| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method that arbitrates (arbitration) an access to (use of) an optical communication bus for a node without requiring an expensive WDM device. <P>SOLUTION: A method for arbitrating an access to an optical communication bus includes the following steps: always sending a signal onto a bus for each node (Node A, Node B, Node C and Node D) to synchronize with the signal, thus maintaining a CDR lock state, and for a node desiring to use the bus to emits light as a request bit in a pre-assigned time slot in a frame header being sent on the bus, thereby performing bus arbitration (arbitration); sending data (data) onto the bus when an access right to (use of) the bus is obtained; making each node monitor the states of light emitting; sending an idle pattern (ip) onto the bus at a predetermined timing assigned to the node; and making all nodes send the idle pattern at least once during a pre-assigned period of all the nodes to keep a DC balance of an AC coupling device. <P>COPYRIGHT: (C)2012,JPO&INPIT |
