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Standardization Issues Develop standards track solutions to the following problems: 1. When should an interior router mark a packet (i.e. at what traffic level) in order to give early warning of its own congestion? 2. How should such a mark be encoded in a packet (in the ECN and/or DSCP fields)? 3. How should these markings (at packet granularity) be converted into admission control and flow pre-emption decisions (at flow granularity)? Flow admission / pre-emption decision at edges Packets Marked at router interfaces PCN PCN-enabled Gateway PCN-enabled Routers PCN-enabled Gateway |