Initialization and synchronization method for a two-way communication link
AssigneeData General Corporation
InventorsJohn D. Allen, Jeffrey V. Hill
Life of this patent
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Abstract
An initialization or synchronization method in which at least a predetermined number of synchronization messages are sent out over a two-way communication line. The receipt of a synchronization message is awaited before terminating the transmission of synchronization message. After the transmission of synchronization messages has been terminated the receipt of a non-synchronization message will complete the synchronization process. However, certain conditions may cause synchronization to be restarted such as a predetermined number of consecutive error messages, failure to receive any message in a predetermined number of clock signals, receiving more than a predetermined number of synchronization signals, or a reset command.
Claims12
A method for initializing a communication link between a first and a second interface comprising the steps of:
- comparing, at said first interface, incoming signals from said second interface with a synchronization signal;
- transmitting at least a first predetermined number of synchronization signals from said first interface;
- detecting an incoming synchronization signal when an incoming signal is identical to said synchronization signal;
- terminating the transmission of synchronization signals from said first interface after both an incoming synchronization signal has been detected and said first predetermined number of synchronization signals has been transmitted;
- and
- generating an available signal at regular intervals following the detection of an incoming synchronization signal.
A method for synchronizing a first and second interface on a communication link comprising the steps of:
- (a) receiving an incoming synchronization signal from said second interface;
- (b) then transmitting at least a first predetermined number of synchronization signals from said first interface;
- (c) receiving a second incoming synchronization signal from said second interface;
- (d) terminating the transmission of synchronization signals from said first interface after both a second incoming synchronization signal has been received and said first predetermined number of synchronization signals has been transmitted;
- and
- (e) generating an available signal at regular intervals following the reception of the second incoming synchronization signal.
Dependencies are inferred from the claim text.