SAFE START-UP OF A NETWORK
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Abstract
A method for start-up of a network, including a number of nodes, which are connected via channels. The nodes exchange information in the form of messages via the channels. The transition phase of a synchronizing node from its initial phase to a synchronized phase is separated in a first integration phase and a second subsequent cold-start phase. A synchronizing node in the integration phase listens to messages being sent from nodes in the synchronized phase and only reacts to an integration message (i-frame) if the integration message is a valid message. Furthermore, a synchronizing node, wherein integration of the synchronizing node to a set of already synchronized nodes was not successful after a specifiable period, changes into the cold-start phase, in which a cold-start procedure of the node is extracted, wherein in the cold-start phase the node does not react to integration messages of a node in the synchronized phase.
54 Citations
40 Claims
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1-20. -20. (canceled)
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21. A method for start-up of a network, the network comprising a number of nodes, which are connected via channels, and wherein the nodes are able to exchange information in the form of messages via said channels,
wherein the transition of a synchronizing node from its initial phase to a synchronized phase is separated in a so-called integration phase and a so-called cold-start phase, wherein the integration phase and the cold-start phase are executed in sequence in the same node, and wherein a) the synchronizing node in the integration phase is listening to messages being sent from nodes in the synchronized phase and wherein the synchronizing node reacts to an integration message (i-frame), which is instructing a node to change into the synchronized phase, only if said integration message is a valid message, and wherein b) said node in integration phase is capable of receiving a sequence of i-frames, and wherein c) a synchronizing node, in the case that integration of said synchronizing node to a set of already synchronized nodes was not successful after a specifiable period, changes into the cold-start phase, in which a cold-start procedure of the node is executed, and wherein d) in the cold-start phase said node does not react to integration messages (i-frames) of a node in the synchronized phase, and wherein e) in the cold-start phase said node is capable of triggering a transition back to the integration phase when an i-frame is received or after a number of unsuccessful coldstart attempts, and wherein f) in the cold-start phase said node is capable of counting the number of messages received per TDMA round.
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33. A method for controlling start-up of a network, the method comprising:
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receiving a message from one node of a plurality of nodes at a guardian while the network is in an unsynchronized state, relaying the message to the other nodes of the plurality of nodes, and when the network remains in an unsynchronized state, blocking all messages from the one node of the plurality of nodes until a specifiable period of time has lapsed, wherein the contents of the one message received form the one node is analyzed and wherein the duration of said specifiable period of time is longer than a fixed system parameter. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40)
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Specification