KR101686417B1 - Gateway server system for providing connection maintenance between central control server and terminal of vehicle in the 3G/LTE wireless networks and control method thereof - Google Patents

Abstract

The present invention relates to a gateway server system for providing continuity of a connection between a control server and a vehicle terminal in a 3G or LTE wireless network, and also relates to a method for controlling the gateway server system. More specifically, the present invention relates to a gateway server system for providing continuity of a connection between a control server and a vehicle terminal in a 3G or LTE wireless network, which can detect an interruption adapted to occur in a connection for data communication with a currently connected control server or adapted to be caused by a change in an IP address of a vehicle terminal during handoff between wireless base stations attributable to movement of a vehicle, which can reestablish the connection, and which can resume the data communication, thereby maintaining continuity of the connection. For this purpose, according to the present invention, provided is the gateway server system for providing continuity of a connection between a control server and a vehicle terminal in a 3G or LTE wireless network, i.e., a network system for providing a connection between a control server and at least one vehicle terminal in a 3G or LTE wireless network including the vehicle terminal capable of communicating with the control server, the gateway server system comprising a gateway server which enables the at least one moving vehicle terminal and the control server to communicate with each other over the 3G or LTE wireless network, which assigns a reserved connectable IP address to the vehicle terminal in response to a request for a change in connection information for an IP address of the vehicle terminal during handoff attributable to transition between base stations for the vehicle terminal, and which changes the connection information based on a new IP address of the vehicle terminal via the assigned reserved IP address and a port, so the connection between the vehicle terminal and the control server can be continuously maintained in an IP address-based communication environment. Furthermore, also provided is the method for controlling the gateway server system. Accordingly, a connection between the vehicle terminal and the control server can be continuously maintained.

Description

Technical Field [0001] The present invention relates to a gateway server system for providing connection continuity between a control server and a vehicle terminal in a 3G / LTE wireless network and a control method thereof. method thereof}

[0001] The present invention relates to a gateway server system and a control method thereof, which can provide connection continuity of an IP-based communication environment between a car sharing service control server and a vehicle terminal, and more particularly, The mobile terminal detects that the data communication with the control server is disconnected due to the change of the IP address of the vehicle terminal during the handoff between the wireless base stations according to the movement of the vehicle, In a gateway server system and a control method thereof, which provides continuity of connection between a control server and a vehicle terminal in a 3G / LTE wireless network that enables a connection state between a vehicle terminal for a car sharing service and a control server to be maintained continuously in an IP-based communication environment .

Due to the recent development of IoT (Internet Of Things) technology, various types of vehicle terminals such as buses, taxis, rental cars, car-sharing vehicles are attached to 3G terminals and LTE networks.

These vehicle terminals periodically transmit various driving information of the vehicle to the control server for car sharing service, FMS (Fleet Management System), location tracking, start control, etc., or download the control code from the control server However, since vehicles equipped with such vehicle terminals are moved at a high speed in a large distance at a high speed, vehicle terminals are likely to be in an environment where handoffs frequently occur between mobile communication base stations while communicating with a control server in a 3G or LTE network .

That is, as illustrated in the schematic diagram of the conventional car sharing network of FIG. 1, most of the vehicle terminals 100 are currently controlled by TCP (Transmission Control Protocol) / UDP (User Datagram Protocol) based socket communication or HTTP (Hypertext Transfer Protocol) The control server 300 transmits data to the vehicle terminal 100 through the SMS (Short Message Service) server 210. [ At this time, the reason why the control server 300 transmits data to the vehicle terminal 100 using the SMS is that the vehicle terminal 100 mounted on the vehicle moving at a high speed as described above frequently performs the handoff of the base station And thus the IP address allocated by one base station is changed to another IP address in the handoff process, so that it is impossible to use the seamless IP based data communication. Therefore, when data is transmitted from the control server to the vehicle terminal, a method of sending a control code using SMS to a telephone number assigned to each vehicle terminal is widely used to identify a specific terminal regardless of a handoff.

However, in the conventional car sharing network as described above, it is necessary to interwork with a separate IOT service provided by a mobile communication company in constructing a service in the LTE network, which may cause further development costs.

Also, in the above-described conventional car sharing network, when the vehicle terminal transmits data to the control server using the TCP / UDP-based socket communication or the HTTP method, a method of checking whether the control server 100% There was no. The reason for this is that in the step of maintaining the private IP address matching with the public IP address in the Gateway GPRS Support Node (hereinafter, abbreviated as 'GGSN') of the mobile communication company, If the connection is not made for one hour, the connection to the IP address will not be supported again. If the vehicle terminal enters the shadow area of the TCP connection (sending a message) and the TCP If the vehicle stays in the shaded area for more than one hour with the port open, it can happen that it can not reconnect with the control server with the IP address.

In addition, in the above conventional car sharing network, when the control server transmits the SMS to the vehicle terminal through the SMS server, the size of the data that can be contained in one SMS is limited and only the text type data can be transmitted. There is a limitation in that it is impossible to transmit multimedia data or binary data such as the data. In addition, the data transmission method using the SMS has a disadvantage that it can not be used for general purpose because it differs according to countries and operators as well as a response delay time and a delay of about 10 ~ There was a concern that excessive SMS costs would be incurred if the scale increased.

KR 10-2006-0127571 A 2006.12.13. open

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a mobile terminal, When the IP address of the vehicle terminal is changed due to the handoff between the wireless base stations and the data communication with the currently connected control server is broken, it is detected that the connection is established again and the communication can be resumed quickly, The present invention provides a gateway server system and a control method thereof that provide connection continuity between a control server and a vehicle terminal in a 3G / LTE wireless network, which enables a connection status of an IP-based communication environment to be continuously maintained between a terminal and a control server.

According to an aspect of the present invention, there is provided a network system for providing a connection between a control server and a vehicle terminal in a 3G or LTE wireless network including at least one vehicle terminal capable of communicating with a control server, Or at least one vehicle terminal that is moving in an LTE radio network and a control server, and is provided with a spare IP address that can be connected according to a request to change the IP address access information of the vehicle terminal at the time of hand- The connection information is changed (reconnected) to the new IP address of the vehicle terminal through the assigned spare IP address and port, and the connection between the vehicle terminal and the control server is continuously maintained in the IP-based communication environment Connection between control server and vehicle terminal in 3G / LTE wireless network including gateway server It is a gateway server system that provides persistence.

According to another aspect of the present invention, there is provided a connection maintenance control method in a network system having a gateway server supporting an IP-based communication environment between a vehicle terminal and a control server moving in a 3G or LTE wireless network (A) a first step in which the vehicle terminal confirms that the IP address is changed upon handoff between the wireless base stations and requests reconnection (change of connection information) to a new IP address to the gateway server, (b) A second step of confirming a reconnection (change of connection information) request from the vehicle terminal to a new IP address and changing the access information of the corresponding vehicle terminal to a new IP address; And (c) a third step in which the vehicle terminal resumes connection between the control server and the control server in the 3G / LTE wireless network that continuously maintains connection between the vehicle terminal and the control server in the IP-based communication environment A gateway server system control method for providing connection continuity between vehicle terminals.

According to the present invention, various vehicle terminals communicating in a wireless network, such as 3G or LTE, confirm that the IP address is changed at the time of handoff according to the switching between the base stations, change the connection information of the vehicle terminal, It is possible to maintain the connection at the time of handoff between the wireless base stations according to the movement of the vehicle and to ensure quick connection when the mobile communication service network is changed. Accordingly, the data communication between the vehicle terminal and the control server can be prevented, It is possible to provide continuity of the connection state between the terminal and the control server.

In addition, according to the present invention, it is possible to encrypt data between the vehicle terminal and the control server, and it is possible not only to maintain a high transmission rate with respect to the SMS, but also to reduce costs due to SMS unused, various types of data transmission, There is an advantage that an additional service is enabled, and an independent service environment can be realized by a communication service provider.

1 is a schematic view illustrating a configuration of a conventional car sharing network.
FIG. 2 is a schematic view illustrating a gateway server system providing connection continuity between a control server and a vehicle terminal in a 3G / LTE wireless network according to the present invention.
3 is a block diagram illustrating the internal configuration of the gateway server of FIG.
4A and 4B are flowcharts of control operations for maintaining the connection between the vehicle terminal and the control server of FIG.

Hereinafter, a configuration and operation of a gateway server system and a control method thereof for providing continuity of connection between a control server and a vehicle terminal in a 3G / LTE wireless network according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings. Will be described in detail.

It is to be understood that the words or words used in the present specification and claims are not to be construed in a conventional or dictionary sense and that the inventor can properly define the concept of a term in order to describe its invention in the best possible way And should be construed in light of the meanings and concepts consistent with the technical idea of the present invention. Therefore, it should be understood that the embodiments described herein and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and that various equivalents and modifications may be made thereto at the time of the present application shall.

FIG. 2 is a schematic view illustrating the overall configuration of a gateway server system that provides connection continuity between a control server and a vehicle terminal in a 3G / LTE wireless network according to the present invention. FIG. 3 is a block diagram illustrating a detailed configuration of the gateway server of FIG. In these drawings, a gateway server 500, which is a main part of the present invention, is connected between a vehicle terminal 100 mounted on each vehicle and a control server 300 that centrally controls a car sharing service. The present invention is applied to a car sharing service system that is implemented to be communicable through a network. However, it is to be understood that the present invention is not limited thereto, and is merely an example for facilitating understanding of the present invention.

As illustrated in FIG. 2, the present invention can be applied to at least one vehicle terminal 100 mounted on each moving vehicle in a 3G or LTE wireless network, communication with each vehicle terminal 100, And a gateway server 500 for communicably connecting the vehicle terminal 100 and the control server 300 in a 3G or LTE network, The gateway server system according to the present invention can be used for a connection between the control server 300 and the vehicle terminal 100 in a 3G or LTE wireless network including at least one vehicle terminal 100 capable of communicating with the control server 300. [ The present invention can be implemented by being applied to a network system that provides a network.

As illustrated in FIG. 3, the vehicle terminal 100 periodically transmits a heartbeat to the gateway server 500 to maintain connection with the control server 300, reports that the connection is maintained, The gateway server 500 transmits the changed IP address information to the gateway server 500, requests the change (reconnection) of the access information to the new IP address, and resumes the existing data transmission upon reconnection . The vehicle terminal 100 includes a connection management unit 110. The connection management unit 110 includes a connection maintenance report unit 111, an IP address change confirmation unit 112, a reconnection request unit 113, And a transmission resumption unit 114. [0033] FIG. The components of the connection management unit 110 may be implemented as a combination of any one or both of a hardware module and a software module. Here, since the connection management by the packet communication proceeds in a state in which the connection is already established, the transmission period of the heartbeat is preferably about 40 to 60 minutes. However, if necessary, it may be transmitted in a shorter period.

The connection maintaining report unit 111 periodically transmits a heartbeat to the terminal connection unit 511 in the gateway server 500 to report that the connection with the control server 300 is maintained.

The IP address change confirming unit 112 confirms whether the IP address is changed at the time of handoff according to the base station switching constituting the 3G or LTE network to which the vehicle terminal 100 is connected by the movement of the vehicle.

The reconnection request unit 113 transmits the changed new IP address information to the terminal connection unit 511 in the gateway server 500 when the IP address change confirmation unit 112 determines that the IP address has changed, To request the reconnection of the connection information.

The transfer resumption unit 114 resumes the existing data transfer upon reconnection to the changed IP address as a result of the reconnection request by the reconnection request unit 113. [ At this time, data transmitted by the vehicle terminal 100 includes monitoring information of the battery voltage and unattended removal of the vehicle, state information (gear, battery voltage, taillight, starting state, etc.), position information, Vehicle usage history information, and the like.

In the case of a server that controls a car sharing service, the control server 300 receives vehicle inquiry and reservation information in response to a service use request, inquires and presents usable vehicle information and its location information, Transmits the reservation information to the vehicle terminal 100 mounted in the vehicle, wirelessly transmits the reservation information to the vehicle terminal 100, receives the usage history information of the vehicle transmitted from the vehicle terminal 100, Settlement processing can be performed.

As illustrated in FIGS. 2 and 3, the gateway server 500 is provided between at least one vehicle terminal 100 and a control server 300 that are moving in a 3G or LTE wireless network, and is provided in a 3G or LTE wireless network The mobile terminal 100 is connected to the control server 300 in a bidirectional manner in an IP-based communication environment so that at least one vehicle terminal 100 in motion can communicate with the control server 300 in a bidirectional manner, (Reconnects) the connection information to the new IP address of the vehicle terminal 100 through the allocated spare IP address and port, and transmits the IP-based Thereby continuously maintaining the connection between the vehicle terminal 100 and the control server 300 in a communication environment.

The gateway server 500 may include a reconnection setting unit 510, a data processing unit 520, a terminal data cache unit 530, and an external data adapter unit 540.

The reconnection establishing unit 510 includes a terminal connection unit 511 for managing connection through the 3G or LTE network with the vehicle terminal 100 installed in at least one vehicle, The connection state between the vehicle terminal 100 and the gateway server 500 is maintained including the IP operation unit 512 connected to the terminal connection unit 511 and interlocked with the device data cache unit 530.

The data processing unit 520 is connected to the terminal connection unit 511, receives packet data transmitted from the vehicle terminal 100, performs encryption processing, and transmits the encrypted data to the external data adapter unit 540 for management.

The terminal data cache unit 530 stores data received from the vehicle terminal 100 for rapid data transmission and checks the change with the IP operation unit 512. [

The external data adapter unit 540 processes the protocol data between the vehicle terminal 100 and the control server 300 and maintains and manages bidirectional data according to the connection.

4A and 4B are diagrams illustrating an operation flow performed for maintaining a connection between a vehicle terminal and a gateway server in the CAS sharing network of FIG. A second step (b) of processing by the gateway server (500), and a third step (c) of processing by the vehicle terminal (100) The control method may be implemented in a network system having a gateway server 500 supporting an IP-based communication environment between the vehicle terminal 100 and the control server 300 that are moving in the 3G or LTE wireless network.

4A is a flowchart illustrating an operation of the vehicle terminal 100. As illustrated in FIG. 4A, the first step (a) is a step of determining whether the IP address of the vehicle terminal 100 is changed at the time of hand- (Step S108). If there is a change in the IP address information due to the handoff, it is checked whether there is a spare IP address connectable to the gateway server 500 (steps S109 and S110) , The gateway server 500 transmits the changed IP address information of the vehicle terminal 100 to the gateway server 500 to change (reconnect) the access information to the changed IP address, (Step S111).

In the first step (a), power is applied to the vehicle terminal 100 (S101) and the IP address is allocated (S102) in the first 3G or LTE GGSN and the gateway server 500 is periodically The event data may be transmitted to the gateway server 500 (S106, S107) at the time of occurrence of the event while the heartbeat for the connection maintenance report is transmitted (S104, S105).

4B is a flowchart illustrating an operation of the gateway server 500. As illustrated in FIG. 4B, the second step (b) is a step in which the gateway server 500 changes the access information from the vehicle terminal 100 to a new IP address (S506). If the connection request information is changed from the vehicle terminal 100 to the new IP address, the gateway server 500 transmits the connection information of the corresponding vehicle terminal 100 to the new IP address (Step S507). In the second step (a), the gateway server 500 starts monitoring the vehicle terminal 100 (S501), waits for data reception from the vehicle terminal 100 (S502), and for each data reception (S503) (S504) for encryption or the like for transmission of the corresponding data in the control unit 520 and transmitting the data to the control server 300 (S505) through the external data adapter unit 540. [

In the third step (c), the vehicle terminal 100 receives and updates the preliminary IP address list from the gateway server 500 and resumes the connection with the control server 300 to the new IP address which is changed in connection through the preliminary IP address and port (Step S112).

Detailed operation and effect of the gateway server system and control method for providing connection continuity between the control server and the vehicle terminal in the 3G / LTE wireless network according to the present invention will be described below.

When the power is applied (S101) and the IP address is allocated (S102) in the first 3G or LTE GGSN, the vehicle terminal 100 checks whether a predetermined time has elapsed in the waiting state (S103) The gateway server 500 periodically transmits a heartbeat to the gateway server 500 in step S105 to report that the connection is maintained and confirms whether an event has occurred in step S106, (S107). ≪ / RTI >

In this state, the vehicle terminal 100 confirms whether the IP address is changed at the time of handoff between the wireless base stations according to the vehicle movement (S108) in the first step (a), and changes the IP address information (Y branch in S108), it is checked whether there is a spare IP address of the gateway server 500 (S109), and it is confirmed whether the detected spare IP address is connectable (S110).

If there is a spare IP address that can be connected to the gateway server 500 (Y branch of S110) as a search result at this time, the changed new IP address information of the vehicle terminal 100 is transmitted to the gateway server 500, (Reconnect) the connection information to the new IP address changed in step S111.

The gateway server 500 starts monitoring the vehicle terminal 100 through the terminal connection unit 511 in step S501 and waits for data to be received from the vehicle terminal 100 in step S502. (S503). When data is received (Y branch in S503), the data processing unit 520 performs preprocessing such as encryption (S504) in order to transfer the corresponding data (Step S505) to the control server 300 through the control unit 540.

The gateway server 500 confirms whether a request to change (reconnect) the access information from the vehicle terminal 100 to the new IP address is received (S506), and as a result, The gateway server 500 interlocks the IP operation unit 512 and the terminal data cache unit 530 to change the connection information of the corresponding vehicle terminal 100 to a new IP address (step S504) IP address (S507), and transmits the preliminary IP address list to the vehicle terminal 100. The second step is to change the IP address to the IP address (S507).

Finally, the vehicle terminal 100 receives the preliminary IP address list transmitted from the gateway server 500, updates the preliminary IP address list, and resumes the connection with the control server 300 to the new IP address, Step S112 is performed.

Since the present invention can be applied to mobile communication service environments in which packet services are supported regardless of 3G, LTE or GPRS (GSM), CDMA, etc., it is possible to maintain a connection at handoff between base stations through a gateway server, It is possible to ensure quick reconnection when the network is changed, and it is possible to continuously manage the configuration of the vehicle terminal.

Further, the present invention enables encryption support such as AES, DES, etc. for communication between the vehicle terminal and the gateway server, and can be configured by HTTPS or SSL for the communication between the gateway server and the control server. Therefore, It provides the advantage of enabling encrypted transmission.

In addition, since the present invention has a structure that is easy to expand service to foreign countries as well as the domestic market while maintaining compatibility with existing systems, the present invention can provide a rental car, an FMS, and a car sharing service provider using existing vehicle terminals, And provides an advantage that the protocol between the vehicle terminal and the control server can be used without modification.

In addition, since connection persistence can be maintained in an IP-based communication environment, a large amount of multimedia data can be freely and smoothly transmitted and transmitted, and various types of data such as multimedia data and binary data can be quickly transmitted through high- This provides the advantage.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Modification is possible. Accordingly, it is intended that the scope of the invention be defined by the claims appended hereto, and that all equivalent or equivalent variations thereof fall within the scope of the present invention.

100: vehicle terminal 110: connection management unit
111: connection maintaining reporting unit 112: IP address change confirmation unit
113: reconnection request unit 114:
300: control server 500: gateway server
510: reconnection setting unit 511: terminal connection unit
512: IP operation unit 520: Data processing unit
530: terminal data cache unit 540: external data adapter unit

Claims (7)

A network system for providing a connection between the control server (300) and a vehicle terminal (100) in a 3G or LTE wireless network including at least one vehicle terminal (100) capable of communicating with a control server (300)
(100) and a control server (300) that are in motion in a 3G or LTE wireless network and are capable of communicating between the vehicle terminal (100) and the control server (300) Allocates a connectable spare IP address to the corresponding vehicle terminal 100 in response to the address access information change request, and changes (redirects) the access information to the new IP address of the vehicle terminal 100 through the assigned spare IP address and port And a gateway server 500 for continuously maintaining a connection between the vehicle terminal 100 and the control server 300 in an IP-based communication environment,
The gateway server (500)
A terminal connection unit 511 which manages connection with the vehicle terminal 100 mounted on at least one or more vehicles and maintains connection with the vehicle terminal 100 by managing connection through the 3G or LTE network, A reconnection establishing unit 510 including an IP manipulation unit 512 interlocked with the device data cache unit 530 for connection management;
A data processing unit 520 for receiving, encrypting and managing packet data transmitted from the vehicle terminal 100;
A terminal data cache unit 530 for storing data received from the vehicle terminal 100 and checking a change for quick data transmission; And
And an external data adapter unit (540) for processing protocol data between the vehicle terminal (100) and the control server (300) and for maintaining and managing data according to the connection,
The vehicle terminal (100)
Transmits a heartbeat for reporting that the connection is maintained periodically to the terminal connection unit 511 in the gateway server 500,
It is checked whether the IP address is changed at the time of handoff according to the switching of the base station constituting the 3G or LTE network to which the vehicle terminal 100 is connected by the movement of the vehicle. And a connection management unit (110) for transmitting the changed IP address information to the terminal connection unit (511), requesting reconnection to the changed IP address, and resuming the existing data transmission upon reconnection,
The connection management unit 110,
A connection maintenance report unit (111) for periodically transmitting a heartbeat for reporting that the connection with the control server is maintained to the terminal connection unit (511) in the gateway server (500);
An IP address change confirmation unit 112 for confirming whether or not the IP address is changed when handoff is performed in accordance with the base station switching constituting the 3G or LTE network to which the vehicle terminal 100 is connected by the movement of the vehicle;
When the IP address change confirmation unit 112 confirms that the IP address has changed, the changed IP address information is transmitted to the terminal connection unit 511 in the gateway server 500 to request reconnection to the changed IP address A request unit 113; And
And a transmission resumption unit (114) for resuming the existing data transmission upon reconnection to the changed IP address as a result of the reconnection request by the reconnection request unit (113). Gateway server system that provides persistence of connection between control server and vehicle terminal in network delete delete delete delete delete delete

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