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Background
draft-ietf-sipping-overload-reqs defined overload problem and proposed simulation model to study
Draft-hilt-sipping-overload proposed some mechanisms
Lots of open questions
What is a suitable overload control method?
What type of feedback is required?
How to achieve fairness?
What is the format of the feedback?
What granularity is required?
Became clear a coordinated design team was needed
PPT Version