At present, IoT is experiencing a rapid development, and this is due to a number of factors including IPv6, 4G, cost and the availability of this technology. According to Gartner, Inc., there will be nearly 24 billion internet-connected devices globally by 2020. ABI Research estimates that more than 30 billion devices will be connected wirelessly by Internet of Things by 2020.
Despite its rapid development, there are still many obstacles for the development of IoT. First, the divergence between “communication language” and “communication method” of identifiers in each separate system. This is probably the most difficult problem to handle, which blocks the progress of IoT and make “connected things” hard to communicate, understand and react to each other.