KR980007212A

KR980007212A - A method for processing cell loss and false insertion in AAL type 1 (method for processing a sequence number to detect lost and misinserted cells in ALL type 1)

Info

Publication number: KR980007212A
Application number: KR1019960024735A
Authority: KR
Inventors: 김덕년
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1996-06-27
Filing date: 1996-06-27
Publication date: 1998-03-30

Abstract

본 발명은, AAL 타입 1의 수신된 헤더정보중 현재 셀의 순서번호(SN1;Sequence Number) 정보와 다음 셀의 순서번호(SN2) 정보를 비교하여 현재 셀의 손실 및 오삽입의 발생 여부를 판정할 수 있도록 된 AAL 타입 1에서의 셀 손실 및 오삽입 순서번호 처리방법에 있어서, 현재의 제1셀이 도착하는 제10단계(S10)와; 이 제10단계(S10)의 제1셀이 도착 후 그 다음 제2셀이 도착하는 제11단계(S11); 상기 현재 제 1셀의 순서번호와 상기 제 2셀의 순서번호를 기초로 현재 제1셀의 정상여부와 손실 및 오삽입의 발생여부에 대한 순서번호 처리 알고리즘을 수행하는 제12단계(S12) 및; 상기 제1셀의 결과에 따라 제1셀의 폐기 또는 상위계층으로 전송함과 더불어 다음 제2셀에 대한 처리를 수행하는 제13 단계(S13)로 이루어진 것을 특징으로 한다.The present invention compares SN1 (Sequence Number) information of the current cell among the received header information of AAL type 1 with SN2 information of the next cell to determine whether loss and erroneous insertion of the current cell occur or not A method for processing a cell loss and an erroneous sequence number in an AAL type 1, the method comprising: a tenth step (S10) in which a current first cell arrives; An eleventh step (S11) in which the next second cell arrives after the first cell of the tenth step (S10) arrives; A twelfth step (S12) of performing a sequence number processing algorithm on whether a current cell is normal and whether loss and erroneous insertion are generated based on the sequence number of the current first cell and the sequence number of the second cell; ; (S13) of discarding the first cell or transmitting the first cell to the upper layer according to the result of the first cell, and performing a process for the next second cell.

Description

A method for processing cell loss and false insertion in AAL type 1 (method for processing a sequence number to detect lost and misinserted cells in ALL type 1)

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제2a도는 ATM통신방식에 있어서 계층별 데이터 포맷을 나타낸 도면.Fig. 2 (a) is a diagram showing a data format for each layer in an ATM communication method; Fig.

제2b도는 제3도a에 나타낸 AAL 타입 1의 SAR 포맷을 나타낸 도면.2b shows a SAR format of AAL type 1 shown in FIG.

제3도는 본 발명에 따른 AAL 타입 1에서의 셀 손실 및 오삽입 감지를 위한 순서번호 처리방법의 동작흐름을 나타낸 동작흐름도.FIG. 3 is a flowchart illustrating an operation flow of a sequence number processing method for cell loss and false insertion in AAL type 1 according to the present invention; FIG.

제4도는 제3도에 나타낸 제11단계의 순서번호 처리알고리즘을 도시한 동작흐름도이다.FIG. 4 is an operational flowchart showing the sequence number processing algorithm of the eleventh step shown in FIG. 3.

Claims

(SN1) information of the current cell among the received header information of the AAL type 1 and the sequence number (SN2) information of the next cell to compare the information of the current cell and the sequence number A cell loss and erasure insertion sequence number handling method in AAL type 1, comprising: a tenth step (S10) in which a current first cell arrives; An eleventh step (S11) in which the next second cell arrives after the arrival of the first cell in the tenth step (S10); A twelfth step (S12) of performing a sequence number processing algorithm on whether a current cell is normal and whether loss and erroneous insertion are generated based on the sequence number of the current first cell and the sequence number of the second cell; ; And a step (S13) of performing a process for a next second cell in addition to discarding of the first cell or transmission to an upper layer according to the result of the first cell. And a sequence number processing method for false insertion detection.

The method of claim 1, wherein the twelfth step S12 comprises: a first step S1 of comparing a sequence number SN1 of a first cell input from the ATM layer with an expected sequence number Exp_SN of the first cell; A second step of outputting a first cell to an upper layer when the sequence number SN1 of the first cell matches the expected sequence number Exp_SN of the first cell as a result of the comparison in the first step S1 S2); If the sequence number SN1 of the first cell does not match the expected sequence number Exp_SN of the first cell as a result of the comparison in the first step S1, (Exp_SN) of the first cell; If the sequence number SN2 of the second cell is equal to the expected sequence number Exp_SN of the first cell as a result of the comparison in the third step S3, And; (S5) of detecting loss of a cell when the expected sequence number (Exp_SN) of the first cell does not match the sequence number (SN2) of the second cell as a result of the comparison in the third step (S3) And the cell loss and erroneous insertion detection in the AAL type 1.

3. The method of claim 2, wherein the number of lost cells in the fifth step (S5) is the number of cells between the sequence number (SN1) of the first cell and the expected sequence number (Exp_SN) of the input first cell Wherein the method comprises the steps of: detecting a cell loss and erroneous insertion in AAL type 1;