Operation mode switch of wireless headphones

1. A wireless audio system, comprising:

a first wireless headphone configured to:

establish a first short-range wireless link with an audio source for receiving audio information from the audio source, wherein the first wireless headphone is in a primary mode of a data relay approach to relay the audio information to a second wireless headphone that is in a secondary mode of the data relay approach;

transmit, to the second wireless headphone, link information associated with the first short-range wireless link in response to receiving a switch start instruction indicating to switch the primary and secondary modes of the first and second wireless headphones in the data relay approach;

transmit, to the second wireless headphone, an order message instructing the second wireless headphone to establish a second short-range wireless link with the audio source in response to receiving a confirmation message from the second wireless headphone indicative of receiving the link information, wherein upon an establishment of the second short-range wireless link, the first wireless headphone is configured to operate in a normal mode of a data snooping approach, and the second wireless headphone is configured to operate in a snooping mode of the data snooping approach to receive the audio information from the audio source via the second short-range wireless link; and

remove the first short-range wireless link with the audio source in response to receiving a success message from the second wireless headphone indicative of successfully establishing the second short-range wireless link with the audio source based on the link information, wherein the first wireless headphone is switched to the secondary mode of the data relay approach after going through the primary mode of the data relay approach and the normal mode of the data snooping approach; and the second wireless headphone configured to:

receive, from the first wireless headphone, the link information associated with the first short-range wireless link, wherein the second wireless headphone is in the secondary mode of the data relay approach;

in response to receiving the order message, establish the second short-range wireless link with the audio source based on the link information;

receive, from the audio source, the audio information over the second short-range wireless link, wherein the second wireless headphone is in the snooping mode of the data snooping approach; and

transmit, to the first wireless headphone, the success message in response to receiving the audio information over the second short-range wireless link within a threshold period, wherein the second wireless headphone is switched to the primary mode of the data relay approach after going through the secondary mode of the data relay approach and the snooping mode of the data snooping approach.

2. The wireless audio system of claim 1 , wherein the first wireless headphone is further configured to transmit, to the second wireless headphone, the link information when the first and second wireless headphones are in an idle state.

3. The wireless audio system of claim 1 , wherein each of the first and second short-range wireless links includes an asynchronous connectionless (ACL) link.

4. The wireless audio system of claim 1 , wherein each of the order message and the success message is transmitted via link manager protocol (LMP) in BLUETOOTH.

5. The wireless audio system of claim 1 , wherein each of the first short-range wireless link and the second short-range wireless link is a BLUETOOTH link.

6. The wireless audio system of claim 1 , wherein the first wireless headphone continues receiving the audio information from the audio source over the first short-range wireless link prior to the establishment of the second short-range wireless link between the second wireless headphone and the audio source.

7. The wireless audio system of claim 1 , wherein the first wireless headphone continues receiving the audio information from the audio source over the first short-range wireless link during an establishment of the second short-range wireless link between the second wireless headphone and the audio source.

8. The wireless audio system of claim 1 , wherein the link information comprises an address of the audio source and encryption parameters and frequency-hopping spread spectrum (FHSS) parameters between the audio source and the first wireless headphone.

9. The wireless audio system of claim 8 , wherein the address of the audio source comprises an IP address and a MAC address.

10. The wireless audio system of claim 1 , wherein:

the first wireless headphone is further configured to resume receiving, from the audio source, the audio information over the first short-range wireless link in response to receiving an unsuccess message from the second wireless headphone indicative of unsuccessfully establishing the second short-range wireless link with the audio source based on the link information; and

the first wireless headphone resumes the primary mode of the data relay approach.

11. The wireless audio system of claim 10 , wherein:

the second wireless headphone is further configured to transmit, to the first wireless headphone, the unsuccess message in response to not receiving the audio information over the second short-range wireless link within the threshold period; and

the second wireless headphone resumes the secondary mode of the data relay approach.

12. The wireless audio system of claim 10 , wherein the unsuccess message is transmitted via link manager protocol (LMP) in BLUETOOTH.