Anycast Subnet Optimization for Efficient IPv6 Mobility Management

In this paper we propose a new IPv6 micromobility framework together with a subnet forming algorithm for providing more seamless handover, while being able to coexist with the standard IPv6 macromobility protocol (MIPv6). Our framework is based on the IPv6 anycasting paradigm called anycast-based micromobility, where a scoped-anycast care-of-address is assigned for the visiting mobile nodes while moving in a given subnet (i.e. micromobility domain). According to the anycast communication model defined in IPv6, packets sent to the anycast CoA will be always optimally routed to the actual position of the mobile node in a given subnet. A simulated annealing based anycast subnet forming algorithm (SABAS) is also elemental part of our work aiming to demonstrate how IPv6 anycasting can be utilized for efficient micromobility. SABAS uses the handover and incoming session metrics generated by our mobile environment simulator.