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Methods and apparatus for improving resolution among devices with different size NFC identifiers

A technology for identifiers and devices, which is applied to devices with near-field communication, branch equipment, near-field transmission systems in radio frequency identification systems, etc., and can solve the problem of not providing unresolved device indications.

Inactive Publication Date: 2014-09-10
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as currently implemented, the process can be done with one or more devices still unresolved, while providing no indication that there are still unresolved devices
This flaw arises because only a single bit is used to track whether a collision is still pending

Method used

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  • Methods and apparatus for improving resolution among devices with different size NFC identifiers
  • Methods and apparatus for improving resolution among devices with different size NFC identifiers
  • Methods and apparatus for improving resolution among devices with different size NFC identifiers

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Embodiment Construction

[0022] Various aspects are now described with reference to the figures. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more aspects. It may be evident, however, that these aspects may be practiced without the use of these specific details.

[0023] In general, this paper describes improved procedures for conflict resolution by introducing mechanisms for tracking conflicts at each cascade level (eg, cascade level conflict parameters). When a collision occurs at a given cascade level, the accompanying cascade level violation value in the cascade level violation parameter can be set. Therefore, collision resolution can continue because the original cascade level flag can still be set even when the collision resolution process increases the cascade level to resolve double or triple size NFCIDs. When there are no unresolved conflicts at any cascading level, the process ends ...

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PUM

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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).

Description

[0001] Claiming Priority Based on 35 U.S.C. §119 [0002] This application for patent claims priority to Provisional Application No. 61 / 594,268, filed February 2, 2012, entitled "METHODS ANDAPPARATUS FOR IMPROVING RESOLUTION AMONG DEVICES WITHDIFFERENT SIZE NFC IDENTIFIERS," which is assigned to the assignee, is hereby expressly incorporated herein by reference. technical field [0003] In general, the disclosed aspects relate to communication between and / or within devices, and in particular, to methods and systems for improving resolution between various devices, wherein the devices are operable to use NFC Type A radio frequency (RF) technology and uses a double or triple size Near Field Communication (NFC) Identifier (NFCID) for identification. Background technique [0004] Improvements in technology have resulted in smaller and more powerful personal computing devices. For example, there currently exist a wide variety of portable personal computing devices, including wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M1/725G06K7/10H04W4/00H04M1/72412
CPCH04W4/008H04M2250/04G06K7/10029H04B5/0062H04M1/7253H04W4/80H04M1/72412H04B5/77
Inventor J·伊利安D·金加兰德
Owner QUALCOMM INC