1. Filters for Mobile IP Bindings (NOMAD) draft-nomad-mobileip-filters-05 N. A. Fikouras, A. Udugama, K. Kuladinithi and C. Görg University of Bremen, Germany W. Zirwas ICM, Siemens AG, Munich presented by Carsten Bormann University of Bremen, Germany

2.  Better utilization of available network resources!
Motivation
“Simultaneous use of multiple points of attachment on a single Mobile Device”
Mobile IPv4 : - Simultaneous bindings (S bit), duplicates traffic
- If duplication is unwanted, only one PoA can be active at any given time
- One hand-off affects all flows
- Not enough IP addresses for multi-homing
Filters for Mobile IP Bindings (NOMAD):
- Simultaneous use of multiple PoAs with a single Home IP address
without duplicating traffic
- Distribution of Multiple Flows
- Distribution of a Single Flow
- Flow Rejection
Applications: - Load balancing
- Network management (flow management initiated by core network)
- Enhanced terminal mobility (partial hand-offs, smoothed hand-offs)
 Better utilization of available network resources!

3. Mode of Operation Multiple Flow Distribution Single Flow Distribution
Reg.
Reg.
Reg.
Filter FC
Filter
Proto=udp &
Proto=udp &
Port=5000
Weight=20
Port=5000
Weight=80
Index=1
Weight=0
Index=1
Index=1
Multiple Flow Distribution
Single Flow Distribution
Flow Rejection

4. Filtering Request

5. Dynamic Format Filters
Nine Types of Filter Modules
DSCP / Flow Label , Traffic Class
Source Address, Source Network
Source/Destination Port Number/Number Range
Protocol Number
Free form, specifies the value of an area anywhere
within the packet
OR between Filter Module Predicates
(src port == 500 || src port == 600)
AND between Filter Modules
(proto == udp && src port == 500)
Only one Filter may be applicable

6. Conclusions Simultaneous use of multiple PoA
with a single Home IP address
Dynamic Filter Format definition
Distribution of Multiple Flows (different criteria)
Distribution of a Single Flow (shared criteria)
Flow Rejection