Title:
PVC STATE CONFIRMATION SYSTEM IN FRAME RELAY NETWORK
Document Type and Number:
Japanese Patent JP3655673
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent the production of an aborted frame not to be reported by reporting the validity of a PVC including a state of a line with a terminal equipment contained respectively to other frame relay exchange or an FRAD.
SOLUTION: On the occurrence of a line fault between a terminal equipment a1 and an FRADa2, a frame relay exchange 3 sends a reply message ST-F for full status display from the FRAD 2 with respect to a message SEF of a full status request. The ST displays it that the DLC 132 is inactive. When the exchange 3 receives an SE-F represented by g2 from a terminal equipment (b), since the DLC 132 is inactive, as to a DLC 148 forming the PVC, the ST-F displaying to be inactive is reported to a terminal equipment 1. Since a terminal equipment b4 stops the transmission to the terminal equipment 1, occurrence of an event that the state of the terminal equipment 1 is not reported to the terminal equipment 2, the frame transmission is conducted and the generation of aborted on the way is prevented.
Inventors:
Shoji Daikichi
Application Number:
JP24761895A
Publication Date:
June 02, 2005
Filing Date:
September 26, 1995
Export Citation:
Assignee:
富士通株式会社
International Classes:
H04L12/70; H04L12/26; (IPC1-7): H04L12/56
Domestic Patent References:
| JP7087132A | ||||
| JP7297854A | ||||
| JP8316986A | ||||
| JP8046645A |
Other References:
コンピュータ&ネットワークLAN,株式会社オーム社,第13巻,第4号,第42-47頁
ITU-T Recommendation Q.933 Annex A,1995年10月
ITU-T Recommendation Q.933 Annex A,1995年10月
Attorney, Agent or Firm:
Kazuo Hosaka
Fumihiro Hasegawa
Yoshiyoshi Ogasawara
Fumihiro Hasegawa
Yoshiyoshi Ogasawara