Multiplex communications – Data flow congestion prevention or control
Patent
1996-02-29
1997-09-30
Olms, Douglas W.
Multiplex communications
Data flow congestion prevention or control
370431, 370468, H04J 308, H04J 316
Patent
active
056732538
ABSTRACT:
A network node and a method of dynamically allocating bandwidth for intranodal and internodal telecommunications sessions include monitoring resource utilization at both a line shelf level and a system-wide level. In one embodiment, the dynamic allocation of bandwidth is applied to multimedia conferencing between subscribers of the same private branch exchange (PBX). If resource utilization at one or both of the line shelves that are involved in the intranodal session reaches or exceeds a preselected maximum threshold, bandwidth reallocation is triggered. In like manner, if a switching fabric of the PBX has reached a resource utilization maximum threshold that threatens system-wide blocking of any additional sessions, resources are reallocated for the system in order to free bandwidth. Utilization thresholds preferably adaptively vary on an hour-to-hour basis and/or a day-to-day basis. In the preferred embodiment, a hierarchy of classes of service determines which sessions will be subjected to bandwidth reduction.
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Olms Douglas W.
Phillips Matthew C.
Siemens Business Communication Systems
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