1. 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

2. 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

3. 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

4. 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)

5. 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)

6. GPRS/UMTS usage scenarios Layer 3 PPP RS232, IR, Bluetooth Application PPP RS232, IR, Bluetooth SNDCP/PDCP LLC/PDCP RLC MAC GSM RF/L1 TE (laptop PC, PDA..) Mobile Station R Network Interface GMM/SM LLC/RRC application IP SNDCP/PDCP LLC/PDCP RLC MAC GSM RF/L1 GMM/SM LLC/RRC Mobile Station 1 2

7. 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? GPRS/UMTSlink events classification update