公开(公告)号：CA2153446A1

公开(公告)日：1996-03-20

申请号：CA2153446

申请日：1995-07-07

Applicant: IBM

Inventor： DUAULT MAURICE ,  GALAND CLAUDE

IPC: H04Q3/00 ,  H04L12/56 ,  H04Q11/04

Abstract: The invention relates to a method for dynamically changing the bit rate or bandwidth of constant bit rate data structures in an Asynchronous Transfer Mode (ATM) communications environment. The method is caracterized in that it includes the steps of: a) defining within said data channel a Change Indicator (CI) indicative of an end user's request for a bit rate change within said data structures; b) continuously transmitting said Change Indicator from the source side to the destination side, along with the data structures on said data channel; c) upon receipt at said destination side of a user's request of a bit rate change, modifying the value of said Change Indicator; d) at said source side, acknowledging the modification of the value of said Change Indicator, whereby the transmission of data structures continues on the data channel with a new constant bit rate .

公开(公告)号：DE69325203T2

公开(公告)日：2000-01-20

申请号：DE69325203

申请日：1993-03-09

Applicant: IBM

Inventor： DUAULT MAURICE ,  LYNCH JEFFREY JAMES ,  SNYDER RAMON EUGENE

IPC: H04J3/17 ,  H04L29/10 ,  H04Q11/04 ,  H04Q3/66 ,  H04M11/06 ,  H04Q3/00 ,  H04L29/00

Abstract: A method and an apparatus allows multiple users to share one or more data communication lines without requiring the users to actively participate in the arbitration. The preferred embodiment comprises an ISDN Port Connection Manager (PCM) for managing the use of each of the individual channels of one or more line ports having ISDN service thereon. The ISDN PCM manages the use of the channels between applications using such distinct access methods as IBM's Virtual Telecommunications Access Method (VTAM), TCP/IP, and Open Systems Interconnect (OSI) access methods. The ISDN PCM determines that an application needs access to an ISDN channel, determines the availability of the ISDN network and sets up the communication between the application and the network if the channel is available. If no channel is available at that time, the ISDN PCM indicates to the application when the channel becomes available so that the application may determine whether it still needs access.

公开(公告)号：CA2093452A1

公开(公告)日：1993-10-11

申请号：CA2093452

申请日：1993-04-06

Applicant: IBM

Inventor： DUAULT MAURICE ,  LYNCH JEFFREY J ,  SNYDER RAMON E

IPC: H04J3/17 ,  H04L29/10 ,  H04Q11/04 ,  H04L5/14

Abstract: A method and an apparatus allows multiple users to share one or more data communication lines without requiring the users to actively participate in the arbitration. The preferred embodiment comprises an ISDN Port Connection Manager (PCM) for managing the use of each of the individual channels of one or more line ports having ISDN service thereon. The ISDN PCM manages the use of the channels between applications using such distinct access methods as IBM's Virtual Telecommunications Access Method (VTAM), TCP/IP, and Open Systems Interconnect (OSI) access methods. The ISDN PCM determines that an application needs access to an ISDN channel, determines the availability of the ISDN network and sets up the communication between the application and the network if the channel is available. If no channel is available at that time, the ISDN PCM indicates to the application when the channel becomes available so that the application may determine whether it still needs access.

公开(公告)号：DE69330791T2

公开(公告)日：2002-05-02

申请号：DE69330791

申请日：1993-10-14

Applicant: IBM

Inventor： DUAULT MAURICE

IPC: H04L12/54 ,  H04L12/70 ,  H04L29/06 ,  H04Q11/04 ,  H04L12/56

Abstract: A method and an apparatus for transferring structured data of a constant bit rate traffic in an ATM network. The method uses the recurrence of alignment of the structured data field of length N in a 47 octet SA_PDU payload. At the transmitting end the CSI bit of the header of the first SAR_PDU is set to 1. It is then set to 0 for the next SAR_PDUs until the Nth SAR_PDU is reached. It is then again set to 1. This process is repeated until the last SAR_PDU has been emitted.

公开(公告)号：DE69330791D1

公开(公告)日：2001-10-25

申请号：DE69330791

申请日：1993-10-14

Applicant: IBM

Inventor： DUAULT MAURICE

IPC: H04L12/54 ,  H04L12/70 ,  H04L29/06 ,  H04Q11/04 ,  H04L12/56

Abstract: A method and an apparatus for transferring structured data of a constant bit rate traffic in an ATM network. The method uses the recurrence of alignment of the structured data field of length N in a 47 octet SA_PDU payload. At the transmitting end the CSI bit of the header of the first SAR_PDU is set to 1. It is then set to 0 for the next SAR_PDUs until the Nth SAR_PDU is reached. It is then again set to 1. This process is repeated until the last SAR_PDU has been emitted.

公开(公告)号：DE69325203D1

公开(公告)日：1999-07-15

申请号：DE69325203

申请日：1993-03-09

Applicant: IBM

Inventor： DUAULT MAURICE ,  LYNCH JEFFREY JAMES ,  SNYDER RAMON EUGENE

IPC: H04J3/17 ,  H04L29/10 ,  H04Q11/04 ,  H04Q3/66 ,  H04M11/06 ,  H04Q3/00 ,  H04L29/00

Abstract: A method and an apparatus allows multiple users to share one or more data communication lines without requiring the users to actively participate in the arbitration. The preferred embodiment comprises an ISDN Port Connection Manager (PCM) for managing the use of each of the individual channels of one or more line ports having ISDN service thereon. The ISDN PCM manages the use of the channels between applications using such distinct access methods as IBM's Virtual Telecommunications Access Method (VTAM), TCP/IP, and Open Systems Interconnect (OSI) access methods. The ISDN PCM determines that an application needs access to an ISDN channel, determines the availability of the ISDN network and sets up the communication between the application and the network if the channel is available. If no channel is available at that time, the ISDN PCM indicates to the application when the channel becomes available so that the application may determine whether it still needs access.

公开(公告)号：CA2093452C

公开(公告)日：1998-04-28

申请号：CA2093452

申请日：1993-04-06

Applicant: IBM

Inventor： SNYDER RAMON E ,  DUAULT MAURICE ,  LYNCH JEFFREY J

IPC: H04J3/17 ,  H04L29/10 ,  H04Q11/04 ,  H04L5/14

Abstract: A method and an apparatus allows multiple users to share one or more data communication lines without requiring the users to actively participate in the arbitration. The preferred embodiment comprises an ISDN Port Connection Manager (PCM) for managing the use of each of the individual channels of one or more line ports having ISDN service thereon. The ISDN PCM manages the use of the channels between applications using such distinct access methods as the IBM Virtual Telecommunications Access Method (VTAM), TCP/IP, and Open Systems Interconnect (OSI) access methods. The ISDN PCM determines that an application needs access to an ISDN channel, determines the availability of the ISDN network and sets up the communication between the application and the network if the channel is available. If no channel is available at that time, the ISDN PCM indicates to the application when the channel becomes available so that the application may determine whether it still needs access.