**2.1 Passage assistance technology for the visually impaired of NAVIWORKS**

When the NAVIWALK cane developed in Korea comes into contact with the radio frequency identification (RFID)-tag-inserted braille block, there is a product that reads the data of the current location and guide information stored in the tag and provides it with voice.

For this purpose, the RFID tag embedded in the braille block is detected through the antenna of the tip of the carrying cane (**Figure 3**). Because NAVIWALK is an offline system, it is easy to build and has low construction and operation costs, and it is easy to add, change, and modify location information and information messages wirelessly without physical changes, so because there are no restrictions on RFID tag installation, generally, it is suitable for commercialization. The principle of operation is that when the NAVIWALK cane comes into contact with the RFID-tag-inserted braille block, the data of the current location and guide information stored in the tag are read and provided as voice information to provide information to the visually impaired.
