摘要 |
The invention concerns a method for a multi-port node having a shared buffer memory to provide enhanced data packet buffering capacity for established virtua l circuits (VC's) through the node and one of its output ports while maintaining grades of service commitments. The method admits incoming data packets to a node for an established VC based on a determination of combination of factors including the effective memory requirements for each output port as VC's are created or terminated, the portions of buffer memory in use for conveying packet s through the intended output port for the incoming packet, and the total amount o f available shared memory in the node. Such determinations enable the node to better decide whether admitting the incoming packet would cause a disproportionate allocation of the shared memory for the intended output port. A s a consequence, a relatively high packet buffering capacity can be achieved substantially without violating grades of service commitments.
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