Apparatus for detecting and controlling loss of ATM cell
AssigneeFujitsu Limited
InventorHitomi Akiyoshi
Life of this patent
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Abstract
An ATM switching system has a receiving unit for receiving an ATM cell, reassembling it into a frame and temporarily storing a buffer memory with this frame. When the receiving unit receives the cell, there is discriminated whether the cell is a continuous in-receipt cell or a last cell. A cell-to-cell receiving time or a receiving time between a head cell and the last cell is monitored. When this receiving time exceeds a set time, a determination is that the cell loss is detected. Invalid holding of a buffer memory is restrained by releasing the buffer memory.
Claims8
An ATM switching equipment comprising:
- segmenting/reassembling means for segmenting an ATM cell received and reassembling it into frame data;
- a buffer memory for temporarily storing the reassembled frame data;
- discriminating means for discriminating whether the received cell is an intermediate cell or a last cell;
- monitoring means for monitoring a cell-to-cell receiving time or a receiving time between a head cell and the last cell;
- and
- releasing means for determining that a cell loss is detected when the receiving time exceeds a set time and releasing said buffer memory.
A communication equipment comprising:
- segmenting/reassembling means for segmenting a cell received and reassembling it into frame data;
- storing means for temporarily storing the reassembled frame data;
- discriminating means for discriminating whether the received cell is an intermediate cell or a last cell;
- monitoring means for monitoring a receiving time between a cell and a cell or a receiving time between a head cell and the last cell;
- and
- releasing means for determining that cell loss is detected when the receiving time exceeds a set time and releasing said buffer memory.
Dependencies are inferred from the claim text.