| 摘要 |
A communication controller transmits current location information of a subject apparatus to another pre-registered apparatus, and receives current location information of the another pre-registered apparatus. A location relationship determiner determines whether the subject apparatus precedes the another apparatus in a heading direction. An operation mode determiner operates the subject apparatus as a main device when it is determined that the subject apparatus precedes the another apparatus in the heading direction, and operates the subject apparatus as a sub device when it is determined that the subject apparatus does not precede the another apparatus in the heading direction. A function selector activates a function of transmitting heading direction information to the another apparatus when the subject apparatus is determined to be a main device, and activates a function of receiving the heading direction information from a main device when the subject apparatus is determined to be a sub device. |
