System for controlling delays in a ring by assembling subframes

Details System for controlling delays in a ring by assembling subframes System for controlling delays in a ring by assembling subframes

1995-11-02

1998-07-07

Lee, Thomas C.

39520039, 39520051, 39520064, 39520078, 39520081, G06F 1300, G06F 1516, H04L 1243

Patent

active

057781885

ABSTRACT:
In a ring transmission path, a synchronous multiplexing technique using pointer control is employed. To stabilize pointer values, at least one node is set as a master node. At the master node, the amount of delay by which to delay transmit data is made variable in order to place the transmit data in a fixed position in a transmitted frame regardless of its position in a received frame. At other nodes, the position of the transmit data in the transmitted frame is made variable in order to delay the transmit data by a fixed amount of delay. When the master node is bypassed because of a failure of the master node, etc., the adjacent node downstream detects that state and switches, automatically, to a master node.

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