(*)<..........>(*)
     (2001:db8:1:1::/64) |              |
+------------------------------+  +------------------------------+
|                        v     |  |     v                        |
| +-------+          +-------+ |  | +-------+          +-------+ |
| | Host1 |          |IP-OBU1| |  | |IP-OBU2|          | Host3 | |
| +-------+          +-------+ |  | +-------+          +-------+ |
|     ^                  ^     |  |     ^                  ^     |
|     |                  |     |  |     |                  |     |
|     v                  v     |  |     v                  v     |
| ---------------------------- |  | ---------------------------- |
| 2001:db8:10:1::/64 ^         |  |         ^ 2001:db8:30:1::/64 |
|                    |         |  |         |                    |
|                    v         |  |         v                    |
| +-------+      +-------+     |  |     +-------+      +-------+ |
| | Host2 |      |Router1|     |  |     |Router2|      | Host4 | |
| +-------+      +-------+     |  |     +-------+      +-------+ |
|     ^              ^         |  |         ^              ^     |
|     |              |         |  |         |              |     |
|     v              v         |  |         v              v     |
| ---------------------------- |  | ---------------------------- |
|      2001:db8:10:2::/64      |  |       2001:db8:30:2::/64     |
+------------------------------+  +------------------------------+
   Vehicle1 (Mobile Network1)        Vehicle2 (Mobile Network2)

   <----> Wired Link   <....> Wireless Link   (*) Antenna