to the IP to the authority setting server 540. (Step S325). In this case, the MAC address is information pre-registered through the disaster network authentication procedure.

The wired/wireless terminal 100 receives IMS connection information according to the MAC address from the authority setting server 540 (step S330). The wired/wireless terminal 100 provides the SIP registration request message to the IMS 550 in the MD5 method using the IMS connection information (step S335).

4 is a flowchart for explaining a wired network IP acquisition method in case of a wireless network access failure of a wired/wireless terminal equipped with an open cloud OS-based MCPTT according to an embodiment of the present invention.

Referring to FIG. 4 , the wired/wireless terminal 100 determines the wireless signal strength while being connected to the wireless network 300 (step S405) (step S410). If the wireless signal strength is less than or equal to a specific strength as a result of determination (step S413), the wired/wireless terminal 100 attempts wired provisioning to the MCPTT server 200 to receive an IP address from the MCPTT server 200 (step S415) . The wired/wireless terminal 100 may access the wired network using the IP address received from the MCPTT server 200 (step S420).

On the other hand, the wired/wireless combined terminal 100 performs wireless authentication when the wireless network 300 recovers from a failure even if a failure occurs in the wireless network 300 and accesses the wired network while connected to the wireless network 300 , then the wireless network Connect to (300).

At this time, when the wired/wireless terminal 100 recovers from the failure of the wireless network 300 while connected to the wired network and accesses the wireless network 300 again, it can block the connection to the wired network to prevent overlapping access to the network. there is.

5 is a flowchart for explaining a method for automatically switching from IPv6 to IPv4 in a wired/wireless terminal equipped with an open cloud OS-based MCPTT according to an embodiment of the present invention. 6 is an exemplary diagram for explaining the execution process of FIG. 5 .

Referring to FIG. 5 , the wired/wireless terminal 100 sets the header structure and body data to IPv6 (step S510). The wired/wireless terminal 100 encapsulates a packet maintaining IPv6 into IPv4 (step S515). The wired/wireless terminal 100 provides a packet maintaining IPv6 encapsulated in IPv4 to the MCPTT server 200 (step S520).

As described above, there is an advantage that the existing network environment, IPv4, and the IPv6 address system, which requires additional extension, can be used for mutual compatibility.

7 is a flowchart illustrating a method for implementing heterogeneous RoIP between an open cloud OS-based MCPTT connection and an external connection port according to an embodiment of the present invention.

Referring to FIG. 7 , the heterogeneous patch function makes an interconnection call through a function of automatically connecting audio codec-converted data through an external connection port of the wired/wireless terminal 100 with a sound processing-based LTE group call. The made call activates communication between different types through mutual interworking according to the patch method.

First, the wired/wireless terminal 100 is interconnected with the ROIP gateway 600 of the USB method in a physical connection (4wire Audio & 4wire E&M) method (step S710). When the ROIP gateway 600 receives an audio signal, it is controlled by the MCU through codec conversion and converted into a digital signal (step S715), and then provides the digital signal to the wired/wireless terminal 100 (step S720).

When the wired/wireless terminal 100 receives the digital signal, it controls the voice patch by crossing TX/RX through audio streaming (step S725), and transmits it as a digital signal through PS LTE. At this time, the transmitted audio is provided to the user terminal based on MCPTT based on 3GPP R13. At this time, the MCPTT call destination from the user terminal 700 follows the standard standard.

As described above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited to the above-described embodiments, which are various modifications and variations from these descriptions by those skilled in the art to which the present invention pertains. Changes are possible. Therefore, the spirit of the present invention should be understood only by the claims described below, and all equivalents or equivalent modifications thereof will fall within the scope of the spirit of the present invention.

100: both wired and wireless terminal,
200: MCPTT server,
300: wireless network;
400: wired network

Claims (8)

In the case of access failure to the wireless network while connected to the MCPTT server through the wireless network based on the cloud OS, the wireless signal strength is determined while connected to the wireless network, and if the wireless signal strength is below a certain strength, wired provisioning to the MCPTT server to receive an IP address from the MCPTT server, access the wired network using the IP address received from the MCPTT server, a wired/wireless terminal for accessing a network;
an authentication server for executing network authentication through different authentication methods depending on whether the network type connected to the MCPTT server is a wireless network or a wired network;
When connected to the wired/wireless terminal through any one of the wireless network and the wired network, it includes an MCPTT server for receiving data from the wired/wireless terminal,
The authentication server is
When receiving and providing a subscriber authentication request message including ISMI authentication parameters from the wired/wireless terminal, and receiving a subscriber authentication completion message in response to the subscriber authentication request message, an expected response (XRES) is stored inside After providing a wireless authentication information providing message including a random number (RAND) and an authentication token (AUTN) for IM authentication to the wired/wireless terminal, and receiving the RES from the wired/wireless terminal, the RES received from the wired/wireless terminal and an MME that compares the pre-received XRES and generates a wireless authentication result according to the comparison result;
Upon receiving the subscriber authentication request message, the HSS provides a subscriber authentication completion message including a random number (RAND) for IM authentication, an authentication token (AUTN) and an expected response (XRES) to the MME. ;
a router server that provides a response message including an IP when receiving an authentication request message from a wired/wireless terminal;
a permission setting server that, upon receiving a connection information request message including the MAC address corresponding to the IP from the wired/wireless terminal, provides IMS connection information according to the MAC address to the wired/wireless terminal; and
and an IMS that is processed when receiving a SIP registration request message in an MD5 method based on IMS connection information from the wired/wireless terminal;
The wired/wireless terminal is
When accessing the wireless network, a wireless authentication request message including ISMI authentication parameters is provided to the MME, and when a wireless authentication information provision message is received from the MME, a random number (RAND) and an authentication token (AUTN) for IM authentication are used. to generate a RES according to the AKA-MD5 authentication algorithm, provide it to the MME, provide an authentication request message to the router server, and receive a response message to the authentication request message. After extracting the IP from the response message, the The access information request message including the MAC address corresponding to the IP is provided to the authority setting server, and a SIP registration request message is provided to the IMS in the MD5 method using the IMS access information according to the MAC address from the authority setting server to the IMS for wireless access to run authentication
MCPTT system based on open cloud OS.
delete delete delete When an access failure occurs in the wireless network while the wired/wireless terminal is connected to the MCPTT server through the wireless network based on the cloud OS, the wireless signal strength is determined while connected to the wireless network, and if the wireless signal strength is less than a specific strength, the MCPTT server Receiving an IP address from the MCPTT server by attempting wire provisioning on the ;
connecting the wired/wireless terminal to a wired network using the IP address received from the MCPTT server; and
Even if the wired/wireless terminal accesses the wired network, blocking the connection to the wired network and accessing the wireless network when the wireless network is restored from failure;
The step of blocking access to the wired network and connecting the wired/wireless terminal to the wireless network includes:
receiving, by the MME of the authentication server, a subscriber authentication request message including ISMI authentication parameters from a wired/wireless terminal, and providing the message to the HSS of the authentication server;
Providing, by the HSS of the authentication server, a subscriber authentication completion message including a random number (RAND) for IM authentication, an authentication token (AUTN) and an expected response (XRES) to the MME of the authentication server ;
When the MME of the authentication server receives the subscriber authentication completion message, an expected response (XRES) is stored therein, and wireless authentication information including a random number (RAND) for IM authentication and an authentication token (AUTN) is provided. providing a message to the wired/wireless terminal; and
When the MME of the authentication server receives the RES from the wired/wireless terminal, comparing the RES received from the wired/wireless terminal and the pre-received XRES, and generating a wireless authentication result according to the comparison result and providing it to the wired/wireless terminal including,
The step of blocking access to the wired network and connecting the wired/wireless terminal to the wireless network includes:
providing, when the router server of the authentication server receives an authentication request message from the wired/wireless terminal, a response message including the IP to the wired/wireless terminal;
providing, by the authority setting server of the authentication server, IMS connection information according to the MAC address to the wired/wireless terminal, when receiving a connection information request message including the MAC address corresponding to the IP from the wired/wireless terminal; and
and processing, when the IMS of the authentication server receives the SIP registration request message in the MD5 method based on the IMS connection information from the wired/wireless terminal.
A method of running MCPTT system based on open cloud OS. delete delete delete

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