Performing contactless applications in battery off mode

摘要

Contactless services, applications, and/or transactions can be performed between a mobile terminal and a contactless reader even when the mobile terminal battery power is found to be insufficient or if there is some other problem with the battery. Current is induced from electromagnetic (EM) fields or radio frequency (RF) signals detected near the mobile terminal such that sufficient power can be momentarily and/or temporarily used to access information from a smart card or other components within the mobile terminal, and allow user interaction via the contactless reader.

主权项

1. A method of an application selection in a first terminal, the method performed by the first terminal and comprising:
receiving a request for a transaction from a second terminal based upon a wireless communication status; selecting a battery mode of the first terminal from among a normal mode and a battery off mode according to whether a battery power of the first terminal is lower than a threshold level, wherein the battery off mode indicates that the first terminal provides part of services of the normal mode; performing a first application selection procedure using a first user interface of the first terminal and the battery power of the first terminal, when the normal mode is selected; performing a second application selection procedure using a second user interface of the second terminal and a power induced from electromagnetic fields between the first terminal and the second terminal, when the battery off mode is selected, wherein the second application selection procedure includes:
transmitting, to the second terminal, first application information indicating a first application for the transaction using the power induced from electromagnetic fields, andreceiving, from the second terminal, response information using the power induced from electromagnetic fields, the response information being acquired using the second user interface and indicating whether the first application is accepted.