JP3315296B2 - Mobile communication system - Google Patents

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 such as an automobile telephone system, a portable telephone system, a cordless telephone system, a wireless LAN system, and the like. The present invention relates to a configured mobile communication system.

[0002]

2. Description of the Related Art In recent years, in order to cope with an increase in the number of subscribers in a mobile communication system such as a mobile phone and a mobile phone, a plurality of base stations are arranged in a service area, and the shortest base station capable of repeating a frequency. A method of using the same frequency is used between each other. In this mobile communication system, it is possible to use the radio frequency band more efficiently by reducing the size of the radio zone formed by one base station and shortening the repetitive usable distance of the same frequency. , Can accommodate a greater number of subscribers.

However, when the size of the wireless zone is reduced in this way, the number of handoffs for switching the wireless zone during communication increases due to the movement of the mobile terminal during communication.
At the time of this handoff, there is a problem that a momentary interruption of communication occurs, and as the range of the wireless zone becomes narrower,
There is a problem that the control for the handoff increases.

In order to solve such a problem, a plurality of radio zones are arranged in a service area.
A mobile communication system having a hierarchical wireless zone configuration has been proposed. In such a mobile communication system, a mobile communication system for performing a service will be described with reference to a block diagram of FIG.

[0005] Within a service area, a plurality of first radio zones CS1 to CSn covering a geographically narrow range,
A plurality of second wireless zones CL1 to CLm covering a geographically wider range than the first wireless zone are arranged. Here, the first wireless zones CS1 to CSn are formed by the first wireless base stations BSS1 to BSSn, and the second wireless zones CL1 to CLm are formed by the second wireless base stations BSL1 to BSL.
m. Further, the communication control device 110 in the mobile communication system includes a movement determination device 111 that controls the mobile communication system based on the moving speed of the mobile terminal.
It is comprised including. The mobile communication system provides a communication service to a mobile terminal moving at a high speed in a second wireless zone, and provides a communication service to a mobile terminal moving at a low speed in a first wireless zone. I do. In such a mobile communication system, the number of handoffs can be reduced without significantly deteriorating the use efficiency of the radio frequency band, as compared with a mobile communication system in which the entire service area is covered only by the plurality of first wireless zones. Becomes However, as a mobile communication system for selecting a wireless zone for providing a service to a mobile terminal, only a mobile communication system based on the moving speed of the mobile terminal as described above has been proposed. No mobile communication system that selects a wireless zone that provides service to the mobile terminal based on the following parameters has been proposed.

[0006] On the other hand, with the recent trend toward multimedia and personalization of communication, particularly when transmitting multimedia information, it is necessary to perform transmission in a method suitable for each type of information in consideration of the type of information to be transmitted. There is. However, since the conventional mobile communication system described above does not consider transmission of multimedia information,
It is considered that there are problems that the use efficiency of the wireless channel deteriorates, the control amount of the wireless network increases, and the service quality deteriorates.

[0007]

SUMMARY OF THE INVENTION The present invention solves the problems of the above-described mobile communication system having a hierarchical wireless zone configuration, and reduces the amount of control of the mobile communication system and improves the use efficiency of the radio frequency band. And a mobile communication system suitable for transmission of multimedia information.

[0008]

In order to achieve the above object, a mobile communication system according to the present invention forms a plurality of first wireless zones capable of providing communication services within a service area of a predetermined area. A plurality of first wireless base station functions, and a plurality of first wireless base station functions capable of providing the communication service over a geographically wider area than the first wireless zone and geographically overlapping with the first wireless zone. A second wireless base station function of setting a second wireless zone and providing a communication service to a plurality of mobile terminals movable within the first and second wireless zones; A mobile communication control device that controls a wireless base station function and a wireless communication network that connects the first and second wireless base station functions with a mobile communication control device and other communication devices are reduced. The mobile communication control device, wherein the mobile communication control device sets the first wireless zone based on an information attribute included in information communicated with a mobile terminal and an information ability included in the information. And selecting at least one of the wireless base station functions of the second wireless base station function and the second wireless base station function of setting the second wireless zone, and using the selected wireless base station function. The mobile terminal further includes a selection unit that provides the mobile terminal with the communication service from the network.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the mobile communication system according to the present invention will be described below in detail with reference to the accompanying drawings. Before explaining with reference to the drawings, an outline of an embodiment of the present invention will be described. In a first embodiment of the mobile communication system according to the present invention, the information attribute is an error rate tolerance of information communicated by the mobile terminal, and the first wireless communication is performed based on the error rate tolerance. Selecting at least one of a zone and the second wireless zone to provide a communication service to the mobile terminal via the selected wireless zone.

In a second embodiment of the mobile communication system according to the present invention, the information attribute is an information amount relating to information communicated with the mobile terminal, and the first attribute is based on the information amount. It is characterized in that at least one of a wireless zone and the second wireless zone is selected, and a communication service is provided to the mobile terminal via the selected wireless zone.

As a third embodiment of the mobile communication system according to the present invention, the information ability is a communication speed required for information communicated with the mobile terminal, and based on the communication speed, Selecting at least one of the first wireless zone and the second wireless zone to provide a communication service to the mobile terminal via the selected wireless zone. I have.

[0012] In a fourth embodiment of the mobile communication system according to the present invention, the zone selecting means sets one of the first wireless zone and the second wireless zone to the mobile terminal. And transmitting the information from the mobile terminal to the other one of the first wireless zone and the second wireless zone. Is selected as a wireless zone that provides an uplink channel communication service.

According to the mobile communication system according to the present invention using the above-described means, unlike the conventional mobile communication system in which the communication state is improved only by the moving speed of the mobile terminal, the communication quality is closest to the communication quality. Control to improve communication quality based on information attributes and information abilities that have a strong relationship, so that the mobile A mobile communication system capable of providing a communication service that satisfies the quality required for information communicated using the mobile terminal, compared to a mobile communication system in which a wireless zone that provides a service to the terminal has been selected is constructed. It becomes possible.

[0014] Further, it is possible to reduce the number of handoffs performed by the mobile terminal during communication, and it is possible to reduce the control amount of the mobile communication system.

[0015] Further, it is possible to use the radio channel efficiently, and it is possible to improve the capacity of the mobile terminal of the mobile communication system.

The above is the outline of each embodiment of the present invention. Hereinafter, embodiments of the present invention will be described more specifically with reference to the drawings. FIG. 2 is a block diagram showing a configuration of the mobile communication system according to the first embodiment of the present invention. The mobile communication system according to the first embodiment includes a plurality of first wireless zones CS1 to CSn capable of providing a communication service in a geographically narrow range, and a plurality of first wireless zones CS1 to CSn geographically based on the first wireless zones CS1 to CSn. A plurality of second wireless zones CL1 to CL capable of providing a communication service over a wide range
m, a mobile communication control device 101 for controlling the mobile communication system, first radio base stations BSS1 to BSSn forming the first radio zones CS1 to CSn, and the second radio zones CL1 to CLm. Second radio base stations BSL1 to BSLm to be formed and each radio base station BSS1 to BSSm
SSn, BSL1, BSLm, and mobile communication control device 101
And a mobile communication cable line 102 connecting the two. The wired circuit 102 is provided between the mobile communication control device 101 and the first wireless base stations BSS1 to BSSn, and between the mobile communication control device 101 and the second wireless base station BSL.
1 to BSLm, between the mobile communication control device 101 and a terminal (not shown), and between the first radio base stations BSS1 to BSSn and the second radio base station BSL.
1 to BSLm, first radio base stations BSS1 to BSS
n and a terminal (not shown), a second radio base station BS
It is also provided between L1 to BSLm and a terminal (not shown).

In the first embodiment, two types of wireless zones having different geographical ranges for providing communication services have been described. However, three or more types of different communication ranges may be provided as necessary. A wireless zone to be provided may be set. Reference numeral 103 is a database for providing desired data to a mobile terminal carrier.

As shown in FIG. 1, the mobile communication control device 101 is provided with a communication condition determining means 11 for managing the status of a radio line in each radio zone and the like. Attribute / communication service ability accepting means 12 for accepting an information attribute such as an allowance and an information amount, and a communication service ability such as a communication speed and a communication time, and an attribute or ability accepted by the accepting means 12 and a communication condition judging means 11 Wireless zone selecting means 15 for selecting one of the narrow area wireless zone wireless channel allocating means 17 and the wide area wireless zone wireless channel allocating means 16 based on the information managed by the first wireless base station BSSn.
A narrow-area wireless zone wireless line allocating means 17 for establishing wireless communication in a narrow wireless zone between
And a wide area wireless zone wireless channel allocating unit 16 for establishing wireless communication in a wide wireless zone with the wireless base station BSLn.

The general operation of the mobile communication system having such a configuration will be described with reference to FIG.
The mobile terminal can communicate with a database, a wired terminal, a mobile terminal, and the like, but FIG. 3 shows an example in which the mobile terminal is used as a partner terminal and performs data communication. A wired line provided between the first (and / or second) wireless base station on the mobile terminal side and the other wireless base station, and a communication between the mobile terminal and the first (second) wireless base station. And a wireless line provided between the partner terminal and the partner wireless base station. Hereinafter, the general operation will be described with reference to FIG.

When the BSS2 is closest to the calling mobile terminal as the first wireless base station, the mobile terminal first transmits a call request to the first wireless base station BSS2. BSS2
Transmits the call request to the mobile communication control apparatus 101. When the mobile communication control device 101 receives the call request,
The mobile terminal transmits an information attribute / ability request to the first radio base station BSS2 in order to accept an information attribute (and) included in information to be communicated by the mobile terminal or a communication service ability required by the information. Upon receiving the information attribute / ability request, the first radio base station BSS2 transmits the information attribute / ability request to the mobile terminal.

On the other hand, the mobile communication control device 101 transmits a called party to the called base station closest to the called terminal in order to receive a call to the called mobile terminal. The partner terminal transmits a call response to the partner radio base station to establish the call connection. Upon receiving the paging response, the partner wireless base station transmits the paging response to the mobile communication control device 101.

When the mobile terminal on the calling side receives the information attribute / ability request, the information attribute such as the information property / error rate tolerance and the amount of information possessed by the information to be communicated and the communication attribute such as the communication speed / communication time etc. Service abilities
It transmits to the first wireless base station BSS2 by the ability response. Upon receiving the information attribute / ability response, the first radio base station BSS2 transmits the information attribute / ability response to the mobile communication control device 101.

When BSL1 is closest as the second wireless base station from the calling mobile terminal, the second wireless base station BSL1 is used instead of the first wireless base station BSS2 in the above communication. However, it is also possible to communicate with the mobile terminal and the mobile communication control device.

When the mobile terminal intends to perform communication, the call request is given the above-mentioned information attributes such as information properties, error rate tolerance and information amount, and communication service abilities such as communication speed and communication time. In this case, since the above-described procedure is not performed, the time required for setting the call can be reduced.

The mobile communication control device 101 includes information managed by the communication condition determining means 11 shown in FIG. 1 and information attributes such as information properties, error rate tolerance, information amount, etc., which the mobile terminal responds to, and communication speed. Select a wireless zone to be allocated for communication of the mobile terminal based on communication service ability such as communication time.

If it is determined that it is appropriate to use the first radio zone CS2 for the communication of the mobile terminal, the mobile communication control device 101 sets the first radio base station BS
In step S2, a wireless channel allocation instruction is transmitted to allocate a wireless channel for communication of the mobile terminal, and the first wireless base station BS for communication of the mobile terminal.
The communication resources of the mobile communication wired circuit between S2 and the other radio base station are allocated. The first radio base station BSS2, upon receiving the radio channel assignment instruction, transmits a radio channel assignment response to the mobile terminal, and the first radio base station BSS2
That the first wireless zone CS2 formed by is assigned.

If it is determined that it is appropriate to use the second wireless zone CL1 for the communication of the mobile terminal, the mobile communication control device 101 sets the second wireless base station BS to the second wireless base station BS.
A wireless channel assignment instruction is transmitted to L1 so as to assign a wireless channel for communication of the mobile terminal, and the second wireless base station BS for communication of the mobile terminal.
A communication resource of a mobile communication wired line between L1 and the other party's wireless base station is allocated. The second radio base station BSL1 transmits a radio channel assignment response to the mobile terminal upon receiving the radio channel assignment instruction, and the second radio base station BSL1
Is notified that the second wireless zone CL1 formed by is assigned.

The mobile communication control device 101 similarly transmits a wireless channel assignment instruction so as to assign a wireless channel to a wireless zone used for communication of a partner terminal. Upon receiving the radio channel assignment instruction, the other radio base station transmits a radio channel assignment response to the other terminal,
Notify that the wireless zone formed by the partner wireless base station has been allocated.

When the assignment of the wireless line and the wired line between the calling mobile terminal and the partner terminal is completed by the above-described procedure, the communication between the mobile terminal and the partner terminal is started.

The details of the operation of selectively switching between the wide-area and narrow-area wireless zones, which is the gist of the present invention, will be described in detail with reference to FIG.

Next, as a first embodiment of the mobile communication system configured as described above, the information to be communicated by the mobile terminal is changed to connection-oriented (CO) communication or connectionless (CL) communication. The operation in the case of selecting a wireless zone for providing a service to the mobile terminal based on the above request will be described.

The mobile terminal originates a call, and BSS2 is used as the first wireless base station, and BSS is used as the second wireless base station.
An example of the operation of the mobile communication system when L1 is closest to the mobile terminal will be described with reference to the flowchart of FIG. First, the mobile terminal transmits a call request to the nearest first radio base station BSS2. The BSS 2 transmits the call request to the mobile communication control device 101. Upon receiving the call request, the mobile communication control device 101 reports to the mobile terminal whether the information to be communicated by the mobile terminal requires connection-oriented communication or connectionless communication. In order to make the request, an information property request is transmitted to the first radio base station BSS2. Upon receiving the information property request, the first radio base station BSS2 transmits the information property request to the mobile terminal. Upon receiving the information property request, the mobile terminal transmits a request for connection-oriented communication or connectionless communication of information to be communicated to the first wireless base station BSS2 by an information property response. The first wireless base station BSS
When receiving the information property response, 2 transmits the information property response to the mobile communication control apparatus 101. In the above communication, the second wireless base station BSL1 can communicate with the mobile terminal and the mobile communication control device instead of the first wireless base station BSS2.

When the mobile terminal makes a request for connection-oriented communication based on the information property response, as shown in the flowchart of FIG. A wireless channel allocation instruction is transmitted to BSL1 to allocate a wireless channel for communication of the mobile terminal. Upon receiving the wireless channel assignment instruction, the second wireless base station BSL1 transmits a wireless channel assignment response to the mobile terminal, and the second wireless base station BSL1
Is notified that the second wireless zone CL1 formed by is assigned.

Further, the mobile terminal responds to the information property response by
When a request for connectionless communication is made, as shown in the flowchart of FIG. 5, the mobile communication control apparatus 101 transmits a radio channel assignment instruction to the first radio base station BSS2, and An instruction is given to allocate a communication line for terminal communication. Upon receiving the radio channel assignment instruction, the first radio base station BSS2 transmits a radio channel assignment response to the mobile terminal, and the first radio zone C formed by the first radio base station BSS2.
Notify that S2 has been assigned.

Next, the operation of the mobile communication system when there is an incoming call to the mobile terminal and BSS2 as the first radio base station and BSL1 as the second radio base station is closest to the mobile terminal. Will be described with reference to the flowchart of FIG. First, the calling terminal calling the mobile terminal declares information to be communicated to the mobile communication control device 101 at the time of calling, regarding a request for connection-oriented communication or connectionless communication. The mobile communication control device 101 transmits a call request to the mobile terminal to the first radio base station BSS2 based on the call request from the call terminal. The first wireless base station BSS2
Upon receiving the incoming call request, transmits the incoming call request to the mobile terminal. Upon receiving the call request, the mobile terminal transmits a call response to the first radio base station BSS2. Upon receiving the call response, the first wireless base station BSS2 transmits the call response to the mobile communication control device 101. In the above communication, the second wireless base station BSL1 can communicate with the mobile terminal and the mobile communication control device instead of the first wireless base station BSS2.

When the calling terminal makes a request for connection-oriented communication, as shown in the flowchart of FIG. 6, the mobile communication control device 101 sends the request to the second radio base station BSL1. A wireless channel allocation instruction is transmitted to allocate a wireless channel for communication of the mobile terminal. Upon receiving the radio channel assignment instruction, the second radio base station BSL1 transmits a radio channel assignment response to the mobile terminal, and the second radio zone CL1 formed by the second radio base station BSL1 is assigned. Notify that it was done.

When the calling terminal makes a request for connectionless communication, as shown in the flowchart of FIG. 7, the mobile communication control device 101 sends a radio channel assignment instruction to the first radio base station. It transmits to the station BSS2 and instructs the BSS2 to allocate a communication line for communication of the mobile terminal. Upon receiving the radio channel assignment instruction, the first radio base station BSS2 transmits a radio channel assignment response to the mobile terminal, and the first radio zone CS2 formed by the first radio base station BSS2 is assigned. Notify that it was done.

Next, as the mobile communication system according to the second embodiment of the present invention, a request for connection-oriented communication or connectionless communication of information to be communicated changes while the mobile terminal is communicating. In this case, an operation in the case of selecting a wireless zone for providing a service to the mobile terminal will be described.

First, BSS2 is used as the first wireless base station.
However, as the second wireless base station, BSL1 is closest to the mobile terminal, and the mobile terminal is located in the first wireless zone CS.
An example of the operation of the mobile communication system when the request of the mobile terminal is changed to a request for connection-oriented communication during connectionless communication according to 2 will be described with reference to the flowchart of FIG. I do. First, the mobile terminal transmits an information property change notification to the first radio base station BSS2 currently provided with the service, thereby notifying that the request has changed from connectionless communication to connection-oriented communication. Tell
The first wireless base station BSS2 transmits the information property change notification to the mobile communication control device 101. The mobile communication control device 1
01, upon receiving the information property change notification, transmits a wireless channel disconnection instruction to the first wireless base station BSS2 serving the mobile terminal so as to disconnect a wireless channel for communication of the mobile terminal. Receiving the radio line disconnection instruction
The wireless base station BSS2 transmits a wireless line disconnection response to the mobile terminal, and disconnects the wireless line by the first wireless zone CS2. The operation after the transmission of the wireless circuit disconnection instruction by the mobile communication control device 101 may be performed when the mobile terminal is handed off. Next, the mobile communication control device 101
Is the second wireless base station BSL1 closest to the mobile terminal.
Transmits a wireless channel assignment instruction so as to assign a wireless channel for communication of the mobile terminal. Upon receiving the radio channel assignment instruction, the second radio base station BSL1 transmits a radio channel assignment response to the mobile terminal, and the second radio zone CL1 formed by the second radio base station BSL1 is assigned. Notify that the connection has been made, and switch the wireless line. In this embodiment,
After receiving the information property change notification, mobile communication control apparatus 101 operates in the order of wireless channel disconnection and wireless channel allocation, but it is also possible to operate in the order of wireless channel allocation and wireless channel disconnection. .

Next, BSS2 is used as the first wireless base station.
However, as the second wireless base station, BSL1 is closest to the mobile terminal, and the mobile terminal is located in the second wireless zone CL.
An example of the operation of the mobile communication system when the request of the mobile terminal changes to a request for connectionless communication while performing connection-oriented communication by No. 1 will be described with reference to the flowchart of FIG. I do. First, the mobile terminal transmits an information property change notification to the currently provided second radio base station BSL1, thereby confirming that the request has changed from connection-oriented communication to connectionless communication. Tell
The second radio base station BSL1 transmits the information property change notification to the mobile communication control device 101. The mobile communication control device 1
01, upon receiving the information property change notification, transmits a wireless line disconnection instruction to the second wireless base station BSL1 serving the mobile terminal so as to disconnect the wireless line for communication of the mobile terminal. Then, the second wireless base station BSL1 that has received the wireless line disconnection instruction transmits a wireless line disconnection response to the mobile terminal, and disconnects the wireless line by the second wireless zone CL1. The operation after the transmission of the wireless channel disconnection instruction by the mobile communication control device 101 may be performed when the mobile terminal is handed off. Next, the mobile communication control device 1
01 is the first radio base station BS closest to the mobile terminal
In S2, a wireless channel assignment instruction is transmitted to assign a wireless channel for communication of the mobile terminal. Upon receiving the radio channel assignment instruction, the first radio base station BSS2 transmits a radio channel assignment response to the mobile terminal, and the first radio zone CS2 formed by the first radio base station BSS2 is assigned. Notify that the connection has been made, and switch the wireless line. In this embodiment, after receiving the information property change notification, mobile communication control apparatus 101 operates in the order of wireless channel disconnection and wireless channel assignment. The operation can be performed in the order of line allocation and wireless line disconnection.

Next, BSS2 is used as the first wireless base station.
However, as the second wireless base station, BSL1 is closest to the mobile terminal, and the mobile terminal is located in the first wireless zone CS.
2 is a diagram showing an example of the operation of the mobile communication system when a request for communication changes to a request for connection-oriented communication at a communication partner terminal of the mobile terminal during connectionless communication according to FIG. 16
This will be described with reference to the flowchart of FIG. First, the terminal transmits a change in the request from the connectionless communication to the connection-oriented communication by transmitting an information property change notification to the mobile communication control apparatus 101. Upon receiving the information property change notification, the mobile communication control apparatus 101 receives the first radio base station BSS serving the mobile terminal.
2, the first wireless base station BSS2, which has received the wireless line disconnection instruction, transmits a wireless line disconnection response so as to disconnect the wireless line for communication of the mobile terminal. The signal is transmitted to the mobile terminal, and the wireless line by the first wireless zone CS2 is disconnected. The mobile communication control device 1
The operation after transmission of the wireless line disconnection instruction of 01 may be performed at the time of handoff of the mobile terminal.

Next, the mobile communication control apparatus 101 transmits a wireless channel assignment instruction to the second wireless base station BSL1 closest to the mobile terminal so as to assign a wireless channel for communication of the mobile terminal. . The second radio base station BS
L1 receives the wireless channel assignment instruction, transmits a wireless channel assignment response to the mobile terminal, and transmits a second wireless zone CL1 formed by the second wireless base station BSL1.
Is assigned, and the wireless line is switched. In this embodiment, after receiving the information property change notification, the mobile communication control apparatus 101 disconnects the wireless line,
Although the operation is performed in the order of wireless channel assignment, it is also possible to perform the operation in the order of wireless channel assignment and wireless channel disconnection.

Next, BSS2 is used as the first wireless base station.
However, as the second wireless base station, BSL1 is closest to the mobile terminal, and the mobile terminal is located in the second wireless zone CL.
1 illustrates an example of the operation of the mobile communication system when a communication request changes to a request for connectionless communication at a communication partner terminal of the mobile terminal while performing connection-oriented communication according to FIG. 17 will be described. First, the terminal transmits an information property change notification to the mobile communication control apparatus 101 to notify that the request has changed from connection-oriented communication to connectionless communication. When the mobile communication control apparatus 101 receives the information property change notification, the second radio base station BSL serving the mobile terminal.
1, the second wireless base station BSL1 that has transmitted the wireless line disconnection instruction to disconnect the wireless line for communication of the mobile terminal, The signal is transmitted to the mobile terminal, and the wireless line by the second wireless zone CL1 is disconnected. The mobile communication control device 1
The operation after transmission of the wireless line disconnection instruction of 01 may be performed at the time of handoff of the mobile terminal.

Next, the mobile communication control apparatus 101 transmits a wireless channel assignment instruction to the first wireless base station BSS2 closest to the mobile terminal so as to assign a wireless channel for communication of the mobile terminal. . The first radio base station BS
S2, upon receiving the radio channel assignment instruction, transmits a radio channel assignment response to the mobile terminal, and transmits a first radio zone CS2 formed by the first radio base station BSS2.
Is assigned, and the wireless line is switched. In this embodiment, the mobile communication control device 101
After receiving the information property change notification, the device operates in the order of wireless channel disconnection and wireless channel assignment, but it is also possible to operate in the order of wireless channel assignment and wireless channel disconnection.

By the operation of the mobile communication system as described above, a second wireless zone covering a geographically wider area than the first wireless zone is allocated to a mobile terminal performing connection-oriented communication. , The number of handoffs due to the movement of the mobile terminal is reduced as compared with the case where the first wireless zone is assigned. As a result, the amount of control for handoff is reduced, and the number of instantaneous interruptions during handoff is reduced, so that a higher quality communication service can be provided. In addition, a first wireless zone having a smaller geographical coverage than the second wireless zone is assigned to a mobile terminal that performs connectionless communication. Unlike the oriented communication, the time required for the communication is often short, and the increase in the number of handoffs due to the assignment of the first wireless zone does not cause much problem. In the case of connectionless communication, unlike connection-oriented communication, a communication line is not established continuously, so no communication is performed at the time of handoff, thereby suppressing an increase in the control amount of handoff. It is. This also makes it possible to suppress deterioration of communication quality at the time of handoff even in connectionless communication. Therefore, with the mobile communication system according to this embodiment, it is possible to reduce the amount of handoff control and improve the communication quality when the mobile terminal performs communication.

Next, a mobile communication system according to a third embodiment of the present invention will be described. The basic configuration of the mobile communication system according to the third embodiment of the present invention is the same as the block diagram showing the configuration of the mobile communication system according to the first embodiment shown in FIG.

As a third embodiment of the mobile communication system configured as described above, a case where a radio zone for providing a service to a mobile terminal is selected based on an allowable delay time related to information communicated by the mobile terminal. About the operation of
A description will be given of parts different from the mobile communication system according to the first embodiment.

A mobile terminal originates a call, and BSS2 is used as a first wireless base station, and BSS is used as a second wireless base station.
The operation of the mobile communication system when L1 is closest to the mobile terminal will be described with reference to the flowchart of FIG. The mobile terminal sets the allowable delay time for the information with which the mobile terminal communicates according to the information property response to the first radio base station BSS2.
After that, it is transmitted to the mobile communication control device 101. If the allowable delay time declared by the mobile terminal in response to the information property response is smaller than a set value, the mobile communication control device 101 transmits a wireless link to the second wireless base station BSL1 for communication of the mobile terminal. Is transmitted as a wireless channel assignment instruction. Upon receiving the radio channel assignment instruction, the second radio base station BSL1 transmits a radio channel assignment response to the mobile terminal, and the second radio zone CL1 formed by the second radio base station BSL1 is assigned. Notify that it was done. On the other hand, when the allowable delay time declared by the mobile terminal based on the information property response is larger than the set value, as shown in the flowchart of FIG.
01 transmits a radio channel assignment instruction to the first radio base station BSS2 to assign a radio channel for communication of the mobile terminal. Upon receiving the radio channel assignment instruction, the first radio base station BSS2 transmits a radio channel assignment response to the mobile terminal, and the first radio zone CS2 formed by the first radio base station BSS2 is assigned. Notify that it was done.

Next, the operation of the mobile communication system when a mobile terminal receives a call and BSS2 is the first wireless base station and BSL1 is the second wireless base station is closest to the mobile terminal. Will be described with reference to the flowchart of FIG. First, the calling terminal that has made a call to the mobile terminal declares an allowable delay time relating to information to be communicated to the mobile communication control device 101 at the time of calling. When the allowable delay time declared by the calling terminal is smaller than the set value, the mobile communication control device 101 sends a communication request of the mobile terminal to the second radio base station BSL1. To allocate a wireless channel for transmitting a wireless channel assignment instruction. Upon receiving the radio channel assignment instruction, the second radio base station BSL1 transmits a radio channel assignment response to the mobile terminal, and the second radio base station BSL1
Is notified that the second wireless zone CL1 formed by is assigned. On the other hand, if the allowable delay time declared by the calling terminal is larger than the set value, the mobile communication control device 101 sends the mobile terminal to the first wireless base station BSS2 as shown in the flowchart of FIG. A wireless channel allocation instruction is transmitted to allocate a wireless channel for this communication. Upon receiving the radio channel assignment instruction, the first radio base station BSS2 transmits a radio channel assignment response to the mobile terminal, and the first radio zone CS2 formed by the first radio base station BSS2 is assigned. Notify that it was done.

Next, as a mobile communication system according to a fourth embodiment of the present invention, when an allowable delay time related to information to be communicated changes while the mobile terminal is performing communication, An operation when selecting a wireless zone for providing a service will be described with respect to a portion different from the mobile communication system according to the second embodiment of the present invention.

First, BSS2 is used as the first wireless base station.
However, as the second wireless base station, BSL1 is closest to the mobile terminal, and the mobile terminal is located in the first wireless zone CS.
An example of the operation of the mobile communication system in the case where the allowable delay time of the mobile terminal changes to a smaller value while the mobile terminal 2 is performing communication will be described with reference to the flowchart of FIG. The mobile terminal transmits the changed allowable delay time by transmitting the information property change notification to the first radio base station BSS2 currently provided with the service. The first wireless base station BSS2 transmits the information property change notification to the mobile communication control device 101. Upon receiving the information property change notification, the mobile communication control device 101 compares the allowable delay time with a set value, and when the allowable delay time is smaller than the set value, as shown in FIG. 1 wireless zone CS
The wireless line is switched from the service of the second wireless zone to the service of the second wireless zone CL1. If the permissible delay time is greater than the set value, the switching operation of the wireless line is not performed.

Next, BSS2 is used as the first wireless base station.
However, as the second wireless base station, BSL1 is closest to the mobile terminal, and the mobile terminal is located in the second wireless zone CL.
An example of the operation of the mobile communication system when the allowable delay time of the mobile terminal changes to a larger value while the communication is being performed according to 1 will be described with reference to the flowchart of FIG. The mobile terminal transmits the changed allowable delay time by transmitting the information property change notification to the currently provided second radio base station BSL1. The second radio base station BSL1 transmits the information property change notification to the mobile communication control device 101. Upon receiving the information property change notification, the mobile communication control apparatus 101 compares the allowable delay time with a set value, and when the allowable delay time is larger than the set value, as shown in FIG. 2 wireless zone CL
1 is switched to a service by the first wireless zone CS2. If the permissible delay time is smaller than the set value, the switching operation of the wireless line is not performed.

Next, BSS2 is used as the first wireless base station.
However, as the second wireless base station, BSL1 is closest to the mobile terminal, and the mobile terminal is located in the first wireless zone CS.
FIG. 16 is a flowchart showing an example of the operation of the mobile communication system when the allowable delay time relating to the information to be communicated changes to a smaller value at the communication partner terminal of the mobile terminal during the communication by the mobile terminal 2 This will be described with reference to FIG. The terminal sends an information property change notification to the mobile communication control device 1
01 to notify the changed allowable delay time. Upon receiving the information property change notification, the mobile communication control device 101 compares the allowable delay time with a set value, and when the allowable delay time is smaller than the set value,
As shown in FIG. 16, the wireless line is switched from the service based on the first wireless zone CS2 to the service based on the second wireless zone CL1. If the permissible delay time is greater than the set value, the switching operation of the wireless line is not performed.

Next, as the first wireless base station, BSS2
However, as the second wireless base station, BSL1 is closest to the mobile terminal, and the mobile terminal is located in the second wireless zone CL.
FIG. 17 is a flowchart showing an example of the operation of the mobile communication system when the allowable delay time relating to the information to be communicated changes to a larger value at the communication partner terminal of the mobile terminal during communication by the mobile terminal 1 This will be described with reference to FIG. The terminal sends an information property change notification to the mobile communication control device 1
01 to notify the changed allowable delay time. Upon receiving the information property change notification, the mobile communication control device 101 compares the allowable delay time with a set value, and when the allowable delay time is larger than the set value,
As shown in FIG. 17, the wireless line is switched from the service based on the second wireless zone CL1 to the service based on the first wireless zone CS2. If the permissible delay time is smaller than the set value, the switching operation of the wireless line is not performed.

By the operation of the mobile communication system as described above, the second wireless zone covering a geographically wider range than the first wireless zone is provided for the mobile terminal communicating information having a small allowable delay time. The handoff floor due to the movement of the mobile terminal is reduced as compared with the case where the mobile terminal is allocated and the first wireless zone is allocated. As a result, the frequency of occurrence of delay due to handoff is reduced, and a high-quality communication service can be provided. In addition, a first wireless zone having a smaller geographical coverage than the second wireless zone is assigned to a mobile terminal that communicates information having a large allowable delay time. In this way, for a mobile terminal that can tolerate a delay time at the time of handoff, it is possible to effectively use a radio frequency band by allocating a radio zone having a geographically narrow range as much as possible. . As described above, with the mobile communication system according to the present embodiment, when the mobile terminal performs communication, it is possible to provide a service according to the required quality, and it is possible to effectively use the radio frequency band. It becomes possible.

In the mobile communication systems according to the third and fourth embodiments of the present invention described above, it is also possible to select a radio zone to be allocated to a mobile terminal based on allowable delay dispersion instead of allowable delay time. Yes, it can be realized by an operation similar to the operation described above. Again,
It is possible to provide a service according to the required quality and effectively use the radio frequency band.

Next, a mobile communication system according to a fifth embodiment of the present invention will be described. The basic configuration of the mobile communication system according to the fifth embodiment is the same as the block diagram showing the configuration of the mobile communication system according to the first to fourth embodiments shown in FIG. 1 is used in FIG.

The operation of the mobile communication system having the above configuration according to the fifth embodiment of the present invention will be described. Here, based on the allowable packet loss rate that is an allowable packet loss rate for information communicated by the mobile terminal, the operation in the case of selecting a wireless zone for providing service to the mobile terminal will be described with reference to the above-described first and second operations. Only parts different from the operation of the mobile communication system according to the second embodiment will be described.

A mobile terminal originates a call, and BSS2 is used as a first radio base station, and BSL2 is used as a second radio base station.
The operation of the mobile communication system when 1 is closest to the mobile terminal will be described with reference to the flowchart of FIG. The mobile terminal determines, based on the information property response, an allowable packet loss rate of information with which the mobile terminal communicates, by the first radio base station BS.
After S2, it is transmitted to the mobile communication control device 101. If the allowable packet loss rate declared by the mobile terminal in response to the information property response is smaller than a set value, the mobile communication control apparatus 101 transmits a wireless communication to the second wireless base station BSL1 for communication of the mobile terminal. A wireless line assignment instruction is transmitted to assign a line. Upon receiving the wireless channel assignment instruction, the second wireless base station BSL1 transmits a wireless channel assignment response to the mobile terminal, and
1 is notified that the second wireless zone CL1 formed by No. 1 has been allocated. On the other hand, when the allowable packet loss rate declared by the mobile terminal in response to the information property response is larger than the set value, the mobile commodity control apparatus 101 sets the first radio base station BSS2 as shown in the flowchart of FIG. Then, a wireless channel allocation instruction is transmitted to allocate a wireless channel for communication of the mobile terminal. This first radio base station B
Upon receiving the radio channel assignment instruction, SS2 transmits a radio channel assignment response to the mobile terminal, and the first radio zone C formed by the first radio base station BSS2.
Notify that S2 has been assigned.

Next, the operation of the mobile communication system when a mobile terminal receives a call and BSS2 is the first wireless base station and BSL1 is the second wireless base station is closest to the mobile terminal. Will be described with reference to the flowchart of FIG. First, the calling terminal that has made a call to the mobile terminal reports an allowable packet loss rate relating to information to be communicated to the mobile communication control device 101 at the time of calling. When the allowable packet loss rate declared by the calling terminal is smaller than a set value, the mobile communication control device 101 sends a communication request of the mobile terminal to the second radio base station BSL1. To allocate a wireless channel for the wireless communication. The second radio base station BS
L1 receives the wireless channel assignment instruction, transmits a wireless channel assignment response to the mobile terminal, and transmits a second wireless zone CL1 formed by the second wireless base station BSL1.
Notify that has been assigned. On the other hand, when the allowable packet loss rate declared by the calling terminal is larger than the set value, as shown in the flowchart of FIG.
01 transmits a radio channel assignment instruction to the first radio base station BSS2 to assign a radio channel for communication of the mobile terminal. Upon receiving the radio channel assignment instruction, the first radio base station BSS2 transmits a radio channel assignment response to the mobile terminal, and the first radio zone CS2 formed by the first radio base station BSS2 is assigned. Notify that it was done.

Next, as a mobile communication system according to a sixth embodiment of the present invention, if the allowable packet loss rate for information to be communicated changes while the mobile terminal is performing communication, The operation of selecting a wireless zone for providing a service will be described with respect to a portion different from the mobile communication system according to the second embodiment of the present invention.

First, BSS2 is used as the first wireless base station.
However, as the second wireless base station, BSL1 is closest to the mobile terminal, and the mobile terminal is located in the first wireless zone CS.
An example of the operation of the mobile communication system in the case where the allowable packet loss rate of the mobile terminal changes to a smaller value during the communication by the mobile terminal 2 will be described with reference to the flowchart of FIG. The mobile terminal transmits the changed permissible packet loss rate by transmitting the information property change notification to the first radio base station BSS2 currently provided with the service. The first wireless base station BSS2 transmits the information property change notification to the mobile communication control device 101. Upon receiving the information property change notification, the mobile communication control apparatus 101 compares the allowable packet loss rate with a set value, and when the allowable packet loss rate is smaller than the set value, as shown in FIG. Then, the wireless line is switched from the service provided by the first wireless zone CS2 to the service provided by the second wireless zone CL1. If the permissible packet loss rate is larger than the set value, the switching operation of the wireless line is not performed.

Next, BSS2 is used as the first wireless base station.
However, as the second wireless base station, BSL1 is closest to the mobile terminal, and the mobile terminal is located in the second wireless zone CL.
An example of the operation of the mobile communication system when the allowable packet loss rate of the mobile terminal changes to a larger value while the communication is being performed according to 1 will be described with reference to the flowchart of FIG. The mobile terminal transmits the changed allowable packet loss rate by transmitting the information property change notification to the currently provided second radio base station BSL1. The second radio base station BSL1 transmits the information property change notification to the mobile communication control device 101. Upon receiving the information property change notification, the mobile communication control apparatus 101 compares the allowable packet loss rate with a set value, and when the allowable packet loss rate is larger than the set value, as shown in FIG. Then, the wireless line is switched from the service provided by the second wireless zone CL1 to the service provided by the first wireless zone CS2. If the allowable packet loss rate is smaller than the set value, the switching operation of the wireless line is not performed.

Next, BSS2 is used as the first wireless base station.
However, as the second wireless base station, BSL1 is closest to the mobile terminal, and the mobile terminal is located in the first wireless zone CS.
FIG. 16 shows an example of the operation of the mobile communication system when the allowable packet loss rate relating to the information to be communicated changes to a smaller value at the communication partner terminal of the mobile terminal while the mobile terminal is performing communication according to FIG. This will be described with reference to a flowchart. The terminal transmits the changed allowable packet loss rate by transmitting the information property change notification to the mobile communication control apparatus 101. Upon receiving the information property change notification, the mobile communication control apparatus 101 compares the allowable packet loss rate with a set value. If the allowable packet loss rate is smaller than the set value, as shown in FIG. From the service provided by the first wireless zone CS2 to the second wireless zone C
The wireless line is switched to the service according to L1. If the allowable packet loss rate is larger than the set value, the switching operation of the wireless line is not performed.

Next, BSS2 is used as the first wireless base station.
However, as the second wireless base station, BSL1 is closest to the mobile terminal, and the mobile terminal is located in the second wireless zone CL.
FIG. 17 shows an example of the operation of the mobile communication system when the allowable packet loss rate relating to the information to be communicated changes to a larger value at the communication partner terminal of the mobile terminal while the communication is being performed according to 1. This will be described with reference to a flowchart. The terminal transmits the changed allowable packet loss rate by transmitting the information property change notification to the mobile communication control apparatus 101. Upon receiving the information property change notification, the mobile communication control device 101 compares the allowable packet loss rate with a set value, and when the allowable packet loss rate is larger than the set value, as shown in FIG. First, from the service by the second wireless zone CL1, the first wireless zone C
The wireless line is switched to the service in S2. If the allowable packet loss rate is smaller than the set value, the switching operation of the wireless line is not performed.

By the operation of the mobile communication system as described above, a mobile terminal communicating information having a small allowable packet loss rate is provided with a second wireless zone covering a geographically wider area than the first wireless zone. Is assigned, and the number of handoffs due to the movement of the mobile terminal is reduced as compared with the case where the first wireless zone is assigned. As a result, the frequency of occurrence of packet loss due to handoff is reduced, and high-quality communication services can be provided. In addition, a first wireless zone having a smaller geographical coverage than the second wireless zone is assigned to a mobile terminal that communicates information having a large allowable packet loss rate. in this way,
By allocating a wireless zone having a geographically narrow range as much as possible to a mobile terminal that can tolerate packet loss at the time of handoff, it becomes possible to effectively use a radio frequency band. As described above, by the mobile communication system according to the present embodiment, when the mobile terminal performs communication, providing a service according to the required quality,
Effective use of the radio frequency band becomes possible.

Next, a mobile communication system according to a seventh embodiment of the present invention will be described. The configuration of the mobile communication system according to the seventh embodiment is the same as the block diagram showing the configuration of the mobile communication system according to the first embodiment shown in FIG.

The operation of the mobile communication system according to the seventh embodiment configured as described above will be described. First, a mobile terminal makes a call, and a BS is used as a first wireless base station.
An example of the operation of the mobile communication system when S2 is the second wireless base station and BSL1 is closest to the mobile terminal will be described with reference to the flowchart of FIG. First, the mobile terminal sends a call request to the nearest first radio base station BSS.
Send to 2. The BSS 2 transmits the call request to the mobile communication control device 101. When the mobile communication control device 101 receives the call request, the mobile communication control device 101 sends the information amount request to the first radio base station BSS2 in order to make the mobile terminal declare the total information amount of the information to be communicated with the mobile terminal. Send to When the first wireless base station BSS2 receives the information amount request,
The information amount request is transmitted to the mobile terminal. Upon receiving the information amount request, the mobile terminal transmits the total amount of information to be communicated to the first wireless base station BSS2 by an information amount response. When the first wireless base station BSS2 receives the information amount response,
An information amount response is transmitted to the mobile communication control device 101. In the above communication, the second wireless base station BSL1 can communicate with the mobile terminal and the mobile communication control device instead of the first wireless base station BSS2.

When the total information amount declared by the mobile terminal in response to the information amount response is larger than the set value, the mobile communication control apparatus 101 sets the second radio base station as shown in the flowchart of FIG. A wireless channel assignment instruction is transmitted to BSL1 to assign a wireless channel for communication of the mobile terminal. Upon receiving the radio channel assignment instruction, the second radio base station BSL1 transmits a radio channel assignment response to the mobile terminal, and the second radio zone CL1 formed by the second radio base station BSL1 is assigned. Notify that it was done.

If the total amount of information declared by the mobile terminal in response to the information amount is smaller than the set value, the mobile communication control device 101 issues a wireless channel assignment instruction as shown in the flowchart of FIG. It transmits to the first radio base station BSS2 and instructs the BSS2 to allocate a communication line for communication of the mobile terminal. The first radio base station BS
S2, upon receiving the radio channel assignment instruction, transmits a radio channel assignment response to the mobile terminal, and transmits a first radio zone CS2 formed by the first radio base station BSS2.
Notify that has been assigned.

Next, the operation of the mobile communication system when a mobile terminal receives a call and BSS2 is the first wireless base station and BSL1 is the second wireless base station is closest to the mobile terminal. Will be described with reference to the flowchart of FIG. First, the calling terminal calling the mobile terminal reports the total amount of information to be communicated to the mobile communication control device 101 at the time of calling. The mobile communication control device 101
Transmits an incoming call request to the mobile terminal to the first radio base station BSS2 based on the outgoing call request from the calling terminal. When the first radio base station BSS2 receives the incoming call request,
A call request is transmitted to the mobile terminal. When the mobile terminal receives the call request, the mobile terminal sends a call response to the first radio base station BS.
Send to S2. Upon receiving the call response, the first wireless base station BSS2 transmits the call response to the mobile communication control device 101. In the above communication, instead of the first wireless base station BSS2, the second wireless base station BSL1 is
It is also possible to communicate with the mobile terminal and the mobile communication control device.

If the total information amount declared by the calling terminal is larger than the set value, the mobile communication control device 101 sends the mobile terminal information to the second radio base station BSL1, as shown in the flowchart of FIG. A wireless channel allocation instruction is transmitted to allocate a wireless channel for this communication. The second wireless base station B
When SL1 receives the radio channel assignment instruction, it transmits a radio channel assignment response to the mobile terminal, and the second radio zone CL formed by the second radio base station BSL1.
Notify that 1 has been assigned.

If the total information amount declared by the calling terminal is smaller than the set value, the mobile communication control apparatus 101 sends a radio channel assignment instruction to the first radio base station as shown in the flowchart of FIG. It transmits to the station BSS2 and instructs the BSS2 to allocate a communication line for communication of the mobile terminal. Upon receiving the radio channel assignment instruction, the first radio base station BSS2 transmits a radio channel assignment response to the mobile terminal, and the first radio zone CS2 formed by the first radio base station BSS2 is assigned. Notify that it was done.

With the above-described operation of the mobile communication system, the first mobile terminal having a large total amount of information to be communicated can be used.
A second wireless zone covering a wider geographical area than the second wireless zone is allocated, and for a mobile terminal having a small total amount of information to communicate, the second wireless zone is more geographically covered than the second wireless zone. When the first wireless zone with a smaller width is allocated, and the mobile communication system is viewed as a whole, the number of handoffs due to the movement of the mobile terminal during communication is reduced. As a result, the amount of control for handoff is reduced, and the number of instantaneous interruptions during handoff is reduced, so that a higher quality communication service can be provided.

Next, a mobile communication system according to an eighth embodiment of the present invention will be described. The configuration of the mobile communication system according to the eighth embodiment of the present invention is the same as the block diagram showing the configuration of the mobile communication system shown in FIG. 1, and the eighth configuration in the mobile communication system configured as described above. An operation of the mobile communication system according to the embodiment will be described. First, an operation of the mobile communication system when a mobile terminal originates a call and BSS2 is the first wireless base station and BSL1 is the second wireless base station closest to the mobile terminal is shown in FIG. This will be described with reference to the flowchart of FIG. First, the mobile terminal transmits a call request to the nearest first radio base station BSS2. The BSS 2 transmits the call request to the mobile communication control device 101. When the mobile communication control device 101 receives the call request, the mobile communication control device 101 causes the mobile terminal to declare a communication time for performing communication with the mobile terminal,
A communication time request is transmitted to the first wireless base station BSS2. Upon receiving the communication time request, the first wireless base station BSS2 transmits the communication time request to the mobile terminal. Upon receiving the communication time request, the mobile terminal determines a communication time for performing communication by a first radio base station BSS by a communication time response.
Send to 2. Upon receiving the communication time response, the first wireless base station BSS2 transmits a communication time response to the mobile communication control device 101. In the above communication, the second radio base station BSL is used instead of the first radio base station BSS2.
1 can also communicate with the mobile terminal and the mobile communication controller.

If the communication time reported by the mobile terminal in response to the communication time response is larger than the set value, the mobile communication control device 101 sets the second communication time as shown in the flowchart of FIG.
To the wireless base station BSL1 of the mobile terminal to transmit a wireless channel for communication of the mobile terminal. Upon receiving the radio channel assignment instruction, the second radio base station BSL1 transmits a radio channel assignment response to the mobile terminal, and the second radio zone CL1 formed by the second radio base station BSL1 is assigned. Notify that it was done.

If the communication time reported by the mobile terminal in response to the communication time response is smaller than the set value, the mobile communication control device 101 is set as shown in the flowchart of FIG.
Transmits a radio channel assignment instruction to the first radio base station BSS2.
And instructs the BSS2 to allocate a communication line for communication of the mobile terminal. Upon receiving the radio channel assignment instruction, the first radio base station BSS2 transmits a radio channel assignment response to the mobile terminal, and the first radio zone CS2 formed by the first radio base station BSS2 is assigned. Notify that it was done.

Next, the operation of the mobile communication system when there is an incoming call to the mobile terminal and BSS2 as the first wireless base station and BSL1 as the second wireless base station is closest to the mobile terminal. Will be described with reference to the flowchart of FIG. First, the calling terminal calling the mobile terminal declares a communication time for performing communication to the mobile communication control device 101 at the time of calling. The mobile communication control device 101 transmits a call request to the mobile terminal to the first radio base station BSS2 based on a call request from the call terminal. When receiving the call request, the first radio base station BSS2 transmits the call request to the mobile terminal. Upon receiving the call request, the mobile terminal transmits a call response to the first radio base station BSS2. Upon receiving the call response, the first wireless base station BSS2 transmits the call response to the mobile communication control device 101. In the above communication, the first wireless base station BSS
Instead of 2, the second radio base station BSL1 can communicate with the mobile terminal and the mobile communication control device.

If the communication time declared by the calling terminal is larger than the set value, the mobile communication control device 101 sends the second wireless base station BSL1 to the second wireless base station BSL1, as shown in the flowchart of FIG. A wireless channel allocation instruction is transmitted to allocate a wireless channel for communication. The second wireless base station B
Upon receiving the wireless channel assignment instruction, SL1 transmits a wireless channel assignment response to the mobile terminal, and transmits a second wireless zone CL formed by the second wireless base station BSL1.
Notify that 1 has been assigned.

If the communication time declared by the calling terminal is smaller than the set value, the mobile communication control apparatus 101 issues a radio channel assignment instruction to the first radio base station as shown in the flowchart of FIG. It transmits to BSS2 and instructs BSS2 to allocate a communication line for communication of the mobile terminal. Upon receiving the radio channel assignment instruction, the first radio base station BSS2 transmits a radio channel assignment response to the mobile terminal, and the first radio zone CS2 formed by the first radio base station BSS2 is assigned. Notify that it was done.

With the operation of the mobile communication system as described above, the first communication is performed for a mobile terminal having a long communication time.
A second radio zone covering a geographically wider area than the second radio zone is allocated, and for a mobile terminal having a short communication time, a second radio zone covering a wider geographical area than the second radio zone is allocated. When a narrow first wireless zone is assigned and the mobile communication system is viewed as a whole, the number of handoffs due to the movement of the mobile terminal during communication is reduced. As a result, the amount of control for handoff is reduced, and the number of instantaneous interruptions during handoff is reduced, so that a higher quality communication service can be provided.

Next, a mobile communication system according to a ninth embodiment of the present invention will be described. The configuration of the mobile communication system according to the ninth embodiment is similar to the block diagram showing the configuration of the mobile communication system according to the first embodiment shown in FIG. CSn
Provides a communication service faster than the second wireless zones CL1 to CLn.

An operation of the mobile communication system configured as above according to the second embodiment of the present invention will be described. First, a mobile terminal makes a call, and BSS2 is used as a first wireless base station, and BSL2 is used as a second wireless base station.
An example of the operation of the mobile communication system when 1 is closest to the mobile terminal will be described with reference to the flowchart of FIG. First, the mobile terminal transmits a call request to the nearest first radio base station BSS2. The BSS 2 transmits the call request to the mobile communication control device 101. Upon receiving the call request, the mobile communication control device 101 sends a communication speed request to the first wireless base station BSS2 to cause the mobile terminal to declare a communication speed required for information communicated by the mobile terminal. Send. Upon receiving the communication speed request, the first wireless base station BSS2 transmits the communication speed request to the mobile terminal. Upon receiving the communication speed request, the mobile terminal transmits a communication speed required for information to be communicated to the first wireless base station BSS2 by a communication speed response. The first radio base station BS
S2, upon receiving the communication speed response, transmits the communication speed response to the mobile communication control device 101. In the above communication, the second radio base station BSL1 can communicate with the mobile terminal and the mobile communication control device instead of the first radio base station BSS2.

When the communication speed reported by the mobile terminal in response to the communication speed response is lower than the set value, the mobile communication control device 101 sets the second communication speed as shown in the flowchart of FIG.
To the wireless base station BSL1 of the mobile terminal to transmit a wireless channel for communication of the mobile terminal. Upon receiving the radio channel assignment instruction, the second radio base station BSL1 transmits a radio channel assignment response to the mobile terminal, and the second radio zone CL1 formed by the second radio base station BSL1 is assigned. Notify that it was done.

When the communication speed reported by the mobile terminal in response to the communication speed response is higher than the set value, the mobile communication control device 101 is set as shown in the flowchart of FIG.
Transmits a radio channel assignment instruction to the first radio base station BSS2.
And instructs the BSS2 to allocate a communication line for communication of the mobile terminal. Upon receiving the radio channel assignment instruction, the first radio base station BSS2 transmits a radio channel assignment response to the mobile terminal, and the first radio zone CS2 formed by the first radio base station BSS2 is assigned. Notify that it was done.

Next, the operation of the mobile communication system in the case where a mobile terminal receives a call and BSS2 is the first wireless base station and BSL1 is the second wireless base station is closest to the mobile terminal. Will be described with reference to the flowchart of FIG. First, the calling terminal calling the mobile terminal reports the communication speed required for the information to be communicated to the mobile communication control device 101 at the time of calling. The mobile communication control device 101
Transmits a call request to the mobile terminal to the first radio base station BSS2 based on a call request from the call terminal. When the first radio base station BSS2 receives the incoming call request,
A call request is transmitted to the mobile terminal. When the mobile terminal receives the call request, the mobile terminal sends a call response to the first radio base station BS.
Send to S2. Upon receiving the call response, the first wireless base station BSS2 transmits the call response to the mobile communication control device 101. In the above communication, instead of the first wireless base station BSS2, the second wireless base station BSL1 is
It is also possible to communicate with the mobile terminal and the mobile communication control device.

If the communication speed declared by the calling terminal is lower than the set value, as shown in the flow chart of FIG. 6, the mobile communication control device 101 sends the mobile terminal to the second radio base station BSL1. A wireless channel allocation instruction is transmitted to allocate a wireless channel for this communication. The second wireless base station B
Upon receiving the wireless channel assignment instruction, SL1 transmits a wireless channel assignment response to the mobile terminal, and transmits a second wireless zone CL formed by the second wireless base station BSL1.
Notify that 1 has been assigned.

When the communication speed declared by the calling terminal is higher than the set value, as shown in the flowchart of FIG.
The mobile communication control apparatus 101 transmits a wireless channel assignment instruction to the first wireless base station BSS2, and instructs the BSS2 to assign a communication line for communication of the mobile terminal. Upon receiving the radio channel assignment instruction, the first radio base station BSS2 transmits a radio channel assignment response to the mobile terminal, and the first radio zone CS2 formed by the first radio base station BSS2 is assigned. Notify that it was done.

Next, as a mobile communication system according to a tenth embodiment of the present invention, when a communication speed required for information to be communicated changes while a mobile terminal is communicating, a service is provided to the mobile terminal. The operation when selecting a wireless zone will be described.

First, BSS2 is used as the first wireless base station.
However, as the second wireless base station, BSL1 is closest to the mobile terminal, and the mobile terminal is located in the first wireless zone CS.
An example of the operation of the mobile communication system when the request related to the communication speed of the mobile terminal changes to a lower speed while the communication is being performed according to 2 will be described with reference to the flowchart of FIG. First, the mobile terminal sends a communication speed change notification,
First radio base station BSS currently being served
2, the transmission speed changed to a low speed is transmitted. The first wireless base station BSS2 transmits the communication speed change notification to the mobile communication control device 101. Upon receiving the communication speed change notification, the mobile communication control device 101 first compares the communication speed declared by the communication speed change notification with a set value, and if the communication speed is lower than the set value, the mobile terminal To the first wireless base station BSS2 currently in service to disconnect the wireless line for communication of the mobile terminal, and receives the first wireless base station receiving the wireless line disconnection instruction. The base station BSS2 transmits a wireless channel disconnection response to the mobile terminal, and disconnects the wireless channel by the first wireless zone CS2. The operation after the transmission of the wireless channel disconnection instruction by the mobile communication control device 101 may be performed when the mobile terminal is handed off.

Next, the mobile communication control apparatus 101 transmits a radio channel assignment instruction to the second radio base station BSL1 closest to the mobile terminal so as to allocate a radio channel for communication of the mobile terminal. . The second radio base station BS
L1 receives the wireless channel assignment instruction, transmits a wireless channel assignment response to the mobile terminal, and transmits a second wireless zone CL1 formed by the second wireless base station BSL1.
Is assigned, and the wireless line is switched. In this embodiment, after receiving the communication speed change notification, mobile communication control apparatus 101 operates in the order of wireless line disconnection and wireless line allocation, but in the order of wireless line allocation and wireless line disconnection. It is also possible to perform the operation. When the communication speed declared by the communication speed change notification is higher than the set value, the mobile communication control device 101 does not perform the switching operation of the wireless line.

Next, BSS2 is used as the first wireless base station.
However, as the second wireless base station, BSL1 is closest to the mobile terminal, and the mobile terminal is located in the second wireless zone CL.
An example of the operation of the mobile communication system in the case where the request for the communication speed of the mobile terminal changes faster during the communication according to No. 1 will be described with reference to the flowchart of FIG. First, the mobile terminal sends a communication speed change notification,
The second radio base station BSL currently being served
1 to notify the communication speed that has changed at a high speed. The second wireless base station BSL1 transmits the communication speed change notification to the mobile communication control device 101. Upon receiving the communication speed change notification, the mobile communication control device 101 first compares the communication speed declared by the communication speed change notification with a set value, and when the communication speed is higher than the set value, the mobile terminal To the second wireless base station BSL1 in service to disconnect the wireless line for communication of the mobile terminal, and the second wireless base station receiving the wireless line disconnection instruction The base station BSL1 transmits a wireless line disconnection response to the mobile terminal, and disconnects the wireless line by the second wireless zone CL1. The operation after the transmission of the wireless channel disconnection instruction by the mobile communication control device 101 may be performed when the mobile terminal is handed off.

Next, the mobile communication control apparatus 101 transmits a radio channel assignment instruction to the first radio base station BSS2 closest to the mobile terminal so as to allocate a radio channel for communication of the mobile terminal. . The first radio base station BS
S2, upon receiving the radio channel assignment instruction, transmits a radio channel assignment response to the mobile terminal, and transmits a first radio zone CS2 formed by the first radio base station BSS2.
Is assigned, and the wireless line is switched. In the present embodiment, after receiving the communication speed change notification, the mobile communication control device 101
Although the operation is performed in the order of wireless channel assignment, it is also possible to perform the operation in the order of wireless channel assignment and wireless channel disconnection. When the communication speed declared by the communication speed change notification is lower than the set value, the mobile communication control device 101 does not perform the switching operation of the wireless line.

Next, BSS2 is used as the first wireless base station.
However, as the second wireless base station, BSL1 is closest to the mobile terminal, and the mobile terminal is located in the first wireless zone CS.
FIG. 1 shows an example of the operation of the mobile communication system in the case where the request regarding the communication speed changes to a low speed at the terminal of the communication partner of the mobile terminal while the communication is being carried out according to FIG.
6 will be described. First, the terminal transmits the communication speed changed to a low speed by transmitting a communication speed change notification to the mobile communication control device 101. Upon receiving the communication speed change notification, the mobile communication control device 101 first compares the communication speed declared by the communication speed change notification with a set value, and when the communication speed is lower than the set value, To the first radio base station BSS2 serving the terminal,
To disconnect the wireless line for communication of the mobile terminal,
The first wireless base station BSS2 that has transmitted the wireless line disconnection instruction and received the wireless line disconnection instruction transmits a wireless line disconnection response to the mobile terminal, and disconnects the wireless line by the first wireless zone CS2. The operation after the transmission of the wireless channel disconnection instruction by the mobile communication control device 101 may be performed when the mobile terminal is handed off.

Next, the mobile communication control device 101 transmits a radio channel assignment instruction to the second radio base station BSL1 closest to the mobile terminal so as to allocate a radio channel for communication of the mobile terminal. . The second radio base station BS
L1 receives the wireless channel assignment instruction, transmits a wireless channel assignment response to the mobile terminal, and transmits a second wireless zone CL1 formed by the second wireless base station BSL1.
Is assigned, and the wireless line is switched. In the present embodiment, the mobile communication control device 1
01 operates in the order of wireless line disconnection and wireless line allocation after receiving the communication speed change notification, but it is also possible to operate in the order of wireless line allocation and wireless line disconnection. When the communication speed declared by the communication speed change notification is higher than the set value, the mobile communication control device 101 does not perform the switching operation of the wireless line.

Next, BSS2 is used as the first wireless base station.
BSL1 as the second wireless base station is closest to the mobile terminal, and the mobile terminal is located in the second wireless zone CL1.
An example of the operation of the mobile communication system in the case where the request regarding the communication speed changes at the terminal of the communication partner of the mobile terminal at a higher speed during the communication by the mobile terminal will be described with reference to the flowchart of FIG. . First, the terminal transmits a communication speed change notification by transmitting the communication speed change notification to the mobile communication control device 101. Upon receiving the communication speed change notification, the mobile communication control device 101 first compares the communication speed declared by the communication speed change notification with a set value, and when the communication speed is higher than the set value, Second radio base station BS serving the terminal
A wireless line disconnection instruction is transmitted to L1 so as to disconnect the wireless line for communication of the mobile terminal, and the second wireless base station BSL1 that has received the wireless line disconnection instruction sends a wireless line disconnection response to the wireless terminal. Transmit to the mobile terminal, the second wireless zone CL1
Disconnect the wireless line. The operation after the transmission of the wireless channel disconnection instruction by the mobile communication control apparatus 101 may be performed at the time of handoff of the mobile terminal. Next, the mobile communication control apparatus 101 transmits a wireless channel allocation instruction to the first wireless base station BSS2 closest to the mobile terminal so as to allocate a wireless channel for communication of the mobile terminal. Upon receiving the radio channel assignment instruction, the first radio base station BSS2 transmits a radio channel assignment response to the mobile terminal, and the first radio zone CS2 formed by the first radio base station BSS2 is assigned. Notify that the connection has been made and switch the wireless line. In the present embodiment, the mobile communication control apparatus 101 operates in the order of wireless line disconnection and wireless line allocation after receiving the communication speed change notification, but operates in the order of wireless line allocation and wireless line disconnection. It is also possible to perform When the communication speed declared by the communication speed change notification is lower than the set value, the mobile communication control device 101 does not perform the switching operation of the wireless line.

By the operation of the mobile communication system as described above, a mobile terminal having a low communication speed required for information to be communicated covers a geographically wider range than the first wireless zone and has a low communication speed. For a mobile terminal to which a second wireless zone for providing a service is assigned and a communication speed required for information to be communicated is high, a geographical coverage area is smaller than that of the second wireless zone, and A first wireless zone that provides a communication service is allocated, and a communication service according to the quality required by a terminal that performs communication can be provided.

Next, a mobile communication system according to an eleventh embodiment of the present invention will be described. The configuration of the mobile communication system according to the eleventh embodiment is the same as the block diagram showing the configuration of the mobile communication system according to the first embodiment shown in FIG. The first having such a configuration
An operation of the mobile communication system according to one embodiment will be described. A mobile terminal originates a call and BSS2 is used as a first wireless base station and BSL1 is used as a second wireless base station.
An example of the operation of the mobile communication system when is closest to the mobile communication terminal will be described with reference to the flowchart of FIG.

First, the mobile terminal transmits a call request to the first radio base station BSS2. The BSS 2 transmits the call request to the mobile communication control device 101. When the mobile communication control device 101 receives the call request, the mobile communication control device 101 sends the service declaration request to the mobile terminal in order to declare the moving speed of the mobile terminal and the total amount of information or the communication time of the information to be communicated by the mobile terminal. 1 to the wireless base station BSS2. When the first radio base station BSS2 receives the service declaration request,
Transmitting the service declaration request to the mobile terminal; Upon receiving the service declaration request, the mobile terminal transmits the above-described moving speed, total information amount, or communication time to the first wireless base station BSS2 by a service declaration response. Upon receiving the service declaration response, the first wireless base station BSS2 transmits a service declaration response to the mobile communication control device 101.
In the above procedure, the second radio base station BSL1 can communicate with the mobile terminal and the mobile communication control device instead of the first radio base station BSS2.

Further, when the mobile terminal intends to perform communication, the above-described moving speed, total information amount, or communication time may be added to the call request. In this case, the above-described procedure is not performed. It takes less time to set up a call.

The moving speed is not limited to the case where the mobile terminal detects the speed by itself and declares the moving speed. In addition, the first radio base station BSSn and the second radio base station BSL
m or a method in which the mobile communication control device detects the speed of the mobile terminal. In this case, there is no need for the mobile terminal to have a means for detecting the speed, which is effective for reducing the size and weight of the mobile terminal or reducing the power consumption.

Regarding the moving speed of the mobile terminal and the total information amount or communication time declared by the service declaration response, when the product of the moving speed and the total information amount is larger than a predetermined set value, or If the product of time is greater than a separately set value,
As shown in the flowchart of 0, the mobile communication control apparatus 101 transmits a wireless channel assignment instruction to the second wireless base station BSL1 to assign a wireless link for communication of the mobile terminal. Upon receiving the radio channel assignment instruction, the second radio base station BSL1 transmits a radio channel assignment response to the mobile terminal, and the second radio zone CL1 formed by the second radio base station BSL1 is assigned. Notify that it was done.

Further, regarding the moving speed of the mobile terminal and the total information amount or communication time declared by the service report response, when the product of the moving speed and the total information amount is smaller than a predetermined set value, or If the product of the mobile communication control device 101 and the communication time is smaller than a predetermined value separately set, as shown in the flowchart of FIG.
Transmits a radio channel assignment instruction to the first radio base station BSS2.
And instructs the BSS2 to allocate a communication line for communication of the mobile terminal. Upon receiving the radio channel assignment instruction, the first radio base station BSS2 transmits a radio channel assignment response to the mobile terminal, and the first radio zone C formed by the first radio base station BSS2.
Notify that the first wireless zone CS2 formed by S2 has been allocated.

Next, the operation of the mobile communication system when a mobile terminal receives a call and BSS2 is the first wireless base station and BSL1 is the second wireless base station is closest to the mobile terminal. Will be described with reference to the flowchart of FIG. First, the calling terminal calling the mobile terminal reports the total information amount or communication time of the information to be communicated to the mobile communication control device 101 at the time of calling. The mobile communication control device 101, based on a call request from the calling terminal,
An incoming call request to the mobile terminal is sent to the first radio base station BSS2.
Send to Upon receiving the call request, the first radio base station BSS2 transmits the call request to the mobile terminal. Upon receiving the call request, the mobile terminal transmits a call response to the first radio base station BSS2. First radio base station BSS2
When the mobile communication control device 101 receives the incoming call response,
Send an incoming call response to. In the above procedure, instead of the first radio base station BSS2, the second radio base station BS
L1 can also communicate with the mobile terminal and the mobile communication controller.

At this time, the first radio base station BS
If Sn, the second radio base station BSLm, or the mobile communication control device does not have a method for detecting the speed of the mobile terminal, the mobile terminal detects the speed by itself and reports it by adding it to the incoming call response. .

For the moving speed of the mobile terminal and the total information amount or communication time declared by the service declaration response, when the product of the moving speed and the total information amount is larger than a predetermined set value, or If the product of time is greater than a separately set value,
As shown in the flowchart, the mobile communication control device 101 communicates a radio channel assignment instruction to the second radio base station BSL1 so as to assign a radio channel for communication of the mobile terminal. Upon receiving the radio channel assignment instruction, the second radio base station BSL1 transmits a radio channel assignment response to the mobile terminal, and the second radio zone CL1 formed by the second radio base station BSL1 is assigned. Notify that it was done.

Further, regarding the moving speed of the mobile terminal and the total information amount or communication time declared by the service declaration response, when the product of the moving speed and the total information amount is smaller than a predetermined set value, or When the product of the communication time and the communication time is smaller than a predetermined value set separately,
As shown in the flowchart of FIG. 7, the mobile communication control device 101
Transmits a radio channel assignment instruction to the first radio base station BSS2.
And instructs the BSS2 to allocate a communication line for communication of the mobile terminal. Upon receiving the radio channel assignment instruction, the first radio base station BSS2 transmits a radio channel assignment response to the mobile terminal, and the first radio zone C formed by the first radio base station BSS2.
Notify that S2 has been assigned.

By the operation of the mobile communication system as described above, a mobile terminal that moves during communication is larger than a certain set value covers a geographically wider range than the first wireless zone. For a mobile terminal to which a second wireless zone is assigned and the distance traveled while communication is continued is smaller than a set value, a first terminal having a smaller geographical coverage than the second wireless zone is used. , The number of handoffs due to the movement of the mobile terminal during communication decreases when viewed from the whole mobile communication system. This reduces the amount of control for handoff,
Further, the number of instantaneous interruptions at the time of handoff is reduced, so that a higher quality communication service can be provided.

Next, a mobile communication system according to a twelfth embodiment of the present invention will be described. First of the present invention
The configuration of the mobile communication system according to the second embodiment is shown in FIG.
Is the same as the block diagram showing the configuration of the mobile communication system according to the first embodiment shown in FIG. provide.

In the mobile communication system according to the twelfth embodiment configured as described above, if the mobile terminal moves during communication and the wireless zone where the mobile terminal is located changes, the mobile terminal An operation when selecting a wireless zone for providing a service will be described.

First, BSS2 is used as the first wireless base station.
However, as the second radio base station, BSL1 is closest to the mobile terminal, and the mobile terminal is communicating with the first radio zone CS2 formed by the first radio base station. The mobile terminal is a second radio base station BS
An example of the operation of the mobile communication system when moving to a place in the second wireless zone CL1 formed by L1 but not in any of the first wireless zones will be described with reference to the flowchart of FIG. I do.

First, the mobile terminal is connected to the first radio base station BS.
When it is detected that communication with S2 cannot be performed, another first
Request for wireless channel assignment with the wireless base station. However, the fact that the mobile terminal is not in any of the first wireless zones and cannot be connected to any of the first wireless base stations is known, for example, by a timeout of a response to the wireless channel assignment request. At this time, the mobile terminal transmits a wireless channel reassignment request to the second wireless base station BSL1. B
SL1 transmits the wireless channel reassignment request to mobile communication control apparatus 101. When the mobile communication control device 101 receives the wireless channel reassignment request, the mobile communication control device 101 sends the communication speed request to the second wireless base station BSL1 in order to make the mobile terminal declare the communication speed required for the information communicated by the mobile terminal. Send to Upon receiving the communication speed request, the second radio base station BSL1 transmits the communication speed request to the mobile terminal.
When receiving the communication speed request, the mobile terminal transmits a communication speed required for information to be communicated to the second wireless base station BSL1 by a communication speed response. The second radio base station BSL1
When the communication speed response is received, the communication speed response is transmitted to the mobile communication control device 101. A method may be used in which the communication speed required for the information communicated by the mobile terminal is added to the wireless channel reassignment request and transmitted.

Further, the mobile communication control device transmits a communication speed request to a terminal with which the mobile terminal is communicating, and
A method may be used in which the communication speed required for the information communicated by the terminal is transmitted to the mobile communication control device 101 as a communication speed response.

If the communication speed reported by the mobile terminal in response to the communication speed response is lower than the set value, the mobile communication control device 101 newly establishes the second wireless communication as shown in the flowchart of FIG. A wireless channel allocation instruction is transmitted to the base station BSL1 so as to allocate a wireless channel for communication of the mobile terminal. Upon receiving the radio channel assignment instruction, the second radio base station BSL1 transmits a radio channel assignment response to the mobile terminal, and the second radio zone CL1 formed by the second radio base station BSL1 is assigned. Notify that

If the communication speed reported by the mobile terminal in response to the communication speed response is higher than the set value, the mobile communication control device 101 sets the radio link of that speed as shown in the flowchart of FIG. In order to notify the mobile terminal that it is not possible to allocate
To the wireless base station BSL1. When the second radio base station BSL1 receives the radio line assignment rejection, it transmits this to the mobile terminal. When the mobile communication control device transmits a radio line assignment rejection, an upper limit value of a line speed that can be assigned to the mobile terminal may be explicitly described.

When the mobile terminal receives the line allocation rejection, it recognizes from the communication speed response that communication at the declared speed cannot be performed, and notifies this to the mobile terminal user or the program. The mobile terminal user or the program performs communication at a low communication speed,
It is determined whether to suspend communication or terminate the communication until the communication speed can be increased again, and the result of the determination is input to the mobile terminal.

Further, the mobile communication control device transmits a radio line assignment rejection to the terminal with which the mobile terminal is communicating. The terminal recognizes that communication cannot be performed in the terminal, and notifies the terminal user or the program of this. The terminal user or the program determines whether to perform communication at a low communication speed, suspend communication until the communication speed can be increased again, or terminate the communication. A method of inputting the determination result may be used.

When the communication is terminated, the mobile terminal or the terminal with which the mobile terminal is communicating transmits a call disconnection request to the mobile communication control device 101. For example, when transmitting from a mobile terminal, the mobile terminal transmits a call disconnection request to the second radio base station BSL1, as shown in the flowchart of FIG. The second radio base station BSL1 transmits the call disconnection request to the mobile communication control device 101. Upon receiving the call disconnection request, the mobile communication control device transmits a wireless line disconnection instruction to release wireless and wired communication resources allocated to the mobile terminal, and receives the wireless line disconnection instruction. The second wireless base station BSL1 transmits a wireless line disconnection response to the mobile terminal.

To suspend the communication, the mobile terminal or the terminal with which the mobile terminal is communicating transmits a line hold request to mobile communication control apparatus 101. For example, when transmitting from a mobile terminal, as shown in the flowchart of FIG. 24, the mobile terminal transmits a line hold request to the second radio base station BSL1. The second wireless base station BSL1 transmits the line hold request to the mobile communication control device 101. When the mobile communication control device receives the line hold request, the mobile communication control device retains information and communication resources related to the line setting necessary for restarting the high-speed communication performed by the mobile terminal, and performs other wireless and wired communication. Is released and the line hold permission is transmitted to the second wireless base station BSL1. The second wireless base station BSL1 that has received the line hold permission transmits a line hold response to the mobile terminal.

When performing communication at a low communication speed, the mobile terminal or the terminal with which the mobile terminal is communicating transmits a recall request to mobile communication control device 101. For example, when transmitting from a mobile terminal, as shown in the flow chart of FIG.
A recall request is transmitted to L1. The second radio base station BS
L1 transmits the recall request to the mobile communication control device 101. Upon receiving the re-call request, the mobile communication control device 101 transmits a communication speed request to the second wireless base station BSL1 to cause the mobile terminal to declare a communication speed required for information communicated by the mobile terminal. I do. The second radio base station BS
When receiving the communication speed request, L1 transmits the communication speed request to the mobile terminal. When receiving the communication speed request, the mobile terminal transmits a communication speed required for information to be communicated to the second wireless base station BSL1 by a communication speed response. Upon receiving the communication speed response, the second wireless base station BSL1 transmits the communication speed response to the mobile communication control device 101.

If the communication speed reported by the mobile terminal in response to the communication speed response is lower than the set value, the mobile communication control device 101 newly sets the second wireless communication as shown in the flowchart of FIG. A wireless channel allocation instruction is transmitted to the base station BSL1 so as to allocate a wireless channel for communication of the mobile terminal. Upon receiving the radio channel assignment instruction, the second radio base station BSL1 transmits a radio channel assignment response to the mobile terminal, and the second radio zone CL1 formed by the second radio base station BSL1 is assigned. Notify that

If the communication speed reported by the mobile terminal in response to the communication speed response is higher than the set value, the mobile communication control device 101 again rejects the line assignment via the second radio base station BSL1. Send to mobile terminal.

When requesting the communication speed, the mobile terminal acknowledges the communication at the upper limit of the line speed that can be allocated to the mobile terminal, for example, added to the line allocation rejection notice, or within the speed. It is conceivable to require a communication speed of. Further, a method may be used in which the request relating to the communication speed from the mobile terminal is added to the recall request and transmitted.

Next, the first radio base stations BSS1 to BSS
n in a location other than any of the first wireless zones CS1 to CSn, and as the second wireless base station, BSL1 is closest to the mobile terminal, and the mobile terminal is the second wireless base station. While the mobile terminal is communicating in the second wireless zone CL1 formed by the BSL1, the mobile terminal approaches the first wireless base station BSS2 in the second wireless zone CL1. A first wireless zone C formed by the first wireless base station BSS2
An example of the operation of the mobile communication system when the mobile communication system moves to S2 will be described with reference to the flowchart of FIG.

First, a mobile terminal requesting high-speed communication via the first wireless base station is performing communication in the second wireless zone CL1 formed by the second wireless base station BSL1. , Periodically the first radio base station BSS
1 to try to receive a notification signal from BSSn. When the mobile terminal enters the first wireless zone CS2, it can receive the broadcast signal, thereby knowing that the mobile terminal has entered the first wireless zone CS2.

At this time, the mobile terminal transmits a request for radio channel assignment with the first radio base station CS2 to the second radio base station BSL1. The BSL 1 transmits the wireless channel assignment request to the mobile communication control device 101. When the mobile communication control device 101 receives the wireless channel assignment request,
A communication speed request is transmitted to the second wireless base station BSL1 to cause the mobile terminal to declare a communication speed required for information communicated by the mobile terminal. The second radio base station BSL1
Upon receiving the communication speed request, transmits the communication speed request to the mobile terminal. When receiving the communication speed request, the mobile terminal transmits a communication speed required for information to be communicated to the second wireless base station BSL1 by a communication speed response. Upon receiving the communication speed response, the second wireless base station BSL1 transmits the communication speed response to the mobile communication control device 101.

In the above communication, instead of the second radio base station BSL1, the first radio base station BSS2 can communicate with the mobile terminal and the mobile communication control device.

Further, the mobile communication control device transmits a communication speed request to a terminal with which the mobile terminal is communicating, and
A method may be used in which the communication speed required for the information communicated by the terminal is transmitted to the mobile communication control device 101 as a communication speed response.

When the mobile communication control device 101 receives the communication speed response, it first compares the communication speed declared by the communication speed response with a set value, and when the communication speed is higher than the set value, the mobile communication control device 101 A wireless line disconnection instruction is transmitted to the second wireless base station BSL1 serving the terminal so as to disconnect the wireless line for communication of the mobile terminal, and the second wireless base station BSL1 receives the wireless line disconnection instruction. The wireless base station BSL1 transmits a wireless line disconnection response to the mobile terminal, and disconnects the wireless line by the second wireless zone CL1. The operation after the transmission of the wireless channel disconnection instruction by the mobile communication control device 101 may be performed when the mobile terminal is handed off.

Next, the mobile communication control apparatus 101 transmits a radio channel assignment instruction to the first radio base station BSS2 closest to the mobile terminal so as to allocate a radio channel for communication of the mobile terminal. . The first radio base station BS
S2, upon receiving the radio channel assignment instruction, transmits a radio channel assignment response to the mobile terminal, and transmits a first radio zone CS2 formed by the first radio base station BSS2.
Is assigned, and the wireless line is switched.

In the present embodiment, after receiving the communication speed response, mobile communication control apparatus 101 operates in the order of radio line disconnection and radio line allocation, but in the order of radio line allocation and radio line disconnection. It is also possible to perform the operation.

When the communication speed declared by the communication speed response is lower than the set value, the mobile communication control device 101 does not perform the switching operation of the wireless line.

In the case of a mobile terminal holding a high-speed communication, as shown in the flow chart of FIG.
Attempt to receive broadcast signals from the wireless base stations BSS1 to BSSn. When the mobile terminal enters the first wireless zone CS2, it can receive the broadcast signal, thereby knowing that the mobile terminal has entered the first wireless zone CS2.

At this time, the mobile terminal releases the hold of the high-speed communication and requests the restart of the communication in the first wireless zone CS2.
Send to L1. The BSL 1 transmits the hold release request to the mobile communication control device 101. The mobile communication control device 101
Upon receiving the hold release request, based on the information on the communication speed at which the mobile terminal was communicating, the mobile station establishes a wireless link with the first wireless base station BSS2 closest to the mobile terminal for communication of the mobile terminal. A wireless channel allocation instruction is transmitted to allocate. Upon receiving the wireless channel assignment instruction, the first wireless base station BSS2 transmits a wireless channel assignment response to the mobile terminal, and the first wireless zone CS2 formed by the first wireless base station BSS2 is assigned. Notify that it was done.

In the above communication, instead of the second radio base station BSL1, the first radio base station BSS2 can communicate with the mobile terminal and the mobile communication control device.

Next, a mobile communication system according to a thirteenth embodiment of the present invention will be described. First of the present invention
The configuration of the mobile communication system according to the third embodiment is the same as the block diagram showing the configuration of the mobile communication system according to the first embodiment shown in FIG.
CSn provides a communication service faster than the second wireless zones CL1 to CLm.

In the mobile communication system according to the present embodiment configured as described above, a downlink communication service for transmitting information to a mobile terminal and a radio communication for providing an uplink communication service for transmitting information from the mobile terminal are provided. The operation when each of the zones is selected separately will be described.

First, an example of the operation of the mobile communication system when a mobile terminal originates a call and BSS2 is the first wireless base station and BSL1 is the second wireless base station is closest to the mobile terminal. Will be described with reference to the flowchart of FIG. First, the mobile terminal transmits a call request to the nearest second radio base station BSL1. BSL1 transmits the call request to the mobile communication control device. The mobile communication control device 10
1 receives the call request and transmits a communication speed request to the second radio base station BSL1 to cause the mobile terminal to declare an uplink communication speed and a downlink communication speed required for information communicated by the mobile terminal. I do. Upon receiving the communication speed request, the second radio base station BSL1 transmits the communication speed request to the mobile terminal. When the mobile terminal receives the communication speed request, the mobile terminal transmits the uplink communication speed and the downlink communication speed required for the information to be communicated to the second radio base station B by the communication speed response.
Send to SL1. Upon receiving the communication speed response, the second wireless base station BSL1 transmits the communication speed response to the mobile communication control device 101.

In the above communication, the first radio base station BSS2 can communicate with the mobile terminal and the mobile communication control device instead of the second radio base station BSL1.

If the uplink communication speed declared by the mobile terminal in response to the communication speed response is lower than the set value,
As shown in the flowchart of No. 8, the mobile communication control apparatus 101 transmits an uplink radio channel assignment instruction to the second radio base station BSL1 so as to allocate an uplink radio channel for receiving information from the mobile terminal. . The second wireless base station B
Upon receiving the uplink radio channel assignment instruction, SL1 transmits an uplink radio channel assignment response to the mobile terminal,
That the second wireless zone CL1 formed by the wireless base station BSL1 is assigned.

At this time, the mobile communication control device may instruct the first radio base station BSS2 to transmit an uplink radio channel assignment response.

If the uplink communication speed declared by the mobile terminal in response to the communication speed response is higher than the set value, the mobile communication control device 101 sets the first communication speed as shown in the flowchart of FIG. The radio base station BSS2 transmits an uplink radio channel assignment instruction to allocate an uplink radio channel for receiving information from the mobile terminal. Upon receiving the uplink radio channel assignment instruction, the first radio base station BSS2 transmits an uplink radio channel assignment response to the mobile terminal, and the first radio zone CS2 formed by the first radio base station BSS2. Notify that has been assigned. At this time, when the terminal first transmits a call request, the second
May be instructed to transmit the uplink wireless channel assignment response to the wireless base station BSL1.

On the other hand, if the downlink communication speed reported by the mobile terminal in response to the communication speed response is lower than the set value, the mobile communication control device 101 performs the second communication as shown in the flowchart of FIG. To the base station BSL1 of the mobile terminal, so as to allocate a downlink radio channel for transmitting information to the mobile terminal. Upon receiving the downlink radio channel assignment instruction, the second radio base station BSL1 transmits a downlink radio channel assignment response to the mobile terminal,
It notifies that the second wireless zone CL1 formed by the second wireless base station BSL1 has been allocated.

At this time, a method may be used in which the mobile communication control device instructs the first radio base station BSS2 to transmit a downlink radio channel assignment response.

If the downlink communication speed reported by the mobile terminal based on the communication speed response is higher than the set value, the mobile communication control device 101 sets the first communication speed as shown in the flowchart of FIG. To the wireless base station BSS2 so as to allocate a downlink radio channel for transmitting information to the mobile terminal. Upon receiving the downlink radio channel assignment instruction, the first radio base station BSS2 transmits a downlink radio channel assignment response to the mobile terminal,
It notifies that the first radio zone CS2 formed by the first radio base station BSS2 has been allocated.

At this time, a method may be employed in which the terminal instructs the second radio base station BSL1 to which the call request has been transmitted first to transmit a downlink radio channel assignment response.

Next, there is an incoming call to the mobile terminal, BSS2 as the first wireless base station, and BSL1 as the second wireless base station. An example of the operation will be described.

First, the calling terminal calling the mobile terminal reports the uplink communication speed and the downlink communication speed necessary for the information to be communicated to the mobile communication control device 101 at the time of calling. Then, as shown in the flowchart of FIG.
1 transmits a call request to the mobile terminal to the first radio base station BSS2 based on a call request from the calling terminal. When the first radio base station BSS2 receives the incoming call request,
A call request is transmitted to the mobile terminal. When the mobile terminal receives the call request, the mobile terminal sends a call response to the first radio base station BS.
Send to S2. Upon receiving the call response, the first wireless base station BSS2 transmits the call response to the mobile communication control device 101. In the above communication, instead of the first wireless base station BSS2, the second wireless base station BSL1 is
It is also possible to communicate with the mobile terminal and the mobile communication control device.

When the uplink communication speed declared by the calling terminal is lower than the set value, as shown in the flowchart of FIG.
The mobile communication control device 101 is connected to a second radio base station BSL1.
Then, a downlink radio channel assignment instruction is transmitted so as to allocate a downlink radio channel for transmitting information to the mobile terminal. When the second radio base station BSL1 receives the downlink radio channel assignment instruction, the second radio base station BSL1 transmits a downlink radio channel assignment response to the mobile terminal, and the second radio zone CL1 formed by the second radio base station BSL1. Notify that has been assigned.

At this time, the mobile communication control device may instruct the first radio base station BSS2 to transmit a downlink radio channel assignment response.

When the uplink communication speed declared by the calling terminal is higher than the set value, the mobile communication control device 101 sets the first radio base station BS as shown in the flowchart of FIG.
In S2, a downlink radio channel assignment instruction is transmitted to allocate a downlink radio communication channel for transmitting information to the mobile terminal. Upon receiving the downlink radio channel assignment instruction, the first radio base station BSS2 transmits a downlink radio channel assignment response to the mobile terminal, and the first radio base station BSS2.
That the first wireless zone CS2 formed by is assigned.

At this time, a method may be used in which the mobile communication control device instructs the second radio base station BSL1 to transmit a downlink radio channel assignment response.

On the other hand, when the downlink communication speed declared by the calling terminal is lower than the set value, as shown in the flowchart of FIG. 31, the mobile communication control device 101 transmits the signal to the second radio base station BSL1. And transmits an uplink radio channel assignment instruction to allocate an uplink radio channel for receiving information from the mobile terminal. Upon receiving the uplink radio channel assignment instruction, the second radio base station BSL1 transmits an uplink radio channel assignment response to the mobile terminal, and the second radio base station BS
Notify that the second wireless zone CL1 formed by L1 has been allocated.

At this time, a method may be used in which the mobile communication control device instructs the first radio base station BSS2 to transmit an uplink radio channel assignment response.

When the downlink communication speed declared by the calling terminal is higher than the set value, as shown in the flowchart of FIG. 30, the mobile communication control device 101 sends the first wireless base station BSS2 to the first wireless base station BSS2. And transmits an uplink radio channel assignment instruction to allocate an uplink radio channel for receiving information from the mobile terminal. Upon receiving the uplink radio channel assignment instruction, the first radio base station BSS2 transmits an uplink radio channel assignment response to the mobile terminal, and the first radio base station BSS
Notify that the first wireless zone CS2 formed by S2 has been allocated.

At this time, a method may be used in which the mobile communication control device instructs the second radio base station BSL1 to transmit an uplink radio channel assignment response.

In the embodiments shown in FIGS. 28 to 31, it has been described that the uplink radio line and the downlink radio line use different radio base stations, respectively. Depending on the speed, information communication may be performed using an uplink radio channel and a downlink radio channel in the same radio base station.

In the mobile communication system configured and operated as described above, the information to be communicated by the mobile terminal depends on the communication speed required for the information to be transmitted from the terminal and the communication speed required for the information received by the terminal. Even when the speeds are different, the wireless zone can be assigned according to the communication speed required for each piece of information. For this reason, for example, when trying to perform information communication with a low uplink communication speed and a high downlink communication speed, a wireless communication resource in a first wireless zone capable of performing high-speed transmission for both upper and lower communication is allocated. In addition, unnecessary allocation of wireless communication resources can be eliminated.

[0159]

As described above, according to the mobile communication system of the present invention, the amount of control in a network of a mobile communication system, which increases with the personalization of communication, can be reduced, and higher quality communication can be achieved. There is an effect that a service can be provided.

Further, in the mobile communication system using the mobile communication system of the present invention, it is possible to use the radio frequency band efficiently, and the demand for communication increases with the increase in communication multimedia. This has the effect of enabling communication of information that requires a wider frequency band for communication such as images. At the same time, there is an effect that it is possible to accommodate more users in the mobile communication system.

Further, it is possible to provide communication services of various qualities, and it is possible to cope with diversification of communication services and diversification of user demands due to personalization and multi-media communication. This has the effect.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a communication control device in a mobile communication system according to all embodiments of the present invention.

FIG. 2 is a block diagram showing a schematic configuration of a mobile communication system according to the present invention. It is a figure.

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

FIG. 4 is a flowchart showing an operation of the mobile communication system according to the first, third, and fifth embodiments.

FIG. 5 is a flowchart showing an operation of the mobile communication system according to the first, third, and fifth embodiments.

FIG. 6 shows first, third, fifth, seventh, eighth, ninth, and eleventh
5 is a flowchart showing an operation of the mobile communication system according to the embodiment.

FIG. 7 is a flowchart showing an operation of the mobile communication system according to the third, fifth, seventh, eighth, ninth, and eleventh embodiments.

FIG. 8 is a flowchart showing an operation of the mobile communication system according to the seventh embodiment.

FIG. 9 is a flowchart showing an operation of the mobile communication system according to the seventh embodiment.

FIG. 10 is a flowchart showing an operation of the mobile communication system according to the eighth embodiment.

FIG. 11 is a flowchart showing an operation of the mobile communication system according to the eighth embodiment.

FIG. 12 is a flowchart showing an operation of the mobile communication system according to the ninth embodiment.

FIG. 13 is a flowchart showing an operation of the mobile communication system according to the ninth embodiment.

FIG. 14 is a flowchart showing an operation of the mobile communication system according to the second, fourth, and sixth embodiments.

FIG. 15 is a flowchart showing an operation of the mobile communication system according to the second, fourth, and sixth embodiments.

FIG. 16 is a flowchart showing an operation of the mobile communication system according to the second, fourth, sixth, and tenth embodiments.

FIG. 17 is a flowchart showing an operation of the mobile communication system according to the second, fourth, sixth, and tenth embodiments.

FIG. 18 is a flowchart showing an operation of the mobile communication system according to the tenth embodiment.

FIG. 19 is a flowchart showing an operation of the mobile communication system according to the tenth embodiment.

FIG. 20 is a flowchart showing an operation of the mobile communication system according to the eleventh embodiment.

FIG. 21 is a flowchart showing an operation of the mobile communication system according to the eleventh embodiment.

FIG. 22 is a flowchart showing an operation of the mobile communication system according to the twelfth embodiment.

FIG. 23 is a flowchart showing an operation of the mobile communication system according to the twelfth embodiment.

FIG. 24 is a flowchart showing an operation of the mobile communication system according to the twelfth embodiment.

FIG. 25 is a flowchart showing an operation of the mobile communication system according to the twelfth embodiment.

FIG. 26 is a flowchart showing an operation of the mobile communication system according to the twelfth embodiment.

FIG. 27 is a flowchart showing an operation of the mobile communication system according to the twelfth embodiment.

FIG. 28 is a flowchart showing an operation of the mobile communication system according to the thirteenth embodiment.

FIG. 29 is a flowchart showing an operation of the mobile communication system according to the thirteenth embodiment.

FIG. 30 is a flowchart showing an operation of the mobile communication system according to the thirteenth embodiment.

FIG. 31 is a flowchart showing an operation of the mobile communication system according to the thirteenth embodiment.

FIG. 32 is a block diagram illustrating a configuration of a conventional mobile communication system.

[Explanation of symbols]

 Reference Signs List 101 mobile communication control device 102 mobile communication wired line 111 mobility detection device BSS1 to BSSn first wireless zone BSL1 to BSLm first wireless zone CS1 to CSn first wireless base station CL1 to CLm second wireless base station

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04B ^7/ 24-7/26 H04Q ⁷ /00-7/38

Claims (5)

(57) [Claims] 1. A plurality of first wireless base station functions forming a plurality of first wireless zones capable of providing a communication service within a service area of a predetermined area, and a geographical area smaller than the first wireless zone. Can provide the communication service over a wide area and can set up a plurality of second wireless zones geographically overlapping with the first wireless zone and move within the first and second wireless zones. A second radio base station function for providing communication services to a plurality of mobile terminals, a mobile communication control device for controlling the first and second radio base station functions, and a first and second radio base station function. A mobile communication system comprising at least a base station function and a mobile communication control device and a wireless communication network connecting other communication devices, wherein the mobile communication control device is connected to a mobile terminal. A first radio base station function for setting the first radio zone and a second radio for setting the second radio zone based on an information attribute of the information to be communicated and an information ability of the information. Selecting means for selecting at least one of the base station functions and providing the communication service from the network to the mobile terminal using the selected base station function; A mobile communication system comprising: 2. The information attribute is a tolerance of an error rate of information communicated with the mobile terminal, and based on the tolerance of the error rate, the selection unit is configured to execute the first attribute. The communication service is provided from the network to the mobile terminal by selecting at least one of the radio base station function and the second radio base station function. Item 2. The mobile communication system according to Item 1. 3. The information attribute is an information amount relating to information communicated with the mobile terminal, and based on the information amount, the first radio base station function and the second radio base station function. 2. The mobile communication system according to claim 1, wherein one of the station functions is selected to provide a communication service to the mobile terminal. 4. The information ability is a communication speed required for information communicated with the mobile terminal, and based on the communication speed, the first radio base station function and the second The mobile communication system according to claim 1, wherein one of the wireless base station functions is selected to provide a communication service to the mobile terminal. 5. A radio base station for providing a downlink channel communication service for transmitting information to one of said first radio base station function and said second radio base station function to said mobile terminal. Selected as the station function,
Selecting the other one of the radio base station function and the second radio base station function as a radio base station function for providing an uplink channel communication service for transmitting information from the mobile terminal. The mobile communication system according to claim 1, wherein: