JP2011129987A - Public telephone service system, public telephone service method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a public telephone service system, a public telephone service method, and a program capable of supplying public telephone services by an IP (Internet Protocol) network. <P>SOLUTION: An application server 5 in a network includes: a call connection signal controller 511 for receiving a call connection signal and for transmitting the call connection signal to a subscriber telephone 7 through a call control server; a frequency and collection period determiner 521 for determining a frequency and a collection period which are a charge collected by a public telephone at one time, using a billing rate, when receiving the call connection signal; a response collection instruction signal generator 522 for transmitting a collection instruction signal appended with charging information containing the determined frequency as a reply signal to a public telephone 2 through a subscriber server 4A; and a periodic collection instruction signal generator 523 for generating a collection instruction signal established with the charging information containing the determined frequency according to the determined collection period, and for transmitting to the public telephone 2 through the subscriber server 4A. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a public telephone service system, a public telephone service method, and a program.

  A conventional public switched telephone network (PSTN) analog / digital public telephone service (see Non-Patent Document 1) provides various functions in a GC (Group Unit Center) exchange, and the GC exchanges are mutually connected. This is achieved through communication.

  The functions provided in the GC switch are different depending on whether the public telephone service is analog / digital. The functions provided by the GC switch in the analog public telephone service include, for example, a billing function, a CDR (Call Detail Record) reflecting function of the storage frequency, a public free function, a priority control function, a caller ID notification function, a connection restriction function , A call restriction function, and an emergency button press detection function. Examples of functions provided by the GC exchange in the digital public telephone service include a charging function, a public free function, a priority control function, a caller number notification function, a connection restriction function, a transmission restriction function, and a DT first function.

  The public telephone (analog / digital) service by the GC exchange provided with the above-described functions is performed according to the procedure shown in FIG. A sequence diagram of the analog public telephone service corresponding to FIG. 18 is shown in FIG. 19, and a sequence chart of the digital public telephone service corresponding to FIG. 18 is shown in FIG.

  First, 10 yen coins, 100 yen coins are inserted into a public telephone, or a card is inserted, and the caller dials (step S701). Next, the originating side GC exchange identifies whether it is a number band in which a call is possible (connection permission determination) (step S702). If the calling side GC exchange is in a number band where a call can be made, the originating side GC exchange proceeds to connection processing. Next, the calling side GC exchange sets the reason for non-notification of the caller number as “not possible because of a public telephone” (step S703). Next, when the caller ID non-notification reason is “not available for public telephones”, the called side GC exchange notifies the terminal side of “C” without notifying the caller ID (step S704).

  Next, when receiving the response signal from the destination GC exchange, the originating side GC exchange extracts the accounting index (MBI) according to the accounting ground (KA) with the destination GC exchange, and sends the accounting pulse (response) to the terminal side. A storage signal is transmitted (step S705). Here, the coin determination (10 yen, 100 yen, card storage) is identified when the charging pulse (response storing signal) is transmitted, and reflected in the charging process. Cut when no coin. In the case of a digital public telephone, the originating side GC exchange determines the input frequency by receiving DSS1 (SETUP), and notifies the initial addition frequency when receiving a response signal from the destination side GC exchange. Thereafter, a storage instruction (storage frequency and call time) corresponding to the charging index (MBI) according to the charging destination (KA) with the destination GC exchange is issued to the calling terminal (step S705 in FIG. 20).

  Next, the originating side GC exchange sends a periodic storage signal to the terminal side in accordance with the storage cycle (step S706). In the case of a digital public telephone, a storage instruction is transmitted and a storage result is received (step S706 in FIG. 20). Next, the originating side GC exchange generates call information at the time of disconnection (step S707). Thereby, the public telephone (analog / digital) service is terminated.

“Public Phone Information”, [online], East Nippon Telegraph and Telephone Corporation, [December 7, 2009 search], Internet, <URL: http://www.ntt-east.co.jp/ptd/>

  As described above, the conventional public telephone service is realized by the PSTN network, and is not realized by the IP network (hereinafter sometimes referred to as the IP network). In other words, the IP network technology does not have the charging function, the CDR reflection function for the storage frequency, etc., which are provided in the GC exchange, and there is no field or sequence for identifying information. Could not be realized.

  The present invention has been made in view of the above problems, and an object thereof is to provide a public telephone service system, a public telephone service method, and a program capable of realizing a public telephone service over an IP network.

  In order to achieve the above object, the public telephone service system according to the present invention is configured such that an IP conversion device, a call control server, and an application server in an IP network communicate with each other data including a telephone number. A public telephone service system that enables a telephone call from a public telephone connected to a network to another telephone, wherein a dial signal transmitted from the public telephone is converted into a call connection signal of the IP network, and the call A dial signal conversion unit that transmits to the application server via the control server; and a storage instruction signal of the IP network that is transmitted from the application server and instructs the public telephone to be charged, and is converted into a storage signal of the telephone network, With respect to the storage signal conversion unit to be transmitted to the public telephone and the storage instruction signal An IP conversion comprising: a storage result signal converting unit that converts a storage result signal transmitted from the public telephone to a storage result signal of an IP network and transmits the stored signal to the application server via the call control server Receiving the call connection signal from the device and the IP conversion device connected to the public telephone that is the transmission source of the dial signal, and further transmitting the call connection signal to the other telephone via the call control server. When a call connection signal control unit to transmit, a storage unit that stores a charge rate that is a call time per unit charge based on a distance between outgoing and incoming call points and a time zone, and the call connection signal are received, The frequency storage period determining unit that determines the frequency and storage period, which are charges stored at a time by the public telephone, using the billing rate, and the other connection power to the call connection signal. When the response signal indicating that the call connection is successful is received from the telephone, the response storage is transmitted to the public telephone via the call control server as the storage instruction signal to which the charging information including the determined frequency is added to the response signal. A signal storing unit that generates the storing instruction signal in which the charging information including the determined frequency is set according to the determined storing period, and transmits the storing instruction signal to the public telephone via the call control server When the storage result signal is received from the IP converter connected to the public telephone that is the transmission source of the signal that notifies the storage result, if the charge is stored, the line is maintained and the charge is charged. An application server including a storage result determination unit that disconnects the line if it cannot be stored is characterized.

  In addition, the public telephone service method according to the present invention provides another method in which an IP conversion device, a call control server, and an application server in an IP network communicate data with each other from a public telephone connected to the IP network. A public telephone service method used in a public telephone service system that enables a telephone call to a telephone, wherein the IP converter converts a dial signal from the public telephone into a call connection signal of the IP network, Transmitting the call connection signal to the application server via the call control server; and the application server stores the distance between the outgoing and incoming points stored in the storage unit, and the unit charge per unit fee. Frequency that is the charge that the public telephone stores at one time using the billing rate that is the talk time And a step of determining a storage cycle, a step of transmitting to the other telephone set as a call destination via the call control server, and a response signal to the call connection signal from the other telephone set via the call control server. And receiving the billing information including the determined frequency to the response signal received from the other telephone, and as a storage instruction signal for instructing the public telephone to charge the public telephone via the call control server Transmitting to the IP conversion device connected to the telephone; and the IP conversion device converts the storage instruction signal received from the application server into a response storage signal, and then transmits the response storage signal to the public telephone. A step of receiving storage result information for the signal, and a storage result signal in which the storage result information received from the public telephone is set Transmitting to the application server via the call control server, and a storage instruction signal in which the application server sets charging information including the determined frequency in accordance with the determined storage cycle, And transmitting to the public telephone set after the IP conversion apparatus converts the storage instruction signal received from the application server into a periodic storage signal. Receiving storage result information for the periodic storage signal, and transmitting a storage result signal in which the storage result information received from the public telephone is set to the application server via the call control server. It is characterized by performing.

  By doing in this way, in the IP network, the application server determines the frequency and the storage cycle, and transmits to the public telephone as a storage instruction signal with charging information including the frequency determined in the response signal. By transmitting a storage instruction signal in which charging information including the determined frequency is set according to the storage cycle, the public telephone can be charged. Therefore, the public telephone service system and public telephone service method according to the present invention can realize a public telephone service that requires charging processing in the IP network.

  Further, in the public telephone service system according to the present invention, the frequency storage cycle determination unit receives a call signal including a frequency different from the frequency, and newly determines a storage cycle and frequency from the call signal. It is characterized by that.

  Further, in the public telephone service method according to the present invention, the application server uses a billing rate that is a call time per unit charge based on a distance between call destinations and a time zone, which is stored in the storage unit. Then, in the step of determining the frequency and the storage cycle that are the charges that the public telephone stores at a time, the application server receives a call signal that includes a frequency different from the frequency, and generates a new one from the call signal. The storage period and frequency are determined.

  In this way, when a call is made at a charge rate different from the charge rate stored in the storage unit of the application server, the charge rate applied to the call is received from the call destination, and the frequency and frequency are set at the new charge rate. The storage cycle is determined, and the billing process of the public telephone can be performed with the newly determined frequency and storage cycle. Here, when calling at a charging rate different from the charging rate stored in the storage unit of the application server, for example, from a public telephone, a telephone managed by a person different from the IP network and the administrator of the IP network This is when a call is made via the network. In such a case, it may be difficult to manage the charging rate of the telephone network managed by a different person. Even in such a case, the charging rate of the telephone network managed by a different person is received and charged by the public telephone. Processing can be performed. Therefore, the public telephone service system and method according to the present invention can realize a public telephone service and a public telephone service method that require a charging process in the IP network even in a call where the charging rate is not managed.

  In the public telephone service system according to the present invention, the application server or the IP conversion apparatus receives the call connection signal from the IP conversion apparatus connected to the public telephone that is the transmission source of the dial signal. And a calling number notifying unit for setting a parameter for disabling caller ID in the call connection signal.

  Thus, by providing a calling number notification unit that sets a parameter for disabling caller number notification in the call connection signal, the public telephone service system is unable to notify the caller number from the call connection signal parameter. Can be judged. Thus, the public telephone service system according to the present invention can realize a public telephone service that hides the telephone number of the caller's public telephone on the caller's telephone.

  Further, in the public telephone service system according to the present invention, the call control server or the application server identifies whether or not the telephone number set in the call connection signal in the previous period is a callable number band. In the case of a simple number band, it further includes a connection restriction unit that shifts to connection processing.

  In this way, the public telephone service system is provided with a connection restriction unit that identifies whether the number band is callable and shifts to connection processing if the number band is callable. You can restrict connections to existing phone numbers. Therefore, the public telephone service system according to the present invention can realize a public telephone service with a limited connection destination.

  Further, in the public telephone service system according to the present invention, the IP converter, the call control server, or the application server sets priority control parameters in which a caller terminal indicates a public telephone in a parameter of the call connection signal. When the IP conversion device, the call control server, and the application server include the priority control unit, a call connection signal in which a parameter indicating the public telephone is set is preferentially processed. It is characterized by that.

  In this way, by providing a priority control unit that sets a parameter indicating a public telephone and processes a call connection signal with priority by the caller terminal, the public telephone service system allows outgoing calls from the public telephone to The line can be connected with priority over outgoing calls. Therefore, the public telephone service system according to the present invention can realize a public telephone service that gives priority to public telephone calls.

  In addition, the public telephone service system according to the present invention is further characterized in that the application server further includes a public free portion that does not transmit the storage instruction signal to the public telephone by receiving a non-billing instruction. .

  Thus, by providing the public free portion, the public telephone service system can stop the storage instruction to the public telephone. The case where the storage in the public telephone is stopped is, for example, the case where the use of the public telephone is concentrated at the time of a disaster and the safe provided in the public telephone is filled with coins. In such a case, it is necessary to avoid that the public telephone cannot be used because the billing process cannot be performed. Therefore, calls from public telephones are made free of charge and charges are not stored from coins and prepaid cards. Therefore, the public telephone service system according to the present invention can realize a public telephone service that can temporarily stop the billing process.

  In the public telephone service system according to the present invention, when the public telephone is an analog public telephone, the IP conversion device, the call control server, or the application server is pressed by an emergency button provided on the public telephone. And an emergency button transmitter that does not transmit a dial signal other than making a call to a number that allows an emergency call.

  As described above, by providing the emergency button transmission unit, the public telephone service system presses the emergency button provided on the analog public telephone, and allows emergency calls (for example, “110”, “118”, “119”). ”Etc.), no-coin transmission can be permitted. Therefore, the public telephone service system according to the present invention can realize a public telephone service that does not perform billing processing while limiting connection destinations.

  The public telephone service program according to the present invention causes the IP conversion apparatus, call control server, and application server to execute the public telephone service method.

  By doing so, the program according to the present invention can realize a public telephone service that requires charging processing in the IP network.

  According to the present invention, a public telephone service can be realized over an IP network.

1 is a configuration diagram of a public telephone service system according to a first embodiment of the present invention. FIG. It is a functional lineblock diagram of (a) public telephone (b) IP conversion device (originating side) concerning a 1st embodiment. It is a functional block diagram of the subscriber server (calling side) which concerns on 1st Embodiment. It is a function block diagram of the network application server which concerns on 1st Embodiment. It is a functional lineblock diagram of (a) relay server (b) subscriber server (destination side) concerning a 1st embodiment. It is a functional block diagram of (a) IP converter (destination side) and (b) subscriber telephone which concern on 1st Embodiment. It is a sequence diagram (first half) of the public telephone service system which concerns on 1st Embodiment. It is a sequence diagram (second half) of the public telephone service system according to the first embodiment. It is a block diagram of the public telephone service system which concerns on 2nd Embodiment of this invention. It is a functional block diagram of (a) PSTN-GW (b) relay switch (IGS / IC) which concerns on 2nd Embodiment. It is a functional block diagram of the subscriber network switch (GC) which concerns on 2nd Embodiment. It is a sequence diagram (the first half) of the public telephone service system which concerns on 2nd Embodiment. It is a sequence diagram (second half) of the public telephone service system according to the second embodiment. It is a functional block diagram of an IP conversion device (originating side) having functions unique to analog and digital public telephone service systems. It is a sequence diagram in the case where a charging control unit is deployed in an in-network application server. It is a sequence diagram in the case of deploying a charging control unit on a subscriber server (calling side). It is a sequence diagram in the case of deploying a charging control unit in the IP conversion device (originating side). It is a block diagram of a public telephone service system using a conventional PSTN network. It is a sequence diagram of an analog public telephone service system using a conventional PSTN network. It is a sequence diagram of a digital public telephone service system using a conventional PSTN network.

<< Configuration of Public Telephone Service System According to First Embodiment >>
(Overview)
FIG. 1 is a configuration diagram showing a public telephone service system 1 according to the first embodiment of the present invention. The public telephone service system 1 includes a public telephone 2, an IP conversion device 3A (calling side), an IP conversion device 3B (calling side), a subscriber server 4A (calling side), a subscriber server 4B (calling side), a network application Server 5 (hereinafter sometimes referred to as “intranet AS5”), relay server 6, subscriber telephone 7, telephone networks 8A and 8B (hereinafter sometimes collectively referred to as “telephone network 8”), IP network 9 It is configured with. Hereinafter, devices constituting the public telephone service system 1 will be described.

(Public phone, subscriber phone)
The public telephone 2 as an immediate charge collecting telephone is a telephone which is installed on a street or the like and pays a fee using a coin, a prepaid card or the like. The subscriber telephone 7 as a non-immediate charge collection telephone is a telephone that is installed in a general household and pays a fee without using a coin, a prepaid card or the like.

  The public telephone 2 may be either an analog public telephone or a digital public telephone. Hereinafter, the public telephone 2 includes an analog public telephone and a digital public telephone.

  The public telephone service system 1 when an analog public telephone is used as the public telephone 2 is referred to as an analog public telephone service system (hereinafter sometimes referred to as an analog public telephone SS). The public telephone service system 1 when a digital telephone is used as the public telephone 2 is called a digital public telephone service system (hereinafter sometimes referred to as a digital public telephone SS). Hereinafter, the public telephone service system 1 (hereinafter sometimes referred to as a public telephone SS) includes an analog public telephone service system and a digital public telephone service system.

(IP converter)
The IP conversion devices 3A and 3B (hereinafter sometimes collectively referred to as the IP conversion device 3) use a signal used in an analog line or a signal used in an ISDN (Integrated Services Digital Network) line as an IP protocol (Internet Protocol). ) Is a device that converts to a format conforming to The IP conversion device 3 includes, for example, a CPU, a memory, a peripheral circuit, an HDD, and the like.

(Subscriber server, relay server, AS in the network)
The subscriber servers 4A and 4B (hereinafter sometimes collectively referred to as the subscriber server 4) as call control servers are servers that perform subscriber call processing. The relay server 6 as a call control server is a server that performs relay call processing. The in-network AS 5 is an application server for providing a public telephone service. The subscriber server 4, the relay server 6, and the network AS 5 include, for example, a CPU, a memory, a peripheral circuit, an HDD, and the like.

(Phone network)
The telephone network 8 is an analog or digital telephone network. Examples of the analog telephone network include a subscriber line (telephone line). An example of a digital telephone network is ISDN (Integrated Services Digital Network).

(IP network)
The IP network 9 is a LAN (Local Area Network), a WAN (Wide Area Network), or the like, and is configured by one or both of wired and wireless, and realizes data communication. In the IP network 9, communication is performed according to the IP protocol.
Above, description of the structure of the public telephone service system 1 which concerns on 1st Embodiment is complete | finished.

<< Function of Public Telephone Service System According to First Embodiment >>
Next, in the public telephone service system 1 according to the first embodiment, each device has various functions in order to realize the public telephone service. In FIGS. 2-6, the functions of each device comprises to as "○○ section". Each function is realized by loading a program into a memory (not shown) and executing it using a CPU (not shown). Hereafter, each function with which the public telephone service system 1 which concerns on 1st Embodiment is provided is demonstrated. In the first embodiment, it is assumed that call control is performed using SIP (Session Initiation Protocol) standardized as RFC3261.

  First, functions provided in all apparatuses will be described. A communication unit (not shown) is provided in each device of the public telephone 2, the IP conversion device 3, the subscriber server 4, the network AS 5, the relay server 6, and the subscriber telephone 7, and transmits and receives data. The communication unit transmits and receives data via an adapter device for LAN provided in each device, TA for ISDN communication line, modem, or the like (none of which is shown). In the following, when there is a description that another “XXX unit” transmits data, this means that data is being transmitted via the communication unit.

<Functions provided by the public telephone 2>
Next, with reference to FIG. 2 (a), illustrating the function of the public telephone 2 has. The public telephone 2 includes a call unit 21, a call control unit 22, and a billing unit 23. Hereinafter, each function with which the public telephone 2 is provided is demonstrated.

  The call unit 21 inputs voice or the like via a microphone and sends it to the IP conversion device 3A, or receives a tone (for example, a ringing tone (hereinafter sometimes referred to as RBT)) or voice received from the IP conversion device 3A. Is output through a speaker to realize a call.

  The call controller 22 sends a dial signal to the IP conversion device 3A when the caller presses the dial.

  The billing unit 23 accepts coins or cards from an insertion slot (not shown). When receiving a response storage signal instructing charging sent from the IP conversion device 3A and a periodic storage signal (hereinafter sometimes referred to as “accommodation signal”), it is received from an inserted coin or a card. Store the applicable charges.

<Functions Provided by IP Conversion Device 3A>
Next, with reference to FIG. 2 (b), illustrating the functions of the calling side IP converter 3A. The IP conversion device 3A includes a call unit 31A, a call control unit 32A, a charging unit 33A, and a protocol conversion unit 34A. The protocol converter 34A includes a dial signal converter 341A, an RBT converter 342A, a stored signal converter 343A, and a stored result signal converter 344A. Furthermore, the IP conversion device 3A can include a priority control unit 82 and a public free unit 83. Hereinafter, each function with which IP conversion apparatus 3A is provided is demonstrated.

  The call unit 31A converts the voice transmitted from the public telephone 2 into a digital signal and transmits it to the IP conversion device 3B. Further, the voice transmitted by the subscriber telephone 7 is converted into an analog signal and transmitted to the public telephone 2.

  The call control unit 32A receives a dial signal transmitted from the public telephone 2. In addition, a tone (for example, RBT) is transmitted to the public telephone 2.

  The accounting unit 33A sends a storage signal storing charges from coins or cards to the public telephone 2.

  The protocol conversion unit 34A converts a signal used on an analog line or a signal used on an ISDN line into a format conforming to the IP protocol. Hereinafter, the function of the protocol conversion unit 34A will be described for each type of signal to be converted.

  The dial signal conversion unit 341A converts the dial signal transmitted from the public telephone 2 into an INVITE request as a call connection signal of the IP network 9, and transmits it to the subscriber server 4A.

  The RBT conversion unit 342A converts 180Ringing (hereinafter sometimes referred to as “180”) transmitted from the subscriber server 4A into an RBT of the telephone network 8A and transmits the RBT to the public telephone 2.

  The storage signal conversion unit 343A transmits a response storage instruction signal and a periodic storage instruction signal (hereinafter collectively referred to as a “storage instruction signal”) transmitted from the subscriber server 4A and instructing the public telephone 2 to charge. 200 OK or INFO is converted into a signal stored in the telephone network 8 A and sent to the public telephone 2.

  In response to a storage instruction signal for instructing billing to the public telephone 2, the storage result signal conversion unit 344A sends a signal for notifying the result of storage transmitted from the public telephone 2 as an ACK, Or it converts into 200OK and transmits to the subscriber server 4A.

  The priority control unit 82 connects the line with priority given to outgoing calls from the public telephone 2 over outgoing calls from other general telephones (not shown). The priority control unit 82 sets “payphone” as a parameter indicating that the caller terminal indicates the public telephone 2 in the cpc parameter of the INVITE request as the call connection signal. Then, the priority control unit 82 determines whether the call originates from the public telephone 2 based on whether or not “payphone” is set in the cpc parameter in the device such as the subscriber server 4, and sets “payphone” in the cpc parameter. Is set, the call connection signal is preferentially transmitted by each device. Further, a control instruction that does not accept outgoing calls other than public telephones and telephones connected with priority may be issued from the operation and maintenance terminal. The priority control unit 82 can be deployed in the subscriber server 4, the network AS 5, and the relay server 6 in addition to the IP conversion device 3 (see FIGS. 3 to 6 to be described later).

  In order to prevent the public telephone 2 from being unusable when the use of the public telephone is concentrated during a disaster and the safe provided in the public telephone 2 is filled with coins, Make calls free and do not collect charges from coins or prepaid cards. By receiving a non-billing instruction from an operation and maintenance terminal (not shown), the public free unit 83 stops the storage signal instructing charging, which is transmitted to the public telephone 2 by the charging unit 33A. Thereby, it is possible to make a call from the public telephone 2 without collecting the public telephone 2. The public free unit 83 can be deployed in the subscriber server 4A (see FIG. 3) and the in-network AS5 (see FIG. 4) in addition to the IP conversion device 3A.

<Functions provided to subscriber server 4A>
Next, with reference to FIG. 3, the functions of the subscriber server 4A of the caller. The subscriber server 4A includes a protocol control unit 41A. The protocol control unit 41A includes a call connection signal control unit 411A, a call signal control unit 412A, a response signal control unit 413A, a response storage instruction signal control unit 414A, and a period storage instruction signal control unit 415A. Composed. Furthermore, the subscriber server 4A can include a priority control unit 82, a public free unit 83, and a connection restriction unit 84. Hereinafter, each function with which subscriber server 4A is provided is explained. Note that the priority control unit 82 and the public free unit 83 have been described in terms of the functions provided in the IP conversion device 3A (see FIG. 2B), so description thereof will be omitted.

  The protocol control unit 41A performs call control between the caller and the receiver. Hereinafter, the functions of the protocol control unit 41A will be described separately for the types of requests and responses.

  The call connection signal control unit 411A transfers the INVITE request as a call connection signal transmitted from the IP conversion device 3A to the intra-network AS5. In addition, the INVITE request as the previously transferred call control signal transmitted from the network AS 5 is transferred to the relay server 6.

  The call signal control unit 412A transfers 180Ringing as a call signal transmitted from the relay server 6 to the intra-network AS5. Further, the 180 Ringing as the call signal transferred earlier transmitted from the intra-network AS is transferred to the IP conversion device 3A.

  The response signal control unit 413A transfers 200OK as a response signal transmitted from the relay server 6 to the intra-network AS5.

  The response storage instruction signal control unit 414A transfers 200OK as the response storage instruction signal transmitted from the network AS5 to the IP conversion device 3A. Also, the ACK as the storage result signal transmitted from the IP conversion device 3A is transferred to the network AS5.

  The periodic storage instruction signal control unit 415A transfers INFO transmitted from the intranet AS5 as a periodic storage instruction signal to the IP conversion device 3A. Also, 200OK as a storage result signal transmitted from the IP conversion device 3A is transferred to the intra-network AS5.

  The connection restriction unit 84 is a function that restricts the connection of telephone numbers whose connection from the public telephone 2 is restricted. The connection restriction unit 84 determines whether or not to restrict the connection by identifying whether or not the number set in the INVITE request as the call connection signal is a number band in which a call can be made. The connection restriction unit 84 shifts to a connection process if the number band is available for a call. The connection restriction unit 84 can be provided in the subscriber server 4A (see FIG. 3) and the network AS5 (see FIG. 4 described later).

<Functions of AS5 in the network>
Next, with reference to FIG. 4, functions provided in the intranet AS5 will be described. The intranet AS5 includes a storage unit 50, a protocol control unit 51, and a charging control unit 52. Storage unit 50 is configured to include a billing rate information 501, and CDR502. The protocol control unit 51 includes a call connection signal control unit 511 and a call signal control unit 512. The charging control unit 52 includes a frequency storage cycle determination unit 521, a response storage instruction signal generation unit 522, a cycle storage instruction signal generation unit 523, a storage result determination unit 524, and a CDR reflection unit 525. Yes. Furthermore, the network AS 5 can include a calling number notification unit (caller number notification unit) 81, a priority control unit 82, a public free unit 83, and a connection restriction unit 84. Hereinafter, each function with which AS5 in a network is provided is demonstrated. The priority control unit 82 and the public free unit 83 will be described in terms of functions provided in the IP conversion device 3A (see FIG. 2B), and the connection server 84A (see FIG. 3) for the connection restriction unit 84. Since it explained by the function with which it has, explanation is omitted.

  The storage unit 50 is configured by an HDD (Hard Disk Drive) or the like, and stores various data as, for example, a database. Hereinafter, the data included in the storage unit 50 will be described separately for each type of information to be stored.

  The billing rate information 501 stores the distance between outgoing and incoming call points, whether it is a weekday, a holiday or a holiday, and the call time per unit charge based on the time zone (hereinafter referred to as “billing rate”).

  In the CDR 502, the frequency stored for a call using the public telephone 2 is recorded.

  The protocol control unit 51 transfers a signal used for call control between the caller and the receiver. Hereinafter, the function of the protocol control unit 51 will be described separately for each type of request and response.

  The call connection signal control unit 511 returns an INVITE request as a call connection signal transmitted from the subscriber server 4A to the subscriber server 4A.

  The call signal control unit 512 returns 180 Ringing as a call signal transmitted from the subscriber server 4A to the subscriber server 4A.

  The billing control unit 52 controls the entire billing process such as a billing process instruction for the public telephone 2. Hereinafter, the function of the charging control unit 52 will be described.

  The frequency storage cycle determination unit 521 calculates a corresponding billing rate of the billing rate information 501 based on the distance between the transmission and reception points and the date and time. Next, the frequency storage cycle determination unit 521 uses the calculated charging rate as a cycle for storing charges from coins and prepaid cards inserted into the public telephone 2 (hereinafter referred to as “storage cycle”). A charge to be stored (hereinafter referred to as “frequency”) is determined. Here, in the determination of the storage cycle and frequency, the type (10 yen or 100 yen unit) that can be stored depending on the type of the public telephone 2 or the like is considered. That is, some public telephones 2 can be stored only in units of 10 yen, and some can be stored in units of 100 yen, and need to be considered in determining the storage period and frequency.

  When the response storage instruction signal generation unit 522 receives 200 OK as a response signal indicating that the call connection is successful from the subscriber server 4A, the response storage instruction signal generation unit 522 includes the accounting information including the frequency determined by the frequency storage cycle determination unit 521 in the response signal. And 200OK as a response storage instruction signal is returned to the subscriber server 4A.

  The periodic storage instruction signal generation unit 523 generates INFO as a periodic storage instruction signal in which charging information including the frequency determined by the frequency storage cycle determination unit 521 is set according to the storage cycle determined by the frequency storage cycle determination unit 521. It transmits to the subscriber server 4A.

  When the storage result determination unit 524 receives a storage result signal for the storage instruction signal (response storage instruction signal, periodic storage instruction signal) from the subscriber server 4A, the storage result determination unit 524 maintains the line if the charge is stored. If it is not stored, the line is disconnected.

  The CDR reflection unit 525 reflects the stored frequency in the CDR 502 when receiving a storage result signal for the storage instruction signal (response storage instruction signal, periodic storage instruction signal) from the subscriber server 4A. Here, when the public telephone 2 is a coin / card public telephone 2 (hereinafter referred to as an over-the-counter public telephone) placed in a store or the like, the CDR reflecting unit 525 reflects the frequency stored from the coin in the CDR 502. However, the frequency stored from the card is not reflected in the CDR 502. That is, the store charge may be collected by the store person, and then the collected charge is handed over to the store pay phone owner. At that time, since the charge given to the owner may be the frequency stored from the coin, such a process is performed.

  When the caller is a public telephone, the caller ID notification unit 81 hides the telephone number as the caller ID of the caller's public telephone 2 on the caller telephone. The calling number notifying unit 81 sets the display impossibility reason “C” that the type of the caller terminal is a public telephone in the PAI header of the INVITE request as a call connection signal. Then, in the apparatus such as the subscriber server 4, it is determined whether or not the call is from a public telephone depending on whether or not “C” is set in the PAI header, and if “C” is set in the PAI header, Disable caller ID notification. The calling number notification unit 81 can be provided in the IP conversion device 3B (see FIG. 6a described later).

<Functions included in relay server 6>
Next, with reference to FIG. 5 (a), illustrating the function of the relay server 6 is provided. The relay server 6 includes a protocol control unit 61. The protocol control unit 61 includes a call connection signal control unit 611, a call signal control unit 612, and a response signal control unit 613. Further, the relay server 6 can include a priority control unit 82. Hereinafter, each function with which the relay server 6 is provided is demonstrated. The priority control unit 82 has been described in terms of the functions provided in the IP conversion device 3A (see FIG. 2B), and thus the description thereof is omitted.

  The protocol control unit 61 transfers a signal used for call control between the caller and the receiver. Hereinafter, the functions of the protocol control unit 61 will be described separately for the types of requests and responses.

  The call connection signal control unit 611 transfers the INVITE request as a call connection signal transmitted from the subscriber server 4A to the subscriber server 4B.

  The call signal control unit 612 transfers 180 Ringing as a call signal transmitted from the subscriber server 4B to the subscriber server 4A.

  The response signal control unit 613 transfers 200OK as a response signal transmitted from the subscriber server 4B to the subscriber server 4A.

<Functions provided to subscriber server 4B>
Next, with reference to FIG. 5B, functions provided in the called subscriber server 4B will be described. The subscriber server 4B includes a protocol control unit 41B. The protocol control unit 41B includes a call connection signal control unit 411B, a call signal control unit 412B, and a response signal control unit 413B. Further, the subscriber server 4B can include a priority control unit 82. Hereinafter, each function with which the subscriber server 4B is provided is demonstrated. The priority control unit 82 has been described in terms of the functions provided in the IP conversion device 3A (see FIG. 2B), and thus the description thereof is omitted.

  The protocol control unit 41B performs call control between the caller and the receiver. Hereinafter, the functions of the protocol control unit 41A will be described separately for the types of requests and responses.

  The call connection signal control unit 411B transfers the INVITE request as a call connection signal transmitted from the relay server 6 to the IP conversion device 3B.

  When the call signal control unit 412B receives the INVITE request as the call connection signal transmitted from the relay server 6, the call signal control unit 412B transmits 180 Ringing as the call signal to the relay server 6.

  When the response signal control unit 413B receives 200OK as the response signal from the IP conversion device 3B, the response signal control unit 413B transfers the 200OK as the response signal to the relay server 6.

<Functions Provided by IP Conversion Device 3B>
Next, with reference to FIG. 6A, functions provided in the destination IP conversion device 3B will be described. The IP conversion device 3B includes a call unit 31B. Further, the IP conversion device 3B can include a calling number notification unit 81 and a priority control unit 82. Hereinafter, each function with which IP conversion apparatus 3B is provided is demonstrated. Note that the calling number notification unit 81 has been described as a function provided in the intranet AS5, and the priority control unit 82 has been described as a function provided in the IP conversion device 3A.

  The call unit 31B converts the voice transmitted from the subscriber telephone 7 into a digital signal and transmits it to the IP conversion device 3A. Further, the voice transmitted from the public telephone 2 is converted into an analog signal and transmitted to the subscriber telephone 7.

<Functions of the subscriber telephone 7>
Next, with reference to FIG. 6 (b), illustrating the function of station set 7 comprises. The subscriber telephone 7 includes a call unit 71. Hereinafter, each function provided in the subscriber telephone 7 will be described.

The call part 71 is a function for realizing a call. The call unit 71 inputs voice or the like through a microphone and sends it to the IP conversion device 3B, or receives a tone (for example, a ringing tone (hereinafter sometimes referred to as RBT)) or voice received from the IP conversion device 3B. Is output via a speaker.
This is the end of the description of the functions of the public telephone service system 1 according to the first embodiment.

<< Operation of Public Telephone Service System According to First Embodiment >>
With reference to FIG.7 and FIG.8, operation | movement of the public telephone service system 1 which concerns on 1st Embodiment is demonstrated.
The caller dials via the public telephone 2. The call control unit 22 of the public telephone 2 transmits a dial signal to the IP conversion device 3A (step S001).

  The call control unit 32A of the IP conversion device 3A recognizes that the caller is the public telephone 2 from the caller type of the received dial signal. Next, dial signal conversion section 341A converts the received dial signal into an INVITE request as a call connection signal. Here, the priority control unit 82 sets “payphone” as a parameter indicating that the type of the caller terminal is a public telephone in the cpc parameter of the converted INVITE request (step S002). Next, the dial signal conversion unit 341A transmits the converted INVITE request to the subscriber server 4A (step S003).

  When the public telephone 2 is a digital public telephone service system, the dial signal conversion unit 341A receives the encoded frequency part, and performs decoding and tampering check. The same applies to the storage results in step S028 and step S034 shown in FIG.

  When the call connection signal control unit 411A of the subscriber server 4A receives the INVITE request as the call connection signal, the call connection signal control unit 411A transfers the received INVITE request to the network AS5 (step S004).

  The call connection signal control unit 511 of the intra-network AS 5 receives an INVITE request as a call connection signal. Here, the calling number notification unit 81 sets “C” as a parameter of the reason for the display failure in the PAI (P-Asserter-Identity) header of the INVITE request (step S005). Further, the frequency storage cycle determination unit 521 calculates a corresponding charging rate from the charging rate information 501 based on the distance between the outgoing and incoming points and the date and time. Next, the frequency storage cycle determination unit 521 determines the storage cycle and the frequency based on the calculated charging rate (step S006).

  Next, the call connection signal control unit 511 returns an INVITE request in which a parameter indicating that display is impossible is set back to the subscriber server 4A (step S007).

  In the operation of step S004 or step S007, the connection restriction unit 84 provided in the subscriber server 4A or the in-network AS5 identifies whether the received INVITE request as a call connection signal is a number band where the call can be made, and the call can be made. In such a case, the connection process is continued.

  In the case of a digital public telephone service system in which the public telephone 2 is a digital public telephone, the dial signal converter 341A of the IP converter 3A and the subscriber server 4A of the IP converter 3A are operated during the operation of step S003, step S004, or step S007. The call connection signal control unit 411A or the call connection signal control unit 511 of the intra-network AS5 verifies whether the digital payphone is a regular digital payphone. Specifically, it is verified whether or not the calling ID notified from the digital payphone at the time of outgoing call is a calling ID allowed for the corresponding line, and when the digital payphone is a regular digital payphone, Continue the connection process.

  When the call connection signal control unit 411A of the subscriber server 4A receives the INVITE request as the call connection signal, the call connection signal control unit 411A transfers the received INVITE request to the called subscriber server 4B via the relay server 6 (step S008, step S008). S009).

  The call connection signal control unit 411B of the subscriber server 4B receives the INVITE request as a call connection signal. Next, the calling signal control unit 412B transmits 180 Ringing as a calling signal to the subscriber server 4A via the relay server 6 (steps S010 and S011).

  When the ringing signal control unit 412A of the subscriber server 4A receives 180Ringing as a ringing signal, the ringing signal control unit 412A transfers the received 180Ringing to the IP conversion device 3A via the network AS5 (steps S012, S013, and S014).

  Upon receiving 180 Ringing as a calling signal, the RBT conversion unit 342A of the IP conversion device 3A converts the received 180 Ringing into an RBT of the telephone network 8A and sends it to the public telephone 2 (step S015). The call unit 21 of the public telephone 2 outputs the received RBT, and it can be seen that the caller is calling.

  Next, the operation will be described with reference to FIG. Upon receiving 200OK as a response signal from the IP conversion device 3B (not shown), the response signal control unit 413B of the called subscriber server 4B transfers 200OK to the subscriber server 4A via the relay server 6 (step S021, Step S022).

  Upon receiving 200OK as a response signal, the response signal control unit 413A of the subscriber server 4A transfers the received 200OK to the network AS5 (step S023).

  When the response storage instruction signal generation unit 522 of the network AS 5 receives 200 OK as the response signal, it sets the billing information including the frequency determined in step S 006 to 200 OK (step S 024). Then, the response storage instruction signal generation unit 522 converts the set 200 OK to 200 OK as a storage instruction signal for instructing the public telephone 2 to charge, and transmits it to the IP conversion device 3A via the subscriber server 4A (step S025). Step S026).

  In the case of a digital public telephone service system in which the public telephone 2 is a digital public telephone, the response / accommodation instruction signal generation unit 522 gives a call time (call rate) in addition to the frequency, and the subscriber server serves as an accommodation instruction signal. It is transmitted to 3A of IP conversion apparatuses via 4A. The same applies to step S031, which will be described later.

  When receiving the storage OK signal 200OK as the storage instruction signal, the storage signal conversion unit 343A of the IP conversion device 3A converts the storage instruction signal into a response storage signal in the telephone network 8A, and sends the response storage signal to the public telephone 2 (step). S027).

  When the public telephone 2 is a digital public telephone service system in which the public telephone 2 is a digital public telephone, the storage signal conversion unit 343A converts 200OK as a storage instruction signal into DSS1 (CONN) and transmits it to the digital public telephone.

  When the storage result signal conversion unit 344A of the IP conversion device 3A receives the storage result information as a storage result for the response storage signal, the storage result signal conversion unit 344A converts the received storage result information into an ACK as a storage result signal, and the subscriber server 4A Via the network AS5 (step S028, step S029).

  When the public telephone 2 is a digital public telephone service system, the storage result signal conversion unit 344A converts DSS1 (CONN ACK) for notifying the storage result into ACK as a storage result signal.

  When receiving the ACK as the storage result signal, the CDR reflection unit 525 of the intranet AS5 reflects the storage result information in the CDR (step S030). However, when the public telephone 2 is an over-the-counter public telephone and is stored from a prepaid card, it is not reflected in the CDR. The storage result determination unit 524 connects the line if the charge can be stored. Thereby, a telephone call is started.

  The periodic storage instruction signal generation unit 523 of the intra-network AS5 performs, via the subscriber server 4A, INFO as a periodic storage instruction signal in which charging information including the frequency is set according to the storage period determined in step S006 (see FIG. 7). To the IP conversion device 3A (step S031, step S032).

  When receiving the INFO as the periodic storage instruction signal, the storage signal conversion unit 343A of the IP conversion device 3A converts the periodic storage instruction signal into a periodic storage signal in the telephone network 8A and sends the periodic storage signal to the public telephone 2. (Step S033).

  When the public telephone 2 is a digital public telephone service system, the storage signal conversion unit 343A converts INFO as a periodic storage instruction signal into DSS1 (FAC) and sends it to the digital public telephone.

  When the storage result signal conversion unit 344A of the IP conversion device 3A receives storage result information as a storage result for the periodic storage signal, the storage result signal conversion unit 344A converts the received storage result information into 200 OK as a storage result signal, and the subscriber server 4A Via the network AS5 (step S034, step S035).

  When the public telephone 2 is a digital public telephone service system, the storage result signal conversion unit 344A of the IP conversion device 3A sets DSS1 (FAC) for notifying the storage result to 200 OK as a storage result signal. Convert.

  When the CDR reflection unit 525 of the in-network AS 5 receives 200 OK as the storage result signal, it reflects the storage result information in the CDR (step S036). However, when the public telephone 2 is an over-the-counter public telephone and is stored from a prepaid card, it is not reflected in the CDR. In addition, the storage result determination unit 524 disconnects the line if the charge cannot be stored. Thereby, the call is terminated.

  Thereafter, the processing from step S031 to step S036 is repeated. This completes the description of the operation of the public telephone service system 1 according to the first embodiment.

  As described above, the public telephone service system 1 and the public telephone service method according to the first embodiment determine the frequency and the storage cycle, and use the public telephone as the storage instruction signal to which the charging information including the determined frequency is added to the response signal. 2, and according to the determined storage cycle, the storage instruction signal in which the charging information including the determined frequency is set is transmitted to the public telephone 2, whereby the public telephone 2 can be charged. Therefore, according to the public telephone service system 1 and the public telephone service method according to the first embodiment, it is possible to realize a public telephone service that requires charging processing in the IP network.

<< Configuration of Public Telephone Service System According to Second Embodiment >>
(Overview)
FIG. 9 is a configuration diagram showing a public telephone service system 100 according to the second embodiment of the present invention. The public telephone service system 100 according to the second embodiment includes a public telephone 2, an IP conversion device 103A, a subscriber server 104A, an in-network AS 105, a PSTN-GW 91, a relay switch (IGS / IC) 92, a subscriber switch (GC). ) 93, subscriber telephone set 7, telephone networks 8 A and 8 B (hereinafter sometimes collectively referred to as telephone network 8), IP network 9, and PSTN network 94.

  The difference between the first embodiment and the second embodiment is that a PSTN network is connected to the IP network 9 via the PSTN-GW 91, and a call between the public telephone 2 and the subscriber telephone 7 is performed via the PSTN network 94. That is.

  The problem here is when the PSTN network 94 is managed by a person different from the administrator of the IP network 9. In that case, it may be difficult to manage the charging rate in the PSTN network 94 only by the charging rate information. That is, there is a case where the charging rate in the PSTN network 94 cannot be known in advance. As described above, the public telephone service system according to the second embodiment can realize a public telephone service that requires charging processing in the IP network even in a call in which the charging rate is not managed in advance.

  Hereinafter, devices constituting the public telephone service system 100 according to the second embodiment will be described. In addition, about the same apparatus as the public telephone service system 1 of 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. In the second embodiment, it is assumed that call control is performed using SIP standardized as RFC3261.

(PSTN-GW91, IGS / IC92, GC93)
A PSTN-GW (gateway) 91 as an IP / PSTN connection device is a device that connects two different networks, an IP network 9 and a PSTN (Public Switched Telephone Network) network 94. A subscriber system switch (GC) 93 is a device that performs subscriber system call processing of the PSTN network 94. The relay exchange (IGS / IC) 92 is a device that performs relay-system call processing of the PSTN network 94.

<< Function of Public Telephone Service System According to Second Embodiment >>
Next, each function with which each apparatus which comprises the public telephone service system 100 which concerns on 2nd Embodiment shown in FIG. 9 is provided is demonstrated. In the description, only points different from the public telephone service system 1 according to the first embodiment will be described, and the same functions will be denoted by the same reference numerals and description thereof will be omitted. In the second embodiment, call control is performed using SIP standardized as RFC3261.

<Functions provided by the public telephone 2>
Since the function of the public telephone 2 is the same as that of the first embodiment, the description thereof is omitted (see FIG. 2A).

<Functions Provided by IP Conversion Device 103A>
The functional configuration of the IP conversion device 103A shown in FIG. 9 is the same as the functional configuration of the IP conversion device 3A of the first embodiment, so that it will not be newly illustrated and will be described with reference to FIG. Hereinafter, new functions will be given only to functions having different processes. Since the RBT conversion unit 342A has a function that is different from that of the first embodiment, the IP conversion apparatus 103A of the second embodiment replaces the RBT conversion unit 342A in FIG. 2 with an RBT conversion unit 1342A (not shown). . The RBT conversion unit 1342A converts 18x as a calling signal transmitted from the subscriber server 104A into an RBT of the telephone network 8A and sends it to the public telephone 2.

<Functions Provided by Subscriber Server 104A>
Since the functional configuration of the subscriber server 104A shown in FIG. 9 is the same as the functional configuration of the subscriber server 4A of the first embodiment, it will be described with reference to FIG. Hereinafter, only new functions will be given to functions having different processes. The functions that are different from those in the first embodiment are a call connection signal control unit 411A, a call signal control unit 412A, a response signal control unit 413A, a response storage instruction signal control unit 414A, and a periodic storage instruction signal control unit 415A.

  In the subscriber server 104A of the second embodiment, the call signal control unit 412A in FIG. 3 is replaced with a call signal control unit 1412A (not shown). The call signal control unit 1412A transfers 18x as a call signal including charging information including the frequency and the type transmitted from the PSTN-GW 91 to the intra-network AS 105. Also, 180x as the call signal transferred from the network AS 105 is transferred to the IP conversion apparatus 103A.

  In the subscriber server 104A of the second embodiment, the call connection signal control unit 411A, the response signal control unit 413A, the response storage instruction signal control unit 414A, and the periodic storage instruction signal control unit 415A of FIG. 1411A, response signal control unit 1413A, response storage instruction signal control unit 1414A, and periodic storage instruction signal control unit 1415A (all not shown). The call connection signal control unit 411A, the response signal control unit 413A, the response storage instruction signal control unit 414A, and the periodic storage instruction signal control unit 415A replace the relay server 6 described in the function of the first embodiment with the PSTN-GW91. Replace with and apply.

<Functions provided in the network AS 105>
The functional configuration of the intra-network AS 5 shown in FIG. 9 is the same as the functional configuration of the intra-network AS 5 of the first embodiment, and therefore will not be newly illustrated and will be described with reference to FIG. Hereinafter, only new functions will be given to functions having different processes. The functions that are different from those in the first embodiment are the call signal control unit 512 and the frequency storage period determination unit 521. Therefore, in the intranet AS105 of the second embodiment, the corresponding functions in FIG. part 1512, and replaced with power storage cycle determining section 1521 (both not shown).

  The call signal control unit 1512 returns 18x as a call signal transmitted from the subscriber server 104A to the subscriber server 104A.

  In addition to the function described in the frequency storage cycle determination unit 521 of the first embodiment, the frequency storage cycle determination unit 1521 determines the storage cycle and frequency from 18x as a call signal including billing information including the frequency and type. To do. The meaning that the type (10 yen or 100 yen unit) is transmitted here is, for example, that charges are stored in units of 100 yen for international calls. Therefore, it is necessary to take this into consideration when determining the frequency and storage period. Because there is. It is also possible to determine that the call is an international call from the destination telephone number or the like and generate it without receiving the type.

  In addition, the meaning of having the function of the frequency storage period determining unit 521 of the first embodiment is that the first implementation is performed when the charging rate of the PSTN network 94 is determined in advance through consultation and determined by the charging rate information 501. In the second embodiment described above, the storage period and frequency are determined by the function described in the embodiment, and the charging information including the frequency and type is received when the charging rate of the PSTN network 94 is changed without prior notification. The function is to determine the storage cycle and frequency.

<Functions provided by PSTN-GW91>
Next, with reference to FIG. 10, for explaining the functions of the PSTN-GW91. The PSTN-GW 91 includes a protocol control unit 911. The protocol control unit 911 includes a call connection signal control unit 9111, a call signal control unit 9112, and a response signal control unit 9113. Furthermore, the PSTN-GW 91 can include a priority control unit 82. Hereinafter, each function with which PSTN-GW91 is provided is demonstrated. Note that the priority control unit 82 has been described in terms of the functions provided in the IP conversion device 3A (see FIG. 2B) of the first embodiment, and a description thereof will be omitted.

  The protocol control unit 911 mutually converts an IP network signal and a PSTN network 94 signal. Then, a signal used for call control between the caller and the receiver is transferred. Hereinafter, the functions of the protocol control unit 911 will be described separately for the types of requests and responses.

  The call connection signal control unit 9111 converts an INVITE request as a call connection signal transmitted from the subscriber server 104A into an IAM (Initial Address Message) of the PSTN network 94. Further, the call connection signal control unit 9111 sets a parameter representing the public telephone 2 in the outgoing user type column of the IAM, and sets a display impossible reason “C” in the outgoing call ID column. Then, the data is transferred to the IGS / IC 92.

  The call signal control unit 9112 converts the ACM (Address Complete Message), CPG (Call Progress), etc. (hereinafter referred to as “ACM etc.”) transmitted from the IGS / IC 92 into 18x of the IP network 9. To the subscriber server 104A.

  The response signal control unit 9113 converts an ANM (Answer Message) as a response signal transmitted from the IGS / IC 92 into 200 OK of the IP network 9 and transfers it to the subscriber server 104A.

<Functions of IGS / IC92>
Next, functions provided in the IGS / IC 92 will be described with reference to FIG. The IGS / IC 92 includes a protocol control unit 92. The protocol control unit 92 includes a call connection signal control unit 9211, a call signal control unit 9212, and a response signal control unit 9213. Further, the IGS / IC 92 can include a priority control unit 82. Hereinafter, each function provided in the IGS / IC 92 will be described. Note that the priority control unit 82 has been described in terms of the functions provided in the IP conversion device 3A (see FIG. 2B) of the first embodiment, and a description thereof will be omitted.

  The protocol control unit 921 transfers a signal used for call control between the caller and the receiver. Hereinafter, the function of the protocol control unit 921 will be described separately for the types of requests and responses.

  The call connection signal control unit 9211 transfers the IAM as a call connection signal transmitted from the PSTN-GW 91 to the GC 93.

  When the call signal control unit 9212 receives an IAM as a call connection signal transmitted from the PSTN-GW 91, the call signal control unit 9212 transmits an ACM or the like as a call signal to the PSTN-GW 91.

  When receiving the ANM as the response signal from the GC 93, the response signal control unit 9213 transfers the ANM as the response signal to the PSTN-GW 91.

<Functions of GC93>
Next, functions provided in the GC 93 will be described with reference to FIG. The GC 93 includes a call unit 931. Further, the GC 93 can include a calling number notification unit 81 and a priority control unit 82. The calling unit 931 transfers the voice sent from the subscriber telephone 7 to the IGS / IC 92. The calling number notification unit 81 will be described in terms of the functions provided in the intra-network AS 5 (see FIG. 4) of the first embodiment, and the priority control unit 82 will be described with respect to the IP conversion device 3A (FIG. ))), The description is omitted.

<Functions of the subscriber telephone 7>
Since the function of the subscriber telephone 7 is the same as that of the first embodiment, the description is omitted (see FIG. 6B).
This is the end of the description of the functions of the public telephone service system 100 according to the second embodiment.

<< Operation of Public Telephone Service System According to Second Embodiment >>
With reference to FIG.12 and FIG.13, operation | movement of the public telephone service system 100 which concerns on 2nd Embodiment is demonstrated. Further, the description will be made only on the points that are different from the public telephone service system 1 according to the first embodiment, and the same operations are denoted by the same steps, and the description thereof is omitted.

  When the call connection signal control unit 1411A of the subscriber server 104A receives the INVITE request as the call connection signal (step S007 in FIG. 12), the call connection signal control unit 1411A transfers the received INVITE request to the PSTN-GW 91 (step S501).

  The call connection signal control unit 9111 of the PSTN-GW 91 converts an INVITE request as a call connection signal transmitted from the subscriber server 104A into an IAM of the PSTN network 94. At this time, the call connection signal control unit 9111 sets a parameter representing the public telephone 2 in the outgoing user type column of the IAM, and sets a display impossible reason “C” in the outgoing ID column (step S502). And it transfers to IGS / IC102 (step S503).

  The call connection signal control unit 9211 of the IGS / IC 92 receives the IAM. Next, the call signal control unit 9212 transmits an ACM or the like as a call signal to the PSTN-GW 91 (step S504).

  The call signal control unit 9112 of the PSTN-GW 91 converts the received ACM or the like as the call signal into 18x of the IP network 9 and transfers it to the subscriber server 104A (step S505).

  When the call signal control unit 1412A of the subscriber server 104A receives 18x as a call signal, the call signal control unit 1412A transfers the received 18x to the network AS 105 (step S506).

  The frequency storage cycle determination unit 1521 of the network AS 105 determines the storage cycle and frequency from 18x as a call signal including billing information (step S507). And it transfers to IP conversion apparatus 103A via subscriber server 104A (step S508, step S509).

  When the RBT conversion unit 1342A of the IP conversion apparatus 103A receives 18x as a calling signal, the RBT conversion unit 1342A converts the received 18x into an RBT of the telephone network 8A and sends it to the public telephone 2 (step S510). The call unit 21 of the public telephone 2 outputs the received RBT, and it can be seen that the caller is calling.

  Next, the description of the operation will be continued with reference to FIG. When receiving the ANM as the response signal, the response signal control unit 9213 of the IGS / IC 92 transfers it to the PSTN-GW 91 (step S511).

The response signal control unit 9113 of the PSTN-GW 91 converts the ANM as the received response signal into 200 OK of the IP network 9 and transfers it to the subscriber server 104A (step S512). The subsequent steps are the same as step S023 to step S036 of the first embodiment, and a description thereof will be omitted.
This concludes the description of the operation of the public telephone service system 100 according to the second embodiment.

  As described above, in the public telephone service system 100 and the public telephone service method according to the second embodiment, when a call is made at a charging rate different from the charging rate stored in the storage unit 50 of the in-network AS 5, The charging rate to be applied is received from the call destination, the frequency and the storage cycle are determined at the new charging rate, and the pay processing of the public telephone 2 can be performed at the newly determined frequency and storage cycle. Therefore, according to the public telephone service system 100 and the public telephone service method according to the second embodiment, it is possible to realize a public telephone service that requires charging processing in the IP network even in a call that does not manage the charging rate. it can.

<< Functions specific to analog or digital public telephone service system >>
An example in which a new function is added to the public telephone service system according to the first embodiment and the second embodiment (hereinafter referred to as each embodiment) will be described. The ability to add is unique in analog public telephone service system or digital public telephone service system functions. For convenience of explanation, the additional function will be described using the public telephone service system 1 according to the first embodiment. Hereinafter, the additional function will be described with reference to FIG. First, the public telephone service system 1 will describe (1) additional functions provided in the case of an analog public telephone service system, and then (2) additional functions in the case of a digital public telephone service system.

(1) In the case of an analog public telephone service system <Additional functions provided in the IP conversion device 3A>
Referring to FIG. 14, illustrating the IP converter 3A additional functions of the according to the first embodiment. The IP conversion device 3A can include an emergency button transmission unit 85 and a pink telephone identification unit 86 as additional functions. The DT first unit 87 is an additional function in the case of a digital public telephone service system, and will be described later. Each function will be described below.

  The emergency button transmitter 85 presses an emergency button provided on the analog public telephone and allows no coin transmission when calling an emergency call number (for example, “110”, “118”, “119”, etc.). To do. The emergency button transmission unit 85 recognizes that the emergency button has been pressed on the analog public telephone 2, and indexes emergency call pre-translation data (not shown) when a dial signal is received. When the dial signal is a number that allows an emergency call (for example, “110”, “118”, “119”, etc.), the emergency button transmission unit 85 converts it into an IP packet and transmits it to allow the emergency call. Otherwise, the IP packet is not transmitted as a BT connection. The emergency button transmitter 85 can be provided in the subscriber server 4A or in the network AS5 (both not shown). When deployed in the subscriber server 4A and the in-network AS5, the emergency button transmission unit 85 receives information on pressing of the emergency button from the public telephone 2 via the IP conversion device 3A, and the dial signal allows an emergency call. Judgment is made as to whether or not the number. At this time, it is recognized that the emergency button has been pressed in the IP conversion device 3A, and the subscriber server 4A or the AS 5 in the network determines whether the dial signal is a number that allows an emergency call. Also good.

  The pink telephone identification unit 86 implements a function specific to a pink telephone when the analog public telephone of the caller is a pink telephone. As a function unique to the pink telephone, for example, even the public telephone 2 is not preferentially connected. The pink telephone identification unit 86 sets “pink-payphone” as a parameter indicating that the caller terminal indicates a pink telephone in the cpc parameter of the INVITE request as a call connection signal. In the network AS5, the subscriber server 4, etc., it is determined whether the call originates from the pink phone depending on whether or not “pink-payphone” is set in the cpc parameter, and “pink-payphone” is set in the cpc parameter. If set, each device performs processing specific to the pink telephone.

(2) In the case of a digital public telephone service system <Additional functions provided in IP conversion device 3A>
Referring to FIG. 14, illustrating the IP converter 3A additional functions of the according to the first embodiment. The IP conversion device 3A can include a DT first unit 87 as an additional function.

  The DT first unit 87 allows connection even when the input frequency notified from the digital public telephone is “0”. The DT first unit 87 may be provided in a device including the charging control unit 52 together. The DT first unit 87 can be installed in the IP conversion device 3A, the subscriber server 4A, and the intra-network AS5.

<< Deployment of charging control unit to other devices >>
In the first embodiment, as shown in FIG. 4, the network AS 5 includes a storage unit 50 and a charging control unit 52. In the second embodiment, the intranet AS 105 (not shown) includes a storage unit 50 and a charging control unit 52. On the other hand, the subscriber servers 4A and 104A or the IP conversion devices 3A and 103A according to each embodiment may include the storage unit 50 and the charging control unit 52. Hereinafter, with reference to FIGS. 15 to 17, characteristics in the case where the in-network AS 5, 105, the subscriber servers 4A and 104A, and the IP conversion devices 3A and 103A include the storage unit 50 and the charging control unit 52 will be described.

(AS5,105 deployment pattern in the network)
FIG. 15 is a sequence diagram of a charging process when the intranet AS5, 105 includes a storage unit 50 and a charging control unit 52 (both not shown). In each embodiment, this deployment method is applied, and FIG. 15 illustrates a simplified process after step S025 illustrated in FIG.

  As described above, the intranet AS5, 105 includes the storage unit 50 and the charging control unit 52, so that the public telephone service systems 1 and 100 have the following characteristics. (1) Accounting data can be aggregated by connecting a plurality of subscriber servers 4A and 104A to one application server. (2) By providing a dedicated server for performing billing control, there is an influence on a conventional server in the IP network 9 (for example, when there are conventional subscriber servers 4A and 104A constituting an existing telephone service system). Can be small.

(Subscriber server 4A, 104A deployment pattern)
FIG. 16 is a sequence diagram of billing processing when the subscriber servers 4 and 104A include the storage unit 50 and the billing control unit 52 (both not shown). FIG. 16 simply shows the processing after step S025 shown in FIG.

  As described above, when the subscriber servers 4A and 104A include the storage unit 50 and the charging control unit 52, the public telephone service systems 1 and 100 have the following characteristics. When a delay occurs in the IP network 9, the accuracy of the storage period is higher than the AS deployment pattern in the network.

(IP conversion device 3A, 103A deployment pattern)
FIG. 17 is a sequence diagram of charging processing when the IP conversion devices 3A and 103A include the storage unit 50 and the charging control unit 52 (both not shown). FIG. 17 simply shows the processing after step S025 shown in FIG.

  As described above, the IP conversion devices 3A and 103A include the storage unit 50 and the charging control unit 52, so that the public telephone service systems 1 and 100 have the following characteristics. (1) When a delay occurs in the IP network 9, the accuracy of the storage period is the highest compared to other deployment patterns. (2) By performing the charge control by the IP conversion devices 3A and 103A, it is possible to connect to a conventional server in the IP network 9 (for example, when there are conventional subscriber servers 4A and 104A constituting an existing telephone service system). The impact can be reduced.

  Further, in the storage result determination in the digital public telephone service system, the encoded part of the storage result is decoded and tampering check is performed (quoted in step S003, steps S028 and S034). An IP conversion device deployment pattern (FIG. 17) in which this processing is deployed in the IP conversion device and decoded into an IP packet, and the IP conversion devices 3A and 103A do not decode, but converts the IP packet into an encoded packet, An AS deployment pattern (FIG. 15) in the network that performs decryption and tampering checks at AS5, 105 is possible.

(Effects of deployment of billing control unit to other devices)
As described above, the in-network AS 5, 105, the subscriber servers 4A, 104A, or the IP conversion devices 3A, 103A can include the storage unit 50 and the charging control unit 52, and the effect varies depending on the location of the arrangement. . Therefore, it is possible to determine a device including the storage unit 50 and the charge control unit 52 in accordance with the public telephone service desired to be realized.

DESCRIPTION OF SYMBOLS 1 Public telephone service system 2 Public telephone 3, 3A, 3B IP conversion apparatus 4, 4A, 4B Subscriber server (call control server)
5 Application server in the network (application server)
6 Relay server (call control server)
7 Subscriber telephone (telephone)
8, 8A, 8B Telephone network 9 IP network (IP network)
21, 31A, 31B, 71 Calling unit 23, 33A Billing unit 34A Protocol conversion unit 341A Dial signal conversion unit 342A RBT conversion unit 343A Storage signal conversion unit 344A Storage result signal conversion unit 41A, 41B, 51, 61 Protocol control unit 411A, 411B, 611 Call connection signal control unit 412A, 412B, 512, 612 Call signal control unit 413A, 413B, 613 Response signal control unit 414A Response storage instruction signal control unit 415A Periodic storage instruction signal control unit 50 Storage unit 501 Charge rate information 502 Call detail information (CDR)
52 Charging Control Unit 521 Frequency Storage Period Determination Unit 522 Response Storage Instruction Signal Generation Unit 523 Periodic Storage Instruction Signal Generation Unit 524 Storage Result Determination Unit 525 CDR Reflection Unit 81 Calling Number Notification Unit (Caller Number Notification Unit)
82 Priority control part 83 Public free part 84 Connection restriction part 85 Emergency button transmission part 86 Pink telephone identification part 87 DT first part 1342 RBT conversion part 1412A, 1512 Call signal control part 1521 Frequency storage period determination part 91 PSTN-GW
911 Protocol control unit 9111 Call connection signal control unit 9112 Call signal control unit 9113 Response signal control unit

Claims (10)

An IP conversion device, a call control server, and an application server in an IP network communicate with each other data including a telephone number, thereby enabling a call from a public telephone connected to the IP network to another telephone. A public telephone service system,
The dial signal transmitted from the public telephone is converted into a call connection signal of the IP network and transmitted to the application server via the call control server, and the public signal transmitted from the application server The storage instruction signal of the IP network that instructs the telephone to be charged is converted into a storage signal of the telephone network and transmitted to the public telephone, and the public telephone is transmitted to the storage instruction signal. An IP conversion device comprising: a storage result signal converting unit that converts a storage result notification signal to an IP network storage result signal and transmits the signal to the application server via the call control server;
A call that receives the call connection signal from the IP converter connected to the public telephone that is the transmission source of the dial signal, and further transmits the call connection signal to the other telephone via the call control server. A connection signal control unit, a storage unit for storing a billing rate, which is a call time per unit charge based on a distance between outgoing and incoming call points, and a time zone, and a public telephone when receiving the call connection signal A frequency storage period determining unit that determines the frequency and storage period that are stored at a time using the charging rate, and a response signal indicating a successful call connection from the other telephone with respect to the call connection signal. A response accommodation signal generation unit that, when received, transmits to the public telephone via the call control server as the accommodation instruction signal to which charging information including the determined frequency is added to the response signal; A storage instruction signal generation unit configured to generate the storage instruction signal in which the charging information including the determined frequency is set according to the storage period, and to transmit to the public telephone via the call control server; When the storage result signal is received from the IP conversion device connected to the public telephone that is the transmission source of the notification signal, the line is maintained if the charge is stored, and the line is connected if the charge is not stored. An application server comprising a storage result determination unit for cutting;
A public telephone service system comprising: The frequency storage cycle determination unit is
Receiving a call signal including a frequency different from the frequency, and newly determining a storage period and frequency from the call signal;
The public telephone service system according to claim 1. The application server or the IP conversion device is
Calling number notifying unit for setting a parameter for disabling caller number notification in the call connection signal when the call connection signal is received from the IP conversion device connected to the public telephone that is the transmission source of the dial signal Further comprising
The public telephone service system according to claim 1 or 2, characterized in that. The call control server, or the application server,
A phone number set in the previous call connection signal is identified whether or not the number band that can be called, and if it is a number band that can be called, further comprising a connection restriction unit that shifts to connection processing,
The public telephone service system according to any one of claims 1 to 3, wherein the public telephone service system is provided. The IP conversion device, the call control server, or the application server is:
The call connection signal further includes a priority control unit for setting a parameter indicating a public telephone to the caller terminal,
When the IP conversion device, the call control server, and the application server include the priority control unit, the call connection signal in which a parameter indicating the public telephone is set is preferentially processed.
The public telephone service system according to any one of claims 1 to 4, wherein the public telephone service system is characterized. The application server is
By further receiving a non-billing instruction, further comprising a public free unit that does not transmit the storage instruction signal to the public telephone,
The public telephone service system according to any one of claims 1 to 5, wherein the public telephone service system is characterized. When the public telephone is an analog public telephone,
The IP conversion device, the call control server, or the application server is:
Recognizing that the emergency button provided in the public telephone is pressed, and further comprising an emergency button transmitter that does not transmit a dial signal other than calling a number that allows an emergency call,
The public telephone service system according to any one of claims 1 to 6, wherein the public telephone service system is provided. A public telephone service system that enables a telephone call from a public telephone connected to the IP network to another telephone by allowing an IP conversion device, a call control server, and an application server in the IP network to communicate data with each other A public telephone service method used for
The IP converter is
Transmitting the call connection signal to the application server via the call control server after converting the dial signal from the public telephone into a call connection signal of the IP network;
The application server is
A frequency and a storage cycle that are charges stored by the public telephone at a time using a charging rate that is a call time per unit charge based on a distance between calling and receiving points and a time zone, which is stored in the storage unit A step of determining
Transmitting to the other telephone of the other party via the call control server;
Receiving a response signal for the call connection signal from the other telephone set via the call control server;
Charging information including the determined frequency is added to the response signal received from the other telephone, and connected to the public telephone via the call control server as a storage instruction signal for instructing the public telephone to charge Transmitting to the IP converter;
The IP converter is
Transmitting the storage instruction signal received from the application server to the public telephone after converting it into a response storage signal, and receiving storage result information for the response storage signal;
Storing a storage result signal in which the storage result information received from the public telephone is set to the application server via the call control server;
The application server is
Transmitting a storage instruction signal in which billing information including the determined frequency is set according to the determined storage cycle, to the IP converter connected to the public telephone via the call control server;
The IP converter is
Transmitting the storage instruction signal received from the application server to the public telephone set after converting it into a periodic storage signal, and receiving storage result information for the periodic storage signal;
Storing a storage result signal in which the storage result information received from the public telephone is set to the application server via the call control server;
A public telephone service method comprising: Charges that the public telephone stores at a time using the billing rate that is the call time per unit charge based on the distance between the outgoing and incoming call points and the time zone, which is stored in the storage unit by the application server The step of determining the frequency and storage cycle is
The application server is
Receiving a call signal including a frequency different from the frequency, and newly determining a storage period and frequency from the call signal;
The public telephone service method according to claim 8, wherein:   A program for causing the IP conversion device, the call control server, and the application server to execute the public telephone service method according to claim 8 or 9.

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