A porta-pack is a wearable unit of a MeshNetwork that contains 
 * a wireless access point (ASUS WL-HDD for now),
 * an operation interface (USB phone for now),
 * a webcam,
 * a speaker,
 * storage (CF card or 2.5" hard disk),
 * relevant softwares to integrate the hardwares to work seamlessly together,
 * the pack (backpack or belt or anything) that have all the hardwares attached on.