Multi-member Bluetooth device capable of dynamically switching operation mode, and related main Bluetooth circuit and auxiliary Bluetooth circuit

A main Bluetooth circuit (110) of a multi-member Bluetooth device (100) utilized to operably conduct data transmission with a remote Bluetooth device (102) and comprising the main Bluetooth circuit (110) and an auxiliary Bluetooth circuit (120) which selectably operates at a sniffing mode or a relay mode, the main Bluetooth circuit (110) comprising:

• a first Bluetooth communication circuit (111);
• a first packet parsing circuit (113), arranged to operably parse packets received by the first Bluetooth communication circuit (111);
• and
• a first control circuit (117), coupled with the first Bluetooth communication circuit (111) and the first packet parsing circuit (113);
• wherein in a period during which the auxiliary Bluetooth circuit (120) operates at the relay mode, the first control circuit (117) utilizes the first Bluetooth communication circuit (111) to receive packets transmitted from the remote Bluetooth device (102), and utilizes the first Bluetooth communication circuit (111) to forward received packets to the auxiliary Bluetooth circuit (120), and the auxiliary Bluetooth circuit (120) receives packets forwarded from the first Bluetooth communication circuit (111), but the auxiliary Bluetooth circuit (120) does not sniff packets issued from the remote Bluetooth device (102);
• in a situation of that a signal reception quality indicator of the auxiliary Bluetooth circuit (120) is superior to a predetermined indicator value, the auxiliary Bluetooth circuit (120) switches from the relay mode to the sniffing mode;
• and
• in a period during which the auxiliary Bluetooth circuit (120) operates at the sniffing mode, the first control circuit (117) utilizes the first Bluetooth communication circuit (111) to receive the packets transmitted from the remote Bluetooth device (102), and the auxiliary Bluetooth circuit (120) sniffs the packets issued from the remote Bluetooth device (102).

An auxiliary Bluetooth circuit (120) of a multi-member Bluetooth device (100) utilized to operably conduct data transmission with a remote Bluetooth device (102) and comprising a main Bluetooth circuit (110) and the auxiliary Bluetooth circuit (120), the auxiliary Bluetooth circuit (120) comprising:

• a second Bluetooth communication circuit (121);
• a second packet parsing circuit (123), arranged to operably parse packets received by the second Bluetooth communication circuit (121);
• and
• a second control circuit (127), coupled with the second Bluetooth communication circuit (121) and the second packet parsing circuit (123), arranged to operably control operations of the auxiliary Bluetooth circuit (120) under a sniffing mode and a relay mode;
• wherein in a period during which the auxiliary Bluetooth circuit (120) operates at the relay mode, the main Bluetooth circuit (110) receives packets transmitted from the remote Bluetooth device (102) and forwards received packets to the auxiliary Bluetooth circuit (120), and the second control circuit (127) utilizes the second Bluetooth communication circuit (121) to receive packets forwarded from the main Bluetooth circuit (110), but the second control circuit (127) does not utilize the second Bluetooth communication circuit (121) to sniff packets issued from the remote Bluetooth device (102);
• in a situation of that a signal reception quality indicator of the second Bluetooth communication circuit (121) is superior to a predetermined indicator value, the auxiliary Bluetooth circuit (120) switches from the relay mode to the sniffing mode;
• and
• in a period during which the auxiliary Bluetooth circuit (120) operates at the sniffing mode, the main Bluetooth circuit (110) receives the packets transmitted from the remote Bluetooth device (102), and the second control circuit (127) utilizes the second Bluetooth communication circuit (121) to sniff the packets issued from the remote Bluetooth device (102).