KR20030055895A - method for ISDN call terminating processing - Google Patents

method for ISDN call terminating processing Download PDF

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KR20030055895A
KR20030055895A KR1020010086021A KR20010086021A KR20030055895A KR 20030055895 A KR20030055895 A KR 20030055895A KR 1020010086021 A KR1020010086021 A KR 1020010086021A KR 20010086021 A KR20010086021 A KR 20010086021A KR 20030055895 A KR20030055895 A KR 20030055895A
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tei
physical layer
release
isdn
delivers
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KR1020010086021A
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Korean (ko)
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박재완
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삼성전자주식회사
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Publication of KR20030055895A publication Critical patent/KR20030055895A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
    • H04Q11/0435—Details
    • H04Q11/0457—Connection protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1327—Release and resetting of connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13521—Indexing scheme relating to selecting arrangements in general and for multiplex systems fault management

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)

Abstract

PURPOSE: A method for processing an ISDN(Integrated Services Digital Network) call end is provided to first check whether a TEI(Terminal Endpoint Identifier) is successfully released, and then to sequentially perform a physical layer deactivation procedure, so as to solve a problem that only the physical layer deactivation procedure is performed in a TEI-unreleased state upon the ISDN call end. CONSTITUTION: A call processor(31) delivers a TEI release request signal to an LE(Local Exchanger)(32)(S11). The LE(32) delivers the TEI release request signal to an NT(Network Terminal)(10) through an AN(Access Network)(20)(S12). The NT(10) disconnects a subscriber and delivers a TEI release acknowledgement signal to the LE(32) through the AN(20)(S13). The LE(32) delivers the TEI release acknowledgement signal to the call processor(31)(S14). The call processor(31) delivers a physical layer deactivation request signal to the LE(32)(S15). The LE(32) delivers the physical layer deactivation signal to the AN(20)(S16). The AN(20) deactivates a physical layer and delivers a physical layer deactivation acknowledgement signal to the LE(32)(S17). And the LE(32) delivers the physical layer deactivation acknowledgement signal to the call processor(31)(S18).

Description

아이에스디엔 호 종료 처리방법{method for ISDN call terminating processing}Method for ISDN call terminating processing

본 발명은 ISDN 호 종료 처리방법에 관한 것이다.The present invention relates to an ISDN call termination processing method.

종래의 경우, V5.2인터페이스를 이용한 ISDN호의 처리절차에서, ISDN호의 종료시 물리계층의 비활성화와 TEI(Terminal Endpoint Indentifier) 해제 절차를 동시에 수행하고 있다.Conventionally, in the ISDN call processing procedure using the V5.2 interface, the deactivation of the physical layer and the termination of the terminal endpoint identifier (TEI) are simultaneously performed at the end of the ISDN call.

도 1은 종래의 교환기에서 ISDN 호를 종료하는 절차를 설명하기 위한 시스템 구성 블록도이다. 도 1을 참조하면, ISDN 교환시스템은 가입자 단말기의 TEI 해제를 수행하는 ISDN NT(Network Terminal)(1)와, 물리계층의 비활성화를 V5.2 인터페이스를 통해 수행하는 AN(Access Network)(2)와, ISDN 호처리를 수행하는 교환기(3)를 포함하여 구성된다.1 is a system block diagram illustrating a procedure for terminating an ISDN call in a conventional exchange. Referring to FIG. 1, the ISDN switching system includes an ISDN NT (Network Terminal) 1 performing TEI release of a subscriber station, and an AN (Access Network) 2 performing deactivation of a physical layer through a V5.2 interface. And an exchange 3 for performing ISDN call processing.

도 2는 이와 같은 종래의 ISDN 교환 시스템에서 이루어지는 ISDN 호종료 처리절차의 흐름을 나타낸다. 도시된 바와 같이 가입자 단말기의 ISDN 호를 종료시키고자 할 때, 교환기(3)에서는 NT(1)에 TEI 해제를 요구하여 TEI 해제를 수행하고(S1), 이와 동시에 AN(2)에 물리계층의 비활성화를 요구하여 물리계층을 비활성화시킨다(S2).Figure 2 shows the flow of ISDN call termination processing procedure performed in such a conventional ISDN exchange system. As shown, when the ISDN call of the subscriber station is to be terminated, the switchboard 3 requests the NT 1 to release the TEI to perform the TEI release (S1), and at the same time the AN2 to the AN 2 Deactivation is requested to deactivate the physical layer (S2).

따라서, 교환기(3)에서 물리계층의 비활성화와, TEI 해제를 요구하는 경우, 먼저, NT(1)에서 TEI 해제가 실행된 후, AN(Access Network)(2)에서 물리계층의 비활성화가 V5.2 인터페이스를 통해 실행되어지는 것이 정상적인 호종료 처리 절차이다.Therefore, when the exchange 3 requires the deactivation of the physical layer and the TEI release, first, after the TEI release is performed in the NT 1, the deactivation of the physical layer in the AN (Access Network) 2 is performed. Running through the interface is the normal call termination procedure.

그러나, 교환기(3)에서 ISDN 호를 종료할 때 물리계층의 비활성과 TEI 해제절차를 동시에 진행함에 따라, 물리적인 회선의 여러 가지 장애발생 요인이 있을 수 있음에 따라 TEI 해제가 NT(1)에서 실행되기 전에 AN(2)에서 먼저 비활성화 절차가 실행되는 경우, NT(1)가 TEI 해제와 관련된 메시지를 교환기(3)로부터 수신하지 못함으로써 교환기(3)가 요구한 TEI 해제 절차를 정상적으로 수행할 수 없는 문제점이 있다.However, as the exchange (3) terminates the ISDN call at the same time as the physical layer deactivation and the TEI release procedure proceeds simultaneously, the TEI release may occur in the NT (1) as there may be various obstacles to the physical circuit. If the deactivation procedure is first executed in AN (2) before execution, then NT (1) will not normally receive a message relating to TEI release from exchange 3, so that the exchange 3 would normally perform the TEI release procedure requested. There is no problem.

본 발명은 이러한 종래의 문제점을 해결하기 위하여 안출된 것으로, 교환기에서 ISDN호의 종료시 물리계층의 비활화 절차가 TEI 해제 절차를 AN의 비활성화 시점을 고려하여 정상적으로 수행되도록 하는 ISDN 호 종료 처리 방법을 제공하는데 그 목적이 있다.The present invention has been made to solve such a conventional problem, to provide an ISDN call termination processing method for the physical layer inactivation procedure is normally performed in consideration of the deactivation point of the AN TEI release procedure when the ISDN call is terminated at the exchange. The purpose is.

도 1은 일반적인 ISDN 시스템의 구성 블록도.1 is a block diagram of a typical ISDN system.

도 2는 도 1의 ISDN 시스템에서 수행되는 ISDN 호종료 처리 절차를 나타낸 개념도.FIG. 2 is a conceptual diagram illustrating an ISDN call termination processing procedure performed in the ISDN system of FIG. 1. FIG.

도 3은 본 발명에 따른 ISDN 호종료 처리 절차를 수행하기 위한 시스템의 구성 블록도.3 is a block diagram of a system for performing an ISDN call termination processing procedure according to the present invention;

도 4는 본 발명에 따른 ISDN 호종료 처리 절차를 나타낸 개념도.4 is a conceptual diagram showing an ISDN call termination processing procedure according to the present invention.

도 5는 도 3에 도시된 호처리부에서 호종료 처리 절차를 수행하는 흐름도.FIG. 5 is a flowchart of a call termination process performed by the call processing unit shown in FIG. 3.

*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

10 : NT(Network Terminal)20 : AN(Access Network)10: NT (Network Terminal) 20: AN (Access Network)

30 : 교환기31 : 호처리부30 exchanger 31 call processing unit

32 : LE(Local Exchanger)32: LE (Local Exchanger)

이러한 목적을 달성하기 위한 본 발명에 따른 ISDN 호 종료 처리방법의 일측면에 의하면, ISDN 네트워크 단말장치 및 액세스 네트워크에 대한 교환기의 ISDN 호 종료 처리방법에 있어서, 네트워크를 통하여 ISDN 네트워크 단말장치에 TEI 해제를 요구하는 단계와, 그 TEI 해제의 요구에 따라 ISDN 네트워크 단말장치로부터 전송되는 TEI 해제 확인신호 수신 여부를 판단하는 단계와, TEI 해제 확인신호가 수신되는 경우, 네트워크 단말장치에 상응하는 액세스 네트워크에 물리계층 비활성화를 요구하는 단계와, 액세스 네트워크로부터 물리계층 비활성화 확인신호를 수신하는 경우, 호 종료 처리를 완료하는 단계를 포함한다.According to one aspect of the ISDN call termination processing method according to the present invention for achieving the above object, in the ISDN network terminal and the ISDN call termination processing method of the exchange for the access network, TEI release to the ISDN network terminal through the network Requesting, determining whether to receive a TEI release acknowledgment signal transmitted from an ISDN network terminal device according to the request of the TEI release, and, if a TEI release acknowledgment signal is received, accessing an access network corresponding to the network terminal device. Requesting physical layer deactivation and completing a call termination process when receiving a physical layer deactivation confirmation signal from the access network.

이하, 첨부한 도면을 참조하여 본 발명을 상세히 설명하도록 하자.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 3은 본 발명에 따른 ISDN 호 종료동작을 수행하기 위한 시스템 구성 블록도이다. 도 3을 참조하면, 본 발명에 따른 ISDN 호 종료 동작을 수행하기 위하여 , 교환기(30)내에 ISDN 호처리부(31)와, AN(20)과 연동하는 로컬 익스체인저(Local Exchanger: 이하 LE라 칭함)(32)를 구비한다.3 is a system configuration block diagram for performing an ISDN call termination operation according to the present invention. Referring to FIG. 3, in order to perform an ISDN call termination operation according to the present invention, an ISDN call processing unit 31 in an exchange 30 and a local exchanger interworking with the AN 20 are referred to as LEs. 32).

호처리부(31)는 ISDN 호종료를 수행할 때, 먼저 TEI 해제 명령을 요청하여, 그 TEI 해제 명령에 따라 TEI 해제가 성공적으로 이루어졌음을 확인하는 신호(ACK)를 수신한 다음에, 물리계층의 비활성화 명령을 요청하고, 물리계층의 비활성화가 정상적으로 이루어졌음을 확인하는 신호(ACK)가 수신되면 호종료 절차를 완료한다.When performing the ISDN call termination, the call processing unit 31 first requests a TEI release command, receives a signal ACK confirming that TEI release has been successfully performed according to the TEI release command, and then physical layer If a signal (ACK) is received to confirm that the deactivation command of the physical layer is normally performed, the call termination procedure is completed.

LE(32)는 호처리부(31)와 AN(20) 및 NT(10)간의 인터페이스를 수행하여 호처리부(31)의 호종료처리 명령을 전달하고 그에 따른 확인 신호(ACK)를 AN(20) 및 NT(10)로부터 수신하여 호처리부(31)에 전달하는 기능을 수행한다.The LE 32 performs an interface between the call processing unit 31 and the AN 20 and the NT 10 to transmit the call termination processing command of the call processing unit 31 and transmits an acknowledgment signal ACK accordingly. And it receives from the NT (10) performs a function to deliver to the call processing unit (31).

도 4는 도 3에 도시된 시스템 구성에 따른 ISDN 호 종료절차의 흐름도이다. 도 4를 참조하여 ISDN의 호종료 절차를 설명해보자.4 is a flowchart of an ISDN call termination procedure according to the system configuration shown in FIG. Referring to Figure 4 describes the call termination procedure of ISDN.

호처리부(31)에서 LE(32)로 TEI 해제 요구신호를 전달한다(S11). LE(32)는 이 TEI 해제 요구신호를 AN(20)를 통하여 NT(10)에 전달한다(S12). NT(10)에서는 교환기의 TEI 해제 요구신호에 따라 가입자와의 연결을 해제한 다음 TEI 해제 확인 신호(ACK)를 AN(20)를 통하여 LE(32)로 전달한다(S13). LE(32)는 이 TEI 해제 ACK를 호처리부(31)에 전달한다(S14). 호처리부(31)에서는 TEI 해제가 정상적으로 이루어졌음을 확인함에 따라, 물리계층의 비활성화를 수행하기 위해 LE(32)로 물리계층 비활성화 요구신호를 전달한다(S15). LE(32)는 이 물리계층 비활성화 요구신호를 AN(20)에 전달한다(S16). AN(20)에서는 이 물리계층 비활성화 요구신호에 따라 물리계층을 비활성화한 후 물리계층 비활성화 확인신호(ACK)를 LE(32)로 전달한다(S17). LE(32)는 이 물리계층 비활성화 ACK를 호처리부(31)에 전달한다(S18). 호처리부(31)에서는 이 물리계층 비활성화 ACK를 수신하면, ISDN호 종료가 성공적으로 이루어졌음에 따라 모든 호종료 절차를 완료한다.The call processor 31 transmits a TEI release request signal to the LE 32 (S11). The LE 32 transmits this TEI release request signal to the NT 10 via the AN 20 (S12). The NT 10 releases the connection with the subscriber according to the TEI release request signal of the exchange, and then transfers the TEI release confirmation signal ACK to the LE 32 through the AN 20 (S13). The LE 32 transmits this TEI release ACK to the call processor 31 (S14). As the call processor 31 confirms that the TEI is released normally, the call processor 31 transmits a physical layer deactivation request signal to the LE 32 to perform deactivation of the physical layer (S15). The LE 32 transmits this physical layer deactivation request signal to the AN 20 (S16). The AN 20 deactivates the physical layer according to the physical layer deactivation request signal and then transmits a physical layer deactivation confirmation signal ACK to the LE 32 (S17). The LE 32 transmits this physical layer deactivation ACK to the call processor 31 (S18). Upon receiving this physical layer deactivation ACK, the call processing unit 31 completes all call termination procedures as successful termination of the ISDN call.

도 5는 ISDN 호처리부의 동작 흐름도이다. 도 3을 참조하여 ISDN 호처리부(31)의 동작 흐름을 살펴보자.5 is an operation flowchart of the ISDN call processing unit. Referring to FIG. 3, the operation flow of the ISDN call processor 31 will be described.

우선, ISDN 호처리부(31)에서는 LE(32)를 통해 NT(10)로 TEI해제를 요구한다(S21). TEI 해제를 요구한 다음에 호처리부(31)는 대기모드를 수행하면서 계속적으로 LE(32)를 모니터링하여 LE(31)로부터 TEI 해제 확인신호가 수신되는지의 여부를 판단한다(S22). 만일 LE(32)로부터 TEI해제 요구에 대한 확인신호(ACK)가 수신되는 경우에는 TEI 해제가 성공적으로 이루어졌음에 따라, 물리계층을 비활성화하기 위한 명령을 LE(32)를 통해 AN(20)으로 전송한다(S23). 역시 대기모드를 수행하면서 계속적으로 LE(32)를 모니터링하여 LE(32)로부터 물리 계층 비활성화 확인신호(ACK)가 수신되는지의 여부를 판단한다(S24). 만일 LE(32)로부터 물리계층 비활성화 확인신호가 수신되는 경우에는 물리계층의 비활성화가 성공적으로 이루어졌음에 따라 ISDN 호를 종료한다.First, the ISDN call processor 31 requests the TEI release from the NT 10 via the LE 32 (S21). After requesting the TEI release, the call processor 31 continuously monitors the LE 32 while performing the standby mode to determine whether the TEI release confirmation signal is received from the LE 31 (S22). If the acknowledgment signal (ACK) for the TEI release request is received from the LE 32, as the TEI release is successfully performed, a command to deactivate the physical layer is sent to the AN 20 through the LE 32. It transmits (S23). Also, while performing the standby mode, the LE 32 is continuously monitored to determine whether the physical layer deactivation confirmation signal ACK is received from the LE 32 (S24). If the physical layer deactivation confirmation signal is received from the LE 32, the ISDN call is terminated according to the successful deactivation of the physical layer.

본 발명에 의하면, 교환기에서 ISDN호의 종료시 TEI 해제 절차를 요청하여 TEI 해제가 성공적으로 수행되었음을 확인한 상태에서, 순차적으로 물리계층의 비활화 절차를 수행함에 따라, ISDN호의 종료시 TEI 해제가 이루어지지 않은 상태에서 물리계층만 비활성화되던 종래의 문제점을 해결할 수 있다.According to the present invention, in the state in which the exchange requests the TEI release procedure at the end of the ISDN call and confirms that the TEI release is successfully performed, the TEI release is not performed at the end of the ISDN call by sequentially performing the deactivation procedure of the physical layer. The conventional problem that only the physical layer is deactivated can be solved.

Claims (2)

ISDN 네트워크 단말장치 및 액세스 네트워크에 대한 교환기의 ISDN 호 종료 처리방법에 있어서,A method for processing ISDN call termination by an exchange for an ISDN network terminal device and an access network, 네트워크를 통하여 상기 ISDN 네트워크 단말장치에 TEI 해제를 요구하는 단계와,Requesting TEI release from the ISDN network terminal through a network; 상기 TEI 해제의 요구에 따라 상기 ISDN 네트워크 단말장치로부터 전송되는 TEI 해제 확인신호 수신 여부를 판단하는 단계와,Determining whether to receive a TEI release acknowledgment signal transmitted from the ISDN network terminal device according to the request for TEI release; 상기 TEI해제 확인신호가 수신되는 경우, 상기 네트워크 단말장치에 상응하는 액세스 네트워크에 물리계층 비활성화를 요구하는 단계와,When the TEI release confirmation signal is received, requesting physical layer deactivation from an access network corresponding to the network terminal device; 상기 액세스 네트워크로부터 물리계층 비활성화 확인신호를 수신하는 경우 호 종료 처리를 완료하는 단계를 포함하는 ISDN 호 종료 처리방법.And completing call termination processing when receiving a physical layer deactivation confirmation signal from the access network. 제 1항에 있어서, 상기 TEI 해제를 요구하는 단계에서,The method of claim 1, wherein in the step of requesting the TEI release: 상기 네트워크는, 교환기내에 구성되는 로컬 익스체인저를 포함하는 ISDN 호 종료 처리방법.And said network comprises a local exchanger configured in the exchange.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08293896A (en) * 1995-04-20 1996-11-05 Nec Corp Method and device for notification of completion of data communication in isdn terminal
KR19990053502A (en) * 1997-12-24 1999-07-15 전주범 Truncation Response Message Processing Method according to Delay Compensation Protocol of Integrated Information Communication Network
KR20000061834A (en) * 1999-03-31 2000-10-25 이계철 Method of V5.2 startup process
KR20010027943A (en) * 1999-09-16 2001-04-06 서평원 method for switch over communication path of V5.2 ISDN call

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08293896A (en) * 1995-04-20 1996-11-05 Nec Corp Method and device for notification of completion of data communication in isdn terminal
KR19990053502A (en) * 1997-12-24 1999-07-15 전주범 Truncation Response Message Processing Method according to Delay Compensation Protocol of Integrated Information Communication Network
KR20000061834A (en) * 1999-03-31 2000-10-25 이계철 Method of V5.2 startup process
KR20010027943A (en) * 1999-09-16 2001-04-06 서평원 method for switch over communication path of V5.2 ISDN call

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