Enhanced interface for an asynchronous transfer mode segmentatio

Details Enhanced interface for an asynchronous transfer mode segmentatio Enhanced interface for an asynchronous transfer mode segmentatio

1997-10-31

2000-04-18

Olms, Douglas W.

Multiplex communications

Communication techniques for information carried in plural...

Assembly or disassembly of messages having address headers

370471, 710 22, H04L 1200

Patent

active

060523875

ABSTRACT:
An enhanced interface between a processor and an Asynchronous Transfer Mode (ATM) segmentation controller. A software driver communicates with the controller to efficiently segment protocol data units (PDUs) into ATM cells for transmission. The software driver creates a series of data structures in memory for managing the PDU, wherein the data structures include a linked list of buffer descriptors that describe the size and location of subportions of the PDU. The ATM controller is capable of accessing and interpreting these data structures. As a result, only a single I/O operation is required for the software driver to initiate direct memory access (DMA) operations by the ATM controller to retrieve the data structures from memory and subsequently transmit the PDU.

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patent: 5689509 (1997-11-01), Gaytan et al.
patent: 5875292 (1999-02-01), Taketsugu

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