Transcript Link Layer Events Notifications for Detecting Network

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?