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Title : SIP Controlled Admission and Preemption
Author(s) : J. Babiarz, et al.
Filename : draft-babiarz-pcn-sip-cap-00.txt
Pages : 20
Date : 2006-10-16
This framework defines a method of providing Explicit Congestion
Control to real-time inelastic traffic like voice and video through
the use of session admission control and preemption mechanisms. This
approach uses the Pre-Congestion Notification Marking (PCN) [1]
mechanism. PCN marking is deployed in routers to measure and convey
two levels of onset of congestion with the SIP controlled endpoints
responding to the marking. This approach is different from what is
defined in An edge-to-edge Deployment Model for Pre-Congestion
Notification [3], as here the admission and preemption control
function resides in the application (either in the endpoint or the
application server that controls the endpoint. This framework is
focused on using Session Initiated Protocol (SIP) as the application
signaling protocol but other application signaling protocols could be
extended for this purpose.
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