Building of a laboratory testbed for technology demonstration
We have built a mini laboratory Myrinet
testbed at the Ohio State University for development of the proposed
software layers and for technology demonstration. |
We have developed a QoS routing framework
and its associated admission control, member join/leave procedures, and
state refresh and update procedures, to allow deployment of QoS routing
capabilities in scalable core-based multicast routing protocols, with the
minimum possible impact to the existing infrastructure. Click
here to refer to the IETF I-D entitled "QoS Extension
to CBT." |
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We have devised a generic rate-based
scheduling paradigm that can serve as a vehicle either for implementing
existing well-known rate-based message scheduling algorithms, or for designing
new rate-based message scheduling algorithms. The proposed scheduling paradigm
is general enough to encompass a wide spectrum of rate-based scheduling
algorithms and is flexible enough to allow realization of several desirable
features, e.g., rate enforcement, capability of handling overbooking, and
capability of providing rate parameters for traffic monitoring. |
We have laid out the software
architecture and implemented in Java a modularized network simulation
tool, NetSimQ. The software release, along with its user's
manual and developer's manual, is scheduled in September 1998. |
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We have started to implement the proposed
protocol stack in MK 7.3 using the CORDS subsystem (which is itself an
extension of x-kernel with the notion of path introduced). We are also
using the GateD Multicast source codes
(distributed by the GateD Consortium, Merit Network, Inc.) to prototype
the proposed QoS-driven core-based tree multicast routing protocol both
as a stand alone mechanism and as part of a reservation protocol (RSVP)
in NetBSD and will empirically measure its performance. |
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