Buffer management for support of quality-of-service...

Details Buffer management for support of quality-of-service... Buffer management for support of quality-of-service...

2006-02-14

2006-02-14

Ngo, Ricky (Department: 2663)

Multiplex communications

Data flow congestion prevention or control

Control of data admission to the network

C370S412000, C370S428000

Reexamination Certificate

active

06999416

ABSTRACT:
A method of utilizing shared memory resources in switching Protocol Data Units (PDUs) at a data switching node is presented. The method includes reserving: a temporary memory storage portion for storing PDUs prior to queuing for processing thereof, a Class-of-Service memory storage portion to provide support Quality-of-Service guarantees, a shared memory-pool portion and an input port memory storage portion enabling non-blocking input port flow control. Provisions are made for PDU discard decisions to be delayed until after PDU headers are inspected subsequent to the receipt of each PDU. Provisions are made for well-behaved data flows conveyed via an input port to be protected against blocking from misbehaving data flows conveyed via other input ports of the data switching node. The advantages are derived from a memory management scheme which can be equally applied in a PDU discard and a flow control environment to reduce PDU discard instances at a data network node implementing the memory management scheme while reducing memory storage requirements.

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Bertsekas et al., Data Networks, 1992, pp. 496-499, 2nd Ed., Prentice Hall, Upper Saddle River, NJ.
IEEE Std 802.3, pp. 1205-1215, 1998 Edition.

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