EP 0974215 A2 20000126 - DATA COMMUNICATION LINK IN A HIERARCHICAL COMMUNICATIONS NETWORK WITH A BUS, OPERATED USING AN INTERROGATION/RESPONSE PROTOCOL, THE SO-CALLED POLLING PROTOCOL
DATA COMMUNICATION LINK IN A HIERARCHICAL COMMUNICATIONS NETWORK WITH A BUS, OPERATED USING AN INTERROGATION/RESPONSE PROTOCOL, THE SO-CALLED POLLING PROTOCOL
DATENKOMMUNIKATIONSVERBINDUNG IN HIERARCHISCHEM KOMMUNIKATIONSNETZ MIT BUS, DIE NACH EINEM ABFRAGE/ANTWORT-PROTOKOLL, DEM SOGENANNTEN POLLING-PROTOKOLL, BETRIEBEN WIRD
LIAISON DE COMMUNICATION DE DONNEES DANS UN RESEAU DE COMMUNICATION HIERARCHIQUE A BUS, FONCTIONNANT SELON UN PROTOCOLE DEMANDE/REPONSE, A SAVOIR SELON LE "PROTOCOLE D'APPEL SELECTIF"
- DE 9800710 W 19980311
- DE 19714761 A 19970410
[origin: DE19714761A1] The invention relates to a data communication link in a hierarchical communication network with a bus, operated according to a polling protocol. Communication elements are arranged in the communications network in several hierarchically classified levels. Optionally, the bus contains hops consisting per se of non-busable point-to-point links. Communication elements are basically fitted with one connecting port each for connection with the upper and lower hierarchical level. The communication elements (KE B1, KE B2) used in the second highest hierarchical level (B) are provided with an interface with the lower level (C) that can be switched in the active direction and an interface with the higher hierarchical level (A). The communications elements (KE C1-3) used in the third highest hierarchical level (C) are provided with an interface with the higher hierarchical level (B) than can be switched in the active direction and an interface with the lower hierarchical level (D). When operating in the second highest hierarchical level, the communication elements are actuated with a permanently adjusted, activated interface in the direction of the lower hierarchical level (C).
IPC 8 full level
CPC (source: EP)
Citation (search report)
See references of WO 9845983A3
Designated contracting state (EPC)
CH DE ES FR GB IT LI SE
DOCDB simple family (publication)
DOCDB simple family (application)
DE 19714761 A 19970410; DE 9800710 W 19980311; EP 98921352 A 19980311