Low-cost RFID Tags as IPv6 Nodes in the Internet of Things

RFID tags can no longer be treated as pure bar-code substitute as their functional capabilities increase rapidly. Many of them are able to store and compute data, or hold sensors. The data flow in the EPCglobal network, which was created for “traditional” low-cost tags, does only work one-way: from tags to a couple of servers where data for the tags is stored and can be accessed by other readers or servers. To draw advantage from the increased functionality of the tags it will become important to have a two-way end-to-end communication between servers and tags, e.g. to remotely change data on the tags.