JP3319431B2 - Access network device and access network system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an access network system in which an access network device is installed between a subscriber terminal and a local exchange in a public line network.

[0002]

2. Description of the Related Art FIG. 6 is a system configuration diagram showing one configuration example of an access network system in a public line network. In the system shown in FIG. 6, an access network device 101 accommodates subscriber terminals 103 and 104 and is connected to a central office (subscriber exchange) 102 via a transmission device 105 and a transmission line 107. The central office switch 102 is connected to a transmission line 107 via a transmission device 106.

[0005] The access network device 101 performs only interface processing between the subscriber terminals 103 and 104 and the central office switch 102. The call processing is performed by the central office 10
2 software. Such an access network system efficiently covers a depopulated area, an area where a telephone station is not installed, and the like.

The transmission and reception of information between the access network device 101 and the central office switch 102 is performed by using an open interface, ESTI's ETS300 324-1, ET.
S300 347-1 and ITU-T. 964
G. FIG. This is performed using the V5 interface defined in the Recommendation 965.

The billing process for the subscriber terminals 103 and 104 is executed by software of the central office switch 102.
It is the access network device 101 that actually transmits the charging pulse to the subscriber terminals 103 and 104.
Therefore, the central office switch 102 gives the access network device 101 an instruction to send a charging pulse in accordance with the rules of the V5 interface. For example, subscriber terminal 1
Assuming that 03 is busy, the central office exchange 102 instructs the access network device 101 for each predetermined period during the call to the number of charging pulses corresponding to that period. And
The access network device 101 sends out a designated number of charging pulses to the subscriber terminal 103 within the predetermined period.

[0006]

However, in the system in which the number of charging pulses is indicated to the access network device 101 by one message as described above, the central office switch 102 transmits the number of charging pulses to the access network device 101. After indicating the number of charging pulses, it is not possible to know how many charging pulses have actually been transmitted to the subscriber terminal 103 during off-hook.

[0007] The state (on-hook or off-hook) of the subscriber terminal 103 is notified from the access network device 101 to the central office 102. Therefore, the central office exchange 1
02 may be configured to predict the number of pulses transmitted to the subscriber terminal 103 based on the timing at which the subscriber terminal 103 changes from off-hook to on-hook. However, there is a time delay from when the state of the subscriber terminal 103 changes to when the central office switch 102 recognizes the change. Therefore, even with such a configuration, it is difficult to accurately predict the number of transmitted pulses.

The V5 interface also has a designation for continuing to transmit the specified number of charging pulses irrespective of a state change (for example, from off-hook to on-hook) on the subscriber terminal 103 side. When such designation is made valid, the number of pulses designated by the central office exchange 102 matches the number of pulses actually transmitted to the subscriber terminal 103. However, when the subscriber terminal 103 is a terminal with a frequency counter, a phenomenon occurs in which the frequency increases after on-hook occurs, and a trouble may occur between the user and the network operator.

An object of the present invention is to solve the above-mentioned problems and to provide an access network apparatus and an access network system capable of correctly grasping the number of charging pulses actually transmitted to a subscriber terminal in a subscriber exchange. The purpose is to provide.

[0010]

According to the present invention, there is provided an access network apparatus comprising: a correction value reporting means for reporting to a subscriber exchange, as a correction value, an untransmitted portion to a subscriber terminal with respect to a charging pulse number designated by the subscriber exchange; It is characterized by having.

[0011] In the access network device, the correction value reporting means calculates and reports a correction value when the on-hook of the subscriber terminal during a call is detected. Therefore, the local exchange can correct the billing count value based on the on-hook of the subscriber terminal, and can match the billing count value on the subscriber terminal side.

The correction value reporting means, if the bit length of the correction value in the message for reporting the correction value is shorter than the bit length of the charging pulse number in the charging pulse number indication message sent from the subscriber exchange, The message of the correction value may be configured to be reported by the message of (1).
In such a configuration, the local exchange can correct the accounting count value even if the bit length of the correction value in the message for reporting the correction value is not sufficient.

[0013] In the access network system according to the present invention, the access network device transmits a charging pulse to a subscriber terminal in accordance with the number of charging pulses, and a charging pulse control means for transmitting a charging pulse to the subscriber terminal. Correction value reporting means for reporting the untransmitted portion to the terminal as a correction value to the local exchange; the charging management unit of the local exchange instructs the access network device to indicate a plurality of charging pulses in one message; When the correction value is received from the access network device, the correction value is subtracted from the total number of charging pulses instructed to the access network device to obtain a charging count value for the subscriber terminal.

In the access network system,
The correction value reporting means of the access network device calculates and reports a correction value when the on-hook of the subscriber terminal during a call is detected.

In the access network system, if the bit length of the correction value in the message for reporting the correction value is shorter than the bit length of the charging pulse number in the charging pulse number indication message sent from the local exchange,
The correction value reporting means of the access network device reports the correction value in a plurality of messages, and the charging management unit of the subscriber exchange switches each of the plurality of messages reported from the total number of charging pulses instructed to the access network device in a plurality of messages. The correction value may be subtracted.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration example of an access network device according to the present invention. The configuration of the entire access network system is shown in FIG.
Is the same as the configuration shown in FIG. In FIG. 1, a subscriber circuit control device 202 includes a subscriber circuit 2 for performing subscriber monitoring and the like.
01A to 201N, each subscriber terminal 103, 104
To accommodate. An on-hook detection device 206 and a charging pulse control device 207 are connected to the subscriber circuit control device 202. The charging pulse control device 207 controls the transmission of charging pulses in accordance with an instruction from the central office 102 via the V5 interface, and counts the number of transmission pulses.

The access network apparatus is connected to the central office 102 via trunks 205A to 205N controlled by a trunk control circuit 204. Subscriber circuit control device 202 and trunk control circuit 2
A time division switch (TDSW) 203 that performs switching between a subscriber and a circuit channel exists between the subscriber and the subscriber.
Then, the CPU 208 controls the entire apparatus according to a program stored in the memory 209.

Next, the operation will be described with reference to the sequence diagram of FIG. 2, the explanatory diagram of FIG. 3, the flowchart of FIG. 4, and the explanatory diagram of FIG. Assuming that the subscriber terminal 103 is making a telephone call, in response to an instruction from the central office 102,
The access network device sends a charging pulse to the subscriber terminal 103 as appropriate. FIG. 2 is a sequence diagram showing a sequence relating to charging pulse transmission conforming to the V5 interface. As shown in FIG.
Is a SIGNAL message (Pulsed-sign
al), the access network device is instructed on the number of charging pulses within a predetermined period.

FIG. 3 is an explanatory diagram showing the format of the Pulsed-signal message. FIG.
9 is a flowchart illustrating an operation of the access network device that has received the Pulsed-signal message. The exchange for central office 102 indicates to the access network device the number of charging pulses by the 6 bits in the 4a octet of the Pulsed-signal message. In FIG. 3, the eighth octet and subsequent eighth octets
The bit is an extension bit indicating whether or not it is the last octet.
icator) is data for instructing whether or not to continue sending billing pulses in accordance with a state change on the subscriber terminal 103 side.

In the access network device, Pu
When the lsed-signal message is received, the charging pulse control device 207 causes the on-hook detection device 206
As long as the detection result is off-hook, the charging pulses are transmitted to the subscriber terminal 103 by the specified number of charging pulses. Specifically, the received Pulsed-signal
Number, the message element in the message
The value of of pulses (the number of pulses) is read and stored (step S11).

Then, the value of the stored pulse number is 0
However, if the subscriber terminal 103 is in the off-hook state (steps S12 and S13), a billing pulse is sent to the subscriber terminal 103 (step S14), and the value of the stored pulse number is reduced by -1. (Step S15).
The above processing is repeated until the value of the stored pulse number becomes zero.

The charging pulse control device 207 sends out a charging pulse every time one unit of time corresponding to one charging pulse elapses. Then, when the pulse transmission for the designated number of charging pulses is completed, S for reporting the completion of the pulse transmission is sent.
IGNAL message (Pulse-notifica
) is transferred to the central office switch 102 (step S).
16).

Upon receiving the pulse notification from the access network device, the central office exchange 102 issues a next billing pulse transmission instruction (SIGNAL message: Pulsed-si
gnal). Until the subscriber terminal 103 disconnects the call, transmission of the charging pulse based on the Pulsed-signal message and return of the pulse notification to the central office 102 are repeated.

When the on-hook detecting device 206 detects the on-hook of the subscriber terminal 103 (step S13), C
The PU 208 transfers the SIGNAL message indicating on-hook to the central office switch 102 and performs the following correction processing.

That is, the correction value is set to S as shown in FIG.
It is transferred to the central office 102 by an IGNAL message (Digit-signal). Digit-si
In the gnal message, 5 bits of bits 1 to 5 of the third octet (Digit information)
n (digit information element)) is set with the number of untransmitted pulses. If the number of untransmitted pulses is 32 or more, the Digit-signal message is transferred to the central office switch 102 twice.

When transferring the correction value, the CPU 20
8 first checks whether or not the value of the stored pulse number is 31 or less (step S17). At this stage, the stored number of pulses indicates the number of pulses that have been instructed by the central office 102 but have not been transmitted to the subscriber terminal 103. If the number of stored pulses is 31 or less, the CPU 208
bits 1-5 of the third octet of the gnal message
Is set to the number of stored pulses (step S1).
8). Then, the Digit-s is sent to the central office 102.
The signal is transferred (step S19).

If the number of stored pulses exceeds 31, the CPU 208 first proceeds to Digit-si
"31 (D) = 1F (H)" is set in bits 1 to 5 of the third octet of the gnal message (step S2).
0), Digit-signa
1 is transferred (step S21). Then
In bits 1 to 5 of the third octet of the Digit-signal message, (the number of stored pulses-31)
Is set (step S22), and the Digit-signal message is transferred to the central office 102 (step S22).

Upon receiving the Digit-signal message, the accounting information management software of the central office exchange 102 reads the correction values set in bits 1 to 5 of the third octet, and counts the read value. Subtract from Then, the subtraction value is stored in the subscriber terminal 103.
Is the final number of billing pulses. Note that the managed count value is the total number of charging pulses instructed to the access network device. Also, Digit-s
When receiving the signal twice, the accounting information management software subtracts the sum of the values set in bits 1 to 5 of the third octet in each message from the managed count value.

As described above, in this embodiment, when the access network device detects the on-hook of the subscriber terminal, the access network device has not transmitted to the subscriber terminal out of the number of charging pulses instructed by central office switch 102. A certain amount is reported to the central office exchange 102 as a correction value. And office exchange 1
02 subtracts the reported value from the managed count number and sets it as the count value for the subscriber. Therefore, even if the subscriber terminal is provided with a frequency meter that stops the frequency count-up due to on-hook,
The count value of the central office exchange 102 matches the count value of the frequency meter. That is, erroneous charging for the subscriber terminal can be more reliably prevented.

[0030]

As described above, according to the present invention, the access network apparatus reports the untransmitted portion to the subscriber terminal with respect to the number of charging pulses instructed by the subscriber exchange to the subscriber exchange as a correction value. Since the configuration is provided with the correction value reporting means, it is possible to provide an environment in which the number of charging pulses actually transmitted to the subscriber terminal can be correctly grasped in the subscriber exchange.

Further, the access network system is
The access network device includes a correction value reporting unit that reports to the subscriber exchange a correction value of an untransmitted portion to the subscriber terminal with respect to the number of charging pulses instructed by the subscriber exchange, and a charging management unit of the subscriber exchange, When the correction value is received from the access network device, the correction value is subtracted from the total number of charging pulses instructed to the access network device to obtain the charging count value for the subscriber terminal. There is an effect that the subscriber exchange can correctly grasp the number of charging pulses transmitted to the terminal.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration example of an access network device according to the present invention.

FIG. 2 is a sequence diagram showing a sequence relating to charging pulse transmission conforming to the V5 interface.

FIG. 3 is an explanatory diagram showing a format of a Pulsed-signal message.

FIG. 4 is a flowchart showing an operation of the access network device.

FIG. 5 is an explanatory diagram showing a format of a Digit-signal message.

FIG. 6 is a system configuration diagram illustrating a configuration example of an access network system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 101 Access network apparatus 102 Central office switch 103,104 Subscriber terminal 105,106 Transmission apparatus 107 Transmission line 201A-201N Subscriber circuit 202 Subscriber circuit control apparatus 203 Time division switch 204 Trunk control circuit 205A-205N Trunk 206 On-hook detection apparatus 207 Charging pulse control device 208 CPU 209 Memory

Claims (6)

(57) [Claims] 1. A subscriber terminal is accommodated and subscribed via a transmission line.
Connected to the local exchange and between the subscriber terminal and the local exchange
Access network device that performs interface processing
A is, in the access network apparatus having a charging pulse control means for delivering a charging pulse to the subscriber terminal according to the number of charging pulses from the subscriber exchange, sending a plurality of charging pulses instructed from the local exchange
The charging pulse sent to the subscriber terminal from the charging pulse number indicating
The value obtained by subtracting the number of
Correct the number of charging pulses specified to the work device
An access network apparatus comprising: a correction value reporting unit that reports to a local exchange as a correction value for obtaining a billing count value for a terminal. 2. The access network device according to claim 1, wherein the correction value reporting means calculates and reports a correction value when an on-hook of the subscriber terminal during a call is detected. 3. The correction value reporting means, when the bit length of the correction value in the message for reporting the correction value is shorter than the bit length of the charging pulse number in the charging pulse number indication message sent from the subscriber exchange. 3. The access network device according to claim 2, wherein the correction value is reported by a plurality of messages. 4. Between the subscriber terminal and the local switch, pressurized
The subscriber terminal is accommodated and connected to the local exchange via a transmission path.
Interface processing between the subscriber terminal and the local exchange.
In an access network system provided with an access network device for performing processing, the access network device includes a charging pulse control means for transmitting a charging pulse to a subscriber terminal according to the number of charging pulses, and a charging pulse instructed by a subscriber exchange. Join from number
Correction value reporting means for reporting a value obtained by subtracting the number of charging pulses sent to the subscriber terminal as a correction value to the local exchange, wherein the charging management unit of the local exchange transmits a plurality of charging pulses.
Instructing the access network device in one message about the number of charging pulses indicating the occurrence, and when receiving a correction value from the access network device, subtracts the correction value from the total number of charging pulses instructed to the access network device and joins. An access network system characterized in that it is a charge count value for a user terminal. 5. The access network system according to claim 4, wherein the correction value reporting means of the access network device calculates and reports the correction value when the on-hook of the subscriber terminal during the call is detected. 6. When the bit length of a correction value in a message for reporting a correction value is shorter than the bit length of the number of charging pulses in the charging pulse number indication message sent from the subscriber exchange, the correction of the access network device is performed. The value reporting means reports the correction value in a plurality of messages, and the charging management unit of the subscriber exchange subtracts each correction value reported in the plurality of messages from the total number of charging pulses instructed to the access network device. The access network system according to claim 5.