Congestion control method for packet switching apparatus
First Claim
1. In a packet switching apparatus interconnected by associated communication lines to one or more other packet switching apparatuses, wherein data packets are output from various types of terminals and are temporarily held in a queue for exchange between the packet switching appartuses, a congestion control method comprising the steps of:
- attaching a plurality of types of priority data indicating different priorities for different demands to each of the data packets; and
controlling the queue when a new data packet is input to the queue to satisfy major demands for the data packets concurrently according to said plurality of types of attached priority data of said new data packet and of all the data packets held in the queue.
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Abstract
One technique of a congestion control method for packet switching apparatuses, in which a plurality of priority data indicative of different demands, such as a first priority data indicative of immediateness priority and a second priority data indicative of necessity priority, are attached to each packet. In congestion of a packet queue, such control is carried out that such a packet as having the high first immediateness priority is rearranged as located in the front part of the queue while such a packet as having the high first immediateness priority but having the low second necessity priority is first discarded according to the first and second priority data of the packets, whereby major demands for the each packet are concurrently satisfied. For example, a packet of data transferred between telephone set terminals has a strong immediateness demand but has a relatively weak necessity demand, whereas, a packet of data transferred between data terminals has a relatively weak immediateness demand but has a strong necessity demand.
100 Citations
6 Claims
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1. In a packet switching apparatus interconnected by associated communication lines to one or more other packet switching apparatuses, wherein data packets are output from various types of terminals and are temporarily held in a queue for exchange between the packet switching appartuses, a congestion control method comprising the steps of:
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attaching a plurality of types of priority data indicating different priorities for different demands to each of the data packets; and controlling the queue when a new data packet is input to the queue to satisfy major demands for the data packets concurrently according to said plurality of types of attached priority data of said new data packet and of all the data packets held in the queue. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification