JP2002152850A - Wireless communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wireless communication system that informs a caller about a status of a called party so as to allow the caller to check the possibility of its incoming call to the called party to avoid useless operations thereby improving the operability by solving the problem of the conventional wireless communication system where calls have been wasted due to convenience of called parties resulting in lowering the operability. SOLUTION: In the wireless communication system, a base station 2 transmits and outputs a signal denoting whether or not the station 2 has idle channels to a control station 3, the control station 3 stores the signal as information, when a caller makes a call instruction of a mobile station 1 whose location is covered by the base station 2 to the control station 3, the control station 3 checks the stored information and when the base station 3 has no idle channel and the mobile station cannot receive an incoming call from the caller, the system informs the caller about the cause.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication system such as a portable telephone, and more particularly, when a called party cannot receive a call for any reason, notifies the calling party of the situation of the called party. The present invention relates to a wireless communication system that allows a user to consider whether there is a possibility of receiving a call due to a re-call, eliminates useless operations, and improves usability.

[0002]

2. Description of the Related Art A conventional wireless communication system such as a portable telephone will be described with reference to FIG. FIG. 3 is a configuration block diagram illustrating a general wireless communication system. As shown in FIG. 3, the wireless communication system generally includes a plurality of mobile stations 1, a plurality of base stations 2, a control station 3, and a switching station 4.

[0003] Each component will be described in detail below. Mobile station 1
Communicates wirelessly with any of the base stations 2, and transmits and receives a voice signal for a call and a control signal (control signal). Further, the mobile station 1 periodically transmits and outputs a control signal to the base station 2 for location registration described later.

[0004] The base station 2 communicates wirelessly with the mobile station 1 within its own radio wave reach, and outputs a voice signal and a control signal received from the mobile station 1 to the control station 3. Also, it transmits and outputs a voice signal and a control signal input from the control station 3 to the mobile station 1.

[0005] Further, if the base station 2 does not receive a voice signal and a control signal from the mobile station 1 within a predetermined time even after transmitting and outputting a control signal or the like, it notifies the control station 3 of the fact. (Hereinafter referred to as a “time-out signal”).

[0006] Further, when receiving an input of an instruction to call a specific mobile station 1 from the control station 3, the base station 2 transmits a control signal to the mobile station 1 via a line for outputting the control signal. If there is no vacancy, a signal indicating that there is no vacancy in the line is output to the control station 3.

[0007] The control station 3 periodically receives an input of a control signal from the mobile station 1 via the base station 2 and receives a plurality of mobile stations 1.
Of each base station 2 is within the radio wave coverage of which base station 2, and the specific mobile station 1 associates the base station 2 that last transmitted and received the control signal with the specific mobile station 1. In addition, a so-called location registration process, which is stored and stored as location registration information, is performed, and a control signal indicating that the location registration is completed is transmitted and output to the mobile station 1 via the base station 2. is there. Further, the control station 3 outputs a voice signal and a control signal input from the mobile station 1 via the base station 2 to the exchange 4.

[0008] Further, the control station 3 receives an input of a voice signal and a control signal to be transmitted to the specific mobile station 1 from the exchange 4, and from the stored and stored location registration information, the mobile station 1. And the base station 2 that last transmitted and received the signal,
It outputs a voice signal and a control signal input from the exchange 4 to the base station 2.

Further, the control station 3 receives a timeout signal from the base station 2 and outputs to the switching station 4 as a voice signal that the transmission output of the signal to the mobile station 1 could not be performed. . Such an audio signal may be, for example, an audio signal of a message such as “the other mobile station is out of service area or the power is off”.

[0010] Further, the control station 3 receives an input of a signal indicating that there is no available line from the base station 2, and outputs a voice signal indicating that there is no available line to the switching station 4. It has become. Here, the audio signal indicating that there is no free space on the line is generally a 16 Hz intermittent sound generally known as a “busy sound”.

The exchange 4 establishes a line between two specific mobile stations 1 and exchanges voice signals. The switching center 4 is also connected to a general telephone line network, and upon receiving a call request from a general telephone, establishes a line with a specific mobile station 1 and exchanges voice signals. It is.

Next, the operation of the conventional radio communication system will be described by taking a case where a specific mobile station 1 is called from a general telephone set as an example. First, a call request from a general telephone is input to the exchange 4 via a general telephone line network.

[0013] Then, the switching center 4 establishes the specific mobile station 1.
In order to establish a line with the mobile station 1, the control station 3 outputs a control signal for instructing the mobile station 1 to call. Then, the control station 3
Searches the stored and stored location registration information for the base station 2 that has last transmitted / received a signal to / from the mobile station 1 and outputs the control signal input from the exchange 4 to the base station 2 I do.

Then, the base station 2 transmits a control signal to the mobile station 1 to make a call. Here, when the mobile station 1 is in a range where radio waves of the base station 2 cannot reach, when the power of the mobile station 1 is turned off, or when the battery of the mobile station 1 is exhausted and a call cannot be received. , The mobile station 1 does not transmit any signal to the base station 2.

Then, the base station 2 outputs a time-out signal to the control station 3, and the control station 3 outputs, for example, a voice signal of a message such as "the other mobile station is out of range or the power is off". Is output to the exchange 4.

Then, the exchange 4 outputs the voice signal to the general telephone which has made the call via the general telephone line network,
The person making the call will hear the message "The other mobile station is out of service or is currently turned off."

[0017]

As described above, in the above-mentioned conventional wireless communication system, the situation of the called party cannot be notified to the calling party. For example, when the power of the called party is intentionally turned off. Therefore, although the call cannot be received for the time being, the operation of the useless call is repeated, and there is a problem that the usability is poor.

The present invention has been made in view of the above circumstances, and when a called party cannot receive a call due to some reason, the situation of the called party is notified to the calling party, and the called party is called again by calling again. It is an object of the present invention to provide a wireless communication system capable of examining whether or not the operation is performed and improving usability by eliminating useless operations.

[0019]

According to a first aspect of the present invention, there is provided a radio communication system comprising a mobile station, a base station, and a control station, wherein the base station comprises: A base station that transmits a signal indicating whether there is a vacancy in its own line to the control station.The control station receives an input of a signal indicating whether there is a vacancy in the line from the base station, This signal is stored as information of the base station, and when a mobile station is called via the base station, the information of the base station is checked. It is a control station that transmits the line information indicating that there is no call to the caller, and it is possible to prevent unnecessary recalls,
Usability can be improved.

According to a second aspect of the present invention, there is provided a mobile station for performing wireless communication via a base station and a control station for storing a state of the base station. When an outgoing call is made, the information is transmitted from the control station via the base station if there is no vacancy according to the information on whether or not there is a vacancy in the line at the base station of the called mobile station stored in the control station. It is characterized by receiving and outputting information indicating that there is no vacancy in the line, and can provide detailed information including the state of the line to the caller, thereby improving usability.

[0021]

Embodiments of the present invention will be described with reference to the drawings. In the wireless communication system (the present system) according to the embodiment of the present invention, the mobile station transmits and outputs its own state to the control station, and the control station stores and stores the state of each mobile station. If the called party is unable to receive a call, when the call is placed, the reason is communicated to the caller, and whether or not there is a possibility of receiving the call by re-calling, and the useless operation is performed. Can be eliminated and usability can be improved.

This system is similar to the general wireless communication system shown in FIG.
Is slightly different from the conventional operation.

That is, the mobile station 1 of the present system periodically transmits and outputs a control signal to the control station 3 via the base station 2 for position registration, and also receives the signal strength (electric field) received from the base station 2. The control signal is transmitted to the base station 2 for output.

The mobile station 1 periodically transmits a control signal indicating that the power is turned on to the base station 2 and, when the power is turned off, indicates that the power is turned off. The control signal is transmitted and output to the base station 2. Further, the mobile station 1 periodically transmits and outputs a control signal indicating the remaining battery level to the base station 2.

The control station 3 receives a control signal for location registration received from the mobile station 1 via the base station 2,
It is stored as location registration information as in the conventional case.
Further, the control station 3 receives an input of a control signal indicating the electric field strength and stores it as electric field strength information.

Further, the control station 3 receives a control signal indicating that the power has been turned off or a control signal indicating that the remaining battery level is below a certain value, and supplies power state information and remaining battery level information. Is stored and stored. That is,
The control station 3 stores location registration information, electric field strength information, power supply state information, and battery remaining amount information in association with each mobile station 1. In the claims, the position registration information, the electric field strength information, the power supply state information, and the battery remaining amount information are collectively referred to as “mobile station information”.

Further, when the control station 3 receives the input of the control signal for calling the specific mobile station 1 from the exchange 4, the control station 3 checks the location registration information, the electric field strength information, the power supply state information, and the battery remaining amount information. If the mobile station 1 can receive a call,
Is transmitted and output to the mobile station 1 via the base station 2.

If the call cannot be received, a message such as "The call cannot be made because the other party is turned off" is issued via the exchange 4 as a voice signal indicating the cause of the call failure. This is output to the caller.

More specifically, the control station 3 performs the processing shown in FIG. FIG. 1 is a flowchart illustrating a process related to a call made by the control station 3 of the present system. As shown in FIG. 1, when a control signal for calling a specific mobile station 1 is received, the control station 3 refers to the stored electric field intensity information (S1), and the electric field intensity of the mobile station 1 is referred to. If the information is “out of service area” that does not have sufficient electric field strength (No), a voice signal indicating that the mobile station 1 is out of service area is output to the caller (S2), and the process ends.

In step S1, if the mobile station 1 is in the "service area" (Yes), the control station 3 refers to the stored power state information and determines whether the power of the mobile station 1 is turned on. It is checked (S3). If the power is not turned on (No), a voice signal indicating that the power of the mobile station 1 is turned off is output to the caller (S4), and the processing is performed. finish.

In step S3, if the power is turned on (if Yes), the control station 3 refers to the stored remaining battery level information and determines whether the mobile station 1 has a remaining battery level. It is checked whether or not the battery is sufficient (S5). If the remaining battery power is not sufficient (No), a voice signal is output to the caller indicating that the call cannot be received because the remaining battery power is insufficient. (S6), the process ends.

In step S5, if the remaining battery power is sufficient, the mobile station 1 is referred to by referring to the location registration information.
The base station 2 that can communicate with the base station 2 is specified (S7), and a control signal for calling is output through the base station 2 (S7).
8), the process ends.

Next, the operation of the present system will be described by taking the case where the power of the mobile station 1 is turned off as an example.
It is assumed that the mobile station 1 is in the service area. First, when the power of the mobile station 1 is turned off, a control signal indicating that the power is turned off is transmitted and output to the base station 2, and the base station 2 outputs the control signal to the control station 3.

Then, the control station 3 stores the fact that the mobile station 1 has been turned off as power supply state information. Eventually,
When the control station 3 receives an input of an instruction to call the mobile station 1 from the exchange 4, the control station 3 refers to the electric field strength information and checks whether the mobile station 1 is in the service area.

When the mobile station 1 is in the service area, the mobile station 1 refers to the power status information to check whether or not the power of the mobile station 1 is turned on. Then, since the power of the mobile station 1 is not turned on, the control station 3 transmits an audio signal such as “call cannot be made because the power is not turned on” to the calling party via the exchange 4. I do.

According to the present system, the state of the mobile station that has originated the call is transmitted to the caller, so that there is an effect that useless recall can be prevented and the usability can be improved.

The control station 3 informs the caller of the cause of the failure to receive a call, waits for the input of a control signal for eliminating the cause, and if such a control signal is input, the cause is removed. A voice signal notifying the cancellation may be transmitted to the caller.

In other words, if the power supply state information indicating that the power of the mobile station 1 is turned off is stored, the control station 3 will receive a message such as "The power cannot be turned on, and the call cannot be received." The voice signal is transmitted to the caller via the exchange 4 and the control signal indicating that the power is turned on is input. When the control signal is input, the message "The power is turned on. A voice signal such as "calling" may be transmitted to the calling party via the exchange 4 to continue the calling operation.

The base station 2 outputs to the control station 3 information as to whether or not its own line is empty, and the control station 3 stores and stores the information of the base station. When trying to call the mobile station 1 through the base station, the information of the base station is checked, and if the line of the base station 2 is not empty, a voice signal indicating that the line is congested is called. It is also conceivable to communicate this information to others.

In this case, as shown in FIG. 2, when the remaining battery level of the mobile station 1 is sufficient in the processing S5 of FIG. 1 (Yes), the processing shifts to the processing S7. Before, the base station 2 covering the location of the mobile station 1 (hereinafter, referred to as a base station 2)
A process of checking whether there is a vacancy in the line of the “corresponding base station” may be performed. FIG. 2 is a flow chart illustrating a process of another call of the control station 3 of the present system.

That is, the call processing shown in FIG. 2 is almost the same as the call processing shown in FIG. 1, but the electric field strength indicates the area, and the mobile station 1 is turned on. Yes,
When the battery level of the mobile station is sufficient, the corresponding base station 2
It is checked whether or not there is a free line (S9). If there is a free line (if Yes), the process proceeds to step S7, and if there is no free space (if No), the message "Line is congested. Is transmitted to the calling party via the exchange 4 (S10), and the process is terminated.

FIG. 2 shows a call control (processing S).
After 8), it is checked whether the mobile station 1 is busy (S11), and if it is busy (Yes),
A voice signal indicating that the user is busy, such as "busy", is transmitted to the calling party via the exchange 4 (S12), the processing is terminated, and if it is not busy in the processing S11 ( If No), a process for ending the process is described.

As described above, according to the processing shown in FIG. 2, when the base station 2 has no free space, detailed information including the state of the line is provided to the caller to prevent unnecessary recalls. This has the effect of improving usability.

Further, when the mobile station 1 receives a specific control signal (hereinafter, referred to as a “power control signal”) via the base station 2, the mobile station 1 can turn on its own power so that the control station can be controlled. It is also conceivable that 3 receives an input of a signal from the caller instructing the power to be forcibly turned on, and transmits and outputs the power control signal to the mobile station 1 via the base station 2.

[0045]

According to the first aspect of the present invention, in a wireless communication system including a mobile station, a base station, and a control station, the base station has a signal indicating whether or not its own line is free. Is transmitted to the control station, the control station receives an input of a signal indicating whether there is a vacant line from the base station, stores the signal as information of the base station, and transmits the signal via the base station. When a mobile station is called, the base station checks the information of the base station. If the base station has no available line, the control station transmits line information indicating that there is no available line to the caller. Therefore, it is possible to prevent useless re-calling caused by the absence of a free line, and to improve the usability by eliminating useless operations.

According to the second aspect of the present invention, there is provided a mobile station for performing radio communication via the base station with the control station storing the state of the base station. According to the information as to whether or not there is a vacancy in the line at the base station in the called mobile station, if there is no vacancy, information indicating that there is no vacancy in the line transmitted from the control station via the base station Is received and output, detailed information including the state of the line can be provided to the caller, and there is an effect that unnecessary operation can be eliminated and usability can be improved.

[Brief description of the drawings]

FIG. 1 is a flowchart showing processing relating to a call made by a control station 3 of the present system.

FIG. 2 is a flowchart illustrating another process related to a call from a control station 3 of the present system.

FIG. 3 is a configuration block diagram illustrating a general wireless communication system.

[Explanation of symbols]

1: mobile station, 2: base station, 3: control station, 4: switching station

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5K024 AA71 CC11 DD02 DD03 FF05 GG03 5K051 BB01 CC01 CC07 DD01 DD02 FF04 GG02 HH02 HH16 5K067 AA34 DD23 DD43 DD44 DD51 DD57 EE02 EE10 EE16 EE23 FF03 FF15 JJ19 FF16 FF17 FF16 FF19 FF16 FF16 FF16 FF16 FF16 FF16 FF16 FF16 FF19 FF19 FF19 FF16 FF17 FF19 FF16 FF16 FF17 FF19 FF19 FF16 FF16 FF19 FF16 FF17

Claims (2)

[Claims] 1. A radio communication system comprising a mobile station, a base station, and a control station, wherein the base station transmits a signal indicating whether or not its own line has a free line to the control station. The control station receives an input of a signal indicating whether there is a vacancy in the line from the base station, stores the signal as information of the base station, and allows the mobile station to communicate with the mobile station via the base station. When a call is made, the information of the base station is checked, and if there is no available line on the base station, the control station transmits line information indicating that there is no available line to the caller. A wireless communication system, characterized by: 2. A mobile station that performs wireless communication via a base station with a control station that stores a state of the base station, wherein when the mobile station makes a call, a called side stored in the control station If there is no vacancy according to the information as to whether or not there is a vacancy in the line at the base station in the mobile station, information indicating that there is no vacancy in the line transmitted from the control station via the base station is received and output. A mobile station, characterized in that: