JP2001268274A - Wireless communication system and wireless communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wireless communication system that can flexibly set a communication charge, in response to a wireless communication facility in use and allows a user to flexibly select a wireless base station, depending on a communication charge. SOLUTION: The wireless base stations A and B store information with respect to a communication charge (charging information) and each wireless base station periodically transmits this information. A wireless terminal C, placed in communication areas RA and RB of the wireless base stations A and B receives the information with respect to the communication charge from each wireless base station, selects either of the wireless base stations providing an inexpensive communication charge, on the basis of contents of the information and sends a connection request to the selected wireless base station. The wireless base station receiving the connection request performs data transmission reception processing to the wireless terminal C being the request source.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a procedure for connecting to a radio base station in which a radio base station reports a communication fee and a radio terminal selects a radio base station with which to communicate based on the communication fee information.

[0002]

2. Description of the Related Art Conventionally, in the field of wireless communication systems such as portable telephones, a plurality of carriers have their own wireless base stations, and communication fees are determined for each carrier. Therefore, the wireless terminal to be purchased by the user and the communication fee are determined depending on which communication carrier the wireless communication system is used by, and the user cannot flexibly select the wireless base station. .

[0003] A service is conceivable in which a wireless terminal side selects a wireless base station having a low communication fee from a plurality of communication carriers to perform connection. In this type of service, charge information for each communication carrier is registered (stored) in advance on the wireless terminal side, and at the time of connection, the communication rate is calculated and compared on the wireless terminal side based on the charge information. It is possible to select a communication carrier whose communication fee is low.

[0004]

By the way, in the above-mentioned radio communication system according to the prior art, regardless of the type of network used and the type of radio communication equipment of the radio base station, such as the type of network, the communication time and communication section are not limited. The communication fee is uniquely calculated in accordance with, for example, and billing is performed. Therefore, there has been a problem that a communication carrier cannot flexibly set a communication fee according to a radio base station.

[0005] In the above service, when a communication carrier changes the communication charge, it is necessary to update the charge information registered in the wireless terminal.
This has been done in response to the user of the wireless terminal. Therefore, it is difficult to reflect the communication fee changed by the communication carrier on the fee information registered in the wireless terminal in real time, so that the user may not be able to benefit from the service. There is. In addition, communication carriers to be connected by this service are limited to those whose fee information is registered in advance in the wireless terminal.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and allows a communication fee to be flexibly set according to a radio base station to be used. An object of the present invention is to provide a wireless communication system capable of flexibly selecting.

[0007]

In order to solve the above problems, the present invention has the following arrangement. That is, the wireless communication system according to the present invention provides information on communication charges (for example, “charging information” transmitted by wireless base stations A and B described later).
And a wireless base station (for example, a component corresponding to wireless base stations A and B, which will be described later) that transmits a connection request from the wireless terminal and executes predetermined processing. A wireless terminal that receives the information from the base station and issues the connection request (for example, an element corresponding to a “connection request” issued by a wireless terminal C to be described later) to the wireless base station according to the content of the information (for example, (A component corresponding to the wireless terminal C).

In the wireless communication system, the wireless terminal receives the information on the communication charge from a plurality of wireless base stations, selects the wireless base station presenting the cheapest communication charge, and issues the connection request. (For example, elements corresponding to the processing of steps S21A to S25A described later).

In the wireless communication system, the wireless terminal receives the information on the communication charge, compares a desired charge registered in advance with a communication charge presented by the wireless base station, and determines a result of the comparison. Issue the connection request in accordance with (for example, steps S21B to S25 described later).
B).

Further, in the wireless communication system,
The wireless terminal receives the information on the communication fee,
The information is notified to a user, and the connection request is issued in response to an instruction from the user. Furthermore, in the wireless communication system, the wireless base station includes a storage unit that stores information on the communication charge in advance.

A wireless communication method according to the present invention is a wireless communication method in a wireless communication system including a wireless base station and a wireless terminal, wherein (a) the wireless base station relates to a wireless terminal with a communication fee. The first to send information regularly
(Elements corresponding to the processing of step S10 to be described later), and (b) the wireless terminal receives the information from the wireless base station, and issues a connection request to the wireless base station according to the content of the information. (C) a third step in which the radio base station receives the connection request and executes the predetermined processing (step S20). (Equivalent to the process of S30).

[0012] In the second step, the wireless terminal receives the information from a plurality of wireless base stations, respectively, selects the wireless base station that presents the cheapest communication fee, and issues the connection request ( For example, it is characterized by elements (corresponding to the processing of steps S21A to S25A described later).

In the second step, the wireless terminal receives the information, compares a desired charge set in advance with a communication charge presented by the wireless base station, and responds to the result of the comparison. Issue the connection request (for example, an element corresponding to the processing of steps S21B to S25B described later). Further, in the second step, the wireless terminal receives the information, notifies the user of the information, and issues the connection request in response to an instruction from the user.

The operation of the present invention will be described below. The wireless base station transmits information on the communication fee at any time. This information is transmitted to the wireless terminal using, for example, a channel that is first received when the wireless terminal connects to the wireless base station.
This allows the wireless terminal to receive the information before the wireless terminal connects to the wireless base station.

[0015] The wireless terminal receives information on the communication fee from the wireless base station, and issues a connection request to the wireless base station according to the content of the information. Upon receiving this request, the wireless base station executes a predetermined process such as transmission and reception of data. Here, the wireless terminal compares, for example, the communication charges presented by each wireless base station, and selects a wireless base station that presents a low communication charge.

Further, the wireless terminal automatically selects a wireless base station that presents a communication charge lower than a desired charge set in advance and automatically issues a connection request. Further, the wireless terminal displays, for example, the received information to the user, and issues a connection request to the wireless base station when the user desires communication connection.

The present invention described above can be rephrased as follows. That is, in the wireless communication system according to the present invention, information relating to communication charges (for example, billing described later) is provided at a wireless base station (for example, a component corresponding to wireless terminal stations A and B described later) having a function of broadcasting service information. Information) as the service information, and the wireless terminal side (for example, a component corresponding to a wireless terminal C described later) receives the service information and selects a wireless base station that provides an inexpensive service before starting communication. It is characterized by having been constituted so that.

Further, in the paraphrased radio terminal of the radio communication system, for example, by comparing a communication fee notified from a radio base station with a communication fee registered in advance on the radio terminal side, an inexpensive service is provided. (For example, step S20, which will be described later,
(Elements corresponding to the processes of S21A to S26A and S21B to S26B). Further, in the paraphrased radio base station of the radio communication system, for example, information on communication charges is set and notified as service information so that a radio base station providing an inexpensive service can be selected on the radio terminal side. It is characterized by.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a radio communication system according to an embodiment of the present invention will be described with reference to the drawings. The features of the present invention are summarized in the following two points. (1) Information on communication charges is individually set in each wireless base station. (2) On the wireless terminal side, information on communication charges is acquired from each wireless base station, and a wireless base station to be used for wireless communication is selected based on this information. Focusing on these two points, Embodiments 1 and 2 of the present invention will be described in order.

<First Embodiment> FIG. 1 shows an overall configuration of a wireless communication system according to a first embodiment of the present invention. This wireless communication system is a mobile communication system including a wireless base station having a function of broadcasting (transmitting) various kinds of service information and a wireless terminal. The wireless terminal is configured to receive the information and select a wireless base station that provides an inexpensive service before starting communication.

That is, in FIG. 1, symbols A and B are radio base stations. Reference numeral RA represents a communication area (communicable range) of the radio base station A, and reference numeral RB represents a communication area of the radio base station B. Reference symbol C is a wireless terminal such as a mobile phone. In the example shown in FIG. 1, the radio terminal C is a radio base station A
Is located in an overlapping area of the communication area RA of the wireless base station B and the communication area RB of the wireless base station B, and is in a communicable state with any of the wireless base stations.

Each of the radio base stations A and B transmits, to the radio terminal side, information relating to a communication charge specified for each radio base station (hereinafter referred to as "charging information") in addition to the functions of a normal radio base station. In addition, it has a function of executing a data transmission / reception process (predetermined process) in response to a connection request from the wireless terminal that has received the charging information. That is, the radio base stations A and B
Is configured to set and notify the billing information as service information, and to enable the wireless terminal to select a wireless base station that provides an inexpensive service. The charging information is stored in advance in a storage unit (not shown) provided in each wireless base station. The wireless terminal C has a function of receiving charging information from the wireless base station and issuing a connection request to the wireless base station in accordance with the content of the information, in addition to the communication function of a normal wireless terminal.

The billing information stored in the storage units of the radio base stations A and B is information used for calculating a communication fee to be charged to a user, and includes information such as radio communication equipment of each radio base station. According to the content, it is individually defined for each wireless base station. The content of the billing information is determined based on, for example, the following items related to cost. (1) Telecommunications carrier (2) Type of connection NW (NW: network) (3) Bandwidth allocated in wireless section (4) Format of used bandwidth (fixed bandwidth / best effort) (5) Guaranteed minimum bandwidth

In the first embodiment, as illustrated in FIG. 2, the communication carrier of the radio base station A is “JA”, the type of the connection NW is “NA”, and the allocation of the radio section is performed. It is assumed that the band is “BA”, the communication carrier of the wireless base station B is “JB”, the type of the connection NW is “NB”, and the allocated band of the wireless section is “BB”. There is. Depending on the contents of these items, the content of each charging information of the radio base station A and the radio base station B is different, and a difference is caused in the communication fee when each radio base station is used.

Here, as shown in FIG. 3, there is another communication carrier JC connected to the radio base station (AP) via the network (NW), and this communication carrier JC is connected to the radio base station (AP). ) Is used semi-publicly to provide another wireless communication service, the communication fee paid by the user of the wireless terminal (MT) to the communication carrier JC is reduced to a normal public communication fee (for example, 1000 yen). Communication charges higher than (eg 1000+
A billing mechanism that can be set to (α yen) is conceivable. According to the present invention, in such a case, the side providing the wireless base station (AP) can flexibly determine the increase (α yen).

FIG. 4 shows an example of a message format of charging information transmitted by each radio base station. FIG. 4 (a)
FIG. 4B shows an example in which a charge level is transmitted as charging information. FIG. 4B shows “charging method”,
An example in the case of transmitting information relating to a “charging unit” and a “unit fee” will be described. In the example shown in FIG. 4 (a), the communication charges are uniformly distributed from the minimum value to the maximum value by K charge levels 1.
ＫK, and transmits a code indicating the charge level to the wireless terminal.

In the example shown in FIG. 4 (b), the charging information includes a "charging method", a "charging unit", and a "unit fee".
Is transmitted. Here, the content of each information element is represented by eight types of bit patterns “8” to “1”. For example, items to be charged, such as the number of packets (the number of packets per unit charge) and the communication time (communication time per unit charge), are defined as the contents of the "charging method". Any of bit patterns “8” to “1” associated in advance is transmitted.

The "charging unit" of the item to be charged
"Bps", "kbps", "se
Unit systems such as "c" and "min" are defined, and a bit pattern "8" previously associated with these unit systems.
To “1” is transmitted. In addition, "Unit fee"
A communication charge per unit time is defined as the content of the communication, and one of the bit patterns “8” to “1” associated in advance with the communication charge is transmitted.

In this example, the “charging method” bit pattern, the “charging unit” bit pattern, and the “unit charge”
Is formed as a set of billing information and transmitted. Further, the charging information indicating the above-mentioned charging level and the charging information including a bit pattern such as “charging method” may be appropriately combined. in this way,
The billing information may be any information that is useful in calculating the actually generated communication fee, and does not necessarily need to be information indicating the fee (amount) itself.

In order to set such charging information in a message, each radio base station uses a system (radio base station)
Before starting up, the charging information is stored in advance in a storage unit composed of a nonvolatile memory. Then, when the system (wireless base station) starts up, the charging information is read from the storage unit and transmitted to each wireless terminal. Thereafter, for example, the charging information is repeatedly transmitted every frame. By providing a serial interface or the like on the wireless base station side as an interface for writing the charging information into the storage unit (nonvolatile memory), the charging information can be easily set in the wireless base station from the outside.

Next, the operation of the wireless communication system according to the first embodiment will be described with reference to the flowchart shown in FIG. Step S10: First, as described above, each of the radio base stations A and B reads out charging information, which is information relating to a communication fee, from the storage unit and transmits it when the system starts up.

In the example shown in FIG. 1, the radio terminal C is located in an area where it can communicate with both the radio base stations A and B.
Charging information is received from each of the wireless base stations A and B. Each wireless base station transmits charging information, for example, using a predetermined channel that is first received when a wireless terminal connects to the wireless base station. Thereby, before the wireless terminal C is connected to the wireless base station, the wireless terminal C receives the charging information from the wireless base stations A and B, respectively.

Step S20: Subsequently, the wireless terminal C
The charging information is received from each of the radio base stations A and B, and a connection request is issued to one of the radio base stations according to the content of each charging information. In this step S20, the wireless terminal C
When the charging information is received from each of the plurality of wireless base stations A and B, the wireless base station selects the wireless base station offering the cheapest communication fee and issues a connection request to this wireless base station.

Here, the processing content of step S20 will be described in more detail with reference to the flowchart shown in FIG. Step S21A: First, the wireless terminal C searches for a wireless base station (AP) with which communication is possible, and acquires charging information. In the example shown in FIG. 1, the wireless base stations A and B are searched as wireless base stations that can communicate. Step S22A: Subsequently, the wireless terminal C grasps the number k of wireless base stations with which communication is possible. In this example, two radio base stations A and B have been searched, so that “2” is grasped as the number k of communicable radio base stations (that is, k = 2).

Step S23A: Subsequently, the wireless terminal C
Indicates that the value of the number k of wireless base stations is “k = 0”, “k =
1 or “k> 1”. Now, since the number k of the wireless base stations is “2”, “k”
> 1 ”is satisfied (step S
23A: k> 1). Step S24A: Subsequently, the radio terminal C compares the charging information of the plurality of communicable radio base stations A and B, and presents the cheapest communication fee among these radio base stations, Select the wireless base station that provides the service. In this example, it is assumed that the wireless base station A offers a lower communication fee than the wireless base station B, and the wireless base station A is selected. Step S25A: Subsequently, the wireless terminal C issues a connection request to the selected wireless base station A.

In the above step S23A,
If the number k of wireless base stations is determined to be “1” (step S23A: k = 1), it is not possible to compare the communication charges, so step S24A is not executed and step S24A is executed.
25 to issue a connection request to the only communicable wireless base station. Also, in step S23A, when the number k of wireless base stations is determined to be “0” (step S23A).
23A: k = 0), there is no communicable wireless base station, so in step S26A, the process for the case where communication is not possible is executed, and no connection request is issued. With the above, step S20
Is completed, and a connection request is issued from the wireless terminal to the wireless base station according to the contents of the charging information.

Here, the description is returned to the flowchart shown in FIG. Step S30: When the processing of steps S21A to S26A described above is completed, the radio base station A selected by the radio terminal C receives the connection request issued from the radio terminal C, and transmits data to the requesting radio terminal C. Is performed. Thus, a series of processes for connecting the wireless terminal to the wireless base station is completed, and the wireless terminal C is connected to the cheapest wireless base station capable of receiving the desired service. The communication that has been performed is now possible.

Embodiment 2 Hereinafter, a wireless communication system according to Embodiment 2 of the present invention will be described. The second embodiment will be described with reference to the drawings according to the first embodiment. In the above-described first embodiment, a wireless base station that presents the lowest communication fee is selected from a plurality of wireless base stations. It is configured to select a wireless base station that satisfies a desired charge set on the terminal side.

Specifically, the desired charge is set (registered) in advance in the wireless terminal C, and is replaced with step S20 in the flowchart shown in FIG. 5 according to the first embodiment and shown in FIG. Steps S21B to S26B are executed, whereby the wireless terminal C receives the charging information from each wireless base station, compares the desired charge set in advance with the communication charge presented by each wireless base station, and performs the comparison. A connection request is issued to the wireless base station in accordance with the result of (1). The above-mentioned desired fee is a communication fee desired by the user of the wireless terminal, and provided by the wireless terminal using a man-machine interface provided on a terminal such as a personal computer connected to the wireless terminal or the wireless terminal. It is stored in a non-volatile memory. Other configurations are the same as in the first embodiment.

The characteristic operation of the radio communication system according to the second embodiment will be described below with reference to the flowchart shown in FIG. When the processing in step S10 described above is executed and the charging information is transmitted from each wireless base station, the wireless terminal side performs steps S21B to S26 described below.
B is executed.

Step S21B: First, the wireless terminal C
A search is made for a wireless base station (AP) with which communication is possible, and charging information is obtained. In the example shown in FIG. 1, the wireless base stations A and B are searched as wireless base stations that can communicate. Step S22B: Subsequently, the wireless terminal C determines whether or not there is a wireless base station presenting a communication fee lower than the desired fee among the wireless base stations that can communicate.

Step S23B: If there is a wireless base station presenting a communication charge lower than the desired charge (step S22B: YES), the value of the number k of the wireless base stations is
It is determined whether the relationship “k> 1” is satisfied. Step S24B: Here, if both the radio base stations A and B are presenting a communication fee lower than the desired fee,
The number k of wireless base stations is “2”, and the relationship “k> 1” is satisfied.

Step S24B: When it is determined that the number k of wireless base stations satisfies the relationship of “k> 1” (step S23B: YES), that is, a plurality of wireless base stations present a low communication fee. If so, the wireless base station that presents the cheapest communication fee is extracted (selected) from these. Step 25B: Then, a connection request is issued to the wireless base station extracted in step S24B. Thus, a series of processes of steps S21B to S26B is completed,
A connection request is issued from the wireless terminal to the wireless base station according to the contents of the charging information.

In the above step S22B,
When it is determined that there is no wireless base station presenting a communication fee lower than the desired fee (step S22B: N
O) In step S26B, the process in the case where communication is not possible is executed, and no connection request is issued. Further, in the above step S23B, when it is determined that the number k of the wireless base stations satisfies the relationship “k> 1” (step S23B:
NO), only one wireless base station presents a communication fee lower than the desired fee, and there is no choice. Therefore, in this case, step S25B is executed without executing step S24B, and a connection request is issued to the radio base station. As described above, a connection request is issued from the wireless terminal to the wireless base station according to the content of the billing information. Thereafter, step S30 shown in FIG. 5 described above is executed, and data transmission / reception processing (predetermined processing) is executed.

According to the first and second embodiments,
The following effects can be obtained. That is, the wireless base station is installed at a specific place, and a communication fee limited to a place or a communication fee for each wireless base station can be set. Therefore, the communication carrier can flexibly set the communication fee, notify the user of the set communication fee, and select the user to receive the service based on the communication fee.
In addition, communication charges can be set for each wireless base station,
The communication fee can be reported as service information of the wireless base station. For this reason, it is possible to notify the user of a flexible communication fee appropriate for the service.

As described above, by setting the communication fee flexibly and notifying the set communication fee, the user having the wireless terminal can select the wireless base station to be connected. Therefore, since the wireless terminal always receives the charge information from the wireless base station, it is not necessary to previously hold the communication charge for each communication carrier in the wireless terminal. Moreover, since the charge information (charging information) is always broadcast to each wireless terminal as broadcast information from the wireless base station, all receivable wireless base stations can be selected and the latest charge information can be obtained. It is also possible to do.

Further, according to the first embodiment, a radio terminal can be connected to a radio base station providing a service at the lowest communication rate from among a plurality of radio base stations, and a user is charged. It is possible to minimize the required communication fee. Furthermore, according to the second embodiment, a wireless base station that presents a communication charge equal to or less than the desired charge by presetting a desired charge that gives the wireless terminal a reference for connection is provided. Wireless terminal can be connected to a wireless base station that provides the service. Therefore, even if there is a communicable wireless base station, if the communication fee exceeds the desired fee, no communication is performed, and the highest priority can be given to economy.

The embodiments of the present invention have been described above. However, the present invention is not limited to these embodiments, and the present invention is applicable even if there is a design change without departing from the gist of the present invention. include. For example, in Embodiments 1 and 2 described above, the wireless terminal automatically selects a wireless base station. For example, the wireless terminal receives information (charging information) related to a communication fee and transmits this information. A notification may be sent to the user of the wireless terminal, and upon receiving an instruction from the user, a connection request may be issued to the wireless base station. Thus, the user can freely select the wireless base station with reference to the information (connection NW, used bandwidth, etc.) and the communication charge included in the wireless base station equipment included in the billing information, and economically ( It is possible to select between giving priority to cost) and giving priority to communication quality (service quality). Further, in each of the above-described embodiments, the case where the number of wireless base stations is two and the number of wireless terminals is one has been described as an example, but the number is arbitrary.

[0049]

According to the present invention, the following unique effects can be obtained. That is, on the wireless base station side, information on the communication fee is transmitted to the wireless terminal, and upon receiving a connection request from the wireless terminal, a predetermined process is executed.
Since the information is received from the wireless base station and a connection request is issued to the wireless base station according to the content of the information, the communication fee can be flexibly set according to the wireless base station used. In addition, the user can flexibly select a radio base station according to the communication fee.

Therefore, it is possible to set a flexible charge on the side of operating the wireless base station and improve the serviceability, and to obtain the communication charge without holding the information on the communication charge on the wireless terminal side. In addition, since the user can know the communication fee in advance, the user can start communication with ease and can easily connect to a wireless base station providing a cheaper communication service.

Also, the wireless terminal receives information on communication charges from a plurality of wireless base stations, selects the wireless base station that presents the cheapest communication charges, and issues the connection request. The radio base station can be selected while minimizing the communication fee charged to the side.

Further, the wireless terminal receives the information on the communication charge, compares the desired charge registered in advance with the communication charge presented by the wireless base station, and, based on the result of the comparison, connects to the wireless base station. Since the request is issued, the radio base station can be selected with the highest priority given to economy.

Further, the wireless terminal receives the information on the communication fee, notifies the user of the information, and issues the connection request to the wireless base station in response to the instruction from the user. Thus, it is possible to select a radio base station by reflecting the user's intention.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a wireless communication system according to a first embodiment of the present invention.

FIG. 2 is a diagram showing an example of items for determining charging information of the wireless communication system according to the first exemplary embodiment of the present invention.

FIG. 3 is a diagram for explaining a flow of a communication fee when the wireless base station according to the first embodiment of the present invention is used for a quasi-public.

FIG. 4 is a diagram showing an example of a message format of charging information transmitted by the radio base station according to the first embodiment of the present invention.

FIG. 5 is a flowchart showing a flow of an overall operation of the wireless system according to the first embodiment of the present invention.

FIG. 6 shows an operation flow of the wireless system according to the first embodiment of the present invention (a method of selecting the cheapest wireless base station).
It is a flowchart which shows.

FIG. 7 is a flowchart showing a flow of an operation of the wireless system according to the second exemplary embodiment of the present invention (a method of selecting a wireless base station based on a reference fee set by a wireless terminal).

[Explanation of symbols]

A, B: wireless base station C: wireless terminal RA, RB: communication area S10, S20, S30: step (overall operation) S21A to S26A: step (wireless base station selection processing in the first embodiment) S21B to S26B: Step (Wireless base station selection processing in Embodiment 2)

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Junichi Iwatani 2-3-1 Otemachi, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation F-term (reference) 5K025 AA08 BB06 DD06 FF17 JJ02 KK06 5K067 AA29 BB04 DD29 EE04 EE10 FF04 FF23 GG01 HH22 HH23 JJ72 KK15

Claims (9)

[Claims] 1. A wireless base station that transmits information related to a communication charge to a wireless terminal, executes a predetermined process in response to a connection request from the wireless terminal, and receives the information from the wireless base station; And a wireless terminal that issues the connection request to the wireless base station according to the content. 2. The wireless terminal receives information on the communication fee from a plurality of wireless base stations, selects the wireless base station presenting the cheapest communication fee, and issues the connection request. The wireless communication system according to claim 1. 3. The wireless terminal receives the information on the communication fee, compares a desired fee registered in advance with a communication fee presented by the wireless base station, and, based on a result of the comparison, determines the connection request. The wireless communication system according to claim 1, wherein 4. The wireless terminal according to claim 1, wherein the wireless terminal receives the information related to the communication fee, notifies the user of the information, and issues the connection request in response to an instruction from the user. A wireless communication system as described. 5. The wireless communication system according to claim 1, wherein the wireless base station includes a storage unit that stores information on the communication charge in advance. 6. A wireless communication method in a wireless communication system including a wireless base station and a wireless terminal, wherein: (a) the wireless base station periodically transmits information on a communication fee to the wireless terminal. (B) a second step in which the wireless terminal receives the information from the wireless base station and issues a connection request to the wireless base station in accordance with the content of the information; A) a third step in which the radio base station executes the predetermined process in response to the connection request. 7. In the second step, the wireless terminal receives the information from a plurality of wireless base stations, respectively, selects a wireless base station that presents the cheapest communication fee, and issues the connection request. The wireless communication method according to claim 6, wherein: 8. In the second step, the wireless terminal receives the information, compares a desired charge set in advance with a communication charge presented by the wireless base station, and responds to the result of the comparison. The wireless communication method according to claim 6, wherein the connection request is issued by a wireless communication method. 9. In the second step, the wireless terminal receives the information, notifies the user of the information, and issues the connection request in response to an instruction from the user. The wireless communication method according to claim 6, wherein