KR102108167B1 - Channel monitoring method and apparatus in local area network - Google Patents

Abstract

One aspect of the present invention discloses a channel monitoring method in a local area network of a channel monitoring device. The method includes searching for at least one short-range communication channel currently used in the vicinity by searching for at least one neighboring access point (AP) through a first interface, for the searched at least one short-range communication channel. And monitoring a packet transmitted and received through the at least one peripheral access point using a second interface according to the scheduled time by scheduling the monitoring time, wherein the second interface is configured to detect the at least one short-range communication channel. It is an interface corresponding to a frequency band, and the first interface periodically searches for the at least one peripheral access point to update information on at least one short-range communication channel currently used in the vicinity.

Description

Channel monitoring method in local area network {CHANNEL MONITORING METHOD AND APPARATUS IN LOCAL AREA NETWORK}

The present invention relates to a channel monitoring method for a local area communication network, and more particularly, to a method for efficiently monitoring a plurality of reception channels using a small number of antennas.

Computers typically communicated with each other via a wired local area network ('LAN'). However, in accordance with the recent increased demand for mobile computers such as smartphones, laptop computers, personal portable terminals, etc., computers perform transmission via wireless media using wireless signals, infrared signals, etc. By doing so, wireless local area networks ('WLAN') have been developed to communicate with each other.

To promote interoperability of WLANs with each other and with wired LANs, the IEEE 802.11 standard was developed as an international standard for WLANs. In general, the IEEE 802.11 standard is designed to provide users with the same interface as the IEEE 802 wired LAN while allowing data to be transmitted through a wireless medium.

According to the IEEE 802.11 standard, a terminal is authenticated by an access point of a WLAN and associated with the access point before acquiring service from an access point (AP). During the authentication and association process, the terminal proceeds through three stages or states (ie, state 1, state 2, and state 3). In state 1, the terminal is unauthenticated and unassociated. In state 2, the terminal is authenticated but not associated. In state 3, the terminal is authenticated and associated. If the terminal has a connectivity problem such as difficulty in obtaining a service from an access point, it may be difficult to determine the cause of the continuity problem.

Accordingly, in order to maintain continuity of service, it is necessary to monitor packets exchanged between one or more terminals and an access point in a wireless local area network using a monitoring device disposed in a wireless local area network (WLAN).

1 is a block diagram showing an apparatus for monitoring packets between a conventional access point and a terminal.

Referring to FIG. 1, the packet monitoring device 130 monitors packets exchanged between the access point 120 and the terminal 110. At this time, in order to monitor all channels, the channel reception equipment must be proportional to the number of channels, and a large number of local area network interfaces are required for this, which naturally causes a burdensome price. Basically, the WLAN operates 13 channels in the 2.4 GHz band and 24 channels in the 5 GHz band (the number of available channels may vary by country). Therefore, in order to monitor the entire channel, the packet monitoring device 130 needs 37 interfaces for scanning, which makes the device very heavy and expensive. In the normal case, the channel used in the vicinity is limited, and the probability of using the entire channel is extremely low. However, since the packet is monitored according to the provision of the above interface, its effectiveness is considerably low.

An object according to an aspect of the present invention for solving the above-described problem is to provide a method and apparatus for simultaneously monitoring a multi-channel communication network in a short-range communication network that monitors packets exchanged while rotating a plurality of reception channels with a small number of antennas for a predetermined period of time. will be.

A channel monitoring method in a local area network of a channel monitoring apparatus according to an aspect of the present invention for achieving the above object is searched for at least one peripheral access point (AP) through a first interface and used in the current surroundings. Searching for at least one short-range communication channel, scheduling a monitoring time for the searched at least one short-range communication channel, and using a second interface to transmit / receive packets through the at least one peripheral access point according to the scheduled time And monitoring, wherein the second interface is an interface corresponding to the frequency band of the searched at least one short-range communication channel, and the first interface periodically searches for the at least one peripheral access point and is currently in the vicinity. Information on at least one short-range communication channel used may be updated.

The first interface and the second interface may include an antenna associated with a local area network.

The second interface monitors the first short-range communication channel (the first short-range communication channel is included in the searched at least one short-range communication channel) in a first section of a predefined monitoring period, and the second short-range communication. For a channel (a second short-range communication channel is included in the searched at least one short-range communication channel), monitoring may be performed in a second section subsequent to the first time of the predefined monitoring period.

When the first short-range communication channel is a channel in which many packets are generated above a reference value among the searched at least one short-range communication channel, the first short-range communication channel may be controlled to be exclusively monitored through a third interface.

When the difference between the packet transmission / reception amount of the first short-range communication channel and the packet transmission / reception amount of the second short-range communication channel is smaller than a reference value when searching for the peripheral access point, the second interface and the third interface are substantially equal. You can control to perform monitoring by dividing the time.

The monitoring time for each of the searched at least one short-range communication channel may be allocated in proportion to the amount of packets transmitted and received in the short-range communication channel within a preset search time.

An apparatus for monitoring a channel in a local area network according to an aspect of the present invention for achieving the above object includes a first interface for searching for at least one peripheral access point, and a second interface for monitoring packets in a first frequency band ( The first frequency band includes a frequency band associated with short-range communication) and a processor, wherein the processor searches the at least one peripheral access point (AP) through the first interface and is currently in the vicinity. Searching for at least one short-range communication channel used and scheduling the monitoring time for the searched at least one short-range communication channel to transmit and receive packets transmitted and received through the at least one peripheral access point according to the scheduled time. Control by monitoring, but the processor may control the first interface to periodically search for the peripheral access point and update information on at least one short-range communication channel currently used in the vicinity.

According to another aspect of the present invention for achieving the above object, the channel monitoring method in the local area network of the channel monitoring device, a first access point (AP: Access Point) around the channel monitoring device from the first terminal capable of short-range communication ) Monitoring the first packet provided, checking the reception time of the first packet and the MAC address of the first terminal (the MAC address of the first terminal is included in the first packet). The monitoring of the first packet may include searching for at least one short-range communication channel currently used in the vicinity by searching for at least one peripheral access point through the first interface included in the device (the at least one peripheral access) A point including the first access point), and a second interface to a packet transmitted and received through the searched at least one peripheral access point according to the scheduled time by scheduling a monitoring time for the searched at least one short-range communication channel. And monitoring, and the second interface may be an interface corresponding to the frequency band of the searched at least one short-range communication channel.

The first interface may periodically search for the at least one peripheral access point to update information on at least one short-range communication channel currently used in the vicinity.

The first packet includes a packet for requesting confirmation of work to a work place associated with the first access point, and checking the reception time of the first packet and the MAC address of the first terminal comprises: the first packet It may include the step of confirming whether the reception time of is included in the time zone related to work and comparing the MAC address of the first terminal with the MAC address of the pre-stored terminal to check the attendance.

The first packet includes a packet requesting confirmation of departure from a work place associated with the first access point, and checking the reception time of the first packet and the MAC address of the first terminal comprises: the first packet It may include the step of confirming whether the reception time of is included in the time zone associated with work and comparing the MAC address of the first terminal with the MAC address of the pre-stored terminal to check the work.

The channel monitoring method further includes monitoring at least one packet periodically transmitted and received from the first terminal to the first access point to determine whether the first terminal is actually present in a workplace associated with the first access point. can do.

The channel monitoring method may further include calculating an actual working time by subtracting a time that does not actually exist in the working place from the total working hours calculated based on the time of commence to the work place and the time of leaving work from the work place. Can be.

The first packet includes a packet for confirming the time and attendance of the work place associated with the first access point, and the method includes a time and attendance information based on a monitoring result of the first packet (the first server is the time and attendance) It is a server that aggregates information).

The time and attendance information provided to the server may include identification information of the first terminal, signal strength information of the first packet, and reception time information.

A channel monitoring apparatus in a local area network according to another embodiment of the present invention for achieving the above object, a first interface for searching for at least one peripheral access point, a second interface for monitoring packets in a first frequency band (above The first frequency band includes a frequency band associated with short-range communication) and a processor, wherein the processor is from a first terminal capable of short-range communication to a first access point (AP: Access Point) around the channel monitoring device. Monitor the provided first packet and control to check the reception time of the first packet and the MAC address of the first terminal (the MAC address of the first terminal is included in the first packet), and the first packet With regard to monitoring for, the processor searches for at least one peripheral access point (the at least one peripheral access point includes the first access point) through the first interface to use at least the current surroundings. Search for one local area communication channel and schedule monitoring time for the searched at least one local area communication channel to monitor packets transmitted and received through the searched at least one peripheral access point according to the scheduled time using a second interface By doing so, the first packet can be monitored.

The processor may control the first interface to periodically search for the at least one peripheral access point and update information on at least one short-range communication channel used in the current surroundings.

A system for monitoring a channel in a local area network according to another embodiment of the present invention for achieving the above object is provided from a first terminal capable of local area communication to a first access point (AP) around a channel monitoring device Monitoring device for monitoring the first packet to be monitored, and controlling to check the reception time of the first packet and the MAC address of the first terminal (the MAC address of the first terminal is included in the first packet) It may include a time and attendance management server for managing the time and attendance of the user associated with the first terminal based on the reception time information included in the first packet and the MAC address of the first terminal.

According to the method and apparatus for simultaneous monitoring of a multi-channel short-range communication network according to the present invention, there is an effect of lowering the unit cost of packet monitoring equipment, and also, since signals are received even without being individually paired with a client, multiple interfaces are utilized. It can be implemented with lower power than the conventional method, and has an effect of efficiently monitoring packets of a used channel with a small number of interfaces.

In addition, when this is applied to time and attendance management, it is possible to grasp in real time whether a real worker is at the workplace, thereby improving the efficiency of modern management.

1 is a block diagram showing an apparatus for monitoring packets between a conventional access point and a terminal,
Figure 2 is a block diagram schematically showing the configuration of a multi-channel simultaneous monitoring apparatus according to an embodiment of the present invention,
3 is a flowchart schematically showing a multi-channel simultaneous monitoring method according to an embodiment of the present invention,
4 is a conceptual diagram illustrating a method of covering a plurality of short-range communication channels,
5A is a conceptual diagram illustrating a dedicated mode of monitoring by dedicatedly monitoring packets of a specific channel using an auxiliary monitoring interface;
FIG. 5B is a conceptual diagram for explaining a split mode for dividing and monitoring multiple channels evenly;
6 is a view showing a system for performing time and attendance management of a workplace using a multi-channel simultaneous monitoring device according to another embodiment of the present invention;
FIG. 7 is a flow chart showing an operation method of a system for performing time and attendance management of a workplace using the multi-channel simultaneous monitoring device of FIG.
8 is a flowchart illustrating a time and attendance management method using a multi-channel simultaneous monitoring apparatus according to another embodiment of the present invention.

The present invention can be applied to various changes and can have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail.

However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from other components. For example, the first component may be referred to as a second component without departing from the scope of the present invention, and similarly, the second component may be referred to as a first component. The term and / or includes a combination of a plurality of related described items or any one of a plurality of related described items.

When an element is said to be "connected" or "connected" to another component, it is understood that other components may be directly connected to or connected to the other component, but there may be other components in between. It should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that no other component exists in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, terms such as “include” or “have” are intended to indicate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, one or more other features. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms such as those defined in a commonly used dictionary should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate the overall understanding in describing the present invention, the same reference numerals are used for the same components in the drawings, and duplicate descriptions for the same components are omitted.

2 is a block diagram schematically showing the configuration of a multi-channel simultaneous monitoring apparatus according to an embodiment of the present invention. As shown in FIG. 2, the monitoring device according to an embodiment of the present invention includes a control unit 210, a peripheral AP scan interface 220, a 2.4 GHz scan interface 1 (230-1), and a 2.4 GHz scan interface. 2 (230-2), 5GHz scan interface 1 (240-1), may include 5GHz scan interface 2 (240-2).

Referring to FIG. 2, the control unit 210 includes a peripheral AP scan interface 220, a 2.4 GHz scan interface 1 (230-1), a 2.4 GHz scan interface 2 (230-2), and a 5 GHz scan interface 1 ( 240-1), overall control for 5 GHz scan interface 2 (240-2) is performed. This may be implemented as a CPU (Central Processing Unit) such as a microprocessor, and instructions for driving it may be stored in a separate memory (not shown). The control unit 210 may check the reception time, signal strength and IP or MAC address of the terminal associated with the packet and store it in the memory. In addition, scan order and time of each interface can be scheduled.

The peripheral AP scan interface 220 searches for an AP in the vicinity and searches for a short-range communication channel currently used in the vicinity. According to an embodiment of the present invention, the short-range communication method may include Wi-Fi, Bluetooth, Zigbee, Radio-Frequency Identification (RFID), Near Field Communication (NFC), and the like. . However, it is not necessarily limited to this. The controller 210 first operates the peripheral AP scan interface 220 to search for a short-range communication channel currently used in the vicinity. The searched short-range communication channel information is provided to the control unit 210, and the control unit 210 schedules the packet transmission and reception to and from an appropriate frequency band interface with the corresponding information.

According to an embodiment of the present invention, the interface may be implemented as an antenna, the antenna may be connected to a device in advance, and may be detachably connected and operated using a connection means such as USB.

The 2.4 GHz scan interface 1 (230-1) represents an interface for scanning the 2.4 GHz frequency band. If there is a communication channel of the first frequency band (for example, 2.4 GHz) among the channels searched through the peripheral AP scan interface 220, the interface between the AP and the terminal is operated by basically operating the 2.4 GHz scan interface 1 230-1. Allows you to monitor packets being dropped. At this time, if there is more than one channel currently operating in the vicinity, the monitoring is performed by dividing it with the interface 2 (230-2) for 2.4 GHz scan. However, if three or more channels of the first frequency band are being used, the 2.4 GHz scan interface 1 (230-1) and the 2.4 GHz scan interface 2 (230-2) are appropriately distributed and monitored according to usage. Proper distribution here includes allocating time. Content related to scheduling over time will be described in more detail in FIGS. 5A and 5B below.

5 GHz scan interface 1 (240-1) represents an interface that scans the 5 GHz frequency band. If there is a communication channel in the second frequency band (for example, 5 GHz) among the channels searched through the peripheral AP scan interface 220, the packet exchanged between the AP and the terminal by basically operating the 5 GHz scan interface 1 240-1 is operated. So that it can be monitored. At this time, if there is more than one short-range communication channel related to the second frequency currently operating in the vicinity, monitoring is performed by dividing it with interface 2 (240-2) for 5 GHz scan. That is, the first channel is to be monitored by interface 1 (240-1) for 5 GHz scan, and the second channel is monitored by interface 2 (240-2) for 5 GHz scan.

However, if three or more channels of the second frequency band are in use, this is also the same as the channel allocation method of the first frequency band, and the interface 1 (240-1) and the 5 GHz scan for 5 GHz scan according to the channel usage and / or the amount of packet transmission and reception. For proper distribution, monitor interface 2 (240-2).

The 2.4 GHz scan interface 1 (230-1) and the 5 GHz scan interface 1 (240-1) mainly monitor packets in the channel of the corresponding frequency band, but if there is a large number of channels, it is difficult to handle with one interface. It is controlled to operate in a manner in which the 2.4 GHz scan interface 2 (230-2) and the 5 GHz scan interface 2 (240-2) are input as auxiliary roles.

In an embodiment of the present invention, 2.4 GHz scan interface 1 (230-1), 2.4 GHz scan interface 2 (230-2), 5 GHz scan interface 1 (240-1), 5 GHz scan interface 2 (240 -2), but this is because the current WLAN standard is implemented using 2.4GHz and 5GHz, and it conforms to the corresponding standard, and is used for 2.4GHz scan interface 1 (230-1) and 2.4GHz scan interface 2 ( 230-2) is a main scan interface and a secondary scan interface in the first frequency band other than 2.4 GHz, and 5 GHz scan interface 1 (240-1) and 5 GHz scan interface 2 (240-2) are not 5 GHz second It will be apparent to those skilled in the art that the frequency band can operate as a main scan interface and an auxiliary scan interface.

According to another embodiment of the present invention, the monitoring-related components may be mounted in an access point to implement a role of an access point and a packet monitoring function as a single device. That is, the access point and the packet monitoring device may be implemented as one device by coding the functions of the control unit 210 to the CPU of the access point and adding interfaces.

3 is a flowchart schematically illustrating a multi-channel simultaneous monitoring method according to an embodiment of the present invention.

Referring to FIG. 3, the device first searches for a currently used channel in the vicinity using an interface for scanning the surrounding AP (S310). At this time, it is not necessary to be paired with the access point. That is, it is not necessary to be paired with one specific access point, and even when paired with another access point, the entire channel can be monitored with a small number of interfaces.

In particular, it is preferable that the device monitors only the channels used in the corresponding space (for example, a communication range of an interface for surrounding AP scanning) without searching all channels. As a method of classifying channels used in a corresponding space, it is good to search for a near-field communication (eg, Wi-Fi) access point to identify a channel being used there. That is, monitoring is performed only on the use channel. This relieves the burden of searching the entire channel and avoids the heaviness of the equipment coming from the search burden. Therefore, low power design is possible and production of a low cost structure is also possible.

Then, the device operates the interface corresponding to the frequency band of the short-range communication channel currently being used to monitor the transmitted and received packets (S320). That is, when only the 2.4GHz band is used, 5GHz is standby and only the 2.4GHz band interface can be operated. In addition, when two or more communication channels are being used in a specific frequency band, monitoring is performed by properly distributing the interface for the auxiliary scan.

The device periodically searches for a neighboring use channel using an interface for neighboring AP scans, and updates the list for the use channel (S330). Then, returning to step S320, the packet is monitored by using the interface of the frequency band corresponding to the currently used channel based on the updated list.

Regarding the periodic list update, in order to see similar effects to the majority using a small number of interfaces, it is preferable to periodically use the interface for peripheral AP scans. Therefore, it is desirable to search for a neighboring use channel according to a predetermined period, but if the amount of packets in the search result is significant, the period is shortened to search. That is, it is possible to determine a plurality of reference values, to determine the section according to the packet amount, and to change the period according to the section. When the packet amount is 100 packets per second, it is possible to consider setting a variable search period in which the search period is searched in 30 seconds, and when the searched packet amount falls to 50 packets per second, the search period is increased in increments of 1 minute. Then, the peripheral AP is periodically checked according to the set search period using the interface for scanning the peripheral AP to update the list of nearby use channels based on the search result.

4 is a conceptual diagram illustrating a method of covering a plurality of short-range communication channels.

Referring to FIG. 4, the monitoring device 410 according to an embodiment of the present invention searches for a channel currently being used in conjunction with the channel search interface 412 (which may be referred to as an interface for surrounding AP scan). In the implementation of FIG. 4, two access points 420-1 (AP 1, 420-2: AP-2) may be discovered around the monitoring device 410, and corresponding APs 420-1 and 420-2 ), It can be seen that two channels (CH 2 and CH 150) are used, each using one channel.

Accordingly, the monitoring device 410 may control to perform monitoring using the interface of the first frequency band for the channel 2 and monitoring using the interface of the second frequency band for the channel 150. Accordingly, packets exchanged through channel 2 between the terminals 430-1, 430-2, and 430-3 and the access point 1 420-1 may be monitored through the interface 1 (not shown), and the terminal 440 Packets exchanged through channel 150 between -1, 440-2) and access point 2 (420-2) may be monitored through interface 2 (not shown).

Additionally, according to an embodiment of the present invention, the monitoring device is not authorized based on various information related to the monitored packet (eg, packet transmission / reception time, packet source / destination IP or address, traffic amount, signal strength, etc.). Undetected devices can be detected. Then, a function of blocking the use of the corresponding device may be performed. Alternatively, it may be confirmed whether a device using short-range communication is staying in a specific place (possible to calculate based on the strength of APs and signals), and this may be used to calculate the actual staying time of a specific place.

FIG. 5A is a conceptual diagram illustrating a dedicated mode for monitoring by dedicatedly monitoring packets of a specific channel using an auxiliary monitoring interface.

Referring to Figure 5a, the device operates to minimize the unreceived signal by scheduling the time associated with the signal reception. That is, the reception shadow is minimized. If you want to monitor the entire channel with a small number of short-range communication interfaces, you may encounter a situation where you have to scan by dividing the time. At this time, the moment you scan another channel, a shadow occurs on the corresponding channel. For example, while scanning channel 2, a situation in which packets originating from other channels cannot be received may occur. To minimize this, the device can use a dedicated mode.

According to an embodiment of the present invention, the device may have two or more interfaces 512-1 and 512-2 for one frequency band, one main interface 512-1 and one auxiliary interface ( 512-2). Of course, it is possible to have more than three interfaces, but this is expensive and costly in terms of equipment structure. In a situation in which two interfaces 512-1 and 512-2 are provided for one band, the device checks the amount of packets received for each channel, and the auxiliary interface 512-2 for the channel generating the most packets. ) Can be dedicated to scan.

According to the embodiment of FIG. 5A, channels 2, 5, and 10 are currently used in the space monitored by the monitoring device, and among them, channel 10 is the most used. In this case, assuming that channel 10 is significantly more used than channels 2 and 5, the device may allow the auxiliary monitoring interface 512-2 to receive 100% of the corresponding channel for channel 10. The determination of the dedicated mode is that the usage of the channel with the most usage (for example, channel 10) is greater than the sum of the usage of the remaining channels, or the usage of the channel is compared with an absolute preset reference value to set an amount greater than the reference value. You can decide to use dedicated mode when using it. At this time, the main interface 512-1, which is not dedicated to a specific channel, can monitor a plurality of channels by dividing the time. Regarding the division of time, a method of 1: 1 ratio, a method of varying the section ratio within a specific period in proportion to the amount of packets, and the like can be considered. In the embodiment of FIG. 5A, the device performs monitoring by allocating channels in a 1: 1 ratio. Therefore, the channels are alternately monitored at 0.5 second intervals for the 2nd and 10th channels.

5B is a conceptual diagram for explaining a split mode for dividing and monitoring multiple channels evenly.

Referring to FIG. 5B, the apparatus checks the amount of packets received for each channel, and when the difference in the amount of packets generated is not greater than a reference value, the main interface 522-1 and the auxiliary interface 522-2 are channeled evenly. It can be controlled to scan by dividing. For example, assuming that the reception channel has four channels 2, 5, 10, and 13, the main interface 522-1 and the auxiliary interface 522-2 have an equal number of channels, that is, , 2 channels can be allocated and monitored. This can be called split mode. Accordingly, the main interface 522-1 may be assigned to channels 2 and 5, and the auxiliary interface 522-2 may be assigned to channels 10 and 13 to monitor each. At this time, monitoring for a plurality of channels in one channel also depends on time division. Therefore, channels 2 and 5 are alternately periodically monitored by the main interface 522-1. At this time, the shift period may be set to 1: 1, or may be set in proportion to the packet amount and / or the number of packets.

The selection of the dedicated mode and the divided mode may be determined by periodically evaluating the amount of packets and / or the number of packets received.

6 is a view showing a system for performing time and attendance management of a workplace using a multi-channel simultaneous monitoring device according to another embodiment of the present invention. As shown in FIG. 6, the T & A system according to an embodiment of the present invention may include a terminal 610, an access point 620 (AP), a monitoring device 630, and a T & A server 640. .

Referring to FIG. 6, the terminal 610 is wirelessly connected to the access point 620 to use short-range communication resources. The terminal 610 may be implemented as a terminal such as a smart phone or a laptop, as well as any equipment having a short-range communication function.

The access point 620 exchanges packets with the terminal 610 through at least one of the preset channels.

The monitoring device 630 monitors packets transmitted and received between the access point 620 and the terminal 610 in real time through the method described in FIGS. 2 to 6. In addition, as described above, the monitoring device 630 may be implemented as an access point 620 and one device in some cases. The monitoring device 630 receives a short-range communication signal (for example, a Wi-Fi signal), signal strength information, reception time information, source / destination IP and MAC address, traffic amount, packet type, AP identification information, and terminal identification information. Can grasp According to an embodiment of the present invention, the monitoring device 630 transmits at least one of signal strength information of a packet to be exchanged, MAC address information of a related terminal, and reception time information as an element related to time and attendance management.

The monitoring device 630 may determine the location of the terminal 610 by the distance relationship between the access points 620 and the signal strength of packets transmitted and received in real time. Accordingly, whether it is present in a specific area (for example, a work place) or outside a specific area can be determined for each time zone using packet reception time information.

The server 640 may determine whether or not time and attendance (commuting, leaving work, working overtime, etc.) and the type of work (work within a work place, work outside a work place) based on information received from the monitoring device 630.

7 is a flowchart illustrating an operation method of a system for performing time and attendance management of a workplace using the multi-channel simultaneous monitoring device of FIG. 6.

Referring to FIG. 7, the terminal 710 activates short-range communication, and when it comes within the communication range of the access point 720, generates a short-range wireless communication signal (Wi-Fi signal) (S710). In some cases, a short-range wireless communication signal may be generated at the moment of reporting an action related to work, work, and / or night work through an application (APP) or web page related to time and attendance management. When the signal is generated as described above, the access point 720 receives the signal generated from the terminal 710 (S712). At this time, the monitoring device 730 operating in conjunction with the access point 720 monitors the packets exchanged between the terminal 710 and the access point 720 (S714), from which the signal strength information, reception time information, Information such as source / destination IP and MAC address, traffic amount, packet type, AP identification information, and terminal identification information is acquired (S716). Then, information related to time and attendance is checked (S718).

Actions related to time and attendance may include work, presence in the work area, work, and overtime.

In the case of commuting, the MAC address of the terminal 710 that transmitted the packet is compared with the MAC address of the pre-registered personal terminal to confirm that it is the registered user's, and a specific location is based on the relationship of the access point and signal strength information It is judged whether or not it actually arrives (for example, a work place) to determine whether to go to work. In more detail, the determination of the attendance is confirmed by the attendance-related signal generated through the attendance action (operation such as clicking in an app or a web page), and the sending device of the attendance-related signal is matched with pre-registered device-related information. And whether it is determined through reception time of the work-related signal. In the case of overtime work, it can be judged through a procedure similar to work.

Whether or not to work in the work place can be determined by checking whether there is a history of signal reception from a specific terminal within a predetermined time interval at a specific location. A time zone without a reception history can be subtracted from the total work hours from work to work to calculate the time present in the actual work place.

In the case of work, as in the case of work, access to time and attendance-related apps or web pages is performed to perform work-related operations, and the generated signal is judged based on the comparison result with the registered device information and the signal reception time. Can be.

After the information related to time and attendance is processed by the monitoring device 730, the related information is provided to the time and attendance aggregation server 740 (S720). The time and attendance aggregation server 740 may collect received time and attendance-related information and manage attendance, working hours, and the like (S722). Then, this information is provided to the user's terminal 710 so that the user can see it (S724).

8 is a flowchart illustrating a time and attendance management method using a multi-channel simultaneous monitoring apparatus according to another embodiment of the present invention.

Referring to FIG. 8, with regard to the processing of the work day of the day, the monitoring device checks the attendance time by monitoring packets transmitted and received in real time between the terminal and the access point (S810). As described above, when checking the work time, when the work-related signal generated through the app or web page is received, information of a device in which identification information such as a MAC address of the signal sending terminal is pre-registered based on the monitoring history of the packet. Based on the location information of the terminal calculated based on the signal strength information of the packets exchanged with at least one access point, it is determined based on the reception time information of the relevant packet.

Then, it is checked in real time based on a packet that is periodically exchanged between the terminal and the access point to see if a real user exists in the workplace (S820). Then, the check-out time is checked (S830). The time off is checked in a similar way to the handling actions associated with work. Then, the actual working hours are calculated (S840). The actual working hours are the hours minus work hours, and the total work hours minus the time of leaving the workplace. In other words, it is calculated by subtracting the time zone without reception history from the total working hours.

The device may determine whether the actual working time is greater than the prescribed mandatory working time (S850). This may be performed on a daily basis, or may be performed on a weekly and / or monthly basis in a company using a flexible commute.

If the actual working time is greater than the compulsory working time according to the determination result in step S850, the device may determine that a normal work has been performed (S860), otherwise, it is determined that the working time has not been filled and a warning message is sent. It can be taken to (S865).

The embodiment of the present invention is a process related to whether or not a sufficient working time has been filled, and through other embodiments of the present invention, the monitoring device is suitable for commuting within a predetermined time, or whether a departure from work does not exceed a predetermined time. I can grasp the back.

According to another embodiment of the present invention, in the case of an exception in which work or work is not handled, a warning message is sent to the user of the terminal after 30 minutes elapse. In addition, when the processing related to time and attendance is forgotten, a method of automatically determining the signal reception time closest to the reference time for work and work as an attendance time may be used. In addition, when a registered user terminal is lost or a smile occurs accidentally on a specific work day, a temporary attendance tag can be received from the company's personnel team to check the attendance, and the monitoring device and the server are assigned to the temporary attendance tag. It stores the device identification information for the device or directly inputs and stores the device identification information. At this time, the T & A tag includes an RFID-based tag, and is a tag that generates a short-range communication signal such as Wi-Fi, and has a function for access and charging. Other devices that can connect to Wi-Fi (laptops, smart pads, etc.) are also temporarily recognized and can be used for attendance.

Although described above with reference to the drawings and examples, the protection scope of the present invention is not meant to be limited by the drawings or examples, and those skilled in the art will think of the present invention described in the following claims And it will be understood that various modifications and changes may be made to the present invention without departing from the scope.

Claims (18)

In the channel monitoring method in the local area network of the channel monitoring device,
Searching for at least one short-range communication channel currently used in the vicinity by searching for at least one access point (AP) through a first interface;
And monitoring a packet transmitted and received through the at least one peripheral access point according to the scheduled time by scheduling a monitoring time for the searched at least one short-range communication channel.
The second interface is an interface corresponding to the frequency band of the searched at least one short-range communication channel,
The first interface periodically searches for the at least one peripheral access point to update information on at least one short-range communication channel currently used in the vicinity,
The first interface searches for a neighboring access point and only channels used in the neighboring access point,
The first interface searches for information on the at least one short-range communication channel currently used in the vicinity according to a predetermined period, but changes the discovery period to correspond to the amount of packets according to the discovery, and A method for monitoring a channel in a local area network of a channel monitoring apparatus, wherein information on the at least one short range communication channel is updated based on the update. According to claim 1,
The first interface and the second interface are channel monitoring method in a local area network of a channel monitoring device including an antenna associated with a local area network. The method of claim 1, wherein the second interface,
The first short-range communication channel-the first short-range communication channel is included in the searched at least one short-range communication channel-performs monitoring in a first section of a predefined monitoring cycle,
For a second short-range communication channel-a second short-range communication channel is included in the searched at least one short-range communication channel-a channel monitoring device for monitoring in a second section subsequent to the first section of the predefined monitoring cycle Channel monitoring method within a local area network. The method of claim 3,
If the first short-range communication channel is a channel in which many packets are generated above a reference value among the searched at least one short-range communication channel, a channel monitoring apparatus for controlling to monitor and monitor the first short-range communication channel through a third interface Channel monitoring method in a local area network. The method of claim 4,
When the difference between the packet transmission / reception amount of the first short-range communication channel and the packet transmission / reception amount of the second short-range communication channel is smaller than a reference value when searching for the peripheral access point, the second interface and the third interface are substantially equal. Channel monitoring method in a local area network of a channel monitoring device that controls to perform monitoring by dividing the time. According to claim 1,
The monitoring time for each of the searched at least one short-range communication channel is a channel monitoring method in the short-range network of the channel monitoring device that is allocated in proportion to the amount of packets transmitted and received in the short-range communication channel within a preset search time. A device for monitoring a channel in a local area network,
A first interface for searching for at least one peripheral access point;
A second interface for monitoring packets in a first frequency band, said first frequency band comprising a frequency band associated with near field communication; And
A processor, wherein the processor
Searching for the at least one nearby access point (AP) through the first interface and searching for at least one short-range communication channel currently used in the vicinity; And
The monitoring time is scheduled for the at least one short-range communication channel to be controlled to monitor packets transmitted and received through the at least one peripheral access point according to the scheduled time, using the second interface.
The processor controls the first interface to periodically search for the peripheral access point to update information on at least one short-range communication channel currently used in the vicinity,
The first interface searches for a neighboring access point and only the channels used in the access point,
The first interface searches for information on the at least one short-range communication channel currently used in the vicinity according to a predetermined period, but varies the discovery period to correspond to the amount of packets according to the discovery, and A channel monitoring device in a local area network that updates information on the at least one local area communication channel based on the same. In the channel monitoring method in the local area network of the channel monitoring device,
Monitoring a first packet provided from a first terminal capable of short-range communication to a first access point (AP) around the channel monitoring apparatus; And
Checking the reception time of the first packet and the MAC address of the first terminal, the MAC address of the first terminal is included in the first packet; but, the monitoring of the first packet includes:
Searching for at least one local area communication channel currently used in the vicinity by searching for at least one peripheral access point through a first interface included in the device, wherein the at least one peripheral access point includes the first access point box;
And monitoring a packet transmitted and received through the searched at least one neighboring access point according to the scheduled time by scheduling a monitoring time for the searched at least one short-range communication channel, and using a second interface,
The second interface is an interface corresponding to the frequency band of the searched at least one short-range communication channel,
The first interface searches for a neighboring access point and only channels used by the neighboring access point,
The first interface searches for information on the at least one short-range communication channel currently used in the vicinity according to a predetermined period, but varies the discovery period to correspond to the amount of packets according to the discovery, and A channel monitoring method in a local area network that updates information on the at least one local area communication channel based on the same. The method of claim 8,
The first interface periodically searches for the at least one peripheral access point to update information on at least one short-range communication channel used in the current surroundings. A channel monitoring method in a local area network of a channel monitoring device. The method of claim 8,
The first packet includes a packet requesting confirmation of work to a work place associated with the first access point,
Checking the reception time of the first packet and the MAC address of the first terminal,
Checking whether a reception time of the first packet is included in a time zone related to work; And
And comparing the MAC address of the first terminal with the MAC address of a pre-stored terminal to check for attendance. The method of claim 8,
The first packet includes a packet requesting confirmation of departure from a workplace associated with the first access point,
Checking the reception time of the first packet and the MAC address of the first terminal,
Checking whether a reception time of the first packet is included in a time zone related to work; And
And comparing the MAC address of the first terminal with the MAC address of a pre-stored terminal to check for leaving work. The method of claim 8,
And monitoring at least one packet periodically transmitted and received from the first terminal to the first access point to determine whether the first terminal is actually present in a workplace associated with the first access point. Channel monitoring method in a local area network. The method of claim 12,
Further comprising the step of calculating the actual working hours by subtracting the time that does not actually exist in the total working hours calculated based on the time to go to work and the time to leave work from the work, the local area network of the channel monitoring device further comprising Channel monitoring method. The method of claim 8,
The first packet includes a packet for confirming the attendance of the workplace associated with the first access point,
The method further comprises providing the T & A information based on the monitoring result of the first packet to a first server-the first server is a server that aggregates T & A information-monitoring the channel in the local area network of the channel monitoring device. Way. The method of claim 14,
The T & A information provided to the server includes channel identification information of the first terminal, signal strength information of the first packet, and reception time information. In the channel monitoring device in the local area network,
A first interface for searching for at least one peripheral access point;
A second interface for monitoring packets in a first frequency band, said first frequency band comprising a frequency band associated with near field communication; And
Including a processor, the processor,
Monitoring a first packet provided from a first terminal capable of short-range communication to a first access point (AP) around the channel monitoring apparatus; And
Control to check the reception time of the first packet and the MAC address of the first terminal-the MAC address of the first terminal is included in the first packet,
With regard to monitoring for the first packet, the processor searches for at least one peripheral access point through the first interface, wherein the at least one peripheral access point includes the first access point-and the current peripheral Search for at least one short-range communication channel used in,
The first packet is monitored by monitoring a packet transmitted / received through the searched at least one peripheral access point according to a scheduled time by scheduling a monitoring time for the searched at least one short-range communication channel,
The first interface searches for a neighboring access point and only channels used by the neighboring access point,
The first interface searches for information on the at least one short-range communication channel currently used in the vicinity according to a predetermined period, but varies the discovery period to correspond to the amount of packets according to the discovery, and A channel monitoring device in a local area network that updates information on the at least one local area communication channel based on the same. The method of claim 16,
And the processor controls the first interface to periodically search for the at least one peripheral access point to update information on at least one short-range communication channel used in the current periphery. A system for monitoring a channel in a local area network,
Monitor a first packet provided from a first terminal capable of short-range communication to a first access point (AP) around a monitoring device, receive time of the first packet and MAC address of the first terminal-the first A monitoring device that controls to check that the MAC address of one terminal is included in the first packet; And
And a time and attendance management server that manages the time and attendance of the user associated with the first terminal based on the reception time information included in the first packet and the MAC address of the first terminal from the monitoring device,
The monitoring device searches for a channel used in the peripheral access point as it searches for a nearby access point using the first interface,
The first interface searches for information on at least one short-range communication channel currently used in the vicinity according to a predefined period, but varies a discovery period to correspond to the amount of packets according to the discovery, and is based on the changed discovery period. A system for monitoring a channel in a local area network that updates information on the at least one local area communication channel.

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