| CPC G06F 1/30 (2013.01) [G06F 11/0772 (2013.01); G06F 13/28 (2013.01)] | 28 Claims |

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1. A method for an electronic device in a power mode change operation, the method comprising:
by the electronic device, during the power mode change operation, detecting whether a power mode change failure occurs in the electronic device after transmitting a power mode change request frame; and
by the electronic device, in response to the power mode change failure in the electronic device, transmitting a first burst ending signal in a first burst to another electronic device to notify the other electronic device of the power mode change failure in the electronic device, wherein the first burst ending signal indicates burst closure and includes a first error indication signal to indicate the power mode change failure in the electronic device.
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