Link%20Layer%20Events%20Notifications%20for%20Detecting%20Network%20Attachments

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
R
Application
Layer 3
1
SNDCP/PDCP
GMM/SM
Network Interface
LLC/PDCP
LLC/RRC
PPP
PPP
RLC
MAC
RS232, IR, Bluetooth
RS232, IR, Bluetooth
GSM RF/L1
TE (laptop PC, PDA..)
Mobile Station
GMM/SM
2
LLC/RRC
Mobile Station
7
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?