KR970056307A

KR970056307A - Primitive Handling in LAPD for ISDN User-Network Connections

Info

Publication number: KR970056307A
Application number: KR1019950052762A
Authority: KR
Inventors: 정용길; 이종대
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1995-12-20
Filing date: 1995-12-20
Publication date: 1997-07-31

Abstract

본 발명은 ISDN 사용자-망 접속의 LAPD에서 프리미티브 처리방법에 관한 것으로, 계층 2 내부에서 발생되어 수신된 I_FRAME_QU 프리미티브를 수신하는 단계(201); 상기 수신된 프리미티브의 링크 엔티티를 식별하여 해당 링크 엔티티의 현재 상태를 판별하는 단계(202,203); 상태 판별결과 설정 대기상태에서 설정을 계층 2에서 내부적으로 요구한 경우에는 I_FRAME_QU 프리미티브를 설정이 완료될 때까지 계속 발생시키는 단계(211,212); 상태 판별결과 상태 7이고, 상대측에서 수신 가능하며 V(S)〈V(A)+K이면, PH_DATA_REQ 프리미티브를 통해 I프레임을 전송한 후 V(S)를 1증가시키고 어크놀리지 팬딩 플래그를 클리어시키며 T203타이머를 정지시키고 T200타이머를 기동시키는 단계(222~228); 상태 판별결과 상태 7이고, 상대측에서 수신 불가능하거나 V(S)〈V(A)+K이 아니면, I_FRAME_QU 프리미티브를 발생하는 단계(229); 및 상태 판별결과 상태 8이면 I_FRAME_QU 프리미티브를 발생하는 단계(231)로 구성되어 처리절차를 단순화하여 처리시간을 단축할 수 있는 효과가 있다.The present invention relates to a primitive processing method in LAPD of an ISDN user-network connection, comprising: receiving (201) an I_FRAME_QU primitive generated and received in Layer 2; Identifying (202, 203) the link entity of the received primitive to determine the current state of the link entity; In the state determination result setting standby state, if the setting is internally requested by the layer 2, continuously generating the I_FRAME_QU primitive until the setting is completed (211, 212); If it is state 7 and can be received from the other side and V (S) <V (A) + K, after sending I frame through PH_DATA_REQ primitive, V (S) is increased by 1 and the Acknowledgment Pending flag is cleared. Stopping the T203 timer and starting the T200 timer (222 to 228); (229) generating an I_FRAME_QU primitive if the state discrimination result is state 7 and the other party cannot receive or V (S) < V (A) + K; And if the state is determined as the state 8, the step (231) for generating the I_FRAME_QU primitive has the effect of reducing the processing time by simplifying the processing procedure.

Description

Primitive Handling in LAPD for ISDN User-Network Connections

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제6도는 본 발명에 따라 LAPD를 구현하는 하드웨어의 예를 도시한 도면.6 illustrates an example of hardware for implementing LAPD in accordance with the present invention.

제8도는 본 발명에 적용되는 계층2에서의 환경변수 테이블을 도시한 도면.8 is a diagram showing an environment variable table in Layer 2 applied to the present invention.

제9도의 (가) 내지 (라)는 본 발명에 따른 프리미티브 처리절차를 도시한 도면.9A to 9D illustrate primitive processing procedures according to the present invention.

Claims

CLAIMS 1. A method for implementing LAPD to access an ISDN terminal according to a layered protocol in a general information communication network, the method comprising: receiving (201) generated I_FRAME_QU primitives generated in Layer 2; Identifying (202, 203) the link entity of the received primitive to determine the current state of the link entity; In the state determination result setting standby state, if the setting is internally requested by the layer 2, continuously generating the I_FRAME_QU primitive until the setting is completed (211, 212); If it is state 7 and can be received from the other side and V (S) <V (A) + K, after sending I frame through PH_DATA_REQ primitive, V (S) is increased by 1 and the Acknowledgment Pending flag is cleared. Stopping the T203 timer and starting the T200 timer (222 to 228); (229) generating an I_FRAME_QU primitive if the state discrimination result is state 7 and the other party cannot receive or V (S) < V (A) + K; And generating (I231) an I_FRAME_QU primitive if the state is determined as state 8 (step 231).

※ Note: The disclosure is based on the initial application.