JP2000209634A - Mobile communication system, and exchange control station and mobile radio communication terminal used for the mobile communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain emergency communication in which a mobile radio communication terminal in a congestion cell takes part and to prevent waste of a radio resource by effectively utilizing the remaining radio communication band in a cell with a high utilizing efficiency of a radio communication band. SOLUTION: A terminal class is set to each of mobile radio communication terminals. An exchange control station 3 uses a terminal class discrimination section 34 to discriminate a terminal class of a mobile radio communication that takes part in a call whose incidence is requested. A radio band management section 35 discriminates an idle band rate in a radio base station 1 in which the mobile radio communication terminal taking part in the call is contained. A call connection discrimination section 36 discriminates propriety of call incidence as to each of mobile radio communication terminals taking part in the call on the basis of the terminal class and the idle band rate. A call processing section 33 does not raise the call when a mobile radio communication terminal whose call incidence is disabled is included.

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 in which a plurality of radio base stations are distributed and arranged to form a plurality of cells, and a mobile radio communication terminal accommodated in the cell enables communication. The present invention relates to an exchange control station and a mobile radio communication terminal used in the mobile communication system.

[0002]

2. Description of the Related Art In a conventional mobile communication system, when a call generation request is made, a radio communication band in one of cells accommodating mobile radio communication terminals participating in the call is not vacant to a certain extent. If so, the request was denied.

[0005] Here, rejection of such a call origination request is generally performed in a state where a certain margin is expected and a certain amount of free wireless communication band is left.

[0004] For this reason, even though there is actually a usable wireless communication band, a call generation request for an important use such as a telephone call for a lifeline use is uniformly rejected. Therefore, there is a problem that the mobile radio communication terminal cannot be used for emergency communication.

[0005] In addition, since the radio communication band that can be used is not actually used, radio resources are wasted.

[0006]

As described above, conventionally,
Since the request to generate a call in which the mobile radio communication terminal accommodated in the cell where the available radio communication band is less than the predetermined amount participates is uniformly refused, it is impossible to perform urgent communication, There was a problem that radio resources were wasted.

The present invention has been made in view of such circumstances, and an object of the present invention is to make it possible to effectively use the remaining radio communication band in a cell having a high radio communication band usage rate. A mobile communication system that enables mobile radio communication terminals accommodated in a cell where traffic is congested to participate in emergency communication while preventing waste of radio resources. ,
An object is to provide an exchange control station and a mobile radio communication terminal used in the mobile communication system.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a plurality of cells by disposing a plurality of radio base stations in a distributed manner. In a mobile communication system that enables communication by the mobile radio communication terminal by setting a call through the radio base station, the mobile communication terminal joins the requested call in response to a request to generate a call. Vacant radio in a cell in which a predetermined terminal of interest (for example, both or both of the calling mobile radio communication terminal and the called mobile radio communication terminal) of the mobile radio communication terminals to be connected is accommodated A vacant band amount determining unit such as a wireless band managing unit for determining a band amount, a class determining unit such as a terminal class determining unit for determining a terminal class set for the terminal of interest, and the vacant band The availability of the requested call based on the amount of free wireless bandwidth determined by the amount determining means, the terminal class determined by the class determining means, and the amount of wireless bandwidth used in the requested call. For example, a call connection determination unit such as a call connection determination unit is provided.If a call processing unit such as a call processing unit determines that a call can be generated by the call generation determination unit, The requested call is generated, and if it is determined that the call cannot be generated, the request to generate the call is rejected.

[0009] By adopting such means, whether or not to make a call in a situation where the amount of available wireless bandwidth is small is set for a terminal of interest among mobile wireless communication terminals participating in the call. It is determined stepwise according to the terminal class. Therefore, as the amount of free wireless bandwidth is smaller, mobile wireless communication terminals that allow call generation can be narrowed down,
While the occurrence of a call is partially permitted, the probability of occurrence of the call can be reduced with a decrease in the available wireless bandwidth.

[0010] In addition to the above-mentioned invention, the present invention further provides a terminal class storage means such as a terminal class storage unit for storing the terminal class in the mobile radio communication terminal, and the terminal class storage means when the call generation request is issued. Terminal class notification means for notifying the terminal class stored in the terminal class, and wherein the class determination means receives the notification by the terminal class notification means of the terminal of interest and sets the terminal class set for the terminal of interest. Was determined.

[0011] By adopting such means, the determination as to whether or not a call can be generated is made based on the terminal class set on the mobile radio communication terminal side.

Further, according to the present invention, in addition to the above-mentioned invention, a mobile radio communication terminal receives a terminal class change request operation, and the terminal class storage means stored in the terminal class storage means in response to the received change request operation. Terminal class changing means for changing the terminal class.

[0013] By taking such means, the user can arbitrarily change the terminal class.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 is a diagram showing an overall configuration of a mobile communication system according to a first embodiment of the present invention.

As shown in FIG. 1, in the mobile communication system of the present embodiment, a plurality of radio base stations (BS) 1 (1-1,1-
2,... 1-m) are respectively formed in cells A (A-1, A-2,
.. Am) are arranged in a dispersed manner so that adjacent ones slightly overlap.

Each of these radio base stations 1 has its own cell A
Mobile radio communication terminal 2 (2-1, 2-2, ... 2-
Set up a wireless connection with n).

Each wireless base station 1 is connected to an exchange control station 3 via a wired line.

The switching control station 3 executes a call connection process while exchanging a call control message with the mobile radio communication terminal 2 via each radio base station 1.

The switching control station 3 is connected to another network 4
It also performs a call connection process between the communication terminal 5 and the mobile radio communication terminal 2 accommodated in the other network 4.

FIG. 2 is a block diagram showing a specific configuration of a main part of the switching control station 3. As shown in FIG.

As shown in FIG. 1, the switching control station 3 comprises a terminal signal transmitting / receiving section 31, an inter-network signal transmitting / receiving section 32, a call processing section 3,
3, a terminal class determination unit 34, a wireless band management unit 35, and a call connection determination unit 36.

The terminal signal transmitting / receiving unit 31
Receiving terminal signals (including signals inserted by the radio base station 1) given from each mobile radio communication terminal 2 via
This terminal signal is supplied to the call processing unit 33, and a call request signal in the terminal signal is recognized, and the mobile radio communication terminal 2 (hereinafter, referred to as a call source mobile terminal) of the call source and the movement of the call destination are recognized. The identification information (here, the telephone number) of the wireless communication terminal 2 (hereinafter, referred to as a call destination mobile terminal) is determined. Then, the terminal signal transmission / reception unit 31 gives the determined telephone number to the terminal class determination unit 34 and the wireless band management unit 35.

The inter-network signal transmission / reception unit 32 receives an inter-network signal provided from another network 4, supplies the inter-network signal to the call processing unit 33, and recognizes a connection request signal in the inter-network signal. To determine the telephone number of the call destination mobile terminal. Then, the inter-network signal transmission / reception unit 32 gives the determined telephone number to the terminal class determination unit 34 and the wireless band management unit 35.

The call processing unit 33 executes well-known call processing such as generation and termination of a call. Note that the call processing unit 33
When a new call needs to be generated, the call generation is executed or rejected according to the permission or rejection of the call generation notified from the call connection determination unit 36.

The terminal class determining section 34 associates the mobile radio communication terminal 2 with the telephone number of the
The terminal of the mobile radio communication terminal 2 having a telephone number given from the terminal signal transmission / reception unit 31 or the inter-network signal transmission / reception unit 32 has a terminal class table as shown in FIG. The class is determined by referring to the terminal class table. And the terminal class determination unit 34
Notifies the call connection determination unit 36 of the determined terminal class.

The radio band management unit 35 manages the ratio of the free radio band (the free band ratio) in the radio band allocated to each radio base station 1, and the terminal signal transmission / reception unit 3
1 and the call connection determining unit 36 of the free band rate of the wireless base station 1 accommodating the mobile wireless communication terminal 2 having the telephone number given from the inter-network signal transmitting / receiving unit 32.

The call connection judging unit 36 is a terminal class judging unit 3
It is determined based on the terminal class notified from No. 4 and the free band rate notified from the wireless band management unit 35 whether or not to allow call generation. Then, the call connection determination unit 36 notifies the call processing unit 33 of the determined permission / prohibition of the call occurrence.

Next, the operation of the mobile communication system configured as described above will be described.

First, when a call request signal is transmitted from any one of the mobile radio communication terminals 2 (calling mobile terminal) to request a call generation, the call request signal is transmitted to the calling mobile terminal. It is provided to the switching control station 3 via the accommodated radio base station 1.

Then, in the switching control station 3, the call request signal is given to the call processing unit 33 via the terminal signal transmitting / receiving unit 31, and the call processing unit 33 is notified that the call generation request has been made.
Recognized by

At the same time, the terminal signal transmitting / receiving section 31 recognizes the telephone number of the calling mobile terminal from the calling request signal. In addition, it is determined whether the communication terminal of the call destination is the mobile radio communication terminal 2 accommodated in the mobile communication system or the communication terminal 5 accommodated in another network 4. Wireless communication terminal 2 (call destination mobile terminal)
If, the telephone number of the call destination mobile terminal is also recognized. The telephone number recognized in this way is provided to the terminal class determination unit 34 and the wireless band management unit 35.

The terminal class determining section 34 extracts the terminal class indicated in the terminal class table for the given telephone number, and notifies the call connection determining section 36 of the terminal class. That is, for example, if the telephone number of the calling mobile terminal is “1001”, “1” is extracted as the terminal class, and this is set as the terminal class of the calling mobile terminal.
6 is notified. The call destination is the mobile radio communication terminal 2,
If the telephone number is "1004", "4" is extracted as the terminal class, and this is notified to the call connection determination unit 36 as the terminal class of the call destination mobile terminal. In addition,
If the call destination is not the mobile radio communication terminal 2, only the terminal class of the call source mobile terminal is notified to the call connection determination unit 36.

On the other hand, the radio band management unit 35 determines the ratio of the free radio band (the free band ratio) in the radio band allocated to each radio base station 1 based on, for example, the state of occurrence of a call in the call processing unit 33. Managing.

When the telephone number is given from the terminal signal transmitting / receiving unit 31, the wireless band management unit 35 receives the telephone number from the wireless base station 1 accommodating the calling source mobile terminal and the calling destination mobile terminal. Is determined, for example, by acquiring information from a position registration unit (not shown). Then, the wireless band management unit 35 notifies the call connection determination unit 36 of the free band rate of the wireless base station 1 that has determined that the calling mobile terminal and the calling destination mobile terminal are accommodated.

The call connection judging section 36 is a terminal class judging section 3
When the notification of the terminal class is received from the wireless band management unit 35 and the notification of the available band rate from the wireless band management unit 35, for example, based on the determination criteria set as shown in FIG. It is determined whether a call can be generated for the terminal 2.

That is, with respect to the mobile radio communication terminal 2 whose terminal class is "1", a call can be generated only when the free band rate in the radio base station 1 accommodating the mobile radio communication terminal 2 is 30% or more. Is determined. With respect to the mobile radio communication terminal 2 whose terminal class is “2”, it is determined that a call can be generated only when the free band rate in the radio base station 1 in which the mobile radio communication terminal 2 is accommodated is 11% or more. Regarding the mobile radio communication terminal 2 whose terminal class is “3”, it is determined that a call can be generated only when the free band rate in the radio base station 1 in which the mobile radio communication terminal 2 is accommodated is 6% or more. Regarding the mobile radio communication terminal 2 whose terminal class is “4”, it is determined that a call can be generated irrespective of the free band rate in the radio base station 1 in which the mobile radio communication terminal 2 is accommodated.

The call connection determination unit 36 notifies the call processing unit 33 of permission to generate a call only when it is determined that all mobile radio communication terminals 2 participating in the call can generate a call, and participates in the call. If it is determined that at least one of the mobile radio communication terminals 2 does not allow a call to occur, the call processing unit 33 is notified of the prohibition of the call occurrence.

Based on the notification from the call connection judging unit 36, the call processing unit 33 generates a call according to a well-known procedure when the call generation is permitted, and when the call generation is prohibited, the call generation unit 33 generates the call. The processing of rejecting the request is performed by, for example, a known procedure.

On the other hand, when a connection request signal is transmitted from another network 4 to request that any one of the mobile radio communication terminals 2 be a call destination mobile terminal, the call request signal becomes an inter-network signal. It is provided to the call processing unit 33 via the transmission / reception unit 32, and the call processing unit 33 recognizes that a request to generate a call has been made.

At the same time, the telephone number of the called mobile terminal is recognized from the connection request signal by the inter-network signal transmitting / receiving section 32,
It is provided to the terminal class determination unit 34 and the wireless band management unit 35.

The terminal class determining section 34 extracts the terminal class indicated in the terminal class table for the given telephone number, and notifies the call connection determining section 36 of the terminal class.

On the other hand, the radio band management unit 35 determines the radio base station 1 in which the call destination mobile terminal having the given telephone number is accommodated, for example, by acquiring information from a location registration unit (not shown). Then, the wireless band management unit 35 notifies the call connection determination unit 36 of the free band rate of the wireless base station 1 that has determined that the call destination mobile terminal is accommodated.

The call connection judging unit 36 is a terminal class judging unit 3
When the notification of the terminal class is received from the wireless band management unit 35 and the notification of the available band rate from the wireless band management unit 35, for example, the call generation is performed with respect to the call destination mobile terminal based on the criterion set as shown in FIG. It is determined whether or not it is possible.

The call connection judging section 36 judges that the call processing section 3 has been activated only when it is judged that a call can be generated for the call destination mobile terminal.
3 is notified of the call generation permission, and when it is determined that the call destination mobile terminal cannot generate the call, the call processing unit 33 is notified of the prohibition of the call generation.

Based on the notification from the call connection judging unit 36, the call processing unit 33 generates a call according to a well-known procedure, for example, when the call generation is permitted, and when the call generation is prohibited, the call generation is performed. The processing of rejecting the request is performed by, for example, a known procedure.

As described above, according to the present embodiment, the free band rate in the radio base station 1 accommodating the mobile radio communication terminal 2 participating in the call for which the occurrence is requested is determined by the terminal class of the mobile radio communication terminal 2. The call generation request is rejected if it is below the call generation allowable free bandwidth rate set for the. Then, a plurality of (four) terminal classes are prepared, and the call occurrence allowable free bandwidth ratios are different from each other.

Therefore, even if the free band rate is low, the mobile radio communication terminal 2 of the terminal class in which the call generation allowable free band rate is set to be smaller performs communication using the remaining small free band. It is possible to quickly carry out emergency communication and the like. Further, even if the remaining free bandwidth is small, the use of the free bandwidth eliminates waste of wireless resources.

According to the present embodiment, the number of mobile radio communication terminals 2 that permit call generation is reduced by narrowing the terminal classes that permit call generation as the vacant band rate decreases, so that the remaining vacant band remains low. The probability that call generation requests are intensively generated in the state is very low, and it is unlikely that the state will fall into a congestion state.

It is to be noted that what kind of terminal class is set for each mobile radio communication terminal 2 is arbitrary by the operator of the mobile communication system or the like. For example, the highest terminal class (the terminal class in the above example) It is conceivable to set “4”) for the mobile radio communication terminal 2 used for public use, such as a disaster prevention person in charge of an administrative organization. And in this way, for example, a gas accident handling officer must be informed of an emergency accident and rush to the site, and after arriving at the accident site, must request emergency assistance if necessary. In some cases, the highest-level terminal class is set for the mobile wireless communication terminal 2 mounted on the gas accident processing vehicle, so that communication is performed preferentially even if communication traffic around the accident site is congested. And make quick contact possible.

In the setting of the terminal class for the mobile radio communication terminal 2 used by a general user, for example, the higher the terminal class, the higher the basic usage fee can be. In this way, a service commensurate with the cost paid by the user can be provided, and a fair service can be realized. In addition, the number of mobile wireless communication terminals 2 of a high terminal class can be reduced, and operation can be performed to effectively achieve the effects of the present invention.

(Second Embodiment) Subsequently, a second embodiment of the present invention will be described.
An embodiment will be described.

The overall configuration of the mobile communication system according to the present embodiment is the same as the configuration of the mobile communication system according to the first embodiment shown in FIG.

The mobile communication system of the present embodiment differs from the mobile communication system of the first embodiment in the specific configuration of the mobile radio communication terminal 2 and the switching control station 3.

FIG. 5 is a block diagram showing a configuration of a main part of the mobile radio communication terminal 2 in the present embodiment.

As shown in this figure, the mobile radio communication terminal 2
Is a wireless communication unit 21, a signal processing unit 22, an operation unit 23, a terminal class storage unit 24, and a control unit 2.
5

The wireless communication unit 21 has, for example, a wireless transmission / reception unit, a modulation / demodulation unit, or a signal processing unit of, for example, a CDMA system, and performs wireless communication with the wireless base station 1 by, for example, a CDMA system. Various processes for

The signal processing unit 22 has a well-known structure including a voice processing unit such as a PCM code processing unit such as a vocoder and a handset, and a data communication unit such as a data transmission protocol processing unit, a data processing unit and a data display unit. It is of a configuration.

The operation unit 23 includes, for example, a key group and a touch panel, and accepts various instruction inputs to the control unit 25 by the user.

The terminal class storage section 24 stores the terminal class set for the mobile radio communication terminal 2.

The control unit 25 includes the wireless communication unit 2
1 and the signal processing unit 22 are controlled, and control data is exchanged with the radio base station 1 to realize the operation as the mobile radio communication terminal 2.

The control unit 25 is mainly composed of, for example, a microcomputer, and realizes various control means by software processing. The control means of the control unit 25 includes, in addition to the well-known general means in the mobile radio communication terminal, a terminal class updating means 25a and a terminal class notifying means 25b.
Contains.

Here, the terminal class updating means 25a updates the terminal class stored in the terminal class storage unit 24 in accordance with the instruction when the terminal class is changed by a predetermined instruction operation on the operation unit 23. I do.

The terminal class notifying unit 25b transmits a terminal class notification signal indicating the terminal class stored in the terminal class storage unit 24 together with the call request signal when a call generation request is made.

FIG. 6 is a block diagram showing a main configuration of the switching control station in the present embodiment. The same parts as those in FIG. 2 are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in this figure, the switching control station 3 comprises a call processing section 33, a call connection determination section 36, a terminal signal transmission / reception section 37,
It has an inter-network signal transmission / reception unit 38, a terminal class notification recognition unit 39, and a wireless band management unit 40.

The terminal signal transmitting / receiving section 37 is connected to each radio base station 1
Receiving terminal signals (including signals inserted by the radio base station 1) given from each mobile radio communication terminal 2 via
This terminal signal is provided to the call processing unit 33, and the call request signal in the terminal signal is recognized to determine the telephone number of the calling mobile terminal. Then, the terminal signal transmitting / receiving unit 37 gives the determined telephone number to the wireless band management unit 40. The terminal signal transmitting / receiving unit 37 extracts a terminal class notification signal from the terminal signals, and supplies the terminal class notification signal to the terminal class notification recognition unit 39.

The inter-network signal transmission / reception section 38 receives an inter-network signal supplied from another network 4 and supplies the inter-network signal to the call processing section 33.

The terminal class notification recognizing section 39 recognizes the terminal class notification signal provided from the terminal signal transmitting / receiving section 37 and determines the terminal class of the calling mobile terminal. Then, the terminal class notification recognition unit 39 notifies the call connection determination unit 36 of the determined terminal class.

The radio band management section 40 manages the ratio of the free radio band (the free band rate) in the radio band allocated to each radio base station 1 and the terminal signal transmitting / receiving section 3
7 notifies the call connection determination unit 36 of the free band rate of the wireless base station 1 in which the mobile wireless communication terminal 2 having the telephone number given from 7 is accommodated.

Next, the operation of the mobile communication system configured as described above will be described.

First, in the mobile radio communication terminal 2, the user can arbitrarily set the terminal class.

That is, when the user wants to change the terminal class, the user uses the operation unit 23 to perform a predetermined instruction operation for designating a terminal class to be newly set.

When such an instruction operation is performed on the operation unit 23, the control unit 25 updates the terminal class stored in the terminal class storage unit 24 in accordance with the instruction content, and thereby the mobile radio communication The terminal class of the terminal 2 is changed.

On the other hand, when the control unit 25 requests a call generation, the wireless communication unit 21 transmits a well-known connection request signal indicating its own telephone number and the telephone number of the call destination. A terminal class notification signal indicating the terminal class stored in the class storage unit 24 is also created, and transmitted from the wireless communication unit 21.

In the switching control station 3, when a call request signal is transmitted from any one of the mobile radio communication terminals 2 (call originating mobile terminal) to request a call generation, the call request signal is transmitted to the switching control station 3. It is given to the switching control station 3 via the radio base station 1 accommodating the calling mobile terminal.

Then, the switching control station 3 sends the call request signal to the call processing unit 33 via the terminal signal transmitting / receiving unit 37, and informs the call processing unit 33 that the call generation request has been made.
Recognized by

At the same time, a terminal class notification signal is extracted by the terminal signal transmission / reception section 37, and the terminal class notification signal is given to the terminal class notification recognition section 39. Further, the terminal signal transmitting / receiving section 37 recognizes the telephone number of the calling mobile terminal from the call request signal, and the recognized telephone number is given to the wireless band management section 40.

The terminal class notification recognizing section 39 recognizes the given terminal class notification signal and determines the terminal class of the calling mobile terminal. And the terminal class notification recognition unit 39
Notifies the call connection determination unit 36 of the determined terminal class.

On the other hand, the radio band management unit 40 determines the ratio of the free radio band (the free band ratio) in the radio band allocated to each radio base station 1 based on, for example, the state of call occurrence in the call processing unit 33. Managing.

When the telephone number is given from the terminal signal transmitting / receiving section 37, the wireless band managing section 40 receives the telephone number from the wireless base station 1 accommodating the calling mobile terminal having the telephone number.
Is determined, for example, by acquiring information from a position registration unit (not shown). Then, the wireless band management unit 40 notifies the call connection determination unit 36 of the free band rate of the wireless base station 1 that has determined that the calling mobile terminal is accommodated.

The call connection determination unit 36 notifies the terminal class notification from the terminal class notification recognition unit 39 and the radio band management unit 40
When the notification of the available bandwidth rate is received from the mobile terminal, whether the call origination is possible or not is determined in the same manner as in the first embodiment based on the determination criterion set as shown in FIG. 4, for example. I do.

The call connection judging section 36 judges that the call processing section 3 has been activated only when it is judged that the call originating mobile terminal can generate a call.
3 is notified of the call generation permission, and when it is determined that the call originating mobile terminal cannot generate a call, the call processing unit 33 is notified of the prohibition of the call generation.

Based on the notification from the call connection judging section 36, the call processing section 33 generates a call according to a well-known procedure, for example, when the call generation is permitted, and when the call generation is prohibited, the call generation section 33 generates the call. The processing of rejecting the request is performed by, for example, a known procedure.

As described above, in the present embodiment, the free band rate in the radio base station 1 accommodating the mobile radio communication terminal 2 requesting the occurrence of a call is set for the terminal class of the mobile radio communication terminal 2. The request for call generation is rejected if it falls below the permitted call generation allowable free bandwidth rate. Then, a plurality of (four) terminal classes are prepared, and the call occurrence allowable free bandwidth ratios are different from each other.

Therefore, even if the free band rate is low, the mobile radio communication terminal 2 of the terminal class in which the call generation allowable free band rate is set to be smaller performs communication using the remaining small free band. It is possible to quickly carry out emergency communication and the like. Further, even if the remaining free bandwidth is small, the use of the free bandwidth eliminates waste of wireless resources.

According to the present embodiment, the number of mobile radio communication terminals 2 that permit call generation is reduced by narrowing the terminal classes that permit call generation as the vacant band rate is lower, so that the remaining vacant band is small. The probability that call generation requests are intensively generated in the state is very low, and it is unlikely that the state will fall into a congestion state.

Further, according to the present embodiment, the terminal class is notified from the mobile radio communication terminal 2 side. Therefore, a terminal class table indicating the terminal class of each mobile radio communication terminal 2 is prepared in the switching control station. You don't have to.

Further, since the terminal class can be arbitrarily set by the user of the mobile radio communication terminal 2, the terminal class can be appropriately changed every time communication is performed.

In this case, for example, the highest-level terminal class (terminal class “4” in the above example) is dedicated to a public use such as a person in charge of disaster prevention at an administrative organization, and general users are It is conceivable that the setting cannot be made. Also, if the communication fee is set higher as the set terminal class is higher, a service commensurate with the cost paid by the user can be provided, and a fair service can be realized. In addition, the frequency of communication in a high terminal class can be reduced, and operation can be performed to effectively achieve the effects of the present invention. The user can flexibly select a communication service for each communication in consideration of a balance between the urgency of the communication and the communication fee.

The present invention is not limited to the above embodiments. For example, in each of the above-described embodiments, it is assumed that the amount of wireless bandwidth used for each call is substantially constant, and in consideration of this, the criterion shown in FIG. The amount of radio band used is taken into account. However, when the amount of wireless bandwidth used for each call is variable, for example, (1) whether or not a call can be generated is set in association with the difference between the amount of free bandwidth and the amount of wireless bandwidth to be used. (2) Even if it is determined that call generation is possible in the procedure of each of the above embodiments, if the difference between the amount of available bandwidth and the amount of wireless bandwidth to be used is equal to or less than a certain value, call generation is disabled. I do. (3) It is determined whether or not a call can be generated based on a data table subdivided according to the amount of wireless band using the terminal class. In this way, whether or not a call can be generated for each terminal class is determined in consideration of the amount of wireless bandwidth to be used.

In each of the above embodiments, the vacancy status of the radio band is determined based on the vacant band rate. However, when the radio band amount allocated to each radio base station 1 is different, the direct vacancy is determined. It is preferable to determine the availability of a wireless band based on the amount of bandwidth.

In each of the above-described embodiments, the determination as to whether or not a call has occurred is performed by the switching control station 3. For example, a station dedicated to determining whether or not a call has occurred may be newly established, or the radio base station 1 may be used. The switching control station 3 may be used to determine whether a call can be generated, for example, by providing a function for determining whether a call has been generated.

In each of the above embodiments, the terminal class has four levels, but the terminal class may have any number of levels as long as there are a plurality of levels.

In each of the above embodiments, only one switching control station 3 is provided. However, the present invention can be applied to a case where a plurality of switching control stations exist.

In the first embodiment, when the calling source and the calling destination are both mobile radio communication terminals 2, it is determined whether or not a call can be generated for both mobile radio communication terminals 2 in consideration of the terminal class. Although the call origination is performed only when it is determined that the call origination is possible for both mobile radio communication terminals 2, the determination of the call origination is made in one of the cases ( This is performed only for the mobile radio communication terminal 2 (for example, on the billing side), and the other mobile radio communication terminal 2
Regarding the above, it is also possible to determine whether or not a call can be generated based on whether or not the available bandwidth amount is below a certain value regardless of the terminal class.

Further, the first embodiment and the second embodiment can be implemented in combination. That is, for example, when the terminal class is notified from the calling mobile terminal, the process is performed as in the second embodiment. When the terminal class is not notified from the calling mobile terminal, the first embodiment is performed. Processing like a form is conceivable.

In addition, various modifications can be made without departing from the spirit of the present invention.

[0099]

According to the present invention, a plurality of radio base stations are distributed and arranged to form a plurality of cells, and calls are made to mobile radio communication terminals accommodated in the cells via the radio base stations. In the mobile communication system that enables communication by the mobile radio communication terminal by setting the above, in response to a request to generate a call, a predetermined one of the mobile radio communication terminals participating in the requested call Free bandwidth determining means for determining a free wireless bandwidth in a cell accommodating a terminal of interest (for example, a mobile radio communication terminal on the calling side and / or a mobile radio communication terminal on the called side) When,
A class determining unit that determines a terminal class set for the terminal of interest, a free wireless band amount determined by the free band amount determining unit, a terminal class determined by the class determining unit, and the requested class. Call origination determination unit for determining whether the requested call can be generated based on the amount of radio bandwidth used in the call, wherein the call processing unit can generate a call by the call generation availability determination unit. If it is determined that the call is generated, the requested call is generated, and if it is determined that the call cannot be generated, the request to generate the call is rejected. As the number is smaller, the mobile radio communication terminals that allow call generation are narrowed down, and while partly permitting call generation, the occurrence probability of call generation is reduced with a decrease in the amount of available wireless bandwidth, As a result, it is possible to effectively use the remaining wireless communication band in a cell having a high usage rate of the wireless communication band, thereby making it possible for mobile wireless communication terminals accommodated in cells where traffic is congested to participate. Communication can be performed, and waste of wireless resources can be prevented.

Further, according to the present invention, in addition to the above-mentioned invention, a terminal class storage means for storing the terminal class in the mobile radio communication terminal, and a terminal class stored in the terminal class storage means at the time of the call generation request are stored. A terminal class notifying unit for notifying, and the class determining unit determines the terminal class set for the terminal of interest by receiving a notification from the terminal class notifying unit of the terminal of interest. The determination as to whether or not a call can be made is made based on the terminal class set on the mobile radio communication terminal side, and it is possible to determine the priority of call generation according to the circumstances of the mobile radio communication terminal side. Become.

Further, according to the present invention, in addition to the above-mentioned invention, the mobile radio communication terminal receives the terminal class change request operation, and the terminal class storage means stored in the terminal class storage means in response to the received change request operation. Is provided, the user can arbitrarily change the terminal class, and the priority of call generation can be changed for each communication.

[Brief description of the drawings]

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

FIG. 2 is a block diagram showing a specific configuration of a main part of the switching control station 3 in FIG. 1;

FIG. 3 is a diagram schematically illustrating an example of a terminal class table.

FIG. 4 is a diagram showing an example of a criterion for determining whether or not a call can be generated based on a terminal class and an available bandwidth ratio.

FIG. 5 is a block diagram showing a configuration of a main part of a mobile wireless communication terminal 2 according to a second embodiment of the present invention.

FIG. 6 is a block diagram showing a main configuration of an exchange control station according to a second embodiment of the present invention.

[Explanation of symbols]

 A (A-1 to Am) ... cell 1 (1-1 to 1-m) ... wireless base station 2 (2-1 to 2-n) ... mobile wireless communication terminal 21 ... wireless communication unit 22 ... signal processing unit 23 ... Operation unit 24 ... Terminal class storage unit 25 ... Control unit 25a ... Terminal class update unit 25b ... Terminal class notification unit 3 ... Exchange control station 4 ... Other networks 5 ... Communication terminals 31,37 ... Terminal signal transmission / reception units 32,38 ... inter-network signal transmission / reception unit 33 ... call processing unit 34 ... terminal class determination unit 35,40 ... wireless band management unit 36 ... call connection determination unit 39 ... terminal class notification recognition unit

Claims (9)

[Claims] A plurality of radio base stations arranged in a distributed manner to form a plurality of cells, and a call is set up to a mobile radio communication terminal accommodated in the cell via the radio base station. In a mobile communication system enabling communication by a mobile radio communication terminal, a predetermined attention terminal among mobile radio communication terminals participating in the requested call is accommodated in response to a request to generate a call. Vacant band amount determining means for determining a vacant wireless band amount in a cell in which the terminal is located, class determining means for determining a terminal class set for the terminal of interest, and vacant wireless band determined by the vacant band amount determining means. Quantity, the terminal class determined by the class determination means,
Call origination availability determining means for determining whether or not the requested call can be generated based on the amount of radio bandwidth used for the requested call; and the call origination availability determination means can generate the call. Call processing means for generating the requested call when it is determined that the call is not possible, and rejecting the call generation request when it is determined that the call cannot be generated. Mobile communication system. 2. The apparatus according to claim 1, wherein the class determination unit determines a terminal class set for the terminal of interest by referring to a database indicating a terminal class for each mobile radio communication terminal. A mobile communication system according to claim 1. 3. The mobile radio communication terminal, comprising: a terminal class storage unit for storing the terminal class; and a terminal class notifying unit for notifying the terminal class stored in the terminal class storage unit when the call generation is requested. 2. The mobile device according to claim 1, wherein the class determination unit determines a terminal class set for the terminal of interest by receiving a notification of the terminal of interest from the terminal class notification unit. 3. Communications system. 4. The mobile communication system according to claim 1, wherein the terminal of interest is a mobile radio communication terminal on the calling side that has requested the call generation. 5. The mobile communication system according to claim 1, wherein the terminal of interest is a called mobile radio communication terminal designated as a destination in the request for call generation. 6. The mobile communication terminal on the calling side that has made the request to generate a call and the mobile wireless communication terminal on the called side specified as a destination in the request to generate a call. The mobile communication system according to claim 1, wherein: 7. A plurality of radio base stations are distributed and arranged to form a plurality of cells, and a call is set to a mobile radio communication terminal accommodated in the cell via the radio base station. In a switching control station for setting up the call in a mobile communication system enabling communication by a mobile radio communication terminal, a mobile radio communication participating in the requested call in response to a call generation request being made. A vacant band amount determining unit that determines a vacant wireless band amount in a cell in which a predetermined target terminal among the terminals is accommodated; a class determining unit that determines a terminal class set for the target terminal; The amount of free wireless bandwidth determined by the free bandwidth determination means, the terminal class determined by the class determination means,
Call origination availability determining means for determining whether or not the requested call can be generated based on the amount of radio bandwidth used for the requested call; and the call origination availability determination means can generate the call. Call processing means for generating the requested call when it is determined that the call is not possible, and rejecting the call generation request when it is determined that the call cannot be generated. Exchange control station. 8. A plurality of radio base stations are distributed and arranged to form a plurality of cells, and a call is set up to a mobile radio communication terminal accommodated in the cell via the radio base station. A cell that enables communication by a mobile radio communication terminal and, in response to a call generation request being made, a cell in which a predetermined attention terminal among mobile radio communication terminals participating in the requested call is accommodated. Vacant band amount determining means for deciding a vacant wireless band amount in, a class determining means for deciding a terminal class set for the terminal of interest by receiving a notification from the terminal of interest, and vacant band amount determination The amount of free wireless bandwidth determined by the means, the terminal class determined by the class determination means,
Call origination availability determining means for determining whether or not the requested call can be generated based on the amount of radio bandwidth used for the requested call; and the call origination availability determination means can generate the call. In the mobile communication system comprising a call processing means for generating the requested call when it is determined that the call is not possible, and rejecting the call generation request when it is determined that the call cannot be generated The mobile radio communication terminal used, comprising: a terminal class storage unit that stores the terminal class; and a terminal class notification unit that notifies the terminal class stored in the terminal class storage unit when the call generation is requested. Characteristic mobile radio communication terminal. 9. The mobile radio communication terminal according to claim 1, further comprising: a terminal class change unit configured to receive the terminal class change request operation and change the terminal class stored in the terminal class storage unit in accordance with the received change request operation. The mobile radio communication terminal according to claim 8, comprising: