Fast paging method, bluetooth system and bluetooth connection method using the same
There is provided a fast paging procedure in which a master device repeatedly sends the paging message to a slave device using predetermined channel frequencies, wherein a selection of the predetermined channel frequencies is not calculated or predicted from the slave's Bluetooth device address. When the master device receives a slave page response message at one frequency among the predetermined channel frequencies, the master device transmits an FHS packet to the slave device at the same frequency in which the slave page response message was received.
1. A paging method of a master device, performed in a page substate of the master device for connecting to a slave device in a page scan substate, the paging method comprising:
transmitting a paging message sequentially at multiple predetermined frequencies in a predetermined sequence;
listening a slave page response message sent at one of the multiple predetermined frequencies; and
transmitting an frequency hop synchronization packet at the one of the multiple predetermined frequencies which the slave page response message is listened.
2. The paging method as claimed in claim 1 , wherein the paging message and the slave page response message comprise a device access code (DAC) of the slave device.
3. The paging method as claimed in claim 1 , wherein
a first frequency for transmitting the paging message is a lowest frequency, a highest frequency or any frequency among the multiple predetermined frequencies, and
a sequence from the first frequency to a last frequency among the multiple predetermined frequencies is a fixed pattern or a random pattern.
4. The paging method as claimed in claim 1 , wherein the multiple predetermined frequencies are selected before shipment of the master device.
5. The paging method as claimed in claim 1 , wherein the multiple predetermined frequencies are not calculated from a Bluetooth device address of the slave device.
6. The paging method as claimed in claim 1 , wherein the multiple predetermined frequencies has a number of 2, 4 or 8 frequencies.
7. The paging method as claimed in claim 6 , wherein the 4 frequencies are set previously and fixed at channels 0 , 16 , 32 and 64 or 0 , 24 , 48 and 72 among 79 RF channels of basic piconet physical channels of Bluetooth.
8. A Bluetooth system, comprising:
a master device configured to transmit a paging message sequentially at multiple predetermined frequencies in a predetermined sequence; and
a slave device configured to receive the paging message and respond a slave page response message at one frequency among the multiple predetermined frequencies, wherein
the master device is further configured to transmit an frequency hop synchronization (FHS) packet to the slave device at the same frequency receiving the slave page response message,
when the master device does not receive the slave page response message from the slave device after transmitting the paging message at one round of the multiple predetermined frequencies, the master device is configured to transmit the paging message at another round of the multiple predetermined frequencies, and
when the master device receives the slave page response message from the slave device, the master device is configured to stop transmitting the paging message.
9. The Bluetooth system as claimed in claim 8 , wherein the master device is configured as a secondary master and a primary slave, and the master device is further configured to have a synchronous link with a primary master.
10. The Bluetooth system as claimed in claim 8 , wherein the master device and slave device are respectively one of a pair of earphones.
11. The Bluetooth system as claimed in claim 8 , wherein the paging message and the slave page response message comprise a device access code (DAC) of the slave device.
12. The Bluetooth system as claimed in claim 8 , wherein the slave device is further configured to respond another page response message to the master device at the same frequency receiving the FHS packet.
13. The Bluetooth system as claimed in claim 8 , wherein the multiple predetermined frequencies are not calculated from a Bluetooth device address of the slave device.
14. The Bluetooth system as claimed in claim 8 , wherein the multiple predetermined frequencies has a number of 2, 4 or 8 frequencies.
15. The Bluetooth system as claimed in claim 14 , wherein the 4 frequencies are set previously and fixed at channels 0 , 16 , 32 and 64 or 0 , 24 , 48 and 72 among 79 RF channels of basic piconet physical channels of Bluetooth.
16. A Bluetooth connection method between a master device and a slave device, the method comprising:
transmitting, by the master device, a paging message sequentially at multiple predetermined frequencies to the slave device in a predetermined sequence;
responding, by the slave device, a slave page response message at one frequency among the multiple predetermined frequencies to the master device;
transmitting, by the master device, an frequency hop synchronization (FHS) packet to the slave device at the same frequency receiving the slave page response message to the slave device;
responding, by the slave device, another page response message at the same frequency receiving the FHS packet to the master device; and
transmitting, by the master device after receiving the another page response message, a POLL packet using a new hopping sequence determined according to a Bluetooth device address of the master device, wherein
when the master device does not receive the slave page response message from the slave device after transmitting the paging message at one round of the multiple predetermined frequencies, the master device transmits the paging message at another round of the multiple predetermined frequencies, and
when the master device receives the slave page response message from the slave device, the master device stops transmitting the paging message.
17. The Bluetooth connection method as claimed in claim 16 , wherein the multiple predetermined frequencies are not calculated from a Bluetooth device address of the slave device.
18. The Bluetooth connection method as claimed in claim 16 , wherein the multiple predetermined frequencies are selected equally over 79 RF channels of basic piconet physical channels of Bluetooth.
19. The Bluetooth connection method as claimed in claim 16 , wherein
the multiple predetermined frequencies has a number of 2 frequencies, and
the 2 frequencies are set previously and fixed at channels 0 and 32 , at channels 0 and 24 , at channels 16 and 64 or at channels 48 and 72 among 79 RF channels of basic piconet physical channels of Bluetooth.
20. The Bluetooth connection method as claimed in claim 16 , wherein
the multiple predetermined frequencies has a number of 4 frequencies, and
the 4 frequencies are set previously and fixed at channels 0 , 16 , 32 and 64 or 0 , 24 , 48 and 72 among 79 RF channels of basic piconet physical channels of Bluetooth.