Patent ID: 8514688

Claim:
A communication device, comprising: means for generating an RF (radio frequency) signal; means for modulating the RF signal and for modulating a received RF signal of another device; means for demodulating a second RF signal provided to the communication device from the another device; and means for detecting the second RF signal of the another device, wherein the means for generating is actuated to initiate an active or a passive mode communication, when the means for detecting does not detect the second RF signal at a level of a first RF field strength threshold or more, the active mode including a transmission of modulated data at the communication device and the another device, the passive mode providing a load modulated communication from the another device to the communication device, and, when the communication device receives an indication to start a communication of the active mode from the another device, the communication device receives data from the another device at a level of a second RF field strength threshold or more, the second RF field strength threshold being higher than the first RF field strength threshold.