A navigation system for a vehicle determines a recommended route to a destination among a plurality of possible routes to the destination based on total profile values of the plurality of possible routes. MAFN data and VMAFN data are defined so as to indicate the maximum frame number of all frames formed in a partition and the maximum frame number of frames in a valid area in the partition, respectively. After the assignment, the host network layer address and the sequence value are included in an advertisement for transmission. The housing 112 and cap 130 are arranged so that upon removal of the cap 130 from the housing 112, the boot 118 is removed from the syringe 114.