CN110719651A - Data transmission method and device - Google Patents
Data transmission method and device Download PDFInfo
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- CN110719651A CN110719651A CN201911243026.8A CN201911243026A CN110719651A CN 110719651 A CN110719651 A CN 110719651A CN 201911243026 A CN201911243026 A CN 201911243026A CN 110719651 A CN110719651 A CN 110719651A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/22—Arrangements affording multiple use of the transmission path using time-division multiplexing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/80—Responding to QoS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
- H04M1/6041—Portable telephones adapted for handsfree use
- H04M1/6058—Portable telephones adapted for handsfree use involving the use of a headset accessory device connected to the portable telephone
- H04M1/6066—Portable telephones adapted for handsfree use involving the use of a headset accessory device connected to the portable telephone including a wireless connection
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
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Abstract
The embodiment of the invention provides a data transmission method and a device, wherein the method comprises the following steps: the first device receives a data packet in a first time slot, wherein the data packet is noise or a data packet received from the data source device; the first equipment determines a link state between the data source equipment and the first equipment according to the data packet, wherein the link state is an idle state or a busy state; and when the first device determines that the link state is an idle state, sending audio data to the second device in the first time slot, wherein the audio data is the audio data received by the first device from the data source device. The method and the device are used for improving the communication efficiency of the first device and the data source device and the transmission efficiency of the first device for transmitting the audio data to the second device.
Description
Technical Field
The embodiment of the invention relates to the field of wireless communication, in particular to a data transmission method and device.
Background
An electronic device (e.g., a cell phone, a computer, etc.) may typically connect to at least one headset and send audio packets to the at least one headset. The at least one earpiece may convert the audio packets into audio that is audible to the user such that the user may hear the audio while wearing the earpiece.
In the related art, after determining a master earphone among at least one earphone, an electronic device transmits an audio packet to the master earphone, and after the master earphone receives the audio packet, the master earphone transmits the audio packet to a slave earphone. In the above process, when the master earphone sends an audio packet to the slave earphone, the master earphone cannot receive another audio packet sent by the electronic device to the master earphone, so that the master earphone needs to waste the normal communication time with the electronic device, and sends the audio packet to the slave earphone, thereby reducing the communication efficiency of the master earphone and the electronic device.
Disclosure of Invention
Embodiments of the present invention provide a data transmission method and apparatus, which are used to improve communication efficiency of a first device and a data source device, and transmission efficiency of sending audio data from the first device to a second device.
In a first aspect, an embodiment of the present invention provides a data transmission method, which is applied to a first device in an audio device group, where the first device is wirelessly connected to a data source device and a second device, and the second device is a device in the audio device group except the first device, where the method includes:
the first device receives a data packet in a first time slot, wherein the data packet is noise or a data packet received from the data source device;
the first equipment determines a link state between the data source equipment and the first equipment according to the data packet, wherein the link state is an idle state or a busy state;
and when the first device determines that the link state is an idle state, sending audio data to the second device in the first time slot, wherein the audio data is the audio data received by the first device from the data source device.
In one possible design, the determining, by the first device, the link status between the data source device and the first device according to the data packet includes:
the first equipment judges whether the data packet comprises synchronization information and a packet header;
if not, the first device determines that the link state is an idle state;
if so, the first device determines the link state according to the header of the data packet and/or whether the data packet includes a load.
In another possible design, the determining, by the first device, the link status according to whether a header of the data packet and/or a payload is included in the data packet includes:
the first equipment acquires first synchronization information in the data packet;
the first equipment acquires the correlation degree of the first synchronization information and the preset synchronization information;
and the first equipment determines the link state according to the correlation.
In another possible design, the determining, by the first device, the link status according to the correlation includes:
if the correlation degree is smaller than a first threshold value, the first equipment determines that the link state is the idle state;
and if the correlation degree is determined to be greater than or equal to the first threshold, the first device determines the link state according to a verification result of verifying the packet header.
In another possible design, the determining, by the first device, the link status according to a verification result of verifying the packet header includes:
the first device obtains first verification information and second information in the packet header, wherein the second information is information except the first verification information in the packet header;
the first equipment generates second check-up information according to the second information;
if the first check information is different from the second check information, the first device determines that the link state is an idle state;
if the first check information is the same as the second check information, the first device determines the link status according to the type of the data packet in the packet header and/or whether the data packet includes a load.
In another possible design, the determining, by the first device, the link status according to a packet type in the packet header and/or whether a load is included in the packet includes determining, by the first device, that the link status includes:
if the type of the data packet is a first type or the data packet does not include a load, the first device determines that the link state is an idle state, and the first type is used for indicating that the data packet does not include a load;
if the type of the data packet is a second type, or the data packet includes a load, the first device determines that the link state is a busy state.
In another possible design, the transmitting, by the first device, audio data to be transmitted to the second device in the first time slot includes:
the first equipment carries out modulation processing on the audio data through a preset modulation mode and a preset physical bandwidth to obtain modulation data;
the first device determines the audio packet according to the modulation data, wherein the audio packet comprises the modulation data and a packet header;
the first device sends the audio packet to the second device.
In another possible design, the transmitting, by the first device, audio data to be transmitted to the second device in the first time slot includes:
the first equipment sends the identification of the current data frame to the second equipment;
the first device receives interception information sent by the second device, where the interception information is used to indicate a receiving state of the second device for N data frames, where the N data frames include the current data frame and N-1 data frames located before and closest to the current data frame, the receiving state is a receiving success or a receiving failure, and N is an integer greater than or equal to 1;
the first equipment determines data frames which are not listened by the second equipment according to the interception information;
the first device sends data frames to the second device that are not heard by the second device.
In another possible design, before the first device sends the identifier of the current data frame to the second device, the method further includes:
and the first equipment sends link information between the first equipment and the data source equipment to the second equipment, wherein the link information is used for establishing a first bidirectional link between the second equipment and the data source equipment.
In another possible design, after the second device fails to listen to the data packet sent by the data source device to the first device in the first time slot, the state of the second device is a receiving state.
In another possible design, the wireless connection is a bluetooth connection.
In another possible design, the preset modulation mode is quadrature phase shift keying or eight phase shift keying, the preset physical bandwidth is 2 mhz, and the physical rate is 4 mbit/s or 6 mbit/s.
In a second aspect, an embodiment of the present invention provides a data transmission apparatus, which is applied to a first device in an audio device group, where the first device is wirelessly connected to a data source device and a second device, and the second device is a device in the audio device group except the first device, where the apparatus includes: a receiving module, a determining module and a sending module, wherein,
the receiving module is configured to receive a data packet in a first time slot, where the data packet is noise or a data packet received from the data source device;
the determining module is configured to determine, by the first device according to the data packet, a link state between the data source device and the first device, where the link state is an idle state or a busy state;
the sending module is configured to send, when the first device determines that the link status is an idle status, audio data to the second device in the first time slot, where the audio data is audio data received by the first device from the data source device.
In one possible design, the determining module is specifically configured to:
the first equipment judges whether the data packet comprises synchronization information and a packet header;
if not, the first device determines that the link state is an idle state;
if so, the first device determines the link state according to the header of the data packet and/or whether the data packet includes a load.
In another possible design, the determining module is specifically configured to:
the first equipment acquires first synchronization information in the data packet;
the first equipment acquires the correlation degree of the first synchronization information and the preset synchronization information;
and the first equipment determines the link state according to the correlation.
In another possible design, the determining module is specifically configured to:
if the correlation degree is smaller than a first threshold value, the first equipment determines that the link state is the idle state;
and if the correlation degree is determined to be greater than or equal to the first threshold, the first device determines the link state according to a verification result of verifying the packet header.
In another possible design, the determining module is specifically configured to:
the first device obtains first verification information and second information in the packet header, wherein the second information is information except the first verification information in the packet header;
the first equipment generates second check-up information according to the second information;
if the first check information is different from the second check information, the first device determines that the link state is an idle state;
if the first check information is the same as the second check information, the first device determines the link status according to the type of the data packet in the packet header and/or whether the data packet includes a load.
In another possible design, the determining module is specifically configured to:
if the type of the data packet is a first type or the data packet does not include a load, the first device determines that the link state is an idle state, and the first type is used for indicating that the data packet does not include a load;
if the type of the data packet is a second type, or the data packet includes a load, the first device determines that the link state is a busy state.
In another possible design, the sending module is specifically configured to:
the first equipment carries out modulation processing on the audio data through a preset modulation mode and a preset physical bandwidth to obtain modulation data;
the first device determines the audio packet according to the modulation data, wherein the audio packet comprises the modulation data and a packet header;
the first device sends the audio packet to the second device.
In another possible design, the sending module is specifically configured to:
the first equipment sends the identification of the current data frame to the second equipment;
the first device receives interception information sent by the second device, where the interception information is used to indicate a receiving state of the second device for N data frames, where the N data frames include the current data frame and N-1 data frames located before and closest to the current data frame, the receiving state is a receiving success or a receiving failure, and N is an integer greater than or equal to 1;
the first equipment determines data frames which are not listened by the second equipment according to the interception information;
the first device sends data frames to the second device that are not heard by the second device.
In another possible design, the sending module is specifically configured to: before the first device sends the identifier of the current data frame to the second device, the first device sends link information between the first device and the data source device to the second device, and the link information is used for establishing a first bidirectional link between the second device and the data source device.
In another possible design, after the second device fails to listen to the data packet sent by the data source device to the first device in the first time slot, the state of the second device is a receiving state.
In another possible design, the wireless connection is a bluetooth connection.
In another possible design, the preset modulation mode is quadrature phase shift keying or eight phase shift keying, the preset physical bandwidth is 2 mhz, and the physical rate is 4 mbit/s or 6 mbit/s.
In a third aspect, an embodiment of the present invention provides a data transmission apparatus, including: a processor and a memory;
the memory is used for storing computer execution instructions;
the processor is configured to execute the computer executable instructions stored by the memory to cause the processor to perform the method of any one of the above first aspects.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the processor executes the computer-executable instructions, the method according to any one of the above first aspects is implemented.
The data transmission method and device provided by the embodiment of the invention comprise the following steps: the first device receives a data packet in a first time slot, the data packet being either noise or a data packet received from a data source. And the first equipment determines the link state between the data source equipment and the first equipment according to the data packet, wherein the link state is an idle state or a busy state. And when the first equipment determines that the link state is the idle state, sending audio data to the second equipment in the first time slot, wherein the audio data is the audio data received by the first equipment from the data source equipment. In the above process, when the first device determines that the link state is the idle state, the first device sends the audio data to the second device in the first time slot, so that the first device sends the audio data to the second device without wasting the normal communication time with the data source device, and the communication efficiency of the first device and the data source device and the sending efficiency of the first device sending the audio data to the second device are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of an application scenario of a data transmission method according to an embodiment of the present invention;
fig. 2 is a first flowchart illustrating a data transmission method according to an embodiment of the present invention;
FIG. 3 is a second flowchart illustrating a data transmission method according to an embodiment of the present invention;
fig. 4 is a third schematic flowchart of a data transmission method according to an embodiment of the present invention;
fig. 5 is a time slot structure of a first time slot according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a hardware structure of a data transmission apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic view of an application scenario of a data transmission method according to an embodiment of the present invention. As shown in fig. 1, includes: a data source device 101 and an audio device group 102, wherein the audio device group 102 includes: a first device 11 and a second device 12.
Alternatively, the data source device 101 may be a smartphone or a tablet computer.
Optionally, the first device 11 and the second device 12 are both wireless transceiver devices, for example: earphones, sound boxes, or the like.
Alternatively, the data source device 101 may interact with the first device 11 through wireless transmission, and the first device may interact with the second device 12 through wireless transmission. The Wireless transmission mode may be bluetooth or Wireless Fidelity (WIFI for short). It should be noted that, for the detailed description of the first device and the second device, refer to the embodiment of fig. 2, and here, a detailed explanation is not provided.
In practical applications, after a communication link is established between the data source device 101 and the first device 11, the data source device 101 interacts with the first device 11. For example, after the first device 11 receives a data packet sent by the data source device 101 in the first time slot, the link status of the communication link may be determined according to the data packet, and after determining that the link status is the idle status, the first device 11 interacts with the second device 12.
For example, after the first device determines that the link status is idle, the first device may transmit audio data received in a previous time slot to the second device in the first time slot. For example, when the link status is busy, the first device receives a data packet transmitted from the data source device in the first time slot, and does not transmit audio data received in the previous time slot to the second device. In the process, the first device sends the audio data to the second device in the first time slot, so that the normal communication time length of the first device and the data source device does not need to be wasted, the audio data is sent to the second device, and the communication efficiency between the first device and the data source device and the sending efficiency of the first device to the second device for sending the audio data are improved.
The technical means shown in the present application will be described in detail below with reference to specific examples. It should be noted that the following embodiments may be combined with each other, and the description of the same or similar contents in different embodiments is not repeated.
Specifically, taking an example that the audio device group includes two devices (a first device and a second device), in the embodiment of fig. 2, the data transmission method provided in the present application is described.
Fig. 2 is a first flowchart of a data transmission method according to an embodiment of the present invention. As shown in fig. 2, the data transmission method includes:
s201: the first device receives a data packet in a first time slot, the data packet being either noise or a data packet received from a data source.
Optionally, the execution main body of the embodiment of the present invention may be the first device, and may also be a data transmission device disposed in the first device, where the data transmission device may be implemented by a combination of software and/or hardware.
Optionally, the data packet is noise or a data packet received from a data source. For example, the noise may be a wireless signal received by the first device and transmitted by a wireless transceiver device other than the data source device, or the first device may receive noise (e.g., white gaussian noise) when the data source device is not transmitting data to the first device. Further, when the data packet is received from a data source, the data packet includes synchronization information and a header.
S202: and the first equipment determines the link state between the data source equipment and the first equipment according to the data packet, wherein the link state is an idle state or a busy state.
Optionally, the link status is a link status between the data source device and the first device in the first time slot.
Optionally, the first device may determine the link status according to whether the data packet includes the synchronization information and the packet header; the link status may also be determined based on the type of packet in the header and/or whether the packet includes a load after determining that the synchronization information and the header are included in the packet.
Specifically, the implementation procedure of the first device determining the link status between the data source device and the first device according to the data packet may be referred to as S301 ~ S312 in the embodiment of fig. 3.
S203: and when the first equipment determines that the link state is the idle state, sending audio data to the second equipment in the first time slot, wherein the audio data is the audio data received by the first equipment from the data source equipment.
Specifically, the audio data sent by the first device to the second device in the first time slot is the audio data in the data packet sent by the data device received by the first device in the previous time slot.
Optionally, if the first device is a left channel (or right channel) device and the second device is a right channel (or left channel) device, the audio data sent by the first device to the second device in the first time slot may be right channel audio data (or left channel audio data) in the audio data in the data packet sent by the data device received by the first device in the previous time slot.
The data transmission method provided by the embodiment of the invention comprises the following steps: the first device receives a data packet in a first time slot, the data packet being either noise or a data packet received from a data source. And the first equipment determines the link state between the data source equipment and the first equipment according to the data packet, wherein the link state is an idle state or a busy state. And when the first equipment determines that the link state is the idle state, sending audio data to the second equipment in the first time slot, wherein the audio data is the audio data received by the first equipment from the data source equipment. In the above process, when the first device determines that the link state is the idle state, the first device sends the audio data to the second device in the first time slot, so that the first device sends the audio data to the second device without wasting the normal communication time with the data source device, and the communication efficiency of the first device and the data source device and the sending efficiency of the first device sending the audio data to the second device are improved.
Fig. 3 is a second flowchart illustrating a data transmission method according to an embodiment of the present invention. As shown in fig. 3, the data transmission method includes:
s301: the data source device sends a data packet to the first device.
Alternatively, the data packet may be a 1-slot packet, a 3-slot packet, or a 5-slot packet, etc.
Here, a 1-slot packet indicates that it takes 625 microseconds to transmit the data packet, the 1-slot packet is generally referred to as "2 DH 1", a 3-slot packet indicates that it takes 1875 microseconds to transmit the data packet, and is generally referred to as "2 DH 3", and a 5-slot packet indicates that it takes 3120 microseconds to transmit the data packet, and is generally referred to as "2 DH 5".
S302: the first device receives a data packet in a first time slot, the data packet being either noise or a data packet received from a data source.
Specifically, the execution method of S302 is the same as the execution method of S201, and the execution process of S302 is not described herein again.
Please refer to the embodiment in fig. 5 for a detailed description of the first timeslot. And will not be described in detail herein.
S303: the first device determines whether the data packet includes synchronization information and a header.
If not, go to S312.
If yes, go to step S304.
Optionally, the first device may detect the data packet according to a preset communication protocol standard, so as to determine whether the data packet includes the synchronization information and the packet header. The preset communication protocol standard is a preset communication protocol standard between the audio equipment group and the data source equipment.
S304: the first device obtains first synchronization information in the data packet.
Specifically, the first device may further obtain the first synchronization information in a header of the data packet.
S305: the first device obtains the correlation degree of the first synchronization information and the preset synchronization information.
S306: the first device determines whether the correlation is less than a first threshold.
If yes, go to S312.
If not, go to step S307.
S307: the first device obtains first check information and second information in the packet header, wherein the second information is information except the first check information in the packet header.
S308: the first device generates second check-up information according to the second information.
S309: the first device judges whether the first check information and the second check information are the same.
If not, go to S312.
If yes, go to S310.
S310: the first device determines whether the type of the packet is a first type or whether the packet does not include a payload.
If yes, go to S312.
If not, go to S311.
Alternatively, the first type may be any one of a NULL packet (NULL) type, a detection packet or a polling Packet (POLL) type, or a noise type.
Optionally, if the first device determines that the type of the data packet is the first type according to the type of the data packet in the packet header, determining that the link state is the idle state; or, the first device checks fields included in the data packet, and determines that the link state is the idle state when determining that no field corresponding to the load exists in the data packet.
S311: the first device determines that the link status is a busy status.
Specifically, when the type of the data packet is determined to be the second type, or the data packet includes a load, the link state may be determined to be a busy state.
Optionally, if the first device determines that the type of the data packet is the second type according to the type of the data packet in the packet header, determining that the link state is a busy state; or, if the first device checks fields in the data packet and determines that a field corresponding to the load exists in the data packet, it determines that the link state is a busy state.
Optionally, when the first device determines that the link status is a busy status and the data packet is of the second type, the first device may send an Acknowledgement Character (ACK) to the data source device, where the ACK is used to indicate that the first device correctly receives the data packet sent by the data source device.
S312: the first device determines that the link state is an idle state.
S313: the first device modulates the audio data to be sent from the first device to the second device in the first time slot by a preset modulation mode and a preset physical bandwidth to obtain modulated data.
Specifically, the preset modulation mode is Quadrature Phase Shift Keying (QPSK) or 8 Phase Shift Keying (8 PSK), the preset physical bandwidth is 2 mhz, and the physical rate is 4 megabits/second or 6 megabits/second.
Alternatively, the audio data to be transmitted may be mono audio data, or binaural audio data.
In practical applications, when the data packet sent by the data source device to the first device is "2 DH 5", the size of the payload in the data packet is 670 bytes (Byte), and if the audio data sent by the first device to the second device is monaural audio data, the size of the monaural audio data is about 335 bytes. In the prior art, a first device generally modulates monaural audio data to be transmitted to a second device by using a 2 mbit/s modulation bandwidth and a QPSK modulation method to obtain modulated data, when the first device transmits the modulated data to the second device, a required transmission time duration is 335 × 8/2=1.34 milliseconds (ms), and since 1.34ms is greater than 1.25ms (a time duration of one frame), the first device needs to transmit the modulated data to the second device 2 times before the modulated data can be completely transmitted to the second device. In the present application, if the first device modulates the monaural audio data sent to the second device by using a modulation bandwidth of 4 mbits/sec and a QPSK modulation method to obtain modulated data, when the first device sends the modulated data to the second device, the required sending time is 335 × 8/4=770 microseconds (us), and since 770us is less than 1.25ms, the first device needs to send the modulated data to the second device 1 time, so that the number of times that the first device sends data to the second device is reduced, and the sending delay is further reduced.
S314: the first device determines an audio packet based on the modulated data, the audio packet including the modulated data and a packet header.
Optionally, the first device may perform framing processing on the modulation data and the packet header information according to a preset communication protocol standard to obtain the audio packet.
S315: the first device transmits audio packets to the second device in a first time slot.
The data transmission method provided by the embodiment of the invention comprises the following steps: the data source device transmits the data packet to the first device. The first device receives a data packet in a first time slot, the data packet being either noise or a data packet received from a data source. The first device determines whether the data packet includes synchronization information and a header. If so, the first device determines that the link state is an idle state. If not, the first device acquires the first synchronization information in the data packet. The first device obtains the correlation degree of the first synchronization information and the preset synchronization information. The first device determines whether the correlation is less than a first threshold. If so, the first device determines that the link state is an idle state. If not, the first device obtains first check information and second information in the packet header, wherein the second information is information except the first check information in the packet header. The first device generates second check-up information according to the second information. The first device judges whether the first check information and the second check information are the same. If not, the first device determines that the link state is an idle state. If so, judging whether the type of the data packet is the first type or not, or whether the data packet does not include the load or not. If so, the first device determines that the link state is an idle state. If not, the first device determines that the link state is a busy state. The first device modulates the audio data to be sent from the first device to the second device in the first time slot by a preset modulation mode and a preset physical bandwidth to obtain modulated data. The first device determines an audio packet based on the modulated data, the audio packet including the modulated data and a packet header. The first device transmits audio packets to the second device in a first time slot. In the method, when the first device determines that the link state is the idle state, the first device sends the audio packet to the second device in the first time slot, so that the first device does not waste the normal communication time with the data source device and sends the audio packet to the second device, and the communication efficiency of the first device and the data source device and the sending efficiency of the first device sending the audio packet to the second device are improved. Furthermore, the modulation data in the audio packet sent by the first device to the second device is obtained by modulating the audio data to be sent to the second device through a preset modulation mode and a preset physical bandwidth, so that the frequency of completely sending the audio packet to the second device by the first device is reduced, and further the sending time delay is reduced.
On the basis of the above embodiment, the data transmission method provided by the present application is further described below with reference to the embodiment of fig. 4. Specifically, please refer to the embodiment in fig. 4.
Fig. 4 is a third flowchart of a data transmission method according to an embodiment of the present invention. As shown in fig. 4, the data transmission method includes:
s401: the first device sends link information between the first device and the data source device to the second device, and the link information is used for establishing a first bidirectional link between the second device and the data source device.
Specifically, the first bidirectional link enables the second device to listen to a data packet sent by the data source device to the first device, and feeds back the confirmation information according to the listening result according to the preset condition.
Further, the preset condition may be that when the second device does not sense a data packet sent by the data source device to the first device, the second device sends first information to the data source device, where the first information indicates that the second device does not receive the data packet; and when the second equipment senses the data packet sent to the first equipment by the data source equipment, the first information is not sent to the data source equipment.
S402: the data source device sends a data packet to the first device.
Specifically, the execution method of S402 is the same as the execution method of S301, and the execution process of S402 is not described herein again.
S403: the first device receives the data packet transmitted by the data source device in a first time slot.
S404: and the first equipment determines that the link state of a communication link between the data source equipment and the first equipment is an idle state according to the data packet.
It should be noted that, an execution method for the first device to receive the data packet sent by the data source device in the first time slot is the same as the execution method of S402, and here, an execution process for the first device to receive the data packet sent by the data source device in the first time slot is not described again.
Further, the execution method for the first device to determine that the link state is the idle state according to the data packet may refer to the execution method of S301 ~ S312, and details of the execution process for the first device to determine that the link state is the idle state according to the data packet are not repeated here.
S404: the second device receives link information between the first device and the data source device, wherein the link information is used for establishing a first bidirectional link between the second device and the data source device, and listens for a data packet sent to the first device by the data source device according to the first bidirectional link.
Optionally, the link information received by the second device may be sent by the first device, or may be sent by the data source device.
It should be noted that the second device determines whether to successfully listen to the data source device to send the data packet to the first device according to the data packet.
In a possible implementation manner, after the second device fails to listen to the data packet sent by the data source device to the first device in the first time slot, the state of the second device is the receiving state. I.e. the second device may receive the data sent by the first device.
S405: the first device sends the identification of the current data frame to the second device.
It should be noted that the identifier of the current data frame is an identifier of the latest data frame buffered in the first device.
Alternatively, the identification of the data frame may be a consecutive sequence number, such as: 0. 1, 2, etc., and other combinations of contiguous data, e.g., 00, 01, 10, etc. In particular, the specific representation of the logo is not limited in this application.
S406: the second device receives an identification of the current data frame.
S407: the second device sends interception information to the first device, wherein the interception information is used for indicating the receiving state of the second device to the N data frames, the N data frames comprise a current data frame and N-1 data frames which are located before the current data frame and are closest to the current data frame, the receiving state is successful receiving or failed receiving, and N is an integer greater than or equal to 1.
Alternatively, N may be 1, 2, 3, etc.
Alternatively, the reception status may be "1" or "0", where "1" indicates reception success and "0" indicates reception failure, and may also be "tune" or "flush", where "tune" indicates reception success and "flush" indicates reception failure.
For example, when N is 5, and the reception status is "1" or "0", if the sequence numbers 1, 2, 3, 4, and 5 are used to respectively identify data frames, the interception information may include 1-1, 0-2, 1-3, 1-4, and 1-5, where 1-1 indicates that the first data frame is successfully received, 2-0 indicates that the second data frame is unsuccessfully received, 3-1 indicates that the third data frame is successfully received, 4-1 indicates that the fourth data frame is successfully received, and 5-1 indicates that the fifth data frame is successfully received.
S408: the first device receives interception information sent by the second device, and determines data frames which are not intercepted by the second device according to the interception information.
Optionally, the first device stores an identifier of a successfully buffered data frame, or stores an identifier of a buffered data frame and a receiving status of each data frame (that is, a receiving success).
Alternatively, the first device may determine, based on the identification of the successfully buffered data frames (or the identification of the buffered data frames, and the reception status of each data frame) and the listening information, the data frames that the second device did not listen to.
For example, when the first device determines, according to the identifier of the successfully buffered data frame and the interception information, that the second device does not listen to the data frame, if the interception information includes 1-1, 0-2, 1-3, 1-4, and 1-5, and there is 1, 2, 3, 4, and 5 in the identifier of the successfully buffered data frame, it may determine that the data frame that the second device does not listen to is the data frame corresponding to the identifier 2.
S409: the first device sends a data frame to the second device in the first time slot that is not sensed by the second device.
Optionally, the first device may directly send the non-listened data frame to the second device, or modulate audio data in the non-listened data frame by using a preset modulation method and a preset physical bandwidth, perform data modulation, obtain the listened data frame from the modulated data and the header information, and send the non-listened data frame to the second device.
The data transmission method provided by the application comprises the following steps: the first device sends link information between the first device and the data source device to the second device, and the link information is used for establishing a first bidirectional link between the second device and the data source device. The data source device sends a data packet to the first device. The first device receives a data packet sent by the data source device in a first time slot, and determines that the link state of a communication link between the data source device and the first device is an idle state according to the data packet. The second device receives link information between the first device and the data source device, establishes a first bidirectional link with the second device and the data source device according to the link information, and listens for a data packet sent to the first device by the data source device according to the first bidirectional link. The first device sends the identification of the current data frame to the second device. The second device receives the identifier of the current data frame and sends interception information to the first device, wherein the interception information is used for indicating the receiving state of the second device to the N data frames, the N data frames comprise the current data frame and N-1 data frames which are located before the current data frame and are closest to the current data frame, the receiving state is successful receiving or failed receiving, and N is an integer greater than or equal to 1. The first device receives interception information sent by the second device, and determines data frames which are not intercepted by the second device according to the interception information. The first device sends a data frame to the second device in the first time slot that is not sensed by the second device. In the process, the second device monitors the data packet sent by the data source device to the first device, and the first device sends the data frame which is not detected by the second device to the second device, so that the data volume sent by the first device to the second device is reduced, and the sending rate of the data sent by the first device to the second device is improved.
The first slot will be described with reference to fig. 5 when the packet received by the first device is of the first type (POLL type or NULL type).
Fig. 5 is a time slot structure of a first time slot according to an embodiment of the present invention. As shown in fig. 5, the first time slot 50 includes 2 time slots, wherein 2 time slots are time slot 1 and time slot 2, respectively, each time slot includes two half time slots, each half time slot has a duration of 312.5 microseconds, and each time slot has a duration of 625 microseconds.
Wherein, the first time slot 50 occupied by the header time slot 51 and the idle time slot 52 comprises 4 time slots. It should be noted that the header slot 51 usually takes 126 microseconds, and the idle slot 52 usually takes 1124 microseconds (1.25-126 microseconds). Thus, the first device may transmit audio data to the second device in the idle time slot 52 (1124 microseconds).
Fig. 6 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention. As shown in fig. 6, the data transmission device 10 includes: a receiving module 11, a determining module 12 and a sending module 13, wherein,
the receiving module 11 is configured to receive a data packet in a first time slot, where the data packet is noise or a data packet received from the data source device;
the determining module 12 is configured to determine, by the first device, a link state between the data source device and the first device according to the data packet, where the link state is an idle state or a busy state;
the sending module 13 is configured to send, when the first device determines that the link status is an idle status, audio data to the second device in the first time slot, where the audio data is audio data received by the first device from the data source device.
The data transmission apparatus 10 provided by the present application is applied to a first device in an audio device group, the first device is wirelessly connected with a data source device and a second device, the second device is a device in the audio device group except the first device,
the apparatus provided in this embodiment may be used to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
In one possible design, the determining module 12 is specifically configured to:
the first equipment judges whether the data packet comprises synchronization information and a packet header;
if not, the first device determines that the link state is an idle state;
if so, the first device determines the link state according to the header of the data packet and/or whether the data packet includes a load.
In another possible design, the determining module 12 is specifically configured to:
the first equipment acquires first synchronization information in the data packet;
the first equipment acquires the correlation degree of the first synchronization information and the preset synchronization information;
and the first equipment determines the link state according to the correlation.
In another possible design, the determining module is specifically configured to:
if the correlation degree is smaller than a first threshold value, the first equipment determines that the link state is the idle state;
and if the correlation degree is determined to be greater than or equal to the first threshold, the first device determines the link state according to a verification result of verifying the packet header.
In another possible design, the determining module 12 is specifically configured to:
the first device obtains first verification information and second information in the packet header, wherein the second information is information except the first verification information in the packet header;
the first equipment generates second check-up information according to the second information;
if the first check information is different from the second check information, the first device determines that the link state is an idle state;
if the first check information is the same as the second check information, the first device determines the link status according to the type of the data packet in the packet header and/or whether the data packet includes a load.
In another possible design, the determining module 12 is specifically configured to:
if the type of the data packet is a first type or the data packet does not include a load, the first device determines that the link state is an idle state, and the first type is used for indicating that the data packet does not include a load;
if the type of the data packet is a second type, or the data packet includes a load, the first device determines that the link state is a busy state.
In another possible design, the sending module 13 is specifically configured to:
the first equipment carries out modulation processing on the audio data through a preset modulation mode and a preset physical bandwidth to obtain modulation data;
the first device determines the audio packet according to the modulation data, wherein the audio packet comprises the modulation data and a packet header;
the first device sends the audio packet to the second device.
In another possible design, the sending module 13 is specifically configured to:
the first equipment sends the identification of the current data frame to the second equipment;
the first device receives interception information sent by the second device, where the interception information is used to indicate a receiving state of the second device for N data frames, where the N data frames include the current data frame and N-1 data frames located before and closest to the current data frame, the receiving state is a receiving success or a receiving failure, and N is an integer greater than or equal to 1;
the first equipment determines data frames which are not listened by the second equipment according to the interception information;
the first device sends data frames to the second device that are not heard by the second device.
In another possible design, the sending module 13 is specifically configured to: before the first device sends the identifier of the current data frame to the second device, the first device sends link information between the first device and the data source device to the second device, and the link information is used for establishing a first bidirectional link between the second device and the data source device.
In another possible design, after the second device fails to listen to the data packet sent by the data source device to the first device in the first time slot, the state of the second device is a receiving state.
In another possible design, the wireless connection is a bluetooth connection.
In another possible design, the preset modulation mode is quadrature phase shift keying or eight phase shift keying, the preset physical bandwidth is 2 mhz, and the physical rate is 4 mbit/s or 6 mbit/s.
The apparatus provided in this embodiment may be used to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
Fig. 7 is a schematic diagram of a hardware structure of a data transmission apparatus according to an embodiment of the present invention. As shown in fig. 7, the data transmission device 20 includes: a processor 21 and a memory 22, wherein,
the memory 22 is used for storing computer execution instructions;
the processor 21 is configured to execute computer-executable instructions stored in the memory to cause the processor to perform any of the method embodiments of the data transmission method described above.
Alternatively, the memory 22 may be separate or integrated with the processor 201.
When the memory 22 is provided separately, the data transfer apparatus further includes a bus 203 for connecting the memory 22 and the processor 21.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer executes instructions, and when a processor executes the computer to execute the instructions, the data transmission method in any of the above method embodiments is implemented.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of modules is only one logical division, and other divisions may be realized in practice, for example, a plurality of modules may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.
The integrated module implemented in the form of a software functional module may be stored in a computer-readable storage medium. The software functional module is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor to execute some steps of the methods according to the embodiments of the present application.
It should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.
The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile storage NVM, such as at least one disk memory, and may also be a usb disk, a removable hard disk, a read-only memory, a magnetic or optical disk, etc.
The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.
The storage medium may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (15)
1. A data transmission method is applied to a first device in an audio device group, the first device is respectively in wireless connection with a data source device and a second device, and the second device is a device in the audio device group except the first device, and the method comprises the following steps:
the first device receives a data packet in a first time slot, wherein the data packet is noise or a data packet received from the data source device;
the first equipment determines a link state between the data source equipment and the first equipment according to the data packet, wherein the link state is an idle state or a busy state;
and when the first device determines that the link state is an idle state, sending audio data to the second device in the first time slot, wherein the audio data is the audio data received by the first device from the data source device.
2. The method of claim 1, wherein the first device determines the link status between the data source device and the first device according to the data packet, comprising:
the first equipment judges whether the data packet comprises synchronization information and a packet header;
if not, the first device determines that the link state is an idle state;
if so, the first device determines the link state according to the header of the data packet and/or whether the data packet includes a load.
3. The method of claim 2, wherein the determining the link status by the first device according to whether a header of the data packet and/or a payload is included in the data packet comprises:
the first equipment acquires first synchronization information in the data packet;
the first equipment acquires the correlation degree of the first synchronization information and preset synchronization information;
and the first equipment determines the link state according to the correlation.
4. The method of claim 3, wherein the first device determines the link status according to the correlation, comprising:
if the correlation degree is smaller than a first threshold value, the first equipment determines that the link state is the idle state;
and if the correlation degree is determined to be greater than or equal to the first threshold, the first device determines the link state according to a verification result of verifying the packet header.
5. The method of claim 4, wherein the determining, by the first device, the link status according to a verification result of the packet header includes:
the first device obtains first verification information and second information in the packet header, wherein the second information is information except the first verification information in the packet header;
the first equipment generates second check-up information according to the second information;
if the first check information is different from the second check information, the first device determines that the link state is an idle state;
if the first check information is the same as the second check information, the first device determines the link status according to the type of the data packet in the packet header and/or whether the data packet includes a load.
6. The method of claim 5, wherein the determining the link status by the first device according to the type of the packet in the header and/or whether the packet includes a payload comprises:
if the type of the data packet is a first type or the data packet does not include a load, the first device determines that the link state is an idle state, and the first type is used for indicating that the data packet does not include a load;
if the type of the data packet is a second type, or the data packet includes a load, the first device determines that the link state is a busy state.
7. The method of any of claims 1-6, wherein the first device transmitting audio data to be transmitted to the second device in the first time slot comprises:
the first equipment carries out modulation processing on the audio data through a preset modulation mode and a preset physical bandwidth to obtain modulation data;
the first device determines an audio packet according to the modulation data, wherein the audio packet comprises the modulation data and a packet header;
the first device sends the audio packet to the second device.
8. The method of claim 7, wherein the first device transmitting audio data to be transmitted to the second device in the first time slot comprises:
the first equipment sends the identification of the current data frame to the second equipment;
the first device receives interception information sent by the second device, where the interception information is used to indicate a receiving state of the second device for N data frames, where the N data frames include the current data frame and N-1 data frames located before and closest to the current data frame, the receiving state is a receiving success or a receiving failure, and N is an integer greater than or equal to 1;
the first equipment determines data frames which are not listened by the second equipment according to the interception information;
the first device sends data frames to the second device that are not heard by the second device.
9. The method of claim 8, wherein before the first device sends the identification of the current data frame to the second device, further comprising:
and the first equipment sends link information between the first equipment and the data source equipment to the second equipment, wherein the link information is used for establishing a first bidirectional link between the second equipment and the data source equipment.
10. The method of claim 9,
and after the second device fails to monitor the data packet sent by the data source device to the first device in the first time slot, the state of the second device is a receiving state.
11. The method of claim 10, wherein the wireless connection is a bluetooth connection.
12. The method according to claim 11, wherein the predetermined modulation scheme is quadrature phase shift keying or eight phase shift keying, the predetermined physical bandwidth is 2 mhz, and the physical rate is 4 mbit/s or 6 mbit/s.
13. A data transmission apparatus, applied to a first device in an audio device group, where the first device is wirelessly connected to a data source device and a second device, and the second device is a device in the audio device group other than the first device, the apparatus comprising: a receiving module, a determining module and a sending module, wherein,
the receiving module is configured to receive a data packet in a first time slot, where the data packet is noise or a data packet received from the data source device;
the determining module is configured to determine, by the first device according to the data packet, a link state between the data source device and the first device, where the link state is an idle state or a busy state;
the sending module is configured to send, when the first device determines that the link status is an idle status, audio data to the second device in the first time slot, where the audio data is audio data received by the first device from the data source device.
14. A data transmission apparatus, comprising: a processor and a memory;
the memory is used for storing computer execution instructions;
the processor is configured to execute the computer-executable instructions stored by the memory to cause the processor to perform the data transmission method of any one of claims 1 to 12.
15. A computer-readable storage medium having computer-executable instructions stored thereon, which when executed by a processor, implement the data transmission method of any one of claims 1 to 12.
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