公开(公告)号：AU2002225237A1

公开(公告)日：2002-11-05

申请号：AU2002225237

申请日：2002-01-28

Applicant: IBM

Inventor： VERPLANKEN FABRICE JEAN ,  HEDDES MARCO ,  BASSO CLAUDE ,  LOGAN JOSEPH FRANKLIN ,  CALVIGNAC JEAN LOUIS

IPC: H04L12/18 ,  H04L12/56

Abstract: Data structures, a method, and an associated transmission system for multicast transmission on network processors in order both to minimize multicast transmission memory requirements and to account for port performance discrepancies. Frame data for multicast transmission on a network processor is read into buffers to which are associated various control structures and a reference frame. The reference frame and the associated control structures permit multicast targets to be serviced without creating multiple copies of the frame. Furthermore this same reference frame and control structures allow buffers allocated for each multicast target to be returned to the free buffer queue without waiting until all multicast transmissions are complete.

公开(公告)号：CA2400727A1

公开(公告)日：2001-10-18

申请号：CA2400727

申请日：2001-04-10

Applicant: IBM

Inventor： ROVER SONIA KIANG ,  RAO SRIDHAR ,  HARIHARAN SEETA ,  GALLO ANTHONY MATTEO ,  HEDDES MARCO ,  BASSO CLAUDE

IPC: G06F13/10 ,  H04L12/24 ,  H04L12/56 ,  H04L29/06

Abstract: A system and method for controlling overall behavior of a network processor device implemented in a network processing environment servicing a communications network. The method includes steps of receiving a guided control frame including one or more control functions for configuring variou s functional devices within the network processor with device control paramete r data; a step of forwarding one or more control functions from a received control frame to a functional device within the network processor to be configured; and, executing the control functions as specified in the control frame. A novel control frame data structure and communications infrastructur e is implemented whereby any network processor device operating in a distribut ed network processing environment may be controlled in accordance with executed control functions and device control parameter data.

公开(公告)号：DE69226766D1

公开(公告)日：1998-10-01

申请号：DE69226766

申请日：1992-06-22

Applicant: IBM

Inventor： BASSO CLAUDE ,  VERPLANKEN FABRICE ,  CALVIGNAC JEAN

IPC: G06F13/00 ,  H04L7/00 ,  H04L12/433 ,  H04L12/64 ,  H04L12/42

Abstract: A hub featuring several ports for attachment of stations to a LAN comprises concentration logic (14) for the handling of multiplexed incoming and outgoing Token-Ring and isochronous flows from and to the stations. The concentration logic comprises a clock recovery logic (42) from incoming Token-Ring packet data stream (40), for regeneration of Differential Manchester encoded data on output (400), and recovering of Token-Ring clock (401). A cycle framing generator (43) receives a 125 us synchronization clock (local or remote) from the hub backplane (402), and the Token-Ring clock (401), and generates control signals (403) to each of the 10 ports. Each port is made up of a port transmit interface (44), and a port receive interface (45). Data from a station hooked to the hub is input (404) to port receive interface (45). Token-Ring packet Differential Manchester encoded data are output (406) on to the next active port, and specifically to its port transmit interface, along with a recovered strobe clock (405), while ISO data are output (407) to a switch (46). The switch receives a hub local clock (412), which otherwise distributes on the whole concentration logic. isochronous traffic interchange with the hub backplane is ensured thru leads 410 and 411; inbetween ports or between ports and the hub is ensured thru leads 407 and 409 replicated for each port. Data to the station hooked to the hub is output (408) from port transmit interface (44). Differential Manchester encoded data are received (400) along with Token-Ring clock (401). Control signals are input (403). Isochronous data are received (409). Token-Ring packet Differential Manchester encoded data are finally output from the concentration logic (41).

公开(公告)号：DE3853162D1

公开(公告)日：1995-03-30

申请号：DE3853162

申请日：1988-12-23

Applicant: IBM

Inventor： BASSO CLAUDE ,  PAUPORTE ANDRE ,  LEBIZAY GERALD ,  POIRAUD CLEMENT ,  MUNIER JEAN-MARIE

IPC: G06F15/16 ,  G06F9/46 ,  G06F12/06 ,  G06F13/16 ,  G06F15/167 ,  G06F15/177