MASTER AND SLAVE OF BLUETOOTH COMMUNICATION SYSTEM CAPABLE OF DISCONNECTING CONNECTION
There is provided a Bluetooth communication system including a master device and a slave device. After a link is established by a paging procedure, the master device determines whether to stop the link according to a connection quality calculated by a controller thereof. Before replying an accepted message LMP_accepted to the master device, the slave device determines whether to reply the accepted message according to a connection quality calculated by a controller thereof.
1 . A master device, configured to establish a link with a slave device in a paging procedure of Bluetooth connection, the master device comprising:
a controller, configured to actively calculate a connection quality parameter according to packets from the slave device between an interval after the link is established and an LMP_setup_complete message is received; and
a host, configured to
receive the connection quality parameter from the controller, and
determine whether to terminate the link according to the connection quality parameter.
2 . The master device as claimed in claim 1 , wherein the connection quality parameter comprises at least one of a received signal strength indicator and an error rate.
3 . The master device as claimed in claim 1 , wherein the host is configured to
compare the connection quality parameter with a quality threshold, and
transmit a disconnect command to the controller when the connection quality parameter is smaller than the quality threshold.
4 . The master device as claimed in claim 3 , wherein the controller is configured to transmit an LMP_detach message to the slave device to terminate the link after receiving the disconnect command.
5 . The master device as claimed in claim 1 , wherein the controller is embedded with a vendor defined protocol configured to actively use the packets from the slave device to calculate and provide the connection quality parameter.
6 . The master device as claimed in claim 1 , wherein the controller is configured to actively provide the connection quality parameter to the host after receiving a NULL packet from the slave device.
7 . A master device, configured to establish a link with a slave device in a paging procedure of Bluetooth connection, the master device comprising:
a controller, configured to transmit an HCI_connection_complete message after receiving an LMP_setup_complete message from the slave device; and
a host, configured to transmit a quality requiring command to the controller to ask the controller to provide a connection quality parameter after receiving the HCI_connection_complete message from the controller.
8 . The master device as claimed in claim 7 , wherein the controller is embedded with a vendor defined protocol configured to use packets from the slave device to calculate and provide the connection quality parameter after receiving the quality requiring command.
9 . The master device as claimed in claim 7 , wherein the connection quality parameter comprises at least one of a received signal strength indicator and an error rate.
10 . The master device as claimed in claim 7 , wherein the host is configured to
compare the connection quality parameter with a quality threshold, and
transmit a disconnect command to the controller when the connection quality parameter is smaller than the quality threshold.
11 . The master device as claimed in claim 10 , wherein the controller is configured to transmit an LMP_detach message to the slave device to terminate the link after receiving the disconnect command.
12 . The master device as claimed in claim 7 , wherein the host is embedded with a vendor defined protocol configured to transmit the quality requiring command after receiving the HCI_connection_complete message.
13 . A slave device, configured to establish a link with a master device in a paging procedure of Bluetooth connection, the slave device comprising:
a controller, configured to reply an HCI_connection_request message after receiving an LMP_host_connection_req message from the master device; and
a host, configured to transmit a quality requiring command to the controller to ask the controller to provide a connection quality parameter after receiving the HCI_connection_request from the controller.
14 . The slave device as claimed in claim 13 , wherein the controller is embedded with a vendor defined protocol configured to use packets from the mater device to calculate and provide the connection quality parameter after receiving the quality requiring command.
15 . The slave device as claimed in claim 13 , wherein the connection quality parameter comprises at least one of a received signal strength indicator and an error rate.
16 . The slave device as claimed in claim 13 , wherein the host is configured to
compare the connection quality parameter with a quality threshold, and
transmit a disconnect command to the controller when the connection quality parameter is smaller than the quality threshold.
17 . The slave device as claimed in claim 16 , wherein the controller is configured to transmit an LMP_detach message to the master device to terminate the link after receiving the disconnect command.
18 . The slave device as claimed in claim 13 , wherein the host is configured to
compare the connection quality parameter with a quality threshold, and
transmit an HCI_accept_connection_request message to the controller when the connection quality parameter is larger than the quality threshold.
19 . The slave device as claimed in claim 18 , wherein the controller is configured to transmit an LMP_accepted message to the master device after receiving the HCI_accept_connection_request message.
20 . The slave device as claimed in claim 13 , wherein the host is embedded with a vendor defined protocol configured to transmit the quality requiring command according to the HCI_connection_request message.