Method for managing communication between a contactless reader and a portable contactless device

A wireless unit able to establish a first communication channel with a contactless reader able to communicate using a first wireless technology configured to communicate in a short-range mode,

• wherein the wireless unit is configured to establish with a portable device a second communication channel using a second wireless technology, wherein said second wireless technology is an Ultra-Wide Band protocol which is configured:
• to operate with a range greater than that of said first wireless technology,
• to detect the position of the portable device with respect to the wireless unit,
• to handle an anti-collision phase,
• and wherein the wireless unit is configured to establish a bridge between the contactless reader and the portable device through said first and second communication channels only if the detected position of the portable device is located in a preset physical area associated with the contactless reader.

A portable device able to establish a direct communication channel with a contactless reader using a first wireless technology configured to communicate in a short-range mode,

• wherein the portable device is configured to establish a second communication channel, using a second wireless technology, with a wireless unit that communicates with the contactless reader, said second wireless technology being an Ultra-Wide Band protocol which is configured:
• to operate with a range greater than that of said first wireless technology,
• to detect the position of the portable device with respect to the wireless unit,
• to handle an anti-collision phase,
• and wherein the portable device is configured to exchange incoming messages generated by the contactless reader and outgoing messages targeting the contactless reader through said second communication channel only if the detected position of the portable device is located in a preset physical area associated with the contactless reader.