| 摘要 |
The method is for initiating a transaction. A communication device (102) is in communication with a plurality of POS devices (104, 106 and 108) via a network (111) and senses a magnetic field (105a, 107a) of a magnet (105, 107). The communication device (102) sends a turning off command (112) to the first device to turn off the magnetic field (105a) of the magnet (105) and checks whether a magnetic field still exists. When no magnetic field exist, the communication device (102) determining that the communication device (102) is in close proximity of magnet (105) of the first device (104) and initiating a transaction with the first device (104). If a magnetic field still exists, the device sends turning-off commands to another POS device until the magnetic field is turned off to identify which POS device the communication device is next to. |
