Communication method, electronic device, and system for cross-device switching of multimedia content playback

A first electronic device comprising:

• a memory configured to store instructions;
• and
• one or more processors coupled to the memory and configured to execute the instructions to cause the first electronic device to:
• play multimedia content;
• send first synchronization information in a broadcast transmission to a second electronic device, wherein the first synchronization information comprises at least a first address, and wherein the first address is an address to obtain the multimedia content;
• send, through the broadcast transmission, a data packet using a first preset sending periodicity, wherein the data packet comprises the first synchronization information;
• send, when the first address or a multimedia content playback parameter changes, the data packet using a second preset sending periodicity within a first preset time period, wherein the second preset sending periodicity is less than the first preset sending periodicity, and wherein the multimedia content playback parameter comprises at least a playback speed;
• establish a near-field wireless communication connection to the second electronic device in response to a preset operation to signal the second electronic device to cache the multimedia content based on at least the first address;
• and
• send a control instruction to the second electronic device using the near-field wireless communication connection to signal the second electronic device to play the multimedia content based on the control instruction.

A second electronic device comprising:

• a memory configured to store instructions;
• and
• one or more processors coupled to the memory and configured to execute the instructions to cause the second electronic device to:
• receive, from a first electronic device, first synchronization information in a broadcast transmission, wherein the first synchronization information comprises a first playback progress, a first playback speed of multimedia content, and at least a first address, and wherein the first address is an address to obtain the multimedia content being played at the first electronic device;
• establish a near-field wireless communication connection with the first electronic device in response to a preset operation;
• cache, in response to the preset operation, the multimedia content based on at least the first address, wherein, when executed by the one or more processors, the instructions further cause the second electronic device to:
• further receive the first synchronization information at a first time point;
• detect the preset operation at a second time point;
• determine an estimated playback progress based on the first playback progress, the first playback speed, the first time point, and the second time point;
• and
• further cache the multimedia content based on the estimated playback progress and the first address;
• receive, using the near-field wireless communication connection, a control instruction from the first electronic device;
• and
• play the multimedia content based on the control instruction.