Methods and apparatus for improving collision resolution among multiple NFC-A devices

摘要

Aspects disclosed herein relate to providing an improved collision resolution mechanism for handling multiple NFC-A devices where one or more of the NFC-A devices may not support SDD. In one example, a communications device is equipped to determine that a remote NFC device of two or more remote NFC devices supports SDD, resolve the remote NFC device of the two or more remote NFC devices using SDD, and determine whether a remaining remote NFC device of the two or more remote NFC devices supports SDD. In an aspect in which the remaining remote NFC device does not support SDD, the communications device may be equipped to set a flag indicating that unresolved remote NFC devices are present and/or send a read identifier (RID) message to the remaining remote NFC device.

主权项

1. A method of wireless communication, comprising:
determining that a remote near field communication (NFC) device of two or more remote NFC devices supports single device detection (SDD) based on reception of one or more sensing response (SENS_RES) messages from the remote NFC device in response to a device sensing request message (SENS_REQ) transmitted to the two or more remote NFC devices; resolving the remote NFC device of the two or more remote NFC devices using SDD commands; determining whether a remaining remote NFC device of the two or more remote NFC devices supports SDD in response to resolving the remote NFC device; resolving the remaining remote NFC device using SDD commands upon a determination that the remaining remote NFC device supports SDD; and setting a flag indicating that one or more unresolved remote NFC devices are present upon a determination that the remaining remote NFC device does not support SDD.