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Link Layer Events Notifications for Detecting Network Attachments draft-ietf-dna-link-information-00.txt Alper Yegin, Eric Njedjou, Nicolas Montavont, Thomas Noel, Siva Veerepalli Scope of the document • Certain access technologies are capable of providing various link-layer status information to IP • These Link-layer notifications can help IP expeditiously detect configuration changes • Link-layer events should deliver additional information as identity of the attachment point or IP configuration parameters – These parameters will determine wether action to be taken by IP is required as a consequence of the reception of the link events • Two link-layer events are potentially useful for the DNA process; – Link Up – Link Down Status update • Technologies for which link layer events for DNA have been identified – GPRS/UMTS Specification Release 4 (3GPP) – CDMA2000 (3GPP2) – IEEE Std 802.11-1999 / IEEE Draft 802.11i -2004 • Technologies to be added – IEEE 802.16? – IEEE 802.3? – Text for IEEE 802.11 Ad-hoc mode available soon GPRS/UMTS link events classification update • GPRS/UMTS – Two Types of link events, depending on usage scenarios • PPP type – Mobile node running IP is not on same equipment as the GPRS/UMTS protocol/stack: PPP interface used – Trigger for Link Up event: » Network Control Protocol phase reached and IPCP reached Opened state – Trigger for Link Down event: » IPCP termination (Close state reached) GPRS/UMTS link events classification update • GPRS/UMTS – Two Types of link events • GPRS link type – Mobile node running IP is on the same equipment as the GPRS/UMTS protocol/stack – Trigger for Link Up event: » Successful activation of PDP context (ACTIVATE PDP ACCEPT received at MS) – Trigger for Link Down event: » Successful deactivation of PDP context (DEACTIVATE PDP REQUEST sent/received from/at MS) GPRS/UMTS usage scenarios Application R Layer 3 1 Network Interface PPP PPP RS232, IR, Bluetooth RS232, IR, Bluetooth TE (laptop PC, PDA..) GMM/SM LLC/PDCP LLC/RRC RLC MAC GSM RF/L1 Mobile Station application IP 2 SNDCP/PDCP SNDCP/PDCP GMM/SM LLC/PDCP LLC/RRC RLC MAC GSM RF/L1 Mobile Station GPRS/UMTSlink events classification update • Are there 3GPP Mobility Management specialists to comment on this? • Are there implementors of IP layer on GPRS/UMTS/ stations to give their experience of providing IP with link events? • Are there two such scenarios for 3GPP2? • Any other Feedback from the group?