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1. (WO2013116372) METHODS AND APPARATUS FOR IMPROVING RESOLUTION AMONG DEVICES WITH DIFFERENT SIZE NFC IDENTIFIERS

Pub. No.:    WO/2013/116372    International Application No.:    PCT/US2013/023905
Publication Date: Fri Aug 09 01:59:59 CEST 2013 International Filing Date: Thu Jan 31 00:59:59 CET 2013
IPC: H04M 1/725
G06K 7/10
H04W 4/00
Applicants: QUALCOMM INCORPORATED
Inventors: HILLAN, John
CHINGALANDE, Dubai
Title: METHODS AND APPARATUS FOR IMPROVING RESOLUTION AMONG DEVICES WITH DIFFERENT SIZE NFC IDENTIFIERS
Abstract:
Aspects disclosed herein relate to improving NFC-A device collision resolution in an environment with different NFCID sizes. In one example, a communications device (502) is equipped to determine (514) a colliding bit in a first NFCID that has a byte length corresponding to a first cascade level value, set (516) a cascade level collision value based on the first cascade level value, generate a second NFCID by selecting a value for the colliding bit, determine that a byte length associated with the second NFCID results in an incomplete NFCID for a first remote NFC device (504), obtain (522) a further part of the second NFCID using a second cascade level value that corresponds to a longer byte length NFCID than the first cascade level value, determine (524) that at least one other remote NFC device is not yet identified based on the set cascade level collision value, and obtain (528,530,532) a third NFCID that corresponds to a second remote NFC device (506).