JP6178219B2 - Wireless network monitoring device, wireless network monitoring method, and wireless network monitoring program - Google Patents

Description

  Embodiments described herein relate generally to a wireless network monitoring device, a wireless network monitoring method, and a wireless network monitoring program.

  Conventionally, in a wireless network such as a wireless local area network (LAN), a monitoring device such as a PC (Personal Computer) uses a predetermined wireless channel (hereinafter referred to as a channel) between an AP (Access Point) and a wireless terminal. There are cases where the status of the communication being performed is monitored. This monitoring apparatus monitors or captures all communication states flowing through a channel selected as a channel to be monitored using a wireless LAN adapter that supports the promiscuous mode.

JP 2004-166104 A

  In the monitoring device, in order to reduce the missed communication to be monitored, it is necessary to efficiently select a channel with a lot of communication from a plurality of channels. However, in the conventional monitoring device, selection of a channel to be monitored and determination of a monitoring time in the channel are left to an administrator, and it is difficult to efficiently monitor communication.

  The present invention has been made in view of the above, and an object of the present invention is to provide a wireless network monitoring device, a wireless network monitoring method, and a wireless network monitoring program that enable efficient communication monitoring. .

  In order to solve the above-described problems and achieve the object, a wireless network monitoring apparatus according to an embodiment includes a channel setting unit that sequentially sets a monitoring target channel for monitoring communication among a plurality of channels related to the wireless network; A monitoring time setting unit for setting a monitoring time for monitoring communication based on a communication state monitored in the past by the monitoring target channel for each of the sequentially set monitoring target channels; A communication monitoring unit that monitors communication for the monitoring target channel at the set monitoring time.

  According to the wireless network monitoring apparatus according to the embodiment, there is an effect that efficient communication monitoring can be performed.

FIG. 1 is a diagram illustrating a configuration example of a wireless network. FIG. 2 is a block diagram illustrating a configuration example of the monitoring apparatus according to the first embodiment. FIG. 3 is a flowchart illustrating an example of the operation of the monitoring apparatus according to the first embodiment. FIG. 4 is a flowchart illustrating an example of processing relating to setting of the monitoring time. FIG. 5 is an explanatory diagram for explaining the transition of the monitoring target channel in the comparative example. FIG. 6 is an explanatory diagram illustrating the transition of the monitoring target channel according to the first embodiment. FIG. 7 is a flowchart illustrating an example of the operation of the monitoring apparatus according to the second embodiment. FIG. 8 is an explanatory diagram for explaining the transition of the monitoring target channel and the all channel scan according to the second embodiment. FIG. 9 is a flowchart illustrating an example of the operation of the monitoring apparatus according to the third embodiment. FIG. 10 is an explanatory diagram for explaining the transition of the monitoring target channel and the all channel scan according to the third embodiment. FIG. 11 is a diagram illustrating that the processing in the monitoring device is specifically realized using a computer.

  Hereinafter, a wireless network monitoring device, a wireless network monitoring method, and a wireless network monitoring program according to embodiments will be described in detail with reference to the accompanying drawings. In the following description, common constituent elements are given common reference numerals, and redundant description is omitted.

(First embodiment)
FIG. 1 is a diagram illustrating a configuration example of a wireless network N. As shown in FIG. 1, a wireless network N is a communication network in which a terminal between an access point AP and a wireless terminal 100 performs wireless communication via a predetermined channel among a plurality of channels. ) Etc. In the case of a wireless LAN, wireless communication between terminals can be performed by setting an arbitrary channel from a plurality of channels (1 to 13ch) to the access point AP and the wireless terminal 100 according to a standard such as IEEE 802.11g. Do. In the present embodiment, a wireless LAN is exemplified as the wireless network N, but any communication network that performs wireless communication through a predetermined channel from among a plurality of channels may be used.

  The wireless terminal 100 is an information processing apparatus having a wireless communication function for performing wireless communication via the wireless network N using a wireless LAN adapter or the like, and may be, for example, a mobile phone or a notebook PC. In addition, one of the wireless terminals 100 operates the wireless LAN adapter in a promiscuous mode in which a signal (communication) that is not a data packet addressed to the wireless LAN adapter is captured and processed, and flows through a channel selected as a channel to be monitored. This is a monitoring device 1 having a communication monitoring function for monitoring or capturing a communication state. In the present embodiment, a configuration in which one of the wireless terminals 100 is used as the monitoring device 1 is illustrated, but the communication monitoring function of the monitoring device 1 may be provided on the access point AP side.

  FIG. 2 is a block diagram illustrating a configuration example of the monitoring device 1 according to the first embodiment. As shown in FIG. 2, the monitoring device 1 includes a control unit 10, a communication unit 20, an input unit 30, an output unit 40, and a storage unit 50.

  The control unit 10 has an internal memory for storing a program that defines various processing procedures and necessary data, and a CPU (Central Processing Unit) monitors the program by sequentially executing the program stored in the internal memory. The operation of the device 1 is controlled. Specifically, the monitoring channel setting unit 11, the monitoring time setting unit 12, and the communication monitoring unit 13 are provided as functional configurations realized by the CPU sequentially executing programs.

  The communication unit 20 is a processing unit that performs data communication on a predetermined channel with an access point AP included in a wireless communicable range. The communication unit 20 corresponds to a wireless LAN adapter, a communication device, and the like. The control unit 10 uses the communication unit 20 to exchange data with the access point AP. Further, the control unit 10 operates or monitors the communication unit 20 in the promiscuous mode to monitor or capture all communication states flowing through the channel selected as the channel to be monitored.

  The input unit 30 is an input device used when a user or the like inputs various data to the monitoring device 1. The input unit 30 corresponds to, for example, a keyboard, a mouse, a touch panel, and the like. The output unit 40 is a display device that displays various types of information. The output unit 40 corresponds to, for example, a display. The storage unit 50 stores data and programs necessary for various processes performed by the control unit 10. The storage unit 50 corresponds to a storage device such as a semiconductor memory element such as a flash memory, a hard disk, or an optical disk, for example.

  The monitoring channel setting unit 11 sequentially sets a monitoring target channel for monitoring communication from among a plurality of channels related to the wireless network N. For example, in the case of a wireless LAN according to IEEE 802.11g, the monitoring channel setting unit 11 sequentially sets monitoring target channels for monitoring communication from 1 to 13 ch, such as 1 ch → 2 ch → 3 ch →.

  The monitoring time setting unit 12 sets a monitoring time for monitoring communication based on the state of communication monitored in the past in the monitoring target channel for each of the monitoring target channels set sequentially. The communication status monitored in the past in the monitoring target channel is sequentially stored in the internal memory of the control unit 10 or the like when communication in the monitoring target channel is performed. The monitoring time setting unit 12 sets the monitoring time with reference to the communication state monitored in the past by the monitoring target channel, which is sequentially stored in the internal memory.

  Here, the state of communication is the presence / absence of communication in the monitoring target channel (whether or not communication is observed), and when communication is performed, the communication amount (number of packets) of data transmitted and received in the communication, This is the communication time during which data was sent and received.

  The monitoring time setting unit 12 is shorter than the normal time when there is no communication in the past (predetermined period) from the monitoring target channel, or when at least one of the communication amount and the communication time is equal to or less than a predetermined value. Set the monitoring time. In addition, the monitoring time setting unit 12 performs communication over the monitoring target channel in the past (predetermined period from the most recent time), and when at least one of the communication amount and the communication time is greater than or equal to a predetermined value, it is more than normal. Set a longer monitoring time. Details of the setting of the monitoring time will be described later.

  The communication monitoring unit 13 operates the communication unit 20 in the promiscuous mode, and performs monitoring processing of communication for monitoring or capturing all communication states flowing through the monitoring target channel. Specifically, the communication monitoring unit 13 monitors the communication for the monitoring target channels sequentially set by the monitoring channel setting unit 11 with the monitoring time set by the monitoring time setting unit 12. The data obtained for the monitoring target channel by the monitoring process by the communication monitoring unit 13 is notified to the user by being displayed and output on the output unit 40 under the control of the control unit 10.

  Next, details of the operation of the monitoring apparatus 1 by the monitoring channel setting unit 11, the monitoring time setting unit 12, and the communication monitoring unit 13 will be described. FIG. 3 is a flowchart illustrating an example of the operation of the monitoring device 1 according to the first embodiment.

  As shown in FIG. 3, when the process is started, the control unit 10 performs initial setting of the process (S11). In this initial setting, a channel to be a monitoring target channel among a plurality of channels, a first monitoring target channel, an initial value of the monitoring time of each channel, an upper limit and a lower limit (lower limit ≧ 0), or either one of them. A value or the like is set based on setting information stored in the storage unit 50 or input from the user by the input unit 30.

  Next, the monitoring time setting unit 12 sets a monitoring time for monitoring communication based on the communication status monitored in the past in the monitoring target channel (S12). Note that the monitoring time set in the initial setting is set for the first process that has not been monitored in the past for the monitoring target channel.

  FIG. 4 is a flowchart illustrating an example of processing relating to setting of the monitoring time. As shown in FIG. 4, when the monitoring time setting is started in S12, the monitoring time setting unit 12 for the monitoring target channel, the communication status (communication in the past (predetermined period)) stored in the internal memory. And the like (S101).

  Next, the monitoring time setting unit 12 determines whether or not the past communication status confirmed for the monitoring target channel satisfies the condition for increasing the monitoring time (S102). Specifically, the monitoring time setting unit 12 satisfies the increase condition when communication (communication amount, communication time) of a predetermined value or more set in advance has been observed in the past.

  When the increase condition is not satisfied (S102: NO), the monitoring time setting unit 12 determines whether or not the past communication status confirmed for the monitoring target channel satisfies the condition for decreasing the monitoring time (S103). Specifically, the monitoring time setting unit 12 satisfies the decrease condition when the communication (communication amount, communication time) observed in the past is equal to or less than a predetermined value set in advance.

  When the increase condition is satisfied (S102: YES), the monitoring time setting unit 12 increases the monitoring time by a predetermined value (Δ) from the monitoring time set in the previous process, and sets the increased monitoring time. Set (S104). Note that the information such as the monitoring time set in the previous process is sequentially stored in an internal memory or the like. The increase in the monitoring time is limited to a preset upper limit, and when the monitoring time reaches the upper limit, the monitoring time is not increased. Therefore, when the past communication condition for the monitoring target channel satisfies the condition for increasing the monitoring time, the monitoring time increases by a predetermined value (Δ) unless the monitoring time reaches the upper limit.

  When the condition for reduction is satisfied (S103: YES), the monitoring time setting unit 12 decreases the monitoring time by a predetermined value (Δ) from the monitoring time set in the previous process, and sets the monitoring time after the reduction. Set (S105). Note that the monitoring time is reduced to a preset lower limit, and when the monitoring time reaches the lower limit, the monitoring time is not reduced. Therefore, when the past communication condition for the monitoring target channel satisfies the condition for reducing the monitoring time, the monitoring time is reduced by a predetermined value (Δ) unless the monitoring time reaches the lower limit.

  When the decrease condition is not satisfied (S103: NO), the monitoring time setting unit 12 sets the previous monitoring time as it is without increasing or decreasing from the previous monitoring time (S106).

  Returning to FIG. 3, following S12, the communication monitoring unit 13 operates the communication unit 20 in the promiscuous mode, and starts monitoring the communication of the monitoring target channel (S13). Next, the communication monitoring unit 13 determines whether or not the monitoring time from the start of monitoring has reached the monitoring time set in S12 and the monitoring time has ended (S14). Here, the communication monitoring unit 13 waits for processing until the set monitoring time is reached, and continues to monitor communication.

  When the set monitoring time is reached (S14: YES), the communication monitoring unit 13 ends the monitoring of the communication of the monitoring target channel (S15). Next, the control unit 10 determines whether or not a condition for ending the process is satisfied by an input for instructing the end from the user by the input unit 30 (S16). When the condition for ending the process is satisfied (S16: YES), the control unit 10 ends the process.

  When the process is not satisfied and the process is continued (S16: NO), the monitoring channel setting unit 11 sets the next monitoring target channel from the channels that are candidates for the monitoring target channel (S17), The process returns to S12. Thereby, in the monitoring apparatus 1, the monitoring target channel is sequentially set, and the process of monitoring the communication of the monitoring target channel is continued.

  FIG. 5 is an explanatory diagram for explaining the transition of the monitoring target channel in the comparative example. As shown in FIG. 5, in the comparative example, the channels to be monitored channel candidates are 1 to 4 channels. In the comparative example, it is assumed that the administrator selects a channel to be monitored and determines the monitoring time in the channel so that the channels 1 to 4 are circulated and monitored in the monitoring time (t). . That is, the monitoring of communication changes in the monitoring time (t) as 1 → 2 → 3 → 4 → 1 →.

  In the comparative example described above, for example, communication that cannot be monitored increases in the channel (1) with much communication. On the other hand, the channel (3) having no communication is monitored with the same monitoring time as the channel (1). Therefore, in the comparative example, regardless of the presence or absence of communication, monitoring of communication is performed according to a schedule set in advance by the administrator, so it is difficult to efficiently monitor communication according to the communication status.

  FIG. 6 is an explanatory diagram for explaining the transition (T1 to T8) of the monitoring target channel according to the first embodiment. As shown in FIG. 6, channels 1 and 2 are candidates for the monitoring target channel.

Further, it is assumed that (t) is set as the initial value of the monitoring time, and parameters relating to the increase / decrease of the monitoring time are set as follows (1) to (6).
(1) The past period (n) to be referred from the latest is set to two monitoring times (n = 2).
(2) The condition for increasing the monitoring time is one or more communication observations.
(3) The condition for reducing the monitoring time is no communication observation.
(4) The increase / decrease width of the monitoring time is Δ.
(5) The upper limit of the monitoring time is t + 2Δ.
(6) The lower limit of the monitoring time is t-2Δ.

  As shown in FIG. 6, in the monitoring of the communication of the channel (1) in the monitoring device 1, since one or more communications were observed in the last two monitoring times (T1, T3), the monitoring time at T5 is Δ minutes. Will increase. Similarly, since one or more communications were observed during the monitoring times of T3 and T5, the monitoring time at T7 is t + 2Δ, which is increased by Δ from the previous time. Note that the monitoring time after T7 has reached the upper limit and therefore does not increase.

  Moreover, in the monitoring of the communication of the channel (2) in the monitoring device 1, since the communication more than once was not observed in the last two monitoring times (T2, T4), the monitoring time at T6 is reduced by Δ. Become. Similarly, since one or more communications were not observed during the monitoring times of T4 and T6, the monitoring time at T8 is t−2Δ, which is decreased by Δ from the previous time. In addition, since the monitoring time after T8 has reached the lower limit, it does not decrease.

  As described above, in the monitoring device 1, for example, the monitoring time increases in the channel (1) with a lot of communication, and the monitoring time decreases in the channel (2) with no (less) communication. Communication can be monitored.

(Second Embodiment)
Next, a second embodiment will be described. The second embodiment is different from the first embodiment in that the monitoring time is set by scanning all of the plurality of channels related to the wireless network N.

  FIG. 7 is a flowchart illustrating an example of the operation of the monitoring device 1 according to the second embodiment. As shown in FIG. 7, when the process is started, the control unit 10 performs initial setting of the process in the same manner as S11 described above (S21). In this initial setting, the lower limit of the monitoring time of each channel is “lower limit = 0”.

  Next, the communication monitoring unit 13 causes the communication unit 20 to operate in the promiscuous mode and starts monitoring the communication of the monitoring target channel (S22). Next, the communication monitoring unit 13 determines whether or not the monitoring time has been reached after reaching the set monitoring time from the start of monitoring (S23). Here, the communication monitoring unit 13 waits for processing until the set monitoring time is reached, and continues to monitor communication.

  When the set monitoring time is reached (S23: YES), the communication monitoring unit 13 ends the monitoring of the communication of the monitoring target channel (S24). Next, the control unit 10 determines whether or not monitoring of the monitoring target channel has been completed for all the channels that are candidates for the monitoring target channel (S25).

  When monitoring of the monitoring target channel is not completed (S25: NO), the monitoring channel setting unit 11 sets the next monitoring target channel from the channels that are candidates for the monitoring target channel (S26), and the process proceeds to S22. To return.

  When the monitoring of the monitoring target channel is completed (S25: YES), the control unit 10 determines whether or not a condition for ending the processing is satisfied by an input for instructing the end from the user by the input unit 30 or the like ( S27). When the condition for ending the process is satisfied (S27: YES), the control unit 10 ends the process.

  When the process is not satisfied and the process is continued (S27: NO), the control unit 10 sequentially transmits all of the plurality of channels related to the wireless network N at a predetermined time interval (scan time) by the communication unit 20. All channel scans to be scanned are executed (S28). This scan time is sufficiently shorter than the monitoring time for monitoring communication.

  Next, the monitoring time setting unit 12 sets the monitoring time for the monitoring target channel based on whether or not communication is observed in the all channel scan (S29). Specifically, if communication is observed in all channel scans for each of the channels to be monitored by the same processing as in FIG. 4, it is monitored from the previous monitoring time, assuming that the condition for increasing the monitoring time is satisfied. Increase time. Further, when communication is not observed for all channels to be monitored, the monitoring time is reduced from the previous monitoring time, assuming that the condition for reducing the monitoring time is satisfied.

  Next, the monitoring channel setting unit 11 deletes the channel whose monitoring time is set to the lower limit (= 0) from the monitoring target channel (S30). As a result, the monitoring device 1 can delete a channel in which communication is not observed in the all channel scan from the monitoring target channel and prevent unnecessary monitoring time from being generated.

  Next, the monitoring channel setting unit 11 newly sets a channel that has been communicated in all channel scans as a monitoring target channel for channels other than the monitoring target channel (S31), and returns the process to S22. As a result, when communication is observed on a channel other than the monitoring target channel at the time of all channel scanning, that channel can be newly set as the monitoring target channel. Note that the initial value of the monitoring time when a new channel to be monitored is set may be not only the initial value (t) of the monitoring time but also an increment (Δ).

  FIG. 8 is an explanatory diagram for explaining transitions (T11 to T15) of monitoring target channels and all channel scans (A1, A2) according to the second embodiment. As shown in FIG. 8, all channel scans are performed on channels (1) to (3), and initial values of channels to be monitored channel candidates are channel (1) and channel (2). And

Further, it is assumed that (t) is set as the initial value of the monitoring time, and parameters relating to the increase / decrease of the monitoring time are set as follows (1) to (6).
(1) The past scan time (n) referred from the most recent time is set to one scan time (n = 1).
(2) The condition for increasing the monitoring time is one or more communication observations.
(3) The condition for reducing the monitoring time is no communication observation.
(4) The increase / decrease width of the monitoring time is Δ.
(5) The upper limit of the monitoring time is t + 2Δ.
(6) The lower limit of the monitoring time is set to 0.

  As shown in FIG. 8, in the monitoring of the communication of the channel (1) in the monitoring device 1, since the communication was observed in all channel scans (A1, A2), the respective monitoring times of T11 and T13 are increased by Δ from the previous time. Will be. Note that the monitoring time after T13 does not increase because it has reached the upper limit.

  In the monitoring of the communication of the channel (2) in the monitoring device 1, since the communication was not observed in all channel scans (A1, A2), the respective monitoring times of T12 and T14 are reduced by Δ from the previous time. Here, for T14, since the monitoring time is set to the lower limit, the channel (2) is deleted from the monitoring target channel. Accordingly, communication is not monitored at T14.

  The channel (3) in the monitoring device 1 is not a channel to be monitored at first, but communication is observed in the all-channel scan (A2), so it newly joins the channel to be monitored. As a result, communication is monitored at the monitoring time (Δ) at T15.

  As described above, in the second embodiment, by monitoring all of a plurality of channels related to the wireless network N and setting the monitoring time, for example, the monitoring time is increased in the channel (1) with much communication, and the communication time is increased. Since the monitoring time is reduced in the channel (2) having no (less) channels, it is possible to efficiently monitor the communication according to the communication status. Further, the channel (3) in which communication is newly observed can be added to the new monitoring target channel.

(Third embodiment)
Next, a third embodiment will be described. The third embodiment is different from the first and second embodiments in that a channel for which communication is confirmed by scanning all of a plurality of channels related to the wireless network N is set as a monitoring target channel.

  FIG. 9 is a flowchart illustrating an example of the operation of the monitoring device 1 according to the third embodiment. As shown in FIG. 9, when the process is started, the control unit 10 performs initial setting of the process in the same manner as S11 described above (S41).

  As in S28, the control unit 10 causes the communication unit 20 to perform all channel scans that sequentially scan all of the plurality of channels related to the wireless network N at a predetermined scan time (S42), and has communication been observed during the scan? It is determined whether or not (S43). Here, the control unit 10 waits for the process to continue the all-channel scan while not observing communication during the scan.

  When the communication is observed (S43: YES), the monitoring channel setting unit 11 sets the channel for which the communication is observed as the monitoring target channel, and the monitoring time setting unit 12 sets the monitoring time of the monitoring target channel (S44). ). As for the setting of the monitoring time, the monitoring time may be set based on the past communication state or the preset initial value (t) may be set by the same processing as in FIG.

  Next, the communication monitoring unit 13 operates the communication unit 20 in the promiscuous mode, and starts monitoring the communication of the monitoring target channel (S45). Next, the communication monitoring unit 13 determines whether or not the monitoring time has been reached after the monitoring time set after the monitoring has started (S46). Here, the communication monitoring unit 13 waits for processing until the set monitoring time is reached, and continues to monitor communication.

  When the set monitoring time is reached (S46: YES), the communication monitoring unit 13 ends the monitoring of the communication of the monitoring target channel (S47). Next, the control unit 10 determines whether or not a condition for ending the process is satisfied by an input for instructing the end from the user by the input unit 30 (S48). When the condition for ending the process is satisfied (S48: YES), the control unit 10 ends the process.

  When the process is not satisfied and the process is continued (S48: NO), the control unit 10 returns the process to S42, sets the monitoring target channel from the all channel scan, and monitors the communication of the monitoring target channel. Continue processing.

  FIG. 10 is an explanatory diagram for explaining transitions (T21 to T23) of monitoring target channels and all channel scans (A1, A2) according to the third embodiment. As shown in FIG. 10, all channel scans are performed for channels (1) to (3), the monitoring time is (t), and the first monitoring target channel is channel (1).

  As shown in FIG. 10, the monitoring device 1 performs the all channel scan (A1) after monitoring the communication of the channel (1). Here, since the communication of the channel (1) is observed, the all-channel scan (A1) is terminated, and the communication of the channel (1) is monitored in the monitoring time (t) (T22).

  After T22, the monitoring apparatus 1 performs all channel scan (A2). Here, since communication was not observed in the channel (1), the monitoring device 1 continues scanning after the channel (2). And since the communication of the channel (3) was observed, the monitoring apparatus 1 complete | finishes all the channel scans (A2), and the monitoring of the communication of the channel (3) is performed in the monitoring time (t) (T23). Thereafter, the same processing is continued until the end.

  As described above, in the third embodiment, by monitoring all of a plurality of channels related to the wireless network N and setting a monitoring target channel, for example, the channel (1) with much communication is monitored as the monitoring target channel. The channel (2) with no (less) communication is not set as a channel to be monitored and the number of opportunities to be monitored is reduced. Therefore, it is possible to efficiently monitor communication according to the communication status. .

  FIG. 11 is a diagram illustrating that the processing in the monitoring device 1 is specifically realized using a computer. As illustrated in FIG. 11, the computer 1000 includes, for example, a memory 1010, a CPU 1020, a hard disk drive interface 1030, a disk drive interface 1040, a serial port interface 1050, a video adapter 1060, and a network interface 1070. These units are connected by a bus 1080.

  The memory 1010 includes a ROM (Read Only Memory) 1011 and a RAM (Random Access Memory) 1012. The ROM 1011 stores a boot program such as BIOS (Basic Input Output System). The hard disk drive interface 1030 is connected to the hard disk drive 1031. The disk drive interface 1040 is connected to the disk drive 1041. For example, a removable storage medium such as a magnetic disk or an optical disk is inserted into the disk drive 1041. The serial port interface 1050 is connected to a mouse 1051 and a keyboard 1052, for example. The video adapter 1060 is connected to the display 1061, for example.

  The hard disk drive 1031 stores, for example, an OS 1091, an application program 1092, a program module 1093, and program data 1094. That is, the above program is stored in, for example, the hard disk drive 1031 as a program module 1093 in which a command to be executed by the computer 1000 is described. For example, a program module 1093 for executing information processing similar to the functional configuration (monitoring channel setting unit 11, monitoring time setting unit 12, communication monitoring unit 13) in the monitoring device 1 is stored in the hard disk drive 1031.

  In addition, setting data necessary for processing in the above-described embodiment is stored as program data 1094 in, for example, the memory 1010 or the hard disk drive 1031. Then, the CPU 1020 reads the program module 1093 and the program data 1094 stored in the memory 1010 and the hard disk drive 1031 to the RAM 1012 as necessary, and executes them.

  The program module 1093 and the program data 1094 are not limited to being stored in the hard disk drive 1031, but may be stored in a removable storage medium, for example, and read out by the CPU 1020 via the disk drive 1041 or the like. Alternatively, the program module 1093 and the program data 1094 may be stored in another computer connected via a network (LAN, WAN (Wide Area Network), etc.) and read by the CPU 1020 via the network interface 1070. .

  DESCRIPTION OF SYMBOLS 1 ... Monitoring apparatus, 10 ... Control part, 11 ... Monitoring channel setting part, 12 ... Monitoring time setting part, 13 ... Communication monitoring part, 20 ... Communication part, 30 ... Input part, 40 ... Output part, 50 ... Memory | storage part, DESCRIPTION OF SYMBOLS 100 ... Wireless terminal, AP ... Access point, N ... Wireless network, 1000 ... Computer.

Claims (7)

A channel setting unit that sequentially sets a monitoring target channel for monitoring communication among a plurality of channels related to the wireless network;
For each of the sequentially set monitoring target channels, when at least one of the communication amount and communication time monitored in the past in the monitoring target channel exceeds a predetermined value, a monitoring time longer than the previous monitoring time is set, A monitoring time setting unit that sets a monitoring time shorter than the previous monitoring time when at least one of the communication volume and communication time monitored in the past in the monitoring target channel is less than a predetermined value ;
A communication monitoring unit for monitoring communication for the sequentially set monitoring target channels with the set monitoring time;
A wireless network monitoring apparatus comprising: A channel setting unit that sequentially sets a monitoring target channel including a channel that is confirmed to be communicated in the scan after scanning all of the plurality of channels related to the wireless network;
Among the sequentially set channels to be monitored, the monitoring time of the channel whose communication is confirmed by the scan is set to a monitoring time longer than the previous monitoring time, and the monitoring time of the channel whose communication is not confirmed by the scan is set. A monitoring time setting unit for setting a monitoring time shorter than the previous monitoring time;
A communication monitoring unit for monitoring communication for the sequentially set monitoring target channels with the set monitoring time;
A wireless network monitoring apparatus comprising: The channel setting unit deletes, from the monitoring target channel, a channel whose monitoring time is set to a predetermined value or less by the monitoring time setting unit.
The wireless network monitoring apparatus according to claim 2 . A wireless network monitoring method executed by a wireless network monitoring device,
A channel setting step for sequentially setting channels to be monitored from among a plurality of channels related to the wireless network;
For each of the sequentially set monitoring target channels, when at least one of the communication amount and communication time monitored in the past in the monitoring target channel exceeds a predetermined value, a monitoring time longer than the previous monitoring time is set, A monitoring time setting step for setting a monitoring time shorter than the previous monitoring time when at least one of the communication amount and the communication time monitored in the past in the monitoring target channel is lower than a predetermined value ;
A communication monitoring step of monitoring communication for the sequentially set monitoring target channels with the set monitoring time;
A wireless network monitoring method comprising: A wireless network monitoring method executed by a wireless network monitoring device,
A channel setting step for sequentially setting channels to be monitored, including channels for which communication has been confirmed in the scan after scanning all of the plurality of channels related to the wireless network;
Among the sequentially set channels to be monitored, the monitoring time of the channel whose communication is confirmed by the scan is set to a monitoring time longer than the previous monitoring time, and the monitoring time of the channel whose communication is not confirmed by the scan is set. A monitoring time setting step for setting a monitoring time shorter than the previous monitoring time;
A communication monitoring step of monitoring communication for the sequentially set monitoring target channels with the set monitoring time;
A wireless network monitoring method comprising: On the computer,
A channel setting step for sequentially setting channels to be monitored from among a plurality of channels related to the wireless network;
For each of the sequentially set monitoring target channels, when at least one of the communication amount and communication time monitored in the past in the monitoring target channel exceeds a predetermined value, a monitoring time longer than the previous monitoring time is set, A monitoring time setting step for setting a monitoring time shorter than the previous monitoring time when at least one of the communication amount and the communication time monitored in the past in the monitoring target channel is lower than a predetermined value ;
A communication monitoring step of monitoring communication for the sequentially set monitoring target channels with the set monitoring time;
A wireless network monitoring program characterized in that On the computer,
A channel setting step for sequentially setting channels to be monitored, including channels for which communication has been confirmed in the scan after scanning all of the plurality of channels related to the wireless network;
Among the sequentially set channels to be monitored, the monitoring time of the channel whose communication is confirmed by the scan is set to a monitoring time longer than the previous monitoring time, and the monitoring time of the channel whose communication is not confirmed by the scan is set. A monitoring time setting step for setting a monitoring time shorter than the previous monitoring time;
A communication monitoring step of monitoring communication for the sequentially set monitoring target channels with the set monitoring time;
A wireless network monitoring program characterized in that

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