Importance

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Abstract

In a credit control method and system, an initial credit value is sent from a receiving-side to a sending-side prior to transferring a packet. Transfer of a packet is started on the sending-side when this credit value is received. On the receiving-side, a new credit value is calculated when the packet is received, and the same number of packets as the number indicated by the calculated new credit value are received and processed. A new credit value is sent to the sending-side whenever receiving buffers whose number equals the preceding new credit value are emptied. On the sending-side, the sum of the new credit value and the initial credit value, whenever the new credit value is received, is stored as a credit value indicating the number of successively transmittable packets. The stored credit value is decremented by one on the sending-side whenever a packet is sent, and packets are continuously transferred until the credit value becomes '0' or there is no more packet to be sent. An integral new credit value Cn calculated based on a condition: Ta+Tp.times.(Cn-1)

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First Claim