Patent ID: 7805605

Claim:
A server system for implementation within a communication system that includes a terminal control device, the server system comprising: a processor that issues and guarantees a public key certification for a terminal device; a memory that holds prefix allocation allow/prohibit information of the terminal device, the prefix allocation allow/prohibit information indicating whether allocation of a prefix to the terminal device is allowed or prohibited; and a communications interface that receives a public key issue certification request from said terminal device, rewrites said prefix allocation allow/prohibit information, and communicates with a terminal control device to manage the terminal device and to manage location information of the terminal device, wherein said processor is implemented to run a first routine in which the public key certification issue request is received from said terminal device, the public key certification of said terminal device is issued, said prefix allocation allow/prohibit information is rewritten, and said public key certification is sent to said terminal device, said processor is implemented to run a second routine in which an inquiry on whether prefix allocation is allowed or prohibited is received from said terminal control device, said prefix allocation allow/prohibit information is searched, and the prefix allocation allow/prohibit information acquired is sent to said terminal control device, and the terminal control device has a DHCP-PD function and allocates prefix information to the terminal device based on the prefix allocation allow/prohibit information using the DHCP-PD function.