KR100215569B1 - Appratus and method of outputting the broadcast-message in isdn uni - Google Patents

Abstract

The present invention relates to an apparatus and a method for outputting a broadcast message at a Subscriber-Network Interface (UNI) of an Integrated Services Digital Network (ISDN), the apparatus comprising: a ROM 10; Table 20; A control unit 30; An interface unit 40; And a buffer 50. The method includes a first step S1 of determining whether a SETUP message is transmitted from the switchboard 1 to the subscriber terminal 2 through the interface unit 40; A second step (S2) of determining whether a setup message has a sub-address when the setup message is transmitted; A third step (S3) of determining whether the sub address is registered in the table (20) if the sub address exists; A fourth step S4 of determining whether the ALERT message is transmitted from the subscriber station 2 having received the set-up message to the switchboard 1 if the sub-address is a registered sub-address; And a fifth step S5 of outputting a set broadcasting message if an alerting message is not transmitted. After a SETUP message is generated from the exchange 1, If the ALERTING message is not generated, the broadcast message is output. If the power of the terminal 2 is turned off due to the carelessness of the subscriber, the user can recognize the power off state of the terminal 2 through the broadcast message This has the effect of making it happen.

Description

An apparatus and method for outputting a broadcast message in a subscriber-network interface (UNI) of an integrated information network (ISDN)

The present invention relates to a Subscriber-Network Interface (UNI) of an Integrated Services Digital Network (ISDN). More particularly, the present invention relates to a method and apparatus for transmitting a broadcast message when there is no call response from a subscriber terminal To a device and method for outputting a broadcast message at a subscriber-network interface of an integrated information communication network.

B-ISDN (Broadband Integrated Services Digital Network) has emerged as a next-generation communication network due to the rapid increase in the demand for communication services of subscribers due to the rapid development of information society. In B-ISDN, (ATM), which is an asynchronous transfer mode, is adopted as a basic transfer means to accommodate both the bandwidth and the speed regardless of the speed and the speed. In order to process the ATM signal, a signal adaptation layer (Signaling AAL) and a draft such as Q.2931 and B- (draft) has been proposed.

That is, in the conventional ISDN (also referred to as narrowband (N) -ISDN), since the transmission speed of the channel carrying the subscriber information is about 64 Kbps to 2 Mbps, it is difficult to satisfy a broadband service such as a moving image.

In contrast, B-ISDN can transmit data at a high speed of 100 Mbps or higher, and can process various information sources such as voice, data, documents, and images equally using ATM technology.

In the signaling system for realizing the connection control in the conventional N-ISDN, the digital subscriber signaling system 1 (DSS1) is used in the subscriber line section and the No.7 common line signaling method is applied in the inter- DSS1 is the implementation of Layer 2 and Layer 3 protocols on the D channel. It is also referred to as LAPD (Link Access Procedure on the D-channel) and recommended as ITU-T standards Q.921 and Q.931. Also, Q.2931, which is extended by adding function elements of asynchronous transfer mode (ATM) to Q.931 as a signaling procedure of subscriber-network interface (UNI) in B-ISDN currently being proposed, has been proposed into the draft, (ISDN User Part) as a signaling procedure for the NNI is proposed in the draft.

That is, the Q931 and Q.2931 used in the subscriber-network interface (UNI) layer 3 for ISDN are the User Network Interface Layer 3 Specification for Basic Call / Connection Control proposed in ITU-T .

For a general call control protocol specification, Q.2931 applied to B-ISDN is shown as an example.

1 is a diagram illustrating an example of a flow of a call processing related message in a B-ISDN subscriber-network interface, in which a call between a calling party 1, a network 2 and a called party 3 It shows the process.

First, a virtual channel connection (VCC) is always established through a signaling ALL for call and connection control, and call / connection control messages are transmitted through the virtual channel, Data, the message used for call / connection control is a message for B-ISDN call / connection control as shown in the following Table 1 and a message for the call between N-ISDN and B-ISDN / Messages used for connection control and messages used for global call reference as shown in Table 3 below.

Messages used for B-ISDN calls and access control Call setup message: ALERTING CALL PROCEEDING CONNECT CONNECT ACKNOWLEDGE SETUP Call release message: RELEASE RELEASE COMPLETE Other: NOTIFY STATUS STATUS ENQUIRY

Messages used to connect to N-ISDN service Call setup message: ALERTING CALL PROCEEDING CONNECT CONNECT ACKNOWLEDGE PROGRESS SETUP SETUP ACKNOWLEDGE Call release message: RELEASE RELEASE COMPLETE Other: NOTIFY INFORMATION STATUS STATUS ENQUIRY

Messages used for global call reference control RESTART RESTART ACKNOWLEDGE STATUS

In FIG. 1, the messages of Tables 1 to 3 generated according to Q.2931 are transmitted using the 'AAL-DATA-REQUEST' primitive of the signal AAL (SAAL).

The caller 1 generates a SETUP message to set up a call and then transmits the SETUP message to the network through the allocated signal virtual channel VCI = 5, starts a timer T303, .

At this time, the setup message includes a call reference, various information elements required for call processing (e.g., called part number, ATM subscriber cell rate, wideband bearer capability, quality of service parameter QoSP ) And the like.

If there is no response for the time set by the timer T 303, the setup message is retransmitted, and if there is no response even after the predetermined number of repetitions, the call processing is stopped.

After receiving the setup message, the network 2 selects and allocates a valid connection identifier (VPI / VCI), then transmits a SETUP message to the called party 3, and then transmits a CALL PROCEEDING message to the calling party (1).

At this time, when the caller 1 receives the call-processing message, it stops the timer T 303 and starts the timer T 310, and then goes out-going call-proceeding state.

The called party 3 receives a setup message and then transmits a CALL PROCEDING message and an ALERTING message to the network 2. The network 2 receives the ALERTING message, (1) and enters the Call Delivered state. When the caller (1) receives the alert message, it stops the timer T 303 or T 310 and enters the call deliv- ery state.

When the called party 3 creates a CONNECT message and then transmits it to the network 2 to allow the connection, the network 2 forwards the message to the caller 1 and sends a CONNECT ACK message To the receiver (3) side, and receives a connect acknowledge message from the sender (1).

A communication path (connection) given with a connection identifier (VPI / VCI) is formed between the caller 1 and the called party 2 through the call processing as described above, so that data can be exchanged.

On the other hand, a subscriber (called party or sender) desiring to release the connection after data transmission ends or during transmission generates a release message and starts a timer T 308 to request the connection to the network to be released, When the network receives a release message, the network releases the connection to the virtual channel. The network also transmits a release message to the other party, notifies the other party of the release message, and transmits a release complete message to the release request side. ) State.

When a subscriber (sender or receiver) requesting the release of the connection receives the release complete message, the timer T 308 is stopped, the virtual channel, the call number, and the like are released and the state becomes null.

The subscriber or network can generate a STATUS ENQUIRY message at any time to request information about the status of the network or other subscriber and the subscriber or network that received the STATUS ENQUIRY message is in a STATUS state, It creates a message and informs you of its status.

2 is a diagram showing a general format of a call processing control related message in a B-ISDN user-network interface, where 1, ..., 8 at the top indicate bits, and 1, 2, etc indicate octets (bytes).

As shown in FIG. 2, the first octet is a protocol discriminator, Q.2931 is 00001001b, bits 8-5 of the second octet are 0000b, bits 4-1 are call reference values Value) is expressed in octets, usually 0011b.

The third octet to the fifth octet represents a call reference value. Specifically, bit 8 of the third octet is a call reference flag, which indicates that from the side (usually the caller side) Indicates a message to be sent, and 1 indicates a message to be sent to the side (usually the caller) that generates the call reference. If all the call reference values are 0b, it represents a global call reference. If all the reference values are 1b, it represents a dummy call reference for a semi-permanent virtual channel connection (SPC).

The sixth octet and the seventh octet represent information related to a message type, and messages are classified according to a sixth octet value as shown in Table 4 below.

Message Coding Bits 8 7 6 5 4 3 2 1 Contents (Message) 0 0 0 0 0 0 0 0 0 0 0 - - - - - 0 0 0 0 1 0 0 0 1 0 0 0 1 1 1 0 1 1 1 1 0 0 0 1 1 0 0 1 0 1 0 1 1 0 1 0 1 0 - - - - - 0 1 1 0 1 1 1 0 1 0 0 0 1 1 0 0 1 1 1 0 0 1 1 - - - - - 1 1 0 1 1 0 1 1 1 0 1 1 1 0 1 1 0 1 0 1 0 1 1 1 - - - - 1 1 1 0 1 1 1 10 1 1 00 1 1 1 1 1 1 1 1 1 1 1 Used in a special message Call setup message: ALERTING CALL PROCEEDING CONNECT CONNECT CONNECT ACKNOWLEDGE PROGRESS SETUP ACKNOWLEDGE Call release message: RELEASE RELEASE COMPLETE RESTART RESTART ACKNOWLEDGE Other message: INFORMATION NOTIFY STATUS STATUS STATUS ENCURRENT SPC UPDATE STATUS ACK SPC STATUS ENQUIRY Spare for SPC UPDATE STATUS Expansion

Bit 8 of the 7th octet indicating the message type related information is normally 1b as an extension, bits 7 and 6 are 00b as a spare, and bit 5 is 0b as a message type flag Indicates that the Message Instruction Field is not important, and 1b is followed by an explicit instruction (Explicit Instruction).

Bit 4 and bit 3 are spare as 0b, bit 2 and bit 1 are a message action indicator, 00b indicates a clear call, 01b indicates discard and ignore, 10b denotes a discard and report status, and 11b denotes a reserved state.

In addition, the 8th octet and the 9th octet represent a message length and can have a maximum length of 64K (2 ¹⁶ ) octets, and a 10th octet (etc) is followed by a variable length IE .

The information elements of the SETUP message among the B-ISDN UNI messages are shown in Table 5 below.

Information element of the setup message Protocal discriminator Call reference Message type AAL parameters Broadband bearer capability Broadband high layer information Broadband repeat indicator Broadband low layer information Called party number Called party subaddress Calling party number Calling party subaddress Connection identifier End-to-end transit delay Notification indicator OAM traffic descriptor QoS parameter Broadband sending complete Transit network selection

The SETUP message includes a Calling Party Number / Calling Party Subaddress and a Called Party Number / Called Party Subaddress as shown in Table 5, The sub-address is a number allocated to distinguish the plurality of terminals when a plurality of terminals are connected to the indoor side of the subscriber.

However, in the conventional integrated information communication network, various ISDN terminals are used in the home or office. When the power of the terminal is turned off due to carelessness of the subscriber, the terminal can not receive a SETUP message from the network, There is a problem that the connection is not made.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above problems, and it is an object of the present invention to provide a method and apparatus for monitoring a subscriber-to-network line and generating a SETUP message from a network, (UNI) of an Integrated Services Digital Network (ISDN), which is capable of outputting a broadcast message if the subscriber-network interface (UNI) outputs a broadcast message.

According to an aspect of the present invention, there is provided an apparatus for outputting a broadcast message at a subscriber-network interface (UNI) of an Integrated Services Digital Network (ISDN), comprising: a ROM storing software; A table in which sub address information of a subscriber is registered; If the sub-address of the SETUP message transmitted to the ISDN terminal is the information registered in the table, the subscriber terminal having received the SETUP message transmits the set- A control unit for controlling to output a broadcast message if the ALERTING message is not output; An interface unit configured to sense a set-up message and an alerting message when the line is moved and convert the signal into a signal suitable for processing by the control unit; And a buffer for storing the signal converted by the interface unit until the control unit reads the signal.

In addition, a broadcasting message output method in a subscriber-network interface (UNI) of an integrated information network (BISDN) according to the present invention includes: a first step of continuously determining whether a SETUP message is transmitted from an exchange to a subscriber terminal; A second step of determining whether there is a sub-address in the SETUP message when the result setup message determined in the first step is transmitted; A third step of branching to the first step if there is no sub-address as a result of the determination in the second step, and if the sub-address exists, determining whether the sub-address is registered in the table; If it is determined that the sub-address is not a registered sub-address, the process branches to the first step. If the sub-address is a registered sub-address, the subscriber station that has transmitted the setup message determines whether the alerting message is transmitted to the switchboard step ; And a fifth step of branching to the first step if an ALERTING message is received as a result of the determination in the fourth step, and outputting a broadcasting message if the ALERTING message is not delivered.

That is, if a SETUP message is generated from the network and the ALERTING message is not generated from the terminal within a predetermined time, the broadcast message is output. If the subscriber is carelessly turned off, The user can recognize the power off state of the terminal through the broadcast message.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing an example of a flow of a call processing related message in a B-ISDN subscriber-network interface;

2 shows a general format of a message handling control related message in a B-ISDN subscriber-network interface,

FIG. 3 is a block diagram illustrating a broadcast message output apparatus at a subscriber-network interface of an integrated information communication network according to the present invention.

4 is a flowchart illustrating a broadcast message output method at a subscriber-network interface of an integrated information communication network according to the present invention.

* Name of designator for main part of the drawing

1: Switch 2: ISDN terminal

10: Rom 20: Table

30: control unit 40: interface unit

50: buffer 60: speaker

70: key input unit 80:

NT: Network terminal

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a block diagram illustrating a broadcast message output device at a subscriber-network interface of an integrated information communication network according to the present invention. FIG. 4 illustrates a broadcast message output method at a subscriber-network interface of an integrated information communication network according to the present invention. Fig.

3, the apparatus of the present invention includes an exchange 1, an ISDN terminal 2, a ROM 10, a table 20, a control unit 30, an interface unit 40, a buffer 50, A speaker 60, a key input unit 70, and a display unit 80.

The operation and effect of the apparatus of the present invention constructed as above will be described with reference to FIG.

The control unit 30 always monitors the line through the interface unit 40 and determines whether a setup message is transmitted from the switchboard 1 to the subscriber terminal 2 at step S1.

When the setup message is detected through the interface unit 40, the interface unit 40 converts the setup message into a signal suitable for the control unit 30 to process, and then transmits the converted signal to the controller 30 Are stored in the buffer 50 until they are read.

Accordingly, the control unit 30 reads a setup message from the buffer 50 and determines whether there is a sub-address in the setup message (S2).

The sub address refers to a number assigned to distinguish the plurality of terminals 2 when a plurality of terminals 2 are connected to a subscriber's indoor side. For example, a telephone, a facsimile, and an ISDN terminal of a computer are installed The sub-addresses are assigned to the three terminals, respectively. That is, even if a plurality of terminals 2 are installed in the subscribers' room, sub-addresses are allocated to the telephone set # 1, the facsimile # 2 and the computer # 3, This is possible.

If it is determined in the second step S2 that a sub-address exists in the setup message, it is determined whether the sub-address is registered in the table 20. If it is a registered sub-address, the corresponding subscriber station 2 To the switching center 1 (S4).

At this time, if the alerting message is not delivered within a predetermined time, the set broadcasting message is outputted through the speaker 60 (S5).

Here, the key input unit 70 is for the operator to directly enter a broadcast message and a sub-address of the subscriber. The operator can set a broadcast message through the key input unit 70, .

Also, the display unit 80 displays the setting status of the broadcast message.

As described above, the apparatus of the present invention outputs a broadcast message if a SETUP message is generated from the switchboard 1 and an ALERTING message is not generated within a predetermined time from the corresponding terminal 2 The user can recognize the power-off state of the terminal 2 through the broadcast message when the power of the terminal 2 is turned off due to carelessness of the subscriber.

Claims (2)

A ROM 10 storing software; A table 20 in which sub-address information of a subscriber is registered; If the sub-address of the setup message transmitted to the ISDN terminal is the information registered in the table 20, a predetermined sequence is performed according to the software stored in the ROM 10, A control unit (30) for controlling the subscriber station to output a broadcast message if the subscriber station does not output an ALERTING message within a predetermined time; An interface unit (40) for detecting a setup message and an alerting message when the line is moved and converting the signal into a signal suitable for processing by the control unit (30); And a buffer 50 for storing the signal converted by the interface unit 40 until the control unit 30 reads the signal. The broadcast message output apparatus comprising: A first step (S1) of determining whether a SETUP message is transmitted from the switchboard (1) to the subscriber terminal (2); A second step S2 of determining whether there is a sub-address in the setup message if the result setup message determined in the first step S1 is transmitted; A third step (S3) of branching to the first step (S1) if there is no sub-address determined as a result of the second step (S2) and judging whether the sub-address is registered in the table (2) if the sub-address exists; If the result of the determination in the third step S3 indicates that the sub-address is not registered, the process branches to the first step S1. If the sub-address is a registered sub-address, the subscriber station 2, A fourth step (S4) of judging whether or not the routing message is transmitted; If it is determined in step S4 that the ALERTING message is received, the flow branches to the first step S1. If the ALERTING message is not received, (UNI) of an Integrated Services Digital Network (ISDN).