US 11,943,609 B2
Bluetooth communication system capable of increasing generation efficiency of cypher keys required for data transmission between bluetooth host device and bluetooth device set, and related bluetooth device set
Yu Hsuan Liu, Hsinchu (TW); Yung Chieh Lin, Hsinchu (TW); and Po Sheng Chiu, Hsinchu (TW)
Assigned to Realtek Semiconductor Corp., Hsinchu (TW)
Filed by Realtek Semiconductor Corp., Hsinchu (TW)
Filed on Jan. 10, 2022, as Appl. No. 17/572,081.
Claims priority of provisional application 63/135,720, filed on Jan. 10, 2021.
Prior Publication US 2022/0224526 A1, Jul. 14, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 9/08 (2006.01); G06F 3/0482 (2013.01); H04L 9/14 (2006.01); H04W 4/80 (2018.01); H04W 8/00 (2009.01); H04W 12/03 (2021.01); H04W 12/037 (2021.01); H04W 12/041 (2021.01); H04W 12/0471 (2021.01); H04W 12/50 (2021.01); H04W 12/55 (2021.01); H04W 76/15 (2018.01); H04W 84/18 (2009.01)
CPC H04W 12/041 (2021.01) [G06F 3/0482 (2013.01); H04L 9/0866 (2013.01); H04L 9/14 (2013.01); H04W 4/80 (2018.02); H04W 8/005 (2013.01); H04W 12/03 (2021.01); H04W 12/037 (2021.01); H04W 12/0471 (2021.01); H04W 12/50 (2021.01); H04W 12/55 (2021.01); H04W 76/15 (2018.02); H04W 84/18 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A Bluetooth communication system (100), comprising:
a Bluetooth host device (110), comprising:
a host-side communication circuit (111);
a host-side cypher key generation circuit (115); and
a processing circuit (117), coupled with the host-side communication circuit (111) and the host-side cypher key generation circuit (115), and arranged to operably control operations of the host-side communication circuit (111) and the host-side cypher key generation circuit (115); and
a Bluetooth device set (102), comprising at least a first member device (120) and a second member device (130);
wherein the first member device (120) comprises:
a first communication circuit (121), arranged to operably conduct wireless communications with the host-side communication circuit (111);
a first cypher key generation circuit (123); and
a first control circuit (125), coupled with the first communication circuit (121) and the first cypher key generation circuit (123), and arranged to operably generate a first resolvable set identifier (RSI-1) corresponding to the first member device (120) according to a device set identification information corresponding to the Bluetooth device set (102), and arranged to operably generate one or more target Bluetooth advertising packets containing a device information of the first member device (120) and the first resolvable set identifier (RSI-1), and arranged to operably utilize the first communication circuit (121) to transmit the one or more target Bluetooth advertising packets to the Bluetooth host device (110);
wherein the second member device (130) comprises:
a second communication circuit (131), arranged to operably conduct wireless communications with the host-side communication circuit (111); and
a second control circuit (135), coupled with the second communication circuit (131), arranged to operably control operations of the second communication circuit (131), and arranged to operably generate a second resolvable set identifier (RSI-2) corresponding to the second member device (130) according to the device set identification information;
wherein the host-side communication circuit (111) is further arranged to operably receive the one or more target Bluetooth advertising packets;
wherein the processing circuit (117) is further arranged to operably control a display device (150) to display a candidate device list, and to display a single device item for representing the Bluetooth device set (102) in the candidate device list, but does not simultaneously display two device items for respectively representing the first member device (120) and the second member device (130) in the candidate device list;
wherein the processing circuit (117) is further arranged to operably identify the first member device (120) as a first privileged device according to a position of the first resolvable set identifier (RSI-1) in the one or more target Bluetooth advertising packets, and after identifying the first member device (120) as the first privileged device, the processing circuit (117) is further arranged to operably transmit a first privileged pairing notice to the first member device (120) through the host-side communication circuit (111), and to operably generate a first cypher key (Key-1);
wherein the first control circuit (125) is further arranged to operably generate a second cypher key (Key-2) corresponding to the first cypher key (Key-1) after the first privileged pairing notice is received by the first communication circuit (121).