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CRN discovery (cont’d) Route Change vs. Mobility (I) Approaches Coupled approach Separated approach At the NSLP level, CRN is determined by comparing the Source Identification Information (SII) contained in the incoming signaling message to that of previously stored in the node. At the NTLP level, CRN discovery can be considered as an extension to the peer discovery (e.g., using GIMPS query-response) Mobility may cause the change of the flow identifier. the flow identifier should be updated along the entire chain of NSIS entities A For each flow, a CRN is only discovered Upstream CRN (UCRN) / Downstream CRN (DCRN) |