ATM switching system and cell control method

An ATM cell control method of an ATM communication apparatus including a plurality of input lines and a plurality of output lines, said ATM communication apparatus transfers burst data, including a plurality of ATM cells, received from one of the input lines to one of the output lines in response to header information of each of the ATM cells, said ATM control method comprising the steps of:

• detecting a boundary of a current burst data by header information of one of the ATM cells of the current burst data;
• deciding one of discard and pass of a next incoming burst data following the detected boundary based on an amount of other burst data to be passed;
• and
• controlling a plurality of ATM cells included in the next burst data based on the decision in the deciding step.

An ATM cell control method of an ATM communication apparatus including a plurality of input lines and a plurality of output lines, said ATM communication apparatus transfers burst data, including a plurality of ATM cells, received from one of the input lines to one of the output lines in response to header information of each of the ATM cells, said ATM control method comprising the steps of:

• detecting a boundary of a current burst data by header information of one of the ATM cells of the current burst data;
• deciding one of discard and pass of a next incoming burst data following the detected boundary when the next incoming burst data competes with other burst data to be passed;
• and
• controlling a plurality of ATM cells included in the next incoming burst data based on the decision in the deciding step.

An ATM cell control method of an ATM communication apparatus, said ATM cell control method comprising the steps of:

• receiving a plurality of ATM cells included in burst data from one of a plurality of input lines;
• detecting a boundary of the burst data by header information of one of the ATM cells of the burst data;
• deciding one of discard and pass of a next incoming burst data following the detected boundary when the next incoming burst data competes with a group of other ATM cells to be passed;
• discarding the leading ATM cell of the next incoming burst data and ATM cells included in the next incoming burst data arriving after the leading ATM cell or passing all ATM cells of the next incoming burst data to one of a plurality of output lines based on the decision in the deciding step;
• and
• transmitting the next incoming burst data decided to be passed from the one output line.

An ATM cell control method of an ATM communication apparatus, comprising the steps of:

• receiving a plurality of ATM cells included in burst data from one of a plurality of input lines;
• detecting a boundary of the burst data by header information of one of the ATM cells of the burst data;
• deciding one of discard and pass of a next incoming burst data following the detected boundary based on an amount of other burst data to be passed;
• discarding the leading ATM cell of the next incoming burst data and ATM cells included in the next incoming burst data arriving after the leading ATM cell or passing all ATM cells of the next incoming burst data to one of a plurality of output lines based on the decision in the deciding step;
• and
• transmitting the next incoming burst data decided to be passed from the one output line.

An ATM cell control method of an ATM communication apparatus, comprising the steps of:

• receiving a plurality of ATM cells included in burst data from one of a plurality of input lines;
• detecting a boundary of the burst data by header information of one of the ATM cells of the burst data;
• deciding one of discard and pass of a next incoming burst data and ATM cells included in the next incoming burst data arriving after the leading ATM cell or passing all ATM cells of the next incoming burst data to one of a plurality of output lines based on the decision in the deciding step;
• and
• transmitting the next incoming burst data decided to be passed from the one output line.

An ATM communication apparatus which handles ATM cells including a plurality of ATM cells belonging to burst data, said ATM communication apparatus comprising:

• a plurality of input lines;
• a plurality of output lines;
• and
• a switch coupled to said input lines and said output lines, said switch transfers ATM cells of burst data received from said input lines to one of said output lines based on header information of each of said ATM cells or discard a series of ATM cells of the burst data, said series of ATM cells beginning from a first ATM cell of the burst data, when the burst data competes with a plurality of other ATM cells to be passed.

An ATM communication apparatus which handles ATM cells including a plurality of ATM cells belonging to burst data, said ATM communication apparatus comprising:

• a plurality of input lines;
• a plurality of output lines;
• and
• a switch coupled to said input lines and said output lines, said switch transfers ATM cells of burst data received from said input lines to one of said output lines based on header information of each of said ATM cells or discard a series of ATM cells of the burst data, said series of ATM cells beginning from a first ATM cell of the burst data, when the burst data competes with other burst data to be passed.