System Support for Bandwidth Management and Content Adaptation
in Internet Applications
David Andersen, Deepak Bansal, Dorothy Curtis, Srinivasan
Seshan1, Hari Balakrishnan
M.I.T. Laboratory for
Computer Science
Cambridge, MA 02139
{dga, bansal, dcurtis,
srini, hari}@lcs.mit.edu
Proc. USENIX OSDI Conf., San Diego, CA, October 2000.
Abstract
This paper describes the implementation and evaluation of an operating
system module, the Congestion Manager (CM), which provides integrated
network flow management and exports a convenient programming interface
that allows applications to be notified of, and adapt to, changing
network conditions. We describe the API by which applications
interface with the CM, and the architectural considerations that
factored into the design. To evaluate the architecture and API, we
describe our implementations of TCP; a streaming layered audio/video
application; and an interactive audio application using the CM, and
show that they achieve adaptive behavior without incurring much
end-system overhead. All flows including TCP benefit from the sharing
of congestion information, and applications are able to incorporate
new functionality such as congestion control and adaptive behavior.
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