JP2016152469A - Administrative server, terminal device, communication control method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an administrative server capable of giving a communication opportunity to a non-communication application.SOLUTION: An administrative server 1 comprises: a reception part 11 for receiving an identifier of a non-communication device having a non-communication application that cannot perform radio communications, a priority of the non-communication application, a required resource amount of the non-communication application for each radio base station 2 to which the non-communication device is connectable, and an additional resource amount for each radio base station; a connection destination determination part 13 for determining a new connection destination of the non-communication device identified by the received identifier of the non-communication device in the order starting from the highest priority of the non-communication application; and a connection destination change instruction transmission part 14 for transmitting a connection destination change instruction to the non-communication device of which the new connection destination has been determined. The connection destination determination part 13 determines, as the new connection destination of the non-communication device, a radio base station having an additional resource amount equal to or more than the required resource amount from among the radio base stations to which the non-communication device is connectable.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a management server or the like that manages a plurality of wireless communication systems including a wireless base station and a terminal device that performs wireless communication with the wireless base station.

  Conventionally, in order to realize wireless communication that satisfies the user's experience quality (QoE), radio resources have been allocated so that the difference between the achieved value of the user's QoE and the target value becomes small. (For example, refer to Patent Document 1).

  In addition, the possibility of accommodating wireless communication in the own cell is also predicted according to the usage status of the wireless resource. Specifically, using the current radio resource usage status of the own cell and the current radio resource usage status of other cells, a relational expression indicating the relationship between the two usage conditions is identified, and the identified relational expression And the boundary line indicating the relationship between the usage status of the own cell and the usage status of other cells according to the boundary of availability, and it is known to make a prediction regarding the availability of wireless communication (for example, Non-patent document 1).

  In addition, in order to improve the prediction accuracy of such accommodation availability, it is also known to adjust the boundary line depending on whether or not the wireless communication can be accommodated by assigning radio resources according to the prediction (for example, non-patent literature) 2).

JP 2014-209701 A

Mariko Sekiguchi, Hitoshi Yano, Masayuki Ariyoshi, Kiyoshi Kobayashi, “Achieving QoS Forecast Techniques for Wireless LANs for Improving Application Operation Quality in Frequency Sharing Environments”, IEICE, Software Radio Society (SR), SR2013-36, p91-98, July 2013 Hitoshi Yano, Mariko Sekiguchi, Masayuki Ariyoshi, Kiyoshi Kobayashi, “Prediction of Predictable Application in Consideration of Required QoE Satisfaction Rate in Wireless LAN”, IEICE, Software Radio Society, Vol. 113, no. 400, p43-50, SR2013-85, January 2014

  According to the above-described conventional example, it is possible to allocate radio resources so that the request QoE related to radio communication is satisfied. However, for example, when an excessive amount of applications are operated in the cell, it may happen that a radio communication opportunity is not given to some applications. In that case, QoE will not be satisfied for that application.

  The present invention has been made in response to such a problem, and can be accommodated as a whole of a plurality of wireless communication systems having a wireless base station and a terminal device that performs wireless communication with the wireless base station. An object is to provide a management server or the like that can increase communication.

To achieve the above object, a management server according to the present invention is a management server that manages a plurality of wireless communication systems having a wireless base station and a terminal device that performs wireless communication with the wireless base station, and performs wireless communication. An uncommunication device identifier that identifies an uncommunication device that is a terminal device in which an uncommunication application that is an application that cannot be used, a priority of the uncommunication application, and an uncommitted for each radio base station to which the uncommunication device can be connected A receiving unit that receives a required resource amount that is a radio resource necessary for radio communication of a communication application, and an addable resource amount that is a radio resource that can be added by a use channel for each radio base station, and the receiving unit receives The new wireless base station to which the uncommunication device identified by the uncommunication device identifier A connection destination determining unit that determines the order of priority of the network and a connection that changes the connection destination according to the determination result by the connection destination determining unit to the uncommunication device that has been determined to connect to the new connection destination A connection destination change instruction transmission unit that transmits a destination change instruction, and the connection destination determination unit includes a new connection destination of the non-communication device in a radio base station to which the non-communication device can be connected. The wireless base station has a resource amount that can be added more than the required resource amount of the uncommunication application.
With such a configuration, by determining a new connection destination of an uncommunication device, an opportunity for wireless communication is given to an uncommunication application in the uncommunication device, so that QoE is satisfied. Become. In addition, by doing so, the wireless communication that can be accommodated can be increased as a whole of the plurality of wireless communication systems.

Further, in the management server according to the present invention, the connection destination determination unit sets a new connection destination of the non-communication device to a required resource amount of the non-communication application in the non-communication device among the radio base stations to which the non-communication device can be connected. May be determined as a radio base station having a minimum amount of additional resources and a minimum required resource amount.
With such a configuration, it is possible to minimize the amount of radio resources allocated when an uncommunication application in an uncommunication device starts radio communication. Note that a small amount of required resources for wireless communication of a certain application means that wireless communication is performed at a higher rate. Therefore, more efficient wireless communication can be performed by setting a wireless base station with the smallest amount of required resources as a new connection destination.

Further, in the management server according to the present invention, the reception unit also receives the amount of used resources that are radio resources used by the radio base station in each channel and the amount of resources that can be added in each channel of the radio base station, and For a wireless base station that performs wireless communication with an uncommunication device for which a secure connection destination has not been determined, a new resource is added to increase the amount of resources that can be added using the amount of resources used and the amount of resources that can be added for each channel related to the wireless base station. A channel determining unit that determines a used channel, and a channel change instruction transmitting unit that transmits a channel change instruction to change the used channel according to a determination result by the channel determining unit to a radio base station for which a new used channel has been determined And may be further provided.
With such a configuration, when the non-communication device cannot be resolved only by changing the connection destination, the number of non-communication devices can be reduced by changing the channel used.

Further, in the management server according to the present invention, the channel determination unit may determine a new channel to be used for a radio base station that performs radio communication with a larger number of non-communication devices for which a new connection destination has not been determined. .
A cell that includes more uncommunication devices for which a new connection destination has not been determined is likely to be able to perform wireless communication. By doing so, it becomes possible to give a transmission opportunity to an uncommunication device included in such a cell.

Further, in the management server according to the present invention, the channel determination unit calculates, for each radio base station, a total value of values according to the priority of the non-communication application in the non-communication device that performs radio communication with the radio base station. A new used channel may be determined for the radio base station having the maximum value.
With such a configuration, when selecting a cell whose usage channel is to be changed, the priority of an application not given a transmission opportunity is also taken into consideration. For example, among the radio base stations having the same number of non-communication devices, radio base stations including a non-communication application with a high priority are to be changed.

In the management server according to the present invention, the receiving unit further includes a channel information transmitting unit that receives a channel used for each radio base station and transmits channel information indicating the channel used for each radio base station to the terminal device. Also good.
With this configuration, the terminal device that has received the channel information can scan only the channels used in the channel scan, and the time required for the channel scan in the terminal device can be shortened.

In addition, the terminal device according to the present invention is a terminal device that performs wireless communication with a wireless base station, and there is an uncommunication application that is an application that cannot perform wireless communication. A transmission rate acquisition unit that acquires a transmission rate, and a required resource amount that is a radio resource necessary for radio communication of an uncommunication application for each radio base station that can be connected to a terminal device, calculated according to the transmission rate, Information for enabling the wireless base station that performs wireless communication with the terminal device to transmit to the management server and the priority of the uncommunication application are transmitted to the wireless base station. If a connection base radio base station is determined, a connection destination change instruction is issued to change the connection destination according to the determination result by the management server. And a control unit that controls the wireless communication unit to change the connection destination wireless base station of the wireless communication unit in response to the connection destination change instruction when the wireless communication unit and the wireless communication unit receive the connection destination change instruction. Part.
With such a configuration, an uncommunication application can perform wireless communication by changing a connection destination wireless base station in accordance with a connection destination change instruction transmitted from the management server.

In the terminal device according to the present invention, the radio communication unit also receives channel information indicating the channel used by each radio base station transmitted from the management server, and the control unit is indicated by the channel information at the time of channel scanning. Only the used channel may be scanned.
With such a configuration, in the channel scan, by scanning only the used channel indicated by the channel information, it is possible to reduce the time required for the channel scan and to prevent a scan omission.

  According to the management server or the like according to the present invention, when the non-communication device changes the connection-destination radio base station, an opportunity for radio communication is also given to the non-communication application in the non-communication device. Will be satisfied. In addition, by doing so, it becomes possible to increase the number of applications and the amount of traffic that can be accommodated as a whole of the plurality of wireless communication systems.

The block diagram which shows the structure of the information communication system by embodiment of this invention The block diagram which shows the structure of the management server by the embodiment The block diagram which shows the structure of the wireless base station by the embodiment The block diagram which shows the structure of the terminal device by the embodiment The flowchart which shows operation | movement of the management server by the embodiment The flowchart which shows operation | movement of the management server by the embodiment The flowchart which shows operation | movement of the management server by the embodiment A flowchart showing the operation of the radio base station according to the embodiment The flowchart which shows operation | movement of the terminal device by the embodiment The figure for demonstrating acquisition of the amount of resources which can be added in the embodiment The figure for demonstrating the radio | wireless communication after the change of the connecting point in the embodiment The figure which shows an example of the radio | wireless resource amount for every channel in the embodiment Schematic diagram showing an example of the appearance of the computer system in the embodiment The figure which shows an example of a structure of the computer system in the embodiment

  Hereinafter, a management server, a radio base station, and a terminal device according to the present invention will be described using embodiments. In the following embodiments, components and steps denoted by the same reference numerals are the same or equivalent, and repetitive description may be omitted. The management server according to the present embodiment changes the wireless base station to which the terminal device is connected or changes the channel used by the wireless base station in wireless communication.

  FIG. 1 is a block diagram showing a configuration of an information communication system according to the present embodiment. The information communication system according to the present embodiment includes a management server 1, radio base stations 2-1 and 2-2, and terminal devices 3-1 to 3-4. Note that a radio communication system including one radio base station and one or more terminal devices may be hereinafter referred to as a cell. The management server 1 and the wireless base stations 2-1 and 2-2 are connected via a wired or wireless communication line 500. The communication line 500 may be, for example, the Internet, an intranet, a public telephone line network, or the like. The wireless base station 2-1 and the terminal devices 3-1 and 3-2 perform wireless communication, and the wireless base station 2-2 and the terminal devices 3-3 and 3-4 perform wireless communication. . The radio base stations 2-1 and 2-2 may be access points, for example, or may be other radio base stations. Moreover, the terminal devices 3-1 to 3-4 may be stations or other terminal devices, for example. The terminal devices 3-1 to 3-4 may be, for example, personal computers, tablet terminals, smartphones, and the like. In the present embodiment, a case where the wireless communication is wireless communication in an autonomous distributed wireless communication system will be mainly described. In the present embodiment, the case where the wireless communication is wireless LAN communication will be mainly described, but this need not be the case. For example, ZigBee (registered trademark) communication (IEEE802.15.4) may be used. Moreover, although FIG. 1 shows the case where the management server 1 manages two wireless communication systems, this need not be the case. The management server 1 may manage three or more wireless communication systems. Moreover, although FIG. 1 shows a case where each wireless communication system includes two terminal devices, this need not be the case. If the wireless communication system includes one or more terminal devices, the number of the terminal devices is not limited. In addition, when it is not particularly necessary to distinguish, the radio base stations 2-1 and 2-2 may be referred to as the radio base station 2 and the terminal devices 3-1 to 3-4 may be referred to as the terminal device 3. .

  FIG. 2 is a block diagram showing the configuration of the management server 1 according to this embodiment. In FIG. 2, the management server 1 manages a plurality of wireless communication systems, and includes a reception unit 11, a storage unit 12, a connection destination determination unit 13, a connection destination change instruction transmission unit 14, and a channel determination unit. 15, a channel change instruction transmission unit 16, and a channel information transmission unit 17.

  The receiving unit 11 receives information related to the non-communication device and information related to the radio base station 2 and accumulates them in the storage unit 12. Note that the non-communication device is a terminal device 3 in which an uncommunication application, which is an application incapable of performing wireless communication due to no opportunity for communication, is present. Therefore, even if it is a non-communication device, there may be another application in which wireless communication is performed. Inability to perform wireless communication means that, for example, wireless communication is congested and there are no wireless resources, and thus wireless communication cannot be performed. Other applications may perform wireless communication that satisfies QoE. In order to be able to perform, it may be restricted to perform wireless communication. The terminal device 3 in which the uncommunication application exists may be, for example, the terminal device 3 that is executing the uncommunication application or the terminal device 3 that desires to execute it. In the following description, the amount of radio resources is usually the amount of radio resources in the time direction. The amount of the radio resource may be, for example, the ratio of radio resources in the time direction (for example, utilization rate), may be the time of radio resources per unit time (for example, utilization time), and the radio resource Other information regarding the time direction may be used. Further, the amount of radio resources may be a representative value of the amount of radio resources, for example. The representative value may be, for example, an average value or a median value.

  The information on the non-communication device received by the receiving unit 11 includes a non-communication device identifier for identifying the non-communication device, a priority of the non-communication application in the non-communication device, and a radio base station to which the non-communication device can be connected It is assumed that a required resource amount, which is a radio resource necessary for radio communication of the uncommunication application, is included every two. The non-communication device identifier may be, for example, an IP address and a port number of the non-communication device, or may be a physical address (for example, a MAC address) of the non-communication device, or can identify the non-communication device. Other information may also be used. The priority of the application may be, for example, a numerical value determined for each application (for example, an integer in the range of 0 to 10), or information indicating the type of application (for example, voice communication, video communication) Etc.). In the latter case, it is preferable that the application type and the application priority are associated with each other separately. Specifically, the priority of the voice communication application may be “9”, and the priority of the video communication application may be “6”. In addition, since the required resource amount is information for each radio base station 2 to which the non-communication device can be connected, the receiving unit 11 includes, for example, a base station identifier for identifying the radio base station 2 and Information that associates the required resource amount for wireless communication with the base station 2 may be received and stored in the storage unit 12. The base station identifier may be, for example, the SSID (Service Set ID), the ESSID (Extended SSID), the BSSID (Basic Service Set ID) of the radio base station 2, Other identifiers that can identify the station 2 may be used. Strictly speaking, the radio base station 2 to which the non-communication device can be connected includes the radio base station 2 that is currently performing radio communication. The required resource amount of the non-communication application for each wireless base station 2 to which can be connected does not include the required resource amount of the non-communication application of the wireless base station 2 where the non-communication device is currently performing wireless communication. May be. The receiving unit 11 normally receives information on the non-communication device from the radio base station 2, but this need not be the case. Moreover, the transmission source of the information regarding the non-communication device may be, for example, the radio base station 2 or the terminal device 3. Further, the non-communication device identifier received by the reception unit 11 and the base station identifier of the radio base station 2 that transmitted the non-communication device identifier may be associated with each other and stored in the storage unit 12. This is because, by using the correspondence relationship, it is possible to know which radio base station 2 the non-communication apparatus is performing radio communication with.

  Information related to the radio base station 2 received by the receiving unit 11 includes information necessary for determining a connection destination, which will be described later, and information necessary for determining a channel. Information necessary for determining the connection destination is the amount of resources that can be added in the used channel for each radio base station 2. The used channel is a channel used in the radio communication performed by each radio base station 2. The addable resource amount is a radio resource that can be added. The information necessary for determining the channel is the amount of resource used that is a radio resource that a certain radio base station 2 uses in each channel, and the amount of resource that can be added in each channel of the radio base station 2. Information necessary for channel determination may be received only from the radio base station 2 that is the target of channel determination, or may not be. In the latter case, the receiving unit 11 may receive information necessary for determining a channel from each radio base station 2, for example. In that case, the receiving unit 11 receives information necessary for determining the channel, and as a result, also receives information necessary for determining the connection destination. The receiving unit 11 may also receive a use channel for each radio base station 2. Note that receiving the used channel may mean receiving information that allows the user to know the used channel as a result. For example, if the used channel is known by the amount of used resources for each channel (for example, when the channel having the largest amount of used resources is known to be the used channel), by indirectly receiving the used resource amount, It may be considered that the used channel has been received. In addition, for example, when the additional resource amount of the used channel and the additional resource amount of each channel are received separately, the additional resource amount of the used channel is included in the latter additional resource amount of each channel. It does not have to be.

  Note that the required resource amount received by the receiving unit 11 may be calculated by, for example, the radio base station 2 or the terminal device 3, or may be calculated by another device. Also, the usage resource amount and the additional resource amount received by the reception unit 11 may be acquired by the radio base station 2 or may be acquired by another device, for example. Even in the latter case, the acquisition is preferably performed near the radio base station 2.

  In addition, the receiving unit 11 may receive information transmitted from the radio base station 2 or the like in response to transmission of a transmission request from the management server 1. The transmission request may be transmitted from, for example, the connection destination change instruction transmission unit 14, the channel change instruction transmission unit 16, or the like, or may be transmitted from another transmission unit (not shown). In addition, the reception unit 11 accumulates the received information in the storage unit 12. The receiving unit 11 may or may not include a wired or wireless receiving device (for example, a modem or a network card) for receiving. The receiving unit 11 may be realized by hardware, or may be realized by software such as a driver that drives the receiving device.

  In the storage unit 12, information received by the reception unit 11 is stored. The storage in the storage unit 12 may be temporary storage in a RAM or the like, or may be long-term storage. The storage unit 12 can be realized by a predetermined recording medium (for example, a semiconductor memory, a magnetic disk, an optical disk, etc.).

The connection destination determination unit 13 determines a new connection destination radio base station 2 of the non-communication device identified by the non-communication device identifier received by the reception unit 11. The information used for this is the following (I) and (II).
(I) Information for each non-communication device is as follows.
・ Uncommunication device identifier ・ Priority of uncommunication application ・ Required resource amount for each connectable radio base station 2 (II) Addable resource amount in use channel for each radio base station 2

The connection destination determination unit 13 has a new connection destination of the non-communication device, and among the radio base stations 2 to which the non-communication device can be connected, there is an additional resource amount that is greater than the required resource amount of the uncommunication application in the non-communication device The radio base station 2 is determined. Specifically, the connection destination determination unit 13 sorts the non-communication device identifiers so as to be in descending order of priority of the non-communication application. Then, a new connection destination is determined in the following order from the non-communication device identified by the first non-communication device identifier after sorting. First, a required resource amount for each radio base station 2 to which a non-communication apparatus, which is a new connection destination determination target, can be connected and an addable resource amount for each radio base station 2 are acquired. It is assumed that the required resource amount or the like is not acquired for the radio base station 2 in which the non-communication device is currently performing radio communication. Then, the connection destination determination unit 13
It is determined whether there is a radio base station 2 that satisfies the amount of resource that can be added ≧ the amount of required resource. The addable resource amount and the required resource amount to be compared correspond to the same radio base station 2. When only one such radio base station 2 exists, the connection destination determination unit 13 sets the radio base station 2 as a new connection destination of the non-communication device. On the other hand, when there are two or more such wireless base stations 2, the connection destination determination unit 13 selects one of the two or more wireless base stations 2 as a new connection destination. 2 is selected, and the selected radio base station 2 is set as a new connection destination of the non-communication device. In the selection, for example, the connection destination determination unit 13 may select the radio base station 2 with the smallest amount of required resources, may select the radio base station 2 with the largest amount of additional resources, or randomly You may make a selection, or you may make other selections. When the wireless base station 2 with the smallest amount of required resources is selected, when the uncommunication device performs wireless communication at a new connection destination, the wireless resources necessary for the wireless communication are minimized. Therefore, from the viewpoint of efficiently using radio resources, it is preferable to select the radio base station 2 with the minimum required resource amount. Then, the connection destination determination unit 13 subtracts the required resource amount from the addable resource amount of the radio base station 2 that becomes the new connection destination. More precisely, the connection destination determination unit 13 corresponds to the radio base station 2 that has become the new connection destination out of the required resource amount corresponding to the uncommunication application in the uncommunication apparatus for which the new connection destination has been determined. Identify required resource quantity. Then, the connection destination determination unit 13 subtracts the specified required resource amount from the addable resource amount of the radio base station 2 that becomes the new connection destination. Thereafter, the connection destination determination unit 13 repeats the same processing for the next non-communication device.

  If there are two or more non-communication applications in the non-communication device for which a new connection destination is to be determined, the above processing is performed using the total amount of required resources of the two or more non-communication applications. Is preferred. Also, if there is an application that is already performing wireless communication in an uncommunication device that is the target for determining a new connection destination, the result of adding the required resource amount for that application to the required resource amount of the uncommunication application It is preferable that the above processing is performed using a certain required resource amount. In that case, after the new connection destination is determined, the connection destination determination unit 13 has already performed wireless communication for the amount of resources that can be added by the wireless base station 2 with which the non-communication device has performed wireless communication. It is preferable to increase the required resource amount related to the application.

  The connection destination change instruction transmission unit 14 transmits a connection destination change instruction for changing the connection destination according to the determination result by the connection destination determination unit 13 to an uncommunication apparatus that has been determined to connect to a new connection destination. To do. The connection destination change instruction preferably includes the base station identifier of the radio base station 2 which is a new connection destination. If the connection destination change instruction is received by the non-communication device as a result, for example, the non-communication device may be transmitted as the transmission destination, or the wireless base station performing wireless communication with the non-communication device The station 2 may be transmitted as a transmission destination. For example, when the non-communication device identifier is associated with the address of the terminal device 3 identified by the non-communication device identifier, the connection destination change instruction transmission unit 14 determines a new connection destination. The connection destination change instruction may be transmitted with the address corresponding to the uncommunication device identifier of the uncommunication device as a transmission destination. Further, the connection destination change instruction may include a non-communication device identifier that identifies the terminal device 3 (non-communication device) connected to the new radio base station 2. In this case, the connection destination change instruction is, for example, an uncommunication device identifier that identifies an uncommunication device that is connected to a new radio base station 2 and an uncommunication device that is identified by the uncommunication device identifier is newly connected. It may be information associating with a base station identifier for identifying the radio base station 2 to be operated. In this case, one connection destination change instruction may include information regarding all uncommunication apparatuses whose connection destinations are to be changed, and the connection destination change instruction may be transmitted by broadcast.

  The connection destination change instruction transmission unit 14 may perform transmission by using an address held in a recording medium (not shown) as a transmission destination, or an address received from another component or another server before transmission. May be transmitted as a transmission destination. In addition, the connection destination change instruction transmission unit 14 may or may not include a transmission device (for example, a modem or a network card) for performing transmission. In addition, the connection destination change instruction transmission unit 14 may be realized by hardware, or may be realized by software such as a driver that drives the transmission device.

  The channel determination unit 15 uses, for the radio base station 2 that performs radio communication with an uncommunication device for which a new connection destination has not been determined, the use resource amount and the addable resource amount of each channel related to the radio base station 2, A new channel is determined so that the amount of resources that can be added increases. When the used channel is changed, wireless communication is temporarily interrupted, and QoE can be lowered. Therefore, when the uncommunication device does not disappear even when the connection destination is changed, the channel used in units of cells is changed. In addition, the change of the use channel is normally performed only for one cell (radio base station 2). Therefore, when there are two or more radio base stations 2 that perform radio communication with an uncommunication device for which a new connection destination has not been determined, the radio from which the two or more radio base stations 2 are to be used is changed. The base station 2 may be selected. In the radio base station 2 to be selected, it is necessary to increase at least the amount of resources that can be added by changing the use channel.

Here, a method for determining whether or not there is a new use channel in which the amount of resources that can be added is increased will be described. In a certain radio base station 2, it is assumed that the amount of resources used for each channel is A (CH) and the amount of resources that can be added for each channel is B (CH). Note that CH is a channel. Then, the available resource amount is A (CH) + B (CH). Therefore, the channel determination unit 15
A (CH) + B (CH)> A (used CH) + B (used CH)
It is determined whether or not a channel CH to be present exists. The “used CH” is a currently used channel. Then, when such a channel CH exists, the channel determination unit 15 determines that the radio base station 2 has a new used channel that increases the amount of resources that can be added, and determines that the radio base station 2 The channel change candidate radio base station 2 may be used. The channel determination unit 15 may use, for example, the channel CH having the largest A (CH) + B (CH) among the channels CH satisfying the above relationship as a new used channel, or other channel base station 2 The channel CH farthest from the use channel may be set as a new use channel.

  Next, a method of selecting the radio base station 2 that actually changes the channel from the radio base stations 2 that are channel change candidates will be described. For example, the channel determination unit 15 may determine a new channel to be used for the radio base station 2 that performs radio communication with a larger number of non-communication devices for which a new connection destination has not been determined. More than that means more than the other radio base stations 2. For example, among the radio base stations 2 that are channel change candidates, the radio base station 2 that performs radio communication with the largest number of uncommunication terminals may be selected as the radio base station 2 that performs channel change. Further, the channel determination unit 15 calculates, for each wireless base station 2, a total value of values according to the priority of the uncommunication application in the uncommunication device that performs wireless communication with the wireless base station 2, and the total value is the maximum. A new channel may be determined for the wireless base station 2 that is. That is, the radio base station 2 that changes the channel may be selected in consideration of the priority of the non-communication application. Note that the value corresponding to the priority of the uncommunication application is a value that increases as the priority increases. The value may be, for example, the priority itself, or may be a value of an increasing function with the priority as an argument. Moreover, the channel determination part 15 may select the radio base station 2 which actually changes a channel from the channel change candidate radio base stations 2 by other methods. For example, when the management server 1 can know the non-communication period in which the non-communication application is not communicating, the uncommunication in which the uncommunication application having the longest non-communication period exists from the channel change candidate radio base station 2 The radio base station 2 that performs radio communication with the apparatus may be selected. Alternatively, the radio base station 2 may be selected at random from the channel change candidate radio base stations 2.

  In the above description, a method for selecting a radio base station 2 that actually performs channel change after specifying a channel change candidate has been described, but this need not be the case. Depending on the selection criteria, it may be determined whether there is a new channel that increases the amount of resources that can be added in the order of the radio base stations 2 that are most likely to be selected. For example, when the selection criterion is to perform wireless communication with a larger number of non-communication devices, the channel determination unit 15 performs wireless communication with a non-communication device for which a new connection destination has not been determined. 2, it is possible to determine whether or not there is a new usage channel in which the amount of resources that can be added increases in the order of the number of uncommunication devices, and the radio base station 2 having the new usage channel may be a channel change target. In this case, for example, only the radio base station 2 to be determined may be requested to transmit information necessary for channel determination.

  The channel change instruction transmitting unit 16 transmits a channel change instruction for changing the used channel according to the determination result by the channel determining unit 15 to the radio base station 2 for which a new used channel has been determined. The channel change instruction preferably includes a new used channel. In addition, the channel change instruction may include information related to the timing for changing the used channel. The information about the timing may be, for example, a time (period) from when a channel change instruction is received to when the used channel is changed, or a time when the used channel is changed.

  The channel change instruction transmission unit 16 may perform transmission by using an address held in a recording medium (not shown) as a transmission destination, or an address received from another component or another server before transmission. You may transmit as a transmission destination. Further, the channel change instruction transmission unit 16 may or may not include a transmission device (for example, a modem or a network card) for performing transmission. The channel change instruction transmission unit 16 may be realized by hardware, or may be realized by software such as a driver that drives the transmission device.

  The channel information transmission unit 17 transmits channel information indicating the channel used by each radio base station 2 to the terminal device 3. The transmission timing does not matter, but it is preferable that the transmission is performed so that there is no wrinkle between the used channel indicated by the channel information received by each terminal device 3 and the actual used channel. Therefore, for example, the channel information may be periodically transmitted, or when the wireless communication by the new wireless base station 2 is started or when the channel used by the wireless base station 2 is changed, the channel information is May be sent. Note that a channel scan in each terminal device 3 is performed for the used channel indicated by the channel information. As a result, the time required for the channel scan can be shortened. In addition, since channel information is transmitted for such a purpose, the channel information may be information on a channel used for the radio base station 2 in a range where radio waves reach (a range where radio waves can interfere). For example, when a wireless communication system in a very wide area is managed by the management server 1, each wireless communication system is grouped for each range of radio waves, and channel information is transmitted for each group. Good. If the channel information is received by each terminal device 3 as a result, for example, each terminal device 3 may be transmitted as a transmission destination, and the radio base station 2 performing radio communication with each terminal device 3 may be used. May be transmitted as a transmission destination, or may be transmitted by broadcast.

  The channel information transmission unit 17 may perform transmission by using an address held in a recording medium (not shown) as a transmission destination, or transmit an address received from another component or another server before transmission. Transmission may be performed as a destination. Further, the channel information transmission unit 17 may or may not include a transmission device (for example, a modem or a network card) for performing transmission. The channel information transmission unit 17 may be realized by hardware, or may be realized by software such as a driver that drives a transmission device.

  FIG. 3 is a block diagram showing a configuration of radio base station 2 according to the present embodiment. In FIG. 3, the wireless base station 2 communicates with the management server 1 via the communication line 500 and wirelessly communicates with the terminal device 3. The wireless base station 2, the communication unit 22, the control unit 23, The required resource acquisition unit 24, the use resource acquisition unit 25, and the addable resource acquisition unit 26 are provided.

  The wireless communication unit 21 performs wireless communication with the terminal device 3. Note that the wireless communication unit 21 may or may not include a wireless communication device for performing communication. The wireless communication unit 21 may be realized by hardware, or may be realized by software such as a driver that drives a communication device.

  The communication unit 22 communicates with the management server 1 via the communication line 500. The communication unit 22 may or may not include a wired or wireless communication device for performing communication. The communication unit 22 may be realized by hardware, or may be realized by software such as a driver that drives a communication device.

  The control unit 23 performs control related to the wireless communication unit 21 and the communication unit 22. For example, when the communication unit 22 receives data to which the terminal device 3 in the LAN is a transmission destination, the control unit 23 transmits the data to the terminal device 3 via the wireless communication unit 21. You may control. In addition, for example, when the wireless communication unit 21 receives data that is a destination of a WAN device, the control unit 32 transmits the data to the destination device via the communication unit 22. You may control. Further, the control unit 23 controls transmission by the wireless communication unit 21 according to the result of carrier sense using the wireless communication unit 21. Specifically, the control unit 23 determines whether wireless communication is performed on the transmission path according to the result of carrier sense, and performs wireless transmission when wireless communication is not performed. 21 may be controlled. The control by the control unit 23 may be, for example, CSMA / CA (Carrier Sense Multiple Access / Collision Avoidance) control or CSMA / CD (Carrier Sense Multiple Access / Collision Detection) control. In the present embodiment, the former case will be mainly described. Note that it is already known to control communication according to the result of carrier sense, and a detailed description thereof will be omitted.

  The required resource acquisition unit 24 is configured so that the wireless communication unit 21 acquires the transmission rate for each connectable wireless base station 2 acquired by the terminal device 3 which is an uncommunication device, and the offer of an uncommunication application in the terminal device 3. When a load (offered load) or an average packet size is received, the required resource amount for each radio base station 2 to which a non-communication device can be connected is acquired using the transmission rate or the like. The offered load will be described later. The required resource acquisition unit 24 may, for example, perform a process of acquiring the required resource amount for each connectable radio base station 2 for all uncommunication devices with which the radio communication unit 21 performs radio communication. The process for acquiring the required resource amount will be described later. The required resource amount is transmitted to the management server 1 via the communication unit 22.

  The usage resource acquisition unit 25 acquires the usage resource amount in each channel of the radio base station 2. The process for acquiring the amount of used resources will be described later. It is assumed that the usage resource amount is transmitted to the management server 1 via the communication unit 22.

  The addable resource acquisition unit 26 acquires the addable resource amount of the use channel of the radio base station 2 using the use resource amount of the use channel acquired by the use resource acquisition unit 25. The acquisition may be performed, for example, for determining a new connection destination of an uncommunication device. Further, the addable resource acquisition unit 26 acquires the addable resource amount in each channel of the radio base station 2 using the use resource amount of each channel acquired by the use resource acquisition unit 25. The acquisition may be performed, for example, for determination of a new use channel of the radio base station 2. As described above, when the addable resource amount in each channel of the radio base station 2 is acquired, the addable resource amount of the used channel is also acquired. Therefore, the addable resource acquisition unit 26 may only acquire the addable resource amount in each channel of the radio base station 2. The process of acquiring the addable resource amount will be described later. It is assumed that the addable resource amount is transmitted to the management server 1 via the communication unit 22.

  FIG. 4 is a block diagram showing a configuration of the terminal device 3 according to the present embodiment. In FIG. 4, the terminal device 3 performs wireless communication with the radio base station 2 and includes a radio communication unit 31, a control unit 32, a transmission rate acquisition unit 33, and a processing unit 34.

  The wireless communication unit 31 performs wireless communication with the wireless base station 2. For example, the wireless communication unit 31 performs wireless communication using the transmission rate for each wireless base station 2 acquired by the transmission rate acquisition unit 33, the priority of the uncommunication application, the offered load, the average packet size, and the like. You may transmit to the wireless base station 2. FIG. The offered load and the average packet size are used for calculating the required resource amount as described above. The wireless communication unit 31 may receive the connection destination change instruction, the channel change instruction, and the channel information transmitted from the management server 1 via the wireless base station 2. Note that the wireless communication unit 31 may or may not include a wireless communication device for performing communication. The wireless communication unit 31 may be realized by hardware, or may be realized by software such as a driver that drives a communication device.

  The control unit 32 performs control related to the wireless communication unit 31. For example, when there is data to be transmitted, the control unit 32 may control the data to be transmitted via the wireless communication unit 31. For example, when the wireless communication unit 31 receives data from the wireless base station 2, the control unit 32 may pass the data to the processing unit 34. Further, for example, when the wireless communication unit 31 receives a connection destination change instruction, the control unit 32 changes the connection destination wireless base station 2 of the wireless communication unit 31 according to the connection destination change instruction. You may control. For example, when the wireless communication unit 31 receives a channel change instruction, the control unit 32 uses the channel used by the wireless communication unit 31 in wireless communication with the wireless base station 2 according to the channel change instruction. You may control to change. Similarly to the control unit 23, the control unit 32 controls transmission by the wireless communication unit 31 according to the result of carrier sense using the wireless communication unit 31. In addition, when the wireless communication unit 31 receives channel information, the control unit 32 may scan only the used channel indicated by the channel information in subsequent channel scans. By doing so, the time required for the channel scan can be shortened. In addition, when channel information is received many times, it is preferable to perform channel scanning using the latest channel information.

  The transmission rate acquisition unit 33 acquires a transmission rate for each connectable wireless base station 2 when there is an uncommunication application that is an application that cannot perform wireless communication. The transmission rate acquisition unit 33 acquires, for example, the RSSI (reception signal strength) of a beacon transmitted from the connectable radio base station 2, and stores the RSSI and the transmission rate (bps) stored in a recording medium (not shown). Is used (for example, a table for associating both) and the transmission rate for performing wireless communication with the wireless base station 2 is acquired. The transmission rate is strictly a downlink transmission rate. Therefore, the uplink transmission rate may be estimated using the downlink transmission rate. The uplink transmission rate may be estimated, for example, by adding a predetermined offset to the downlink transmission rate, or using the obtained downlink RSSI plus the predetermined offset. May be. The offset may be a positive value, a negative value, or 0. The offset value is preferably set in consideration of the characteristics of each terminal device 3. For example, for a terminal device 3 that is considered to be transmitted with a larger transmission power than the radio base station 2, the offset may be a positive value, and for a terminal device 3 that is considered to be transmitted with a smaller transmission power than the radio base station 2. The offset may be a negative value. The transmission rate acquired by the transmission rate acquisition unit 33 is transmitted to the radio base station 2 via the radio communication unit 31.

  The processing unit 34 performs processing related to received information and transmitted information. The process may be an application process. The processing unit 34 may perform the processing for each application. For example, when voice communication is performed, the processing unit 34 accumulates packets according to the audio signal in a transmission queue (not shown) or receives packets according to the voice communication received by the wireless communication unit 31. Application processing related to the voice communication may be performed.

  In addition, although this Embodiment demonstrates the case where the transmission rate is acquired in the terminal device 3 and the required resource amount using the transmission rate is acquired in the wireless base station 2, it does not need to be so. For example, the terminal device 3 may acquire a transmission rate and acquire a required resource amount using the transmission rate. That is, the information transmitted from the terminal device 3 to the radio base station 2 may be information that can acquire the required resource amount as a result, specifically, may be a transmission rate, or may be required. It may be the resource amount itself. Therefore, the radio base station 2 that performs radio communication with the terminal device 3 uses the management server to calculate the required resource amount for each radio base station 2 to which the terminal device 3 can be connected, which is calculated according to the transmission rate. It may be considered that information that can be transmitted to 1 is transmitted to the radio base station 2.

  Next, a required resource amount acquisition process by the required resource acquisition unit 24, a use resource amount acquisition process by the use resource acquisition unit 25, and an addable resource amount acquisition process by the addable resource acquisition unit 26, respectively. explain.

[Obtain required resource amount]
A method for calculating the required resource amount using offered load, transmission rate, and the like will be described. The offered load is a traffic volume that a device that performs wireless communication intends to transmit, and may be considered to be, for example, a requested data rate of an application layer. For example, when an application requests 10 Mb / s wireless communication, the offered load is “10 Mb / s”. Assuming that no retransmission occurs, the transmission time of data and ACK for the data is the usage time of the radio resource, so the radio resource usage rate ρ _{s, n} of the application _n is _expressed by the following equation: .
ρ _{s, n} = Σ {(transmission time of data frame of application n + time required for ACK of data frame of application n) / MT}

MT is a measurement period for calculating a radio resource utilization rate. Also, Σ in the above equation is the sum for the data frame of application n transmitted during the MT period. Therefore, the above equation becomes as follows.
ρ _{s, n} = N _{DATA, n} × (D _{DATA, n} + D _{ACK, n} ) (1)

Here, N _{DATA, n} is the number of data frames that application n transmits in a unit time during the measurement period, D _{DATA, n} is an average time required to transmit a data frame of application n, and D _{ACK, n} Is the time taken to ACK the data frame of application n. D _{ACK, n} is a time uniquely determined only by the transmission rate of ACK. N _{DATA, n} and D _{DATA, n in the} equation (1) are respectively _expressed by the following equations. Incidentally, _{O n} is an offered load of the application _{n (b / s), L} avg, n is the average packet size of the application n (Byte). In the case of application packets exceeding the MTU size, the average IP packet size may be assumed to be the MTU size. D _fixed is a physical layer overhead (preamble length) independent of the transmission rate, L _fixed is an overhead other than the physical layer dependent on the transmission rate, and R _n is a transmission rate (b / s). Note that in the application n, when only one of the uplink and downlink radio communications is performed, the transmission rate R _n may be an uplink or downlink transmission rate at which the radio communication is performed. On the other hand, the application n, when the wireless communication both uplink and downlink is performed, the transmission rate R _n may be one obtained by adding the transmission rate of the uplink and downlink wireless communication is performed.
_{N DATA, n = O n /} (L avg, n × 8)
D _{DATA, n} = D _fixed + (L _{avg, n} × 8 + L _fixed ) / R _n

Therefore, the radio resource utilization rate of equation (1) is as follows:
_{ρ s, n = coef n ×} O n / R n
However, coef _n is as follows.
coef _n = 1 + {(D _fixed + D _{ACK, n} ) × R _n + L _fixed } / (L _{avg, n} × 8)

In this manner, the required resource acquisition unit 24 can calculate the required resource amount of the uncommunication application from the offered load, transmission rate, and average packet size of the uncommunication application. The offered load and average packet size may be obtained from an uncommunication application. The transmission rate is acquired for each connectable radio base station 2 by the transmission rate acquisition unit 33 of the terminal device 3. The required resource acquisition unit 24 calculates the required resource amount for each radio base station 2 to which the uncommunication device can be connected. Note that from the 802.11g data frame format, D _fixed is 16 + 4 = 20 (μs), and L _fixed is {(2 + 24 + 8 + 20 + 8 + 4) × 8 + 6} = 534 (bit). Here, for simplification of description, the padding region is not considered.

[Obtain resource usage]
A method for acquiring the usage resource amount will be described. Here, the used resource amount to be acquired is referred to as the current own cell used resource amount. The own cell is a cell of the radio base station 2 having the use resource acquisition unit 25.

  The use resource acquisition unit 25 acquires a current own cell use resource amount that is a current use amount of radio resources of the own cell with which the radio base station 2 performs radio communication. This current own cell utilization resource amount may be the latest in the own cell or may be new enough to be identified with the latest one. The utilization rate of the radio resource of the own cell is a value obtained by dividing the time when a device belonging to the own cell performs radio communication by the observation time of the radio communication. The use time of the radio resource of the own cell is the time when a device belonging to the own cell performs radio communication during an observation period which is a unit time. Note that the scheduled use period (NAV period: Network Allocation Vector period) of the radio signal included in the radio signal may or may not be included in the time during which radio communication is performed. Further, the current own cell usage resource amount is usually information for each channel. In the present embodiment, it is assumed that processing such as acquisition of the current own cell usage resource amount is performed for a predetermined time length (hereinafter sometimes referred to as “control slot”).

  The usage resource acquisition unit 25 may acquire the current own cell usage resource amount according to the carrier sense, and calculates the current own cell usage resource amount according to the offered load of radio communication in the own cell. Alternatively, the current own cell usage resource amount may be received from another device. When acquiring the current own cell usage resource amount according to carrier sense, it is necessary to distinguish between the radio signal of the own cell and the radio signal of another cell in the sensing result. The radio signal of the own cell and the radio signal of another cell can be distinguished. When calculating the current own cell usage resource amount according to the offered load of radio communication in the own cell, the used resource acquisition unit 25 performs the radio communication in the same manner as the calculation of the required resource amount described above. The current own cell utilization resource amount may be calculated by calculating the radio resource amount for each application in the own cell and calculating the total thereof. The used resource acquisition unit 25 may receive, for example, the offered load of the own cell from the application layer of the own device, may be received from another device, or may be predicted. As a case of receiving from another device, for example, the radio base station 2 may receive an offered load from each terminal device 3 in its own cell. Moreover, as a case where it estimates, for example, when estimating application traffic based on the traffic pattern of the own cell (for example, when estimating that it is VoIP of U (Kb / s) about a certain wireless communication), In some cases, the throughput of each traffic in the own cell is estimated and the throughput is set as the offered load of the own cell. In addition, when calculating the present own cell utilization resource amount using offered load, information, such as the transmission rate of the traffic according to the offered load, packet size, is also required. Regarding the transmission rate, for example, the wireless base station 2 naturally knows the transmission rate of wireless communication with each wireless terminal device. The use resource acquisition unit 25 can acquire the current own cell use resource amount regarding the use channel as described above. The used resource acquisition unit 25 may acquire the current own cell used resource amount of each channel according to the carrier sense of each channel, for example, or as described above. Using the current own cell usage resource amount acquired in this way, it may be acquired as follows. For example, the use resource acquisition unit 25 sets the current use channel and the current own cell use resource amount acquired for the use channel for a channel within ± N channels from the use channel, and 0 for other channels. It is good. N is an integer greater than or equal to 0, and may be N = 3, for example. It goes without saying that the value of N may be appropriately changed according to the situation such as the channel frequency interval and the frequency width of one channel. The value of N is preferably minimized under the condition that the channel currently affected by the current cell is included. For example, if the frequency width of a channel is 5 MHz and the bandwidth of one channel is 20 MHz, wireless communication on a certain channel affects about ± 2 channels. Conversely, when wireless communication is performed on a certain channel, it is affected by about ± 2 channels. Therefore, by setting N = 3, it is possible to correctly acquire the own cell usage resource amount for both the channel affected by the current own cell radio communication and the channel not affected. Instead of setting as such, for example, N = 2 may be set so that the amount of used resources is not 0 only for the range of channels that are actually affected. The acquired current own cell usage resource amount may be temporarily stored in a recording medium (not shown).

[Get amount of resources that can be added]
A method for acquiring the addable resource amount will be described. In order to acquire the addable resource amount, the addable resource acquisition unit 26 first acquires the current other cell use resource amount.

  The addable resource acquisition unit 26 first acquires the current other cell use resource amount that is the current radio resource use amount of another cell that may interfere with the own cell. The current other cell use resource amount may be the latest in other cells, or may be new enough to be identified with the latest one. The other cell may be one cell or two or more cells. The other cell is an interference cell for the own cell, for example, another cell adjacent to the own cell. The addable resource acquisition unit 26 may acquire the current other cell usage resource amount according to the carrier sense, or may receive the current other cell usage resource amount from another device. When acquiring the current resource usage amount of other cells according to the carrier sense, for example, the addable resource acquisition unit 26 excludes the communication period of the own cell from the usage period of the radio resource obtained from the sensing result. The current radio resource utilization rate and the current radio resource utilization time may be calculated using the period. The method for distinguishing the communication between the self and other cells in the sensing result is as described above. In addition, when acquiring the current resource usage amount of another cell using the sensing result, the addable resource acquisition unit 26 uses the resource usage amount corresponding to both the own cell and the other cell (that is, all the usage resources). The current other cell use resource amount that is a radio resource use state obtained by subtracting the current own cell use resource amount acquired by the use resource acquisition unit 25 may be acquired from the amount).

The addable resource acquisition unit 26 uses the current own cell use resource amount acquired by the use resource acquisition unit 25 and the current other cell use resource amount acquired by itself, and uses the own cell use resource amount and the other cell use resource. A relational expression indicating the relationship with the quantity is specified. The relational expression indicating the relationship between the own cell use resource amount and the other cell use resource amount passing through the current own cell use resource amount and the current other cell use resource amount is the current own cell use resource amount and the current other cell use amount. It changes according to the amount of resources used. Specifically, the slope and intercept of the relational expression, which are linear functions, change according to the current own cell usage resource amount and the current other cell usage resource amount that are the starting points. Therefore, the addable resource acquisition unit 26 uses the current own cell use resource amount and the current other cell use resource amount to indicate the relationship between the own cell use resource amount and the other cell use resource amount that pass through both. The formula will be specified. This relational expression is, for example, an expression showing a straight line extending from the lower left to the upper right in FIG. For details of the relational expression, see Non-Patent Document 1 above. As described in Non-Patent Document 1, the relational expression is
y = a (x + c) (2)
Can be described. Note that x is the own cell use resource amount, y is the other cell use resource amount, c is a predetermined constant, and a is the current own cell use resource amount and the current other cell use resource. It is a coefficient determined by the quantity. Here, the coefficient a is normally a positive value. This is because collision of radio signals increases with an increase in the amount of resources used by the own cell, and the amount of resources used by other cells also increases accordingly. From the above equation (2), when the current own cell usage resource amount and the current other cell usage resource amount are x1 and y1, respectively, the addable resource acquisition unit 26:
a = y1 / (x1 + c)
Thus, the value of the coefficient a can be determined, and as a result, the relational expression (2) can be specified. Note that, as described in Non-Patent Document 1, for example, c = 80.45.

The addable resource acquisition unit 26 can add using boundary information stored in a recording medium (not shown), the specified relational expression, and the current own cell use resource amount acquired by the use resource acquisition unit 25. Predict the amount of resources. As will be described later, the addable resource acquisition unit 26 uses the current own cell usage resource amount and the current other cell usage resource amount acquired in a certain control slot, and the control slot. The amount of addable resources is predicted using the current own cell utilization resource amount acquired in (1). Next, boundary information will be described. In FIG. 8, when the own cell use resource amount and the other cell use resource amount are on the lower left side of the boundary line, wireless communication in the own cell can be accommodated, and the own cell use resource amount and the other cell use resource amount are In the case of the upper right side from the boundary line, wireless communication in the own cell cannot be accommodated. Note that “accommodable” means that all traffic to be transmitted can satisfy a desired QoE. In other words, if it can be accommodated, a desired QoE is satisfied in each traffic of wireless communication. On the other hand, if it cannot be accommodated, the desired QoE is not satisfied in at least one of the traffics of wireless communication. For example, QoE may be satisfied when the throughput is greater than a threshold according to the offered load, and QoE may not be satisfied otherwise. The threshold according to the offered load may be, for example, the offered load itself or may be a value obtained by multiplying the offered load by a value close to 1. The boundary line is a line indicating the boundary between the use situation that can be accommodated and the use situation that cannot be accommodated. The information indicating the relationship between the own cell use resource amount and the other cell use resource amount corresponding to the boundary line is the boundary information. Therefore, as described above, when x is the own cell use resource amount and y is the other cell use resource amount, the equation corresponding to the boundary line is y = F (x) (3)
May be used as boundary information. The function F may be a linear function as shown in FIG. For example, when p and q are arbitrary real numbers, F (x) = px + q may be satisfied. That is,
y = px + q
It may be. In such a case, the boundary information may be information indicating p and q. In the present embodiment, the case where the boundary information is a linear function will be mainly described. The boundary line shown in FIG. 8 is, for example, the following equation (see Non-Patent Document 1).
y = −1.1 × x + 73.137

  Further, as described in Non-Patent Document 2, the addable resource acquisition unit 26 predicts the addable resource amount using the adjusted boundary information when the boundary information is adjusted. May be.

  The addable resource acquisition unit 26 acquires the maximum radio resource amount that can be accommodated in the own cell, and uses this to acquire the addable resource amount in the own cell. Since the boundary indicated by the boundary information indicates the accommodation limit, the maximum amount of radio resources that can be accommodated in the own cell (for example, x2 in FIG. 8) is obtained by calculating the intersection between the expressions (2) and (3). Can be obtained. Then, a value (for example, x2−x1) obtained by subtracting the current own cell utilization resource amount (for example, x1 in FIG. 8) acquired by the utilization resource acquisition unit 25 from the maximum radio resource amount is added in the own cell. The amount of possible resources. The addable resource acquisition unit 26 may acquire the addable resource amount not only for the used channel but also for each of the other channels. As described above, for the channel that is not affected by the wireless communication that the wireless base station 2 is currently performing, that is, the channel outside the channel ± N that the wireless base station 2 is currently using, the current own cell use The resource amount is zero. Therefore, if the current other cell use resource amount in the channel is y2, as shown in FIG. 8, the own cell use resource corresponding to the intersection of the relational expression passing through (0, y2) and the boundary line. The amount x3 is the amount of resources that can be added. Also, considering the increase in interference according to the increase in radio resources in the own cell, the result of subtracting the current own cell use resource amount from the own cell use resource amount according to the intersection of the relational expression and the boundary A smaller value may be used as the additional resource amount. The addable resource amount predicted by the addable resource acquisition unit 26 may be stored in a recording medium (not shown).

Next, the operation of the management server 1 will be described using the flowchart of FIG. 5A.
(Step S101) A transmission unit (not shown) of the management server 1 determines whether it is time to transmit a transmission request for requesting transmission of a required resource amount or the like. If it is time to transmit the transmission request, the process proceeds to step S102. If not, the process of step S101 is repeated until it is determined that the transmission request is transmitted. For example, the transmission unit may periodically determine to transmit a transmission request, or may determine to transmit a transmission request at a timing when a decrease in QoE is detected.

  (Step S <b> 102) A transmitting unit (not shown) transmits a transmission request to each radio base station 2.

  (Step S103) The receiving unit 11 determines whether information is received from the radio base station 2 in response to transmission of the transmission request. If the information is received, the process proceeds to step S104. If not, the process proceeds to step S105.

  (Step S <b> 104) The receiving unit 11 accumulates the received information in the storage unit 12.

  (Step S105) The connection destination determination unit 13 determines whether or not to end the reception process. If the reception process is to end, the process proceeds to step S106. If not, the process returns to step S103. For example, the connection destination determination unit 13 may determine that the reception process is terminated when a predetermined time has elapsed since the transmission request is transmitted, or information from all the radio base stations 2 is received. If it is received, it may be determined that the reception process is terminated.

  (Step S106) The connection destination determination unit 13 performs a process of determining the radio base station 2 that is a new connection destination of the non-communication device. Details of the processing will be described later with reference to the flowchart of FIG. 5B.

  (Step S107) The channel determination unit 15 determines whether there is an uncommunication device for which a new connection destination has not been determined after the process of Step S106. If there is such an uncommunication device, the process proceeds to step S108, and if not, the process proceeds to step S109.

  (Step S108) The channel determination unit 15 performs a process of determining a new channel to be used for the radio base station 2 that performs radio communication with an uncommunication apparatus for which a new connection destination has not been determined. Details of the processing will be described later with reference to the flowchart of FIG. 5C.

(Step S <b> 109) The channel information transmission unit 17 transmits channel information indicating the channel used by each radio base station 2 at that time to each radio base station 2. Then, the process returns to step S101.
Note that the processing is ended by powering off or interruption for aborting the processing in the flowchart in FIG. 5A.

FIG. 5B is a flowchart showing details of the process (step S106) for determining the radio base station 2 that is a new connection destination of the uncommunication apparatus in the flowchart of FIG. 5A.
(Step S201) The connection destination determination unit 13 sorts the non-communication device identifiers received by the reception unit 11 in descending order of priority of the non-communication application corresponding to the non-communication device identifier.

  (Step S202) The connection destination determination unit 13 sets a counter i to 1.

  (Step S <b> 203) The connection destination determination unit 13 can connect to a non-communication device identified by the sorted i-th non-communication device identifier (hereinafter also referred to as “i-th non-communication device”). For the base station 2, it is determined whether there is a radio base station 2 in which the amount of resources that can be added to the used channel is equal to or greater than the required resource amount. And when such a radio base station 2 exists, it progresses to step S204, and when that is not right, it progresses to step S207.

  (Step S204) When there are two or more radio base stations 2 in which the amount of resources that can be added to the use channel is equal to or greater than the required resource amount, the connection destination determining unit 13 selects the radio base station 2 having the minimum required resource amount, A new connection destination of the i-th non-communication device is determined. In addition, when there is one radio base station 2 in which the amount of resources that can be used for adding channels is equal to or greater than the required resource amount, the radio base station 2 is determined as a new connection destination of the i-th uncommunication device. The

  (Step S205) The connection destination change instruction transmission unit 14 transmits a connection destination change instruction for changing the connection destination to the radio base station 2 which is a new connection destination, to the i-th uncommunication device.

  (Step S206) The connection destination determination unit 13 determines the required resource amount when the i-th uncommunication device connects to the radio base station 2 from the addable resource amount of the radio base station 2 that has become the new connection destination. Subtract.

  (Step S207) The connection destination determination unit 13 increments the counter i by 1.

  (Step S208) The connection destination determination unit 13 determines whether there is an i-th non-communication device. If there is an i-th non-communication device, the process returns to step S203, and if not, the process returns to the flowchart of FIG. 5A.

FIG. 5C is a flowchart showing details of the process (step S108) for determining a new use channel in the flowchart of FIG. 5A.
(Step S301) The channel determination unit 15 sets the base station identifier of the radio base station 2 that is performing radio communication with the non-communication apparatus whose connection destination is not changed, and the radio base station 2 that is not performing radio communication. Sort in descending order of the number of communication devices.

  (Step S302) The channel determination unit 15 sets the counter j to 1.

  (Step S303) The channel determination unit 15 changes the channel used by the radio base station 2 identified by the sorted j-th base station identifier (hereinafter also referred to as “j-th radio base station 2”). Whether or not it is possible is determined using the amount of resource used and the amount of resources that can be added for each channel corresponding to the j-th radio base station 2. If the used channel can be changed, the process proceeds to step S304, and if not, the process proceeds to step S306.

  (Step S304) The channel determination unit 15 determines a new channel used by the j-th radio base station 2.

  (Step S305) The channel change instruction transmitting unit 16 transmits to the j-th radio base station 2 a channel change instruction for changing the use channel to the use channel determined in step S304. And it returns to the flowchart of FIG. 5A.

  (Step S306) The channel determination unit 15 increments the counter j by 1.

  (Step S307) The channel determination unit 15 determines whether or not the j-th radio base station 2 exists. If the j-th radio base station 2 exists, the process returns to step S303, and otherwise returns to the flowchart of FIG. 5A.

  In addition, in the flowchart of FIG. 5C, although the process in the case where the radio base station 2 that performs radio communication with more uncommunication devices is a target to change the use channel is shown, according to other criteria, As described above, the radio base station 2 whose use channel is to be changed may be determined.

Next, the operation of the radio base station 2 will be described using the flowchart of FIG.
(Step S401) The communication unit 22 determines whether a transmission request or the like has been received. If a transmission request or the like is received, the process proceeds to step S402. If not, the process proceeds to step S405. Note that the communication unit 22 receives, for example, a transmission request, a connection destination change instruction, a channel change instruction, channel information, and the like.

  (Step S402) The wireless communication unit 21 transmits the transmission request received in step S401 to the terminal device 3 that is performing wireless communication. In addition, when the transmission destination of the information to be transmitted is specified, the information may be transmitted only to the terminal device 3 that is the transmission destination.

  (Step S403) The control unit 23 determines whether the information received in step S401 is a channel change instruction. If it is a channel change instruction, the process proceeds to step S404; otherwise, the process returns to step S401.

  (Step S404) The control unit 23 changes the channel to be used in accordance with the received channel change instruction. In addition, since it is preferable that the process of changing the used channel is performed simultaneously with the process of changing the used channel in the terminal device 3, for example, the control unit 23 causes the wireless communication unit 21 to change the channel to each terminal device 3. You may perform the process which changes a use channel after progress of predetermined time after transmitting an instruction | indication, or the predetermined timing shown by the channel change instruction | indication. Then, the process returns to step S401.

  (Step S405) The radio communication unit 21 determines whether the transmission rate for each connectable radio base station 2, the priority of the non-communication application, and the like are received from the terminal device 3 that is an uncommunication device. If a transmission rate or the like has been received, the process proceeds to step S406. If not, the process proceeds to step S407.

  (Step S406) The required resource acquisition unit 24 acquires the required resource amount corresponding to the transmission rate received in step S405.

  (Step S <b> 407) The control unit 23 determines whether to transmit information such as the amount of used resources to the management server 1. And when transmitting, it progresses to step S408, and when that is not right, it returns to step S401. The control unit 23 may determine that the required resource amount or the like is to be transmitted to the management server 1 when, for example, the transmission rate or the fact that there is no uncommunication application has been received from all the terminal devices 3, and in step S402 It may be determined that the required resource amount or the like is transmitted to the management server 1 after a predetermined time has elapsed since the transmission request was transmitted. Further, after transmitting information to the management server 1 in response to the transmission request, the control unit 23 does not have to determine to transmit information to the management server 1 in step S407 until a new transmission request is received. Good.

  (Step S408) The usage resource acquisition unit 25 acquires the usage resource amount of each channel. If the transmission rate or the like has not been received in step S405, there is no uncommunication device in the cell of the radio base station 2, so that the channel used by the radio base station 2 is not changed. Therefore, in that case, the use resource acquisition unit 25 may acquire the use resource amount of only the use channel.

  (Step S409) The addable resource acquisition unit 26 acquires the addable resource amount of each channel. If the transmission rate or the like has not been received in step S405, there is no uncommunication device in the cell of the radio base station 2, so that the channel used by the radio base station 2 is not changed. Therefore, in that case, the addable resource acquisition unit 26 may acquire the addable resource amount of only the used channel.

  (Step S410) The communication unit 22 includes, for each uncommunication device, a required resource amount corresponding to each connectable radio base station 2, a priority of the uncommunication application, and an uncommunication device identifier of the uncommunication device, The amount of used resources and the amount of resources that can be added and the used channels acquired in steps S408 and S409 are transmitted to the management server 1. Then, the process returns to step S401.

  In the flowchart of FIG. 6, normal processing by the radio base station 2, that is, data received by the communication unit 22 is transmitted from the radio communication unit 21, and data received by the radio communication unit 21 is transmitted from the communication unit 22. Processing is omitted. Further, the order of processing in the flowchart of FIG. 6 is an example, and the order of each step may be changed as long as the same result can be obtained. For example, after transmitting a transmission request to each terminal device 3, the amount of resources used and the amount of resources that can be added may be acquired for each channel. In the flowchart of FIG. 6, the process is ended by powering off or interruption for aborting the process.

Next, operation | movement of the terminal device 3 is demonstrated using the flowchart of FIG.
(Step S501) The wireless communication unit 31 determines whether a transmission request has been received. If a transmission request is received, the process proceeds to step S502. Otherwise, the process proceeds to step S505.

  (Step S <b> 502) The control unit 32 determines whether an uncommunication application exists in the applications executed by the processing unit 34. If there is an uncommunication application, the process proceeds to step S503. If not, the process returns to step S501. Note that even when there is no uncommunication application, it may be transmitted that there is no uncommunication application.

  (Step S503) The transmission rate acquisition unit 33 performs a channel scan to identify the connectable radio base station 2, and acquires the transmission rate for each of the identified connectable radio base stations 2. As described above, the wireless base station 2 does not necessarily include the wireless base station 2 with which the terminal device 3 is currently performing wireless communication.

  (Step S504) The radio communication unit 31 transmits the transmission rate for each connectable radio base station 2 acquired in step S503 and the priority of the uncommunication application to the radio base station 2. The wireless communication unit 31 also includes information necessary for calculating the required resource amount using the transmission rate, for example, the offer load and the average packet size for each uncommunication application together with the transmission rate. May be sent to. Then, the process returns to step S501.

  (Step S505) The wireless communication unit 31 determines whether a connection destination change instruction has been received. If a connection destination change instruction is received, the process proceeds to step S506, and if not, the process proceeds to step S507.

  (Step S506) The control unit 32 changes the wireless base station 2 that is the connection destination of the wireless communication by the wireless communication unit 31 in accordance with the received connection destination change instruction. Then, the process returns to step S501.

  (Step S507) The wireless communication unit 31 determines whether a channel change instruction has been received. If a channel change instruction is received, the process proceeds to step S508, and if not, the process proceeds to step S509.

  (Step S508) In response to the received channel change instruction, the control unit 32 changes the channel used by the wireless communication unit 31 for wireless communication. In addition, since it is preferable that the process of changing the used channel is performed simultaneously with the process of changing the used channel in the radio base station 2, for example, the control unit 32 receives the channel change instruction from the radio communication unit 31. The processing may be performed after a predetermined time has elapsed or at a predetermined timing indicated by the channel change instruction. Then, the process returns to step S501.

  (Step S509) The wireless communication unit 31 determines whether channel information has been received. If the channel information is received, the process proceeds to step S510. If not, the process returns to step S501.

  (Step S510) The control unit 32 stores the received channel information in a recording medium (not shown). When a channel scan is performed thereafter, the scan is performed only for the channel indicated by the channel information. Then, the process returns to step S501.

  In the flowchart of FIG. 7, processing related to normal communication by the terminal device 3, that is, transmission of data by the wireless communication unit 31 or reception by the wireless communication unit 31 performed in response to execution of an application in the processing unit 34. The application processing in the processing unit 34 performed according to the data is omitted. Further, the order of processing in the flowchart of FIG. 7 is an example, and the order of each step may be changed as long as the same result can be obtained. In the flowchart of FIG. 7, the process ends when the power is turned off or the process is terminated.

  Next, the operation of the information communication system according to the present embodiment will be described using a specific example. In this specific example, it is assumed that the configuration of the information communication system is as shown in FIG. In this specific example, it is assumed that the terminal device 3-2 is a non-communication device, and the terminal devices 3-1, 3-3, 3-4 are not non-communication devices. First, suppose that the management server 1 determines that it is time to transmit a transmission request, and a transmission request is transmitted to each radio base station 2 (steps S101 and S102). The transmission request is received by the communication unit 22 of each radio base station 2, passed to the radio communication unit 21 via the control unit 23, and transmitted from the radio communication unit 21 to each terminal device 3 (steps S401 and S402). ). As described above, it is assumed that there is an uncommunication application in the terminal device 3-2 that has received the transmission request. Then, the control unit 32 instructs the transmission rate acquisition unit 33 to acquire the transmission rate in response to reception of the transmission request in the wireless communication unit 31 of the terminal device 3-2 (Steps S501 and S502). In response to the instruction, the transmission rate acquisition unit 33 acquires the RSSI of the beacon from the radio base station 2-2 and acquires the MCS index corresponding to the RSSI (step S503). The MCS index becomes the downlink transmission rate. In this specific example, it is assumed that the uplink transmission rate is the same as the downlink transmission rate. Therefore, the wireless communication unit 31 transmits the MCS index indicating the transmission rate, the type “voice communication” of the uncommunication application, the average packet size of the uncommunication application, and the offered load to the radio base station 2-1. (Step S504). Note that the type of the non-communication application is information corresponding to the priority of the non-communication application. Further, as described above, since the non-communication device is only the terminal device 3-2, transmission such as a transmission rate is not performed from the other terminal devices 3-1, 3-3, 3-4 (step S3). S501, S502).

  When receiving the MCS index or the like, the wireless communication unit 21 of the wireless base station 2-1 passes them to the control unit 32 (step S405). When receiving the MCS index or the like, the control unit 32 passes the MCS index, the average packet size of the uncommunication application, and the offered load to the required resource acquisition unit 24. The required resource acquisition unit 24 calculates the required resource amount using the information as described above (step S406). In this case, since only the radio base station 2-2 can be newly connected to the terminal device 3-2, an uncommunication application is established between the terminal device 3-2 and the radio base station 2-2. One required resource amount required when the corresponding wireless communication is performed is calculated. Thereafter, when a predetermined time has elapsed since the transmission of the transmission request from the radio base station 2-1 to the terminal devices 3-1 and 3-2, the control unit 23 determines to transmit the required resource amount and the like to the management server 1. (Step S407), the use resource acquisition unit 25 is instructed to acquire the use resource amount, and the addable resource acquisition unit 26 is instructed to acquire the addable resource amount. In response to the instruction, the used resource acquisition unit 25 acquires the current own cell used resource amount according to the carrier sense of the used channel. In addition, for the channels within ± 3 channels from the used channel, the used resource acquisition unit 25 sets the current own cell used resource amount equal to the current own cell used resource amount of the used channel. In addition, the use resource acquisition unit 25 sets the current own cell use resource amount to 0 for other channels, and sets the current own cell use resource amount for each of these channels to the control unit 23 and an addable resource acquisition unit. 26. (Step S408).

  When the addable resource acquisition unit 26 receives the current own cell use resource amount for each channel, the addable resource acquisition unit 26 acquires the current other cell use resource amount according to the carrier sense of each channel. Then, for each channel, the addable resource acquisition unit 26 calculates a relational expression using the current own cell usage resource amount and the current other cell usage resource amount, and uses the relational expression and the boundary line, The maximum radio resource amount (for example, x2 or x3 in FIG. 8) that can be accommodated in the own cell is specified, and the current own cell use resource amount (for example, x1 in FIG. 8) is determined from the maximum radio resource amount that can be accommodated. Alternatively, the addable resource amount is calculated by subtracting 0) (step S409). And the communication part 22 is the required resource amount at the time of the non-communication apparatus identifier which is the identifier of the terminal device 3-2, the kind of non-communication application, and the non-communication application communicating with the wireless base station 2-2. Then, the channel used by the radio base station 2-1 and the use resource amount and the addable resource amount of each channel in the radio base station 2-1 are transmitted to the management server 1 (step S410). Such information is received by the receiving unit 11 of the management server 1 and stored in the storage unit 12 in association with the base station identifier of the transmission source radio base station 2-1 (steps S103 and S104).

  Further, when a predetermined time has elapsed since the transmission request is transmitted from the radio base station 2-2 to the terminal devices 3-3 and 3-4, the control unit 23 of the radio base station 2-2 manages the required resource amount and the like. It is determined to transmit to the server 1 (step S407), and the use resource acquisition unit 25 is instructed to acquire the use resource amount, and the addable resource acquisition unit 26 is instructed to acquire the addable resource amount. Note that since there is no uncommunication device in the radio base station 2-2, the control unit 23 instructs to acquire the use resource amount and the addable resource amount only for the used channel. In response to the instruction, when the usage resource amount and the addable resource amount of the use channel are acquired (steps S408 and S409), the communication unit 22 uses the use resource amount and addition of the use channel in the radio base station 2-2. The possible resource amount and the used channel are transmitted to the management server 1 (step S410). Such information is received by the receiving unit 11 of the management server 1 and stored in the storage unit 12 in association with the base station identifier of the transmission source radio base station 2-2 (steps S103 and S104).

  Thereafter, when a predetermined time has elapsed since the transmission of the transmission request, the connection destination determination unit 13 determines that the reception process is to be terminated (step S105), and performs a process of determining the connection destination (step S106). Specifically, the non-communication device identifiers are sorted by the priority of the non-communication application (step S201). In this specific example, since there is only one uncommunication application, the result does not change even if this sorting is performed. On the other hand, when two or more uncommunication device identifiers are received, for example, the uncommunication device identifiers are sorted so that the type of the uncommunication application is in the order of voice communication → video communication → other communication. Also good. The order of uncommunication device identifiers having the same type of uncommunication application may be determined randomly, for example, or may be sorted using other information. Thereafter, the connection destination determination unit 13 determines whether there is a radio base station 2 that is a new connection destination (steps S202 and S203). That is, the connection destination determination unit 13 acquires a required resource amount and an addable resource amount corresponding to the radio base station 2-2 that is a radio base station to which the terminal device 3-2 can connect, and the addable resource amount. Determine whether or not is greater than the required resource amount. For example, if the addable resource amount is equal to or greater than the required resource amount, the connection destination determination unit 13 determines that there is a new connection destination of the terminal device 3-2 that is an uncommunication device, and the radio base station 2-2 Is determined as a new connection destination (step S204). Then, the connection destination change instruction transmission unit 14 transmits a connection destination change instruction including the base station identifier of the radio base station 2-2 to the terminal device 3-2 (step S205).

  The connection destination change instruction is transmitted to the terminal device 3-2 via the radio base station 2-1, and is received by the radio communication unit 31 (step S505). In response to receiving the connection destination change instruction, the control unit 32 controls the wireless communication unit 31 to connect to the radio base station 2-2 identified by the base station identifier included in the connection destination change instruction ( Step S506). As a result, as illustrated in FIG. 9, the terminal device 3-2 performs wireless communication with the wireless base station 2-2, and as a result, an uncommunication application can perform voice communication. The uncommunication state will be canceled.

  On the other hand, for example, if it is determined in the determination process in the connection destination determination unit 13 that the addable resource amount is not equal to or greater than the required resource amount, the terminal device 3-2 that is an uncommunication device connects to a new connection destination. Will not be able to. Therefore, in that case, the channel determination unit 15 determines that there is an uncommunication device for which a new connection destination has not been determined (step S107), and performs wireless communication with the terminal device 3-2 that is an uncommunication device. For the radio base station 2-1, processing for determining a new channel to be used is performed (step S108). Specifically, the channel determination unit 15 sorts the base station identifiers of the radio base stations 2 that are the target of channel determination by the number of uncommunication devices that are in radio communication with the radio base station 2 (step S301). ). For example, among the non-communication devices identified by the non-communication device identifier received from the radio base station 2, the channel determination unit 15 selects an uncommunication device for which a new connection destination has not been determined, It is good. In this specific example, there is only one radio base station 2 that is the target of channel determination. Therefore, even if this sorting is performed, the result does not change. Thereafter, the channel determination unit 15 uses the amount of available resources and the amount of resources that can be added for each channel associated with the base station identifier of the radio base station 2-1 to be determined, and the radio base station 2-1. Are used from the storage unit 12, and a value (A + B) obtained by adding the amount of used resources (A) and the amount of resources that can be added (B) is calculated for each channel. Then, it is determined whether or not there is a channel whose A + B value is larger than the A + B value relating to the currently used channel (steps S302 and S303). For example, assume that the value of A + B for each channel is as shown in FIG. 10, and the channel used is 5CH. Then, since the value of A + B of 9CH is larger than the value of A + B of 6CH, which is the currently used channel, the channel determination unit 15 determines a new used channel as 9CH (step S304). Then, according to the determination result, the channel change instruction transmitting unit 16 transmits a channel change instruction for changing the use channel to 9CH to the radio base station 2-1 that is a target for determining a new use channel ( Step S305).

  The channel change instruction transmitted from the management server 1 is transmitted to the terminal devices 3-1 and 3-2 via the radio base station 2-1. Then, in response to the channel change instruction, the radio base station 2-1 changes the use channel to 9CH, and the terminal devices 3-1 and 3-2 also change the use channel to 9CH (steps S403 and S404). , S507, S508). As a result, the non-communication state in the terminal device 3-2 can be resolved by the channel change. After that, the channel information transmission unit 17 of the management server 1 reads out 9CH, which is the channel used by the radio base station 2-1, and the channel used by the radio base station 2-2 from the storage unit 12, and transmits each radio base station Transmit to the station 2 (step S109). The channel information is received by each of the terminal devices 3-1 to 3-4 via the radio base station 2, and stored in a recording medium (not shown) (steps S509 and S510). After that, when channel scanning is performed in each terminal device 3, only the channel included in the channel information is scanned.

  As described above, according to the management server 1 according to the present embodiment, by determining a new connection destination of a non-communication device, an uncommunication application in the non-communication device is given an opportunity for wireless communication. And can provide sufficient QoE for as many applications as possible. In addition, by performing such a change of the connection destination in the descending order of the priority of the uncommunication application, it is possible to perform control in consideration of the priority of the application performing wireless communication. Further, even if the wireless network topology is changed as described in Patent Document 1, it is not guaranteed that the QoE will increase, but the amount of resources that can be added exceeds the required resource amount as in this embodiment. By setting a certain radio base station 2 as a new connection destination, it is possible to allow a non-communication application to start radio communication after connecting to a new radio base station 2 and to increase QoE. Become. In addition, even if the connection destination of an uncommunication device is changed, if there is still an uncommunication device, the amount of radio resources that can be used by the cell can be increased by changing the channel used in units of cells. it can. If each cell freely changes the channel used, the performance of the entire set of cells may be degraded. On the other hand, as in the present embodiment, the management server 1 controls the cell suitable for changing the use channel so that the use channel is changed to an appropriate channel. The efficiency of wireless communication can be improved.

  In the present embodiment, when a new connection destination radio base station 2 of a non-communication device is determined, the required resource amount of the non-communication application in the non-communication device is determined as the new connection destination. In the above description, the required resource amount corresponding to the radio base station 2 is subtracted from the addable resource amount of the radio base station 2, but this need not be the case. For example, when determining a new connection destination radio base station 2 of an uncommunication device and transmitting a connection destination change instruction corresponding thereto, and then receiving the additional resource amount from each radio base station 2 again Does not have to perform such subtraction.

  Moreover, although the case where the management server 1 transmits channel information has been described in this embodiment, this need not be the case. In that case, the management server 1 may not include the channel information transmission unit 17.

  Further, in the present embodiment, the case where the management server 1 determines a new use channel of the radio base station 2 has been described, but this need not be the case. If the new used channel is not determined, the management server 1 may not include the channel determination unit 15 or the channel change instruction transmission unit 16.

  In the present embodiment, a case has been described in which the management server 1 determines a new connection destination of an uncommunication device, but this need not be the case. When the new connection destination is not determined, the management server 1 may not include the connection destination determination unit 13 and the connection destination change instruction transmission unit 14. In that case, the management server 1 may cancel the non-communication state of the terminal device 3 by changing the channel used by the radio base station 2 that is performing radio communication with the non-communication device.

  In the above embodiment, each process or each function may be realized by centralized processing by a single device or a single system, or may be distributedly processed by a plurality of devices or a plurality of systems. It may be realized by doing.

  In the above embodiment, the information exchange between the components is performed by one component when, for example, the two components that exchange the information are physically different from each other. It may be performed by outputting information and receiving information by the other component, or when two components that exchange information are physically the same, one component May be performed by moving from the phase of the process corresponding to to the phase of the process corresponding to the other component.

  In the above embodiment, information related to processing executed by each component, for example, information received, acquired, selected, generated, transmitted, or received by each component In addition, information such as threshold values, mathematical formulas, addresses, and the like used by each constituent element in processing may be temporarily or for a long time held in a recording medium (not shown), even if not specified in the above description. Further, the storage of information on the recording medium (not shown) may be performed by each component or a storage unit (not shown). Further, reading of information from the recording medium (not shown) may be performed by each component or a reading unit (not shown).

  In the above embodiment, when information used by each component, for example, information such as a threshold value, an address, and various setting values used by each component may be changed by the user, Even if it is not specified in the description, the user may be able to change the information as appropriate, or may not be so. If the information can be changed by the user, the change is realized by, for example, a not-shown receiving unit that receives a change instruction from the user and a changing unit (not shown) that changes the information in accordance with the change instruction. May be. The change instruction received by the receiving unit (not shown) may be received from an input device, information received via a communication line, or information read from a predetermined recording medium, for example. .

  In the above embodiment, when two or more components included in the management server 1 have communication devices, input devices, or the like, the two or more components may have a physically single device. Or you may have separate devices.

  In the above-described embodiment, each component may be configured by dedicated hardware, or a component that can be realized by software may be realized by executing a program. For example, each component can be realized by a program execution unit such as a CPU reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory. At the time of execution, the program execution unit may execute the program while accessing the storage unit or the recording medium. In addition, the software which implement | achieves the management server 1 in the said embodiment is the following programs. That is, this program is an application that allows a computer to function as a management server that manages a plurality of wireless communication systems having a wireless base station and a terminal device that performs wireless communication with the wireless base station, and cannot perform wireless communication. Wireless communication of an uncommunication application for each wireless base station to which the uncommunication device can be connected, the priority of the uncommunication application, and the priority of the uncommunication application, which identifies the uncommunication device that is a terminal device in which a certain uncommunication application exists Receiving unit that receives required resource amount, which is a required radio resource, and additional resource amount that can be added by radio channel for each radio base station, identified by uncommunication device identifier received by receiving unit The new base station of the new connection destination of the non-communication device is changed to the non-communication application in the non-communication device. Connection destination determination unit that determines the order of priority, and a connection destination change instruction to change the connection destination according to the determination result by the connection destination determination unit to a non-communication device that has been determined to connect to a new connection destination The connection destination determination unit transmits a new connection destination of the non-communication device to a non-communication application in the non-communication device among wireless base stations to which the non-communication device can be connected. This is a program for determining a radio base station that has an additional resource amount that is greater than the required resource amount.

  Moreover, the software which implement | achieves the terminal device 3 in the said embodiment is the following programs. In other words, this program causes a computer to function as a terminal device that performs wireless communication with a wireless base station, and when there is an uncommitted application that is an application that cannot perform wireless communication, for each wireless base station that can be connected. A transmission rate acquisition unit that acquires a transmission rate, a required resource amount that is a radio resource required for radio communication of an uncommunication application for each radio base station that can be connected to the terminal device, calculated according to the transmission rate, The information for enabling the wireless base station that performs wireless communication with the device to transmit to the management server and the priority of the uncommunication application are transmitted to the wireless base station. Connection destination indicating that the connection destination is changed according to the determination result by the management server when the connection destination radio base station is determined When the wireless communication unit that receives the update instruction from the management server receives the connection destination change instruction, the control unit controls to change the connection destination wireless base station of the wireless communication unit according to the connection destination change instruction It is a program to make it function as.

  In the program, the functions realized by the program do not include functions that can be realized only by hardware. For example, functions that can be realized only by hardware such as a modem or an interface card in an acquisition unit that acquires information, an output unit that outputs information, and the like are not included in at least the functions realized by the program.

Further, this program may be executed by being downloaded from a server or the like, and a program recorded on a predetermined recording medium (for example, an optical disk such as a CD-ROM, a magnetic disk, a semiconductor memory, or the like) is read out. May be executed by Further, this program may be used as a program constituting a program product.
Further, the computer that executes this program may be singular or plural. That is, centralized processing may be performed, or distributed processing may be performed.

  FIG. 11 is a schematic diagram illustrating an example of an external appearance of a computer that executes the program and realizes the management server 1 and the terminal device 3 according to the embodiment. The above-described embodiment can be realized by computer hardware and a computer program executed on the computer hardware.

  In FIG. 11, a computer system 900 includes a computer 901 including a CD-ROM drive 905, a keyboard 902, a mouse 903, and a monitor 904.

  FIG. 12 is a diagram showing an internal configuration of the computer system 900. In FIG. 12, in addition to the CD-ROM drive 905, a computer 901 is connected to an MPU (Micro Processing Unit) 911, a ROM 912 for storing a program such as a boot-up program, and the MPU 911, and receives instructions of an application program. A RAM 913 that temporarily stores and provides a temporary storage space, a hard disk 914 that stores application programs, system programs, and data, and a bus 915 that interconnects the MPU 911, the ROM 912, and the like are provided. The computer 901 may include a network card (not shown) that provides connection to a LAN, WAN, or the like.

  A program that causes the computer system 900 to execute the functions of the management server 1 and the terminal device 3 according to the above-described embodiment may be stored in the CD-ROM 921, inserted into the CD-ROM drive 905, and transferred to the hard disk 914. . Instead, the program may be transmitted to the computer 901 via a network (not shown) and stored in the hard disk 914. The program is loaded into the RAM 913 when executed. The program may be loaded directly from the CD-ROM 921 or the network. Further, the program may be read into the computer system 900 via another recording medium (for example, a DVD) instead of the CD-ROM 921.

  The program does not necessarily include an operating system (OS) or a third-party program that causes the computer 901 to execute the functions of the management server 1 and the terminal device 3 according to the above-described embodiment. The program may include only a part of an instruction that calls an appropriate function or module in a controlled manner and obtains a desired result. How the computer system 900 operates is well known and will not be described in detail.

  Further, the present invention is not limited to the above-described embodiment, and various modifications are possible, and it goes without saying that these are also included in the scope of the present invention.

  As described above, according to the management server or the like according to the present invention, it is possible to provide a communication opportunity to an uncommunication application and to improve QoE. For example, as a server or the like for managing a plurality of wireless communication systems Useful.

DESCRIPTION OF SYMBOLS 1 Management server 2 Wireless base station 3 Terminal device 11 Receiving part 12 Storage part 13 Connection destination determination part 14 Connection destination change instruction transmission part 15 Channel determination part 16 Channel change instruction transmission part 17 Channel information transmission part 21, 31 Wireless communication part 22 Communication unit 24 Required resource acquisition unit 25 Use resource acquisition unit 26 Applicable resource acquisition unit 33 Transmission rate acquisition unit

Claims (11)

A management server that manages a plurality of wireless communication systems having a wireless base station and a terminal device that performs wireless communication with the wireless base station,
An uncommunication device identifier that identifies an uncommunication device that is a terminal device in which an uncommunication application that is an application that cannot perform wireless communication exists, a priority of the uncommunication application, and a wireless to which the uncommunication device can be connected A receiving unit that receives a required resource amount that is a radio resource necessary for radio communication of the uncommunication application for each base station, and an addable resource amount that is a radio resource that can be added by a use channel for each radio base station When,
A connection destination determination unit that determines a new connection destination radio base station of the uncommunication device identified by the uncommunication device identifier received by the reception unit in descending order of priority of the uncommunication application in the uncommunication device;
A connection destination change instruction transmission unit that transmits a connection destination change instruction to change the connection destination to an uncommunication device that has been determined to connect to a new connection destination according to a determination result by the connection destination determination unit; With
The connection destination determination unit includes a new connection destination of the non-communication device, and, among radio base stations to which the non-communication device can be connected, an additional resource amount that is equal to or greater than a required resource amount of the non-communication application in the non-communication device. A management server that determines a certain radio base station. The connection destination determination unit includes a new connection destination of the non-communication device, and, among radio base stations to which the non-communication device can be connected, an additional resource amount that is greater than a required resource amount of an uncommunication application in the non-communication device The management server according to claim 1, wherein the management server is determined to be a radio base station having a minimum required resource amount. The receiving unit also receives a use resource amount that is a radio resource used by each radio base station and a resource amount that can be added in each channel of the radio base station,
For a wireless base station that performs wireless communication with an uncommunication device for which a new connection destination has not been determined, the amount of resources that can be added is increased using the amount of resources used and the amount of resources that can be added for each channel related to the wireless base station. A channel determination unit for determining a new channel to be used;
A channel change instruction transmitting unit that transmits a channel change instruction for changing a used channel according to a determination result by the channel determining unit to a radio base station for which a new used channel has been determined. The management server according to claim 1 or claim 2. The management server according to claim 3, wherein the channel determination unit determines a new channel to be used for a radio base station that performs radio communication with a larger number of uncommunication devices for which a new connection destination has not been determined. The channel determination unit calculates, for each radio base station, a total value of values according to priorities of uncommunication applications in an uncommunication device that performs radio communication with the radio base station, and the radio with the maximum sum The management server according to claim 3, wherein a new use channel is determined for the base station. The receiving unit also receives a use channel for each radio base station,
The management server according to claim 1, further comprising a channel information transmission unit that transmits channel information indicating a channel used by each radio base station to the terminal device. A terminal device that performs wireless communication with a wireless base station,
A transmission rate acquisition unit that acquires a transmission rate for each connectable wireless base station when there is an uncommunication application that is an application that cannot perform wireless communication;
Wireless communication with the terminal device is performed for the required resource amount, which is a wireless resource required for wireless communication of the uncommunication application, for each wireless base station to which the terminal device can be connected, which is calculated according to the transmission rate. Information for enabling the radio base station to transmit to the management server and the priority of the uncommunication application are transmitted to the radio base station, and in response to the transmission, a new connection of the terminal device is transmitted in the management server. If the previous wireless base station is determined, a wireless communication unit that receives a connection destination change instruction to change the connection destination according to the determination result by the management server from the management server;
A control unit that controls to change a connection-destination wireless base station of the wireless communication unit in response to the connection-destination change instruction when the wireless communication unit receives the connection-destination change instruction. Terminal equipment. The wireless communication unit also receives channel information transmitted from the management server and indicating the channel used by each wireless base station,
The terminal device according to claim 7, wherein the control unit scans only a used channel indicated by the channel information at the time of channel scanning. A communication control method processed in a management server that manages a plurality of wireless communication systems having a wireless base station and a terminal device that performs wireless communication with the wireless base station,
An uncommunication device identifier that identifies an uncommunication device that is a terminal device in which an uncommunication application that is an application that cannot perform wireless communication exists, a priority of the uncommunication application, and a wireless to which the uncommunication device can be connected Receiving step of receiving a required resource amount that is a radio resource necessary for radio communication of the uncommunication application for each base station and an addable resource amount that is a radio resource that can be added by a use channel for each radio base station When,
A connection destination determination step for determining a new connection destination radio base station of the uncommunication device identified by the uncommunication device identifier received in the reception step in descending order of priority of the uncommunication application in the uncommunication device;
A connection destination change instruction transmission step for transmitting a connection destination change instruction for changing the connection destination according to the determination result in the connection destination determination step to an uncommunication device determined to connect to a new connection destination; With
In the connection destination determination step, a new connection destination of the uncommunication device is determined by adding an additional resource amount that is equal to or greater than a required resource amount of the uncommunication application in the uncommunication device among radio base stations to which the uncommunication device can be connected. A communication control method for determining a certain radio base station and subtracting the required resource amount from an addable resource amount of the radio base station. Computer
Function as a management server that manages a plurality of wireless communication systems having a wireless base station and a terminal device that performs wireless communication with the wireless base station;
An uncommunication device identifier that identifies an uncommunication device that is a terminal device in which an uncommunication application that is an application that cannot perform wireless communication exists, a priority of the uncommunication application, and a wireless to which the uncommunication device can be connected A receiving unit that receives a required resource amount that is a radio resource necessary for radio communication of the uncommunication application for each base station, and an addable resource amount that is a radio resource that can be added by a use channel for each radio base station ,
A connection destination determination unit that determines a new connection destination radio base station of the uncommunication device identified by the uncommunication device identifier received by the reception unit in descending order of priority of the uncommunication application in the uncommunication device;
Functions as a connection destination change instruction transmission unit for transmitting a connection destination change instruction to change a connection destination to an uncommunication apparatus determined to connect to a new connection destination according to a determination result by the connection destination determination unit Let
The connection destination determination unit includes a new connection destination of the non-communication device, and, among radio base stations to which the non-communication device can be connected, an additional resource amount that is equal to or greater than a required resource amount of the non-communication application in the non-communication device. A program that determines a certain radio base station. Computer
Function as a terminal device for wireless communication with a wireless base station,
A transmission rate acquisition unit that acquires a transmission rate for each connectable wireless base station when there is an uncommunication application that is an application that cannot perform wireless communication;
Wireless communication with the terminal device is performed for the required resource amount, which is a wireless resource required for wireless communication of the uncommunication application, for each wireless base station to which the terminal device can be connected, which is calculated according to the transmission rate. Information for enabling the radio base station to transmit to the management server and the priority of the uncommunication application are transmitted to the radio base station, and in response to the transmission, a new connection of the terminal device is transmitted in the management server. When a previous wireless base station is determined, a wireless communication unit that receives a connection destination change instruction to change the connection destination according to the determination result by the management server from the management server, the connection destination change instruction When receiving the connection destination, the program for causing the wireless communication unit to function as a control unit that controls to change the connection destination wireless base station according to the connection destination change instruction. Beam.

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