Emulation of multiple NFC devices inside a communication device

摘要

Communication device (T1) comprising—An antenna (A1) and physical circuitry (PHY) for receiving a poll command (PC) from a second communication device (T2).—A plurality of entities (D1, D2, D3 . . . Dn) emulating NFC devices,—An arrangement for deciding, for each entity of said plurality of entities, if a response should be sent and if so sending a response (LF1, LF2, LF3 . . . LFn) to said second communication device (T2), containing information related to the respective NFC device.

主权项

1. A method for a first communication device in listen mode to answer to a poll command sent by a second communication device, said first communication device emulating a plurality of NFC devices and said method comprising the steps of:
Receiving said poll command by said first communication device; For each of said plurality of NFC devices, deciding if a response should be sent and if so, sending, for each of the plurality of NFC devices for which it is decided that a response should be sent, a response to said second communication device containing information related to one of the plurality of NFC devices for which it is decided that a response should be sent, wherein the steps of deciding and sending a response are performed by contactless front-ends of each of said plurality of NFC devices, wherein at least two different responses are sent to the second communication device, via the first communication device, by at least two NFC devices of the plurality of NFC devices, and wherein the contactless front-ends of each of said plurality of NFC devices each determine its own identifier by randomly generating a portion of the identifier, wherein the identifier is included in the information related to the one of the plurality of NFC devices for which it is decided that the response should be sent and the identifier is included in the response.