1. Nemo RO taxonomy P. Thubert, M. Molteni (Cisco) C. Ng (Panasonic) H. Ohnishi (NTT) E. Paik (Seoul Nat. Univ.) 59th IETF, NEMO WG

2. Outline Types of route optimization Nested Nemo RO and Local Mobility Managt RO & Multihoming Shades of transparency AR selection

3. Types of route optimizations MR-to-CN MIPv6 Route Optimization over NEMO Nested Mobile Network MR CN LFN HA MR CN MR’s HA MN MN’s HA MR2 CN MR2’s HAMR1’s HA MR1 LFN

4. Model: Nested Nemo attached to an AR AR (or root-MR) owns all the CareOfs of the MNs (from the infrastructure standpoint) AR (or root-MR) handles the local mobility to the MNs (using ad-hoc or MIP) HMIP and DHCP-PD based approaches Need more on MANET / Micromobility LMM RO and LMM MR2 CN MR2’s HAMR1’s HA MR1 LFN

5. Model: Multiple HAs (1, N, *) or Jet Set maybe multiple HoAs as well? Problem: select best HA to shorten MR/HA/CR Other problem? RO and Multihoming MR CN HA LFN HA

6. Model: Nested Nemo attached to an AR, where MRs act as MAR for others MRs to attach to If loops are avoided, MRs form a tree Problem: How to select MAR? Avoiding loops Optimizing metrics such as hops and bandwidth Need a Tree Discovery mechanism Quick Minimal overhead on top of ND AR selection MR AR How to select?

7. [cwng's interpretation of Mobility Transparency in RO] –[ … ] achieving mobility transparency may not be practical. –For instance, to achieve nested tunnel optimizations, the mobility of the top-level MR is often exposed to other entities, such as the HA of a nested MR. In the case of MR performing BU for MNNs, it might be necessary to pass mobility information of the MR to CN (and even MNN) in order not to break the end-to-end principle. For the scenario of optimization using infrastructure, the mobility information might be necessarily exposed to correspondent routers or MAP. –Thus, one should bear in mind when designing RO solution that a sacrifice might be necessary when weighing conflicting factors such as mobility transparency, optimization level, and end-to-end integrity. [Hosik's interpretation of Mobility Transparency in RO] –In the case of extended support of NEMO such as nested NEMO, mobility transparency is desirable but that is not mandatory for the efficiency of the route optimization. For example, the notebook and PDA inside a vehicle can access to the Internet through the mobile router of the vehicle. In that case, if the movement of the vehicle affects to the notebook or the PDA, they can perform individual binding update operation to the correspondent node or its home agent but that can cause location privacy problem. [Onishi's interpretation of Mobility Transparency in RO] –In RO solutions, MR can optimize the route between its own HA and MR. It is desirable that communication can not be interrupted by this route optimization. ???? Shades of Transparency

8. Chapter 6: needs more elaboration must be simpler to grasp Should this become a WG item? Mailing List issues