JP2000023242A - Mobile communication system and radio communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a frequency of using high speed communication services increased and to transmit information of a large capacity for a short time by utilizing service and communicating when the high speed communication services enter an available state within a specified time after a communication demand from a mobile terminal and/or the communication demand to the mobile terminal. SOLUTION: When a communication demand through second radio base station BSB2 occurs at a mobile terminal MS by a user operation or the like, a timer within a mobile terminal MS3 is started. If communication by way of the second radio base station BSB2 becomes possible until a timer value reaches a standby limit time, a communication demand is transmitted to a communication network through the second radio base station BSB2. When the timer value reaches the standby limit time, it is judged that the communication through the second radio base station BSB2 is impossible. In this case, it is possible to communication at low speed by being connected to a first radio base station BSA1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system, and more particularly to a wireless communication system in a mobile communication system including a plurality of types of wireless base stations having different communication speeds.

[0002]

2. Description of the Related Art In recent years, a mobile communication system for providing a high-speed information communication service wirelessly to a moving user has been studied. As one of the mobile communication systems for performing such high-speed transmission, a system in which two wireless communication means having different properties are combined is being studied.

That is, the mobile terminal communicates with both the first wireless communication means having a low transmission rate but a large service area and the second wireless communication means having a high transmission rate but a small service area. A mobile communication system connectable to the means has attracted attention. In such a mobile communication system, for example, the first wireless communication means is suitable for voice communication, and the second wireless communication means is suitable for large-capacity data communication.
Here, as a procedure when the mobile terminal performs data communication, first, as shown in the example of FIG. 9, communication with the second wireless communication means is attempted, and then communication with the first wireless communication means is performed. Try.

[0004] For example, when a request for communication via the second radio base station occurs in the mobile terminal due to a user operation or the like, it is determined whether communication is possible via the second radio base station. If possible, a communication request is transmitted to the communication network via the second wireless base station. On the other hand, when it is determined that communication via the second wireless base station is not possible, it is determined whether communication via the first wireless base station is possible. If possible, a communication request is transmitted to the communication network via the first wireless base station. On the other hand, if it is determined that communication via the first wireless base station is not possible, the operation ends.

[0005] As described above, it is necessary for the mobile terminal to select which wireless communication means to connect to at the start of communication for each communication. Although the second wireless communication means is particularly suitable for performing data communication, in the method described above, if the mobile terminal is not in the service area of the second wireless communication means, the first wireless communication means Communication is performed via the communication, and a problem occurs that much time is required until the communication is completed.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems of the mobile communication system and to provide a high-speed communication service to a mobile terminal performing data communication. An object of the present invention is to provide a mobile communication system capable of increasing the frequency of using communication means and transmitting a large amount of information in a short time.

[0007]

In order to achieve the above object, a mobile communication system according to the present invention comprises: a first radio communication means capable of providing a radio communication service to a mobile terminal;
Mobile communication comprising second wireless communication means capable of providing a wireless communication service to the mobile terminal at a higher speed than the first wireless communication means in a geographically narrower range than the first wireless communication means. In the system, after a request for communication from the mobile terminal and or a request for communication to the mobile terminal,
If the mobile terminal becomes able to use the second wireless communication means within a predetermined time, the mobile terminal communicates using the second wireless communication means, and the mobile terminal communicates within the predetermined time. When the terminal does not enter a state where the second wireless communication unit can be used, the mobile terminal performs communication using the first wireless communication unit.

Further, the mobile communication system according to the present invention includes a first wireless communication unit capable of providing a wireless communication service to a mobile terminal, and a mobile communication system in a geographically narrower range than the first wireless communication unit. In a mobile communication system including a second wireless communication unit capable of providing a wireless communication service faster than the first wireless communication unit to the mobile terminal, an amount of information to be communicated by the mobile terminal is predetermined. If the amount of information is larger than the amount of information, the mobile terminal can use the second wireless communication means within a predetermined time after a request for communication from the mobile terminal or a request for communication to the mobile terminal. The mobile terminal communicates using the second wireless communication means, and if the mobile terminal does not become able to use the second wireless communication means within the predetermined time, the mobile terminal End is characterized in that communicate using the first wireless communication means.

Further, in the mobile communication system according to the present invention, when the amount of information to be communicated by the mobile terminal is not larger than a predetermined amount of information, a request for communication from the mobile terminal or communication to the mobile terminal is provided. Immediately after the request of
The mobile terminal communicates using the first wireless communication unit.

[0010] The mobile communication system of the present invention further comprises a first wireless communication means capable of providing a wireless communication service to a mobile terminal, and the first wireless communication means in a geographically narrower range than the first wireless communication means. In a mobile communication system including a second wireless communication unit capable of providing a wireless communication service faster than the first wireless communication unit to the mobile terminal, a request for communication from the mobile terminal or a request for communication to the mobile terminal. After the request, if the predicted time until the mobile terminal can use the second wireless communication means is shorter than a predetermined time, the mobile terminal can use the second wireless communication means. Waiting for a predetermined time until the state is reached, and when the predetermined time is exceeded, providing a communication service to the mobile terminal using the first wireless communication means.

Further, in the mobile communication system according to the present invention, when the predicted time until the mobile terminal can use the second radio means is not shorter than a predetermined time, the communication from the mobile terminal is not performed. Immediately after the request or the request for communication to the mobile terminal, the mobile terminal communicates using the first wireless communication means.

Further, according to the mobile communication method of the present invention, the first wireless communication means capable of providing a wireless communication service to a mobile terminal, and the first wireless communication means in a geographically narrower range than the first wireless communication means. In a wireless communication method used in a mobile communication system including a second wireless communication unit capable of providing a wireless communication service faster than the first wireless communication unit to the mobile terminal, a communication from the mobile terminal is provided. A first step of detecting whether or not the mobile terminal can use the second wireless communication means within a predetermined time after the request and / or a request for communication to the mobile terminal; and If the mobile terminal determines that the second communication means can be used, the mobile terminal communicates with the communication terminal.
A second step of using the second communication means, and if the mobile terminal determines in the first step that the second wireless communication means cannot be used, the second communication step is performed for communication with the mobile terminal. And a third step of using the first wireless communication means.

[0013] Further, the wireless communication method of the present invention includes a first wireless communication means capable of providing a wireless communication service to a mobile terminal; In a wireless communication method used in a mobile communication system including a second wireless communication unit capable of providing a wireless communication service higher in speed than the first wireless communication unit to the mobile terminal, the mobile terminal may communicate. A first step of detecting whether or not the information amount of the information is greater than a predetermined information amount, and after a request for communication from the mobile terminal and / or a request for communication to the mobile terminal, within a predetermined time, The second step of detecting whether the mobile terminal can use the second wireless communication means and the first step determine that the information amount is larger than the predetermined information amount, and Two When the mobile terminal determines that the second communication means can be used by the step (i), a third step of using the second communication means for communication with the communication terminal; By the steps of
It is determined that the information amount is larger than the predetermined information amount,
And the mobile terminal performs the second
When it is determined that the second communication means is not available, the method comprises a fourth step of using the first wireless communication means for communication with the mobile terminal.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a mobile communication system using a mobile communication system according to an embodiment of the present invention. A mobile communication system using the mobile communication system of the present embodiment is a first wireless communication unit that provides a wireless communication service to a mobile terminal, and in a geographically narrower range than the first wireless communication unit, And a second wireless communication means for providing a wireless communication service faster than the first wireless communication means.

In FIG. 1, the mobile communication system includes a plurality of first wireless base stations BSA1, BSA1, as first wireless communication means.
And a plurality of second wireless base stations as second wireless communication means
Contains BSB2. The mobile communication system additionally includes the first wireless base station BSA1 and the second wireless base station BS
It comprises a communication network 102 to which B2 is connected, and a plurality of mobile terminals MS3 capable of receiving communication services from these radio base stations. Further, a communication control device 101 for controlling communication may be connected to the communication network in the mobile communication system, and the fixed terminal 100 may be connected to the communication network 102 by wire.

Here, as shown in the block diagram of FIG.
The communication network connected for each communication means may be physically or logically different. That is, in the example of FIG. 2, the first wireless base station BSA1 is connected to the first communication network 103, and the second wireless base station BSB2 is connected to the second communication network 104. In this case, the communication control device 101 is further connected to both the first communication network 103 and the second communication network 104, and such a configuration is also possible.

Next, as an example of the operation of the mobile communication system in the mobile communication system configured as described above, a request for communication from a mobile terminal or a request for communication to a mobile terminal,
An operation in a case where the mobile terminal waits for a predetermined time until the mobile terminal can use the second wireless communication unit will be described with reference to a flowchart of FIG.

First, an example of the operation when the mobile terminal issues a request for communication via the second radio base station will be described with reference to the flowchart of FIG. For example, when a request for communication via the second wireless base station BSB2 occurs in the mobile terminal due to a user operation or the like (301), a timer in the mobile terminal is started (302), and the second wireless base station is started. It is determined whether communication is possible via the BSB 2 (303). If possible, a communication request is transmitted to the communication network via the second radio base station BSB2, and the timer is stopped (304 → 305).
On the other hand, if it is determined that communication via the second wireless base station BSB2 is not possible, it is determined whether communication via the second wireless base station BSB2 is possible until the timer value reaches the standby limit time. Observe or not. If communication via the second radio base station BSB2 becomes possible before the timer value reaches the standby limit time, a communication request is transmitted to the communication network via the second radio base station BSB2. (306). When the timer value reaches the standby time limit, it is determined that communication via the second radio base station BSB2 is impossible, the timer is stopped, and the operation ends (307). In this case, the user is notified of the second radio base station BSB
2 may not be communicated.

Further, as shown in the flow chart of FIG. 4, communication may be performed via the first radio base station BSA1. After stopping the timer, it is determined whether communication via the first wireless base station BSA1 is possible (405 to 406).
If possible, a communication request is transmitted to the communication network via the first radio base station BSA1 (407). On the other hand, when it is determined that communication via the first wireless base station BSA is not possible, the operation is terminated (410). In this case, the user may be informed that communication via the first wireless base station BSA1 is not possible.

As described above, according to the mobile communication system of the present embodiment, after a communication request is generated in a mobile terminal, it takes a predetermined time until communication with a second wireless base station capable of high-speed communication is enabled. By waiting, the mobile terminal is more likely to receive a high-speed communication service, and can transmit a large amount of information in a short time.

Further, even if communication with the second wireless base station becomes impossible, by connecting to the first wireless base station, communication can be performed at a low speed. Furthermore, since a mobile terminal that communicates a large amount of information is more likely to be connected to the second wireless base station, a second terminal capable of performing low-speed communication for voice communication, small-capacity data communication, and the like is provided. A mobile terminal desiring communication via one wireless base station is easily connected to the first wireless base station.

Next, an example of the operation when a request for communication via the second wireless base station is issued from another terminal to a mobile terminal will be described with reference to the flowchart of FIG. Here, the other terminal may be a fixed terminal or a mobile terminal. For example, from a terminal to a mobile terminal, a second radio base station BS
When a request for communication via B2 occurs, for example, the communication control device 101 starts an internal timer, and the second radio base station BS
It is determined whether communication is possible via B2 (303). This means that the mobile terminal calls the mobile terminal via the second radio base station BSB2 in the call area where the location is registered, and it can be determined that communication is possible if there is a response from the mobile terminal,
If there is no response, it can be determined that communication is not possible. If communication is possible, a communication request is transmitted to the mobile terminal via the second radio base station BSB2, and the timer is stopped (30).
5).

On the other hand, if it is determined that communication via the second wireless base station BSB 2 is not possible, communication via the second wireless base station BSB 2 is continued until the timer value reaches the standby limit time. Observe whether is possible. This is possible, for example, by calling the mobile terminal periodically. Also, the mobile terminal calls the mobile terminal via the first wireless base station BSA 1 in the call area where the location is registered, and the mobile terminal calls the second wireless base station BSB 2 within the waiting time limit. A method of instructing the communication control device to notify when the communication via the terminal becomes possible is also possible.

In this case, when the communication control device 101 receives a notification from the mobile terminal that communication via the second radio base station BSB2 is enabled, the timer is stopped (30).
5). In any case, if the mobile terminal can communicate via the second radio base station BSB2 before the timer value reaches the standby limit time, the mobile terminal can communicate via the second radio base station BSB2. Send a request to the mobile terminal. When the timer value reaches the standby time limit, it is determined that communication via the second radio base station BSB2 is impossible, the timer is stopped, and the operation ends (307). In this case, the originating terminal may be notified that communication via the second radio base station BSB is not possible.

Further, as shown in the flowchart of FIG. 4, communication may be performed via the first radio base station BSA1. After stopping the timer, it is determined whether communication via the first radio base station BSA1 is possible. If possible,
A communication request is transmitted to the communication network via the first radio base station BSA. On the other hand, if it is determined that communication via the first radio base station BSA is not possible, the operation ends. In this case, the originating terminal may be notified that communication via the first radio base station BSA is not possible.

As described above, according to the mobile communication system of the present embodiment, after a communication request is issued to a mobile terminal, the mobile communication system can communicate with a second wireless base station capable of high-speed communication. By waiting for a predetermined time, the mobile terminal is easily connected to the second wireless base station, and can transmit a large amount of information in a short time. Further, even if communication with the second wireless base station becomes impossible, by connecting to the first wireless base station, communication can be performed at a low speed. Furthermore, since a mobile terminal that communicates a large amount of information is more likely to be connected to the second wireless base station, a second terminal capable of performing low-speed communication for voice communication, small-capacity data communication, and the like is provided. A mobile terminal desiring communication via one wireless base station is easily connected to the first wireless base station.

Next, another embodiment of the mobile communication system in the mobile communication system configured as described above will be described. In the present embodiment, when the amount of information to be communicated by the mobile terminal is larger than a certain threshold, the mobile terminal transmits to the second wireless communication means after a request for communication from the mobile terminal or a request for communication to the mobile terminal. The operation in the case of waiting for a predetermined time until the state becomes available will be described with reference to the flowchart of FIG.

First, an example of the operation when the mobile terminal issues a request for communication via the second radio base station will be described with reference to the flowchart of FIG. For example, when a request for communication occurs in the mobile terminal due to a user operation or the like, the mobile terminal checks whether the amount of information to be communicated from now on is larger than a predetermined threshold (502). If it is determined that it is smaller than the threshold value, it is possible to communicate via the first radio base station BSA1. First, the first radio base station BS
It is determined whether communication via A1 is possible (507). If possible, a communication request is transmitted to the communication network via the first radio base station BSA1 (508). If it is determined that communication via the first radio base station BSA1 is not possible, the operation is terminated. In this case, the user may be notified that communication via the first wireless base station BSA1 is not possible (509).

On the other hand, if it is determined that the value is larger than the threshold,
A timer in the terminal is started to determine whether communication is possible via the second radio base station BSB2 (503 to 504). If possible, a communication request is transmitted to the communication network via the second radio base station BSB2, and the timer is stopped (510).
511). If it is determined that communication via the second wireless base station BSB2 is not possible, it is determined whether communication via the second wireless base station BSB2 is possible until the timer value reaches the standby limit time. Observe. If communication via the second radio base station BSB 2 becomes possible before the timer value reaches the standby time limit, a communication request is transmitted to the communication network via the second radio base station BSB and the timer is transmitted. Is stopped (505 to 506).
When the timer value reaches the waiting time limit, the second radio base station
It determines that communication via BSB 2 is impossible, stops the timer, and ends the operation. In this case, the user may be notified that communication via the second wireless base station BSB2 is not possible.

Further, as shown in the flowchart of FIG. 6, communication may be performed via the first radio base station BSA1. After the timer is stopped, it is determined whether communication via the first wireless base station BSA1 is possible (603 to 604).
If possible, a communication request is transmitted to the communication network via the first wireless base station BSA1 (610 to 611).
On the other hand, if it is determined that communication via the first radio base station BSA1 is not possible, the operation is terminated (607-). In this case, the user may be notified that communication via the first wireless base station BSA1 is impossible (609).

As described above, according to the mobile communication system of this embodiment, after a request for transmitting a large amount of data is generated in a mobile terminal, communication with a second wireless base station capable of high-speed communication is enabled. By waiting for a predetermined time until
The mobile terminal is easily connected to the second radio base station, and can transmit a large amount of information in a short time.

Further, even if communication with the second radio base station is not possible, communication with the first radio base station can be performed at a low speed. Furthermore, since a mobile terminal that communicates a large amount of information is more likely to be connected to the second wireless base station, a second terminal capable of performing low-speed communication for voice communication, small-capacity data communication, and the like is provided. A mobile terminal desiring communication via one wireless base station is easily connected to the first wireless base station.

Next, an example of the operation when another terminal issues a request for communication via the second radio base station to the mobile terminal will be described with reference to the flowchart of FIG. Here, the other terminal may be a fixed terminal or a mobile terminal. For example, when a communication request is issued from a certain terminal to a mobile terminal, for example, the communication control device 101 checks whether or not the amount of information to be communicated from now on is larger than a predetermined threshold.

When it is determined that the value is smaller than the threshold value, communication can be performed via the first radio base station BSA1. First, it is determined whether communication via the first wireless base station BSA is possible. This is because the mobile terminal calls the mobile terminal via the first radio base station BSA in the call area where the location is registered, and if there is a response from the mobile terminal, it can be determined that communication is possible. It can be determined that communication is not possible. If communication is possible, a communication request is transmitted to the mobile terminal via the first radio base station BSA. If it is determined that communication via the first wireless base station BSA is not possible, the operation is terminated. In this case, the user may be notified that communication via the first wireless base station BSA is not possible.

On the other hand, when it is determined that the value is larger than the threshold value,
For example, the communication control device 101 starts an internal timer and determines whether communication is possible via the second radio base station BSB. This is because the mobile terminal calls the mobile terminal via the second radio base station BSB in the call area where the location is registered, and if there is a response from the mobile terminal, it can be determined that communication is possible. It can be determined that communication is not possible. If communication is possible, a communication request is transmitted to the mobile terminal via the second radio base station BSB, and the timer is stopped. If it is determined that communication via the second wireless base station BSB is not possible, it is monitored whether communication via the second wireless base station BSB is possible until the timer value reaches the standby limit time. . This is possible, for example, by calling the mobile terminal periodically. In addition, the mobile terminal calls the mobile terminal via the first wireless base station BSA in the call area where the location is registered, and the mobile terminal transmits via the second wireless base station BSB within the waiting time limit. When communication becomes possible, a method of instructing the communication control device 101 to notify is also possible.

In this case, when the communication control device 101 receives a notification from the mobile terminal that communication via the second radio base station BSB is enabled, the timer is stopped. In any case, if the mobile terminal is enabled to communicate via the second radio base station BSB before the timer value reaches the standby limit time, a communication request is issued via the second radio base station BSB. Transmit to the mobile terminal. When the timer value reaches the standby limit time, it determines that communication via the second radio base station BSB is impossible, stops the timer, and ends the operation.

In this case, the user is given a second radio base station BSB
It may be communicated that communication via is impossible. further,
As shown in the flowchart of FIG. 6, communication may be performed via the first radio base station BSA. After stopping the timer, it is determined whether communication via the first radio base station BSA is possible. If possible, a communication request is transmitted to the mobile terminal via the first radio base station BSA. On the other hand, if it is determined that communication via the first radio base station BSA is not possible, the operation ends. In this case, the user may be notified that communication via the first wireless base station BSA is not possible.

As described above, according to the mobile communication system of this embodiment, after a request for transmitting a large amount of data to a mobile terminal occurs, the mobile terminal communicates with the second wireless base station capable of high-speed communication. By waiting for a predetermined time until it becomes possible,
The mobile terminal is easily connected to the second radio base station, and can transmit a large amount of information in a short time. Further, even if communication with the second wireless base station becomes impossible, by connecting to the first wireless base station, communication can be performed at a low speed.

Furthermore, since a mobile terminal that communicates a large amount of information is more likely to be connected to the second radio base station, low-speed communication is performed for voice communication and small-capacity data communication. A mobile terminal wishing to communicate via a possible first radio base station is more likely to connect to the first radio base station.

Next, another embodiment of the mobile communication system of the present invention will be described. In the present embodiment, after the request for communication from the mobile terminal or the request for communication to the mobile terminal, the estimated time until the mobile terminal can use the second wireless communication means is smaller than a predetermined time. In this case, the operation in the case where the mobile terminal waits for a predetermined time until the mobile terminal can use the second wireless communication means will be described with reference to the flowchart of FIG.

First, an example of the operation when the mobile terminal issues a request for communication via the second radio base station will be described with reference to the flowchart of FIG. For example, when a request for communication occurs at the mobile terminal due to a user operation or the like, the mobile terminal is ready to communicate with the second radio base station BSB based on, for example, the past history, location, and time. Is predicted, and the predicted time is compared with a threshold (70).
2). The operation of this embodiment may be performed when the amount of information to be communicated by the mobile terminal is larger than a certain threshold.

If the predicted time is smaller than the threshold value, a timer in the mobile terminal is started to determine whether communication is possible via the second radio base station BSB (703 to 704). If possible, a communication request is sent to the communication network via the second radio base station BSB and the timer is stopped.

On the other hand, if it is determined that communication via the second wireless base station BSB is not possible, communication via the second wireless base station BSB is enabled until the timer value reaches the standby limit time. Observe whether or not. If communication via the second radio base station BSB becomes possible before the timer value reaches the standby limit time, a communication request is transmitted to the communication network via the second radio base station BSB (705). ). When the timer value reaches the standby time limit, it is determined that communication via the second radio base station BSB is impossible, the timer is stopped, and the operation is terminated (706).

In this case, the user is informed of the second radio base station BSB.
It may be communicated that communication via is impossible. further,
As shown in the flowchart of FIG. 7, communication may be performed via the first radio base station BSA. After stopping the timer, it is determined whether communication via the first radio base station BSA is possible. If possible, a communication request is transmitted to the communication network via the first radio base station BSA. On the other hand, if it is determined that communication via the first radio base station BSA is not possible, the operation ends. In this case, the user may be notified that communication via the first wireless base station BSA is not possible.

On the other hand, if the prediction time is larger than the threshold,
The communication via the second radio base station BSB is stopped and the operation is terminated. In this case, the user may be informed that communication via the second radio base station BSB is not possible. As shown in the flowchart of FIG. 8, communication may be performed via the first radio base station BSA. That is, the mobile terminal determines whether communication via the first radio base station BSA is possible.
If possible, a communication request is transmitted to the communication network via the first radio base station BSA. On the other hand, if it is determined that communication via the first radio base station BSA is not possible, the operation ends. In this case, the user is asked the first radio base station BS
The communication via A may not be possible.

As described above, according to the mobile communication system of this embodiment, after a request for communication is generated in the mobile terminal,
The mobile terminal that is predicted to be able to communicate with the second wireless base station in a short time, waits for a predetermined time until it becomes possible to communicate with the second wireless base station capable of high-speed communication, Is easily connected to the second wireless base station, and even a large amount of information can be transmitted in a short time. It was also predicted that communication with the second radio base station would not be possible within a predetermined time period, or that communication with the second radio base station would not be possible within a short time after a request for communication occurred. In this case, by connecting to the first wireless base station, communication can be performed at a low speed.

Further, since a mobile terminal that communicates a large amount of information is more likely to be connected to the second radio base station, low-speed communication is performed for voice communication and small-capacity data communication. A mobile terminal wishing to communicate via a possible first radio base station is more likely to connect to the first radio base station.

Next, an example of an operation when a request for communication via the second radio base station is issued from another terminal to a mobile terminal will be described with reference to a flowchart of FIG. Here, the other terminal may be a fixed terminal or a mobile terminal. For example, when a communication request is issued from a certain terminal to a mobile terminal, for example, the communication control apparatus 101 determines, for example, from the past history of the mobile terminal to a state where communication with the second wireless base station BSB is possible. Predict the time and compare the predicted time to a threshold. Here, the mobile terminal calls the mobile terminal via the first radio base station BSA in the call area where the location is registered, confirms the location, and uses the information such as the position and time to perform the mobile terminal. It is also possible to predict the time until the terminal becomes communicable with the second radio base station BSB. The operation of this embodiment may be performed when the amount of information to be communicated by the mobile terminal is larger than a certain threshold.

If the predicted time is smaller than the threshold value, for example, a timer in the communication control device 101 is started to determine whether or not the mobile terminal can communicate via the second radio base station BSB. This is because the mobile terminal calls the mobile terminal via the second radio base station BSB in the call area where the location is registered, and if there is a response from the mobile terminal, it can be determined that communication is possible. It can be determined that communication is not possible. If communication is possible, a communication request is transmitted to the mobile terminal via the second radio base station BSB, and the timer is stopped. on the other hand,
If it is determined that communication via the second wireless base station BSB is not possible, the timer value is set to the standby time limit.
Observe whether communication via the second radio base station BSB is possible. This is possible, for example, by calling the mobile terminal periodically. Also, the mobile terminal calls the mobile terminal via the first wireless base station BSA in the call area where the location is registered, and the mobile terminal receives the call via the second wireless base station BSB within the waiting time limit. When communication becomes possible, a method of instructing the communication control device 101 to notify is also possible. In this case, when the communication control device 101 receives a notification from the mobile terminal that communication via the second radio base station BSB is enabled, the timer is stopped. In either case, before the timer value reaches the waiting time limit,
When the mobile terminal is enabled to communicate via the second radio base station BSB, the mobile terminal transmits a communication request to the mobile terminal via the second radio base station BSB. When the timer value reaches the standby limit time, it determines that communication via the second radio base station BSB is impossible, stops the timer, and ends the operation.

In this case, the user is given a second radio base station BSB
It may be communicated that communication via is impossible. further,
As shown in the flowchart of FIG. 7, communication may be performed via the first radio base station BSA. After stopping the timer, it is determined whether communication via the first radio base station BSA is possible. If possible, a communication request is transmitted to the mobile terminal via the first radio base station BSA. On the other hand, if it is determined that communication via the first radio base station BSA is not possible, the operation ends. In this case, the user may be notified that communication via the first wireless base station BSA is not possible.

On the other hand, if the prediction time is larger than the threshold,
The communication via the second radio base station BSB is stopped and the operation is terminated. In this case, the user may be informed that communication via the second radio base station BSB is not possible. Further, as shown in the flowchart of FIG. 7, communication may be performed via the first radio base station BSA. That is, the mobile terminal determines whether communication via the first radio base station BSA is possible.
This means that the mobile terminal calls the mobile terminal via the first radio base station BSA in the call area where the location is registered, and if there is a response from the mobile terminal, it can be determined that communication is possible,
If there is no response, it can be determined that communication is not possible. If communication is possible, a communication request is transmitted to the mobile terminal via the first radio base station BSA. Meanwhile, the first wireless base station BSA
If it is determined that the communication via is impossible, the operation ends.

In this case, the first radio base station BSA
It may be communicated that communication via is impossible. As described above, according to the mobile communication system of the present embodiment, after a communication request is issued to the mobile terminal, the mobile terminal that is expected to be able to communicate with the second wireless base station in a short time is ,
By waiting for a predetermined time until communication with the second wireless base station capable of high-speed communication becomes possible, the mobile terminal is easily connected to the second wireless base station, and even if a large amount of information is transmitted, Can be transmitted. It was also predicted that communication with the second radio base station would not be possible within a predetermined time period, or that communication with the second radio base station would not be possible within a short time after a request for communication occurred. In this case, by connecting to the first wireless base station, communication can be performed at a low speed. Furthermore, since a mobile terminal that communicates a large amount of information is more likely to be connected to the second wireless base station, a second terminal capable of performing low-speed communication for voice communication, small-capacity data communication, and the like is provided. A mobile terminal desiring communication via one wireless base station is easily connected to the first wireless base station.

[0053]

As described above, according to the present invention, after a communication request is issued to a mobile terminal or at the mobile terminal, a mobile terminal attempting to perform a large-capacity communication,
A mobile terminal or the like, which is predicted to be able to communicate with a wireless base station capable of high-speed communication in a short time, waits for a predetermined time until it can communicate with a wireless base station capable of high-speed communication. The terminal is easily connected to a wireless base station capable of high-speed communication, and can transmit a large amount of information in a short time.

Further, even if communication with the second radio base station is not possible within a predetermined time, or if communication with the second radio base station is not possible within a short time after a request for communication has occurred. When it is predicted, for example, by connecting to a low-speed wireless base station, communication can be performed at a low speed.

Further, since the possibility that a mobile terminal or the like that communicates a large amount of information is connected to the first radio base station is high, low-speed communication is required for voice communication and small-capacity data communication. A mobile terminal that wants to communicate via the second wireless base station that can perform the connection is easily connected to the second wireless base station.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration example of a mobile communication system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration example of a mobile communication system according to an embodiment of the present invention.

FIG. 3 is a flowchart showing a procedure of a mobile communication system according to the embodiment of the present invention.

FIG. 4 is a flowchart showing a procedure of a mobile communication system according to the embodiment of the present invention.

FIG. 5 is a flowchart showing a procedure of a mobile communication system according to the embodiment of the present invention.

FIG. 6 is a flowchart showing a procedure of a mobile communication system according to the embodiment of the present invention.

FIG. 7 is a flowchart showing a procedure of a mobile communication system according to the embodiment of the present invention.

FIG. 8 is a flowchart showing a procedure of a mobile communication system according to the embodiment of the present invention.

FIG. 9 is a flowchart showing an example of a procedure of a conventional mobile communication system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... First radio base station (BSA) 2 ... Second radio base station (BSB) 3 ... Mobile terminal (MS) 100 ... Fixed terminal 101 ... Communication controller 102 ... Communication network

Claims (7)

[Claims] 1. A first wireless communication means capable of providing a wireless communication service to a mobile terminal, and a higher speed than the first wireless communication means in a geographically narrower range than the first wireless communication means. A mobile communication system comprising: a second wireless communication unit capable of providing a wireless communication service to the mobile terminal; and a request for communication from the mobile terminal and / or a request for communication to the mobile terminal. If the mobile terminal becomes able to use the second wireless communication means within a time,
The mobile terminal communicates using the second wireless communication means, and if the mobile terminal does not become available for use of the second wireless communication means within the predetermined time, the mobile terminal communicates with the first wireless communication means. A mobile communication system for performing communication using the wireless communication means. 2. A first wireless communication means capable of providing a wireless communication service to a mobile terminal, and a higher speed than the first wireless communication means in a geographically narrower range than the first wireless communication means. In a mobile communication system comprising a second wireless communication means capable of providing a wireless communication service to the mobile terminal, when an information amount of information to be communicated by the mobile terminal is larger than a predetermined information amount, After a request for communication from the mobile terminal or a request for communication to the mobile terminal, if the mobile terminal becomes able to use the second wireless communication means within a predetermined time, the mobile terminal The mobile terminal communicates using the second wireless communication unit, and if the mobile terminal does not become available for use in the second wireless communication unit within the predetermined time, the mobile terminal communicates with the first wireless communication unit. For Mobile communication system, characterized by communicating Te. 3. When the amount of information of information to be communicated by the mobile terminal is not larger than a predetermined amount of information, immediately after a request for communication from the mobile terminal or a request for communication to the mobile terminal, The mobile communication system according to claim 2, wherein the mobile terminal performs communication using the first wireless communication unit. 4. A first wireless communication means capable of providing a wireless communication service to a mobile terminal, and a higher speed than the first wireless communication means in a geographically narrower range than the first wireless communication means. A mobile communication system comprising: a second wireless communication means capable of providing the mobile terminal with a mobile communication terminal; and a mobile terminal after the mobile terminal requests a communication or a communication to the mobile terminal. Waits for a predetermined time until the mobile terminal can use the second wireless communication means when the estimated time until the second wireless communication means can be used is smaller than a predetermined time. A mobile communication system wherein a communication service is provided to a mobile terminal using the first wireless communication means when the predetermined time has elapsed. 5. A communication request from the mobile terminal or a request from the mobile terminal to the mobile terminal when a predicted time required for the mobile terminal to use the second wireless means is not shorter than a predetermined time. The mobile communication system according to claim 4, wherein the mobile terminal performs communication using the first wireless communication means immediately after the request for communication. 6. A first wireless communication means capable of providing a wireless communication service to a mobile terminal, and a higher speed than said first wireless communication means in a geographically narrower range than said first wireless communication means. A wireless communication method for use in a mobile communication system comprising a second wireless communication means capable of providing a wireless communication service to the mobile terminal, wherein a request for communication from the mobile terminal and / or After a request for communication, the mobile terminal
A first step of detecting whether or not the second wireless communication means can be used; and, if the mobile terminal determines in the first step that the second wireless communication means can be used, the communication is performed. A second step of using the second wireless communication means for communication with the terminal, and if the mobile terminal determines that the second wireless communication means cannot be used by the first step, A third step of using the first wireless communication means for communication with a mobile terminal. 7. A first wireless communication unit capable of providing a wireless communication service to a mobile terminal, and a higher speed than the first wireless communication unit in a geographically narrower range than the first wireless communication unit. A wireless communication method for use in a mobile communication system including second wireless communication means capable of providing a wireless communication service to the mobile terminal, wherein the amount of information to be communicated by the mobile terminal is predetermined. A first step of detecting whether the information is larger than the information amount, and after a request for communication from the mobile terminal and / or a request for communication to the mobile terminal, the mobile terminal
A second step of detecting whether or not the second wireless communication means can be used; and the first step, wherein the information amount is determined to be larger than the predetermined information amount, and the second step is performed by the second step. If the mobile terminal determines that the second wireless communication means can be used, the third step of using the second wireless communication means for communication with the communication terminal; and the first step Thus, if the information amount is determined to be greater than the predetermined information amount, and if the mobile terminal determines in the second step that the second communication means is not available, No.
And a fourth step of utilizing the wireless communication means.