JPS58151134A - Mobile public telephone system - Google Patents

Abstract

PURPOSE:To prevent the loss of users and to offer convenience, by recognizing the period of charging to a toll call at the telephone set side and holding the line after the charging period is elapsed even if the line is deteriorated after the unit charge is deposited. CONSTITUTION:An exchange station processor 6 transmits the charging period at a charging period generator 7 to a call (toll call) from a telephone set 5. This charging period information is transmitted to a base station charging period decoder 9 and a base station processor 10. A mobile station 4 transfers the charging period to a mobile station processor 12. When the 1st charging is performed since the monitor of strength of received electromagnetic waves is stopped, even if the strength of the strength of waves is decreased to a specified value or below, the line is held. A radio device 11 of the base station 3 interrupts the line forcedly until the call is started when the call signal from the mobile station 4 is received and the reception level at the station 3 is specified level or below. When the call is started, the charging period signal is judged and the monitor of the reception input level is stopped. Thus, even if the reception input level is decreased to the specified value or below, the line is not interrupted forcedly.

Description

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, a telephone office side and a moving public telephone side are connected via a wireless line, and the public telephone side collects call charges according to billing information supplied from the telephone office side. This relates to a mobile public telephone system (for example, a car telephone system).

In a car telephone system in which a car is equipped with a mobile station and a public telephone, and the phone is connected to a central office via a wireless line via the mobile station to make a call, for example, a car while driving is in a tunnel. If the received signal strength dropped below a specified level due to a person entering the area, the line would be forcibly disconnected, making it impossible to make a call. However, this conventional system has the following disadvantages regarding collection of call charges.

When using a public phone, when you connect with the other party, you first charge a certain amount (for example, 100 yen for 100 yen) and then allow calls for a certain period of time. If you exceed the limit, a fixed fee will be charged and you will be able to make the first call. Now, if you make a call on your car phone, and immediately after connecting with the other party and collecting a fixed fee, the car enters a tunnel.The received signal strength will drop there, making it impossible to make a call, and the line will be forcibly disconnected. If the period is surprisingly short and the tunnel is removed after the charges are collected and before the next billing cycle arrives, if the @ line is not forcibly disconnected, calls will still be possible within the originally collected charges. Even though there was room, it was unreasonable to take a loss.

The present invention was made in order to improve the above-mentioned unreasonableness in billing in the conventional system, and therefore, an object of the present invention is to provide a mobile public telephone system that improves the above-mentioned unreasonableness regarding call charge collection. Our goal is to provide the following.

The main point of the configuration of the present invention is that the telephone station side and the moving public telephone side are connected via a wireless line, and the public telephone side collects call charges according to billing information supplied from the telephone station side. In the mobile public telephone system, the public telephone side examines the billing information supplied from the central office side, and
Find out whether the line connected to your armpit belongs to paid calls or free calls, and if it belongs to paid calls, what is the billing cycle?
Even if the line condition of the wireless 111 line deteriorates beyond the limit after the unit charge is collected as a call fee, the 117111m line is not forcibly disconnected at least until a predetermined billing cycle has elapsed.

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. In the figure, l is a switching center, 2 is a non-#[+11m control station,
3 is a wireless base station, 4 is a mobile station, and 5 is a public telephone.

Furthermore, the exchange 1 includes an exchange switch 8 and a processing device (C
PU) 6 and a billing cycle generator 7, and the radio base station 3 includes a radio device (transceiver) 11 and a processing unit (CPU).
10, a billing cycle decoder 9, and a transmitting/receiving antenna 15. On the other hand, the mobile station 4 has a radio device (transceiver) 13
, a processing unit (CPU) 12 , a billing cycle decoder 16 , and a transmitting/receiving antenna 14
is installed in cars.

Next, the operation will be explained. When a call is made from the public telephone 5, a line is set up from the public telephone 5 to the mobile station 4 to the radio base station 3 to the wireless network control station 2 to the switching center 1, and then from the switching center 1 to the other party's telephone (not shown). be called.

The switching center processing device 6 calculates a billing cycle for a call between the called party's telephone and the public telephone 5 (the time during which a call can be made based on the unit charge charged for - times) from various data, and calculates the billing cycle for the call between the called party's telephone and the public telephone 5 from various data, It instructs the controller to encode and transmit the calculated billing cycle. The billing cycle generated by the billing cycle generator 7G is transferred from the exchange 1 to the radio base station 3 via the radio network control station 2. The radio device 11 of the radio base station 3 modulates this billing cycle information and transmits it from the antenna 15, as well as to the base station billing cycle decoder 9. The base station charging cycle decoder 9 decodes the charging cycle and transfers it to the base station processing device 10. On the other hand, the mobile station 4 receives the radio waves sent from the base station 3 through the antenna 14 and decodes the charging cycle. The data is sent to the mobile station charging cycle decoder 16 in order to do so.

The mobile station charging cycle decoder 16 decodes the charging cycle and transfers it to the mobile station processing device 12.

As mentioned above, when the exchange 1 receives an outgoing signal from the mobile station 4, the processing unit f6 calculates the charging cycle according to the called party. 104, etc.),
The billing cycle information is encoded as all "0" (all bits constituting the code of the billing cycle information are set to 0) indicating that the call is toll-free. If the number is a toll-free number that rings again (for example, 110, 119, etc., the line will not be disconnected even if the caller hangs up, and the other party's police or fire department will call you for a certain period of time) In order to represent this as billing cycle information, it is encoded as an all-bi maximum value code (all bits of the code constituting the billing cycle information are set to 1).

By encoding as described above, two types of incoming calls are distinguished. In the case of incoming paid calls, the billing cycle is determined based on various conditions such as the location of the called party, whether the day is a Sunday or a holiday, etc.
Of course, it is possible to appropriately encode the code to an intermediate value.

The billing cycle information encoded in the billing cycle generator 7 as described above is transferred from the exchange 1 to the mobile station 4Q.The mobile station 4 receives the billing cycle information transmitted as the billing cycle signal. 2, and performs operations as shown in the flowchart of FIG.

FIG. 2 is a flowchart showing the operation of the mobile station when making a call.

See Figure 2. When a call is made from the public telephone 5 of the mobile station 4 and a communication path is established with the exchange 1, the mobile station 4 waits for the billing cycle signal sent from the exchange 1 as described above (step 101). The intensity of the received radio waves is monitored (step 102) until the billing cycle signal can be received, and when the level falls below a specified level, the station is forcibly disconnected (step 103).

When Sarah receives the billing cycle signal in step 101, it is determined whether the call is a normal paid call or an incoming toll-free call (including whether or not to call again) (step 104), and if it is an incoming toll-free call, When the level falls below the specified level, 1 forcibly disconnects (step 103
).

Also, by determining the billing cycle signal (step 104),
If it is determined that the incoming call is a paid call, then
)@Step 105 to determine whether all operations have been performed.
), until the first charge is made (that is, until the other party answers the phone and the call is available), the strength of the received radio waves is monitored (step 102"), and when the level falls below the specified level, the Target cutting (step 103)
do.

Furthermore, when the first charge is made (that is, when the other party answers the phone and a conversation is started), the intensity monitoring of the received radio waves is stopped (step 106)-f.

In other words, since monitoring of the strength of the received radio waves has stopped, the line will not be forcibly disconnected even if the strength of the received radio waves drops below the specified level, for example due to a car entering a tunnel. That's not to say there isn't.

The operation when a call is terminated by a mobile station will be explained with reference to the flowchart of FIG.

See Figure 3. The mobile station 4 always monitors the hook signal of the public telephone 5 during a call (step 201), and if it is not on-hook, monitors whether a call termination signal is received from the switching center 1 (step 202) and terminates the call. If a talk signal is received, the process moves to the call end flow (step 203).

On the other hand, the hook signal is monitored (step 201). If on-hook is detected, the billing cycle signal received before the start of the call is determined (step 204), and whether the call is an incoming paid call or an incoming call is detected. Even if there is a free call, if there is no call again, the process immediately moves to the call termination flow (step 203).

Also, by determining the billing cycle signal (step 204),
If the call is an incoming toll-free call with re-ringing, the call termination signal sent by exchange 1 is monitored (step 205).
If the call termination signal can be received, the process moves to the call termination flow (step 2o3).

Further, the call termination signal is monitored (step 205), and if the call termination signal cannot be received, the recall signal sent by the switching center 1 is monitored (step 206), and if the recall signal is received, the recall signal is sent. Flow (Step 20
Move on to 7). If the recall signal cannot be received, the end signal is monitored again (step 205).

Next, the operation of the base station 3 will be explained with reference to the flowchart shown in FIG.

Please refer to FIG. When the radio device 11 of the base station 3 receives a transmission signal from the mobile station 4, it monitors the start of the call (when the called party answers) (step 301), and until the call starts, the base station Monitor the reception input level at 3 (
Step 302) L: Forcibly disconnect the line when the level falls below the specified level (Step 303)
. When a call is started, the billing cycle signal is determined (step 304), and if it is an incoming paid call, monitoring of the reception input level is stopped (step 305). In other words, since monitoring of the received input level is stopped, even if the received input level drops below a specified level, such as when a car enters a tunnel, the line will not be forcibly disconnected.

In addition, in the case of an incoming toll-free call, the reception input level at the base station 3 is monitored (step 306), and when the level falls below a specified level, the connection is forcibly disconnected (step 303).
do.

As explained above, in the present invention, (1) the mobile station stops monitoring the strength of received radio waves after the charge is made at the public telephone, or (il) the reception at the base station is stopped when a call is started. By stopping the monitoring of the radio wave strength, even if the strength of the received radio waves temporarily deteriorates after billing (such as when a mobile object enters a tunnel, etc.), the service will be forcibly maintained for the duration of the call for the billed charges. This has the advantage that the call does not have to be disconnected.

Furthermore, as explained above, by making it possible to distinguish between the same incoming toll-free call by using different billing cycle information depending on whether there is a recall or not, it is possible to quickly recall and end the call. In addition, by making it possible to distinguish between incoming toll-free calls and incoming paid calls by using different billing cycle information, it is possible to rationally continue or stop monitoring the received input level at mobile stations and base stations. It has the advantage of being possible.

Furthermore, by encoding the charging cycle signal for incoming toll-free calls as all bits as 10# or "11," the advantage is that it is possible to distinguish between incoming toll-free calls and incoming paid calls using a simple circuit. has.

In addition, the strength of received radio waves is constantly monitored for calls to pay-to-call stations before charges are made, and for calls to toll-free stations, and normal forced disconnection is performed based on the monitoring results, allowing quick termination of calls. becomes possible.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a flowchart showing the operation of the mobile station when making a call in FIG. 1, and FIG. FIG. 4 is a flowchart showing the operation of the base station in FIG. 1. Code explanation 1...Switching center, 2...Radio line control station, 3...Koku Mugan base station, 4...Koku mobile station, 5...Koku public 1 talk machine, 6... ...Switching center processing device, 7...
・Charging cycle generator, 8...Exchange switch, 9
...Base station line gold station period decoder, 10...
Base station processing device, 11...Radio device, 12...
...Mobile station processing device, 13...Mountain mobile station radio device, 1
4...Mobile station antenna, 15...Base station antenna, 16...Mobile station billing cycle decoder agent Patent attorney Akio Namiki Patent attorney Kiyoshi Matsuzaki

Claims (1)

[Claims] 1) In a mobile public telephone system in which the telephone station side and a mobile public telephone m1ll are connected via a wireless line, and the public telephone side collects call charges according to billing information supplied from the telephone station side, The public telephone side examines the billing information supplied from the telephone office side, and also learns whether the connected line belongs to paid calls or free calls, and if it belongs to paid calls, what the billing cycle is, After a unit charge is collected as a call charge, even if the line condition of the wireless line deteriorates beyond the limit, the line is not forcibly disconnected until at least a predetermined 0 charging cycle has elapsed. Telephone method.