Qualcomm Incorporated

Ashish Banthia

Mahbod Mofidi

Alberto Salcedo

Vincent So

Eunmo Kang

Pranav Iyengar

Jeremy R O'Donoghue

Alan Gillespie

Paul Denboer

Xiao Deng

Vikram Meka

A method for wireless communication is described. The method includes using a routing table for multiple secure elements. The routing table assigns a preferred secure element for a transaction type. The method also includes selecting a first secure element for a transaction based on the routing table. The method further includes updating the routing table based on a received command to use a second secure element to complete the transaction.

Systems and methods for adaptive routing for multiple secure elements

A method for wireless communication by a wireless communication device is described. The method includes receiving geographic location information. The method also includes querying a geographic location tuning database for tuning parameter values corresponding with the geographic location information. The method further includes determining one or more tuning parameters to change based on the tuning parameter values. The method additionally includes adjusting an antenna for inductively coupled communication with a reader device according to the determined tuning parameters.

Systems and methods for location-based tuning

A method for communications is described. The method includes determining a symbol timing drift elimination amount for a received signal. The method further includes eliminating part of the symbol timing drift by adjusting a reference clock for the modem. Determining the symbol timing drift elimination amount may be based on at least one of a symbol timing drift estimate, a symbol timing error, a packet acquisition indicator, a packet validity indicator, demodulated bits or a carrier presence indicator.

Systems and methods for symbol time tracking

A method includes counting a number of successive information frame (I-frame) retransmissions due to a guard timer expiring. A contactless front-end (CLF) transmits the I-frame to a secure element (SE) over a single wire protocol (SWP) interface. The method also includes discontinuing I-frame retransmission when the count equals a retransmission threshold. The method further includes deactivating the SWP interface.

Systems and methods for mitigating effects of an unresponsive secure element

Aspects disclosed herein relate to activating a single wire protocol (SWP) interface with a circuit card. A single wire protocol (SWP) activation procedure is initiated with a circuit card. During the SWP activation procedure, an unexpected frame may be received, and a different SWP activation procedure may be initiated with the circuit card based at least in part on receiving the unexpected frame during the SWP activation procedure.

Techniques for activating single wire communications

A method of communicating with a secure element (SE) is described. The method includes transmitting successive RSET frames from a single wire protocol (SWP) interface to an SE, the successive RSET frames including RSET frame retransmissions. The method also includes counting a number of successive RSET frame retransmissions due to a timer expiring. The method further includes generating a firmware interrupt in response to determining that the count has reached a threshold. The method additionally includes deactivating the SWP interface based on the firmware interrupt.

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San Diego, CA, United States of America

Ashish Banthia