JPH04301954A - Mobile radio communication system - Google Patents

Abstract

PURPOSE:To effectively utilize a radio speaking channel by preventing a useless call from being originated to a mobile station in the state of disabling an incoming call response. CONSTITUTION:Transfer mode information is transmitted from the mobile station to a base station and stored in a storage circuit 3 at the base station. When an incoming call is originated from a line wire telephone network exchange EX to the mobile station, it is judged at the base station whether a transfer mode is designated concerning this mobile station or not and when the transfer mode is designated, the mobile station is not called but the transfer destination is called.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile radio communication system such as a portable/automobile radio telephone system or a local radio telephone system.

0002

2. Description of the Related Art In recent years, as a mobile radio communication system, a system using a second dial method for calling a mobile station from a wired telephone network has been considered. Figure 5
1 is a schematic configuration diagram showing an example of this type of system.

In the figure, EX is an exchange of a wired telephone network, and a base station BS is connected to this exchange EX via a plurality of wired lines CL1 to CLn assigned representative numbers. Furthermore, a plurality of mobile stations PS1 to PSm are connected to this base station BS via wireless lines.

In such a configuration, assume that a call is made to, for example, the mobile station PS1 from a terminal connected to a wired telephone network (not shown). Then, the exchange EX will be
A vacant line, for example CL1, is captured from among the plurality of subscriber lines CL1 to CLn to which representative numbers are assigned according to the dial signal arriving from the calling terminal, and the base station BS is connected to the base station BS via this line CL1. A ringing signal (calling signal) is sent to make a call. In response, the base station BS responds to the call if there is free space on the wireless line connecting the mobile stations PS1 to PSm, and also sends a signal to the wired terminal that is the calling source to prompt it to send a second dial number. Send. When the speaker who receives this signal inputs a second dial number by dialing, a second dial signal corresponding to this second dial number is sent to the base station BS via the exchange EX. At the base station BS,
First, it is determined from this second dial signal whether the called mobile station belongs to the own system or not, and if the result of this determination is that the called mobile station belongs to the own system, multiple wireless lines for calls owned by the own system ( Select an empty call channel from among the call channels. Then, an incoming signal into which information for specifying the communication channel (communication channel designation information) is inserted is created, and this incoming signal is transmitted to the mobile station PS1 via the control radio line.

When the mobile station PS1 receives an incoming signal during standby, it determines whether or not this incoming signal is addressed to the current station.
If the call is addressed to the local station, an incoming call response signal is returned, and control is performed to establish a call channel with the base station BS in accordance with the call channel designation information inserted in the incoming signal.

[0006] On the other hand, when the base station BS receives the incoming call response signal back from the mobile station PS1, it controls the establishment of a communication channel with the mobile station PS1 to establish the communication channel, and in this state, the base station BS Sends a call signal to. As a result, in the mobile station PS1, a ringing sound is generated from the sounder in response to the above-mentioned paging signal, thereby paging the speaker. When the speaker responds to this call by going off-hook, a control signal to that effect is transmitted to the base station BS, which causes the base station BS to
and the mobile station PS1. In this way, a communication path is formed between the wired terminal on the calling side and the mobile station PS1, and subsequent communication between the two becomes possible.

[0007]

[Problems to be Solved by the Invention] However, such conventional systems have had the following problems to be solved. In other words, a subscriber who carries a mobile station device cannot always respond to incoming calls to the mobile station he or she owns. For example, the subscriber may be located at a different location away from his or her own mobile station, making it virtually impossible to respond to incoming calls to the subscriber's mobile station. In such a case, the wireless communication channel between the base station BS and the calling mobile station PS1 remains connected until the caller abandons the call.

[0008] Generally, this type of system employs a multi-channel access method in which each mobile station shares a smaller number of wireless communication channels than the number of mobile stations. For this reason, it is extremely undesirable in terms of effective use of wireless communication channels to dedicate valuable communication channels to calls from mobile stations that are unlikely to respond.

[0009] Therefore, an object of the present invention is to prevent the wireless communication channel from being used when an incoming call occurs to a mobile station that is unable to respond to an incoming call, thereby making it possible to effectively utilize the wireless communication channel. To provide a mobile radio communication system in which a caller does not have to make meaningless calls and can always and reliably call a desired party.

0010

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a base station that is connected to a wired communication network via a wired line, and a base station that can be connected to the base station via a wireless line. In a mobile radio communication system comprising a plurality of mobile stations and having a function of connecting a base station to a corresponding mobile station via an empty radio line in response to an incoming call from a wired communication network, At least one of them is provided with means for inputting information related to transfer information, and means for transmitting information related to the transfer mode inputted by this means to the base station.

[0011] The base station also includes storage means for storing information related to transfer sent from the mobile station, mode determination means, and transfer control means. When an incoming call is received from the wired communication network to the mobile station, the mode determining means determines whether a transfer mode is designated for the mobile station based on the information stored in the storage means. As a result of this determination, if it is determined that the transfer mode is designated, the transfer control means calls the transfer destination based on the information stored in the storage means and communicates with the caller. It was designed to connect.

0012

[Operation] As a result, according to the present invention, information related to the transfer mode is registered in advance in the base station in response to the notification from the mobile station.
When an incoming call occurs to a mobile station registered in this transfer mode, the base station does not call this mobile station, but performs a transfer operation to the transfer destination. Therefore, for example, the problem of wastefully setting up a wireless line for a mobile station that is known to be absent can be prevented, thereby increasing the effective utilization rate of the wireless line.

[0013] Also, for the caller, if the mobile station is not present, the call will be automatically transferred to an alternative destination, so the caller will have to make a call again or give up on contacting the other party. This is no longer necessary and is very convenient.

[0014]

Embodiment FIG. 1 is a schematic configuration diagram showing an example of a mobile radio communication system according to an embodiment of the present invention. This is what I did. In this figure, the same parts as in FIG. 5 are given the same reference numerals.

First, the mobile stations PSS1 to PSSm, in addition to various normal control means such as connection control of a wireless communication channel associated with outgoing or incoming calls and communication control during a call, also perform transfer mode information input means 61 and transfer mode information notification. means 62. The transfer mode information input means 61 is used to input information such as information specifying whether or not to transfer an incoming call and a transfer destination dial number. Further, the transfer mode information notification means 62 transmits the information inputted by the input means 61 to the base station BSS.

The base station BSS includes a communication path switch 1, a wireless transmitting/receiving circuit 2, a memory circuit 3, a control circuit 4, wired line interface circuits H1 to Hn, and wireless transmitting and receiving interface circuits F1 to Fl. . In addition, 5
is a data bus that connects these circuits and serves as a transmission path for various control signals.

Wired line interface circuits H1 to Hn
are connected to the exchange EX of the wired telephone network via wired lines CL1 to CLn, respectively, and provide an interface between the wired lines CL1 to CLn and the communication path switch 1. The wireless transmitting/receiving interface circuits F1 to Fl perform predetermined interface operations with respect to the wireless transmitting/receiving circuit 2. The communication path switch 1 connects the wired line interface circuits H1 to Hn and the wireless transmission/reception interface circuits F1 to Fl in accordance with a control signal from the control circuit 4, and connects the wired line interface circuits H1 to Hn to the wireless transmission/reception interface circuits F1 to Fl.
1 to Hn are exchanged and connected to each other. Also, memory circuit 3
stores transfer mode information consisting of information indicating whether to transfer or not and a transfer destination terminal number in association with each mobile station.

[0018] The control circuit 4 controls the mobile station PSS associated with outgoing and incoming calls.
In addition to normal control such as communication channel establishment control between 1 to PSSm, mode setting means 41 and mode determining means 4
2 and a transfer control means 43. The mode setting means 41 monitors the arrival of transfer mode information from the mobile stations PSS1 to PSSm, and when the transfer mode information arrives, stores this information in the storage circuit 3 in association with the source mobile station. be. The mode determining means 42 determines whether a transfer mode is registered for the mobile station based on the information stored in the storage circuit 3 when a call is received from the exchange EX of the wired telephone network to the mobile station. When the mode determining means 42 determines that the transfer mode is designated, the transfer control means 43 acquires a vacant wired line and then transfers the data according to the transfer destination terminal number stored in the storage circuit 3. A dial signal is sent to the exchange EX, and when the transfer destination responds, a connection is established between the transfer destination and the calling party. Next, the operation of the system configured as above will be explained.

In the standby state, the control circuit 4 causes the base station BSS to control the mobile station PSS in step 2a as shown in FIG.
At step 2b, the mobile stations monitor the occurrence of outgoing calls from the mobile stations PSS1 to PSSm, and at step 2b monitor the occurrence of incoming calls from the wired telephone network, and further monitor the arrival of transfer mode information from the mobile stations PSS1 to PSSm at step 2c.

[0020] In this state, any mobile station, for example, PSS
Assume that in step 1, the speaker specifies and inputs the transfer mode and also inputs the telephone number of the transfer destination. Then the mobile station PSS
1 generates a control signal into which information specifying the transfer mode, a transfer destination telephone number, and an ID number representing the mobile station name are inserted, and sends this control signal to the base station BS via a control channel.
Send to S.

On the other hand, the control circuit 4 of the base station BSS:
In step 2c, the mode information sent by the control signal is detected, and in step 2d, the mode information is written into the storage circuit 3.

Now, assume that in this state, a call is made to the mobile station PSS1, which has specified the transfer mode, using a wired telephone device (not shown). Then, the wired telephone network exchange EX selects a vacant line from among the wired lines CL1 to CLn to which the plurality of representative numbers are assigned, for example C.
An incoming call signal (ringing signal) is sent to the base station BSS via L1.

On the other hand, the base station BSS detects this incoming call signal with the wired line interface circuit H1, and notifies the control circuit 4 of the arrival of the incoming call signal via the data bus 5. Upon receiving the notification, the control circuit 4 first determines in step 3a whether or not it is ready to accept an incoming call, as shown in FIG. This determination is made by checking whether the communication channel is free. As a result of this determination, if the incoming call can be accepted, the control circuit 4 instructs the wired line interface circuit H1 via the data bus 5 to respond to the ringer call (equivalent to off-hook in a telephone) in step 3b. Upon receiving the instruction, the subscriber line interface circuit H1 responds to the ringer call and sends a voice signal or tone signal requesting the caller's wired telephone device to send out a second dial number for calling the desired mobile station. Send. Note that if it is determined in step 3a that it is not possible to accept an incoming call, the control circuit 4 will:
In step 3c, a busy signal is sent to the exchange EX of the wired telephone network.

[0024] When the calling party receives the signal urging the second dial and inputs the second dial number of the mobile station PSS1 by dialing, the second dial signal corresponding to the second dial number is sent to the wired line interface circuit via the exchange EX. It is input to H1 and detected. The wired line interface circuit H1 supplies the detected second dial number to the control circuit 4. The control circuit 4 monitors the arrival of the second dial number in step 3d, and when the second dial number arrives, it determines in step 3e whether or not the called destination mobile station belongs to a subscriber within its own system. When it is confirmed that the call is within the own system, it is then determined in step 3f whether a transfer mode has been designated for the called destination mobile station (PSS1 in this case). This determination is made based on mode information stored in the storage circuit 3.

Now, as a result of this determination, if the transfer mode is set for the mobile station PSS1, the control circuit 4 executes the following transfer control without performing incoming call control for the mobile station PSS1. That is, as shown in FIG.
The forwarding destination telephone number stored in association with is read out. Then, in step 3i, after capturing a vacant line, for example, CL2, from among the wired lines CL2 to CLn,
In step 3j, a dial signal corresponding to the transfer destination telephone number is sent out from the wired line interface circuit H2. After sending this dial signal, the control circuit 4 monitors whether or not the transfer destination terminal responds in step 3k. If a response is detected, the control circuit 4 moves to step 3l, where the call path switch 1 initiates a call. The wired line CL1 on the side is connected to the wired line CL2 on the transfer destination. In this way, a conversation between the calling party and the speaker at the transfer destination is possible from now on.

[0026] As described above, in this embodiment, when a call arrives at a mobile station for which transfer mode is set,
Call termination control for this mobile station is not performed, and a call is made to the transfer destination. Therefore, the meaningless exclusive use of a communication channel during a ringer call as in the conventional case is not carried out between the mobile station and the base station, and thereby effective use of the communication channel can be realized. In addition, callers who wish to talk to mobile station subscribers are automatically transferred to the forwarding destination, eliminating the need for operations such as dialing back, thereby simplifying the call operation. You can also eliminate wasted time.

Note that the present invention is not limited to the above embodiments. For example, in the embodiment described above, an incoming signal arriving at a base station is transferred to a terminal in a wired communication network, but it may also be transferred to another mobile station owned by the base station. Furthermore, in the embodiment described above, the forwarding destination telephone number was input as transfer mode information in the mobile station and then sent to the base station. However, the forwarding destination telephone number is registered in advance at the base station, and It is also possible to send only the information on whether to transfer or not. Furthermore, in the embodiment described above, incoming calls from the wired telephone network terminal to the mobile station are made using the second dial system, but a normal dial system may also be used. Furthermore, as a wireless connection method between a base station and each mobile station, in addition to the frequency multiple access (FDMA) method in which one radio frequency wave is used as one communication channel, there is also a frequency multiple access (FDMA) method in which one radio frequency wave is used as one communication channel. A time division multiple access (TDMA) method may be used in which one communication channel of the slot is used. Various other modifications can be made without departing from the spirit of the invention.

[0028]

[Effects of the Invention] The normal mode in which the mobile station is called and connected to the incoming signal from the wired telephone network to the mobile station, and the transfer mode in which predetermined transfer processing is performed are selectively performed according to the specifications of the mobile station. At the base station, when a mobile station subscriber leaves his/her own mobile station device, the subscriber specifies the transfer mode to the base station as necessary, and the signal that calls the mobile station is transmitted to the mobile station. There will be no connection and transfer processing will be performed at the base station. This prevents the mobile station and the base station from monopolizing meaningless communication channels during a ringer call as in the prior art, thereby realizing effective use of communication channels. Furthermore, a caller who wishes to talk to a mobile station subscriber does not need to make unnecessary calls to the mobile station, which is unlikely to respond due to the absence of the subscriber.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an example of a mobile radio communication system using a second dial method according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a control procedure and control contents of a control circuit of the mobile radio communication system shown in FIG. 1;

FIG. 3 is a flowchart showing the control procedure and control contents of the control circuit of the mobile radio communication system shown in FIG. 1;

FIG. 4 is a flowchart showing a control procedure and control contents of a control circuit of the mobile radio communication system shown in FIG. 1;

FIG. 5 is a schematic configuration diagram showing an example of a mobile radio communication system using a conventional second dial system.

[Explanation of symbols]

EX...wired telephone network switch, BS, BSS...base station, PS
1~PSm, PSS1~PSSm...mobile station, CL1~C
Ln...wired line assigned a representative number, H1-Hn...wired line interface circuit, F1-Fl...wireless transmission/reception interface circuit, 1...communication path switch, 2...wireless transmission/reception circuit, 3...storage circuit, 4...control circuit , 5...Data bus.

Claims (1)

[Claims] Claim 1: A base station connected to a wired communication network via a wired line, and a plurality of mobile stations that can be connected to the base station via a wireless line, and capable of receiving calls from the wired communication network. On the other hand, in a mobile radio communication system in which a base station has a function of connecting a corresponding mobile station via an empty radio line, at least one of the mobile stations has a function for inputting information related to transfer information. and means for transmitting information related to the transfer mode inputted by the means to the base station, and the base station is configured to store information related to the transfer sent from the mobile station. storage means for determining whether a transfer mode is designated for the mobile station based on information stored in the storage means when an incoming call is received from the wired communication network to the mobile station; a mode determining means; and when the mode determining means determines that a transfer mode is designated, a forwarding destination is called based on information stored in the storage means, and a connection is established between the calling party and the calling party; 1. A mobile radio communication system, comprising: a transfer control means for controlling transfers.