JP6506190B2 - Wireless communication system, control method and control station apparatus - Google Patents

Description

  The present invention relates to a wireless communication system, a control method, and a control station apparatus.

  Wireless LANs are widely used as a means for high-speed data transfer, and with the spread of the methods, the number of shipments of terminal devices equipped with communication functions by wireless LANs has increased, and traffic via wireless LANs has also increased. Furthermore, there are also scenes where wireless LANs are used in a situation where a very large number of terminal devices are densely present in a limited area such as a stadium or event space. The wireless LAN uses CSMA / CA (Carrier Sense Multiple Access / Collision Avoidance) as a multiple access method, so there is a problem that the throughput decreases when the number of terminal devices and traffic increase. 1).

  On the other hand, in the wireless LAN, it has been reported that the 60 GHz band is newly used in addition to the conventionally used 2.4 GHz band and 5 GHz band. The communication distance is different between a conventional wireless LAN using a 2.4 GHz band or a 5 GHz band and a wireless LAN using a 60 GHz band (hereinafter referred to as millimeter wave radio). Generally, in a conventional wireless LAN using a 2.4 GHz band or 5 GHz band, a communication range is up to about 100 m, whereas in a millimeter wave radio using a 60 GHz band, a communication range up to about 10 m. Thus, the millimeter wave radio using the 60 GHz band has a shorter communication distance than the conventional wireless LAN (Non-Patent Document 2). In addition, millimeter wave radio consumes more power than conventional wireless LANs. For this reason, techniques for switching between and using conventional wireless LAN and millimeter wave radio are being considered.

  One of the technologies under consideration is FST (Fast Session Transfer) standardized by IEEE 802.11ad (Non-Patent Document 3). The technology described in Non-Patent Document 3 is a technology for performing switching between a conventional wireless LAN and millimeter-wave radio without making switching to a layer higher than IP aware by virtualizing in the MAC layer. Another technique is to use a radio wave of a wireless LAN to estimate the millimeter wave radio communication area of the base station apparatus, and to switch from the wireless LAN to the millimeter wave radio (non-patent document 4). Each of these techniques is a technique in which a terminal device takes the initiative in switching between wireless LAN and millimeter wave radio.

Morikura Masahiro (Supervised), Kubota Shuji (Supervised), "Impress Standard Textbook Series Revised Three Edition 802.11 High-speed Wireless LAN Textbook", Impre R & D, March 2008 "A series of short-range high-speed data communication standards announced at 60 GHz", July 2009, [online], Institute for Science and Technology Policy, [search on February 2, 2016], Internet <URL: http: //data.nistep.go.jp/dspace/bitstream/11035/2054/1/NISTEP-STT100-6.pdf> SaiShankar N, Debashis Dash, Hassan El Madi, and Guru Gopalakrishnan, "WiGig and IEEE802.11ad For Multi-Gigabyte-Per-Second WPAN and WLAN", ZTE Communications, vol. 10, no. 4, pp. 13-22, 2012 Sho Wada, Satoshi Saito, Satoshi Ono, Masahiro Umehira, Shigeki Takeda, "Milliwave band WLAN communication area estimation method by microwave band", March 2013, [online], The Institute of Electronics, Information and Communication Engineers, [2016 2] Search 2nd month], Internet <URL: http://www.ieice.org/tokyo/gakusei/kenkyuu/18/pdf/63.pdf>

  A communication device that configures a network combining a wireless LAN and millimeter wave radio, and that is a terminal device to which the above-described technology is applied, and that primarily switches between the wireless LAN and the millimeter wave radio is a communication area of the millimeter wave wireless In the case where there are a plurality of terminals, all the terminals in the communication area may communicate by millimeter wave radio. In such a case, traffic may increase due to the use of millimeter wave wireless terminals of a plurality of terminals, and throughput may not be improved.

  In view of the above-mentioned circumstances, the present invention aims to provide a wireless communication system, a control method and a control station apparatus capable of improving the throughput in a network to which different wireless communication systems are applied.

  One aspect of the present invention is a first base station apparatus that performs wireless communication using a first wireless mode with a plurality of terminal devices, and a communication speed is faster and the communication distance is shorter than the first wireless mode. A plurality of second base station apparatuses performing radio communication with the terminal apparatus using the second radio mode, and a control station apparatus that switches whether or not the second base station apparatus performs radio communication In the communication system, the control station apparatus may further include a monitoring unit configured to acquire a use status of wireless communication of the terminal apparatus via the first base station apparatus, and the plurality of second ones based on the use status. A control unit that selects the second base station apparatus that performs wireless communication with the terminal apparatus among the base station apparatuses, and causes the selected second base station apparatus to start wireless communication with the terminal apparatus; , And wireless using the second wireless mode It said terminal device capable of performing signal are determined for each of the second base station apparatus, a wireless communication system.

  Further, according to one aspect of the present invention, in the above-described wireless communication system, the control unit causes the predetermined number of second base station apparatuses to receive the predetermined value when the determination value indicating the usage state becomes equal to or more than a predetermined threshold The wireless communication with the terminal device is started, and when the determination value becomes less than the threshold value, the predetermined number of second base station devices are stopped.

  Further, according to one aspect of the present invention, in the wireless communication system described above, two or more second base station apparatuses exist within a communication distance of the first base station apparatus, and the first base The utilization state of the wireless communication of the terminal apparatus via the station apparatus is a moving average of traffic via the first base station apparatus, and the control unit is configured to determine a plurality of the moving averages of the traffic. Wireless communication with the terminal apparatus in the second base station apparatus existing within the communication range of the first base station apparatus based on which of the classes in which the moving average of the current traffic is included The ratio of the second base station apparatus to be started is determined.

  Further, according to one aspect of the present invention, in the above-described wireless communication system, the control unit determines which of the first base station apparatus and the second base station apparatus is based on a communication counterpart of the terminal apparatus. When it is determined whether the terminal apparatus is to perform communication with the communication partner via the second base station apparatus and the terminal apparatus is to perform communication with the communication partner via the second base station apparatus, the terminal apparatus and the wireless communication The second base station apparatus capable of communication is caused to start wireless communication.

  Further, according to one aspect of the present invention, in the above-described wireless communication system, the control unit is configured to set the first base station apparatus and the second base station apparatus based on a data size of communication by the terminal apparatus. When it is determined via which the terminal apparatus is to perform communication with the communication partner, and the terminal apparatus is caused to perform communication with the communication partner via the second base station apparatus, the terminal apparatus The second base station apparatus capable of wireless communication can start wireless communication.

  Further, according to one aspect of the present invention, in the above-described wireless communication system, when the control unit selects the second base station apparatus that starts wireless communication with the terminal apparatus, the second base station apparatus The second base station apparatus is selected so as to smooth the variation of the accumulated time in which each performs wireless communication.

  Further, according to one aspect of the present invention, there is provided a first base station apparatus which performs wireless communication using a first wireless mode with a plurality of terminal devices, and a communication speed and communication distance faster than the first wireless mode. A plurality of second base station apparatuses performing radio communication using a short second radio mode with the terminal apparatus, and a control station apparatus for switching whether or not the second base station apparatus performs radio communication A control method in a wireless communication system, comprising: a monitoring step in which the control station apparatus acquires a use state of wireless communication of the terminal apparatus via the first base station apparatus; and the control station apparatus The second base station apparatus for performing wireless communication with the terminal apparatus is selected from the plurality of second base station apparatuses based on the usage status, and the selected second base station apparatus is selected as the terminal Control to start wireless communication with the device Has a step, a second of the terminal apparatus capable of performing wireless communication using a wireless mode is defined for each said second base station apparatus, a control method.

  Further, according to one aspect of the present invention, there is provided a first base station apparatus which performs wireless communication using a first wireless mode with a plurality of terminal devices, and a communication speed and communication distance faster than the first wireless mode. A plurality of second base station apparatuses performing radio communication using a short second radio mode with the terminal apparatus, and a control station apparatus for switching whether or not the second base station apparatus performs radio communication A control station apparatus in a wireless communication system, comprising: a monitoring unit that acquires a use status of wireless communication of the terminal apparatus via the first base station apparatus; and the plurality of second based on the use status. A control unit that selects the second base station apparatus that performs wireless communication with the terminal apparatus among the base station apparatuses, and causes the selected second base station apparatus to start wireless communication with the terminal apparatus; , And using the second wireless mode The terminal device capable of performing wireless communication are defined for each of the second base station apparatus is a control station apparatus.

  According to the present invention, throughput can be improved in a network to which different wireless communication schemes are applied.

FIG. 1 is a block diagram showing a configuration example of a wireless communication system according to the present embodiment. The figure which shows the structural example of the radio | wireless cell in the radio | wireless communications system of this embodiment. The block diagram showing the example of composition of the terminal unit in this embodiment. The flowchart which shows the switching process of the wireless mode in, when the terminal device is not carrying out wireless communication. The flowchart which shows the switching process of the radio mode in, when the terminal device is performing radio | wireless communication in 1st radio | wireless mode. The flowchart which shows the switching process of the radio mode in, when the terminal device is performing radio | wireless communication in 2nd radio | wireless mode. FIG. 2 is a block diagram showing a configuration example of a control station device 1 in the present embodiment. The figure which shows the period which a monitoring part calculates the average value regarding a utilization condition. The figure which shows an example of the communicating party list which a communicating party information storage part memorize | stores. The figure which shows an example of the terminal table which a terminal information storage part memorize | stores. The flowchart which shows the switch process according to the utilization condition which a control station apparatus performs. The flowchart which shows the passage permission process which a control station apparatus performs. The flowchart which shows the stop processing which a control station apparatus performs after passage permission processing. FIG. 13 is a sequence diagram showing an operation of the wireless communication system when the passage permission process shown in FIG. 12 is performed. The flowchart which shows the passage permission process which a control station apparatus performs. FIG. 16 is a sequence diagram showing an operation of the wireless communication system when the passage permission process shown in FIG. 15 is performed.

  Hereinafter, a wireless communication system, a control method, and a control station apparatus according to an embodiment of the present invention will be described with reference to the drawings. In the following embodiments, components given the same reference numerals perform similar operations, and redundant description will be omitted as appropriate.

  FIG. 1 is a block diagram showing a configuration example of a wireless communication system according to the present embodiment. The wireless communication system according to the present embodiment includes a control station device 1, a plurality of first base station devices 2, and a plurality of second base station devices 3. The control station apparatus 1 is connected to the first base station apparatus 2 and the second base station apparatus 3 via a wired line or a wireless line in a communicable manner. The control station apparatus 1 is connected to an external network such as the Internet. The control station apparatus 1, the first base station apparatus 2, and the second base station apparatus 3 relay communication between an external network and the terminal apparatus 4 and communication between the terminal apparatuses 4.

  The first base station device 2 and the second base station device 3 wirelessly communicate with one or more terminal devices 4. The first wireless mode (wireless communication method) is used for wireless communication between the first base station apparatus 2 and the terminal device 4. The second wireless mode is used for wireless communication between the second base station device 3 and the terminal device 4. The second wireless mode has a faster communication speed and a shorter communication distance than the first wireless mode. For example, a first wireless mode may use a wireless LAN using CSMA / CA as a multiple access technique, and a second wireless mode may use millimeter wave wireless using TDM as a multiple access technique. The millimeter wave radio is characterized in that the transmission speed is high but the size of the radio cell is small and the power consumption is large compared to the wireless LAN. Here, the wireless cell is an area within a communicable distance range, for example, an area within a circle whose radius is a communicable distance centered on the device.

  In the wireless communication system according to the present embodiment, the second wireless communication is performed based on the status of wireless communication (hereinafter referred to as a usage status) in the first base station apparatus 2 and the terminal device 4 using the first wireless mode. The start and stop of wireless communication in the second base station apparatus 3 and the terminal apparatus 4 using the mode are controlled. Further, the terminal devices 4 that can perform wireless communication using the second wireless mode are restricted for each second base station device 3. As a result, despite the switching from the first wireless mode to the second wireless mode, it is suppressed that the traffic of the wireless communication using the second wireless mode significantly increases and the throughput decreases, Improve throughput throughout the system. Hereinafter, the wireless communication system of the present embodiment will be described in more detail.

  FIG. 2 is a diagram showing a configuration example of a wireless cell in the wireless communication system of the present embodiment. The wireless cell of the first base station device 2 that performs wireless communication in the first wireless mode is wider than the wireless cell of the second base station device 3 that performs wireless communication in the second wireless mode. The plurality of second base station devices 3 are disposed in the wireless cell of the first base station device 2. As shown in FIG. 2, the wireless cells of the plurality of second base station devices 3 uniformly cover the inside of the wireless cell of the first base station device 2 as shown in FIG. 2. It is determined as follows. The position where the second base station device 3 is arranged may be determined so as to cover an area where there is a lot of traffic in the wireless cell of the first base station device 2.

  FIG. 3 is a block diagram showing a configuration example of the terminal device 4 in the present embodiment. The terminal device 4 includes a control unit 41, a first wireless unit 42, and a second wireless unit 43. The control unit 41 performs control to select which of the first wireless unit 42 and the second wireless unit 43 to perform communication when communicating with the communication partner. The first wireless unit 42 performs wireless communication with the first base station apparatus 2 in the first wireless mode. The second wireless unit 43 performs wireless communication with the second base station apparatus 3 in the second wireless mode. The terminal device 4 communicates with an external network or another terminal device 4 via the first base station device 2 or the second base station device 3 and the control station device 1.

  FIG. 4 is a flowchart showing the switching process of the wireless mode when the terminal device 4 is not in wireless communication. Here, the case where the terminal device 4 is not in wireless communication means the case where wireless communication by any of the first wireless unit 42 and the second wireless unit 43 is not performed. In the terminal device 4, when the control unit 41 receives a communication request such as an operation by the user or a program being executed in the terminal device 4, the control unit 41 starts the switching process of the wireless mode and activates the second wireless unit (step S11). The control unit 41 causes the second wireless unit 43 to search for a second base station apparatus 3 that can be connected by wireless communication (step S12).

  The control unit 41 determines, based on the search result of the second wireless unit 43, whether or not the connectable second base station device 3 exists within the communicable range (step S13). When the second base station device 3 exists in the communicable range (step S13: YES), the control unit 41 performs control to connect the second base station device 3 existing in the communicable range to the second base station device 3 The second radio unit 43 is caused to start radio communication using the second radio mode (step S14), and the switching process is ended.

  When the second base station device 3 does not exist within the communicable range (step S13: NO), the control unit 41 stops the second wireless unit 43 (step S15), and the first wireless unit 42 is It starts (step S16). The control unit 41 causes the first wireless unit 42 to search for the first base station apparatus 2 that can be connected by wireless communication (step S17).

  The control unit 41 determines whether or not the connectable first base station apparatus 2 is within the communicable range based on the search result of the first wireless unit 42 (step S18). When the first base station device 2 exists in the communicable range (step S18: YES), the control unit 41 performs control to connect the first base station device 2 existing in the communicable range to the first base station device 2 The first radio unit 42 is made to start radio communication using the first radio mode (step S19), and the switching process is ended.

  When the first base station device 2 does not exist within the communicable range (step S18: NO), the control unit 41 stops the first wireless unit 42 (step S20). If the control unit 41 can not connect to the base station apparatus in any of the first wireless mode and the second wireless mode, the control unit 41 waits for a predetermined time (step S21), and returns the process to step S11. The control unit 41 repeatedly performs the process from step S11 to step S21 until wireless communication using the first wireless mode or the second wireless mode is started.

  FIG. 5 is a flowchart showing the switching process of the wireless mode when the terminal device 4 is performing wireless communication in the first wireless mode. During wireless communication in the first wireless mode in the terminal device 4, the control unit 41 activates the second wireless unit 43 (step S 31), and the second base station device 3 connectable by wireless communication is The second radio unit 43 is made to search (step S32). The control unit 41 determines, based on the search result of the second wireless unit 43, whether or not the connectable second base station device 3 is within the communicable range (step S33).

  When the second base station device 3 exists in the communicable range (step S33: YES), the control unit 41 stops the first wireless unit 42 (step S34). The control unit 41 controls the second wireless unit 43 to control connection to the second base station apparatus 3 present in the communicable range, and starts wireless communication using the second wireless mode ( Step S35), the switching process ends.

  When the second base station device 3 does not exist within the communicable range (step S33: NO), the control unit 41 stops the second wireless unit 43 (step S36). If the control unit 41 can not connect to the second base station apparatus 3 in the second wireless mode, the control unit 41 waits for a predetermined time (step S37), and returns the process to step S31. During wireless communication in the first wireless mode, the control unit 41 periodically activates the second wireless unit 43 and searches whether there is a connectable second base station apparatus 3. The switching process (steps S31 to S37) is performed.

  FIG. 6 is a flowchart showing the switching process of the wireless mode when the terminal device 4 is performing wireless communication in the second wireless mode. During wireless communication in the second wireless mode in the terminal device 4, the control unit 41 determines whether or not wireless communication with the second base station device 3 is disconnected (step S41). When the disconnection has not occurred (step S41: NO), the determination is periodically repeated.

  When the wireless communication with the second base station device 3 is disconnected (step S42: YES), the control unit 41 stops the second wireless unit 43 (step S42), and the first wireless unit 42 is activated. It starts (step S43). The control unit 41 causes the first wireless unit 42 to search for the first base station apparatus 2 that can be connected by wireless communication (step S44). The control unit 41 determines whether or not the connectable first base station device 2 is within the communicable range based on the search result of the first wireless unit 42 (step S45).

  When the first base station device 2 exists in the communicable range (step S45: YES), the control unit 41 performs control to connect the first base station device 2 existing in the communicable range to the first base station device 2 The first radio unit 42 is made to start radio communication using the first radio mode (step S46), and the switching process is ended.

  When the first base station device 2 does not exist within the communicable range (step S45: NO), the control unit 41 stops the first wireless unit 42 (step S47), and ends the switching process. After finishing the switching process (from step S41 to step S47), the control unit 41 starts the switching process shown in FIG. 4 to continue the wireless communication in the first wireless mode or the second wireless mode. Plan.

  In the wireless communication system in the present embodiment, the first wireless mode and the second wireless mode are combined and used for wireless communication. The terminal device 4 has a function to switch the wireless mode autonomously as described with reference to FIGS. 3 to 6. The control station apparatus 1 controls the start or stop of the second base station apparatus 3 present in the wireless cell of the first base station apparatus 2 to allow the terminal apparatus 4 to operate in the first radio mode and the second radio mode. It is possible to control which radio mode to use out of the radio modes. As a method of stopping the second base station device 3, a method of stopping the second base station device 3 itself, a method of stopping the radio equipment possessed by the second base station device 3, a second method There is a method of stopping the radio equipment of the base station apparatus 3 and the like. When stopping the second base station device 3, any method may be used.

  FIG. 7 is a block diagram showing a configuration example of the control station device 1 in the present embodiment. The control station apparatus 1 includes a communication unit 11, a monitoring unit 12, a switching determination unit 13, a switching control unit 14, a communication counterpart information storage unit 15, and a terminal information storage unit 16. The switching determination unit 13 and the switching control unit 14 form a control unit. The communication unit 11 relays communication between the first base station device 2 and the second base station device 3 and the Internet. Further, the communication unit 11 transmits and receives control information to and from the first base station device 2 and the second base station device 3. The control information may be used between the terminal device 4 such as traffic in the first base station device 2 and the second base station device 3, an interference state of radio waves, and a waiting time until wireless communication is started. It contains information that indicates the situation.

  The monitoring unit 12 acquires, via the communication unit 11, the usage status regarding wireless communication in which the terminal device 4 uses the first base station device 2. The monitoring unit 12 calculates an average value in the monitoring unit period T for the acquired usage situation, and outputs the calculated average value to the switching determination unit 13 as a determination value indicating the usage situation. Here, the monitoring unit period T is a predetermined period, and is determined according to the fluctuation cycle or fluctuation tendency of the usage state in the first wireless mode in the wireless communication system. Any of a simple moving average, a weighted moving average, or an exponential moving average may be used to calculate the average value regarding the use situation. FIG. 8 is a diagram illustrating a period in which the monitoring unit 12 calculates an average value regarding the usage state. In FIG. 8, the horizontal axis indicates time. The monitoring unit 12 slides and executes monitoring for each monitoring unit period T, as shown in FIG. For example, at time T1, the monitoring unit 12 calculates an average value by averaging values in the past period T from time T1.

  The switching determination unit 13 determines whether to activate the second base station apparatus 3 based on the determination value input from the monitoring unit 12. The switching determination unit 13 outputs the determination result to the switching control unit 14. The switching control unit 14 transmits a request for starting or stopping the second base station apparatus 3 via the communication unit 11 based on the determination result by the switching determination unit 13. Further, the switching control unit 14 notifies the second base station device 3 of the information indicating the connected terminal device 4 together with the request for activation.

  The communication partner information storage unit 15 stores a communication partner list. The communication partner list is a list showing communication partners among the communication partners of the terminal device 4 that prioritizes the use of wireless communication in the second wireless mode via the second base station device 3. FIG. 9 is a diagram showing an example of the communication partner list stored in the communication partner information storage unit 15. In the example of the communication party list shown in FIG. 9, the communication party is indicated by the URL, but the communication party may be indicated using an IP address or other identification information.

  The terminal information storage unit 16 stores a terminal table. The terminal list is a table indicating the terminal device 4 performing wireless communication in the second wireless mode, and is a table including a combination of the terminal device 4 performing wireless communication in the second wireless mode and the second base station apparatus 3 . FIG. 10 is a diagram showing an example of the terminal table stored in the terminal information storage unit 16. As shown in FIG. 10, the terminal table has two lines of the item of the identifier of the second base station apparatus 3 and the item of the identifier of the terminal apparatus 4. Each row in the terminal table represents a combination of the second base station device 3 and the terminal device 4 that can perform wireless communication in the second wireless mode. The registration with respect to the terminal table of the combination of the second base station apparatus 3 and the terminal apparatus 4 may be performed in advance, or in response to a request from the terminal apparatus 4 via the first base station apparatus 2 It may be performed, and the means is not limited.

  The switching control unit 14 notifies information related to the terminal device 4 connected to the second base station device 3 based on the terminal list. The second base station apparatus 3 that has received the notification from the switching control unit 14 connects only the notified terminal apparatus 4. For example, the second base station apparatus 3 indicated by the identifier "# 0" is connected to the terminal apparatus 4 indicated by the identifier "00: 11: 22: 33: 44: 55" in the second wireless mode. Perform wireless communication. In FIG. 10, although one terminal apparatus 4 is shown as a terminal apparatus 4 capable of performing wireless communication in the second radio mode with respect to one second base station apparatus 3, one second base station apparatus 3 is shown. A plurality of terminal devices 4 may be combined with one another. Further, in the example shown in FIG. 10, the MAC address is used as the identifier of the terminal device 4, but other information may be used as long as the information can uniquely identify the terminal device 4.

  In the wireless communication system according to the present embodiment, the control station apparatus 1 monitors the use status in the wireless communication in the first wireless mode, and the present use status is in any of the four stages of the use status divided into four stages. Determine the The control station apparatus 1 uses three threshold values A, B and C (A <B <C) indicating the boundaries of the respective stages when determining the stages of the use situation. The control station apparatus 1 controls the start or stop of the second base station apparatus 3 based on the stage of the current usage condition.

  For example, when the determination value of the usage status is represented by traffic, thresholds A, B and C are determined based on the maximum traffic that the first base station apparatus 2 can process per unit time. In addition, when the determination value of the use status is indicated by a combination of parameters of traffic and radio wave interference, each of the thresholds A, B and C is also determined by a combination of parameters. Moreover, below, it represents with the ratio of the 2nd base station apparatus 3 about the 2nd base station apparatus 3 started according to the step of the utilization condition. As a ratio to be used, 10%, 20%, 30%, 50% etc. are used, for example. When there are 100 second base station apparatuses 3, 10% corresponds to 10 second base station apparatuses 3.

  FIG. 11 is a flowchart showing a switching process according to the usage status performed by the control station device 1 in the present embodiment. The control station apparatus 1 performs switching processing for each first base station apparatus 2. That is, the control station apparatus 1 determines the determination value of the utilization status of the first radio mode for each radio cell of the first base station apparatus 2, and the second base station apparatus 3 present in the radio cell. Control the start or stop of the

  When the switching process is started in the control station device 1, the switching determination unit 13 acquires the determination value V of the usage status acquired by the monitoring unit 12, and compares the determination value V with the thresholds A, B, and C. Thus, the usage status is determined (step S51). In step S51, the switching determination unit 13 determines that the determination value V is less than the threshold A (V <A), the determination value V is greater than or equal to the threshold A and less than the threshold B (A ≦ V <B), and the determination value V is greater than or equal to the threshold B It is determined in which of four stages below the threshold C (B ≦ V <C) and the determination value V is the threshold C or more (C ≦ V), the current usage situation.

  If the determination value V is less than the threshold A (step S51: V <A), the switch determination unit 13 returns the process to step S51 after waiting for N seconds. That is, when the usage status is (V <A), the switching determination unit 13 determines the usage status every fixed time (N seconds). The N seconds of the waiting time is determined based on the change in traffic in the first wireless mode in the wireless communication system and the responsiveness of the traffic distribution required for the wireless communication system.

  If the determination value V is greater than or equal to the threshold A and less than the threshold B (step S51: A ≦ V <B), the switching control unit 14 determines the inside of the radio cell of the first base station device 2 that is the target of the switching process. It is determined to activate the 10% second base station apparatus 3 among the second base station apparatuses 3 present in. The switching control unit 14 selects the second base station apparatus 3 to be activated, and transmits an activation request for the selected second base station apparatus 3 via the communication unit 11 (step S61). At this time, the switching control unit 14 reads the identifier of the terminal device 4 with which the selected second base station device 3 performs wireless communication in the second wireless mode from the terminal list, and includes the read identifier in the activation request. The 10% second base station apparatus 3 that has received the activation request from the control station apparatus 1 is activated in response to the activation request, and is connected to only the terminal apparatus 4 notified by the activation request in the second wireless mode. Perform wireless communication.

  If the size of the wireless cell of the first base station apparatus 2 and the size of the sum of the wireless cells of the plurality of second base station apparatuses 3 present in the wireless cell of the first base station apparatus 2 are the same For example, by activating the 10% second base station apparatus 3, the traffic in the first wireless mode is reduced by 10%, and it can be expected that the traffic for that time will use the second wireless mode.

  In addition, when the switching control unit 14 selects the second base station device 3 to be activated, the terminal device 4 among the second base station devices 3 present in the radio cell of the first base station device 2. And the second base station apparatus 3 having the shortest accumulated time of performing wireless communication in the second wireless mode. The cumulative time is, for example, the cumulative communication time in a predetermined period (such as one day or one hour). By selecting the second base station apparatus 3 to be activated as described above, the switching control unit 14 smoothes out the variation of the accumulated time in which the wireless communication of each of the second base station apparatuses was performed. The wireless communication in the second wireless mode can perform high-speed wireless communication while consuming large power. Therefore, when the terminal device 4 is operating with the power of a battery such as a secondary battery, if the time for performing wireless communication in the second wireless mode becomes long, the operable time of the terminal device 4 becomes short. Therefore, by distributing the terminal devices 4 that perform wireless communication in the second wireless mode, it is possible to suppress the power consumption of each of the terminal devices 4 and to suppress shortening of the operable time of the terminal devices 4.

  When the 10% second base station apparatus 3 is activated, the switching determination unit 13 waits for N seconds (step S62), acquires the determination value V of the usage status acquired by the monitoring unit 12, and determines the usage status. (Step S63). The determination in step S63 is a determination as to whether or not there has been a change in the use status after activating the 10% second base station apparatus 3. That is, it is determined whether the determination value V is greater than or equal to the threshold A and less than the threshold B without changing the use status, or whether the determination value V is less than the threshold A or the determination value V is greater than the threshold B Do.

  When there is no change in the use status (step S63: A ≦ V <B), the switching control unit 14 increases the ratio of the second base station device 3 to be activated, and the second base station device 3 of 20% Decide to launch. On the other hand, if the second base station device 3 used so far continues the wireless communication, the power consumption of the terminal device 4 wirelessly communicating with the second base station device 3 becomes too large, The second base station device 3 used so far is stopped, and the other second base station device 3 is activated. The switching control unit 14 transmits, via the communication unit 11, a stop request to the second base station device 3 that is in wireless communication with the terminal device 4 (step S64). The switching control unit 14 selects the other 20% of the second base station device 3 among the second base station devices 3 present in the wireless cell of the first base station device 2 and selects the second base station device 3 selected. The activation request to the base station device 3 is transmitted via the communication unit 11 (step S65). The second base station device 3 activated in step S65 is, for example, the cumulative time of radio communication with the terminal device 4 in the second radio mode among the 90% second base station devices 3 not used. Are selected in order from the shortest second base station apparatus 3.

  When the 20% second base station apparatus 3 is activated, the switching determination unit 13 waits for N seconds (step S66), and then returns the process to step S63. The processes from step S64 to step S66 are repeated until the use status changes.

  When there is a change in the use status in the determination of step S63 (step S63: OTHER), the switching control unit 14 causes the activated second base station apparatus 3 to stop, and processing suitable for the use status is performed. Decide to determine the usage status again. The switching control unit 14 transmits, via the communication unit 11, a stop request to the second base station device 3 that is in wireless communication with the terminal device 4 (step S67), and returns the process to step S51.

  If the determination value V is greater than or equal to the threshold B and less than the threshold C in the determination of step S51 (step S51: B ≦ V <C), the switching control unit 14 is the first base station apparatus that is the target of the switching process. It decides to activate the second base station apparatus 3 of 20% of the second base station apparatuses 3 present in two radio cells. The switching control unit 14 selects the second base station device 3 to be activated, and transmits an activation request for the selected second base station device 3 via the communication unit 11 (step S71). The 20% second base station apparatus 3 having received the activation request from the control station apparatus 1 is activated in response to the activation request, and is connected to only the terminal apparatus 4 notified by the activation request, in the second wireless mode. Perform wireless communication. The selection of the second base station apparatus 3 is performed in the same manner as the selection in step S61.

  As described above, the size obtained by adding the size of the wireless cell of the first base station apparatus 2 and the wireless cells of the plurality of second base station apparatuses 3 present in the wireless cell of the first base station apparatus 2 If the same is true, activating the 20% second base station apparatus 3 reduces the traffic in the first radio mode by 20%, and the traffic for that use the second radio mode. I can expect it.

  When the 20% second base station apparatus 3 is activated, the switching determination unit 13 waits for N seconds (step S72), acquires the determination value V of the usage status acquired by the monitoring unit 12, and determines the usage status. (Step S73). The determination in step S73 is a determination as to whether or not there has been a change in the use status after activating the 20% second base station apparatus 3. That is, it is determined whether the determination value V is greater than or equal to the threshold B and less than the threshold C without changing the usage status, or whether the determination value V is less than the threshold B or the determination value V is greater than or equal to the threshold C Do.

  When there is no change in the use status (step S73: B ≦ V <C), the switching control unit 14 increases the ratio of the second base station device 3 to be activated, and the 30% second base station device 3 Decide to launch. The switching control unit 14 transmits, via the communication unit 11, a stop request to the second base station device 3 that is in wireless communication with the terminal device 4 (step S74). The switching control unit 14 selects the other 30% of the second base station device 3 among the second base station devices 3 present in the wireless cell of the first base station device 2 and selects the second base station device 3 selected. The activation request to the base station device 3 is transmitted via the communication unit 11 (step S75). The selection of the second base station apparatus 3 in step S75 is performed in the same manner as the selection in step S65.

  When the 30% second base station apparatus 3 is activated, the switching determination unit 13 waits for N seconds (step S76), and then returns the process to step S73. The processes from step S74 to step S76 are repeated until the use status changes.

  When there is a change in the use status in the determination of step S73 (step S73: OTHER), the switching control unit 14 stops the activated second base station apparatus 3 so that processing suitable for the use status is performed. Decide to determine the usage status again. The switching control unit 14 transmits, via the communication unit 11, a stop request to the second base station device 3 that is in wireless communication with the terminal device 4 (step S67), and returns the process to step S51.

  If the determination value V is greater than or equal to the threshold C in the determination of step S51 (step S51: C ≦ V), the switching control unit 14 determines that the wireless cell of the first base station device 2 that is the target of the switching process. It decides to activate the 30% second base station device 3 among the existing second base station devices 3. The switching control unit 14 selects the second base station device 3 to be activated, and transmits an activation request for the selected second base station device 3 via the communication unit 11 (step S81). In the second wireless mode, the 30% second base station apparatus 3 that has received the activation request from the control station apparatus 1 is activated in response to the activation request, and is connected only to the terminal apparatus 4 notified by the activation request. Perform wireless communication. The selection of the second base station apparatus 3 in step S81 is performed in the same manner as the selection in step S61.

  As described above, the size obtained by adding the size of the wireless cell of the first base station apparatus 2 and the wireless cells of the plurality of second base station apparatuses 3 present in the wireless cell of the first base station apparatus 2 If the same is true, activating 30% of the second base station device 3 reduces the traffic in the first wireless mode by 30%, and the traffic for that amount uses the second wireless mode. I can expect it.

  When 30% of the second base station apparatus 3 is activated, the switching determination unit 13 waits for N seconds (step S82), acquires the determination value V of the usage status acquired by the monitoring unit 12, and determines the usage status. (Step S83). The determination in step S83 is a determination as to whether or not there has been a change in the use status after activating the second base station apparatus 3 of 30%. That is, it is determined whether the determination value V is equal to or greater than the threshold C without changing the usage status, or whether the determination value V is less than the threshold C when the usage status changes.

  If there is no change in the use status (step S83: V ≦ C), the switching control unit 14 increases the ratio of the second base station device 3 to be activated and activates the 50% second base station device 3 Decide to let it go. The switching control unit 14 transmits, via the communication unit 11, a stop request to the second base station device 3 that is in wireless communication with the terminal device 4 (step S84). The switching control unit 14 selects the other 50% of the second base station device 3 among the second base station devices 3 present in the wireless cell of the first base station device 2 and selects the second base station device 3 selected. The activation request to the base station device 3 is transmitted via the communication unit 11 (step S85).

  When the 50% second base station apparatus 3 is activated, the switching determination unit 13 waits for N seconds (step S86), and thereafter returns the process to step S83. The processes from step S84 to step S86 are repeated until the use status changes.

  When there is a change in the use status in the determination of step S83 (step S83: OTHER), the switching control unit 14 stops the activated second base station apparatus 3 so that processing suitable for the use status is performed. Decide to determine the usage status again. The switching control unit 14 transmits, via the communication unit 11, a stop request to the second base station device 3 that is in wireless communication with the terminal device 4 (step S67), and returns the process to step S51.

  In the wireless communication system of the present embodiment, the control station device 1 performs the switching process shown in FIG. 11 to activate the second base station device 3 at a rate suitable for the usage status of the first wireless mode. The usage status of the first wireless mode is represented, for example, by a moving average of traffic. Further, the use situation is evaluated by being divided into a plurality of classes, and the ratio of the second base station apparatus 3 to be activated is determined based on the classes. Also, the terminal device 4 to be connected is notified to the second base station device 3 activated by the control station device 1. As a result, the number of terminal apparatuses 4 using the second wireless mode can be significantly increased, and the occurrence of a situation where throughput can not be improved by using the second wireless mode can be suppressed. Throughput in the system can be improved.

  In addition, also when the use status of the first wireless mode changes while the second wireless mode is being used, the second base station apparatus 3 having a ratio suitable for the use status is activated. Can. For example, although the determination value V is greater than or equal to the threshold A and less than the threshold B and the second base station apparatus 3 having 10% is activated, the use of the first wireless mode is further increased thereafter and the determination value If V becomes equal to or greater than the threshold C, the process of step S67 is performed after the determination of step S63, the determination of step S51 is performed again, and the 30% second base station apparatus 3 is activated. (Step S81). As described above, the control station apparatus 1 can flexibly control the ratio of the second base station apparatus 3 to be activated based on the usage status of the first wireless mode.

  FIG. 12 is a flowchart showing the passage permission process performed by the control station device 1 in the present embodiment. When the terminal device 4 accesses a server in the Internet or a local area network, when the address resolution request for the corresponding URL is issued to the control station device 1, the passage permission process is started in the control station device 1.

  The switching determination unit 13 determines whether the URL to be subjected to the address resolution matches the communication destination list of the communication destination information storage unit 15 or whether the URL included in the communication destination list is included (step S91). If the URL to be subjected to the address resolution does not match the communication partner list and the URL does not include the information on the communication partner list (step S91: NO), the switching judgment unit 13 sends the request to the terminal device 4 that transmitted the request. Then, it is determined to permit passage in the first wireless mode (step S92), and the process ends. Here, to permit passage in the first wireless mode is to permit the terminal device 4 that has transmitted the address resolution request to perform communication via the first base station device 2, and the control station The device 1 relays the communication.

  If the URL subject to address resolution matches the communication partner list, or if the URL contains information on the communication partner list (step S91: YES), the switching determination unit 13 performs DNS via the communication unit 11. The URL of the communication partner is transmitted to the server to acquire the IP address of the communication partner, and the acquired IP address is transmitted to the terminal device 4 as a response to the address resolution request (step S93). The switching control unit 14 selects the second base station apparatus 3 that can communicate wirelessly in the second wireless mode with the terminal device 4 that has transmitted the request, based on the terminal list of the terminal information storage unit 16 and selects the second The activation request is transmitted to the base station device 3 of the second embodiment via the communication unit 11 (step S94).

  The communication unit 11 determines whether the communication from the terminal device 4 is communication to the IP address acquired in step S93 (step S95), and the communication from the terminal device 4 is not communication to the IP address (Step S95: NO), the process proceeds to step S92. If the communication from the terminal device 4 is a communication to the IP address acquired in step S 93 (step S 95: YES), the communication unit 11 determines whether the communication is a communication via the second base station device 3 It is determined (step S96).

  When not communicating via the second base station device 3 (step S96: NO), the communication unit 11 returns a response of redirect (http redirect) for guiding to the wait page for communication from the terminal device 4 (step S97), the process returns to step S95. The operation of step S97 can be performed until the activation of the second base station device 3 can be confirmed and access to the wait page is performed via the second base station device 3.

  In the case of communication via the second base station device 3 (step S96: YES), the communication unit 11 notifies the terminal device 4 to communicate with the communication partner indicated by the acquired IP address, and sends it to the communication partner A redirect to induce is performed (step S98). The switching determination unit 13 determines to permit the terminal device 4 to pass in the second wireless mode (step S99), and ends the process. Here, to permit passage in the second wireless mode is to permit the terminal device 4 that has transmitted the address resolution request to perform communication via the second base station device 3, and the control station The device 1 relays the communication.

  FIG. 13 is a flowchart showing stop processing performed by the control station device 1 after the passage permission processing. After permitting the passage in the second wireless mode, the control station apparatus 1 performs the stop process. In the control station apparatus 1, when the stop process is started, the switching control unit 14 determines whether or not the wireless communication in the second wireless mode for which passage is permitted is continuing (step S101).

  When the wireless communication in the second wireless mode in which the passage is permitted is continuing (step S101: YES), the switching control unit 14 stands by for a predetermined time (step S102), and returns the process to step S101. That is, the switching control unit 14 determines whether or not the wireless communication in the second wireless mode is continued at fixed time intervals. When the wireless communication in the second wireless mode in which the passage is permitted is completed (step S101: NO), the switching control unit 14 performs the second wireless communication in the second wireless communication mode to be determined. A stop request to the base station device 3 is transmitted via the communication unit 11 (step S103), and the process is ended.

  FIG. 14 is a sequence diagram showing an operation of the wireless communication system when the passage permission process shown in FIG. 12 is performed. When the control station apparatus 1 receives an address resolution request for the URL of the communication partner from the terminal apparatus 4 via the first base station apparatus 2 (step S201), the URL of the communication partner matches the communication partner list or the communication partner When it is detected that the information of the list is included, an address resolution request for the URL of the communication partner is sent to the DNS (step S202).

  The control station apparatus 1 acquires the IP address of the communication partner from the response of the address resolution request, and notifies the terminal apparatus 4 of the IP address via the first base station apparatus 2 (step S203). Further, the control station apparatus 1 transmits a start request to the second base station apparatus 3 capable of performing wireless communication in the second wireless mode with the terminal apparatus 4 that has transmitted the address resolution request (step S204).

  When the control station apparatus 1 receives the http request from the terminal apparatus 4 whose communication partner is the acquired IP address (step S205), the control station apparatus 1 returns a response for redirecting to the wait page in response to the http request (step S206). The operation of step S206 is performed until the activation of the second base station device 3 is confirmed, and access to the wait page is received via the second base station device 3.

  When the control station apparatus 1 receives an activation response from the second base station apparatus 3 and an http request from the terminal apparatus 4 is received via the second base station apparatus 3, it is indicated by an IP address. A redirecting response instructing the terminal device 4 to communicate with the communication partner is folded back (step S207). Thereafter, the control station apparatus 1 relays the http request from the terminal apparatus 4 whose communication partner is the acquired IP address to the communication partner (step S208), and continues the wireless communication using the second wireless mode.

  In the wireless communication system according to the present embodiment, the control station apparatus 1 communicates with either the first base station apparatus 2 or the second base station apparatus 3 based on the communication partner of the communication by the terminal apparatus 4. It is determined whether the terminal device 4 is to communicate with the If the control station apparatus 1 determines that communication is to be performed via the second base station apparatus 3, the second base station apparatus 3 capable of wireless communication in the second wireless mode with the terminal apparatus 4 is activated; After confirming that the terminal device 4 can communicate via the second base station device 3, relay to the other party of communication is started. As a result, communication with the other party whose communication is expected to significantly increase traffic or the other party whose communication is expected to significantly increase traffic is performed in the second wireless mode, so that traffic in the entire wireless communication system can be reduced to the first wireless The throughput can be improved in the wireless communication system by distributing the mode and the second wireless mode.

  FIG. 15 is a flowchart showing the passage permission process performed by the control station device 1 in the present embodiment. The passing permission process shown in FIG. 15 is different from the passing permission process shown in FIG. 12 in that it is performed based on the data size in communication. When the terminal device 4 accesses a server in the Internet or a local area network, the passage permission process is started in the control station device 1.

  The switching determination unit 13 determines whether or not the data size of data to be uploaded to the communication partner in the communication from the terminal device 4 or the data size of data to be downloaded from the communication partner is equal to or larger than a predetermined data amount (threshold). (Step S111). If the data size is less than the threshold (step S111: NO), the switching control unit 14 determines to permit passage of the terminal device 4 that has requested communication in the first wireless mode (step S112). End the process.

  If the data size is equal to or greater than the threshold (step S111: YES), the switching control unit 14 determines, based on the terminal list, the second base station apparatus 3 that can communicate wirelessly in the second wireless mode with the terminal 4 that has requested communication. A start request is transmitted to the selected second base station apparatus 3 via the communication unit 11 (step S113). In response to the communication from the terminal device 4, the communication unit 11 returns a response of redirect for guiding to the wait page (step S114).

  The communication unit 11 determines whether the communication from the terminal device 4 is communication via the second base station device 3 (step S115). When it is not the communication which went through via the 2nd base station apparatus 3 (Step S115: NO), communications department 11 returns processing to Step S114. This operation is repeated until the second base station device 3 is activated and access from the terminal device 4 to the wait page is performed using the second base station device 3.

  In the case of communication via the second base station device 3 (step S115: YES), the communication unit 11 performs redirection to notify the terminal device 4 so as to communicate with the other party of communication and to guide to the other party of communication (step S116). The switching determination unit 13 determines to permit the terminal device 4 to pass in the second wireless mode (step S117), and ends the process.

  When the control station device 1 permits the terminal device 4 to pass in the second wireless mode in the pass permission process shown in FIG. 15, the control station device 1 performs the stop process shown in FIG. When the wireless communication ends, the second base station device 3 is stopped.

  FIG. 16 is a sequence diagram showing an operation of the wireless communication system when the passage permission process shown in FIG. 15 is performed. When the control station apparatus 1 receives the http request from the terminal apparatus 4 to the communication partner via the first base station apparatus 2 (step S301), the control station apparatus 1 determines whether the data size is equal to or larger than the threshold (step S301) S302). If the control station apparatus 1 determines that the data size is equal to or larger than the threshold, it transmits a start request to the second base station apparatus 3 capable of performing wireless communication in the second wireless mode with the terminal apparatus 4 that has requested communication ( Step S303).

  Further, the control station apparatus 1 returns a response for redirecting to the wait page in response to the http request (step S304). The operation in step S304 is performed until the activation of the second base station device 3 is confirmed, and access to the wait page is received via the second base station device 3.

  The control station apparatus 1 receives a response of activation from the second base station apparatus 3 and communicates with the communication partner when an http request from the terminal apparatus 4 is received via the second base station apparatus 3 In this way, a redirecting response directed to the terminal device 4 is folded back (step S305). After this, the control point device 1 relays the http request from the terminal device 4 to the communication counterpart (step S306), and continues the wireless communication using the second wireless mode.

  In the wireless communication system of this embodiment, the control station apparatus 1 communicates with the other party via either the first base station apparatus 2 or the second base station apparatus 3 based on the data size of communication by the terminal apparatus 4. It is determined whether the terminal device 4 is to communicate with the If the control station apparatus 1 determines that communication is to be performed via the second base station apparatus 3, the second base station apparatus 3 capable of wireless communication in the second wireless mode with the terminal apparatus 4 is activated; After confirming that the terminal device 4 can communicate via the second base station device 3, relay to the other party of communication is started. Thus, by causing the communication in the first wireless mode to perform communication in the second wireless mode to increase the traffic in the first wireless mode, the traffic in the entire wireless communication system is dispersed into the first wireless mode and the second wireless mode. Throughput in a wireless communication system can be improved.

  In the wireless communication system of this embodiment, the control station apparatus 1 divides the use status into four stages to determine the ratio of the second base station apparatus 3 to be activated, but the use status The ratio of the second base station apparatus 3 to be activated may be determined for each stage in three or five or more stages. In addition, although the configuration has been described in which the number of second base station devices 3 to be activated is determined in proportion to the total number of second base station devices 3, the number of second base station devices 3 to be activated in each stage is described. You may decide.

  All or part of the control station apparatus 1 in the embodiment described above may be realized by a computer. For example, a program for realizing each component of the control station apparatus 1 is recorded in a computer readable recording medium, and the computer system reads and executes the program recorded in the recording medium. May be Here, the “computer system” includes an OS and hardware such as peripheral devices. The term "computer-readable recording medium" refers to a storage medium such as a flexible disk, a magneto-optical disk, a ROM, a portable medium such as a ROM or a CD-ROM, or a hard disk built in a computer system. Furthermore, “computer-readable recording medium” dynamically holds a program for a short time, like a communication line in the case of transmitting a program via a network such as the Internet or a communication line such as a telephone line. It may also include one that holds a program for a certain period of time, such as volatile memory in a computer system that becomes a server or client in that case. Further, this program may be for realizing a part of the above-mentioned components, and the above-mentioned components can be realized in combination with a program already recorded in a computer system. It may be realized using hardware such as PLD (Programmable Logic Device) or FPGA (Field Programmable Gate Array).

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design and the like within the scope of the present invention.

  It is also applicable to applications where it is essential to improve the throughput in a network combining different wireless communication schemes.

DESCRIPTION OF SYMBOLS 1 ... Control station apparatus 2 ... 1st base station apparatus 3 ... 2nd base station apparatus 4 ... Terminal apparatus 11 ... Communications part 12 ... Monitoring part 13 ... Switching determination part 14 ... Switching control part 15 ... Communications party information storage part 16 ... terminal information storage unit 41 ... control unit 42 ... first wireless unit 43 ... second wireless unit

Claims (12)

A first base station apparatus performing wireless communication using a first wireless mode with a plurality of terminal devices, and a second wireless mode having a faster communication speed and shorter communication distance than the first wireless mode A wireless communication system, comprising: a plurality of second base station apparatuses that perform wireless communication with the terminal apparatus; and a control station apparatus that switches whether the second base station apparatus performs wireless communication or not.
The control station apparatus
A monitoring unit configured to acquire a use status of wireless communication of the terminal apparatus via the first base station apparatus;
The second base station apparatus for performing wireless communication with the terminal apparatus is selected from the plurality of second base station apparatuses based on the usage status, and the selected second base station apparatus is selected. A control unit for starting wireless communication with the terminal device;
Equipped with
The terminal device capable of performing wireless communication using the second wireless mode is determined for each of the second base station devices ,
The control unit
After a predetermined time has elapsed since the selected second base station apparatus started wireless communication with the terminal apparatus, the second base station apparatus is stopped.
Wireless communication system. A first base station apparatus performing wireless communication using a first wireless mode with a plurality of terminal devices, and a second wireless mode having a faster communication speed and shorter communication distance than the first wireless mode A wireless communication system, comprising: a plurality of second base station apparatuses that perform wireless communication with the terminal apparatus; and a control station apparatus that switches whether the second base station apparatus performs wireless communication or not.
The control station apparatus
A monitoring unit that acquires a moving average of traffic via the first base station apparatus as a use status of wireless communication of the terminal apparatus via the first base station apparatus;
The second base station apparatus for performing wireless communication with the terminal apparatus is selected from the plurality of second base station apparatuses based on the usage status, and the selected second base station apparatus is selected. A control unit for starting wireless communication with the terminal device;
Equipped with
Two or more of the second base station apparatuses exist within the communication distance of the first base station apparatus,
The terminal device capable of performing wireless communication using the second wireless mode is determined for each of the second base station devices,
The control unit
Based on whether either of the moving average of either the current of the traffic of a plurality of classes defined with respect to the moving average of the previous SL traffic, the second present within the communication range of the first base station apparatus Determining a ratio of the second base station apparatus for starting wireless communication with the terminal apparatus in the base station apparatus of
Wireless communication system. A first base station apparatus performing wireless communication using a first wireless mode with a plurality of terminal devices, and a second wireless mode having a faster communication speed and shorter communication distance than the first wireless mode A wireless communication system, comprising: a plurality of second base station apparatuses that perform wireless communication with the terminal apparatus; and a control station apparatus that switches whether the second base station apparatus performs wireless communication or not.
The control station apparatus
A monitoring unit configured to acquire a use status of wireless communication of the terminal apparatus via the first base station apparatus;
The second base station apparatus for performing wireless communication with the terminal apparatus is selected from the plurality of second base station apparatuses based on the usage status, and the selected second base station apparatus is selected. A control unit for starting wireless communication with the terminal device;
Equipped with
The terminal device capable of performing wireless communication using the second wireless mode is determined for each of the second base station devices,
The control unit
It is determined which of the first base station apparatus and the second base station apparatus is to cause the terminal apparatus to communicate with the other party based on the communication partner of the terminal apparatus,
When the terminal apparatus is caused to perform communication with the other party via the second base station apparatus, the second base station apparatus capable of wireless communication with the terminal apparatus is caused to start wireless communication.
Radio communications system. The control unit
In the case where a predetermined number of the second base station apparatuses start radio communication with the terminal apparatus when the determination value indicating the usage status becomes equal to or more than a predetermined threshold, and the determination value becomes less than the threshold Stopping the predetermined number of the second base station apparatuses,
The wireless communication system according to any one of claims 1 to 3 . The control unit
Based on the data size of communication by the terminal device, it is determined which of the first base station device and the second base station device is to cause the terminal device to communicate with the other party of communication,
When the terminal apparatus is caused to perform communication with the other party via the second base station apparatus, the second base station apparatus capable of wireless communication with the terminal apparatus is caused to start wireless communication.
The wireless communication system according to any one of claims 1 to 4. The control unit
When selecting the second base station apparatus that starts wireless communication with the terminal apparatus, the second base station apparatus may smooth the variation in accumulated time in which each of the second base station apparatuses performed wireless communication. Select a base station device,
The wireless communication system according to any one of claims 1 to 5. A first base station apparatus performing wireless communication using a first wireless mode with a plurality of terminal devices, and a second wireless mode having a faster communication speed and shorter communication distance than the first wireless mode A control method in a wireless communication system, comprising: a plurality of second base station apparatuses performing wireless communication with the terminal apparatus; and a control station apparatus switching whether to cause the second base station apparatus to perform wireless communication ,
A monitoring step in which the control station apparatus acquires a use status of wireless communication of the terminal apparatus via the first base station apparatus;
The control station apparatus selects the second base station apparatus to perform wireless communication with the terminal apparatus among the plurality of second base station apparatuses based on the use status, and selects the second base station apparatus. A control step of causing the base station apparatus of the mobile station to start wireless communication with the terminal apparatus;
Have
The terminal device capable of performing wireless communication using the second wireless mode is determined for each of the second base station devices ,
In the control step, the control station apparatus
After a predetermined time has elapsed since the selected second base station apparatus started wireless communication with the terminal apparatus, the second base station apparatus is stopped.
Control method. A first base station apparatus performing wireless communication using a first wireless mode with a plurality of terminal devices, and a second wireless mode having a faster communication speed and shorter communication distance than the first wireless mode A control method in a wireless communication system, comprising: a plurality of second base station apparatuses performing wireless communication with the terminal apparatus; and a control station apparatus switching whether to cause the second base station apparatus to perform wireless communication ,
A monitoring step in which the control station apparatus acquires a moving average of traffic via the first base station apparatus as a use status of wireless communication of the terminal apparatus via the first base station apparatus;
The control station apparatus selects the second base station apparatus to perform wireless communication with the terminal apparatus among the plurality of second base station apparatuses based on the use status, and selects the second base station apparatus. A control step of causing the base station apparatus of the mobile station to start wireless communication with the terminal apparatus;
Have
Two or more of the second base station apparatuses exist within the communication distance of the first base station apparatus,
The terminal device capable of performing wireless communication using the second wireless mode is determined for each of the second base station devices,
In the control step, the control station apparatus
The second existing within the communication range of the first base station apparatus based on which of a plurality of classes defined for the moving average of the traffic includes the moving average of the current traffic. Determining a ratio of the second base station apparatus for starting wireless communication with the terminal apparatus in the base station apparatus;
Control method. A first base station apparatus performing wireless communication using a first wireless mode with a plurality of terminal devices, and a second wireless mode having a faster communication speed and shorter communication distance than the first wireless mode A control method in a wireless communication system, comprising: a plurality of second base station apparatuses performing wireless communication with the terminal apparatus; and a control station apparatus switching whether to cause the second base station apparatus to perform wireless communication ,
A monitoring step in which the control station apparatus acquires a use status of wireless communication of the terminal apparatus via the first base station apparatus;
The control station apparatus selects the second base station apparatus to perform wireless communication with the terminal apparatus among the plurality of second base station apparatuses based on the use status, and selects the second base station apparatus. A control step of causing the base station apparatus of the mobile station to start wireless communication with the terminal apparatus;
Have
The terminal device capable of performing wireless communication using the second wireless mode is determined for each of the second base station devices,
In the control step, the control station apparatus
It is determined which of the first base station apparatus and the second base station apparatus is to cause the terminal apparatus to communicate with the other party based on the communication partner of the terminal apparatus,
When the terminal apparatus is caused to perform communication with the other party via the second base station apparatus, the second base station apparatus capable of wireless communication with the terminal apparatus is caused to start wireless communication.
Control method. A first base station apparatus performing wireless communication using a first wireless mode with a plurality of terminal devices, and a second wireless mode having a faster communication speed and shorter communication distance than the first wireless mode A control station apparatus in a wireless communication system, comprising: a plurality of second base station apparatuses that perform wireless communication with the terminal apparatus; and a control station apparatus that switches whether the second base station apparatus performs wireless communication. There,
A monitoring unit configured to acquire a use status of wireless communication of the terminal apparatus via the first base station apparatus;
The second base station apparatus for performing wireless communication with the terminal apparatus is selected from the plurality of second base station apparatuses based on the usage status, and the selected second base station apparatus is selected. A control unit for starting wireless communication with the terminal device;
Equipped with
The terminal device capable of performing wireless communication using the second wireless mode is determined for each of the second base station devices ,
The control unit
After a predetermined time has elapsed since the selected second base station apparatus started wireless communication with the terminal apparatus, the second base station apparatus is stopped.
Control station device. A first base station apparatus performing wireless communication using a first wireless mode with a plurality of terminal devices, and a second wireless mode having a faster communication speed and shorter communication distance than the first wireless mode A control station apparatus in a wireless communication system, comprising: a plurality of second base station apparatuses that perform wireless communication with the terminal apparatus; and a control station apparatus that switches whether the second base station apparatus performs wireless communication. There,
A monitoring unit that acquires a moving average of traffic via the first base station apparatus as a use status of wireless communication of the terminal apparatus via the first base station apparatus;
The second base station apparatus for performing wireless communication with the terminal apparatus is selected from the plurality of second base station apparatuses based on the usage status, and the selected second base station apparatus is selected. A control unit for starting wireless communication with the terminal device;
Equipped with
Two or more of the second base station apparatuses exist within the communication distance of the first base station apparatus,
The terminal device capable of performing wireless communication using the second wireless mode is determined for each of the second base station devices,
The control unit
The second existing within the communication range of the first base station apparatus based on which of a plurality of classes defined for the moving average of the traffic includes the moving average of the current traffic. Determining a ratio of the second base station apparatus for starting wireless communication with the terminal apparatus in the base station apparatus;
Control station device. A first base station apparatus performing wireless communication using a first wireless mode with a plurality of terminal devices, and a second wireless mode having a faster communication speed and shorter communication distance than the first wireless mode A control station apparatus in a wireless communication system, comprising: a plurality of second base station apparatuses that perform wireless communication with the terminal apparatus; and a control station apparatus that switches whether the second base station apparatus performs wireless communication. There,
A monitoring unit configured to acquire a use status of wireless communication of the terminal apparatus via the first base station apparatus;
The second base station apparatus for performing wireless communication with the terminal apparatus is selected from the plurality of second base station apparatuses based on the usage status, and the selected second base station apparatus is selected. A control unit for starting wireless communication with the terminal device;
Equipped with
The terminal device capable of performing wireless communication using the second wireless mode is determined for each of the second base station devices,
The control unit
It is determined which of the first base station apparatus and the second base station apparatus is to cause the terminal apparatus to communicate with the other party based on the communication partner of the terminal apparatus,
When the terminal apparatus is caused to perform communication with the other party via the second base station apparatus, the second base station apparatus capable of wireless communication with the terminal apparatus is caused to start wireless communication.
Control station device.

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