JPH0519851B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a wireless selective calling system suitable for pagers. In this type of conventional radio selective calling system, the zone in which one receiver can receive a call is basically limited to one zone. For this reason, when widening the area of the radio selective calling system, simply widening one zone has the disadvantage that the transmission power of the base station increases and the efficiency of using the radio line decreases. Furthermore, even in the case of a selective calling system that is divided into a plurality of zones, it is necessary for the receiver to register one of the zones in advance, and there is a drawback that there is a lack of flexibility in changing the callable area. The present invention eliminates these drawbacks and generally allows the subscriber making the call to know in which area the receiver is moving, even if the receiver is moving. Because it is often attached,
The present invention takes advantage of this and focuses on economical use of radio frequencies by further specifying the calling area even for receivers registered in wide area zones. That is, an object of the present invention is to provide a radio selective calling system that can make the use of radio frequencies more efficient over a wide service area. According to the present invention, when the subscriber making the call knows where the target receiver is moving, it is possible to specify that the call should be made only in that area. Furthermore, if a particular receiver has a limited movement area, it can be specified that the receiver always makes calls only in that area. The present invention provides storage means for storing subscriber information in a control device that controls the transfer of a calling number to each zone of a wireless paging system, and a call from a subscriber telephone making a call is stored in the storage means. A function is provided to register whether or not region input can be specified, and if the calling region is registered so that input can be specified by the subscriber's telephone, the region is specified when inputting the call. It is characterized by Hereinafter, the present invention will be explained in detail based on one embodiment. FIG. 1 is a system configuration diagram of an embodiment of the present invention. In the figure, 1 is a subscriber telephone, 2 is a general switching network, and 3 is a central control unit. Subscriber telephone 1
is connected to a central control unit 3 via a general switching network 2. This central control device 3 is connected to zone control devices for each zone. Zone A is a high-traffic zone in a metropolitan area, and is provided with a zone control device 5A. Also zone B,
C, D, and E are zones with relatively little traffic in areas around major cities (hereinafter referred to as "regional zones").
That's what it means. ), each zone controller 5
B, 5C, 5D, and 5E are provided.
Each zone control device is connected to the transmitter 10 in each zone and controls the transmitter 10. With this configuration, when the calling number of a receiver (not shown) to be called is dialed by the subscriber telephone 1, this calling signal is input to the central control unit 3 via the general switched network 2. The central control device 3 determines whether or not a receiver corresponding to the received calling signal is registered, and if so, in which zone it should be called, and selects the zone where the calling signal should be called. Transfer to control device. For example, if the calling signal is to be called in zone B, it is transferred to the zone control device 5B. The zone control device 5B encodes the calling signal transferred from the central control device 3 into a signal to be sent to a wireless line, and transfers it to each transmitter 10 in its own zone. FIG. 2 is a time chart of the frequency structure transmitted from the transmitter according to the embodiment of the present invention. In the figure, a1, a2, a3, a4 indicate signals transmitted from the transmission system of zone A, and b
indicates signals transmitted from the transmission system in zone B, c in zone C, d in zone D, and e in zone E, respectively. In addition, TS1 and TS2 indicate time slots, and time slot TS2 further includes four
It is divided into sub-time slots TS21 to TS24. Zone A has a high call volume and therefore has signals a1, a2, a3 and a4 transmitted from four transmitting systems. Each transmitter 10 controlled by the zone control device shown in FIG. 1 is capable of multi-frequency switching, and performs transmission while switching frequencies at the transmission timing shown in FIG. 2. That is, in this embodiment, four frequencies ₁ to ₄ are used for wide area services, and four frequencies _L1 to _L4 are used for local services. Also, the transmission timing is TS1 and TS2.
There are two types of time slots each lasting several minutes. In zone A where the call volume is high, a wide area service wave is sent out to time slot TS1 without using a sub-time slot, and a local service wave is sent out to time slot TS2. In each time slot, four wide area service waves and four local service waves are simultaneously transmitted. On the other hand, from zone B to zone E, the local service wave is assigned to time slot TS1. The time slot TS2 is divided into sub-time slots TS21 to TS24, and four wide area service waves are transmitted within each time slot. In zone B, frequency ₁ is transmitted at TS21 (FIG. 2b), and in zone C, frequency ₂ is transmitted at TS21 (FIG. 2c). In zone D, frequency ₃ is transmitted at TS21 (d), and in zone E, frequency ₄ is transmitted at TS21 (e). Similarly, frequencies are assigned to other sub-time slots so that the same frequency is not transmitted at the same time. As described above, since the frequency is switched according to the time chart and the signal is transmitted in each zone, the same frequency is not transmitted at the same time between the zones, and no frequency interference occurs. A receiver (not shown) is assigned one reception frequency among the frequencies. Further, the acoustic output of the receiver is configured to be transmitted when the code transmitted at the receiving frequency matches the code defined for the receiver. As shown in Figure 2, since frequency ₁ is transmitted in all zones, a receiver to which frequency ₁ is assigned can receive signals in all areas without having to specifically switch the frequency on the receiver. Is possible. FIG. 3 is a detailed circuit diagram of a central control unit according to an embodiment of the present invention. In the figure, an input section 12 is a section that receives a paging signal sent from the general switching network 2. The output of this input section 12 is connected to the input of a control section 13 and a speech recognition device 14. A subscriber data file 15, a time reference section 16, and a control console 17 are connected to other inputs of the control section 13. Further, the output of the control section 13 is connected to an output section 18, and the output of this output section 18 is connected to the zone control devices 5A and 5.
Connected to B, 5C, 5D, and 5E. That is, four of the output sections 18, zone A
It is used as an output to zone E from zone B.
The outputs up to this point are each performed by one output section 18. The time reference unit 16 is a timing circuit that provides the control unit 13 with the output timing of the output unit 18, and the control console 17 is provided outside the central control unit 3 and is used to change the contents of the subscriber memory. and contents confirmation using a CRT terminal, etc. The interface between the general switching network 2 and the input unit 12 is an end-to-end method, after only a line connection is made between the general switching network 2 and the input unit 12.
The voice recognition device 14 allows the subscriber using the subscriber telephone 1 to receive a calling number by voice. Note that the voice recognition device 14 includes a voice synthesis device, which synthesizes the received calling number into voice, returns it to the subscriber telephone 1, and receives a confirmation response from the subscriber, after which the control section 13 By transferring the call number to , it is possible to avoid entering the incorrect call number. The control unit 13 processes the calling number in accordance with the subscriber information corresponding to the transferred calling number in the subscriber data file 15. The subscriber data file 15 is composed of core memory, semiconductor memory, magnetic disk, or the like. FIG. 4 is a memory configuration diagram of one subscriber in the subscriber data file 15 according to the embodiment of the present invention. 1st
The table shows the contents of each item in the subscriber data memory.

[Table] 19 is the subscription registration section, 20 is the call plate section, 2
1 is a calling area section, 22 is a frequency designation section, and 23 is a calling number section. One bit is assigned to this subscription registration section 19, and when it is ``0'', it indicates that subscription registration has not been made, and when it is ``1'', it indicates that subscription registration has been made. One bit is assigned to the call grade section 20, and when it is ``0'' it indicates that the receiver subscriber is a subscriber of the local area call registration, and when it is ``1'' it indicates that the receiver subscriber indicates that the subscriber is a wide area call registration subscriber. Three bits are assigned to the calling region section 21, and it is possible to indicate a numerical value from "0" to "7", and in the case of "1", it indicates a call to zone A.
"2" indicates a call to zone B. Similarly, "5" indicates a call to zone E. Further, the frequency designation section 22 represents the reception frequency classification of the receiver of the receiver subscriber. That is, four bits are allocated to the frequency designation section of this embodiment, with "1" to "4" corresponding to frequencies ₁ to ₄ , respectively, and "11" to "14" corresponding to frequencies _L1 to _L4 , respectively. Furthermore, in this embodiment, 7 bits are allocated to the number of calls section 23, which is accumulated by ``1'' in binary for each call request, records the number of times the subscriber has been called, and charges Use as the basis of calculation. With such a configuration, when a calling number is input from the input unit 12, the control unit 13 reads the content of the subscriber memory corresponding to the calling number from the subscriber data file 15, and processes the calling number according to the content. do. First, assuming that the subscriber has been registered, if the call grade content is a local area call, then the content of the subscribed area part and frequency part is as follows:
determining the output unit 18 to which the calling number should be transferred;
The calling number is transferred to the corresponding output unit 18. If the call grade is a wide area call, the output unit 18 to which the call number should be transferred is determined according to the call specification, and the call number is transferred to the corresponding output unit 18. Next, subscriber data file 1 according to the embodiment of the present invention
Table 2 shows an example of the input number 5.

[Table] The input digits consist of 5 digits, and the last digit indicates the area designation. Table 3 is a table showing the relationship between the last digit of this region designation input and the calling region.

[Table] In this example, if the last digit is "0", it indicates the registered area, if the last digit is "9", it indicates a call in all areas, and "1" to "5" In the case of , it indicates calls in each area. Table 4 shows an example of the subscriber data file 15 of this embodiment.

[Table] According to Table 1, address 6578 is registered as a subscriber because the subscription registration field is "1." Also, since the calling grade part is "0", it is a regional call, and since the calling area part is "2", the calling area is zone B. Also, since the frequency designation section of the receiver is "2", the frequency is ₂ , and the number of calls section is "5", indicating that the call has been called five times so far. Also, address 6579 has been subscribed because the subscription registration section is "1", and the calling grade section is "1", so the calling grade is wide area calling, and the calling area section is "1". Therefore, the calling area is Zone A. Further, since the frequency designation section of the receiver is "11", the frequency is _L1 , and the number of calls section is "3", indicating that there have been three calls so far. Furthermore, the subscription registration field for address 6580 is "0", so there is no subscription registration, so of course no calls are made, but one call request due to an incorrect dial etc. caused the number of calls. It is shown in the section. The central control unit 3 determines the output unit 18 to which the calling number should be transferred based on the contents of the subscriber memory in the subscriber data file 15 as described above, and transfers the calling number together with the frequency information. This output unit 18 is provided with a memory for storing a calling number, and this memory stores the calling number together with frequency information. The time reference unit 16 provides the control unit 13 with the start timing of each time slot. When the control section 13 obtains the time slot start timing from the time reference section 16, the control section 13
The time slot timing is transferred to each output section 18. When this transmission timing is input, each output section 18 reads a calling number having a frequency designation corresponding to the time slot timing specified at that time from the memory of the output section 18, and sends the call number to the zone control device of each zone as a calling signal. Transfer to. This call signal is a call number converted into a format suitable for transfer between the central control unit 3 and the zone control unit. FIG. 5 is an example of a transfer format for transferring data from the central control device 3 of this embodiment to each zone control device. First, the frequency designation signal word 24 is transferred,
Subsequently, subscriber signal words 25 are sent out one after the other. Each word is BCH (Bose−Chaudhuri−
It is composed of Hocquenghe-m) codes. FIG. 6 is a diagram showing the configuration of the transmission system in zone B of this embodiment. In the figure, zone B includes one zone control device 5B and four transmitters 10. The zone control device 5B includes an encoder section 26 and four semi-fixed delay circuits 27. The input of the encoder section 26 is connected to the output of the central control device 3. Also, the semi-fixed delay circuit 27
The output of is connected to each transmitter 10. This semi-fixed delay circuit 27 corrects the delay time difference between the signals generated in each contact line 28 due to the difference in length and type of the contact line 28, and makes the phases of the modulated signals sent from each transmitter 10 almost the same. It is for the purpose of This configuration allows simultaneous transmission of the same wave within zone B. The encoder section 26 has a transmitter control function and a function of converting a calling number into a calling code suitable for reception by a receiver. Further, the encoder section 26 is
When receiving a frequency designation signal from the central control device 3, it sends a signal to the transmitter 10 to designate the frequency.
The transmitter 10 has a function of switching and transmitting multi-frequency transmission waves, and switches the frequency according to a frequency designation signal from the zone control device 5B. Next, the encoder section 26 encodes the paging signal sent from the central control device 3 into a paging code suitable for reception by the receiver and sends it to the transmitter 10. The transmitter 10 modulates a transmission wave with a calling code and transmits the modulated wave. A transmission time chart made in this manner is shown in FIG. 2b. Similar operations are performed in zone C, zone D, and zone E. It should be noted that an end to
Although an example of the end method is shown, it may be realized using parallel connections or using serial signals. As described above, according to the present invention, a paging signal is sent only to the area where paging is required, so (a) transmission power is reduced, radio frequency utilization is efficient, and an economical equipment configuration is achieved. (b) If the subscriber specifies wide area service,
If necessary, the calling area can be specified when entering the calling number, resulting in an excellent wireless selective calling system that provides flexible and diverse services to subscribers.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram of an embodiment of the present invention. Second
The figure is a time chart of the frequency configuration transmitted from the same transmitter. FIG. 3 is a circuit diagram of the central control unit. FIG. 4 is a memory configuration diagram of one subscriber in the same subscriber data file. FIG. 5 is a transfer format diagram for transferring data from the central control device to each zone control device. Figure 6 is a system configuration diagram of Zone B. 1...Subscriber telephone, 2...General exchange network, 3...
... Central control device, 5A to 5E ... Zone control device, 10 ... Transmitter, 12 ... Input section, 13 ...
Control unit, 14...Voice recognition device, 15...Subscriber data file, 16...Time reference unit, 17...
Control console, 18...output section, 19...subscription registration section,
20...Calling grade department, 21...Calling area department,
22...Frequency specification section, 23...Call number section, 2
4...Frequency designation signal word, 25...Subscriber signal word, 26...Encoder section, 27...Semi-fixed delay circuit, 28...Connection line.

Claims (1)

[Claims] 1. A service area is divided into a plurality of calling zones, and at least one transmitter is disposed in each calling zone, and transmits a calling signal to selectively call receivers moving within the service area. and a central control unit that receives the above-mentioned paging signal from the general switched network and transfers it to the above-mentioned transmitter, wherein the central control unit has a fixed paging zone for each receiver. A storage means is provided for storing information as to whether the call is a local call only for a specific zone or a wide area call that can cover multiple calling zones, and the storage means stores information on whether the call is a local call only for a specific zone or a wide area call that can cover multiple calling zones, and the storage means stores information based on the area designation code added to the above call signal from the general exchange network. refer to the means;
Wireless selection characterized in that the paging receiver is provided with means for transmitting the paging signal to the transmitter in the paging zone corresponding to the area designation code added to the paging signal when the paging receiver is registered for wide area paging. Calling method.