Methods and apparatus for improving the identification of multiple NFC-A devices

摘要

Aspects disclosed herein relate to improving technology detection and collision resolution among multiple NFC devices using a NFC type-A RF technology. In one example, a communications device is equipped to determine that a first device sensing response message includes one or more collisions, identify a first remote NFC device of the plurality of remote NFC devices by performing collision resolution on the first device sensing response message, transmit a sleep request message to the first remote NFC device that prohibits the first remote NFC device from responding to a first device sensing request message and the first device sensing request message, receive a second device sensing response message that includes collisions among the plurality of remote NFC devices, and identify a second remote NFC device of the plurality of remote NFC devices by performing collision resolution on the second device sensing response message.

主权项

1. A method of wireless communications, comprising:
determining that a first device sensing response message includes one or more collisions among a plurality of remote near field communication (NFC) devices; identifying a first remote NFC device of the plurality of remote NFC devices by performing collision resolution on the first device sensing response message; transmitting a sleep request message to the first remote NFC device, which causes the first remote NFC device to transition to a sleep state that prohibits the first remote NFC device from responding to a first device sensing request message; transmitting the first device sensing request message; receiving a second device sensing response message that includes collisions among the plurality of remote NFC devices; identifying a second remote NFC device of the plurality of remote NFC devices by performing collision resolution on the second device sensing response message; storing the first device sensing response message in a first location in a storage structure, and the second device sensing response message in a second location in the storage structure; receiving a collision free device sensing response message; and determining collision free versions of the first and second device sensing response messages by analyzing the first device sensing response message in the first location and the second device sensing response message in the second location in the storage structure using the received collision free device sensing response message.