Near field communication host controller interface

A method for near field communication with a target device, the method performed by the source device and comprising:

• transmitting, by the source device, a first command message in order to obtain information of a mode of the target device;
• receiving, by the source device in response to the first command message, a first response message including the information, wherein the information indicates either a sleep mode or an active mode;
• identifying, by the source device, whether the indicator mode of the target device is the sleep mode or the active mode based on the received first response message;
• transmitting, by the source device, a second command message when the identified mode of the target device is the sleep state, wherein the second command message causes the target device to be activated;
• receiving, by the source device, a second response message in response to the second command message;
• and
• transmitting, by the source device, a data message when the second command message is determined to be successfully processed by the target device based on the second response message.

A source device for near field communication with a target device, the source device comprising,

• an interface unit configured to at least transmit a message to the target device or receive a message from the target device;
• and
• a controller configured to:
• transmit, via the interface unit, a first command message in order to obtain information of a mode of the target device,
• receive, via the interface unit in response to the first command message, a first response message including the information, wherein the information indicates either a sleep mode or an active mode,
• identify whether the indicated mode of the target device is the sleep mode or the active mode based on the received first response message,
• transmit, via the interface unit, a second command message when the identified mode of the target device is the sleep state, wherein the second command message causes the target device to be activated,
• receive, via the interface unit, a second response message in response to the second command message, and
• transmit, via the interface unit, a data message when the second command message is determined to be successfully processed by the target device based on the second response message.