Solution Visited Network | Home Network | | | +-------+ | | AAA | +-------+ | +-------+ +--------| HA1 | | | | +-------+ | | | | | | +------+ Init | --> +-------+ | +-------+ | MN |<--------|-------->| BCF |---+--------| HA2 | +------+ Ack | <-- +-------+ | +-------+ | | ... | | | | +-------+ | +--------| HAn | | +-------+ Blue color: New control function Red color: defined two new mobility headers |