摘要:
In communication method for communicating via a transmission channel to which first communication apparatuses communicating based on a first communication system, second communication apparatuses communicating based on a second communication system, and third communication apparatuses communicating based on a third communication system are connected, a data transmission domain and a notification domain for notifying a data transmission within the data transmission domain are allocated to the first communication apparatuses, the second communication apparatuses, and the third communication apparatuses, respectively. In the communication method, notices of the data transmission for each of the first communication apparatuses, the second communication apparatuses and the third communication apparatuses are transmitted within the notification domain, and the data transmission domain is reallocated in accordance with the notices transmitted from the first, second and third communication apparatuses.
摘要:
Die vorliegende Erfindung betrifft ein verteiltes Echtzeitsystem, bestehend aus einer Vielzahl von Rechnern (Rechner 111 , 112 , 113 , 114 ), die über einen zentralen Switch ( 120 ) verbunden sind und wo jeder Rechner periodisch Echtzeitnachrichten mit Echtzeitdaten an die anderen Rechner senden kann, und wo zwischen sensiblen und nicht sensiblen Echtzeitnachrichten unterschieden wird, und wo die sensiblen Echtzeitnachrichten die sensible Echtzeitdaten erhalten durch eine a priori festgelegte Kennung im Datenfeld gekennzeichnet sind, und wo alle Rechner Zugriff auf eine gemeinsame sparse Zeitbasis haben und wo jeder Rechner über mindestens einen geheimen asymmetrischen Schlüssel zur Erstellung einer Signatur einer Datenstruktur verfügt, und wo der Schlüssel zur Überprüfung der Signatur der Öffentlichkeit bekannt ist, wobei der Switch ( 120 ) alle sensiblen Echtzeitnachrichten neben dem in der Echtzeitnachricht vermerkten Empfänger auch zusätzlich an einen ausgezeichneten Rechner, den sogenannten Security Server ( 114 ), sendet.
摘要:
The invention relates to a communication device for a participant of a communication network of coequal participants having a communication unit and a control unit. The received messages are evaluated in regards to a rule conformity. If a message does not correspond to a certain rule, a deactivation signal is sent to the sender of the message.
摘要:
The invention relates to a method for establishing communication plans for a divided real-time computer system comprising remote communication computers, wherein a) a raster (RAS) is established, said raster containing all the parameters which are necessary to provide a principle communication between nodes (KR1...KR5) of a cluster (CLU), b) node communication plans (KPG; KP1, KP2) for all planted nodes as identical parts (KR2; KR2, KR3) are derived from the raster (RAS) and all of the parameters of the raster are taken and the node-specific parameters are added and c) cluster-communication plans (CP1, CP2; CM, CL2) are derived from the node communication plans (KPG; KP1, KP2), which also contain, in addition to all of the parameters of the raster and the node-specific parameters of the identical parts, the parameters which relate to remaining nodes of the cluster.
摘要:
The aim of the invention is to secure the authenticity and integrity of real-time data in a distributed real-time computer system. Said aim is achieved by a method that takes into account the special requirements of real-time data processing such as the timeliness of real-time data transmission and the limited availability of resources. Frequently changing an asymmetrical pair of keys prevents hackers from cracking a key before said key is no longer valid. Said method can also be extended to ensure confidentiality of real-time data and can likewise be efficiently implemented on a multiprocessor system-on-chip (MPSoC).
摘要:
The invention relates to a system comprising an apparatus and a plurality of remote controls. Each remote control is equipped with a detector for detecting infrared signals from the other remote controls. The remote controls are capable of controlling the transmission of messages in dependence on a detection of signals from the other remote controls. In this way collision between signals from different remote controls is prevented.
摘要:
The invention relates to a local network, particularly an Ethernet network having redundancy properties, in which coupling devices (K1, K2, K3) and a redundancy manager (RM) are interconnected in a ring-shaped topology. The redundancy manager opens the ring to create a linear topology if test messages (T11, T12) which said redundancy manager emitted are received at the other port (P42, P41) within a given period of time, otherwise the redundancy manager closes the connection. At least one of the coupling devices (K3) is configured as a so-called redundancy manager observer, which monitors the status of the network by means of test messages (T21, T22) emitted by said redundancy manager observer. The redundancy manager observer also opens the ring to create a linear topology if the test messages (T21, T22) thereof are received at the other port (P32, P31) within a given period of time, otherwise the redundancy manager observer closes the connection, whereby messages are prevented from circulating on the ring.