Communication system and synchronization method

A communication system, comprising:

• a first electronic apparatus, comprising:
• a first control circuit;
• a first radio frequency transceiver coupled with the first control circuit, the first radio frequency transceiver being configured to generate a first interrupt signal to the first control circuit and transmit a radio frequency packet;
• and
• a first wireless communication transceiver configured to transmit an wireless communication packet in an wireless communication active time slot;
• and
• a second electronic apparatus, comprising:
• a second control circuit;
• a second radio frequency transceiver coupled with the second control circuit, the second radio frequency transceiver being configured to receive the radio frequency packet and generate a second interrupt signal to the second control circuit in response to that the radio frequency packet is received;
• and
• a second wireless communication transceiver configured to receive the wireless communication packet from the first electronic apparatus;
• wherein the first interrupt signal is configured to trigger a first timer of the first control circuit, the second interrupt signal is configured to trigger a second timer of the second control circuit, the second timer is synchronized with the first timer or a timestamp of the first timer is estimated according to the second interrupt signal and the radio frequency packet,
• wherein a first transmission latency between the first radio frequency transceiver and the second radio frequency transceiver is shorter than a second transmission latency between the first wireless communication transceiver and the second wireless communication transceiver,
• wherein the wireless communication packet is generated by the first wireless communication transceiver in accordance with the first timer, and the wireless communication packet is sampled by the second wireless communication transceiver in accordance with the second timer.