JPS60143034A - Radio selective call system - Google Patents

Abstract

PURPOSE:To attain efficient utilization of a radio frequency by designating further a call area even for a receiver registered in a wide zone. CONSTITUTION:When a call signal from a subscriber telephone set 1 is inputted to a central controller 3, whether or not the corresponding receiver is registered or by which zone the receiveris to be called in case of registration is judged and a call signal is transferred to zone controllers 5A-5E of the call zone. The zone controllers 5A-5E encode the transferred call signal into a signal to be transmitted to a radio line and the encoded signal is transferred to each transmitter 10 in the own zone.

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 radio selective calling system, simply widening one zone has the disadvantage that the transmission power of the base station increases and the efficiency of radio channel utilization decreases. Furthermore, even in 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; generally, even if the called receiver is moving, the subscriber making the entire call does not know in what area the receiver is moving or located. Therefore, the present invention takes advantage of this to further designate the calling area even for receivers registered in wide area zones, thereby achieving economical use of radio frequencies. be.

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.

Also, if a particular receiver has a limited range of movement, the receiver can be designated to make 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 stores subscriber information from a subscriber telephone making a call in the storage means. A function is provided to register whether or not it is possible to input the calling area, and if the calling area is registered so that it can be specified by the subscriber's telephone, the area can be specified when inputting a call. It is characterized by doing the following.

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 connects to general switched network 2
It is connected to the central control device 3 via. 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. Zones B% C1D1 and E are zones with relatively low traffic in areas around large cities (hereinafter referred to as "regional zones"), and are zone control devices 5B15C and 5, respectively.
D 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 from the subscriber telephone IK, this ejection signal is input to the central control unit 3 via the general switching network 2. The central control device 3 determines whether or not the receiver corresponding to the received calling signal is registered, or if so, in which zone it should be called, and assigns the calling signal to the zone to be called. Transfer to zone controller.

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 IO 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, al, C2, C5, C4 indicate the signals transmitted from the transmission system to sea 7, b is zone B, e
d indicates a signal transmitted from the transmission system of zone C, and e indicates a signal transmitted from the transmission system of zone D, respectively. In addition, TSI and Te3 indicate all time slots, and time slot T
S2 further includes four sub-time slots 1' S 2
1 to T824.

Zone A has a high call volume and therefore has signals a1, C2, C3 and C4 transmitted from four transmission systems. Zone system shown in Figure 1 h! Each transmitter 10 controlled by the transmitter 10 is capable of multi-frequency switching, and transmits while switching the frequency at the transmission timing shown in FIG.

That is, in this embodiment, f is used for wide area service.
, ~f4 are designated as fL for regional services.
Four frequencies of l to fL4 are used, respectively. Furthermore, the transmission timing is roughly divided into two types of time slots of several minutes, TS1 and Te3.

In zone A where the call volume is large, a wide area service wave is sent out in time slot TS1 without using sub-time slots, and a local service wave is sent out in 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, time slot TS1
A regional service wave is assigned to the time slot TS
2 is divided into sub-time slots Te21 to T824, and four wide area service waves are transmitted within each time slot. In zone B, frequency f is transmitted at Te21 (FIG. 2b), and in zone C, frequency f2 is transmitted at TE01 (FIG. 2C). In zone D, frequency f at TE01
, is transmitted (d), and in zone E, frequency f4 is transmitted at TE01 (e). Similarly, frequencies are assigned to other sub-time slots so that the same frequency is not transmitted simultaneously.

As described above, by switching the frequency according to the time chart and transmitting signals in each zone, the same frequency is not transmitted at the same time between zones,
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 f is transmitted in all zones, a receiver to which frequency f is assigned can receive signals in all areas without having to specifically switch the frequency on the receiver. It is possible to do so.

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. Other inputs of this control section 13 are connected to a subscriber data file 15, a time reference section 16, and a city 1'' console 17. Further, the output of the control section 13 is connected to the output section 18, and the output of this output section 18 is connected to the sea 711i1J.
N devices 5A, 5B, 5C, 5D, and 5E.

That is, four of the output sections 18 are used for output to zone A, and output from zone B to zone E is performed by one output section 18 each.

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 system 3, and is used to control the transmission timing of the output unit 18. It is used to change the contents of memory and check answers, and is compatible with CRT terminals.

The interface between the general switched network 2 and the input unit 12 is an end-to-end method, and after only a line connection is made with the general switched network 2, the voice recognition device 14 uses the subscriber telephone l. i by voice from subscriber
You can receive a call number. The voice recognition device 14 includes a voice synthesizer, which synthesizes the received call number into voice, returns it to the subscriber's telephone, and receives a confirmation response from the subscriber. ](Foundation) Department 1
By transferring the discharge number to 3, you can avoid incorrect discharge.
You can enter the code.

The control unit 13 processes the calling number in accordance with the subscriber rn 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. Table 1 shows the contents of each item in the subscriber data memory.

Table 1 19 is a subscription registration section, 20 is a discharge blade section, 21 is a calling area section, 22 is a frequency designation section, and 23 is a discharge number section. This subscription registration section 19 is allocated one pit,
0” indicates that no registration has been made,
If it is "1", it indicates that the subscription has been registered.

One pit is assigned to the calling grade section 20, and "0" is assigned.
'' indicates that the receiver subscriber is a local area call registration subscriber, and ``1'' indicates that the receiver subscriber is a wide area call registration subscriber.

5 bits are assigned to the calling area part 21, and the numbers "0" to "
It is possible to indicate a value up to 7'', where ``1'' indicates a call to zone A and ``2'' indicates a call to zone B. Similarly, in the case of "5", it indicates the calling money to zone E. Further, the frequency designation section 22 represents the reception frequency classification of the receiver of the receiver subscriber. That is, 4 bits are assigned to the frequency designation section of this embodiment, and "1" to "4" correspond to frequencies f and to f4, respectively, and "11" to "14" correspond to frequencies fL+ 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 received calls, and charges Use as the basis of calculation.

With this configuration, when a calling number is input from the input unit 12, the control unit 13 reads the contents of the subscriber memory corresponding to the calling number from the subscriber data file 15, and processes the calling number according to the contents. First, assuming that the subscriber has been registered, if the call grade content is a local area call, the output unit 18 to which the call number should be transferred is determined based on the contents of the next subscribed area part and frequency part, 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, Table 2 shows an input example of the subscriber data file 15 according to the embodiment of the present invention.

Table 2 The input section consists of five 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 3 In this embodiment, when the last digit is "0", it indicates the registered area, when the last digit is "9", it indicates a call in all areas, and "1" to "5" In the case of , the ring tone for each area is shown separately.

Further, Table 4 shows an example of the data file of the subscriber data file 15 of this embodiment.

Table 4 According to Table 1, address 6578 is registered by the subscription registration department as “
1", so the subscription has been registered.

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. Further, since the frequency designation section of the receiver is "2", the frequency is [f2], and the number of call ports section is "5", indicating that the call has been called five times so far.

Furthermore, address 6579 has been subscribed since 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. Also, since the frequency specification part of the receiver is "11", the frequency is f
L, 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 will be made, but there was one call request due to an incorrect dial, etc. It is shown in the section.

As described above, 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, 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 transfers the time slot timing to each output section 18.

When this transmission timing is input, each output section 18 reads out 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 uses it as a calling signal to the zone control device of each zone. 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 transferred from the central control device 3 of this embodiment to each zone control device.

First, the frequency specification signal word 24 is transferred, followed by the subscriber signal words 25, which are sent out in sequence.

Each word is BOH (Bose-Ohaudhuri-
(Hocquengbe-m) code.

FIG. 6 is a diagram showing the configuration of the transmission system in zone B of this embodiment.

In terms of rotation pressure, zone B is composed of one zone control device 5B and four transmitters LO. Zone control device 5
B is a mountain, a tuda section 26 and four semi-fixed delay circuits 27
It is equipped with

The input of the encoder section 26 is connected to the output of the central control device 3. Further, the output of the semi-fixed delay circuit 27 is connected to each transmitter IO.

This semi-fixed delay circuit 27 corrects the difference in signal delay time that occurs for each connection line due to differences in the length and type of the connection line, and makes the phases of the modulated signals sent from each transmitter IO 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, when the encoder section 26 receives a frequency designation signal from the central control device 3, it sends a signal for designating the frequency to the transmitter IO. The transmitter IO has a function of switching and transmitting multi-frequency transmission waves, and has a zone control unit f5E.
The frequency is switched by a signal for specifying the frequency from. Next, the encoder unit 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 IO. 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.

Similar operations are performed in zone C1, zone D1, and zone E.

Although an example of an end-to-end method is shown as an interface between the input section 12 of the central control device 3 and the general switching network 2, it may also be realized using parallel connections or serial signals. .

As described above, according to the present invention, a paging signal is sent only to the area where a paging is necessary, so (a) transmission power is reduced, the wireless line is used more efficiently, and an economical equipment configuration is possible. (b) If the subscriber specifies a wide-area service, the calling area can be specified when entering the calling number if necessary, which provides the subscriber with flexible and diverse services. A wireless selective calling system is obtained.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram of an embodiment of the present invention. FIG. 2 is a time chart of the frequency structure 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 transfer from the same central control device to each zone MLJ control device. Figure 6 is a system configuration diagram of Zone B. l...Subscriber telephone, 2...-membrane switching network, 3...
Central control device, 58-5E...Zone control device, 10
...Transmitter, 12...Input section, 13...Control section,
14... Voice recognition device, 15... Subscriber data file, 16... Time reference section, 17... Control console, 18
... Output section, 19... Subscription registration section, 20... Calling grade section, 21... Calling area section, 22... Frequency specification section, 23... Number of calling ports, 24... Frequency specification signal word, 25...Subscriber signal word, 26...
Encoder section, 27... Semi-fixed delay circuit, 28...
contact line. Applicant's representative Patent attorney Naotaka Ide) f! iJ1
Illustration spell 2 Illustration 3 Illustration 4 Illustration 5 Child 6 Illustration

Claims (1)

[Claims] (1) Divide the service area into multiple calling zones,
At least one transmitter is arranged in each paging zone, and in a wireless selective calling method, receivers moving within the service area are selectively called by a paging signal sent from the transmitter, and the transmitter is coupled to the transmitter. and a central control unit that receives a paging signal from the general switched network, and this central control unit transmits to a designated paging zone, a pre-registered paging zone, or the entire area, based on an area designation code added to the paging signal. A wireless selective calling method characterized by transmitting the calling signal to the machine.