KR102434818B1 - Base station, communication method and computer program for disaster-safety communication network that covers disaster site - Google Patents

Abstract

A disaster safety communication network base station covering a disaster site responds to receiving a response message including a connection establishment message transmission unit for transmitting a connection establishment message to a mobile communication network device, and a plurality of parameters related to transmission of a status report message from the mobile communication network device It may include a message receiving unit, a connection establishment unit performing a connection with the mobile communication network device, and a status report message transmitting unit periodically transmitting a status report message to the mobile communication network device based on predetermined timing information and a plurality of parameters.

Description

BASE STATION, COMMUNICATION METHOD AND COMPUTER PROGRAM FOR DISASTER-SAFETY COMMUNICATION NETWORK THAT COVERS DISASTER SITE

The present invention relates to a disaster safety communication network base station, a communication method, and a computer program covering a disaster site.

Looking at the general 5G-based commercial mobile communication network network structure, the base station is connected to AMF (Access and Mobility Management Function)/MME (Mobility Management Entity) equipment and N2/S1-MME Interface (NGAP/S1AP) equipment among core equipment.

Here, the AMF/MME equipment is an equipment that determines and authenticates whether a user of a user terminal accessing a base station is a valid subscriber, and provides data requested from the user terminal. That is, the base station may provide a service to the user terminal after the connection establishment with the AMF/MME equipment is completed.

Meanwhile, the state of the base station is managed through an EMS (Element Management System) system.

Specifically, the first method of checking the status of the base station is a method of checking the status of the base station by using an EMS system having an interface directly connected to the AMF/MME equipment. That is, the commercial mobile communication network base station may be managed using whether the N2/S1-MME interface connected to the AMF/MME equipment is activated, or the AMF/MME equipment may periodically receive status information of the currently serviced base station.

The second method of checking the status of the base station is at least among SMF (Session Management Function) equipment, UPF (User Plane Function)/P-GW (PDN-Gateway) equipment, S-GW (Serving-Gateway) equipment, and the operator's core network. It is a method of receiving the status information of the base station through the EMS system using one.

On the other hand, in the case of a currently commercialized disaster safety communication network (eg, PS-LTE (Public Safety-LTE) and RAN-sharing (LTE-R using Radio access network Sharing)), a base station using a general commercial mobile communication network method is used. is managing Mainly, it manages and monitors the status of the base station using the EMS system directly connected to the MME equipment.

As described above, when the state of the base station is managed using the EMS system like a general commercial mobile communication network in the disaster safety communication network, there is an overload problem in the existing network. This causes a problem that did not occur in the commercial mobile communication network method because the usage pattern of the user terminals using the disaster safety communication network is irregular compared to the commercial mobile communication network method.

In addition, in order to recover the N2/S1-MME equipment due to a network problem in the current commercial mobile communication network, it is inevitably necessary to start over from the interface setup. That is, there was a hassle of having to perform an operation conforming to the standard again between the AMF/MME equipment and the base station.

Japanese Laid-Open Patent Publication No. 2010-178039 (published on August 12, 2010)

The present invention is intended to solve the problems of the prior art, and to check the service state of the disaster safety communication network base station without being affected by the connection state between the AMF/MME equipment and the existing base station.

In addition, the present invention intends to manage and maintain the current state of the disaster safety communication network base station without overloading the existing network functions.

In addition, the present invention intends to reduce overload due to connection restoration by performing a minimum connection establishment procedure even during a reboot operation of a disaster safety communication network base station.

However, the technical problems to be achieved by the present embodiment are not limited to the technical problems described above, and other technical problems may exist.

As a technical means for achieving the above-described technical problem, the disaster safety communication network base station covering the disaster site according to the first aspect of the present invention includes a connection establishment message transmission unit for transmitting a connection establishment message to a mobile communication network device; a response message receiving unit for receiving a response message including a plurality of parameters related to transmission of a status report message from the mobile communication network device; a connection setting unit configured to establish a connection with the mobile communication network device; and a status report message transmitter configured to periodically transmit the status report message to the mobile communication network device based on predetermined timing information and the plurality of parameters.

A communication method performed by a disaster safety communication network base station according to a second aspect of the present invention includes transmitting a connection establishment message to a mobile communication network device; receiving a response message including a plurality of parameters related to transmission of a status report message from the mobile communication network device; establishing a connection with the mobile communication network device; and periodically transmitting the status report message to the mobile communication network device based on the predetermined timing information and the plurality of parameters.

A computer program stored in a computer readable recording medium including a sequence of instructions for providing a disaster communication service performed by a disaster safety communication network base station according to the third aspect of the present invention is connected to a mobile communication network device when executed by a computing device transmit a setup message, receive a response message including a plurality of parameters related to transmission of a status report message from the mobile communication network device, establish a connection with the mobile communication network device, and receive predetermined timing information and the plurality of parameters based on a sequence of instructions for periodically transmitting the status report message to the mobile communication network device.

The above-described problem solving means are merely exemplary, and should not be construed as limiting the present invention. In addition to the exemplary embodiments described above, there may be additional embodiments described in the drawings and detailed description.

According to any one of the above-described problem solving means of the present invention, the present invention can check the service state of the disaster safety communication network base station without being affected by the connection state between the AMF/MME equipment and the existing base station. That is, the service state of the disaster safety communication network base station can be managed irrespective of a situation in which the existing base station is temporarily turned off or the existing base station is newly connected to the AMF/MME equipment.

In addition, the present invention can manage and maintain the current state of the disaster safety communication network base station without overloading the existing network functions.

In addition, the present invention can reduce overload due to connection restoration by performing a minimum connection setup procedure even when the disaster safety communication network base station reboots.

1 is a block diagram of a disaster communication system at a disaster site according to an embodiment of the present invention.
2 is a block diagram of a disaster safety communication network base station shown in FIG. 1 according to an embodiment of the present invention.
3 is an operation flowchart illustrating a connection establishment method between a disaster safety communication network base station and a mobile communication network device according to an embodiment of the present invention.
4 is an operation flowchart illustrating a method of checking whether a service of a disaster safety communication network base station is available, according to an embodiment of the present invention.
5 is an operation flowchart illustrating a method of checking whether a service of a disaster safety communication network base station is available, according to another embodiment of the present invention.
6 is an operation flowchart illustrating a method of checking whether a service is available in a disaster safety communication network base station according to another embodiment of the present invention.
7 is an operation flowchart illustrating a method of confirming whether a service of a disaster safety communication network base station is available, according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. However, the present invention may be embodied in several different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is "connected" with another part, this includes not only the case of being "directly connected" but also the case of being "electrically connected" with another element interposed therebetween. . Also, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

In this specification, a "part" includes a unit realized by hardware, a unit realized by software, and a unit realized using both. In addition, one unit may be implemented using two or more hardware, and two or more units may be implemented by one hardware.

Some of the operations or functions described as being performed by the terminal or device in this specification may be instead performed by a server connected to the terminal or device. Similarly, some of the operations or functions described as being performed by the server may also be performed in a terminal or device connected to the corresponding server.

Hereinafter, detailed contents for carrying out the present invention will be described with reference to the accompanying configuration diagram or process flow diagram.

1 is a block diagram of a disaster communication system at a disaster site according to an embodiment of the present invention.

Referring to FIG. 1 , a disaster communication system may include at least one disaster safety communication network base station 100 and a mobile communication network device 110 .

However, since the disaster communication system of FIG. 1 is only an embodiment of the present invention, the present invention is not limitedly interpreted through FIG. 1 , and may be configured differently from FIG. 1 according to various embodiments of the present invention.

In general, each component of the disaster communication system of FIG. 1 is connected through a network (not shown). A network refers to a connection structure that allows information exchange between each node, such as terminals and servers, and includes a local area network (LAN), a wide area network (WAN), and the Internet (WWW: World). Wide Web), wired and wireless data communication networks, telephone networks, wired and wireless television networks, and the like. Examples of wireless data communication networks include 3G, 4G, 5G, 3rd Generation Partnership Project (3GPP), Long Term Evolution (LTE), World Interoperability for Microwave Access (WIMAX), Wi-Fi, Bluetooth communication, infrared communication, ultrasound communication, Visible Light Communication (VLC), LiFi, and the like, but are not limited thereto.

When a disaster occurs in which a large-scale communication environment is disrupted, the disaster safety communication network base station 100 supporting the disaster safety network network may be temporarily provided in the disaster area. The disaster safety communication network base station 100 may provide a stable communication network to a plurality of user terminals located in a disaster area. At this time, in order to provide a stable communication network service, it is necessary to manage and monitor the service state of the disaster safety communication network base station 100 .

When the disaster safety communication network base station 100 is initially installed in the disaster area, the disaster safety communication network base station 100 may transmit a connection setting message to the mobile communication network device 110 . Here, the mobile communication network device 110 may include, for example, a network element (NE) device.

For example, the disaster safety communication network base station 100 may transmit a connection establishment message to the mobile communication network device 110 based on predetermined timing information. Here, the predetermined timing information may be, for example, information generated based on a unique identification number (eg, serial number) allocated to the disaster safety network communication network base station 100 . In addition, the timing information may be set differently for each disaster safety network base station so that each disaster safety network base station can transmit a specific message (eg, a connection establishment message, a status report message, etc.) to the mobile communication network device 110 at different time points. have.

When the mobile communication network device 110 receives the connection establishment message from the disaster safety communication network base station 100, it includes a plurality of parameters related to the transmission of the status report message to be transmitted by the disaster safety communication network base station 100 as a response to the connection establishment message may transmit a response message to the disaster safety communication network base station 100 .

Here, the plurality of parameters are transmittable time information (TIME_INDEX), start time information (T_INITIAL) of the status report message to be transmitted by the disaster safety communication network base station 100, retransmission period information and retransmission count information of the status report message (MAX_RETX), other At least among the window size information (WINDOW_IN) at the time of initial transmission, information on the amount of window size increase at the time of retransmission (WINDOW_ADD) and the number of base stations connected to the mobile communication network device 110 (TOT_BS) to avoid communication collision between the disaster safety communication network base stations may contain one.

The disaster safety communication network base station 100 may establish a connection with the mobile communication network device 110 based on a response message to the connection establishment message received from the mobile communication network device 110 .

The disaster safety communication network base station 100 may periodically transmit a status report message to the mobile communication network device 110 based on predetermined timing information and a plurality of parameters.

The mobile communication network device 110 may determine whether the state of the disaster safety communication network base station 100 is a serviceable state or a serviceable state based on the status report message received from the disaster safety communication network base station 100 .

Hereinafter, the operation of each component of the disaster communication system of FIG. 1 will be described in more detail.

2 is a block diagram of the disaster safety communication network base station 100 shown in FIG. 1 according to an embodiment of the present invention.

Referring to FIG. 2 , the disaster safety communication network base station 100 may include a connection establishment message transmission unit 200 , a response message reception unit 210 , a connection establishment unit 220 , and a status report message transmission unit 230 . . However, the disaster safety communication network base station 100 shown in FIG. 2 is only one embodiment of the present invention, and various modifications are possible based on the components shown in FIG. 2 .

The present invention interworks with any interface between a disaster safety communication network base station and a network device (eg, AMF, SMF, UPF (5G) / MME, S/P-GW (LTE), etc.) or a direct interface between a security base station It is possible and it is possible to check the current service status of each disaster safety communication network base station using an IP-based SCTP (Stream Control Transmission Protocol) message.

To this end, the connection establishment message transmitter 200 may transmit a connection establishment message to the mobile communication network device 110 . Here, the mobile communication network device 110 may include, for example, a network element (NE) device.

For example, when the disaster safety communication network base station 100 is initially installed at a disaster site and the mobile communication network device 110 is an NE device, the connection establishment message transmission unit 200 is a mobile communication network device based on predetermined timing information. A connection establishment message may be transmitted to 110 . Here, the predetermined timing information may be, for example, information generated based on a unique identification number (eg, serial number) allocated to the disaster safety network communication network base station 100 . In addition, the timing information may be set differently for each disaster safety network base station so that each disaster safety network base station can transmit a connection establishment message at different time points.

As another example, when the disaster safety communication network base station 100 is initially installed at a disaster site, the connection establishment message transmission unit 200 transmits a connection establishment message to the mobile communication network device 110 to attempt a connection with the mobile communication network device 110 . can do. In this case, the connection establishment message may be transmitted, for example, based on [Equation 1] after the disaster safety communication network base station 100 is booted.

[Equation 1]

Message transmission time [sec] = A mod X

Here, A is the identification number (eg, serial number/PCI, etc.) of the disaster safety network communication network base station, and X is the reference time information (eg, 0 to 59 in the case of minutes, 0 to 3599 in the case of hours) to be.

Each of the plurality of disaster safety communication network base stations generates a connection establishment message to be transmitted with the mobile communication network device 110 when booted and transmits it to the mobile communication network device 110. If the connection establishment message is received at the same time, overload may occur in the mobile communication network device 110 . In order to solve this problem, the present application can prevent overloading of the mobile communication network device 110 in advance by allowing each disaster safety communication network base station to transmit the message with a different transmission time of the connection establishment message to be transmitted to the mobile communication network device 110 and , it is possible to increase the success rate of reception of the connection establishment message in the mobile communication network device 110 .

When the mobile communication network device 110 receives the connection establishment message, the response message receiver 210 may receive a response message including a plurality of parameters related to transmission of the status report message from the mobile communication network device 110 .

Here, the response message may include a plurality of parameters related to the period in which the disaster safety communication network base station 100 transmits the status report message. A plurality of parameters included in the response message include transmission available time information (TIME_INDEX), start time information (T_INITIAL) of the status report message to be transmitted by the disaster safety communication network base station 100, retransmission period information of the status report message, and retransmission count information (MAX_RETX) ), window size information (WINDOW_IN) at the time of initial transmission to avoid communication collision between different disaster safety communication network base stations, window size increase information (WINDOW_ADD) at the time of retransmission, and the number of base stations connected to the mobile communication network device 110 (TOT_BS) ) may include at least one of.

Here, the retransmission period information, the retransmission number information, and the window size information may be readjusted based on information on the number of base stations previously connected to the mobile communication network device 110 .

After the connection establishment message is transmitted to the mobile communication network device 110 , the timer operation unit (not shown) may operate a timer for receiving a response message to the connection establishment message from the mobile communication network device 110 .

When the connection establishment message transmission unit 200 does not receive a response message to the connection establishment message from the mobile communication network device 110 until the timer expires, it may retransmit the connection establishment message to the mobile communication network device 110 . . At this time, it is possible to determine the retransmission period and the maximum number of retransmissions of the connection establishment message within the disaster safety communication network base station 100 .

For example, the connection establishment message transmission unit 200 may retransmit the connection establishment message to the mobile communication network device 110 based on the retransmission period and the maximum number of retransmissions determined by the disaster safety communication network base station 100 .

Thereafter, when the mobile communication network device 110 receives the connection establishment message from the disaster safety communication network base station 100, the mobile communication network device 110 may determine the state of the disaster safety communication network base station 100 as a serviceable state. .

When receiving a response message to the connection establishment message from the mobile communication network device 110 , the connection establishment unit 220 may establish a connection with the mobile communication network device 110 .

The status report message transmitting unit 230 periodically sends the disaster safety communication network base station to the mobile communication network device 110 based on the predetermined timing information and a plurality of parameters (a plurality of parameters included in the response message related to the transmission of the status report message). A status report message of (100) may be transmitted.

Here, the timing information may be set differently for each disaster safety communication network base station so that each disaster safety communication network base station transmits a status report message at different times.

For example, the transmission time for transmitting the status report message from the disaster safety network base station 100 to the mobile communication network device 110 every hour is based on 24-bit information of the transmission available time information (TIME_INDEX) parameter of the status report message among a plurality of parameters. can be determined by Here, 24 bits means each time within 24 hours of a day. For example, if TIME_INDEX is set to 0110 0000 0000 0000 0000 0000, the time at which the disaster safety communication network base station 100 can first transmit the status report message is 01:00 to 02:00 and 02:00 to 03 of the day. It could be 0:00. Within the corresponding time, the safety communication network base station 100 may transmit a status report message to the mobile communication network device 110 based on a start time information (T_INITIAL) parameter among a plurality of parameters.

If, in the mobile communication network device 110, the transmission start time information (T_INITIAL) of the status report message is set to 0, the transmission start time information of the status report message using the internal random timer of the safety communication network base station 100 is The status report message may be randomly determined and transmitted to the mobile communication network device 110 based on the randomly determined transmission start time information.

The mobile communication network device 110 receiving the status report message of the disaster safety network base station 100 may determine the status of the disaster safety network base station 100 as a serviceable state based on the status report message.

Meanwhile, when the status report message transmission unit 230 does not receive a response message to the status report message from the mobile communication network device 110, the status report message is sent based on the window size information (WINDOW_IN) included in the plurality of parameters. It can be retransmitted to the mobile communication network device 110 .

For example, when the status report message transmission unit 230 does not receive a response message to the status report message from the mobile communication network device 110 , a specific transmission time point within the window size information WINDOW_IN included in the plurality of parameters may be selected, and the status report message may be retransmitted to the mobile communication network device 110 at the selected specific transmission time point.

Thereafter, when the response message to the status report message is not received from the mobile communication network device 110 , the status report message transmitter 230 transmits window size information (WINDOW_IN) included in a plurality of parameters and a window size at the time of retransmission. The status report message may be retransmitted to the mobile communication network device 110 at the selected specific transmission time point by selecting a specific transmission time point among the summed up period of the increase amount information (WINDOW_ADD). This retransmission of the status report message may be repeated until the retransmission count information (MAX_RETX) included in the plurality of parameters is reached.

On the other hand, when the disaster safety communication network base station 100 is in an OFF state when the disaster safety communication network base station 100 is rebooted, the connection release request message transmission unit (not shown) is sent to the mobile communication network device 110 . You can send a disconnection request message. At this time, the disaster safety communication network base station 100 does not request a response message to the connection release request message from the mobile communication network device 110 in consideration of the rebooting timing. Thereafter, the mobile communication network device 110 that has received the connection release request message from the disaster safety communication network base station 100 determines that the state of the disaster safety communication network base station 100 is in an unserviceable state at the time when the connection release request message is received. can

When the reboot of the disaster safety communication network base station 100 is completed, the connection recovery request message transmission unit (not shown) attempts to restore the service of the disaster safety communication network base station 100 by transmitting a connection recovery message to the mobile communication network device 110 . can

Upon receiving the connection recovery message from the disaster safety communication network base station 100 , the mobile communication network device 110 may transmit a response message to the connection recovery message to the disaster safety communication network base station 100 .

When the response message to the connection recovery message is not received from the mobile communication network device 110, the connection recovery request message transmitter (not shown) sends the connection recovery message based on the window size information (WINDOW_IN) included in the plurality of parameters. It can be retransmitted to the mobile communication network device 110 . In this case, in order to recover the connection with the mobile communication network device 110 , an operation of increasing the window size by the amount of window size increase information (WINDOW_ADD) at the time of retransmission included in the plurality of parameters is not performed.

On the other hand, when a response message to the status check request message is not received from the disaster safety communication network base station 100 or after receiving the connection release request message from the disaster safety communication network base station 100, the connection recovery request message is transmitted to the disaster safety communication network base station ( Until receiving from 100), the mobile communication network device 110 may determine that the state of the disaster safety communication network base station 100 is not serviceable.

When the mobile communication network device 110 does not receive the status report message from the disaster safety communication network base station 100, the mobile communication network device 110 determines the status of the disaster safety communication network base station 100, the disaster safety communication network base station ( 100) to transmit a status check request message.

For example, the mobile communication network device 110 may transmit a status report message to be transmitted by the disaster safety communication network base station 100 among a plurality of parameters included in the response message to the connection establishment message transmitted to the disaster safety communication network base station 100 . A status check request message may be transmitted to the disaster safety communication network base station 100 at a time not selected in the time information TIME_INDEX. When the transmittable time information (TIME_INDEX) is set to '0110 0000 0000 0000 0000 0000', the mobile communication network device 110 sends a status check request message at a specific time of the day except 01:00 to 03:00. It can be transmitted to the communication network base station (100).

When the status check request message is received from the mobile communication network device 110 , the status check request message receiver (not shown) may transmit a response message to the status check request message to the mobile communication network device 110 . In this case, the mobile communication network device 110 may determine the state of the disaster safety communication network base station 100 as a serviceable state based on response information to the status check request message received from the disaster safety communication network base station 100 .

If the mobile communication network device 110 does not receive a response message to the status check request message from the disaster safety communication network base station 100, the mobile communication network device 110 transmits a plurality of parameters (retransmission period) related to the status check request message. Based on the information (T_PERIOD) and the maximum number of retransmission information (RETX_MAX)), the status check request message may be repeated and retransmitted to the disaster safety communication network base station 100 .

At this time, the mobile communication network device 110 does not receive a response message to the status check request message even though it has transmitted the status check request message to the disaster safety communication network base station 100 based on the parameter of the maximum number of retransmission information related to the status check request message. If not, it may be determined that the state of the disaster safety communication network base station 100 is not serviceable.

On the other hand, those skilled in the art may separately implement each of the connection establishment message transmission unit 200, the response message reception unit 210, the connection establishment unit 220 and the status report message transmission unit 230, or at least one of them is integrated. It will be fully understood that it can be implemented.

3 is an operation flowchart illustrating a connection establishment method between a disaster safety communication network base station and a mobile communication network device according to an embodiment of the present invention.

Referring to FIG. 3 , in step S301 , the disaster safety communication network base station 100 may transmit a connection establishment message to the mobile communication network device 110 when the disaster safety communication network base station 100 is initially installed at the disaster site.

In step S303, the disaster safety communication network base station 100 includes a plurality of parameters related to the transmission of a response message to the connection establishment message from the mobile communication network device 110 (that is, the status report message to be transmitted by the disaster safety communication network base station 100). response message). Here, the plurality of parameters are transmittable time information (TIME_INDEX), start time information (T_INITIAL) of the status report message to be transmitted by the disaster safety communication network base station 100, retransmission period information and retransmission count information of the status report message (MAX_RETX), other At least among the window size information (WINDOW_IN) at the time of initial transmission, information on the amount of window size increase at the time of retransmission (WINDOW_ADD) and the number of base stations connected to the mobile communication network device 110 (TOT_BS) to avoid communication collision between the disaster safety communication network base stations may contain one.

In step S305 , when receiving a response message to the connection establishment message from the mobile communication network device 110 , the disaster safety communication network base station 100 may perform a connection with the mobile communication network device 110 .

In the above description, steps S301 to S305 may be further divided into additional steps or combined into fewer steps, according to an embodiment of the present invention. In addition, some steps may be omitted if necessary, and the order between the steps may be changed.

4 is an operation flowchart illustrating a method of checking whether a service of a disaster safety communication network base station is available, according to an embodiment of the present invention.

4, when the connection with the mobile communication network device 110 is performed in step S401, the disaster safety communication network base station 100 transmits a status report message of the disaster safety communication network base station 100 to the mobile communication network device 110. can At this time, the disaster safety communication network base station 100 may operate a timer after transmitting the status report message.

In step S403, if the disaster safety communication network base station 100 does not receive a response message to the status report message from the mobile communication network device 110 until the timer expires, the plurality of parameters received from the mobile communication network device 110 A specific transmission time may be selected from the included window size information WINDOW_IN, and the status report message may be retransmitted to the mobile communication network device 110 at the selected specific transmission time.

When the disaster safety communication network base station 100 does not receive a response message to the status report message retransmitted to the mobile communication network device 110 in step S405, the window size information (WINDOW_IN) included in the plurality of parameters and the window at the time of retransmission It is possible to select a specific transmission time point among the sum of the size increase information (WINDOW_ADD) and retransmit the status report message to the mobile communication network device 110 at the selected specific transmission time point.

When receiving the status report message from the disaster safety communication network base station 100 in step S407, the mobile communication network device 110 may determine that the status of the disaster safety communication network base station 100 is serviceable.

In step S409, the mobile communication network device 110 may transmit a response message to the status report message to the disaster safety communication network base station 100.

In the above description, steps S401 to S409 may be further divided into additional steps or combined into fewer steps, according to an embodiment of the present invention. In addition, some steps may be omitted if necessary, and the order between the steps may be changed.

5 is an operation flowchart illustrating a method of checking whether a service of a disaster safety communication network base station is available, according to another embodiment of the present invention.

5, in step S501, the disaster safety communication network base station 100 sends a connection release request message to the mobile communication network device ( 110) can be transmitted.

In step S503, the mobile communication network device 110 may determine the state of the disaster safety communication network base station 100 as a service unavailable state based on the connection release request message received from the disaster safety communication network base station 100.

In the above description, steps S501 to S503 may be further divided into additional steps or combined into fewer steps, according to an embodiment of the present invention. In addition, some steps may be omitted if necessary, and the order between the steps may be changed.

6 is an operation flowchart illustrating a method of checking whether a service is available in a disaster safety communication network base station according to another embodiment of the present invention.

Referring to FIG. 6 , in step S601 , the disaster safety communication network base station 100 may transmit a connection recovery request message to the mobile communication network device 110 after the reboot of the disaster safety communication network base station 100 is completed. At this time, the disaster safety communication network base station 100 may operate a timer after transmitting the connection recovery request message.

In step S603, when the disaster safety communication network base station 100 does not receive a response message to the connection recovery request message from the mobile communication network device 110 until the timer expires, the plurality of previously received from the mobile communication network device 110 A specific transmission time may be selected from the window size information (WINDOW_IN) included in the parameter of , and a connection recovery request message may be retransmitted to the mobile communication network device 110 at the selected specific transmission time.

When receiving the connection recovery request message from the disaster safety communication network base station 100 in step S605, the mobile communication network device 110 may determine that the state of the disaster safety communication network base station 100 is a serviceable state.

In step S607 , the mobile communication network device 110 may transmit a response message to the connection recovery request message to the disaster safety communication network base station 100 .

In the above description, steps S601 to S607 may be further divided into additional steps or combined into fewer steps, according to an embodiment of the present invention. In addition, some steps may be omitted if necessary, and the order between the steps may be changed.

7 is an operation flowchart illustrating a method of confirming whether a service of a disaster safety communication network base station is available, according to another embodiment of the present invention.

Referring to FIG. 7 , when the mobile communication network device 110 does not receive a status report message from the disaster safety communication network base station 100 at a predetermined period in step S701, to check the status of the disaster safety communication network base station 100, A status check request message may be transmitted to the safety communication network base station 100 .

In step S703, when the mobile communication network device 110 does not receive a response message to the status check request message from the disaster safety communication network base station 100, a plurality of parameters related to the status check request message (retransmission period information (T_PERIOD) and the maximum Based on the number of retransmission information (RETX_MAX)), the status check request message may be repeated and retransmitted to the disaster safety communication network base station 100 .

In step S705, when the mobile communication network device 110 fails to receive a response message to the status check request message even after transmitting the status check request message to the disaster safety communication network base station 100 several times, the state of the disaster safety communication network base station 100 may be judged as unserviceable.

In the above description, steps S701 to S705 may be further divided into additional steps or combined into fewer steps, according to an embodiment of the present invention. In addition, some steps may be omitted if necessary, and the order between the steps may be changed.

An embodiment of the present invention may also be implemented in the form of a recording medium including instructions executable by a computer, such as a program module executed by a computer. Computer-readable media can be any available media that can be accessed by a computer and includes both volatile and nonvolatile media, removable and non-removable media. Also, computer-readable media may include all computer storage media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data.

The foregoing description of the present invention is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and likewise components described as distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. .

100: disaster safety communication network base station
110: mobile network device
200: connection establishment message transmission unit
210: response message receiving unit
220: connection setting unit
230: status report message transmitter

Claims (17)

In a disaster safety communication network base station that covers a disaster site,
a connection establishment message transmitter configured to transmit a connection establishment message to a mobile communication network device;
a response message receiving unit for receiving a response message including a plurality of parameters related to transmission of a status report message from the mobile communication network device;
a connection setting unit configured to establish a connection with the mobile communication network device; and
A status report message transmitter configured to periodically transmit the status report message to the mobile communication network device based on predetermined timing information and the plurality of parameters.
including,
The plurality of parameters include transmission possible time information, start time information, retransmission period information and retransmission count information of the status report message to be transmitted by the disaster safety communication network base station to avoid communication collisions between other disaster safety communication network base stations. The disaster safety communication network base station comprising at least one of window size information and information on the number of base stations pre-connected to the mobile communication network device.
The method of claim 1,
The timing information is generated based on the identification number assigned to the disaster safety communication network base station, the disaster safety communication network base station.
3. The method of claim 2,
The timing information is different for each disaster safety communication network base station so that each disaster safety communication network base station transmits the status report message at different times.
The method of claim 1,
The mobile communication network device will include an NE (Network Element) device, a disaster safety communication network base station.
delete The method of claim 1,
The retransmission period information, the retransmission number information and the window size information are to be readjusted based on information on the number of base stations previously connected to the mobile communication network device, a disaster safety communication network base station.
The method of claim 1,
Based on the status report message, the status of the disaster safety communication network base station is determined to be a serviceable state, the disaster safety communication network base station.
The method of claim 1,
When the response message is not received from the mobile communication network device, the status report message transmitter retransmits the status report message to the mobile communication network device based on the window size information.
In the communication method performed by the disaster safety communication network base station,
transmitting a connection establishment message to a mobile communication network device;
receiving a response message including a plurality of parameters related to transmission of a status report message from the mobile communication network device;
establishing a connection with the mobile communication network device; and
periodically transmitting the status report message to the mobile communication network device based on predetermined timing information and the plurality of parameters;
The plurality of parameters include transmission possible time information, start time information, retransmission period information and retransmission count information of the status report message to be transmitted by the disaster safety communication network base station to avoid communication collisions between other disaster safety communication network base stations. A communication method comprising at least one of window size information and information on the number of base stations previously connected to the mobile communication network device.
10. The method of claim 9,
The timing information will be generated based on the identification number assigned to the disaster safety communication network base station, the communication method.
11. The method of claim 10,
The timing information is different for each disaster safety communication network base station so that each disaster safety communication network base station transmits the status report message at different times.
10. The method of claim 9,
The method of claim 1, wherein the mobile communication network device comprises a Network Element (NE) device.
delete 10. The method of claim 9,
The retransmission period information, the retransmission number information, and the window size information are readjusted based on information on the number of base stations previously connected to the mobile communication network device.
10. The method of claim 9,
Based on the status report message, the state of the disaster safety communication network base station is determined to be a serviceable state, the communication method.
10. The method of claim 9,
When the response message is not received from the mobile communication network device, the method further comprising the step of retransmitting the status report message to the mobile communication network device based on the window size information.
In a computer program stored in a computer readable recording medium comprising a sequence of instructions for providing a disaster communication service performed by a disaster safety communication network base station,
When the computer program is executed by a computing device,
sending a connection establishment message to the mobile network device;
receiving a response message including a plurality of parameters related to transmission of a status report message from the mobile communication network device;
performing a connection with the mobile communication network device;
periodically transmitting the status report message to the mobile communication network device based on the predetermined timing information and the plurality of parameters;
The plurality of parameters include transmission possible time information, start time information, retransmission period information and retransmission count information of the status report message to be transmitted by the disaster safety communication network base station to avoid communication collisions between other disaster safety communication network base stations. A computer program stored in a computer-readable recording medium comprising a sequence of instructions including at least one of window size information and information on the number of base stations pre-connected to the mobile communication network device.

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