Route optimization for network mobility with tree-based care of address

Network mobility (NEMO) supports the movement of some part of the network that a group of the mobile nodes (MNs) or the mobile routers (MRs) moves together. To support NEMO, the NEMO basic support protocol (NBSP) was proposed. In the nested mobile network, however, the NBSP exhibits pinball routing problem. As the degree of nesting increase, the problem becomes more serious. In this paper, we propose a new NEMO management scheme using tree-based care of address (TCoA) and mobile network prefix (MNP). In proposed scheme, all the MRs belonging to the Root-MR in the nested mobile network configure their care-of addresses (CoA) based on the MNP of Root-MR. It mitigates the pinball routing problem. Performance analysis indicates that proposed scheme can reduce end-to-end packet delay and handoff delay.