JPH0328857B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention is applied to a public automobile telephone system,
The present invention relates to a wireless telephone switching system capable of providing a command telephone service with an in-vehicle terminal. Conventionally, in exchange services using public automobile radio telephones, only one-to-one calls are allowed because the purpose is only for calls between an unspecified number of subscribers. In contrast, in a general command telephone system, the channel frequency can be easily changed or adjusted if necessary, and the base unit can issue commands to multiple designated slave units simultaneously through that channel. . In recent years, there has been a desire to incorporate such a command telephone system into the above-mentioned public vehicle radio telephone system to provide both of these exchange services, but 1:n command calls for business use are subject to crosstalk. There is a possibility that this could lead to wiretapping, wiretapping, etc., and considering the need to protect general subscribers, both of these aspects cannot be tolerated and the implementation has not yet been seen. An object of the present invention is to set up a press-and-talk command telephone group from among a plurality of radio telephone terminals in a general public car telephone system, and to set the radio frequency (or channel) setting function of the terminals in the group. By equipping the wireless telephone exchange, the terminals in the above group can not only be used as individual telephones for general public use, but also be assigned any radio frequency (or channel) when a command telephone is needed, and can be used for eavesdropping. The object of the present invention is to provide an economical and highly flexible wireless telephone switching system that can eliminate the occurrence of interference. According to the present invention, an exchange switch, a processor that controls the connection of the exchange switch, and a subscriber number and ID of a slave device accessed by the processor are provided.
a storage device for storing a number; a paging signal sender controlled by the processor; a paging response receiver for receiving a paging response and transmitting the response to the processor; A wireless telephone switching system that connects a telephone line between a general public telephone system and a plurality of automobile subscriber telephone terminals, the wireless telephone switching system comprising first and second telephone channel control devices that control telephone communication channels; In order to establish a command communication path using a press-and-talk method between a plurality of handset subscriber telephone terminals set in advance from among the terminals and a base subscriber telephone terminal, the processor may Upon receiving a call via the switching switch and the second call channel control device with the called subscriber number for the command telephone group pilot, accessing the storage device and knowing the ID number of the corresponding handset;
It calls these multiple handsets via the paging signal sender and the paging response receiver, receives their responses, and then instructs them to move to a designated empty channel number, and after receiving the response again, switches to the empty channel. Connecting to a first call channel control device as a call channel via the exchange switch, and sequentially receiving ID numbers from slave units sent from the first call channel control device via the call channel. Upon receiving the report, the first call channel control device again sent instructions to each handset to which the ID number was sent to operate in the designated type of command phone group class. and controlling the exchange switch to release the communication path of the exchange switch from the first and second communication channel control devices, and connect the communication path of the child device and the communication path of the base device. A wireless telephone switching system is obtained which is characterized by the following. Next, a wireless telephone switching system according to the present invention will be explained with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a wireless telephone switching system as an embodiment of the present invention. In this figure, SUB1 is a general subscriber telephone connected to the switching network, and subscriber exchange 2 is
The general exchange accommodating the SUB 1, the trunk exchange 3, shares the function of coupling between the mobile telephone exchange 4 and the subscriber exchange 2. However, in a small-scale switching network, the wireless telephone exchange 4 and the subscriber exchange 2 may be directly connected without going through the relay exchange 3. Under the control of the mobile telephone exchange 4, the radio base station device 5 transmits and receives radio waves to and from mobile radio terminals within its own service area. Among the mobile radio terminals, SUB6 and SUB7 are general subscriber terminals subscribing to a car telephone, respectively, and SUB8 to SUB10 are slave units subscribing to a radio command service, which also have the function as general individual subscriber terminals. SUB1
Reference numeral 1 denotes a base unit for wireless command service, and like the slave unit, it has the function of a general subscription terminal. In such a configuration, a typical mobile telephone exchange service is capable of handling calls between mobile telephone subscribers who are individually assigned telephone numbers, e.g.
A call is made between SUB6 and SUB7, and between a mobile phone subscriber and a subscriber in the general local telephone exchange network, for example, by setting a call path between SUB6 and SUB1. In this case, in the former case, a communication path from the SUB 6 to the mobile phone exchange 4 via the wireless base station is set up via a dedicated wireless channel, and
The communication path used for SUB7 is also given a dedicated radio channel each time the call occurs. That is, in general telephone exchange services, there is no simultaneous sharing of any call channels, and there should be no such sharing. This is the mission entrusted to public communications networks. On the other hand, in the command telephone service, when the SUB 11 dials the terminating subscriber number for the group pilot on the command telephone, the terminating subscriber number is received by the mobile telephone exchange 4 via the radio base station device 5. When the car telephone exchange 4 receives the call from the SUB 11, it calls the handset subscribers' SUBs 8 to 10 via the return radio base station device 5 and completes the command communication path. FIG. 2 is a block diagram showing a specific configuration of the mobile telephone exchange shown in FIG. 1. Referring to this figure, the operation during the command telephone service will be explained. When the SUB 11 transmits a dial call, the processor (CPU) 4-1 accesses the storage device 4-2 and reads subscriber data corresponding to the called subscriber number dialed by the SUB 11. Figures 3a and 3b show the search for subscriber data from the number of a called subscriber in a wireless telephone exchange according to the present invention, that is, the processor of this exchange is used to determine and analyze what kind of connection service to provide. 3, the storage device 4-2 has previously stored the contents of a receiving subscriber data table as shown in FIG. Data regarding is extracted. Since this FIG. 3a is a memory table used to analyze the number of the called subscriber as described above, it is arranged in numerical order for ease of search. This table shows only the first two and one in the middle, but the omitted parts also include numbers of general subscribers other than the dispatch telephone.
In this embodiment, the same radio command group (telephone group) has two types of group pilot incoming subscriber numbers (representative numbers for calling the entire group), one for important commands and one for general commands. Therefore, it is now possible to provide two different services: general command calls and important command calls. Of these, the latter can forcibly disconnect a slave unit in a wireless command group and make it join the command call if it is in the middle of a call as an individual subscriber. This is indicated by the fact that 00 is not a command, 01 is a general command, 10 is empty, and 11 is an important command under the command telephone pilot column in the figure. In Figure 3a, the called subscriber number "12345" is for important commands, and the called subscriber number "12346" is for general commands.
and "12346" have the same group table 256, so the same table can be used to call group handsets, as shown in the command telephone group table of FIG. 3b. In this example, it is assumed that the SUB 11 dials the important command number "12345". The processor 4-1 receives the ID number "660011" from the SUB 11 via the radio base station device 5, the communication path 100 of the switching switch 4-3, and the second communication channel control device 4-7, and receives the ID number "660011" from the storage device 4-1. The subscriber number corresponding to ID number 660011 in the calling subscriber data table in FIG. 4 for searching caller subscriber data from the mobile device ID number stored in Mobile device ID corresponding to called subscriber number 12345 in trusted subscriber data table
Match the number. As a result, if a match is found, it is confirmed that the caller is a subscriber permitted to perform important command operations, and the requested connection is executed. If there is no match in this verification, this call will be rejected. In this way, from FIG. 4, when the caller is a subscriber of a wireless exchange, it is possible to determine what kind of connection service is allowed, and also to obtain constraint conditions and priority conditions. In the case of this figure 4,
A subscriber number is shown corresponding to each ID number.
In addition, "11" shown under the command telephone group class column in Figure 4 is a terminal that allows both important commands and general commands (base unit in this case), and "10" is a terminal that only requires general commands. "01" is a terminal that can only function as a command telephone slave ("00")
displays general terminals other than command phones (non-command group). After confirming the subscriber, processor 4
-1 notifies the SUB 11 via the second communication channel control device 4-7 that it will be connected in base mode and important command mode. Next, the processor 4-1 learns the subscriber number of each handset from the command telephone group table shown in FIG.
A calling signal is transmitted to each slave unit SUB8 to SUB10 via. The broken line in FIG. 2 indicates that a paging signal is transmitted to SUB8 and SUB9 via channel CH1. An automatic response from each child device to this paging signal is received by the paging response receiver 4-5 via channel CH2. When the processor 4-1 receives a response from the slave unit from the paging response receiver 4-5, it instructs the processor 4-1 to move to the specified channel number of the idle channel CH3 via the paging signal sender 4-4. SUB8 and SUB9 move to the idle channel CH3 and send out their respective ID numbers. These ID numbers are sequentially assigned to the wireless base station device 5.
is received by the first communication channel control device 4-6 via the communication path 101 of the exchange switch 4-3, and transmitted to the processor 4-1. When the processor 4-1 receives each ID number, it sends the SUB8 and
Send instruction data to each SUB9 to operate in important command telephone mode. The data here is sent with each ID number, so
This signal is received by each slave device SUB8 and SUB9. Note that the sending of this signal corresponds to the time when bell ringing instruction data for displaying an incoming call is sent when controlling for a general single subscriber. By the way, it is assumed that another handset SUB10 is talking to a general subscriber of another station via the outgoing trunk 4-9 using the channel CH4.
When the processor 4-1 determines that the current call should be forcibly disconnected and switched to the important command call using the operation circuit based on the incoming call processing judgment logic table shown in Table 1, the processor 4-1 activates the exchange switch 4-1. The third communication path 102 is disconnected, and the third communication path 103 is disconnected.
connection to the communication channel control device 4-8. The processor 4-1 further sends a channel CH to the SUB 10 via this communication channel control device 4-8.
Send instruction data to move to step 3. SUB10
When the ID number is transmitted to channel CH3, the first communication channel 4-6 receives it and reports it to the processor 4-1. Processor 4-
1 instructs the SUB 10 to operate in the important command communication mode via the first communication channel control device 4-6, and releases the channel CH4 and the third communication channel control device 4-8. Furthermore, processor 4-1 has all slave units on channel CH.
3, the first and second communication channel control devices 4-6 and 4-7, communication paths 101 and 100 are released, and a new communication path 10 is established.
Close 4. This ends the series of connections. In addition, the main unit SUB11 and slave units SUB8 to 10 are as follows:
As shown in FIG. 4, each subscriber has an independent subscriber number, and when not in the command telephone mode, they can make and receive calls in the same way as a general single subscriber.

[Table] In the above explanation, as shown in FIG.
has become the command base unit, but if there is no worker at the base station location, the command phone group slave unit previously determined by the group class code “10” will be given the function as a quasi-base unit. By this, SUB
Instead of 11, the slave machine can summon other slave machines to the command call. In addition, as a result of judgment using the incoming call processing judgment logic table in Table 1, if a general incoming call is received for a handset that is in a command call state, the basic method is to set it as busy, but depending on the customer's wishes, The information can then be transferred to another car phone subscriber terminal (not shown) or to a general wired phone subscriber. In reality, when the transfer destination subscriber terminal is installed on the side of the command telephone group base unit and receives the transfer call,
The necessary message can be sent to the original called party via the command telephone. Furthermore, if it becomes necessary to give commands to all slave units during the general command telephone service, by dialing the busy service special number from the command telephone base unit, the processor 4-1 in FIG. In order to confirm all the command telephone slave units belonging to SUB11, the command telephone group pilot number is known from the originating subscriber data table shown in FIG. Furthermore, the incoming subscriber data table shown in FIG. 3 is checked, all handset numbers are known from the command telephone group table, and the communication path 104 is temporarily canceled. Then, the channel CH3 is connected to the first channel control device 4- by the communication path 101.
6 to instruct each handset to shift to the important command call mode, and receive each shift completion signal. On the other hand, a subscriber who has left the general command line can forcibly disconnect other calls and call the important command line in the same way as explained in the embodiment for SUB10. can. FIG. 5 shows a configuration example of the slave unit SUB10 in FIG. 2 as an example. In the figure, an antenna 10-1 is used for both transmission and reception, and is connected to a receiver 10-3 and a transmitter 10-5 via a mixer 10-2. Although the transmitting and receiving frequencies are set by the synthesizer 10-4, the actual setting logic is controlled by the logic section 10-10. The data transmitter 10-6 is connected to the logic section 1
Under the control of 0-10, transmission data to be sent to the wireless telephone exchange is transmitted. Bandpass filter 10-7 reduces noise caused by in-band data in order to provide the received voice to speaker 10-24 or receiver 10-27. Bypass filter 10-8 is used for data reception to remove audio components. Audible sound oscillator 1
0-9 is the oscillation source of the local call tone controlled by the logic unit 10-10, and the ring tone, busy tone, etc. are controlled by the terminal according to the data received from the wireless telephone exchange or at the discretion of the logic unit 10-10. The signal is supplied to the speaker 10-24 or the receiver 10-27 in order to notify the person. Handset 1
0-26 is dial 10-28, handset 10-
27 and a transmitter 10-29. Speakers 10-24 can be used not only for ringing, but also for telephone calls if desired by the subscriber. Of course, this is indispensable when making calls using the command line. Hook switches 10-21, 10-22 and 10-23 are activated when the subscriber lifts handset 10-26 to distinguish between on-hook and off-hook conditions of handset 10-26. The relays 10-15 are unique to the present invention, and are used to transmit instructions from the radio telephone exchange to the logic unit 1 regarding the status of the command telephone.
0-10 is driven by reception. Contacts 10-16, 10-17 and 10-18 are contacts of relay 10-15. Switching of audio reception to the speaker 10-24, switching of audio transmission to the microphone 10-25, and lighting of the "general" lamp 10-19 are performed, respectively. The "Important" display by the lamps 10-13 indicates the important command call mode. In addition, the lamp 10-
The "base unit" display indicated by 14 is lit under the control of the logic unit 10-10 when the base unit or slave unit is given the function of the base unit mode. The telephone key 10-20 is used to cause the microphone 10-25 to be used in a press-and-talk state while operating as a command telephone. Electric key 10-12
is a reset key for escaping the call when the handset is in the general command mode, and is given logic by the logic section 10-10 so that it does not operate in the important mode. Dial control circuit 10-11
is a circuit for converting and relaying the dial signal of the dial 10-28 to the logic section 10-10. In addition, in such a configuration, the elements particularly provided for implementing the present invention are a logic circuit of the logic section 10-10, a relay 10-15 for setting the general command telephone state, and its contacts 10-16, 10-
17, 10-18, display lamp 10-19,
and a telephone key 10-20. As is clear from the above explanation, according to the present invention, a press-and-talk type command telephone group is set from among a plurality of wireless telephone terminals in a general public car telephone system, and the radio frequency of the terminals in the group is set. By equipping the wireless telephone exchange with a (or channel) setting function,
Not only can the terminals in the above group be used as individual telephones for general public use, but they can also be assigned any radio frequency (or channel) when necessary as a command telephone, thereby eliminating the occurrence of eavesdropping, interference, etc. Alternatively, by introducing the features of the present invention into an existing general public automobile radio telephone system, it becomes possible to easily use both services in combination, and the effect of improving economic efficiency is significant.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a wireless telephone switching system as an embodiment of the present invention, and FIG.
A block diagram showing the specific configuration of the mobile telephone exchange in FIG. 1, and FIGS. 3a and 3b show the contents of the incoming subscriber data table and command telephone group table, respectively, stored in the storage device in FIG. FIG. 4 is a diagram showing the contents of the calling subscriber data table stored in the storage device 4-2 in FIG.
It is a figure which shows the example of a structure of the slave subscriber terminal in a figure. In the figure, 1 is a general subscriber telephone (SUB);
2 is a subscriber exchange, 3 is a relay exchange, 4 is a car telephone exchange, 5 is a wireless base station device, 6 and 7 are general subscriber terminals (SUB) for car phones, and 8 to 10 are slave units that can be used in combination with a command line. Subscriber terminal (SUB), 11 is a base subscriber terminal (SUB) that also serves as a command line, 4-1
is a processor (CPU), 4-2 is a storage device, 4-
3 is an exchange switch, 4-4 is a paging signal sender, 4-5 is a paging response receiver, 4-6,
4-7 and 4-8 are first, second and third communication channel control devices, respectively, and 4-9 is an outgoing trunk.

Claims (1)

[Scope of Claims] 1. An exchange switch, a processor that controls the connection of the exchange switch, a storage device that stores subscriber numbers and ID numbers of slave devices accessed by the processor, and a paging signal sender; a paging response receiver that receives a paging response and sends the response to the processor; and first and second speech channel controls connected to the switching switch and controlling speech channels according to instructions from the processor. In a wireless telephone switching system that connects a communication path between a general public telephone system and a plurality of automobile subscriber telephone terminals, the device includes a plurality of handset subscriber telephone terminals set in advance from among the plurality of automobile subscriber telephone terminals. In order to establish a command communication path using a press-and-talk method between the terminal and the base phone subscriber telephone terminal, the processor
When receiving a call from the base unit via the exchange switch and the second communication channel control device with the incoming subscriber number for the command telephone group pilot, the system accesses the storage device and learns the ID number of the corresponding slave unit. , calls these plural handsets via the paging signal sender and the paging response receiver, receives the responses, and further instructs them to move to a designated empty channel number;
After receiving the response again, the empty channel is set as a communication channel and connected to the first communication channel control device via the exchange switch, and the message is sent from the first communication channel control device via the communication channel. When receiving a report that the ID numbers have been received sequentially from the handsets that have received the ID number, the first call channel control device again transmits the specified type to each handset that has received the ID number. After sending an instruction to operate in the command telephone group class, the exchange switch is controlled to release the communication path of the exchange switch from the first and second communication channel control devices, and the communication on the handset side is controlled. A wireless telephone switching system characterized in that a communication path on the base unit side is connected to a communication path on the base unit side.