Optimal method for using multiple gateways in cellular IP networks

Cellular IP requires that a mobile host be using exactly one gateway to the Internet backbone with mobile IP at a time. When multiple gateways are used in a cellular IP network, the optimal design for the multiple domains is needed. In this paper an analytical model is presented for the performance analysis of a cellular IPv6 network with multiple gateways. Based on this model, an optimal system design can be theoretically found in terms of the network size, traffic load, user population, user mobility and routing algorithm for IP packets in a domain. Consequently, an algorithm is proposed for breaking a large cellular IP domain into two small domains, which can be easily used for the system selection in practice. Finally, some numerical results are demonstrated for a number of typical cases presented in the algorithm.