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SIP Controlled Flow Admission and Preemption Interior Nodes provide via packet marking network resource utilization information based on their local measurement. End/Edge Nodes pass the marking information from Interior Nodes to SIP functional elements for making Session Admission and Preemption decisions. draft-babiarz-pcn-sip-cap-00.txt PCN PCN-enabled Routers PCN-enabled End Point PCN-enabled Gateway CS SIP Call Server |