JP2008022087A - Wireless communication system, wireless base station, wireless communication terminal, communication control method, and communication control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively utilize a connection capability of the wireless base station by connecting a wireless communication terminal so that the traffic amount is not partial to a particular communication channel from a point of time when the wireless communication terminal belongs to the wireless base station. <P>SOLUTION: When receiving an assignment request, the wireless base station 2 counts the number of the wireless communication terminals assigned by each channel at the reception point of time. A control section 23 of the wireless base station 2 compares the number of assigned terminals in a communication channel making the assignment request, with the number of terminals assigned in each of the other communication channels on the basis of counted assignment number data by each channel. When a communication channel whose assignment number is smaller than the assignment number in the communication channel making the assignment request exists in all the channels compatible by the wireless base station 2 and the communication channel is not identical to the communication channel at the preceding assignment request as a result of the comparison, the wireless base station 2 rejects the assignment request. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a radio communication system, a radio base station, a radio communication terminal, a communication control method, and a communication control program capable of supporting a plurality of different communication schemes such as IEEE 802.11a / b / g.

  In general, a wireless communication terminal that supports wireless communication in accordance with a standard defined in IEEE 802.11a / b / g (hereinafter, 802.11a / b / g) supports 802.11a / b / g. When belonging to a wireless communication system that is not particularly set, the wireless communication terminal automatically selects one of 802.11a / b / g and attempts to belong to the wireless base station.

In addition, as a conventional wireless communication system, the number of packets moored or used since wireless data communication can be performed between a wireless base station and a terminal via a plurality of channels. Based on bandwidth, determine the overloaded channel, transmit one or more links from that channel to the less loaded channel, and try to balance the overall load (For example, refer to Patent Document 1).
JP 2005-278186 A

However, in the above-described conventional wireless communication system, which one of 802.11a / b / g is selected at the time of the attribution request from the wireless communication terminal depends on the basic setting of the wireless communication terminal and the like. The load balance at the radio base station is not considered.
For example, even when the number of 802.11g connections is smaller than the number of 802.11a connections in the wireless base station to which the attribution request is sent, when a plurality of wireless communication terminals automatically select 802.11a, It can be attributed to 802.11a regardless of the free space status, and as a result, the attribute can be concentrated only on 802.11a.

  Further, in the above-mentioned Patent Document 1, after a connection is established between a wireless base station and a terminal, a channel overloaded by wireless communication in that connection is searched, and the channel is switched depending on the case. From the time of belonging, it has not been considered to connect wireless communication terminals so as not to be biased toward a specific communication method.

That is, if the communication channel is switched after the connection is established, the following problem may occur.
(1) There is a possibility that a no-communication state may occur due to the switching process, and there is a possibility that the communication may be hindered.
(2) If authentication is performed by an authentication server, transmission / reception of encryption key information may be necessary with the switching process, which may increase traffic volume.
(3) Since it is necessary to regain the bandwidth necessary for communication at the switching destination, for example, if another terminal sends an attribution request at the same time as the switching processing, the attribution may not be reestablished in some cases. was there.

  The present invention has been made in view of such a situation. By connecting a wireless communication terminal so that the traffic amount is not biased to a specific communication method from the time when the wireless communication terminal belongs to the wireless base station, the wireless communication terminal is wirelessly connected. It is an object of the present invention to provide a radio communication system, a radio base station, a radio communication terminal, a communication control method, and a communication control program that can effectively use the connection capability of the base station.

  In order to achieve such an object, a wireless communication system according to a first aspect of the present invention is a wireless communication system including a wireless base station capable of wireless communication with a wireless communication terminal using a plurality of communication methods. When the wireless base station receives an attribution request from the wireless communication terminal, based on the communication state in the communication method of the attribution request and the communication state in another communication method that the wireless base station can handle, It is characterized in that it is provided with attribution permission / non-permission determining means for determining whether or not connection by the attribution request is possible.

  When the wireless base station receives an attribution request from the wireless communication terminal, the attribution permission / inhibition determining means provides the attribution number (an example of a numerical value indicating a communication state) in the communication method of the attribution request in the wireless base station. It is preferable to reject the attribution request when the number is larger than the number of attributions in the other communication methods.

  When the wireless base station receives an attribution request from the wireless communication terminal, the attribution permission / inhibition determining means provides the traffic amount (an example of a numerical value indicating a communication state) in the communication method of the attribution request in the wireless base station. It is preferable to reject the attribution request when the amount of traffic is larger than the other communication method.

  Request information storage means for associating and storing at least one latest communication method of the attribution request with the specific information for identifying the attribution request source terminal, wherein the attribution availability determination means includes an attribution request from the wireless communication terminal. However, it is preferable to permit the attribution request regardless of the communication state in the communication method when the communication method is the same as the latest one in the wireless communication terminal stored in the request information storage unit.

  Preferably, the wireless communication terminal includes a request communication method control unit that, when an attribution request is rejected, makes an attribution request again with a communication scheme different from the communication scheme for the rejected attribution request.

  The wireless communication terminal includes a requested communication method storage unit that stores communication method information in a transmitted attribution request, and the communication method information in the requested communication method storage unit is overwritten each time an attribution request is transmitted. The request communication method control means refers to the communication method information of the requested communication method storage means when a request for belonging to the radio base station is rejected, and a plurality of communication that the radio communication terminal can handle Of the methods, it is preferable to make the attribution request again with a communication method different from the communication method of the requested communication method storage means.

  The radio base station according to the second aspect of the present invention is a radio base station capable of radio communication with a radio communication terminal using a plurality of communication methods, and has received an attribution request from the radio communication terminal. And attributing availability determination means for determining whether or not to connect according to the attribution request based on the communication status in the communication scheme of the attribution request and the communication status in another communication scheme that can be supported by the radio base station. It is characterized by.

  When the wireless base station receives an attribution request from the wireless communication terminal, the attribution permission / inhibition determining means provides the attribution number (an example of a numerical value indicating a communication state) in the communication method of the attribution request in the wireless base station. It is preferable to reject the attribution request when the number is larger than the number of attributions in the other communication methods.

  When the wireless base station receives an attribution request from the wireless communication terminal, the attribution permission / inhibition determining means provides the traffic amount (an example of a numerical value indicating a communication state) in the communication method of the attribution request in the wireless base station. It is preferable to reject the attribution request when the amount of traffic is larger than the other communication method.

  Request information storage means for associating and storing at least one latest communication method of the attribution request with the specific information for identifying the attribution request source terminal, wherein the attribution availability determination means includes an attribution request from the wireless communication terminal. However, it is preferable to permit the attribution request regardless of the communication state in the communication method when the communication method is the same as the latest one in the wireless communication terminal stored in the request information storage unit.

  Moreover, the wireless communication terminal as the third aspect of the present invention is a wireless communication terminal capable of wireless communication by a plurality of communication methods, and when the attribution request to the wireless base station is rejected, the wireless communication terminal is rejected A request communication system control means for making an attribution request again with a communication system different from the communication system for the attribution request is provided.

It has a requested communication method storage means for storing communication method information in the transmitted attribution request,
The communication method information of the requested communication method storage means is overwritten each time an attribution request is transmitted, and the requested communication method control means is configured to request the requested communication method when the attribution request to the radio base station is rejected. With reference to the communication method information of the storage means, it is preferable to make the attribution request again with a communication method different from the communication method of the requested communication method storage means among the plurality of communication methods that can be supported by the wireless communication terminal. .

  A communication control method according to a fourth aspect of the present invention is a communication control method in a wireless communication system including a wireless base station capable of wireless communication with a wireless communication terminal using a plurality of communication methods. A reception step in which the wireless base station receives an attribution request from the wireless communication terminal, a communication state in the communication method of the attribution request received in the receiving step, and a communication in another communication scheme that the wireless base station can handle An attribution permission / inhibition determining step of determining whether or not to connect according to the attribution request based on the state.

  In the attribution determination process, the attribution number (an example of a numerical value indicating the communication state) in the communication method of the attribution request received in the reception step is larger than the attribution number in another communication scheme provided in the wireless base station. In this case, it is preferable to reject the attribution request.

  In the attribution permission / inhibition determination step, the traffic amount (an example of a numerical value indicating the communication state) in the communication method of the attribution request received in the reception step is larger than the traffic amount in another communication method provided in the wireless base station. In this case, it is preferable to reject the attribution request.

  After it is determined that the connection is not permitted in the attribution permission determination step, refer to the request information storage means for storing the attribution request communication method at least for the latest one time with the specific information for identifying the attribution request source terminal. If the attribution request received in the reception step is performed in the same communication method as the latest one in the wireless communication terminal stored in the request information storage unit, However, it is preferable to provide the same request permitting step for permitting the attribution request.

  When the wireless communication terminal is denied the attribution request, it is preferable to include a request communication scheme control step for performing the attribution request again with a communication scheme different from the communication scheme for the rejected attribution request.

  In the requested communication scheme control step, when the attribution request to the radio base station is rejected, refer to the communications scheme information of the requested communications scheme storage means for storing the communications scheme information in the latest attribution attribution request, Of the plurality of communication methods that can be supported by the wireless communication terminal, it is preferable to make the attribution request again with a communication method different from the communication method of the requested communication method storage means.

  A communication control program as a fifth aspect of the present invention is a communication control program in a wireless communication system including a wireless base station capable of wireless communication with a wireless communication terminal using a plurality of communication methods. In the reception process of receiving the attribution request from the radio communication terminal to the radio base station, the communication status in the communication scheme of the attribution request received in the reception process, and in other communication schemes that the radio base station can handle An attribution permission / inhibition determination process for determining permission / inhibition of connection according to the attribution request is performed based on a communication state.

  In the attribution determination process, the attribution number in the communication method of the attribution request received in the reception process (an example of a numerical value indicating the communication state) is larger than the attribution number in other communication schemes provided in the wireless base station. In this case, it is preferable to reject the attribution request.

  In the attribution determination process, the traffic amount (an example of a numerical value indicating the communication state) in the communication method of the attribution request received in the reception process is larger than the traffic amount in other communication schemes provided in the wireless base station. In this case, it is preferable to reject the attribution request.

  After the wireless base station determines that the connection is not permitted in the attribution permission / inhibition determination process, the communication method of the attribution request is associated with at least the latest one time and stored in the specific information that identifies the originating terminal of the attribution request. Referring to the request information storage means, if the attribution request received in the reception process is performed in the same communication method as the latest one in the wireless communication terminal stored in the request information storage means, the communication It is preferable to execute the same request permission process for permitting the attribution request regardless of the communication state in the system.

  When the wireless communication terminal is refused an attribution request, the wireless communication terminal may execute a requested communication scheme control process for making an attribution request again in a communication scheme different from the communication scheme in the rejected attribution request. preferable.

  In the request communication method control process, when the attribution request to the wireless base station is rejected, refer to the communication method information of the requested communication method storage means for storing the communication method information in the latest transmitted attribution request, Of the plurality of communication methods that can be supported by the wireless communication terminal, it is preferable to make the attribution request again with a communication method different from the communication method of the requested communication method storage means.

  As described above, according to the present invention, the connection capability of the radio base station is achieved by connecting the radio communication terminal so that the traffic amount is not biased to a specific communication scheme from the time when the radio communication terminal belongs to the radio base station. Can be used effectively.

Next, the radio communication system, radio base station, radio communication terminal, communication control method, and communication control program according to the present invention are applied to a radio communication system provided with a radio base station compatible with 802.11a / b / g. The above-described embodiment will be described in detail with reference to the drawings.
First, an outline of the present embodiment will be described.

  In the present embodiment, in a situation where there are a plurality of wireless communication terminals belonging to a wireless base station compatible with 802.11a / b / g, control is performed so that the belonging numbers of 802.11a / b / g are evenly approximated. Thus, the bandwidth can be used effectively.

In this embodiment, in order to alleviate the concentration of attribution, which is a problem of the conventional technology, each wireless base station manages the number of connections for each 802.11a / b / g, and when the attribution request is made, Encourage them to belong with fewer communication methods.
If a request for attribution is made to a crowded connection, the attribution is rejected based on the communication state, and the user is prompted to try attribution with another communication method so that the band can be used effectively.

Next, the configuration of the wireless communication system as the present embodiment will be described.
As shown in FIG. 1, a wireless communication system 1 according to the present embodiment includes a wireless base station 2 and wireless communication terminals 3 (3a, 3b, 3c) that correspond to the respective frequency bands of 802.11a / b / g. ,...

  As shown in FIG. 2, the wireless base station 2 is wired to a wireless communication unit 21 that performs wireless communication with other devices such as the wireless communication terminal 3, and other devices that form a network such as a system control device (not illustrated). A wired communication unit 22 that performs communication, a control unit 23 that controls the entire operation of the wireless base station 2, and a storage unit 24 that stores an attribution request communication method table 24a and the like.

  As shown in FIG. 3, the attribution request communication method table (request information storage means) 24a stores the MAC address (specific information for identifying the radio communication terminal) of the radio communication terminal at the time of the previous attribution request by the radio communication terminal. A communication method is associated with each other.

  As shown in FIG. 4, the wireless communication terminal 3 includes a wireless communication unit 31 that performs wireless communication with the wireless base station 2, and a communication control unit 32 that controls a communication method used for connection in wireless communication (request communication method). Control means), a control unit 33 for controlling the entire operation of the voice call terminal 3, and a storage unit 34 for storing the previous attribution request communication method 34a and the like.

  The previous attribution request communication method 34a (requested communication method storage means) stores the communication method used for the attribution request when the wireless communication terminal 3 made the attribution request last time. Will be overwritten sequentially.

  Next, the operation of the wireless communication system 1 as the present embodiment will be described with reference to the flowchart of FIG. In FIG. 5, the processing on the wireless base station 2 side and the processing on the wireless communication terminal 3 side are shown separately.

The flowchart of FIG. 5 starts when the wireless communication terminal 3 attempts to belong to the wireless base station 2.
First, the wireless communication terminal 3 selects one communication method to be used for the current attribution request from 802.11a / b / g, which is a communication method that the wireless communication terminal 3 can handle, based on a predetermined setting or the like (step S1). S1), an attribution request is transmitted to the radio base station 2 by the communication method (step S2).

  When receiving the attribution request, the radio base station 2 counts the number of radio communication terminals belonging to each communication method at the time of reception (step S3). Based on the counted attribution number data for each communication method, the control unit 23 of the radio base station 2 determines the attribution number in the communication method of the attribution request in step S2 and the attribution number in each of the other communication methods. Are compared (step S4).

  In this comparison, when the number of attributions in the communication method of the attribution request in step S2 is the same as the smallest or smallest among all communication methods that can be supported by the radio base station 2 (step S4; The same or less), the attribution request in step S2 is permitted, and attribution processing is performed (step S10).

If this is not the case, that is, if there is a communication method with a smaller number of attributions than the number of attributions in the communication method of the attribution request in step S2 among all communication methods that can be supported by this radio base station 2 (step S4; As a next process, the control unit 23 refers to the attribution request communication method table 24a, and confirms the communication method at the time of the previous attribution request from the Mac Address of the wireless communication terminal 3 that has made the attribution request.
Thus, it is checked whether or not the communication method of the attribution request at step S2 is the same as the communication scheme at the time of the previous attribution request by the same wireless communication terminal 3 (step S5).

The check process in step S5 is a remedy when the wireless communication terminal that has transmitted the attribution request does not support a plurality of communication methods such as 802.11a / b / g.
In other words, if the wireless communication terminal does not support multiple communication methods, even if the attribution is rejected, the attribution request will be sent again using the same communication method as the previous time, so attribution rejection is always performed. This is to avoid the situation.

  For this reason, when it is determined by the check in step S5 described above that the communication method in the current attribution request is the same as the communication method in the previous attribution request by the same wireless communication terminal 3 (step S5; Yes), The radio base station 2 does not reject the attribution request and continues the attribution process as it is (step S10).

  When it is determined by the check in step S5 described above that the communication method in the current attribution request is not the same as the communication method in the previous attribution request by the same wireless communication terminal 3 (step S5; No), the wireless base station The station 2 rejects the current attribution request at step S2 (step S6).

When the attribution request is rejected in this way, the communication control unit 32 of the wireless communication terminal 3 can use another communication method different from the communication method used in the previous attribution request (step S7; Yes). With reference to the attribution request communication method 34a, the attribution request is transmitted again to the radio base station 2 by another communication method different from the communication method in the previous attribution request (steps S8 and S2).
When there are a plurality of communication methods as different communication methods, the wireless communication terminal 3 selects one communication method to be used for re-assignment request based on a predetermined setting from among the communication methods, A re-association request is transmitted to the radio base station 2 by the communication method.

  When the communication method different from the communication method used in the previous attribution request is not supported (step S7; No), the communication control unit 32 of the wireless communication terminal 3 again transmits the attribution request again by the same communication method. Transmit to the base station 2 (steps S9, S2).

  As described above, according to the present embodiment, when the wireless base station 2 receives the attribution request, if the attribution number in the communication method of the connection request is larger than the attribution number in the other communication method, the received attribution request is By refusing, it is possible to prompt the wireless communication terminal 3 to try to belong to another communication method.

Thereby, it is possible to prevent the number of belongings from being biased to a specific communication method from the time when the wireless communication terminal 3 belongs to the wireless base station 2.
For this reason, it is not necessary to generate a connection switching process after belonging, so that the uneven number of belongings between the respective communication methods can be reduced, and the connection capability of the radio base station 2 can be effectively utilized.

Here, in the conventional wireless communication system described above, there is a possibility that the number of belongings is biased to one communication method. In other words, for example, when it is biased to either 802.11a or 802.11g, there is a possibility that 54 Mbps may remain unused.
If the configuration according to the present embodiment is implemented, the unused portion can be used effectively, so that an effect of up to 200% can be obtained.

Each of the above-described embodiments is a preferred embodiment of the present invention, and the present invention is not limited to this, and various modifications can be made based on the technical idea of the present invention.
For example, although one radio base station is illustrated in FIG. 1 and described, the present invention can be similarly applied to a radio communication system including a plurality of radio base stations according to this embodiment.
Further, it is clear that the number of connected wireless communication terminals 3 is not limited to the above-described number.

Further, in the above-described embodiment, when it is determined that the communication method in the current attribution request is the same as the communication method in the previous attribution request by the same wireless communication terminal 3 as the operation in step S5 in FIG. Although it has been described that the processing is continued, it may be configured to use whether or not there is a free communication channel as a determination material.
That is, a configuration may be adopted in which, when there is no room for simultaneous connection capacity in all communication channels in the communication method in the current attribution request, attribution rejection is possible.

  Further, in the above-described embodiment, it has been described that whether the attribution is possible or not is determined based on whether the attribution number in the communication method of the attribution request is larger than the attribution number in the other communication scheme provided in the wireless base station. However, it is not limited to this configuration as long as the traffic amount between each communication method can be unbiased at the time of belonging, for example, the number of packets moored in each communication method, the bandwidth in use, etc. Even if the traffic volume is determined by other factors, and the traffic volume of the communication method for which the attribution request has been made is larger than the traffic volume of the other communication system, the present invention is similarly realized even in a configuration in which the attribution is rejected. Can do.

Further, the wireless communication terminal according to the present invention can be applied to any information device having a wireless communication function. For example, a voice call such as a mobile phone that performs a voice call by VoIP (Voice over IP). The present invention can be similarly applied to an information communication terminal such as a terminal, a PDA (Personal Digital Assistant), and a notebook PC (Personal Computer).
Further, since the connection capability of the wireless base station 2 can be effectively used, the above-described embodiment can be suitably applied to the case where so-called multimedia such as voice and moving images is used in wireless communication.

Further, by recording the processing procedure for realizing the wireless communication system 1 as the above-described embodiment on a recording medium as a program, the above-described functions according to each embodiment of the present invention are supplied from the recording medium. The program can be realized by causing a CPU of a computer constituting the system to perform processing.
In this case, the present invention can be applied even when an information group including a program is supplied to the output device from the above recording medium or from an external recording medium via a network.
That is, the program code itself read from the recording medium realizes the novel function of the present invention, and the recording medium storing the program code and the signal read from the recording medium constitute the present invention. It will be.
As this recording medium, for example, a floppy (registered trademark) disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD-R, magnetic tape, nonvolatile memory card, ROM, EEPROM, or the like may be used.

  According to the program according to the present invention, each function in the wireless communication system 1 as the embodiment according to the present invention described above can be realized in the wireless communication system controlled by the program.

1 is a block diagram illustrating a configuration example of a wireless communication system 1 as an embodiment of the present invention. FIG. 2 is a block diagram showing a configuration example of a radio base station 2 in the radio communication system 1. It is a figure which shows the structural example of the attribution request | requirement communication system table 24a. 3 is a block diagram illustrating a configuration example of a wireless communication terminal 3. FIG. 3 is a flowchart showing an operation example of the wireless communication system 1;

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wireless communication system 2 Wireless base station 23 Control part 24 Storage part 24a Attribution request | requirement communication system table (an example of a request information storage means)
3 wireless communication terminal 31 wireless communication unit 32 communication control unit (an example of request communication method control means)
33 Control unit 34 Storage unit 34a Previous attribution request communication method (an example of requested communication method storage means)

Claims (24)

A wireless communication system including a wireless base station capable of wireless communication by a plurality of communication methods with a wireless communication terminal,
When the wireless base station receives an attribution request from the wireless communication terminal, the attribution request is based on a communication state in the communication method of the attribution request and a communication state in another communication method that can be supported by the wireless base station. A wireless communication system comprising an attribution availability determination unit that determines whether or not connection is possible.   When the wireless base station receives an attribution request from the wireless communication terminal, the attribution determination unit determines that the attribution number in the communication scheme of the attribution request is an attribution in another communication scheme provided in the wireless base station. The wireless communication system according to claim 1, wherein if there are more than the number, the attribution request is rejected.   When the wireless base station receives an attribution request from the wireless communication terminal, the attribution permission / inhibition determining means determines that the traffic amount in the communication method of the attribution request is traffic in another communication scheme provided in the wireless base station. The wireless communication system according to claim 1, wherein, when the amount is larger than the amount, the attribution request is rejected. A request information storage means for storing in association with at least the latest one communication method of the attribution request to the specific information for identifying the source terminal of the attribution request;
When the attribution request from the wireless communication terminal is made in the same communication method as the latest one in the wireless communication terminal stored in the request information storage unit, the attribution permission / inhibition determining unit The wireless communication system according to any one of claims 1 to 3, wherein the request for attribution is permitted regardless.   The wireless communication terminal comprises request communication method control means for making an attribution request again in a communication method different from the communication method in the rejected attribution request when the attribution request is rejected. The wireless communication system according to any one of 1 to 4. The wireless communication terminal comprises a requested communication method storage means for storing communication method information in a transmitted attribution request,
The communication method information of the requested communication method storage means is overwritten each time an attribution request is transmitted,
The requested communication method control means refers to communication method information of the requested communication method storage means when a request for belonging to the wireless base station is rejected, and a plurality of communication methods that the wireless communication terminal can handle 6. The wireless communication system according to claim 5, wherein the belonging request is made again by a communication method different from the communication method of the requested communication method storage means. A wireless base station capable of wireless communication with a wireless communication terminal using a plurality of communication methods,
When an attribution request is received from the wireless communication terminal, whether or not connection by the attribution request is possible based on the communication status in the communication scheme of the attribution request and the communication status in another communication scheme that can be supported by the radio base station. A radio base station, comprising: a belonging determination unit for determining whether to belong.   When the wireless base station receives an attribution request from the wireless communication terminal, the attribution permission / inhibition determining means determines that the attribution number in the communication method of the attribution request is an attribution in another communication scheme provided in the wireless base station. The radio base station according to claim 7, wherein, when the number is greater than the number, the attribution request is rejected.   When the wireless base station receives an attribution request from the wireless communication terminal, the attribution permission / inhibition determining means determines that the traffic amount in the communication method of the attribution request is traffic in another communication scheme provided in the wireless base station. The radio base station according to claim 7, wherein, when the amount is larger than the amount, the attribution request is rejected. A request information storage means for storing in association with at least the latest one communication method of the attribution request to the specific information for identifying the source terminal of the attribution request;
When the attribution request from the wireless communication terminal is made in the same communication method as the latest one in the wireless communication terminal stored in the request information storage unit, the attribution permission / inhibition determining unit The radio base station according to any one of claims 7 to 9, wherein the access request is permitted regardless of whether or not it belongs. A wireless communication terminal capable of wireless communication using a plurality of communication methods,
A wireless communication terminal, comprising: a request communication method control unit that, when a request for belonging to a wireless base station is rejected, makes a request for belonging again with a communication method different from the communication method used in the rejected belonging request . It has a requested communication method storage means for storing communication method information in the transmitted attribution request,
The communication method information of the requested communication method storage means is overwritten each time an attribution request is transmitted,
The requested communication method control means refers to the communication method information of the requested communication method storage means when the attribution request to the wireless base station is rejected, and a plurality of communication methods that the wireless communication terminal can support. 12. The wireless communication terminal according to claim 11, wherein the request for belonging is made again with a communication method different from the communication method of the requested communication method storage means. A communication control method in a wireless communication system including a wireless base station capable of wireless communication with a wireless communication terminal using a plurality of communication methods,
A receiving step in which the radio base station receives an attribution request from the radio communication terminal;
An attribution permission determination step of determining whether or not connection by the attribution request is possible based on a communication state in the communication method of the attribution request received in the reception step and a communication state in another communication scheme that can be supported by the wireless base station; A communication control method comprising:   In the attribution permission / inhibition determining step, if the attribution number in the communication method of the attribution request received in the receiving step is larger than the attribution number in another communication method provided in the wireless base station, the attribution request is rejected. The communication control method according to claim 13.   In the attribution permission / inhibition determination step, if the traffic amount in the communication method of the attribution request received in the reception step is larger than the traffic amount in another communication scheme provided in the radio base station, the attribution request is rejected. The communication control method according to claim 13.   After it is determined that the connection is not permitted in the attribution permission determination step, refer to request information storage means for associating and storing at least one latest communication method of the attribution request with the specific information that identifies the originating terminal of the attribution request. If the belonging request received in the receiving step is performed in the same communication method as the latest one in the wireless communication terminal stored in the request information storage unit, The communication control method according to any one of claims 13 to 15, further comprising an identical request permission step of permitting the attribution request.   14. A request communication method control step of performing a request for belonging again with a communication method different from the communication method for the rejected belonging request when the wireless communication terminal is rejected with the belonging request. The communication control method according to any one of 1 to 16.   In the requested communication scheme control step, when the attribution request to the radio base station is rejected, refer to the communications scheme information of the requested communications scheme storage means for storing the communications scheme information in the latest transmitted attribution request, 18. The communication control method according to claim 17, wherein, among the plurality of communication methods that can be supported by the wireless communication terminal, the attribution request is made again with a communication method different from the communication method of the requested communication method storage means. A communication control program in a wireless communication system including a wireless base station capable of wireless communication by a plurality of communication methods with a wireless communication terminal,
In the radio base station,
A receiving process for receiving an attribution request from the wireless communication terminal;
An attribution availability determination process for determining whether or not a connection can be made according to the attribution request based on a communication status in the communication scheme of the attribution request received in the reception processing and a communication status in another communication scheme that can be supported by the radio base station; And a communication control program.   The attribution permission determination process rejects the attribution request when the attribution number in the communication method of the attribution request received in the reception process is larger than the attribution number in another communication method provided in the radio base station. The communication control program according to claim 19.   In the attribution permission / inhibition determination process, if the traffic amount in the communication method of the attribution request received in the reception process is larger than the traffic amount in another communication scheme provided in the wireless base station, the attribution request is rejected. The communication control program according to claim 19. In the radio base station,
After it is determined that the connection is not permitted in the attribution permission determination process, refer to request information storage means that associates and stores at least the latest communication method of the attribution request with the specific information that identifies the originating terminal of the attribution request. If the attribution request received in the reception process is performed in the same communication method as the latest one in the wireless communication terminal stored in the request information storage unit, The communication control program according to any one of claims 19 to 21, wherein the same request permission process for permitting the attribution request is executed. In the wireless communication terminal,
20. When the wireless communication terminal is denied an attribution request, a requested communication scheme control process is performed for performing an attribution request again in a communication scheme different from the communications scheme in the rejected attribution request. The communication control program according to any one of 1 to 22.   In the request communication method control process, when the attribution request to the radio base station is rejected, refer to the communication method information of the requested communication method storage means for storing the communication method information in the latest transmitted attribution request, 24. The communication control program according to claim 23, wherein the attribution request is made again with a communication method different from the communication method of the requested communication method storage means among the plurality of communication methods that can be supported by the wireless communication terminal.

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