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특허 상세정보

MyON담기
내보내기 페이스북 공유 카카오톡 공유

Preservation of CRC integrity upon intentional data alteration during message transmission

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) H03M-013/00   
미국특허분류(USC) 371/53 ; 371/202 ; 371/371
출원번호 US-0263310 (1988-10-27)
발명자 / 주소
  • Irvin David R. (Raleigh NC) Sy Kian-Bon (Cary NC)
출원인 / 주소
  • International Business Machines Corp. (Armonk NY 02)
인용정보 피인용 횟수 : 66  인용 특허 : 0
초록
▼

In complex networks, data frames may be routed through different systems having different frame or addressing requirements. When the frames are transferred or bridged between such systems, known changes may have to be made in the frame contents to accommodate these requirements. To maintain the integrity of error checking provided by Cyclical Redundancy Checking (CRC) techniques, a system receiving a frame uses an improved Frame Check Sequence value modification technique which modifies a Frame Check Sequence (FCS) field value only as a function of the k...

대표
청구항
▼

A method of maintaining the integrity of data contained in data frames being routed along a path through a data communications system, said method comprising the steps of: calculating a frame check sequence value for each frame at the originating station as a function of the value of selected fields in the frame; and modifying the frame check sequence value at each intermediate station on the path as a function of the intended changes to be made at that station in those selected fields said modifying step being performed independently of actual changes m...

이 특허를 인용한 특허 (66)

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