JP5093155B2 - Management device and program - Google Patents

Description

  The present invention relates to a management apparatus and a program.

  The wireless communication system constructs a network system using an arbitrary wireless communication channel selected from a plurality of wireless communication channels (frequency bands).

  A wireless communication system is affected by interference (for example, WLAN (Wireless LAN) and Bluetooth) due to wireless communication of different wireless standards on the same wireless communication channel, interference by electromagnetic waves (for example, microwave oven and WLAN), and the like. For this reason, unless a wireless communication channel is appropriately set according to the radio wave condition, the throughput may be reduced or communication may be poor, and the operation efficiency of the wireless communication network may be reduced.

  Therefore, an access point that periodically checks the wireless environment information for the wireless communication environment between the terminal and the connected terminal, the wireless environment information is received from the access point, and the wireless communication environment is determined according to the received wireless environment information. There is disclosed a wireless communication system including an access point that needs to be changed and a server that controls to change the setting of the wireless communication environment of a group of terminals connected to the access point (see Patent Document 1).

JP 2006-340353 A

  However, in Patent Document 1, a wireless communication channel with a good radio wave condition is not necessarily assigned to a relay device (access point) with a large amount of communication. Therefore, a wireless communication channel is assigned to the relay device regardless of the actual operation status of the wireless communication system. Therefore, there is a problem that it is difficult to improve the operation efficiency of the wireless communication system.

  In view of the above problems, an object of the present invention is to improve operational efficiency of a wireless communication system.

In order to solve the above problems, the invention described in claim 1 is a management device that manages a plurality of relay devices that perform wireless communication with a plurality of wireless terminal devices, a communication unit that communicates with the relay device, and the relay A data communication amount information group including information on the data communication amount of each device and information on the number of the wireless terminal devices with which each of the relay devices performs wireless communication, and a plurality of wireless communications used for wireless communication with the wireless terminal device When a storage unit for storing data processing speed information group including data processing speed information for each channel and information indicating that the data processing speed is less than or equal to a preset threshold value are received from the relay device The priority order of the relay device is set based on the data communication volume information group, and the priority order of the wireless communication channel is set based on the data processing speed information group. A control unit configured to set the high-priority wireless communication channel in order from the high-priority relay device and control to notify the set wireless communication channel to all the relay devices. It is a feature.
Furthermore, a program for causing a computer to function as the main means shown in the invention described in claim 1 is provided (the invention described in claim 6).

  According to a second aspect of the present invention, in the management device according to the first aspect, the data communication amount information group includes data communication amount that the relay device performs wireless communication with the wireless terminal device during a unit time. A plurality of pieces of data communication volume information acquired for each unit time are included, and the data processing speed information group includes information on the data processing speed of the wireless communication channel for each unit time. A plurality of pieces of acquired data processing speed information are included.

  According to a third aspect of the present invention, in the management device according to the first or second aspect, the control unit sets the priority order of the relay device in order from the largest number of the wireless terminal devices performing wireless communication. The priority order of the relay device is set high.

  According to a fourth aspect of the present invention, in the management device according to the first or second aspect, the control unit calculates a moving average value of the data communication amount of each of the relay devices, and the calculated moving average value is in descending order. Further, the priority order of the relay device is set high.

  According to a fifth aspect of the present invention, in the management device according to the first or second aspect, the control unit calculates an exponential weighted moving average value of each data communication amount of the relay device, and the calculated exponential weighted moving average It is characterized in that the priority order of the relay devices is set higher in descending order.

  According to the present invention, it is possible to improve the operational efficiency of a wireless communication system.

It is a schematic block diagram of a radio | wireless communications system. It is a schematic block diagram of a management apparatus. It is a figure which shows the example of a data traffic table. It is a figure which shows the example of a throughput standard table. It is a schematic block diagram of a relay apparatus. It is a schematic block diagram of a monitor apparatus. It is a figure which shows the example of an electric field strength-throughput conversion table. It is a figure which shows the example of an electric field strength table. It is a flowchart of a data traffic table generation process. It is a flowchart of a throughput standard data transmission process. It is a flow chart of throughput standard table generation processing. It is a flowchart of a channel setting change process. It is a flowchart of a channel change process.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment. The embodiment of the present invention shows the most preferable mode of the present invention, and the terminology of the present invention is not limited to this.

First, the configuration will be described.
FIG. 1 shows a schematic configuration diagram of a wireless communication system A in the present embodiment.
As shown in FIG. 1, the wireless communication system A includes a management device 1, a plurality of relay devices 2 connected to another relay device or the management device 1 via a communication network N, and the relay device 2 wirelessly. And a plurality of wireless terminal devices 3 connected to each other. The management device 1 is connected to the monitor device 4.

FIG. 2 shows a schematic configuration diagram of the management apparatus 1.
As shown in FIG. 2, the management device 1 includes a control unit 10, a storage unit 11, a display unit 12, an operation unit 13, a communication unit 14, and the like, and each unit is electrically connected.

  The control unit 10 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The control unit 10 reads programs, tables, and data specified from various programs, various tables, data, and the like stored in the storage unit 11 and ROM, expands them in the work area of the RAM or the storage unit 11, and Various processes are executed in cooperation with the program, and the processing results are stored in a predetermined area of the RAM or the storage unit 11 and are also instructed to each unit in the management apparatus 1 to control the overall operation of the management apparatus 1 Control.

  The control unit 10 reads the channel setting change processing program stored in the ROM or the storage unit 11, the data communication amount table and the throughput guide table stored in the storage unit 11, and executes the channel setting change process.

  In the channel setting change process, when a communication status deterioration notification is received from any of the relay devices, the priority order of the relay devices is set based on the data communication amount table, and the priority of the wireless communication channel is determined based on the throughput table. Ranking is set. Then, the wireless communication channels with the highest priority are set in order from the relay device with the highest priority, and the wireless communication channels set for all the relay devices are notified.

  The communication status deterioration notification is information indicating that the throughput is equal to or less than a preset threshold value.

  In this channel setting change process, the priority order of the relay device is set in advance according to any one of the following three measures, which is set in advance.

First, the priority of relay devices is set higher in the order of the number of wireless terminal devices with which the relay devices perform wireless communication.
Second, the moving average value of the data communication amount of each relay device is calculated, and the priority order of the relay device is set higher in descending order of the calculated moving average value.
Third, the exponent-weighted moving average value of the data communication amount of each relay device is calculated, and the priority order of the relay device is set higher in the descending order of the calculated exponent-weighted moving average value.

In addition, the control unit 10 reads the data communication amount table generation processing program and various data stored in the ROM or the storage unit 11, executes the data communication amount table generation processing, and generates the data communication amount table in the storage unit 11. To do.
In the data communication amount table generation process, the data communication amount of the detection unit time T of each relay device is acquired for each detection unit time, and is stored in a table in the storage unit 11.

In addition, the control unit 10 reads the throughput guide table generation processing program and various data stored in the ROM or the storage unit 11, executes the throughput guide table generation processing, and converts the data received from the monitor device 4 into the storage unit 11. Based on this, a throughput guideline table is generated.
In the throughput guide table generation processing, the throughput during the detection unit time T of each channel is acquired for each detection unit time T, and is stored in a table in the storage unit 11.

  The storage unit 11 includes a nonvolatile memory (for example, an HDD (Hard Disk Drive)) that can be electrically erased and rewritten, such as a magnetic or optical recording medium or a semiconductor, and is fixed to the management device 1. Provided or attached detachably. In addition to the various programs executed by the control unit 10 and the various tables and data used in these programs, the storage unit 11 includes a channel setting change processing program, a data communication amount table 11a, a throughput guide table 11b, and the like in advance. It is remembered.

FIG. 3 shows an example of the data communication amount table 11a.
As shown in FIG. 3, the data communication amount table 11a indicates that the data communication amount (for example, d1) when each relay device performs wireless communication between the wireless terminal device and the detection unit time T is the detection unit time T. This is a data traffic volume information group including a plurality (for example, the number of relay devices) of data traffic volume information (for example, D1) that is acquired in a plurality of times.

  In the name column shown in FIG. 3, the names of the relay devices (AP0, AP1, AP2, AP3,...) Are shown. Along with the name of this relay device, the number of the wireless communication channel of each relay device and the number of wireless terminal devices that perform predetermined wireless communication are shown. For example, the AP2 relay device has a wireless communication channel number of 18 and is connected to 30 wireless terminal devices.

In addition, in the column of detection times shown in FIG. 3, the times when the data communication amount is detected are shown.
The latest detection time is nT, and the detection time detected in the detection unit time T immediately before the detection unit time T of the latest detection time is indicated as (n−1) T. T represents the detection unit time. In FIG. 3, for example, it is indicated that the data communication amount per detection unit time T of the relay apparatus of AP2 at the detection time nT is 100.

FIG. 4 shows an example of the throughput guideline table 11b.
As shown in FIG. 4, the throughput guide table 11b is a data process in which a plurality of reference values (for example, d2) of the data processing speed (throughput) of the detection unit time T of each wireless communication channel are acquired for each detection unit time T. This is a data processing speed information group including a plurality of speed information (for example, D2) (the number of wireless communication channels).
In the present embodiment, it is assumed that an area for storing a reference value of throughput for each detection time of each wireless communication channel is secured in the storage unit 11, and a throughput guide table is formed by each area. .

The channel No. column shown in FIG. 4 shows a number for identifying each wireless communication channel. In this embodiment, the case where the total number of wireless communication channels is 16 will be described.
Further, in the column of detection times shown in FIG. 4, the times when the throughput is detected are shown. The latest detection time is nT, and the detection time detected in the detection unit time T immediately before the detection unit time T of the latest detection time is indicated as (n−1) T. T represents the detection unit time.

The reference values of throughput shown in FIG. 4 are divided into five ranges of 0 to 4.
For example, when the throughput is less than 50 [kbps], 0, 50 [kbps] or more and 90 not yet [kbps], 1 or 90 [kbps] or more and less than 130 [kbps], 2, 130 [kbps]. The throughput is pre-classified into five values, such as 3 if it is greater than kbps and less than 170 kbps, and 4 if it is greater than 170 [kbps].
In FIG. 4, for example, it is shown that the throughput of the wireless communication channel 18 when the number of detection times is nT is a range set to 0 (less than 50 [kbps]).

  This throughput is known to decrease due to radio wave conditions such as the influence of interference waves, and it is determined that the radio wave channel with a lower throughput has a poor radio wave condition.

  The display unit 12 includes an LCD (Liquid Crystal Display), an EL (Electro Luminescence) display, and the like, and displays various screens according to signals input from the control unit 10.

  The operation unit 13 includes a keyboard having various input keys such as a numeric keypad and a character input key, a pointing device such as a mouse that receives input of position information, and the like, and is input to the key input information input from the keyboard or the pointing device. The obtained position information is output to the control unit 10 as operation information.

  The communication unit 14 is configured by a network card or the like, and transmits / receives information to / from the relay device 2 and the monitor device 4 on the communication network N.

FIG. 5 shows a schematic configuration diagram of the relay device 2.
As shown in FIG. 5, the relay device 2 includes a control unit 20, a storage unit 21, a terminal information memory 22, a wireless transmission unit 23, a wireless reception unit 24, a SW (switching unit) 25, a wired I / F (InterFace). The unit 26, the buffer 27, the antenna 28, etc. are provided, and each unit is electrically connected.

  The control unit 20 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The control unit 20 reads the specified programs, tables, and data from the various programs, various tables, and data stored in the storage unit 21 and the terminal information memory 22, and stores them in the RAM or the work area of the storage unit 21. Expands and executes various processes in cooperation with the above programs, stores the processing results in the RAM or a predetermined area of the storage unit 21 or the terminal information memory 22, and instructs each unit in the relay apparatus 2 Thus, the overall operation of the relay device 2 is comprehensively controlled.

Further, the control unit 20 reads the channel change processing program and various data stored in the ROM or the storage unit 21 and executes the channel change processing.
In the channel change process, when the throughput with the wireless terminal device connected to itself is equal to or less than a preset threshold value, a communication status deterioration notification is transmitted to the management device. Further, the wireless communication channel is changed based on the channel information received from the management device.

  The storage unit 21 is composed of a magnetic or optical recording medium or a non-volatile memory that can be electrically erased and rewritten, such as a semiconductor. The storage unit 21 is fixedly attached to the relay device 2 or is detachably mounted. It is what is done. For example, FeRAM (Ferroelectric Random Access Memory), MRAM (Magneto resistive Random Access Memory), OUM (phase change recording memory by chalcogenide alloy), etc. can be mentioned. The storage unit 21 stores in advance various programs executed by the control unit 20, a channel change processing program, and various tables and data used in these programs.

  The terminal information memory 22 is composed of a memory that can be electrically erased and rewritten. The terminal information memory 22 stores information such as the node address of the wireless terminal device 3 existing in the communicable area of the relay device 2 for each wireless terminal device.

  The wireless transmission unit 23 includes a modulation circuit, an RF (Radio Frequency) circuit, and the like, adjusts the transmission power of the packet, encodes data to be transmitted in accordance with an instruction from the control unit 20, and transmits the packet. The packet is modulated, and the packet is transmitted to the wireless terminal device 3 via the antenna 28.

  The wireless receiving unit 24 includes a demodulation circuit, an RF circuit, and the like, and is obtained by adjusting the reception sensitivity of the packet, demodulating the packet received via the antenna 28, and analyzing the demodulated packet. The data is output to the control unit 20.

  The SW 25 is provided between the antenna 28 and the wireless transmission unit 23 or the wireless reception unit 24. According to an instruction from the control unit 20, the SW 25 transmits a packet from the wireless transmission unit 23 or receives a packet from the antenna 28. Switch.

  The wired I / F 26 performs communication control for communicating with the management device 1 or other relay device 2 connected via the communication network N by a predetermined communication method.

  The buffer 27 temporarily stores data received via the wired I / F 26.

  The antenna 28 transmits a packet according to the set transmission power or receives a packet according to the set reception sensitivity.

FIG. 6 shows a schematic configuration diagram of the monitor device 4.
As shown in FIG. 6, the monitor device 4 includes a control unit 40, a storage unit 41, an operation display unit 42, an RF (Radio Frequency) unit 43, a communication unit 44, and the like, and each unit is electrically connected.

  The control unit 40 includes a CPU, a ROM, a RAM, and the like, reads out various programs stored in the storage unit 41, various programs and tables and data specified from various tables and data, and stores them in the RAM or the storage unit 41. In the work area, execute various processes in cooperation with the program, store the processing results in a predetermined area of the RAM or the storage unit 41, and instruct each unit in the monitor device 4 to monitor The overall operation of the device 4 is comprehensively controlled.

  The control unit 40 reads the throughput guide data transmission processing program and various data stored in the ROM or the storage unit 41, and executes the throughput guide data transmission processing. In the throughput guide data transmission process, the RF unit 43 scans the electric field strength of each wireless channel. Then, the electric field intensity of each scanned radio communication channel is converted into a throughput, and the converted throughput of each radio communication channel is converted into a preset reference value of throughput. Thereafter, a guideline value of the throughput of each wireless communication channel is transmitted to the management apparatus 1.

  The storage unit 41 is composed of a magnetic or optical recording medium or a non-volatile memory that can be electrically erased and rewritten, such as a semiconductor. The storage unit 41 is fixedly attached to the monitor device 4 or is detachably mounted. It is what is done. The storage unit 41 stores in advance various programs executed by the control unit 40, various tables used in these programs, an electric field strength-throughput conversion table 41a, various data, and the like. Further, the storage unit 41 stores an electric field strength table 41b generated when the throughput guideline transmission process is executed.

FIG. 7 shows an example of the electric field strength-throughput conversion table 41a.
As shown in FIG. 7, the electric field strength-throughput conversion table 41 a includes each electric field strength range, a throughput range corresponding to each electric field strength range, and a reference value indicating each throughput range.
In FIG. 7, for example, when the electric field strength is 120 or more, the throughput is less than 50, and the reference value indicating that the throughput is less than 50 is 0.

FIG. 8 shows an example of the electric field strength table 41b.
As shown in FIG. 8, the electric field strength table 41b includes information on the electric field strength of the detection unit time T of each wireless communication channel for each detection unit time T.
In the present embodiment, it is assumed that an area for storing the electric field intensity at each detection time of each wireless communication channel is secured in the storage unit 41, and an electric field intensity table is formed by each area.

  The channel numbers and detection times shown in FIG. 8 are the same as the throughput guide table in FIG. FIG. 8 shows that the electric field strength of the wireless communication channel 18 is 150 when the detection time is nT, for example.

  The operation display unit 42 includes an LCD (Liquid Crystal Display), an ELD (ElectroLuminescent Display), and various keys. The operation display unit 42 performs display according to a display control signal input from the control unit 40 and controls operation signals received by the various keys. To the unit 40.

  The RF unit 43 includes an antenna and the like, measures the electric field strength of a wireless communication channel within a preset communication distance (for example, a radius of about 50 m in IEEE 802.15.4) around the monitor device 4, and The measurement data is output to the control unit 40.

  The communication unit 44 is configured by a network card or the like, and transmits and receives information to and from the management device 1 on the communication network N.

Next, the operation of the present embodiment will be described with reference to FIGS.
FIG. 9 shows a flowchart of the data traffic volume table generation process executed in the management apparatus 1. The process shown in FIG. 6 is executed by the cooperation of the control unit 10 and each unit in the management apparatus 1 and is executed while power is being supplied to the management apparatus 1.

  In the present embodiment, a case where four AP0 to AP3 relay apparatuses are connected to the management apparatus 1 will be described. Further, an explanation will be given by using an example in which the data communication amount detected in the past five times in the storage unit 11 is information included in the data communication amount table.

In the storage unit 11 of the present embodiment, it is assumed that five areas (for example, registers) for storing the data communication amount per detection unit time T are secured for each relay device.
For example, the area for storing the data communication amount of the latest detection time nT of the relay device of AP0 is Data0 [0], and the area for storing the data communication amount of the previous detection time (n−1) T is Data0 [1]. ],..., The area for storing the data communication volume of the previous detection time (n-4) T is Data0 [4]. Similarly, the area for storing the data traffic of the latest detection times nT of the relay devices of AP1, AP2, and AP3 is defined as Data1 [0], Data2 [0], Data3 [0], and the previous detection times (n− 1) Data 1 [1], Data2 [1], Data3 [1],..., The data traffic for the previous four detection times (n-4) are stored in the area for storing the data traffic for T. The areas are Data1 [4], Data2 [4], and Data3 [4].

  The control unit 10 initializes (sets to 0) an area for storing the data communication amount per detection unit time T for each detection time of each relay device in the storage unit 11 (step S1).

  The control unit 10 determines whether there is data to be transmitted by any of the relay devices (step S2). If there is no data to be transmitted (step S2; NO), the control unit 10 proceeds to the process of step S10.

  When there is data to be transmitted (step S2; YES), the control unit 10 determines whether the data is to be transmitted by the AP0 relay device (step S3). When the data is to be transmitted by the wireless terminal device of AP0 (step S3; YES), after confirming that the wireless terminal device of AP0 has transmitted the data, the control unit 10 sets the data amount of the data to Data0 [ 0] (step S4).

  If the AP0 wireless terminal device is not the data to be transmitted (step S3; NO), it is determined whether the AP1 relay device is the data to be transmitted (step S5). If the wireless terminal device of AP1 is data to be transmitted (step S5; YES), the control unit 10 confirms that the wireless terminal device of AP1 has transmitted the data, and then sets the data amount of the data to Data1 [ 0] (step S6).

  If the wireless terminal device of AP1 is not the data to be transmitted (step S5; NO), it is determined whether the data is to be transmitted by the relay device of AP2 (step S7). If the data is to be transmitted by the wireless terminal device of AP2 (step S7; YES), the control unit 10 confirms that the wireless terminal device of AP2 has transmitted the data, and then sets the data amount of the data to Data2 [ 0] (step S8).

  When the wireless terminal device of AP2 is not data to be transmitted (step S7; NO), the control unit 10 determines that the data is to be transmitted by the relay device of AP3, and the wireless terminal device of AP3 transmits the data. After confirming this, the data amount of the data is added to Data3 [0] (step S9).

  After step S2, step S4, step S6, step S8 or step S9, the control unit 10 determines whether or not the detection unit time T has elapsed from step S2 (step S10). When the detection unit time T has not elapsed (step S10; NO), the control unit 10 returns to the process of step S2. Therefore, if data is transmitted a plurality of times while the detection unit time T has elapsed, each time data is transmitted, the data communication amount transmitted to the area for storing the data communication amount of any relay device is added. Will be.

  When the detection unit time T has elapsed (step S10; YES), the data communication amount of each relay device for each detection time is shifted as the data communication amount for the previous detection time (step S11). Further, the control unit 10 initializes an area in which the latest data communication amount of each relay device is stored (step S12), and returns to the process of step S2.

  Step S10: After YES, Data0 [0] to Data3 [0] include data traffic of the relay devices AP0 to AP3 (20, 0, FIG. 3) in the latest detection times (nT in FIG. 3). 100, 300) are stored.

  Further, Data0 [1] has a data communication amount of the detection time immediately before the relay device of AP0 ((n-1) T in FIG. 3), and Data0 [2] has a data traffic of two before the relay device of AP0. Data communication amount of detection times ((n-2) T in FIG. 3), Data0 [3] includes data communication amounts of detection times three times before the relay device of AP0 ((n-3) T in FIG. 3) , Data0 [4] stores the data communication amount four times before the AP0 relay device ((n-4) T in FIG. 3). The data communication amount of each detection time of the relay devices AP1 to AP3 is also stored in the same manner as the AP0 relay device.

In step S11, the latest detected data traffic of the relay device of AP0 stored in Data0 [0] is moved and stored in Data0 [1]. In Data0 [2], the data communication amount of the detection time immediately before the relay device of AP0 stored in Data0 [1] is moved and stored. In Data0 [3], the data communication amount of the detection time two times before the AP0 relay device stored in Data0 [2] is moved and stored. In Data0 [4], the data communication amount of the detection times three times before the relay device of AP0 stored in Data0 [3] is moved and stored. Then, the data communication amount of the detection time four times before the relay device of AP0 stored in Data0 [4] is discarded.
The data communication amount of each detection time of the relay devices AP1 to AP3 is also shifted in the same manner as the AP0 relay device.

  In step S12, the values stored in Data0 [0] to Data3 [0] are initialized (set to 0), and the data communication amount of the latest detection time of each relay device is initialized to 0.

  FIG. 10 shows a flowchart of throughput guide data transmission processing executed in the monitor device 4. Note that the processing shown in FIG. 10 is executed by cooperation between the control unit 40 and each unit in the monitor device 4 and is repeatedly executed while power is supplied to the monitor device 4. .

  The control unit 40 determines whether or not the detection unit time T has elapsed from a preset timing (step S21). If the detection unit time T has not elapsed (step S21; NO), the process ends. To do.

  When the detection unit time T has elapsed (step S21; YES), the control unit 40 causes the RF unit 43 to scan the electric field strengths of all wireless communication channels (step S22). In step S22, the electric field strength of each wireless communication channel is obtained with a value of 0-255. The larger the electric field strength value is, the more data to be transmitted is, and the data communication is congested (communication speed is reduced), and when the electric field intensity is 0, the data communication is most vacant (communication speed Is high).

  The control unit 40 shifts the electric field strength of each detection time of each wireless communication channel in the electric field strength table stored in the storage unit 41 to an area in which the electric field strength of the previous detection time is stored. Then, the electric field strength of each wireless communication channel obtained by scanning in step S22 is stored as the latest detection time (nT in FIG. 8). Further, the control unit 40 converts the electric field strength of each wireless communication channel into a reference value of throughput based on the electric field strength-throughput conversion table (step S23).

  The control unit 40 causes the communication unit 44 to transmit to the management device 1 the data (converted data) of the throughput value of each wireless communication channel converted in step S23 (step S24), and ends this process.

  FIG. 11 shows a flowchart of throughput guide table generation processing executed in the management apparatus 1. Note that the processing shown in FIG. 11 is executed by the cooperation of the control unit 10 and each unit in the management apparatus 1, and steps S32 to S34 are repeatedly executed while power is supplied to the management apparatus 1. It is what is done.

  The control unit 10 initializes a storage area for the reference value of the throughput of all detection times of all the wireless communication channels (step S31). In step S31, for example, all the detection times (nT, (n-1) T, (n-2) T, (n-3) T, (n -4) The reference value of the throughput of T) is set to 0.

  The control unit 10 determines whether or not conversion data has been received from the monitor device 4 (step S32). When conversion data is not received from the monitor apparatus 4 (step S32; NO), the control part 10 complete | finishes this process.

When conversion data is received from the monitor device 4 (step S32; YES), a storage area (CP [i] [0] (i = wireless communication channel, i) for the latest detected throughput of each wireless communication channel. = 0 to 15)), the received conversion data is stored (step S33).
That is, in step S33, the received conversion data is stored as a guideline value of the throughput of the latest detection times (nT) of all wireless communication channels (channel Nos. 11 to 26) shown in FIG.

  After step S33, the control unit 10 stores each element of each radio communication channel CP [i] (that is, the estimated value of the throughput of each detection time) and the estimated value of the throughput of the previous detection time. The region is shifted (step S34), and this process is terminated.

  FIG. 12 shows a flowchart of channel setting change processing executed in the management apparatus 1. The process shown in FIG. 12 is executed by the cooperation of the control unit 10 and each unit in the management apparatus 1.

  The controller 10 determines whether or not a communication status deterioration notification has been received from any of the relay devices (step S41). When the communication status deterioration notification has not been received (step S41; NO), the control unit 10 returns to the process of step S41.

  When the communication condition deterioration communication is received (step S41; YES), the control unit 10 executes the priority setting process of the relay device (step S42). In the priority order setting process in step S42, the priority order of the relay apparatus is set according to a preset policy out of the three policies described above based on the data traffic volume table 11a.

  For example, when the priority order is set based on the number of wireless terminals with which each relay device performs wireless communication, the data communication amount table 11a is referred to, and the priority of the relay devices is increased in descending order of the number of connected wireless terminals. The ranking is set higher.

  For example, when the priority order is set based on the moving average value of the data communication amount of each relay device, the data communication amount table 11a is referred to, and the moving average value of the latest detection times nT is determined in each relay device. Calculated using Equation 1 below. Then, the priority order of the relay devices is set higher in the order of the calculated moving average value.

Ｎ；移動平均値を算出する際に用いるデータ通信量の検出回数（例えば、Ｎ＝５）
Ｐ（ｃ，ｎＴ）；中継装置ｃの最新の検出回ｎＴの移動平均値
ｐ（ｃ，ｎＴ）；中継装置ｃの最新の検出回ｎＴのデータ通信量
ｐ（ｃ，ｎＴ）；中継装置ｃの１つ前の検出回（ｎ−１）Ｔのデータ通信量
・・・
ｐ（ｃ，（ｎ−（Ｎ−１））Ｔ）；中継装置ｃのＮ−１前の検出回（ｎ−（Ｎ−１））Ｔのデータ通信量

N: Number of times of detection of data traffic used when calculating the moving average value (for example, N = 5)
P (c, nT); moving average value of latest detection times nT of relay device c p (c, nT); data traffic of latest detection times nT of relay device c p (c, nT); relay device c Data traffic of detection times (n-1) T one before
p (c, (n− (N−1)) T); data communication amount of detection times (n− (N−1)) T before N−1 of the relay device c

  For example, when the priority is set based on the exponent-weighted moving average value of the data communication amount of each relay device, the data traffic amount table 11a is referred to, and the exponential weight of the latest detected number nT is determined in each relay device. The moving average value is calculated using Equation 2 below. Then, the priority order of the relay devices is set higher in the order of the calculated exponent-weighted moving average value.

０＜α＜１
Ｐ（ｃ，ｎＴ）；中継装置ｃの最新の検出回ｎＴの指数加重移動平均値
ｐ（ｃ，ｎＴ）；中継装置ｃの最新の検出回ｎＴのデータ通信量
Ｐ（ｃ，（ｎ−１）Ｔ）；中継装置ｃの１つ前の検出回（ｎ−１）Ｔの指数加重移動平均値

0 <α <1
P (c, nT): Exponentially weighted moving average value of the latest detection times nT of the relay device c p (c, nT); Data traffic of the latest detection times nT of the relay device c P (c, (n−1) ) T); Exponentially weighted moving average value of detection times (n-1) T immediately before relay device c

  After step S42, the control unit 10 executes a priority setting process for the wireless communication channel (step S43). In the wireless communication channel priority setting process in step S43, the wireless communication channel priority is set based on the throughput guide table 11b.

  In step S43, for example, the priority order of the wireless communication channels is set higher in descending order of the estimated throughput value. If there are a plurality of wireless communication channels having the same throughput standard value, the throughput or electric field strength before the conversion to the throughput standard value is acquired from the monitor device 4, and the order of the highest throughput or the electric field strength is obtained. The order of priority is set higher in order of priority.

  After setting the priority order of the relay device and the priority order of the wireless communication channel (after step S42 and step S43), the control unit 10 executes a channel assignment process for allocating a wireless communication channel with a higher priority order from the relay device with a higher priority order. (Step S44).

  After step S44, the control unit 10 executes a process of transmitting a channel change notification for notifying the wireless communication channel assigned in step S44 to all relay apparatuses (step S45), and ends this process.

  FIG. 13 shows a flowchart of channel change processing executed in the relay apparatus 2. Note that the processing shown in FIG. 13 is executed by the cooperation of the control unit 20 and each unit in the relay apparatus 2.

  The control unit 20 determines whether or not a channel change notification has been received from the management device 1 (step S51). When the channel change notification has not been received (step S51; NO), the control unit 20 determines whether or not its own throughput is equal to or less than a preset threshold value (step S52).

  When the own throughput is not less than or equal to the preset threshold value (step S52; NO), the control unit 20 returns to the process of step S51. When the own throughput is equal to or lower than a preset threshold (step S52; YES), the control unit 20 transmits a communication status deterioration notification to the management apparatus 1 (step S53), and returns to the process of step S51.

  When the channel change notification is received (step S51; YES), the control unit 20 analyzes the channel change notification and acquires information on the newly assigned wireless communication channel (step S54). Based on the information, its own wireless communication channel is changed (step S55), and this process ends.

  As described above, according to the present embodiment, in order from the relay device with the highest priority set based on the data communication amount table including the data communication amount of each relay device and the number of wireless terminal devices, Since a high-priority wireless communication channel set based on the throughput guide table is set, a wireless communication channel can be assigned according to the operation status of each relay device. Therefore, the operational efficiency of the wireless communication system can be improved.

  In particular, information on the amount of data communication for each detection unit time is included in the data communication amount table for each relay device, and a guide value for throughput for each detection unit time is included in the throughput guide table for each wireless communication channel. Therefore, the priority order of the relay device can be set based on the data communication amount per detection unit time, and the priority order of the wireless communication channel can be set based on the throughput per detection unit time.

  Furthermore, as a policy for setting the priority order of the relay devices, the priority order of the relay devices can be set higher in the order in which the number of wireless terminal devices with which each relay device performs wireless communication is larger. Therefore, the wireless communication channel can be set according to the operation status of the relay device.

  Further, as a measure for setting the priority order of the relay device, the priority order of the relay device can be set higher in descending order of the moving average value of the data communication amount. Therefore, a wireless communication channel can be set according to the recent trend of data communication amount of the relay device.

  Further, as a policy for setting the priority order of the relay device, the priority order of the relay device can be set higher in the order of the exponent-weighted moving average value of the data communication amount. Therefore, it is possible to set a wireless communication channel that emphasizes a new data communication amount according to the recent trend of data communication amount of the relay device weighted exponentially.

DESCRIPTION OF SYMBOLS 1 Management apparatus 2 Relay apparatus 3 Wireless terminal apparatus 4 Monitor apparatus 10 Control part 11 Storage part 11a Data communication amount table 11b Throughput guide table 12 Display part 13 Operation part 14 Communication part 20 Control part 21 Storage part 22 Memory for terminal information 23 Wireless Transmitter 24 Wireless receiver 25 SW
26 Wired I / F unit 27 Buffer 28 Antenna 40 Control unit 41 Storage unit 41a Electric field intensity-throughput conversion table 41b Electric field intensity table 42 Operation display unit 43 RF unit 44 Communication unit A Wireless communication system N Communication network

Claims (6)

In a management device that manages a plurality of relay devices that perform wireless communication with a plurality of wireless terminal devices,
A communication unit for communicating with the relay device;
A data traffic information group including information on the data traffic of each of the relay devices and information on the number of the wireless terminal devices with which the wireless communication of each of the relay devices is performed, and a plurality of data used for wireless communication with the wireless terminal devices A data processing speed information group including data processing speed information for each wireless communication channel;
When receiving information indicating that the data processing speed is equal to or lower than a preset threshold value from the relay apparatus, the priority order of the relay apparatus is set based on the data traffic information group, and the data processing speed is set. The priority order of the wireless communication channel is set based on the information group, the wireless communication channel with the higher priority order is set in order from the relay device with the higher priority order, and the wireless communication channels set for all the relay devices are set. A control unit that controls to notify,
A management apparatus characterized by comprising: The data traffic information group includes
A plurality of pieces of data communication amount information in which a plurality of pieces of data communication amount information obtained by the relay device performing wireless communication with the wireless terminal device during a unit time are included per unit time;
The data processing speed information group includes
A plurality of data processing speed information obtained by acquiring a plurality of data processing speed information of the wireless communication channel for each unit time per unit time;
The management apparatus according to claim 1. The controller is
When setting the priority of the relay device,
Setting the priority of the relay device higher in order of increasing number of the wireless terminal devices performing wireless communication;
The management device according to claim 1, wherein: The controller is
Calculating a moving average value of the data communication amount of each of the relay devices, and setting a higher priority order of the relay devices in order of the calculated moving average value;
The management device according to claim 1, wherein: The controller is
Calculating the exponent-weighted moving average value of the data traffic of each of the relay devices, and setting the priority of the relay device higher in order of the calculated exponent-weighted moving average value;
The management device according to claim 1, wherein: A computer that manages a plurality of relay devices that perform wireless communication with a plurality of wireless terminal devices;
A communication means for communicating with the relay device;
When the information indicating that the data processing speed is equal to or lower than a preset threshold is received from the relay device, the data communication amount information of each of the relay devices and the wireless communication in which each of the relay devices is performed The priority order of the relay device is set based on a data communication amount information group including information on the number of terminal devices, and includes information on data processing speeds of a plurality of wireless communication channels used for wireless communication with the wireless terminal device. The priority of the wireless communication channel is set based on the data processing speed information group, the wireless communication channel with the higher priority is set in order from the relay device with the higher priority, and the wireless set for all the relay devices Control means for controlling to notify the communication channel;
Program to function as.

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