KR100357429B1 - Dial Processing Method At User-Side In The ISDN Environment - Google Patents

Abstract

The present invention relates to a user-side dial processing method in an ISDN environment in which the user-side dial is processed only by a batch transmission method of temporarily transmitting a setup message including all address information of the called subscriber in the ISDN environment. In order to support both the batch transmission method and the overlap transmission method, the configuration is complicated and the degree of integration is low.Therefore, it is difficult to secure safety due to the high possibility of error in processing the call control signal. There was a difficult problem.

Therefore, in the ISDN environment, the user terminal does not use an overlap transmission scheme, but generates a local tone and collects all address information for the called subscriber, and then loads it in a setup message and transmits it to the switching system. By performing the dial processing, there is no need for a state to perform the overlap transmission scheme, thereby reducing the weight of the call control signal processing block, thereby reducing the possibility of an error when processing the call control signal, thereby ensuring safety as well as an additional service. It is easy to create and control.

Description

Dial Processing Method At User-Side In The ISDN Environment

The present invention relates to a user-side dial processing method in an ISDN environment, and more particularly, to a user-side dial processing method in an ISDN environment in which the user-side dial is processed only by a batch transmission method that transmits a setup message including all address information about a called party at a time. It is about.

Looking at the current ITU-T (QT) Recommendation Q series telephone exchange and its signaling method, the ISDN (Integrated Services Digital Network) is a dial-up method for processing call control signals on the user's side. It is recommended to support both Enbloc and Overlap transmission methods.

Accordingly, the user terminal performing conventional ISDN call control signal processing transmits a setup message including a called party number, which is called party address information, to the switching system of the ISDN network side and the originating call to the corresponding switching system. Call control signal processing block to support both batch transmission method that transmits all address information about called party to message and overlap transmission method that does not have address information about destination subscriber in setup message or transmits only partial address information (Q.931 block) is designed and implemented.

The call control signal processing block receives a setup message from a call processing block, which is a higher layer, and performs call processing. In this case, the call processing block receives address information of a called subscriber from a user side and configures a setup message. The dial processing operation for transmitting to the call control signal processing block is performed by performing a voice call related process in the call processing block, as shown in FIG. 1. Since there exists a procedure for confirming and a procedure for requesting the user to input address information for the called subscriber, etc., it is easy to transmit the setup message in the overlap transmission mode.

At this time, in Figure 1 briefly described a procedure for performing a call processing after receiving the address information (called party number, etc.) for the called subscriber from the user by transmitting a setup message in the overlap transmission mode to the switching system of the ISDN network side, the ISDN The switching system at the network side analyzes the setup message, requests the caller to set up the call, sends a call progress message indicating that the caller can continue to set up the call, and then the calling party and the called party answer the call. If it is connected to the call to provide a call service.

Meanwhile, the aforementioned call control signal processing block of the user terminal is designed and implemented to support both a batch transmission scheme and an overlap transmission scheme. A state management routine exists for this purpose. The managed state transition diagram is as shown in FIG. 2.

Here, the overlap transmission state u02, the overlap reception state u25, and the call progress state u09 are states for supporting an overlap transmission method for transmitting a part of address information for the called party to the switching system. Initial state (u00), call initialization state (u01), call progress state (u03), call forwarding state (u04), call attendance state (u06), call reception state (u07), connection request state (u08), call state (u10), truncation request status (u11), truncation instruction status (u12), hold request status (u15), resume request status (u17), and release request status (u19) all the address information for the called party is temporarily This is a state for supporting a batch transmission method transmitted to the switching system.

Call processing will be described with reference to the state transition diagram for call processing of the user terminal as follows. In the case of incoming calls, the description is omitted since the batch transmission scheme is always applied, and the overlap transmission scheme is applied together. The call will be described.

First, a state transition for normal call processing will be described. In the initial state (u00) where the handset of the user's telephone is placed, when the handset is lifted, a setup message having address information (telephone number, etc.) of the called subscriber is transmitted to the switching system of the ISDN network side. After that, the process proceeds to the call initialization state u01, and checks whether the setup message is complete, that is, the address information of the called party is complete.

In this case, when the setup message is not complete, the setup acknowledgment message is received from the ISDN network side to operate in the overlap transmission mode, the transition to the overlap transmission state (u02), and when the setup message is complete, the call can proceed. Receives a call progress message from the ISDN network and transitions to a call progress state (u03).

In addition, when the call progress state (u03) checks the terminal state of the called subscriber through the ISDN network, and transmits a ring signal, and receives a corresponding alerting message, it transitions to the call forwarding state (u04), and the call In the forwarding state u04, when the connection message for the call is received from the ISDN network side, the transfer state u04 transitions to the call state u10 to provide a call service.

Subsequently, if the call is held for a while in the corresponding call state (u10) and a call movement is required, a suspend message is sent to the ISDN network side, and the state is transferred to the hold request state (u15), and then the corresponding hold request state (u15). Receives a hold grant message at, suspends the call and transitions to an initial state u00 where mobility is provided.

In case of resuming a call held in the initial state (u00), a message for resumption is sent to the ISDN network side, and the transition to the resumption request state (u17) is performed, and the resumption is performed in the resumption request state (u17). Upon receiving the acknowledgment message, the terminal transitions to the call state u10 again to provide a call service.

On the other hand, when the call release procedure to terminate the call will be described, when the calling user side terminates the call first in the call state (u10), the call is transferred to the ISDN network side and then transitions to the disconnect request state (u11). When a call disconnection is performed and a release message is received from an ISDN network that releases the call, in response to the call release, a release completion message indicating normal call release completion is transmitted, and then the call returns to an initial state (u00) to terminate the call.

On the contrary, when the called user side first terminates the call in the call state u10, when the call disconnection message is received from the ISDN network side, the terminal transitions to the disconnect indication state u12, and then completes the call disconnection in the corresponding disconnect indication state u12. After performing the release message to the ISDN network side to perform the call release procedure, the UE transitions to the release request state (u19). When the release complete message indicating that the normal call release procedure is completed is received from the ISDN network side in the corresponding release request state (u19), the call returns to the initial state (u00) and terminates the call.

As described above, in the conventional ISDN environment, the user terminal is designed and implemented to support both a batch transmission method and an overlapping transmission method to process address information for the called subscriber, which is user side dial information. Falls. In addition, since the upper layer supports both the batch transmission scheme and the overlap transmission scheme, there is a high possibility that an error may occur when processing a call control signal, and it is difficult to secure safety, and it is difficult to implement additional additional functions or improve performance.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object thereof is that, in an ISDN environment, a user terminal does not use an overlapping transmission scheme and generates a local tone to collect all address information about a called subscriber and then sets up a setup message. By performing the user-side dialing process using only the batch transmission method to be transmitted to the switching system side, the state for performing the overlapping transmission method is not necessary, thereby reducing the weight of the call control signal processing block, thereby reducing the possibility of errors in the call control signal processing. It is not only to secure safety, but also to facilitate creation and control of additional services.

1 is a diagram illustrating a call processing procedure according to an overlap transmission scheme of a user terminal in a conventional ISDN environment.

2 is a state transition diagram for call processing in a conventional ISDN user side terminal.

3 is a block diagram of communication protocol layers of a user terminal in an ISDN environment according to the present invention;

4 is a diagram illustrating a call processing procedure according to a batch transmission method of a user terminal in an ISDN environment according to the present invention.

5 is a state transition diagram for call processing in an ISDN user side terminal according to the present invention.

Explanation of symbols on the main parts of the drawings

31: Call processing block 32: BM (Bundle Manager) block

33: call control signal processing block 34: D-link control signal block

A feature of the present invention for achieving the above object is that, when the dial tone is confirmed by the switching system after the handset is off-hook in the call processing block of the ISDN user side terminal corresponding to the address information for the called subscriber from the user Generating a local tone to receive a called number; Collecting a called number corresponding to address information of a called subscriber input from the user until a timeout occurs after a predetermined time elapses after generating the local tone; After configuring the setup message including all the address information for the called subscriber collected above, the setup message is transmitted to the switching system through a call control signal processing block in a batch transmission manner. It is to provide a dial processing method.

At this time, the process of collecting the address information for the called subscriber, if a specific button indicating the termination of the incoming number input before the timeout occurs, for the called subscriber input from the user until the time when the specific button is input; It is characterized by collecting the called number corresponding to the address information.

Furthermore, in the above-mentioned ISD environment, the user-side dial processing method compares the called number collected with the authorized called number when all the called numbers corresponding to the address information of the called subscriber are collected and is not authorized. Regarding the called number, a process of providing a communication security service by limiting call setup without transmitting a setup message may be included.

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

The user terminal of the ISDN environment according to the present invention intends to design and implement a call processing block to process the user side dial using only a batch transmission method among the dial processing methods supported by the call control signal processing block. Local Tone) is generated and collects all address information for the called party, and it supports only the batch transmission method that sends it to the call control signal processing block, which is a lower layer, by putting it in a setup message.

In more detail, the hierarchical configuration according to the communication protocol of the user terminal in the ISDN environment according to the present invention is as shown in Figure 3, the call processing block 31 and the BM (Bundle Manager) block ( 32, and a call control signal processing block 33 and a D-link control signal block (Q.921 block) 34.

Here, the call processing block 31, which is a higher layer, generally performs a procedure of checking a dial tone after the handset is off-hook as the voice call-related processing is performed, and requesting input of address information for the called subscriber to the user side. Since a procedure exists and it is difficult to transmit the setup message in a batch transmission method, the setup message has been transmitted in the overlap transmission mode. However, in the present invention, the setup message is collected after collecting all address information of the called subscriber from the user side. To perform a batch transmission method for transmitting to the call control signal processing block 31.

That is, the call processing block 31 implemented in the user side terminal generates a local tone to transmit a setup message in a batch transmission method when the dial tone by the switching system is confirmed after the handset is off-hooked, thereby all The user-side dialing process of collecting address information is performed. In this case, a local tone is generated until a called number, which is address information of a called subscriber input from a user, has elapsed (that is, for collecting address information). User-side dialing to collect all address information for the called party by collecting until the timeout of the timer occurs) or until a specific button (e.g. '#' button) indicating that the called party number has been completed is entered. After that, all the address information for the called party In this case, a batch transmission method for transmitting to the call control signal processing block 31 is performed.

Then, the call control signal processing block 33 receives a setup message from the call processing block 31 of the upper layer to set up, maintain and release a network connection for circuit and packet exchange through the D channel, The D-link control signal block 34 performs data link establishment, maintenance, and release through the D channel to the data link layer.

In this case, since the BM block 32 collects all address information of the called subscriber from the user side as the data call related processing is performed, it is easy to construct a setup message and transmit the setup message to the call control signal processing block 33. Dialing can be done using the batch transfer method alone.

Furthermore, a call processing procedure for a user terminal which performs dial processing only by the above-described batch transmission method will be described with reference to FIG. 4.

First, when an originating terminal, which is a user terminal, is off-hook, the call processing block 31 collects all address information of the called subscriber in order to perform dialing in a batch transmission method, and then configures a call control signal processing block by configuring a setup message. In order to do so, a predetermined local tone is generated by itself, and a called party number corresponding to the address information of the called subscriber is input from the user, but a timeout occurs after a predetermined time or the corresponding called party number is input. After collecting all the address information on the called subscriber from the user until the specific button indicating that the terminal has been terminated, the call control signal processing block 33 is configured by constructing a setup message including all address information about the collected called subscriber. Will be sent in batches.

Accordingly, the call control signal processing block 33 transmits a setup message including all address information of the called subscriber received from the call processing block 31 to the switching system of the ISDN network side.

Then, the ISDN network side exchange system analyzes the setup message, requests the call establishment to the called terminal, sends a call progress message indicating that the call can be established to the calling terminal, and then the calling terminal and the called terminal. When the call is answered, the call is connected to provide a call service.

Meanwhile, the above-described call control signal processing block 33 of the user side terminal is designed and implemented to support only the batch transmission scheme in the upper layer call processing block 31 without supporting the overlap transmission scheme. As shown in FIG. 5, the state transition diagram is a state for supporting the overlap transmission scheme in the state transition diagram shown in FIG. 2, that is, the overlap transmission state u02, the overlap reception state u25, and the call progress. Initial state (u00) excluding state (u09), call initiation state (u01), call progress state (u03), call forwarding state (u04), call attendance state (u06), call reception state (u07), connection request State u08, call state u10, cut request state u11, cut instruction state u12, hold request state u15, resume request state u17, release request state u19. .

Call processing will be described with reference to the state transition diagram for the call processing of the user terminal as follows. As in the case of the call, the description of the call processing will be omitted since the batch transmission method is always applied. Let's do it.

First, the state transition for normal call processing will be described. When the handset of the user's telephone is placed in the initial state (u00), when the handset is lifted, the ISDN network side exchanges a setup message having all address information (called telephone number, etc.) of the called subscriber. After transmitting to the call initialization state (u01), the transition to the call initialization state (u01), and in the call initialization state (u01) in the initial state (u00) because the setup message with all the address information of the called party to the switching system of the ISDN network side setup As the call proceeds without having to check whether the message is complete, the call progress message is received from the ISDN network side, and the call proceeds to the call progress state (u03).

Then, in the call progress state (u03) to check the terminal state of the called subscriber through the ISDN network to send a ring signal, when receiving the corresponding call message transitions to the call forwarding state (u04), the call forwarding state ( In u04), when the connection message for the call is received from the ISDN network, the terminal transitions to the call state u10 to provide a call service.

In this case, according to the present invention, as the call processing block 31 uses a batch transmission method in which all address information of the called subscriber is included in the setup message and transmitted, the setup message is completed in the call initialization state u01, that is, the called subscriber. The procedure for confirming whether the address information of the B is complete is unnecessary, and thus, the overlap transmission state for operating in the overlap transmission method is not required.

In addition, since a call processing procedure is necessary when the call is suspended for a while in the corresponding call state u10 and the call needs to be moved or the call is to be terminated, the description thereof will be omitted.

As described above, in the ISDN user terminal according to the present invention, the state for performing the overlap transmission method is deleted as the dial processing is performed only by the batch transmission method, thereby reducing the weight of the call control signal processing block 33 and the efficient use of the memory. This reduces the possibility of errors in processing call control signals, ensuring safety, and facilitating the implementation or performance enhancement of additional add-ons.

That is, by receiving a complete setup message including all address information of the called party from the upper layer call processing block 31 and performing call control signal processing, additional service creation and control are facilitated and the protocol is optimized. This makes it easier to integrate with other layers.

For example, the user terminal sends a complete setup message containing all the address information for the called party at once, so it can be easily applied when making a security setting that permits the use of the telephone only for the authorized called number. After collecting all the called numbers corresponding to the address information of the called party from the user, and comparing the collected called numbers with the allowed called numbers, the user does not transmit the setup message for the unauthorized called numbers without transmitting the setup message. It can connect to a security database or security system to provide a communication security service that limits call setup.

In addition, the embodiments according to the present invention are not limited to the above-described embodiments, and various alternatives, modifications, and changes can be made without departing from the scope of the present invention.

As described above, the present invention is a batch transmission scheme in which a user terminal does not use an overlap transmission scheme in an ISDN environment, generates a local tone, collects all address information for a called subscriber, and then transmits it to a setup message in a setup message. By only performing the user-side dialing process, the state for performing the overlap transmission method is not necessary, thereby reducing the weight of the call control signal processing block, thereby reducing the possibility of an error in processing the call control signal, thereby ensuring safety. It is easy to create and control additional services.

Claims (3)

Generating a local tone from a user to receive a called number corresponding to address information for the called subscriber when the dial tone by the switching system is confirmed after the handset is off-hook in the call processing block of the ISDN user terminal; Collecting a called number corresponding to address information of a called subscriber input from the user until a timeout occurs after a predetermined time elapses after generating the local tone; And configuring the setup message including all the address information of the called subscriber collected above, and transmitting the setup message to the switching system through a call control signal processing block in a batch transmission method. How to handle user side dialing in Yen environment. The method of claim 1, In the process of collecting address information on the called subscriber, when a specific button indicating the termination of the incoming call number input is input before a timeout occurs, the address information on the called subscriber input from the user until the time at which the specific button is input is input. The user-side dial processing method in the ISDN environment, characterized in that for collecting the called number corresponding to. The method according to claim 1 or 2, When all the called numbers corresponding to the address information of the called subscriber are collected, the called numbers collected above are compared with the allowed called numbers, and the call setting is restricted without transmitting a setup message for the unauthorized called numbers. A method of handling a user side dial in an ISD diene environment comprising the step of providing a communication security service.