# US 2019/0174232 A1 · Operation mode switch of wireless headphones > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0174232 A1 - Document ID: US20190174232A1 - Status: Published application - Kind: A1 - Application number: 16/264,565 - Filed: 2019-01-31 - Published: 2019-06-06 - Earliest claimed: 2017-10-18 - Assignees: Bestechnic (Shanghai) Co., Ltd. - Applicants: Bestechnic (Shanghai) Co., Ltd. - Inventors: Weifeng Tong; Liang Zhang; Qianli Ma; Junhong Liu; Tianxu Wu; Fei Luo - Web page: https://patentgrep.com/patent/US20190174232A1 ## CPC - H04R 5/033: Headphones for stereophonic communication {(details thereof, e.g. relating to batteries, cables or control elements H04R1/10)} - H04W 4/80: Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication - H04R 1/1041: {Mechanical or electronic switches, or control elements (switches in general H01H)} - H04R 2201/107: Monophonic and stereophonic headphones with microphone for two-way hands free communication - H04R 2420/07: Applications of wireless loudspeakers or wireless microphones - Y02D 30/70: in wireless communication networks - H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract Embodiments of wireless audio systems and methods for operation mode switch of wireless headphones are disclosed herein. In one example, a wireless audio system includes a first wireless headphone and a second wireless headphone. The first wireless headphone is configured to establish a first short-range wireless link with an audio source; transmit, to a second wireless headphone, link information associated with the first short-range wireless link; and remove the first short-range wireless link with the audio source in response to the second wireless headphone successfully establishing a second short-range wireless link with the audio source based on the link information. The second wireless headphone is configured to receive, from the first wireless headphone, the link information associated with the first short-range wireless link; and establish the second short-range wireless link with the audio source based on the link information. ## Claims ### Claim 1 A wireless audio system, comprising: a first wireless headphone configured to: establish a first short-range wireless link with an audio source; transmit, to a second wireless headphone, link information associated with the first short-range wireless link, 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; 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; 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; and resume receiving, from the audio source, 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; a second wireless headphone configured to: receive, from the first wireless headphone, the link information associated with the first short-range wireless link; 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; 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; and 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. ### Claim 2 (depends on 1) 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. ### Claim 3 (depends on 1) The wireless audio system of claim 1, wherein each of the first and second short-range wireless links includes an asynchronous connectionless (ACL) link. ### Claim 4 (depends on 1) The wireless audio system of claim 1, wherein each of the order message, the success message, and the unsuccess message is transmitted via link manager protocol (LMP) in BLUETOOTH. ### Claim 5 (depends on 1) 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. ### Claim 6 (depends on 1) The wireless audio system of claim 1, wherein the address of the audio source comprises an IP address and a MAC address. ### Claim 7 A wireless audio system, comprising: a first wireless headphone configured to: establish a first short-range wireless link with an audio source; transmit, to a second wireless headphone, link information associated with the first short-range wireless link, 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; receive, from the audio source, audio information over the first short-range wireless link; and transmit, to the second wireless headphone, a stop-snooping message to instruct the second wireless headphone to stop snooping; a second wireless headphone configured to: receive, from the first wireless headphone, the link information associated with the first short-range wireless link; establish a second short-range wireless link with the audio source based on the link information; snoop the audio information over the first short-range wireless link using the second short-range wireless link; and in response to receiving the stop-snooping message, stop snooping the audio information over the first short-range wireless link using the second short-range wireless link, wherein the first wireless headphone continues receiving the audio information from the audio source prior to the establishment of the second short-range wireless link between the second wireless headphone and the audio source; and the first wireless headphone and the second wireless headphone use a same frequency-hopping (FH) table of the FHSS parameters in the link information. ### Claim 8 (depends on 7) The wireless audio system of claim 7, wherein: the first wireless headphone is further configured to: transmit, to the audio source, first microphone audio information over the first short-range wireless link; transmit, to the second wireless headphone, a switch message instructing the second wireless headphone to enable microphone audio information transmission; and disable microphone audio information transmission in response to the second wireless headphone enabling microphone audio information transmission; and the second wireless headphone is further configured to: receive, from the first wireless headphone, the switch message; enable microphone audio information transmission in response to receiving the switch message; and transmit, to the audio source, second microphone audio information over the second short-range wireless link. ### Claim 9 (depends on 7) The wireless audio system of claim 7, wherein each of the first and second short-range wireless links includes a synchronous connection oriented (SCO) link. ### Claim 10 (depends on 7) The wireless audio system of claim 7, wherein: the second wireless headphone is further configured to: transmit, to the first wireless headphone, a first message indicative of whether the audio information is successfully snooped by the second wireless headphone; and transmit, to the audio source, a second message determined based on whether the audio information is successfully snooped by the second wireless headphone; and the first wireless headphone is further configured to: receive, from the second wireless headphone, the first message; and transmit, to the audio source, a third message indicative of whether the audio information is successfully received by the first wireless headphone, a power of the third message adjusted based on the first message, wherein the second message and the third message determine whether the audio source can receive the third message correctly. ### Claim 11 (depends on 7) The wireless audio system of claim 7, wherein the first wireless headphone is further configured to repeatedly transmitting, to the audio source, a negative acknowledge (NACK) message to cause the audio source to re-transmit the audio information until a number of re-transmission reaches a threshold.