Patent ID: 6856892

Claim:
An information server apparatus included in a navigation system including an information server apparatus, a portable communication navigation apparatus for conducting navigation processing of assisting travel of a first mobile while conducting communication with the information server apparatus, and a mobile navigation apparatus for conducting navigation processing of assisting travel of a second mobile different from the first mobile independently of the information server apparatus while traveling together with the second mobile, wherein the navigation system comprising: a detecting device which detects whether first one of the communication navigation apparatus and the mobile navigation apparatus is started during execution of the navigation processing in second one of the communication navigation apparatus and the mobile navigation apparatus; a transfer device responsive to detection that one of the communication navigation apparatus and the mobile navigation apparatus is started, which transfers information for the navigation processing used in the second one of the communication navigation apparatus and the mobile navigation apparatus that has been operated until then, from the second one to the first one; and a start device which starts the navigation processing in the first one by using the transferred information, and wherein the information server apparatus comprises: a temporary stop request detecting device which detects whether a temporary stop request is received, the temporary stop request being transmitted from the communication navigation apparatus when the mobile navigation apparatus is started during execution of communication navigation processing, the communication navigation processing being the navigation processing conducted between the information server apparatus and the communication navigation apparatus, the temporary stop request indicating temporary stop of the communication navigation processing executed until then; a stop device responsive to reception of the temporary stop request, which temporarily stops the communication navigation processing and stores information used in the communication navigation processing executed until then; a resumption request detecting device which detects during temporary stop of the communication navigation processing whether a resumption request is received from the communication navigation apparatus, the resumption request indicating resumption of the communication navigation processing; and a resumption device responsive to reception of the resumption request, which resumes the communication navigation processing based on the resumption request and the stored information.