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Method of Bandwidth Management by Dynamic Port Configuration

IP.com Disclosure Number: IPCOM000122446D
Original Publication Date: 1991-Dec-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 5 page(s) / 134K

Publishing Venue

IBM

Related People

Doss, S: AUTHOR [+5]

Abstract

In many computer configurations that support switched data communications links, the switched protocols (e.g., International Telegraph and Telephone Consultative Committee-CCITT for X and V series recommendations) are implemented within a communications subsystem. To utilize this communications support, the host application system instructs the subsystem to perform communication-related functions (e.g., connection setup, takedown, etc.). This article describes a mechanism that allows a host application program to configure a port for a particular type of switched connection and then dynamically reconfigure it for another type of switched connection without disrupting active or on- going connections.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Method of Bandwidth Management by Dynamic Port Configuration

      In many computer configurations that support switched
data communications links, the switched protocols (e.g.,
International Telegraph and Telephone Consultative Committee-CCITT
for X and V series recommendations) are implemented within a
communications subsystem.  To utilize this communications support,
the host application system instructs the subsystem to perform
communication-related functions (e.g., connection setup, takedown,
etc.).  This article describes a mechanism that allows a host
application program to configure a port for a particular type of
switched connection and then dynamically reconfigure it for another
type of switched connection without disrupting active or on- going
connections.

      This invention creates the concept of a Port Connection Manager
(PCM) which manages physical ports and controls switched connections
through those ports (Fig. 1).  The PCM is responsible for performing
the following functions in accordance with a particular protocol
specification:
.   configure ports in advance of the switched connection
.   initiate switched connections
.   clear or take down switched connections
.   reconfigure a port for a different type of switched connection
Primitives

      Port or switched connection management by the host is
accomplished by exchanging implementation independent messages or
primitives between the host application and the PCM.
Note:  These primitives are separate and independent of a particular
transport mechanism used to exchange the primitives between the host
application and the PCM.

      A host application can manage bandwidth by reconfiguring
switched connection ports, in a manner that is non-disruptive to
ongoing calls, as bandwidth is needed. The flow diagram in Fig. 2
describes how a port can be reconfigured (connection type changed).
The flow diagram in Fig. 3 depicts how this invention accommodates
active connections during reconfiguration.

      In Fig. 4:
1    The host application issues a primitive to the PCM, instructing
it to configure a port for an incoming ca...