CN110312237B - Wireless earphone and communication method of wireless earphone - Google Patents
Wireless earphone and communication method of wireless earphone Download PDFInfo
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- CN110312237B CN110312237B CN201910603960.XA CN201910603960A CN110312237B CN 110312237 B CN110312237 B CN 110312237B CN 201910603960 A CN201910603960 A CN 201910603960A CN 110312237 B CN110312237 B CN 110312237B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1041—Mechanical or electronic switches, or control elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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Abstract
The present disclosure relates to a wireless headset and a communication method of the wireless headset. The wireless headset comprises a master headset and a slave headset which are both provided with Bluetooth communication means, wherein a Bluetooth link is established between the master headset and the other device, and related parameters of the master headset and the other device are transmitted to the slave headset so as to be intercepted by the slave headset. The master earphone and the slave earphone are also provided with WiFi communication components. The bluetooth communication means is configured to: the bluetooth data transmission is performed based on an alternating timing of first and second time periods, such that the bluetooth data received from the other device during the former first portion period is set for the second time period for transmitting the bluetooth data to the other device. The WiFi communication means is configured to: and performing at least partial data transmission between the master earphone and the slave earphone in a second partial time period in the first time period, wherein the first partial time period is earlier than the second partial time period and is not overlapped with the second partial time period. Therefore, the data transmission capacity between the master earphone and the slave earphone can be obviously improved, the interference between the Bluetooth and the WiFi transmission is reduced, the acquisition capacity of audio data is improved, and the reliability of a system comprising the wireless earphone is improved.
Description
Technical Field
The present disclosure relates to a headset and a communication method of the headset, and more particularly, to a wireless headset and a communication method of the wireless headset.
Background
With the social progress and the improvement of the living standard of people, the earphone becomes an indispensable living article for people. Traditional wired earphones are connected with intelligent equipment (such as a smart phone, a notebook computer, a tablet computer and the like) through wires, so that the actions of a wearer can be limited, and the traditional wired earphones are very inconvenient in sports occasions. Meanwhile, the winding and pulling of the earphone cord, as well as the stethoscope effect, all affect the user experience. The common Bluetooth headset cancels the connection between the headset and the intelligent device, but the connection still exists between the left ear and the right ear.
True wireless stereo headphones are produced at the same time. The current communication mode of the true wireless earphone is as follows: the intelligent device establishes a Bluetooth link with a master earphone in the true wireless earphone, firstly transmits data such as music, voice or other data packets to the master earphone in a Bluetooth communication mode, and then the master earphone forwards the received data to the slave earphone. In the wireless earphone and the communication method, the master earphone needs to transmit complete effective data with the communication equipment and the slave earphone respectively, the transmitted data volume is large, the reliability of Bluetooth transmission is low, the power consumption of the master earphone is large, and the endurance time of the wireless earphone is short.
Although a series of techniques have been introduced to reduce the amount of data transmitted by bluetooth between a master and a slave headset, for example, by the master headset transmitting parameters related to the bluetooth link with the smart device to the slave headset so that the slave headset listens to and directly receives bluetooth signals from the smart device without relying on the forwarding of bluetooth data by the master headset, there is still room for improvement between the speed of data transmission between the master and slave headsets and the actual requirements.
Disclosure of Invention
The present disclosure is provided to solve the above-mentioned problems occurring in the prior art.
There is a need for a wireless headset and a communication method of the wireless headset that can improve the ability of the wireless headset to acquire correct bluetooth audio data, and increase the reliability of the system including the wireless headset; further reducing retransmission of the Bluetooth audio data packet by another device; it is also possible to improve the data transmission speed between the master and slave earphones.
According to a first aspect of the present disclosure, there is provided a wireless headset comprising a master headset and a slave headset each provided with a bluetooth communication means, the master headset being configured to: and establishing a Bluetooth link with the other device by using a Bluetooth communication component arranged on the earphone, and transmitting relevant parameters of the Bluetooth link between the earphone and the other device to the slave earphone so that the slave earphone listens for and receives Bluetooth signals from the other device. The master earphone and the slave earphone are both provided with WiFi communication components. The bluetooth communication means may be configured to: the bluetooth data transmission is performed based on an alternating timing of a first period and a second period such that the bluetooth data from the other device is received within a first partial period within the first period, the second period being set for transmitting the bluetooth data to the other device. The WiFi communication means may be configured to: at least a portion of the data transmission between the master earphone and the slave earphone occurs during a second portion of the first time period, the first portion being earlier than and non-overlapping with the second portion.
According to a second aspect of the present disclosure, there is provided a communication method of a wireless headset, the wireless headset comprising a master headset and a slave headset, the master headset being configured to: and establishing a Bluetooth link with the other device, and transmitting relevant parameters of the Bluetooth link with the other device to the slave earphone so that the slave earphone listens for and receives Bluetooth signals from the other device. The communication method may include: performing a bluetooth data transmission based on an alternating timing of first and second time periods such that bluetooth data from the other device is received within a first portion of the time periods within the first time period; setting the second period of time for transmitting Bluetooth data to the other device; and performing WiFi data transmission between the master and slave headsets in a second partial period of the first time period, the first partial period being earlier than and non-overlapping with the second partial period.
By utilizing the various wireless earphones and the communication method thereof, at least part of data transmission between the master earphone and the slave earphone can be executed by utilizing a WiFi transmission mode, so that the data transmission capability between the master earphone and the slave earphone is obviously improved; by separate setting of the timing of the bluetooth transmission and the WiFi transmission, interference between each other can be reduced. Furthermore, the ability of the wireless headset to acquire correct Bluetooth audio data can be improved, and the reliability of the system including the wireless headset can be increased.
Drawings
In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments generally by way of example, and not by way of limitation, and together with the description and claims serve to explain the disclosed embodiments. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative and not intended to be exhaustive or exclusive embodiments of the present apparatus or method.
Fig. 1 shows a schematic configuration diagram of a wireless headset communicating with another device according to an embodiment of the present disclosure;
fig. 2 shows a diagram of a method of synchronizing a wireless headset with the smart device as an example of another device according to an embodiment of the present disclosure;
fig. 3(a) and 3(b) illustrate a structure diagram of a packet according to an embodiment of the present disclosure;
fig. 4 illustrates a block diagram of an acknowledge/negative acknowledge packet according to an embodiment of the present disclosure;
fig. 5 shows a flow chart of a communication method of a wireless headset according to an embodiment of the present disclosure;
fig. 6 shows a timing diagram of wireless communication between a master and a slave headset and between the master and the smart device according to an embodiment of the disclosure;
fig. 7 shows a timing diagram of wireless communication between a master and a slave headset and between the master and the smart device according to an embodiment of the disclosure;
fig. 8 shows a timing diagram of wireless communication between a master and slave earpiece and between the master and slave earpieces and a smart device according to an embodiment of the disclosure.
Detailed Description
For a better understanding of the technical aspects of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings. Embodiments of the present disclosure are described in further detail below with reference to the figures and the detailed description, but the present disclosure is not limited thereto.
Fig. 1 shows a schematic configuration of a wireless headset according to an embodiment of the present disclosure. As shown in fig. 1, the wireless headset 100 includes a master headset 101 and a slave headset 102, the master headset 101 is configured to establish a bluetooth link with another device 103 so as to perform bluetooth communication with the other device 103, wherein the master headset 101 can transmit related parameters of the bluetooth link, such as a bluetooth address of the other device 103, an encryption parameter of the bluetooth link between the master headset 101 and the other device 103, and other information to the slave headset 102 through wireless communication, so that the slave headset 102 listens for and receives a bluetooth signal from the other device 103, the bluetooth signal including a bluetooth audio data packet conveying audio information. The slave earphone 102 can "disguise" the master earphone 101 from bluetooth communication with the other device 103 by receiving the relevant parameters of the bluetooth link from the master earphone 101, i.e. the slave earphone 102 does not need to go through the process of establishing a bluetooth link with the other device 103 as the master earphone 101 does, but directly "disguise" the master earphone 101 from bluetooth communication with the other device 103 using the bluetooth link it established.
Thus, another device 103 configured to communicate with a single bluetooth device may transmit bluetooth audio packets directly to both the master 101 and slave 102 headsets, thereby improving the synchronization of the audio signals of both headsets as compared to the prior art where the slave headset 102 can only receive audio data frames forwarded from the master headset 102.
As shown in fig. 1, the master earphone 101 is provided with a bluetooth communication means 104 and a WiFi communication means 106, and the slave earphone 102 is also provided with a bluetooth communication means 105 and a WiFi communication means 107. WiFi is also called "mobile hotspot" (colloquially called "wireless broadband"), is a brand certificate of products made by Wi-Fi alliance manufacturers, and is a wireless local area network technology established in IEEE802.11 standard. The IEEE802.11 standards include IEEE802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, and the like. The technical terms "WIFI", "WIFI" and "WIFI" refer to consistent technical meanings throughout this disclosure.
The bluetooth communication means 104 or 105 may be configured to: performing bluetooth data transmission based on an alternating timing of first and second time periods such that bluetooth data, e.g., bluetooth audio data packets, from the other device 103 is received within a first portion of the first time period; and sets the second period for transmitting bluetooth data to the other device 103. In the present disclosure, "the alternating timing of the first period and the second period" covers various alternating occurrences of the first period and the second period, and an additional period may be inserted between the first period and the second period. For example, it may be 1 first period-1 second period-1 first period-1 second period … …, it may be a first period-b second periods-a first period-b second periods (a and b are natural numbers) … …, it may be 1 first period-1 other period-1 second period-1 first period-1 second period … …, and so on. Note that the second time period may be reserved for transmitting bluetooth data, e.g. an Acknowledgement (ACK) packet or a Negative Acknowledgement (NACK) packet, from the master 101 or slave 102 to the further device 103, but in practice no acknowledgement packet may be transmitted within some second time period, as appropriate (e.g. no correct bluetooth audio data is acquired).
The WiFi communication means 106 or 107 may be configured to: at least part of the data transmission between the master earphone 101 and the slave earphone 102 is performed in a second partial period of the first time period, the first partial period being earlier than and non-overlapping with the second partial period. Thus, at least part of the data transmission between the master earphone 101 and the slave earphone 102 can be performed by a WiFi mode, and compared with the typical transmission rate of several Mbps in the bluetooth mode, the data transmission rate in the WiFi mode can reach 300Mbps, thereby significantly improving the data transmission rate between the master earphone 101 and the slave earphone 102; moreover, by separating the Bluetooth data transmission and the WiFi data transmission on the time domain, the mutual interference between the Bluetooth data transmission and the WiFi data transmission is avoided, and thus the performances of the Bluetooth data transmission and the WiFi data transmission are improved.
In some embodiments, the WiFi communication component 106 or 107 may also be configured to: WiFi transmission is performed after a predetermined number of bluetooth clock cycles elapses from the beginning in the first period, so that WiFi transceiving between the master earphone 101 and the slave earphone 102 can be performed under the control of the unified bluetooth clock. An internal bluetooth clock may be provided in each of the bluetooth communication means 104 of the master earphone 101, the bluetooth communication means 105 of the slave earphone 102, and the bluetooth communication means (not shown) of the other device 103 so as to control the information transmission and reception of the corresponding bluetooth communication means. In some embodiments, the internal bluetooth clock may be implemented using a counter, and each bluetooth clock cycle, i.e., the resolution of the bluetooth clock, may be at least half the slot length. In some embodiments, the bluetooth clock period may be determined based on the symbol rate of the bluetooth data, e.g., where the symbol rate is 1M symbols/second, then each bluetooth clock period may be 1 μ s. With higher symbol rates, each bluetooth clock cycle may be less than 1 μ s. In some embodiments, the bluetooth communication means 104 of the master earpiece 101 may synchronize the internal bluetooth clock with the bluetooth communication means 105 of the slave earpiece 102, set the timing of WiFi data transmission (i.e., how many predetermined number of bluetooth clock cycles have elapsed since the start in the first time period before WiFi transmission) based on the synchronized bluetooth clock timing and transmit to the slave earpiece 102, the slave earpiece 102 may count the bluetooth clock cycles with its internal bluetooth clock, and wait until the predetermined number is counted, i.e., the WiFi communication means 107 is turned on to perform WiFi reception. In this way, the timing for the WiFi data transmission can be accurate to the bluetooth clock period, i.e. 1 μ s for example, without adding additional clock and control mechanisms, improving the performance of the WiFi transmission with lower cost and complexity.
In some embodiments, the process 200 shown in fig. 2 may be adopted to implement clock synchronization of the master earphone 101 and the slave earphone 102 with the other device 103, and synchronization of bluetooth clocks between the master earphone 101 and the slave earphone 102, thereby more precisely controlling the timing of data transmission between the three, including the timing of WiFi transmission time between the master earphone 102 and the slave earphone 102, so as to avoid overlapping of the WiFi transmission time and the bluetooth transmission time and interference caused thereby. Furthermore, by letting the slave earphone 102 listen to a bluetooth signal from the other device 103, synchronization of audio data between the master earphone 101 and the slave earphone 102 may be further ensured, thereby improving sound quality, such as but not limited to stereo effect.
In some embodiments, the other device may include any one of a cellular phone, a mobile PC, a tablet, a portable smart assistant, a smart wearable apparatus.
As shown in fig. 2, a wireless headset comprising a master-slave headset receives a radio frequency signal from another device (not shown) by using a radio frequency front end 201, samples the received radio frequency signal by using an analog-to-digital converter 202 to obtain a digital signal, and processes the digital signal by using a synchronization and demodulation module 203 to obtain a timing synchronization error 204 and a carrier synchronization error 205. Either or both of the timing synchronization error 204 and the carrier synchronization error 205 may be fed to the phase locked loop 206 to adjust the crystal oscillation frequency of the earpiece chip of the wireless earpiece using the phase locked loop 206, e.g., feeding the radio frequency carrier from the phase locked loop 206 to the radio frequency front end 201 and the frequency divider 207, and adjusting the analog-to-digital sampling clock of the analog-to-digital converter 202 via the frequency divider 207, etc., so that the wireless earpiece can be co-frequency in clock frequency with another device. And, the timing synchronization signal is synchronized with the start of the time slot of the bluetooth transmission signal of the other device, so that the wireless headset including the master and slave headsets achieves clock synchronization with the other device.
Returning to fig. 1, the bluetooth communication means 104 and 105 may be configured to establish a bluetooth link between the master earphone 101 and the slave earphone 102, which may be utilized to transmit parameters related to a WiFi connection by a WiFi transmitter to a WiFi receiver, the parameters related to the WiFi connection including a WiFi frequency point and a timing of the WiFi transmission characterized by a bluetooth clock. As shown in fig. 1, the WiFi communication means 106 may include a WiFi transmitter 1061 and a WiFi receiver 1062, and the WiFi communication means 107 may include a WiFi transmitter 1071 and a WiFi receiver 1072. Through bluetooth transmission, the WiFi receiver 1062 and the WiFi receiver 1072 can know the time domain position of WiFi transmission and reception (based on the bluetooth clock and the precision can reach at least 1 μ s), so it is not necessary to start and scan regularly to detect whether there is WiFi data transmission like a normal WiFi receiver, thereby saving time, reducing power consumption, and also avoiding loss of WiFi data transmission. In some embodiments, WiFi communication means 106 (including WiFi transmitter 1061 and WiFi receiver 1062) and/or WiFi communication means 107 (including WiFi transmitter 1071 and WiFi receiver 1072) may be enabled based on the timing of received WiFi transmissions characterized by a bluetooth clock. Not only can the WiFi receiver 1062 and the WiFi receiver 1072 be turned on when needed, but the WiFi transmitter 1061 and the WiFi transmitter 1071 can also be turned on only when needed, so that the normal operation time of each WiFi communication means 106 and 107 is significantly reduced, thereby greatly reducing power consumption. Letting the WiFi communication component 106 and/or the WiFi communication component 107 know the time domain location of WiFi transceiving (which can be accurate to at least 1 μ s), also makes WiFi transmission easier to synchronize, further improving the transceiving performance of WiFi. Therefore, the receiving and sending time sequences of the Bluetooth transmission and the WiFi transmission are arranged in a unified coordination mode, the mutual interference of the Bluetooth transmission and the WiFi transmission is obviously reduced, the problem of coexistence of the two transmission modes is solved, and the performance of a dual-mode (Bluetooth and WiFi) compatible system is greatly improved.
In some embodiments, the parameters related to the WiFi connection may be transmitted using a bluetooth link, or may be implemented via WiFi transmission using the WiFi communication means 106 and the WiFi communication means 107. In some embodiments, the parameters associated with the bluetooth link may be transmitted using the bluetooth link, or may be implemented via WiFi transmission using the WiFi communication component 106 and the WiFi communication component 107. The respective time periods may be preset to enable transmission of the relevant parameters before the alternating timing of the first time periods and the second time periods, so as to establish the respective wireless links between the master earphone 101 and the slave earphone 102 by using the relevant parameters. In the case of transmitting the relevant parameters of the bluetooth link via the WiFi manner, the bluetooth link between the master earphone 101 and the slave earphone 102 may not be established, so as to further avoid the interference of the bluetooth transmission between the two to the WiFi transmission.
The expressions "first period" and "second period" throughout this disclosure may be generally referred to as frames (bluetooth frames) as well, each period may have a preset number of slots, and transmission and reception of corresponding information may be performed in each period. In some embodiments, each time segment may occupy the time of one or several time slots. According to the bluetooth protocol, the time of one slot is 625 μ s. When the advanced audio distribution framework protocol (A2DP) is adopted, one Bluetooth frame can often occupy a plurality of time slots; whereas when the hands-free frame protocol (HFP) is adopted, it generally occupies one slot. In some embodiments, the first time period may occupy, for example, 1, 3, or 5 time slots, and the transceiving of the respective bluetooth packets may start at the start position of the time slot. Taking the example of the first time period occupying a single time slot and the second time period occupying a single time slot, the other device 103 may transmit bluetooth packets to the master earphone 101 at 1 st, 3 rd, 5 th, and 7 … … th time slots, and accordingly, the slave earphone 102 listens for bluetooth packets from the other device 103 at 1 st, 3 th, 5 th, and 7 … … th time slots, and the other device 103 receives bluetooth packets from the master earphone 101/slave earphone 102 at 2 nd, 4 th, 6 th, and 8 … … th time slots. Further taking the example that the first time period occupies 3 time slots and the second time period occupies a single time slot, the other device 103 may transmit bluetooth packets to the master earphone 101 at 1 st, 5 th, 9 th, 13 … … th time slots, accordingly, the slave earphone 102 listens for bluetooth packets from the other device 103 at 1 st, 5 th, 9 th, 13 … … th time slots, and the other device 103 may receive bluetooth packets from the master earphone 101/slave earphone 102 at 4 th, 8 th, 12 th, 16 … … th time slots.
In some embodiments, the bluetooth packets sent by the other device 103 to the master earphone 101/slave earphone 102 in the first time period are typically audio data packets, while the bluetooth packets sent by the master earphone 101/slave earphone 102 to the other device 103 in the second time period are typically acknowledgement packets (ACK packets or NACK packets), the former having a significantly larger data amount than the latter, and yet reserving time for WiFi transmission between the master earphone 101 and slave earphone 102 in the first time period, and the WiFi transmission data may include various forms of correction packets (ECC packets, correct audio data packets), indication packets, and so on. The number of time slots occupied by the first time period and the second time period, respectively, may be reasonably configured based on the above considerations, thereby ensuring efficient transmission of data while reducing idle time slots. For example, the first and second time periods may be set to occupy different numbers of time slots, such as the first time period may be made to occupy a greater number of time slots than the second time period. For example, the second period may be set to occupy 1 slot.
The structure of a bluetooth packet (packet) according to an embodiment of the present disclosure is explained below with reference to fig. 3(a) and 3 (b). There are two data transmission rates for wireless transmission, one being a base rate and the other being an enhanced rate. Packet format for basic rate as shown in fig. 3(a), a bluetooth packet may include 3 fields, which are an access code 301, a packet header 302, and a payload 303, respectively, in a direction from least significant bit to most significant bit, where: the access code 301 is a flag of the same piconet (piconet) for timing synchronization, offset compensation, paging, and inquiry; the header 302 contains information for radio link control; the payload 303 carries valid information, which in this disclosure may be audio data (audio data packets), error correction codes (ECC packets), blanks (e.g., simple ACK/NACK packets), and the like. The technical term "audio data packet" used herein means that the payload 303 corresponds to audio data after the access code 301, the header 302, and the like are removed from the bluetooth packet. Enhanced rate packet format as shown in fig. 3(b), the bluetooth packet may include 6 fields, which are, in the direction from least significant bit to most significant bit, an access code 303, a header 305, a guard interval 306, a sync 307, an enhanced rate payload 308, and a trailer 309, wherein the access code 303, the header 305, and the enhanced rate payload 308 are similar to the access code 301, the header 302, and the payload 303 in fig. 3(a), and are not described herein. The guard interval 306 represents an interval time between the header 305 and the sync 307; the synchronization 307 comprises a synchronization sequence, typically used for differential phase shift keying modulation; the packet tail 309 is set differently for different modulation schemes. In some embodiments, for synchronized data, at the end of payload 303 and enhanced rate payload 308, there may also be, for example, 16 bits for cyclic redundancy check.
The error correction code contained in the ECC packet described herein is an error correction code for the audio data in the payload 303 and the enhanced rate payload 308, and may be encoded in various manners including, but not limited to, Reed Solomon (RS) encoding, BCH (Bose, Ray-Chaudhuri, and Hocquenghem) encoding, and the like. After the original audio data is encoded (e.g., RS encoded), the audio data (e.g., encoded audio data) and the error correction code can be obtained. After partial bit errors occur in the audio data received from another device, the original audio data can still be recovered through the decoding process of the error correction code. The error correction codes in the ECC packets do not include audio data and are significantly less in data size than the original audio data.
In some embodiments, in the event that either of the master and slave headsets receives a bluetooth audio data packet from the other device, it may send a corresponding packet to the other headset. When the earphone correctly receives the bluetooth audio data packet, channel coding may be performed on the bluetooth audio data packet, and the original audio data obtained after coding is added with an error correction code, while a corresponding packet sent to another earphone only contains the error correction code (which may be referred to as an ECC packet) but not the audio data. In case the audio data packet received by the other headphone from the other device is erroneous, then channel decoding may be performed with the error correction code based on the erroneous audio data, so as to implement error correction, resulting in correct audio data.
In some embodiments, a packet containing the received bluetooth audio data (which may be referred to as a bluetooth audio packet) may also be sent in the event that the bluetooth audio packet is correctly received by the headset, for example, but not limited to, in the event that error correction code in another headset-enabled ECC packet still fails to achieve error correction, the bluetooth audio packet may be reissued to ensure successful error correction. In the case where the either one of the master and slave headsets receives a bluetooth audio data packet from the other device, but the received bluetooth audio data packet is in error, the corresponding packet may be implemented as an indication packet which may indicate that the either headset did not correctly receive the bluetooth audio data packet from the other device and does not contain an error correction code. In some embodiments, such an indication packet not containing an error correction code may also be referred to as an ECC packet and adopts the structure of an ECC packet, except that the payload contains a corresponding indication but does not contain an error correction code.
In some embodiments, when audio data received by either of the master and slave headsets has a partial bit error, it is possible that correct audio data may be available through the decoding process using an error correction code transmitted by the other. The data volume of the error correcting code transmitted between the master earphone and the slave earphone can be obviously smaller than that of the original audio data, and the error bits in the audio data of the receiving party can be corrected, so that the data retransmission of another device is reduced, and the system performance is improved. In some embodiments, the ECC is packed in layers above the physical layer, and the layers such as the wireless medium access control (mac) layer, the wireless host control interface layer, etc. multiplex the wireless protocol, and a 2Mb/s symbol rate can be used in the physical layer, and the modulation method can be Quadrature Phase Shift Keying (QPSK) or Gaussian Frequency Shift Keying (GFSK). The wireless physical layer can adopt a symbol rate of 1Mb/s, and the ECC packet adopts a higher symbol rate, so that more error correction bits can be transmitted and the error correction capability can be better.
In some embodiments, the extended format ACK/NACK packet described in this disclosure may be implemented using a structure as shown in fig. 4, including access code 400, header and payload 407 fields. Wherein, in the direction from the least significant bit to the most significant bit, the packet header sequentially comprises the following fields: logical transport address 401, type 402, traffic 403, acknowledgement indicator 404, sequential numbering method 404, and header error control 406, where acknowledgement indicator 404 is a bit, which is a 1 indicating that it is an ACK packet, and a 0 indicating that it is a NACK packet. In addition to the ACK/NACK acknowledgement, the extended format ACK/NACK packet may utilize the payload 407 field to carry more information, such as whether a correction packet is enabled, whether the correction packet is an ECC packet or an audio data packet, and so on.
Fig. 5 shows a flowchart of a communication method of a wireless headset according to an embodiment of the present disclosure, the wireless headset including a master headset and a slave headset, the master headset being configured to establish a bluetooth link with another device to perform bluetooth communication with the other device and transmit relevant parameters of the bluetooth link between the master headset and the other device to the slave headset, so that the slave headset listens for and receives a bluetooth signal from the other device. As shown in fig. 5, the communication method 500 may begin with a bluetooth data transmission based on an alternating timing of a first time period and a second time period such that bluetooth data from the other device is received during a first portion of the first time period (step 501). Whereby a period can be reserved for non-bluetooth data transmission in a portion of the first period other than the first partial period. In step 502, the second time period is set for transmitting bluetooth data to the other device. The second time period is reserved for transmitting bluetooth data from the master and slave headsets to the other device, and in practical cases, ACK/NACK packets may be transmitted or no information may be sent in a certain second time period.
Then, WiFi data transmission between the master and slave headsets is performed during a second partial period of the first time period, the first partial period being earlier than and non-overlapping with the second partial period (step 503). Therefore, at least part of data transmission between the master earphone and the slave earphone can be executed by a WiFi mode, and compared with the common transmission rate of a plurality of Mbps in a Bluetooth mode, the data transmission rate of the WiFi mode can reach 300Mbps, so that the data transmission rate between the master earphone and the slave earphone is obviously improved; moreover, by separating the Bluetooth data transmission and the WiFi data transmission on the time domain, the mutual interference between the Bluetooth data transmission and the WiFi data transmission is avoided, and thus the performances of the Bluetooth data transmission and the WiFi data transmission are improved.
In some embodiments, the communication method 500 may further include: the WiFi transmission is performed after a predetermined number of bluetooth clock cycles elapses from the beginning in the first period. Therefore, WiFi transceiving between the master earphone and the slave earphone can be carried out under the control of the uniform Bluetooth clock, and the timing of the WiFi transceiving can be accurate to the period of the Bluetooth clock, for example 1 mu s.
In some embodiments, the communication method 500 may further include: and transmitting relevant parameters of WiFi connection from one of the master earphone and the slave earphone to the other by using a Bluetooth link, wherein the relevant parameters of the WiFi connection comprise a WiFi frequency point and the timing of WiFi transmission represented by a Bluetooth clock. Therefore, the other party can not only know the relevant parameters required by the establishment of the WiFi wireless connection and further realize the establishment of the WiFi link, but also know the timing of WiFi transmission reaching the accuracy of the Bluetooth clock period, so that the WiFi communication component can be pertinently started on the basis, therefore, the WiFi is easier to synchronize, the transceiving performance of the WiFi is improved, continuous scanning of the WiFi receiver and continuous starting of the WiFi transmitter are avoided, the normal working time of the WiFi communication component is obviously reduced, and the power consumption is greatly reduced.
The bluetooth-WiFi composite communication according to the above description may be implemented in different modes in different application scenarios. The wireless headset of the various embodiments of the present disclosure and the communication method thereof are explained in detail in various modes as follows.
Fig. 6 and 7 show timing diagrams of wireless communication between a master and a slave headset and between the master and the smart device according to an embodiment of the disclosure.
As shown in fig. 6, for the nth first time period (N is a natural number), when the first earphone of the master earphone and the slave earphone correctly receives the audio data packet from the other device (for example, in the first partial period), the correction packet may be transmitted to the second earphone of the master earphone and the slave earphone in the WiFi communication manner by using the WiFi communication means in the first partial period in the second partial period of the nth first time period. In various embodiments of the present disclosure, the correction packet may adopt various formats, for example, an ECC packet may be included in the payload, instead of the audio data, the ECC packet may include an error correction code obtained by performing channel coding or the like on the bluetooth audio data received by the first headset, or a bluetooth audio data packet may be included in the payload, the bluetooth audio data received by the first headset. In some embodiments, the correction packets may also optionally take different formats in different first time periods, for example, in a first sub-portion of a second part period of an nth first time period, the first headphone may send an ECC packet, and if the second headphone still cannot complete error correction (cannot acquire correct audio data) using the ECC packet, the first headphone may send an audio data packet in the first sub-portion of the second part period of an N +1 th first time period to ensure that the second headphone can acquire correct audio data.
As shown in fig. 7, for the nth first time period, in the case where the first headset does not correctly receive the audio data packet from the other device, the first headset may transmit a negative acknowledgement indication packet to the second headset in the WiFi communication manner using the WiFi communication member in the second sub-portion of the second partial period, the negative acknowledgement indication packet indicating that the first headset does not correctly receive the audio data packet. In some embodiments, the first sub-portion and the second sub-portion may coincide, or partially coincide, e.g., a front portion of the first sub-portion may serve as the second sub-portion.
For the nth first time period, in the case where the correction packet from the first headset is correctly received by the second headset (as shown in fig. 6), and the audio data packet from the other device is correctly received or the error correction of the received audio data packet is completed by using the correction packet, an acknowledgement indication packet may be transmitted to the first headset in a WiFi communication manner by using the WiFi communication means within a third sub-section within the second partial time period, the acknowledgement indication packet indicating that the second headset acquires correct audio data. The first subsection and the third subsection may be paired and do not overlap. For the nth first time period, the second headset may transmit the correction packet to the first headset in WiFi communication using the WiFi communication means in a fourth subsection of the second partial period, if the correction packet is not received (or, for example, a negative acknowledgement indication packet is received, as shown in fig. 7), and the audio data packet from the other device is correctly received. The second subsection and the fourth subsection may be paired and do not overlap. In some embodiments, the first sub-portion may be earlier than the fourth sub-portion and the two do not overlap, the first sub-portion may be earlier than the third sub-portion, and the second sub-portion may be earlier than the fourth sub-portion. The second headset may transmit the correction packet to the first headset in the WiFi communication manner using the WiFi communication means directly within the fourth subsection, regardless of whether the first headset correctly receives the audio data packet from the other device, in the case where the audio data packet from the other device is correctly received by the second headset. By the sequential non-overlapping arrangement of the potentially co-existing response subsections in the time domain, mutual interference of WiFi data transmissions between the first and second headsets can be further reduced.
In some embodiments, in the case that the first headset acquires correct audio data in the nth first time period (for example, a bluetooth audio data packet is correctly received directly from another device, as shown in fig. 6, or a correction packet from the second headset is used to successfully correct the received bluetooth audio data packet), and receives the acknowledgement indication packet (as shown in fig. 6) or the correction packet (as shown in fig. 7) from the second headset, the first headset may transmit a confirmation response packet to the another device in a bluetooth communication manner by using the bluetooth communication means in the nth second time period, and otherwise transmit a negative acknowledgement packet or no response packet to the another device in the bluetooth communication manner by using the bluetooth communication means.
In some embodiments, the response packet to the other device may also be sent by the second headset. For example, in the case where the second headset acquires correct audio data in the nth first time period (for example, correctly receives a bluetooth audio data packet directly from another device, as shown in fig. 8, or successfully corrects the received bluetooth audio data packet with a correction packet from the first headset) and receives the correction packet from the first headset, an acknowledgement packet may be bluetooth-transmitted to the another device by the second headset in the nth second time period, and otherwise a negative acknowledgement packet or no acknowledgement packet may be bluetooth-transmitted to the another device. In view of receiving the correction packet from the first earphone, the second earphone can know that the first earphone has correctly received the bluetooth audio data packet from another device, and if the second earphone also obtains correct audio data, the second earphone can know that the master earphone and the slave earphone both obtain correct bluetooth audio data, so that an indication packet does not need to be sent to the first earphone or the correction packet needs to be sent to another device by the first earphone, but the second earphone can directly send the ACK packet to another device, thereby simplifying and accelerating the communication process.
In some embodiments, the first earphone and the second earphone may be dynamically selected according to actual requirements, or may be preset. The number of time slots occupied by the first time period and the second time period can be dynamically adjusted, thereby ensuring efficient transmission of data while reducing idle time slots.
Moreover, although exemplary embodiments have been described herein, the scope thereof includes any and all embodiments based on the present disclosure with equivalent elements, modifications, omissions, combinations (e.g., of various embodiments across), adaptations or alterations. The elements of the claims are to be interpreted broadly based on the language employed in the claims and not limited to examples described in the present specification or during the prosecution of the application, which examples are to be construed as non-exclusive. It is intended, therefore, that the specification and examples be considered as exemplary only, with a true scope and spirit being indicated by the following claims and their full scope of equivalents.
The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more versions thereof) may be used in combination with each other. For example, other embodiments may be used by those of ordinary skill in the art upon reading the above description. In addition, in the foregoing detailed description, various features may be grouped together to streamline the disclosure. This should not be interpreted as an intention that a disclosed feature not claimed is essential to any claim. Rather, inventive subject matter may lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations. The scope of the invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.
Claims (17)
1. A wireless headset comprising a master headset and a slave headset, each provided with a Bluetooth communication member,
the primary earpiece is configured to: establishing a Bluetooth link between the Bluetooth communication component arranged on the master earphone and another device, and transmitting related parameters of the Bluetooth link between the master earphone and the another device to the slave earphone so that the slave earphone can monitor and receive Bluetooth signals from the another device, wherein the master earphone and the slave earphone are both provided with WiFi communication components;
the bluetooth communication means is configured to:
performing a Bluetooth data transmission based on an alternating timing of first and second periods of time such that Bluetooth data from the other device is received during a first portion of the periods within the first period of time,
setting the second period of time for transmitting Bluetooth data to the other device;
the WiFi communication means is configured to:
performing at least partial WiFi transmission between the master earpiece and a slave earpiece for a second partial period of the first time period, the first partial period being earlier than and non-overlapping with the second partial period;
a first earphone of the master and slave earphones is configured to, for an nth first time period:
transmitting a correction packet to a second one of the master and slave earpieces with the WiFi communication member for a first sub-portion of the second partial period if the audio data packet from the other device is correctly received;
transmitting a negative indication packet to the second headset with the WiFi communication member within a second sub-portion of the second portion period, the negative indication packet indicating that the first headset did not properly receive audio data packets, in the event that audio data packets from the other device were not properly received,
the second headset transmitting the correction packet to the first headset using the WiFi communication member for a fourth sub-portion of the second portion of the period if the correction packet is not received or the negative acknowledgement indication packet is received and the audio data packet from the other device is correctly received;
wherein N is a natural number.
2. The wireless headset of claim 1, wherein the WiFi communication means is further configured to: the WiFi transmission is performed after a predetermined number of bluetooth clock cycles elapses from the beginning in the first period.
3. The wireless headset of claim 1, wherein one of the master headset and the slave headset is further configured to: and establishing a Bluetooth link with the other party by using the Bluetooth communication component, and transmitting related parameters of WiFi connection to the other party by using the Bluetooth link, wherein the related parameters of the WiFi connection comprise a WiFi frequency point and timing of WiFi transmission represented by a Bluetooth clock.
4. The wireless headset of claim 3, wherein the other party is further configured to: the WiFi communication means thereon is enabled based on the timing of the received WiFi transmission characterized by the bluetooth clock.
5. The wireless headset of claim 1, wherein the second headset is further configured to, for the nth first time period:
transmitting an acknowledgement indication packet to the first headset with the WiFi communication means within a third subsection of the second part period, the acknowledgement indication packet indicating that the second headset acquired correct audio data, in case the correction packet was received correctly and the audio data packet from the other device was received correctly or error correction of the received audio data packet was completed with the correction packet,
wherein the first sub-portion and the third sub-portion are paired and do not overlap with each other, and the second sub-portion and the fourth sub-portion are paired and do not overlap with each other.
6. The wireless headset of claim 5, wherein the first sub-portion is earlier than the fourth sub-portion and the first sub-portion is earlier than the third sub-portion and the second sub-portion is earlier than the fourth sub-portion without overlapping.
7. The wireless headset of claim 1, wherein the first headset is further configured to: and under the condition that correct audio data are obtained in the Nth first time period and a confirmation indication packet or a correction packet is received from the second earphone, transmitting a confirmation response packet to the other device by using the Bluetooth communication member in the Nth second time period, or else, transmitting a negative confirmation response packet or not transmitting a response packet to the other device by using the Bluetooth communication member.
8. The wireless headset of claim 1, wherein the second headset is configured to: and under the condition that correct audio data are obtained in the Nth first time period and the correction packet is received from the first earphone, transmitting a confirmation response packet to the other device by using the Bluetooth communication member in the Nth second time period, and otherwise, transmitting a negative confirmation response packet or not transmitting a response packet to the other device by using the Bluetooth communication member.
9. The wireless headset of claim 1, wherein the first time period and the second time period occupy different numbers of time slots.
10. A communication method of a wireless headset, the wireless headset comprising a master headset and a slave headset, the master headset configured to: establishing a bluetooth link with another device and transmitting parameters related to the bluetooth link with the other device to the slave headset so that the slave headset listens for and receives bluetooth signals from the other device, wherein the communication method comprises:
performing a bluetooth data transmission based on an alternating timing of first and second time periods such that bluetooth data from the other device is received within a first portion of the time periods within the first time period;
setting the second period of time for transmitting bluetooth data to the other device; and
performing WiFi data transmission between the master earphone and the slave earphone in a second partial period in the first time period, wherein the first partial period is earlier than the second partial period and does not overlap with the second partial period;
for the nth first time period:
in the event that a first one of the master and slave earpieces correctly receives an audio data packet from the other device, WiFi transmitting, by the first earpiece, a correction packet to a second one of the master and slave earpieces within a first subportion of the second subportion period;
in the event that the first earpiece does not correctly receive the audio data packet from the other device, WiFi transmitting, by the first earpiece, a negative indication packet to the second earpiece for a second subsection of the second fractional period, the negative indication packet indicating that the first earpiece did not correctly receive the audio data packet,
transmitting a correction packet to the first headset with the WiFi communication means within a fourth sub-portion of the second portion of the period if the second headset receives no correction packet or the negative acknowledgement indication packet and correctly receives an audio data packet from the other device;
wherein N is a natural number.
11. The communication method according to claim 10, further comprising: the WiFi transmission is performed after a predetermined number of bluetooth clocks have elapsed since the start in the first period.
12. The communication method according to claim 10, further comprising: and transmitting relevant parameters of WiFi connection to the other party from one of the master earphone and the slave earphone by using a Bluetooth link, wherein the relevant parameters of the WiFi connection comprise a WiFi frequency point and the timing of WiFi transmission represented by a Bluetooth clock.
13. The communication method according to claim 12, further comprising: enabling the WiFi communication means of the other party based on the timing of the received WiFi transmission characterized by the Bluetooth clock.
14. The communication method according to claim 10, further comprising, for the nth first period:
transmitting, by the second headset to the first headset WiFi, an acknowledgement indication packet within a third sub-portion of the second portion of the time period, the acknowledgement indication packet indicating that the second headset acquired correct audio data, in the event that the second headset correctly received the correction packet and correctly received the audio data packet from the other device or error correction of the received audio data packet is completed with the correction packet,
wherein the first sub-portion and the third sub-portion are paired and do not overlap with each other, and the second sub-portion and the fourth sub-portion are paired and do not overlap with each other.
15. The communication method according to claim 10, further comprising: and transmitting a confirmation response packet to the other device in the nth second time period by the first earphone under the condition that the first earphone acquires correct audio data in the nth first time period and receives a confirmation indication packet or a correction packet from the second earphone, otherwise transmitting a non-confirmation response packet or not transmitting a response packet to the other device in the bluetooth.
16. The communication method according to claim 10, further comprising: and under the condition that the second earphone acquires correct audio data in the Nth first time period and receives the correction packet from the first earphone, the second earphone transmits a confirmation response packet to the other equipment in the Nth second time period, otherwise, the second earphone transmits a negative confirmation response packet or does not transmit a response packet to the other equipment in the Bluetooth.
17. The communication method according to claim 10, wherein the number of time slots occupied by the first time period and the second time period is dynamically adjustable.
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| CN110944311B (en) * | 2019-11-06 | 2023-07-28 | 泰凌微电子(上海)股份有限公司 | Method for distributing time slot of wireless earphone and wireless earphone adopting same |
| CN110995326B (en) * | 2019-12-23 | 2022-04-15 | 无锡中感微电子股份有限公司 | Communication method of wireless earphone, wireless earphone and wireless earplug |
| CN111132377B (en) * | 2019-12-27 | 2022-03-22 | 昱兆微电子科技(上海)有限公司 | Data transmission method and system for terminal and earphone |
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