| 摘要 |
The present invention discloses a working mode negotiating method, device, and system, and belongs to the field of wireless communications. The method includes: receiving, by a first device, a negotiation message that a second device sends after detecting the first device; activating, by the first device, a P2P mode when determining that information about a commodity for which a prepayment has been made successfully needs to be acquired from the second device; or activating a card emulation mode when information about a commodity for which a prepayment has been made successfully does not need to be acquired from the second device; sending, by the first device, an activated working mode to the second device, so that the second device activates a working mode that is the same as the activated working mode; and performing communication according to the activated working mode when the first device and the second device perform communication by using an NFC technology. The present invention improves a success rate of near field communication. |
