Data transfer with wirelessly powered communication devices

In a system comprising one or more reader devices and a plurality of wirelessly powered communication devices, the reader device has a transceiver to transmit a wireless signals to scan proximate wirelessly powered communication devices. The reader device also establishes communications with a proximate wirelessly powered communication device, forms a session with the proximate wirelessly powered communication devices, communicates in the session with the wirelessly powered communication device, and maintains a state of the session.