KR20180029514A - Networlk device and control method thereof - Google Patents

Abstract

According to the present invention, disclosed is a technique for improving the quality of Internet of things (IoT) services. A frequency band of an IoT base station in which a signal disturbance has occurred can be changed by realizing an IoT base station frequency band change method suitable for an IoT network. The present invention relates to a network device and a control method thereof, wherein the network device comprises: a packet receiving portion; a verification portion; and a control portion.

Description

NETWORK DEVICE AND CONTROL METHOD THEREOF [0001]

The present invention relates to an Internet IoT (IoT) technology, and more particularly to an IoT base station frequency band suitable for an IoT network in which a frequency band of an IoT base station can be changed when a signal disturbance occurs in a side of an IoT base station acting as a gateway The present invention relates to a technique for realizing a change plan.

Internet of Things (IoT) technology, which connects information of living things through wired / wireless networks in various fields such as healthcare, remote meter reading, smart home, smart car and smart farm, is attracting attention.

The following is a brief description of the IoT network structure for providing the Internet (IoT) service based on the Internet (IoT) technology.

The IoT network includes a customer terminal equipped with a thing Internet terminal at a remote place, a thing Internet application (hereinafter referred to as " IoT app ") for checking the data of the things Internet terminal at a remote place and controlling the things Internet terminal, And a base station (hereinafter referred to as IoT base station) serving as a gateway for performing packet transmission / reception between a network device (or an IoT app server) for connecting terminals (IoT apps) through a wired / wireless network, .

In the Internet Internet Protocol (IoT) service provided in the IoT network structure, when the Internet terminal sends the uplink packet to the network device, the Internet terminal sends the uplink packet in a broadcast manner, The IoT base station of the base station receives and transmits to the network device.

In addition, in the Internet Internet (IoT) service, when a network device transmits a downlink packet to a destination Internet terminal, the network device transmits a downlink packet to one IoT base station selected by the destination Internet terminal, And one IoT base station transmits to the object Internet terminal.

In such an IoT network, it is defined to use the uplink / downlink frequency band equally, and does not introduce a high degree of computation to the IoT base station which only serves as a gateway.

Thus, in the IoT network, even if a signal disturbance due to malicious attack or jamming by a third party or other network occurs on the IoT base station side, it is impossible for the IoT base station itself to change the frequency band.

That is, in the current Internet (IoT) technology, there is not proposed a separate method of changing the frequency band of the IoT base station in order to avoid signal disturbance when signal disturbance occurs in the IoT base station side.

On the other hand, the IoT network defines signaling for changing the transmission frequency band of the object Internet terminal based on the network.

Accordingly, in the present invention, when signal disturbance is generated in the IoT base station side by using signaling for changing the transmission frequency band of the object Internet terminal, the IoT base station frequency band change suitable for the IoT network I would like to propose a plan.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an IoT base station frequency band changing method suitable for an IoT network, , And to improve the quality of Internet (IoT) services.

According to a first aspect of the present invention, there is provided a network device including: a packet receiving unit for receiving an uplink packet of a terminal through two or more base stations; A confirmation unit for checking whether there is a specific base station in which signal disturbance has occurred among the two or more base stations; And a controller for using only the uplink packets received through the remaining base stations of the two or more base stations except for the specific base station when the specific base station is identified.

The confirmation unit may identify the base station receiving the specific message including information on at least one frequency band in which the signal disturbance has occurred to the specific base station.

Preferably, when the specific base station is identified, the control unit may change the frequency band used for packet transmission and reception by the two or more base stations to another frequency band free from signal disturbance.

Preferably, the control unit transmits a control message for changing the transmission frequency band to the different frequency band through the base station selected from the remaining base stations, and transmits the control message to the terminal for use in transmitting / The frequency band may be changed to the other frequency band in which the uplink packet of the terminal is received.

Preferably, the selected base station may be a base station having the best signal-to-noise ratio (SNR) with the terminal of the remaining base stations.

According to a second aspect of the present invention, there is provided a method of operating a network device, the method comprising: receiving a uplink packet of a terminal through two or more base stations; A confirming step of checking whether there is a specific base station in which signal disturbance has occurred, out of the two or more base stations; And an uplink processing step of using only the uplink packets received through the remaining base stations excluding the specific base station among the two or more base stations during the uplink packet processing of the terminal when the specific base station is confirmed.

Preferably, when the specific base station is identified, the base station may further include a frequency band changing step of changing the frequency band used by the at least two base stations for packet transmission and reception of the terminal to another frequency band without signal disturbance.

Preferably, the frequency band changing step may include transmitting to the terminal a control message for changing the transmission frequency band to the different frequency band through the base station selected from the remaining base stations, The frequency band used for transmission and reception can be changed to the other frequency band for receiving the uplink packet of the terminal.

According to the network device and the operation method of the network device of the present invention, the IoT base station frequency band changing method suitable for the IoT network, which can change the frequency band of the IoT base station in which the signal disturbance is generated, The effect of improving the quality of the service can be obtained.

FIG. 1 is an exemplary diagram illustrating a structure of an Internet (IoT) network to which the present invention is applied.
2 is a block diagram illustrating a configuration of a network device according to a preferred embodiment of the present invention.
3 is an exemplary diagram illustrating a situation in which a frequency band of an IoT base station in which a signal disturbance is generated is changed according to a method of changing the IoT base station frequency band proposed in the present invention.
4 is a flowchart illustrating an operation method of a network device according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows a network structure of Internet of Things (IOT) to which the present invention is applied.

1, the Internet architecture (IoT) network structure to which the present invention is applied is configured to check the data of the object Internet terminals (e.g., terminals 1, 2, ..., X) A network device (00, IoT appserver) for connecting the object Internet terminal and the customer terminal (IoT app) via a wired / wireless network, an object Internet (Eg, base stations 1, 2,... L) serving as a gateway for performing packet transmission / reception between the terminal and the network device 100.

An uplink / downlink packet transmission process of the Internet (IoT) service provided in the IoT network structure will be briefly described as follows.

First, when the object Internet terminal transmits an uplink packet to a network device, the object Internet terminal transmits an uplink packet in a broadcast manner, and the plurality of IoT base stations receive the packet and transmit the uplink packet to the network device .

In addition, when the network device transmits the downlink packet to the object Internet terminal, the network device transmits the downlink packet to one IoT base station selected by the object Internet terminal, and the one IoT base station receiving the downlink packet transmits the downlink packet to the object Internet terminal .

The quality of the Internet (IoT) service provided in the IoT network structure is greatly affected by the reception success rate of uplink / downlink packets transmitted / received between three nodes of the Internet / IoT base station / network device.

In the IoT network, since the frequency of the license-exempt band is used, signal disturbance due to malicious attack by a third party or interference of other networks is likely to occur. Such a signal disturbance is caused by the uplink / downlink (IoT) service due to a sudden drop in the packet reception success rate.

Therefore, in the IoT network, a method for avoiding signal disturbance is needed.

On the other hand, in the IoT network, the uplink / downlink frequency band is defined to be used equally, and a high degree of computation is not introduced to the IoT base station only serving as a gateway.

Thus, in the IoT network, even if a signal disturbance occurs in the IoT base station side, it is impossible for the IoT base station itself to change the frequency band.

That is, in the current Internet (IoT) technology, there is not proposed a separate method of changing the frequency band of the IoT base station in order to avoid signal disturbance when signal disturbance occurs in the IoT base station side.

On the other hand, the IoT network defines signaling for changing the transmission frequency band of the object Internet terminal based on the network.

Accordingly, in the present invention, when signal disturbance is generated in the IoT base station side by using signaling for changing the transmission frequency band of the object Internet terminal, the IoT base station frequency band change suitable for the IoT network I would like to propose a plan.

More specifically, the present invention proposes a network apparatus for realizing a method of changing the IoT base station frequency band for avoiding signal disturbance.

Hereinafter, a network device according to a preferred embodiment of the present invention will be described in detail with reference to FIG.

The network device 100 of the present invention includes a packet receiving unit 110 for receiving an uplink packet of a terminal through two or more base stations and an acknowledgment unit 110 for checking whether there is a specific base station in which a signal disturbance has occurred And a controller 130 using only the uplink packets received through the remaining base stations of the two or more base stations except for the specific base station when the specific base station is identified.

Here, the terminal may be a matter Internet terminal (e.g., terminals 1, 2, ..., X) mentioned in the description of FIG.

Hereinafter, for convenience of explanation, one Internet terminal, that is, one of terminals 1, 2, ..., X, for example, one terminal will be described.

Meanwhile, the present invention proposes a method for changing the IoT base station frequency band suitable for the IoT network, and therefore, the base station referred to in the foregoing description and the following description can be regarded as the IoT base station as the gateway.

The packet receiving unit 110 receives the uplink packet of the terminal 1 through two or more base stations.

As described above, in the IoT network, when the object Internet terminal transmits the uplink packet to the network device, the object Internet terminal transmits the uplink packet in a broadcast manner, and the plurality of IoT base stations receive the uplink packet To the network device.

Accordingly, when the terminal 1, which is the Internet terminal, transmits a uplink packet in a broadcast manner, a plurality of IoT base stations, which receive uplink packets of the terminal 1 in the vicinity of the terminal 1, To the device (100).

Accordingly, the network apparatus 100, that is, the packet receiving unit 110, receives the uplink packet of the terminal 1 through two or more base stations, that is, a plurality of IoT base stations.

Hereinafter, as the two or more base stations for receiving the uplink packet of the terminal 1 and transmitting the uplink packet to the network device 100, the base stations 1, 2, and 3 shown in FIG. 1 will be described below.

That is, in the following description, when the terminal 1 transmits the uplink packet in a broadcast manner through one channel (frequency band F1) of the frequency of the license-exempt band used for the Internet service (IoT) A plurality of IoT base stations, that is, base stations 1, 2, and 3, which receive the uplink packet of the terminal 1 through the frequency band F1 transmit the uplink packet of the terminal 1 to the network device 100 will be described.

The confirmation unit 120 checks whether there is a specific base station in which signal disturbance has occurred among the two or more base stations, for example, base stations 1, 2, and 3 described above.

A process for checking whether there is a specific base station in which signal disturbance has occurred will be described in detail as follows.

The IoT base station can detect the occurrence of this signal disturbance when a signal disturbance due to malicious attack by a third party or interference from other networks occurs in the vicinity.

For example, the IoT base station measures the frequency-to-noise ratio (SNR) of each frequency band (F1, F2, ...) ), And if there is a frequency band in which the SNR deteriorates rapidly or falls below the threshold, it can be detected that signal disturbance has occurred in the corresponding frequency band.

Of course, the manner in which the IoT base station detects the occurrence of signal disturbances may be varied.

The IoT base station detecting the occurrence of a signal disturbance may transmit a specific message to the network device 100, including information on at least one frequency band in which the signal disturbance has occurred.

Here, the specific message is preferably a PUSH DATA message according to a protocol between the IoT base station and the network device 100.

Here, the information on at least one frequency band in which a signal disturbance has occurred refers to identification information (e.g., center frequency) of a frequency band (channel) in which a signal disturbance occurs. If frequency bands (channels) (Eg, center frequency) arrangement of a plurality of frequency bands (channels) in which signal disturbance has occurred.

The protocol between the IoT base station and the network device 100 is a gateway message protocol (GWMP). In the current Internet (IoT) technology, the IoT base station does not define a portion for detecting a signal disturbance to be notified to the network device 100.

Accordingly, in the present invention, the portion of the IoT base station, which is not defined in the current Internet (IoT) technology, notifies the network device 100 of the signal disturbance to a protocol between the IoT base station and the network device 100, that is, PUSH DATA message.

That is, according to the present invention, the IoT base station detecting the occurrence of a signal disturbance transmits a GWMP standard PUSH DATA message including information on at least one frequency band in which signal disturbance has occurred to the network device 100, To the network device (100).

Accordingly, the network device 100, that is, the acknowledgment unit 120 transmits a specific message including information on at least one frequency band in which signal disturbance has occurred, that is, GWMP standard, among the two or more base stations, And confirms the base station receiving the PUSH DATA message according to the specific base station.

Hereinafter, for convenience of explanation, the base station 3 detects a signal disturbance in the frequency band F1 and transmits a PUSH DATA message including information on the frequency band F1 (center frequency of the frequency band F1) to the network device 100 I will assume that.

In this case, the confirmation unit 120 can confirm the base station 3, from which the PUSH DATA message including the information (single identification information) about the frequency band F1 in which the signal disturbance has occurred, Further, the frequency band F1 in which the signal disturbance occurs can be confirmed from the PUSH DATA message.

When a specific base station such as the base station 3 is identified among the base stations 1, 2 and 3, the controller 130 receives the base station 1, the base station 2, and the base station 3 excluding the base station 3, Only the uplink packet is used.

That is, when the uplink packet of the object Internet terminal is received through the plurality of IoT base stations, the network device 100 maps / holds the uplink packet-based data to the corresponding object internet terminal, (IoT) using uplink packets received through a plurality of IoT base stations, such as selecting an IoT base station for downlink packet transmission based on an uplink packet, And performs uplink packet processing for the service.

At this time, when the uplink packet of the terminal 1 is received through the base stations 1, 2 and 3, the controller 130 performs a process of uplink packet processing of the terminal 1 for the Internet service (IoT) In this case, the uplink packet received through the base station 3 where the signal disturbance occurs in the base stations 1, 2, and 3 is dropped and only the uplink packets received through the remaining base stations 1 and 2 are used.

This is because the reliability of the uplink packet of the terminal 1 received through the base station 3 in which the signal disturbance occurs is lowered so that the downlink reliability packet is not used and the quality of the Internet IoT service is prevented from deteriorating It is for this reason.

Also, in the IoT network, even if the uplink packet of the terminal 1 received through the base station 3 in which the signal disturbance has occurred is discarded without using the uplink packet, the same uplink packet of the terminal 1 is received through the other base stations 1 and 2, Internet (IoT) service can be provided normally without problem.

Furthermore, the network device 100 of the present invention changes the frequency band of the IoT base station in order to avoid signal disturbance, which is a root cause that the reliability of the uplink packet of the terminal 1 received through the base station 3 is lowered.

More specifically, when the specific base station, that is, the base station 3, is identified, the control unit 130 searches the frequency bands used for transmitting and receiving packets of the terminal 1 from two or more base stations, that is, Band.

That is, since the frequency band used for transmitting and receiving packets of the terminal 1 in the base stations 1, 2, and 3 will be the frequency band F1, the control unit 130 controls the frequency bands Band to a different frequency band without signal disturbance in the current frequency band F1.

As mentioned above, in the IoT network, it is impossible for the IoT base station itself to change the frequency band.

On the other hand, the IoT network defines signaling for changing the transmission frequency band of the object Internet terminal based on the network.

Therefore, in the proposed method of changing the IoT base station frequency band, the present invention intends to change the IoT base station frequency band by using signaling for changing the transmission frequency band of the object Internet terminal.

According to a more specific embodiment, in the above-described example, the control unit 130 determines whether the transmission frequency band is different from the transmission frequency band through the base stations 1 and 2 selected from the remaining base stations 1 and 2 except for the base station 3, And transmits a control message for changing the frequency band to the terminal 1.

In this case, the control message means a signaling (Modification Channel Req / Resp) for changing the transmission frequency band of the object Internet terminal based on the network in the IoT network.

In addition, the selected base station of the remaining base stations 1 and 2 may be the base station having the best signal-to-noise ratio (SNR) with the terminal 1 of the remaining base stations 1 and 2.

As described above, in performing the uplink packet processing of the terminal 1 for the Internet service (IoT) as described above, the controller 130 controls the base station 1, the base station 2, 3 using only the uplink packets received via the remaining base stations 1,

Accordingly, in the process of selecting the IoT base station for downlink packet transmission on the basis of the uplink packet of the terminal 1, the control unit 130 selects the terminal 1 (SNR) with the best channel state.

Hereinafter, it is assumed that the base station 2 is selected for convenience of explanation.

If the IoT base station for transmitting the downlink packet of the terminal 1 is selected as the base station 2, a downlink packet for the terminal 1 generated in the network device 100 is transmitted to the terminal 1 through the base station 2 until the base station selection is changed do.

In this case, the control unit 130 transmits a control message for changing the transmission frequency band used by the terminal 1 from the current frequency band F1 to another frequency band (for example, the frequency band F2) through the selected base station 2 to the terminal 1 .

In this case, since the uplink / downlink frequency band is defined to be used equally in the IoT network, when the network device 100 transmits a control message, i.e., a downlink packet to the base station 2, the base station 2 transmits downlink packets (Control message) to the terminal 1, and since the signal disturbance is not detected in the frequency band F1 in the base station 2, the downlink packet (control message) will be successfully received at the terminal 1.

Accordingly, the terminal 1 changes the transmission frequency band from the current frequency band F1 to another frequency band (for example, the frequency band F2) in accordance with the control message received from the network device 100, And transmit it in a broadcast manner through the changed frequency band F2.

In this case, since the signal disturbance is generated for each frequency band, even when the signal disturbance of the frequency band F1 occurs in the base station 3, the uplink packet of the terminal 1 is received through the frequency band F2 without signal disturbance around the terminal 1 The base stations 1, 2, and 3 will transmit the uplink packet of the terminal 1 to the network device 100.

In the process of selecting the IoT base station for downlink packet transmission based on the uplink packet of the terminal 1, the network device 100 determines the channel state (SNR) with respect to the base station 1, One of the base stations having the best F2 channel state (SNR) will be selected, and the downlink packet of the terminal 1 will be transmitted to the selected base station.

At this time, since the uplink / downlink frequency band is defined to be equally used in the IoT network, the base station (one of the base stations 1, 2, and 3) receiving the downlink packet of the selection and terminal 1 also transmits downlink And transmits the packet to the terminal 1.

As described above, in the IoT base station frequency band changing method of the present invention realized by the network device 100, when the IoT base station in which the signal disturbance is generated notifies the network of the disturbance, By changing the transmission frequency band, the frequency band of the IoT base station is changed naturally according to the characteristics of using the same uplink / downlink frequency band in the IoT network.

As a result, the IoT base station frequency band changing method of the present invention realizes network-based IoT base station frequency band change by utilizing signaling for changing the transmission frequency band of the object Internet terminal based on the network.

As described above, according to the present invention, it is possible to improve the quality of the Internet service (IoT) by realizing the IoT base station frequency band changing method suitable for the IoT network, which can change the frequency band of the IoT base station in which the signal disturbance is generated Effect.

Particularly, among the Internet (IoT) technologies, a method for changing the IoT base station frequency band of the present invention is applied to the IoT technology (LoRa: Long Range) specialized in small data transmission supporting low-rate transmission (<1 kbps) It is expected that the quality of IoT service will be improved by the change of the network-based IoT base station frequency band.

Meanwhile, in the present invention, it is possible to realize the change of the object Internet terminal frequency band even when a signal disturbance due to a malicious attack by a third party or interference of another network occurs on the object Internet terminal side.

For example, the object Internet terminal monitors the channel state (SNR) of the currently used transmission frequency band, and if the channel state (SNR) deteriorates rapidly or falls below a threshold value, a signal disturbance occurs in the current transmission frequency band Can be detected.

Of course, the manner in which the object Internet terminal detects the occurrence of signal disturbance may be various.

In the current Internet (IoT) technology, since the object Internet terminal can change the frequency band by itself, when the object Internet terminal detects the occurrence of signal disturbance in the current transmission frequency band, the transmission frequency band is allocated to the Internet service It is only necessary to transmit the uplink packet in a broadcast manner through the changed transmission frequency band after changing to the other frequency band of the frequency of the license-exempted band to be used.

Hereinafter, with reference to FIG. 3, a case will be described in which the frequency band of the IoT base station in which the signal disturbance is generated is changed according to the proposed method of changing the IoT base station frequency band proposed in the present invention.

Further, for convenience of explanation, when the terminal 1 transmits an uplink packet in a broadcast manner through one channel (frequency band F1) of the frequency of the license-exempt band used for the Internet service (IoT) The base station 1, 2, 3 which receives the uplink packet of the terminal 1 through the frequency band F1 in the vicinity of the base station 1 transmits the uplink packet of the terminal 1 to the network device 100. FIG.

That is, the terminal 1 transmits an uplink packet in a broadcast manner via the frequency band F1 (S10). The base station 1, which receives the uplink packet of the terminal 1 through the frequency band F1 in the vicinity of the terminal 1 , And 3 transmits the uplink packet of the terminal 1 to the network device 100.

At this time, if the base station 3 detects the occurrence of a signal disturbance in the frequency band F1 (S20), the PUSH DATA message of the GWMP standard including the information on the frequency band F1 in which the signal disturbance occurs (frequency of the frequency band F1) (S30), thereby informing the network device 100 of the signal disturbance.

Accordingly, the network device 100 confirms the base station 3 in which the signal disturbance has occurred among the base stations 1, 2, and 3 that transmitted the uplink packet of the terminal 1 based on the PUSH DATA message, (S40).

The network device 100 receives the uplink packet transmitted by the terminal 1 in the frequency band F1 (S50) and transmits the uplink packet of the terminal 1 to the network device 100 Only the uplink packets received through the other base stations 1 and 2 except for the base station 3 are used (S60).

That is, when the uplink packet of the object Internet terminal is received through the plurality of IoT base stations, the network device 100 maps / holds the uplink packet-based data to the corresponding object internet terminal, (IoT) using uplink packets received through a plurality of IoT base stations, such as selecting an IoT base station for downlink packet transmission based on an uplink packet, And performs uplink packet processing for the service.

At this time, when the uplink packet of the terminal 1 is received through the base stations 1, 2, and 3, the network device 100 performs a process of uplink packet processing of the terminal 1 for the Internet service (IoT) The uplink packet received through the base station 3 where the signal disturbance occurs in the base stations 1, 2 and 3 is dropped and only the uplink packets received through the remaining base stations 1 and 2 are used.

In this case, in the process of selecting the IoT base station for downlink packet transmission based on the uplink packet of the terminal 1, the network device 100 selects one of the remaining base stations 1 and 2 And selects a base station having the best channel state (SNR) with the terminal 1 (S70). Hereinafter, it is assumed that the base station 2 is selected for convenience of explanation.

When the IoT base station for transmitting the downlink packet of the terminal 1 is selected as the base station 2, the network device 100 transmits the transmission frequency band used by the terminal 1 through the selected base station 2 to the other frequency band F1 To a frequency band (e.g., frequency band F2) to the terminal 1 (S80).

Since the IoT network defines the uplink / downlink frequency band to be used equally, when the network device 100 transmits a control message, i.e., a downlink packet, to the base station 2 (S80) The downlink packet (control message) is transmitted to the terminal 1, and since the signal disturbance is not detected in the frequency band F1 in the base station 2, the downlink packet (control message) will be successfully received at the terminal 1 (S90 ).

Accordingly, the terminal 1 changes the transmission frequency band from the current frequency band F1 to another frequency band (for example, the frequency band F2) in accordance with the channel index in the control message (Modification Channel Req) received from the network device 100 (S100), and transmits a response message (Modification Channel Resp) for a control message generated thereafter in a broadcast manner through a frequency band F2 in which the uplink packet is changed (S110).

In this case, since the signal disturbance is generated for each frequency band, even when the signal disturbance of the frequency band F1 occurs in the base station 3, the uplink packet of the terminal 1 is received through the frequency band F2 without signal disturbance around the terminal 1 The base stations 1, 2, and 3 will transmit the uplink packet of the terminal 1 to the network device 100.

Hereinafter, a method of operating a network device according to a preferred embodiment of the present invention will be described with reference to FIG.

3, for convenience of explanation, the terminal 1 is upgraded in a broadcast manner through one channel (frequency band F1) of the frequencies of the license-exempt band used for the Internet service (IoT) When the link packet is transmitted, it is assumed that the base stations 1, 2, and 3, which are to receive the uplink packet of the terminal 1 through the frequency band F1 in the vicinity of the terminal 1, transmit the uplink packet of the terminal 1 to the network device 100 I will explain it.

That is, the operation method of the network device 100 according to the present invention will receive the uplink packet transmitted from the terminal 1 in the frequency band F1 through the base stations 1, 2, and 3 (S200).

The operation method of the network device 100 according to the present invention checks whether there is a specific base station in which signal disturbance has occurred among the base stations 1, 2, and 3 (S210).

That is, the operation method of the network device 100 according to the present invention is characterized in that a specific message including information on at least one frequency band in which signal disturbance has occurred, that is, a PUSH DATA message according to the GWMP standard, If there is a base station to be received (S210 Yes), the base station can be confirmed as a specific base station.

Hereinafter, for convenience of explanation, the base station 3 detects a signal disturbance in the frequency band F1 and transmits a PUSH DATA message including information on the frequency band F1 (center frequency of the frequency band F1) to the network device 100 I will assume that.

In this case, the operating method of the network device 100 according to the present invention is a method of operating the base station 1, 2, or 3, in which a PUSH DATA message including information (single identification information) 3 can be confirmed by the specific base station, and furthermore, the frequency band F1 in which the signal disturbance occurs can be confirmed from the PUSH DATA message (S220).

Thereafter, when the uplink packet transmitted by the terminal 1 through the frequency band F1 is received through the base stations 1, 2 and 3 (S230), the operation of the network device 100 according to the present invention is performed. Only the uplink packets received through the other base stations 1 and 2 except the base station 3 are used in uplink packet processing of the terminal 1 (S240).

That is, when the uplink packet of the object Internet terminal is received through the plurality of IoT base stations, the operation method of the network device 100 according to the present invention is a method of mapping / holding the uplink packet- The terminal checks the data of the object Internet terminal and controls the object Internet terminal, and selects the IoT base station for downlink packet transmission on the basis of the uplink packet. The uplink packets received through the plurality of IoT base stations And performs an overall process of uplink packet processing for the Internet (IoT) service.

At this time, when the uplink packet of the terminal 1 is received through the base stations 1, 2, and 3, the operation method of the network device 100 according to the present invention is the same as that of the uplink of the terminal 1 for the object Internet (IoT) In carrying out the overall process of the link packet processing, the uplink packet received through the base station 3 in which the signal disturbance occurs in the base stations 1, 2, and 3 is dropped and only the uplink packets received through the remaining base stations 1, To use.

This is because the reliability of the uplink packet of the terminal 1 received through the base station 3 in which the signal disturbance occurs is lowered so that the downlink reliability packet is not used and the quality of the Internet IoT service is prevented from deteriorating It is for this reason.

Also, in the IoT network, even if the uplink packet of the terminal 1 received through the base station 3 in which the signal disturbance has occurred is discarded without using the uplink packet, the same uplink packet of the terminal 1 is received through the other base stations 1 and 2, Internet (IoT) service can be provided normally without problem.

The operation method of the network device 100 according to the present invention is a method of operating the frequency band of the IoT base station in order to avoid signal disturbance which is a fundamental cause of lower reliability of the uplink packet of the terminal 1 received through the base station 3. [ .

More specifically, the operation method of the network device 100 according to the present invention is a method of operating the network device 100 in which, when a specific base station, that is, the base station 3 is identified, the frequency bands used for transmitting / To a different frequency band.

That is, since the frequency band used for transmitting and receiving packets of the terminal 1 in the base stations 1, 2, and 3 will be the frequency band F1, the operation method of the network device 100 according to the present invention is such that the base stations 1, To another frequency band in which no signal disturbance is present in the current frequency band F1.

According to a more specific embodiment, a method of operating the network device 100 according to the present invention is a method of operating the network device 100 according to the present invention, To the terminal 1, a control message for changing the transmission frequency band to another frequency band.

In this case, the control message means a signaling (Modification Channel Req / Resp) for changing the transmission frequency band of the object Internet terminal based on the network in the IoT network.

In addition, the base station selected among the remaining base stations 1 and 2 may be the base station having the best channel state (SNR) with the terminal 1 of the remaining base stations 1 and 2.

As described above, in the method of operating the network device 100 according to the present invention, in performing the uplink packet processing of the terminal 1 for the Internet service (IoT), the base station 1, The uplink packet received through the base station 3 in which the disturbance occurs is dropped and only the uplink packets received through the remaining base stations 1 and 2 are used.

Therefore, in the method of operating the network device 100 according to the present invention, in the process of selecting the IoT base station for downlink packet transmission based on the uplink packet of the terminal 1, And selects one of the remaining base stations 1 and 2 that has the best channel state (SNR) with the terminal 1 (S250). Hereinafter, it is assumed that the base station 2 is selected for convenience of explanation.

If the IoT base station for transmitting the downlink packet of the terminal 1 is selected as the base station 2, a downlink packet for the terminal 1 generated in the network device 100 is transmitted to the terminal 1 through the base station 2 until the base station selection is changed do.

In this case, the operation method of the network device 100 according to the present invention is a method in which the transmission frequency band used by the terminal 1 is switched from the current frequency band F1 to another frequency band (for example, the frequency band F2) through the selected base station 2 (Modification Channel Req) to the terminal 1 (S260).

In this case, since the uplink / downlink frequency band is defined to be used equally in the IoT network, when the network device 100 transmits a control message, i.e., a downlink packet to the base station 2, the base station 2 transmits downlink packets (Control message) to the terminal 1, and since the signal disturbance is not detected in the frequency band F1 in the base station 2, the downlink packet (control message) will be successfully received at the terminal 1.

Accordingly, the terminal 1 changes the transmission frequency band from the current frequency band F1 to another frequency band (e.g., the frequency band F2) according to the channel index in the control message received from the network device 100, It will transmit in a broadcast manner through the frequency band F2 in which the link packet is changed.

In this case, since the signal disturbance is generated for each frequency band, even when the signal disturbance in the frequency band F1 occurs in the base station 3, the uplink packet of the terminal 1 is received through the frequency band F2 without signal disturbance around the terminal 1 The base stations 1, 2, and 3 will transmit the uplink packet of the terminal 1 to the network device 100.

Therefore, the operation method of the network device 100 according to the present invention will receive the uplink packet transmitted from the terminal 1 in the frequency band F2 through the base stations 1, 2, and 3 (S270).

In the method of operating the network device 100 according to the present invention, in the process of selecting the IoT base station for downlink packet transmission based on the uplink packet of the terminal 1, (SNR), that is, the frequency band F2 channel state (SNR), and transmits the downlink packet of the terminal 1 to the selected base station (S280).

At this time, since the uplink / downlink frequency band is defined to be equally used in the IoT network, the base station (one of the base stations 1, 2, and 3) receiving the downlink packet of the selection and terminal 1 also transmits downlink And transmits the packet to the terminal 1.

As described above, in the IoT base station frequency band changing method of the present invention realized by the network device 100, when the IoT base station in which the signal disturbance is generated notifies the network of the disturbance, By changing the transmission frequency band, the frequency band of the IoT base station is changed naturally according to the characteristics of using the same uplink / downlink frequency band in the IoT network.

As described above, according to the operation method of the network device, by implementing the IoT base station frequency band changing method suitable for the IoT network, which can change the frequency band of the IoT base station in which the signal disturbance is generated, The effect of improving the quality is derived.

A method of operating a network device according to an embodiment of the present invention may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks, and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

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, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

According to the network device and the operation method of the network device of the present invention, it is proposed to change the frequency band of the IoT base station suitable for the IoT network, in which the frequency band of the IoT base station can be changed when the signal disturbance occurs on the IoT base station side, It is an invention that is industrially applicable because it is beyond the limit of the existing technology, and it is not only the use of the related technology, but also the possibility of commercialization or operation of the applied device is sufficient and practically possible.

100: Network device
110: packet receiving unit 120:
130:

Claims (8)

A packet receiving unit for receiving an uplink packet of a terminal through two or more base stations;
A confirmation unit for checking whether there is a specific base station in which signal disturbance has occurred among the two or more base stations; And
And a controller for using only the uplink packets received through the remaining base stations of the two or more base stations except for the specific base station when processing the uplink packet of the terminal when the specific base station is confirmed. The method according to claim 1,
The checking unit,
Wherein the base station receives a specific message including information on at least one frequency band in which signal disturbance has occurred, to the specific base station. The method according to claim 1,
Wherein,
When the specific base station is identified, the two or more base stations change the frequency band used for packet transmission and reception of the terminal to another frequency band free from signal disturbance. The method of claim 3,
Wherein,
Transmitting a control message for changing a transmission frequency band to the other frequency band through the base station selected from the remaining base stations,
Wherein the frequency band used for packet transmission and reception of the terminal by the two or more base stations is changed to the other frequency band for receiving the uplink packet of the terminal. 5. The method of claim 4,
The selected base station,
And a base station having the best signal to noise ratio (SNR) with the terminal among the remaining base stations. A packet receiving step of receiving an uplink packet of a terminal through two or more base stations;
A confirming step of checking whether there is a specific base station in which signal disturbance has occurred, out of the two or more base stations; And
And an uplink processing step of using only the uplink packets received through the remaining base stations of the two or more base stations except for the specific base station in the uplink packet processing of the terminal when the specific base station is confirmed Lt; / RTI &gt; The method according to claim 6,
Further comprising a frequency band changing step of changing, by the two or more base stations, the frequency band used for packet transmission and reception of the terminal to another frequency band without signal disturbance, when the specific base station is identified. Way. 8. The method of claim 7,
Wherein the frequency band changing step comprises:
Transmitting a control message for changing a transmission frequency band to the other frequency band through the base station selected from the remaining base stations,
Wherein the frequency band used for packet transmission and reception of the terminal by the two or more base stations is changed to the different frequency band for receiving the uplink packet of the terminal.

Images