WO2022126315A1 - 数据传输方法和数据传输设备 - Google Patents
数据传输方法和数据传输设备 Download PDFInfo
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Definitions
- the present application relates to the field of network communication, and in particular, to a data transmission method and device.
- the network connection devices in the cockpit domain mainly include a cockpit domain controller (CDC, also known as a car machine), in-vehicle audio and video and other in-vehicle equipment (for example, speakers, microphones, etc.), in-vehicle screens, and smart terminals.
- CDC cockpit domain controller
- the car machine and the audio and video equipment in the car are mainly connected by wire.
- the wired connection method is restricted by factors such as cable cost and in-vehicle wiring.
- the wireless connection between the CDC and other in-vehicle devices has gradually emerged.
- the CDC is responsible for scheduling wireless resources for other in-vehicle devices, so as to realize the communication between the in-vehicle device and the CDC.
- Commonly used wireless technologies include wireless communication technologies such as Bluetooth, Wifi, and cellular networks.
- In-vehicle active noise reduction is to neutralize engine noise, road noise, wind noise and other noises through the in-vehicle speakers to transmit reversed-phase acoustic signals, so as to achieve a global or regional static field in the car, and achieve the purpose of eliminating or reducing in-vehicle noise.
- multiple on-board microphones need to collect in-vehicle noise signals, transmit them to the processor unit to generate anti-phase noise signals, and then transmit the anti-phase noise signals to multiple on-board speakers for playback, so as to achieve the effect of active noise reduction at the cockpit receiving end .
- the noise collection, processing, transmission, generation of the anti-phase noise signal, and transmission of the anti-phase noise signal to the car speaker for playback and by the cockpit receiver For example, the time delay of the reception by the human ear needs to be smaller than the time delay of the real noise transmitted to the receiving end of the cockpit and played, and the transmission of the noise signal and the anti-phase noise signal needs to meet high reliability.
- a microphone array can be used. That is, a single microphone array contains several microphones, and a single microphone array aggregates data from multiple microphones and sends it to the CDC for processing.
- the active noise reduction array service data is regarded as a data packet, and a cyclic redundancy check (Cyclic redundancy check, CRC check) is performed at the Media Access Control (MAC) layer.
- CRC check Cyclic redundancy check
- the entire data packet will be discarded. For example, when there are data of N array elements in a microphone array, and an error occurs in the data transmission of one of the array elements in the data transmission of the access layer, the entire data packet containing the N array elements will be discarded. In this way, the information transmission efficiency is low.
- the embodiments of the present application propose a data transmission method and device, which can improve information transmission efficiency.
- the present application provides a data transmission method for transmitting original data, the data transmission method comprising: receiving original data and attribute information thereof from at least one data source; The data is segmented to obtain a plurality of data parts; the respective check codes of the plurality of data parts are calculated according to each of the plurality of data parts; and the original data is sent in the form of a plurality of coding blocks, Each coded block corresponds to one data part of the plurality of data parts, and includes the data part and a corresponding check code.
- the original data of the data source is further segmented based on the attribute information of the original data, and each data part is individually encoded and a check code is added for transmission.
- each segmented data part can be associated with attribute information, each data part has the corresponding data source. It is possible to realize the transmission of data from different data sources without interfering with each other to improve the transmission efficiency.
- the segmenting the original data and the calculating the respective check codes of the multiple data parts are performed during wireless communication It is implemented by the physical layer in the access layer protocol stack.
- the physical layer is implemented on the underlying hardware devices, and the underlying hardware devices have strong processing capabilities and can perform various operations faster. Therefore, data segmentation and calculation of check codes at the physical layer can reduce data segmentation. The time overhead of segment and calculation check code is improved, and the efficiency of data transmission is improved.
- the attribute information includes the number of quantization bits each used by the at least one data source .
- quantization refers to the process of approximating a continuous value of a signal (or a large number of possible discrete values) into a finite number (or less) of discrete values.
- quantization is mainly used in the conversion from continuous signals to digital signals. Continuous signals become discrete signals after sampling, and discrete signals become digital signals after quantization. The number of binary digits of the sampled value determines the quantization precision of the sampled value, also known as the number of quantization digits.
- the attribute information will include more than one kind of quantization bits, then the number of bits of each of the multiple data parts is the same as that of one of the at least one data source.
- the number of quantization bits used is the same, so that each data part includes a complete data sample of one of the data sources, so that at the receiving end, if some data parts are discarded due to verification failures, but other data parts due to verification success If it is provided to the user, then the user can at least obtain the complete data of some data sources for use.
- the number of bits of each data part can be equal to the same number of quantization bits, so that the storage and transmission of the segmented data parts are more neat and orderly, and each data part can be stored and transmitted in a more orderly manner.
- Parts can have a one-to-one correspondence with the data source, which further strengthens the association between each data part and the data source.
- the attribute information includes the sampling rate and quantization respectively adopted by the at least one data source digits.
- sampling rate also known as the sampling frequency or the sampling speed
- sampling frequency the sampling frequency
- sampling speed defines the number of samples per second that are extracted from a continuous signal to form a discrete signal, and it is expressed in Hertz (Hz).
- the inverse of the sampling frequency is called the sampling period or sampling time, which is the time interval between samples.
- the number of bits of each of the plurality of data parts is the number of bits of quantization used by one of the at least one data source.
- the positive integer multiple or the number of quantization bits employed by one of the at least one data source is a positive integer multiple of the number of bits in each of the data portions DS.
- the resource scheduling time interval can be further correlated with the sampling time interval, that is, the usage frequency of the physical resources can be calculated according to the sampling rate, so that It is possible to dynamically adjust the matching of physical resources through sampling rate and quantization bits, thereby improving the utilization of physical resources.
- the attribute information includes the number of the at least one data source.
- the number of data sources can also be directly used as attribute information, and the number of data sources can be divided equally based on the number of data sources, then the number of the multiple data parts is all
- the number of the at least one data source is a positive integer multiple of the number of the at least one data source or the number of the at least one data source is a positive integer multiple of the number of the plurality of data parts, so the specific value of the sampling rate or the number of quantization bits does not need to be transmitted, and the data Including data parts that can be divided into the same number of data parts directly according to the number of data sources, it will make the storage and transmission of the segmented data parts more neat and orderly, which is conducive to the simplicity of resource allocation, and can make each data part more clear Which data source comes from further strengthens the correlation between each data part and the data source, so the element failure in the microphone array can also be detected by finding errors in the associated data part.
- the attribute information at least includes the multiple pieces that segment the original data. information on the number of data parts.
- each data part of the original data is divided based on the number of segments that have been directly specified in the attribute information, and the original data is divided into several segments directly required in the attribute information a few paragraphs.
- the burden of redundant operations and logical judgments when determining segmentation rules according to specific attribute information can be eliminated, and the universality of formulating segmentation rules according to attribute information is improved.
- the data transmission method is applicable to a data transmission scenario of a smart cockpit, wherein the At least one data source is a microphone element in a vehicle-mounted microphone array; and the raw data is noise data collected by the microphone element.
- the above data transmission method is applied to the vehicle-mounted microphone array, so that the noise data collected by each microphone element of the microphone array can be reasonably divided into the noise data during the transmission process, so that each segment of the noise data in the form of data packets is relatively independent. It not only ensures the real-time requirements of noise data transmission, but also tries its best to ensure the accuracy of noise data, so as to calculate and send in a timely manner.
- a well-matched inverse noise signal lays the foundation.
- the present application provides a data transmission method for receiving original data, the data transmission method comprising: receiving a plurality of coding blocks, wherein each coding block includes one data part of a plurality of data parts and the a check code for a data portion obtained by segmenting raw data from at least one data source, the check code being calculated separately from each of the plurality of data portions using the check codes included in the multiple encoding blocks to verify the data parts included in the multiple encoding blocks; and at least providing the data parts that are successfully verified to the user of the original data .
- the original data from at least one data source if the verification of some data parts is successful and the verification of other data parts fails, all data parts of the original data are not discarded, but at least the data parts that are successfully verified are not discarded. Those data parts are provided to the user, so that even if some data parts of the original data fail to be transmitted, the user can still have data to use, thereby improving the efficiency of data transmission.
- the providing the original data to the user includes: setting the data part that fails to be verified as a specified bit value;
- the successful data part is spliced with the data part that has been set as the specified bit value to obtain spliced data; and the original data is sent to the user in the form of the spliced data.
- the data parts that are not successfully restored can be clearly distinguished from the data parts that are successfully restored, which is convenient for quick identification of whether each data part is in the state of successful restoration, and even does not need to send additional indication information mentioned below to specifically inform the existence or location of the wrong data part, and the number of bits of the spliced data formed by splicing the data part that has been successfully verified and the data part that has been set to the specified bit value is the same as the original data of the data source.
- the number of occupants remains the same, and each data part used for splicing also corresponds to the original data of each data source in order. In this way, the data processing at the same layer of the sender and the receiver will be equal, which is beneficial to simplify the work of resource scheduling in the wireless network to a certain extent.
- the providing the original data to the user includes: providing the original data to the user Sending the successfully verified data portion and first indication information, wherein the first indication information is used to indicate the corresponding sequence of the verified failed data portion in the original data.
- the data parts that fail to be verified are discarded, and only the data parts that pass the verification and the sequence numbers of the discarded data parts are passed to the user, so as to retain as much available information as possible and reduce the number of The transmission of invalid information of the failed part of the verification is convenient for later users to further process flexibly according to its function and purpose.
- the providing to the user of the original data includes sending the data to the user.
- the user can only receive the data that has been successfully recovered and know whether there is a transmission error in the current transmission process, without knowing the details of the transmission error, which will save cached data The space and the judgment time of the conditional statement.
- the checksum is performed on the data parts included in the plurality of coding blocks /or the user of the original data provided to the user is implemented at the physical layer in the access layer protocol stack of the wireless network.
- the physical layer is implemented on the underlying hardware device, and the underlying hardware device has strong processing capabilities and can perform various operations faster. Therefore, the checksum is performed at the physical layer to separate the verified data according to different situations. Processing can reduce time overhead and improve the efficiency of data transmission.
- the data transmission method may also be applicable to a data transmission scenario of a smart cockpit, wherein all the The at least one data source is a microphone array element in a vehicle-mounted microphone array; and the raw data is noise data collected by the microphone array element.
- the whole data packet of the noise data can be processed case by case, instead of discarding the whole data packet due to the check error of the individual data part. , avoid waiting for data retransmission, improve the efficiency and reliability of data transmission, so as to obtain sufficient timely and accurate noise data as a basis, and can calculate and generate a reverse noise signal that is highly matched with the real noise.
- the present application provides a data transmission device for transmitting original data
- the data transmission device includes a receiving module, a segmentation module, a computing module and a sending unit.
- the receiving module is used for receiving the original data and its attribute information from at least one data source.
- the segmentation module is configured to segment the data to obtain a plurality of data parts based on the attribute information.
- the calculation module is configured to calculate respective check codes of the multiple data parts according to each of the multiple data parts.
- the sending module is configured to send the original data in the form of multiple coding blocks, each coding block corresponding to one data part of the multiple data parts, including the data part and the corresponding check code.
- the segmentation module and the computing module are at a physical layer in an access layer protocol stack of a wireless network.
- the attribute information includes the number of quantization bits each used by the at least one data source .
- the number of bits of quantization used by the data sources is different, the number of bits of each of the plurality of data parts is the same as the number of bits of quantization used by one of the at least one data source.
- the number of bits in each data part may be equal to the same quantization bits.
- the attribute information at least includes a sampling rate and a sampling rate respectively adopted by the at least one data source and quantization bits.
- the number of bits of each of the plurality of data parts is the number of bits of quantization adopted by one of the at least one data source.
- the positive integer multiple or the number of quantization bits employed by one of the at least one data source is a positive integer multiple of the number of bits in each of the data portions DS.
- the attribute information includes the number of the at least one data source.
- the number of the plurality of data parts is a positive integer multiple of the number of the at least one data source or the number of the at least one data source is a positive integer multiple of the number of the plurality of data parts.
- the attribute information includes the plurality of segments that segment the original data Quantity information for the data part.
- the at least one data source is a microphone array element in a vehicle-mounted microphone array; and
- the raw data is the noise data collected by the microphone array element.
- the present application provides a data transmission device for receiving original data, the data transmission device including a receiving module, a checking module and a providing module.
- the receiving module is configured to receive a plurality of coding blocks, wherein each coding block includes one of the data parts of the plurality of data parts and a check code of the data part, and the plurality of data parts are obtained by checking the data from at least one data source;
- the original data is obtained by segmenting, and the check code is separately calculated according to each of the plurality of data parts.
- the verification module is configured to use the verification codes included in the multiple encoding blocks to verify the data parts included in the multiple encoding blocks.
- the providing module is used to provide at least the data part that has been successfully verified to the user of the original data.
- the providing module further includes a setting unit, a splicing unit and a sending unit.
- the setting unit is used to set the data part that has failed the check to the specified bit value.
- the splicing unit is used for splicing the data part that has been successfully verified with the data part that has been set to the specified bit value to obtain spliced data.
- the sending unit is configured to send the original data to the user in the form of the concatenated data.
- the providing module is configured to send the data part of the successful verification to the user and first indication information, wherein the first indication information is used to indicate the corresponding order of the data parts that fail to be verified in the original data.
- the providing module is configured to send the data part of the successful verification to the user and second indication information, where the second indication information is used to indicate whether there is a data part that fails to check.
- the checking module and/or the providing module access the wireless network The physical layer in the protocol stack.
- the at least one data source is a microphone array element in a vehicle-mounted microphone array; and
- the raw data is the noise data collected by the microphone array element.
- the present application provides a sending device, the sending device includes a first communication interface, at least one first processor and at least one first memory, where the first communication interface is used for communication with other devices , the at least one first memory stores first program instructions that, when executed by the at least one first processor, cause the at least one first processor to perform the first aspect or the first The method in any one implementation of the aspect.
- the transmitting device is a vehicle-mounted microphone array, and the microphone array further includes at least one microphone serving as the data source, which is used for monitoring the vehicle Noisy signal samples within.
- the present application further provides a receiving device, the receiving device includes a second communication interface, at least one second processor and at least one second memory, and the second communication interface is used for performing communication with other devices.
- communicating the at least one second memory stores second program instructions that, when executed by the at least one second processor, cause the at least one second processor to perform the second aspect or the above The method in any one implementation manner of the two aspects.
- the receiving device is a cockpit domain controller, and the cockpit domain controller is further configured to at least use the data part that has been successfully verified to generate a reverse noise signal.
- the present application provides a data transmission system, the data transmission system comprising the sending device according to the fifth aspect or the above possible implementations thereof, and the receiving device according to the sixth aspect and the above possible implementations thereof.
- the present application provides a computer-readable storage medium having program instructions stored thereon, wherein the program instructions, when executed by a computer, cause the computer to execute the method according to the first aspect or above.
- the program instructions when executed by a computer, cause the computer to execute the method according to the first aspect or above.
- the present application provides a computer program comprising program instructions that, when executed by a computer, cause the computer to execute the first aspect or any one of the implementation manners of the first aspect above or A method according to the second aspect or any one of the implementation manners of the above second aspect.
- the present application provides a vehicle, which includes the data transmission system and speaker of the seventh aspect, wherein the transmitting device in the data transmission system is a microphone array, and the microphone array further includes as the data transmission system At least one microphone of the source is used to sample the noise signal in the vehicle respectively, the receiving device in the data transmission system is a cockpit domain controller, and the cockpit domain controller is also used to at least use the data that has been verified successfully part to generate an inverse noise signal, and provide the generated inverse noise signal to the speaker for playback.
- the transmitting device in the data transmission system is a microphone array
- the microphone array further includes as the data transmission system
- At least one microphone of the source is used to sample the noise signal in the vehicle respectively
- the receiving device in the data transmission system is a cockpit domain controller
- the cockpit domain controller is also used to at least use the data that has been verified successfully part to generate an inverse noise signal, and provide the generated inverse noise signal to the speaker for playback.
- FIG. 1 is a schematic diagram of an exemplary application scenario according to an embodiment of the present application
- FIG. 2 is a schematic diagram of an access layer protocol stack architecture of a wireless network according to an embodiment of the present application
- FIG. 3 is a flowchart of a data transmission method according to an embodiment of the present application.
- FIG. 5 is a schematic structural diagram of a data transmission device according to an embodiment of the present application.
- FIG. 6 is a schematic structural diagram of a data transmission device according to another embodiment of the present application.
- FIG. 7 is a schematic diagram of a providing module according to another embodiment of FIG. 6;
- FIG. 8 is a schematic structural diagram of a sending device according to an embodiment of the present application.
- FIG. 9 is a schematic structural diagram of a receiving device according to an embodiment of the present application.
- FIG. 10 is a schematic structural diagram of a data transmission system according to an embodiment of the present application.
- FIG. 11 is a schematic structural diagram of a vehicle according to an embodiment of the present application.
- FIG. 12 is a schematic diagram of data transmission in the exemplary application scenario of FIG. 1 according to an embodiment of the present application.
- CDC Click Domain Controller
- CDC refers to a cockpit domain controller, which is also called a car machine, and is a domain controller of a vehicle intelligent cockpit.
- Cyclic Redundancy Check A channel coding technology that generates a short, fixed-digit check code based on data such as network packets or computer files. It is mainly used to detect or verify the possibility of data transmission or storage. An error occurred.
- ARQ Automatic Repeat Request
- the trigger modes of ARQ include time-based trigger mode, quantity-based trigger mode and bit-based trigger mode.
- the specific specification of ARQ can refer to related technical standards, such as 3GPP TS36.322 protocol, 3GPP TS38.322 protocol, etc.
- Original data data transmitted from the upper layer (the upper layer of the physical layer), where the upper layer may be at least one of the media access layer, the link control layer, the data link layer, the network layer, the transport layer, and the application layer.
- the original data may be in the form of packets, so the original data is also called a data packet or a data block (Transmission Block) under the network protocol. : TB).
- Attribute information characteristic information of the data source and/or original data.
- attribute information provides segmentation basis and rules for data segmentation
- attribute information includes, but is not limited to, the number of data sources, the amount of data, data identification, and data collection information, etc.
- the data collection information may have different aspects according to different business scenarios. For example, in the active noise reduction business scenario described below, the data collection information includes but is not limited to the sampling rate of noise, the number of quantization bits, the sampling time, etc. .
- Data Section A data section obtained by segmenting the original data of at least one data source based on the attribute information of the data.
- Coded Block A data unit or sub-packet formed by separately adding a CRC code to each data part DS.
- FIG. 1 shows a schematic diagram of an exemplary application scenario according to an embodiment of the present application.
- the application scenario shown in FIG. 1 is only one exemplary scenario to which the solution of the present application can be applied.
- the solution of the present application can also be applied to any other suitable application scenarios, such as but not limited to indoor scenarios such as home, office, and exhibition hall.
- the exemplary application scenario shown in FIG. 1 is a vehicle cockpit 100 , which includes a speaker 40 , a display 60 , a smart terminal 50 , a microphone array 80 and a CDC 90 .
- the CDC 90 can establish a communication connection with the microphone array 80, the speaker 40 and the smart terminal 50 via wired communication or wireless communication.
- the display 60 may be connected to the CDC 90 via wired communication, wireless communication, or the like, for example.
- the smart terminal 50 may include, but is not limited to, a mobile phone, a wearable device, and the like, for example.
- the speaker 40 may include, but is not limited to, a car speaker and the like, for example.
- the microphone array 80 may include one or more microphones, each of which is one of the elements of the microphone array 80 .
- the microphone array elements included in the microphone array 80 can be arranged in an array form, and the array form can be one or more combinations of geometric arrays such as linear arrays, planar arrays (eg, disk planar arrays), and spatial arrays.
- Microphone arrays play an important role in sound source localization, beamforming, and de-reverberation.
- the vehicle cabin 100 shown in FIG. 1 includes the microphone array 80 , the speaker 40 and the display 60 as in-vehicle devices, however, those skilled in the art should understand that the vehicle cabin 100 may include more or less in-vehicle devices.
- the CDC 90 is the master node, and the microphone array 80, the speaker 40, the display 60 and the smart terminal 50 are slave nodes.
- the master node is responsible for allocating resources to the slave nodes.
- the slave node obeys the schedule of the master node and uses the resources allocated by the master node to communicate with the master node.
- the master node and the slave node refer to two types of nodes that are logically functionally distinguished.
- the master node manages the slave nodes, has resource allocation capability or resource scheduling capability, and is responsible for scheduling time-frequency resources for the slave nodes.
- the slave node obeys the scheduling of the master node, and uses the time-frequency resources scheduled by the master node to communicate with the master node.
- the master node and at least one slave node form a communication domain.
- the at least one slave node establishes a communication connection with the master node, the master node schedules time-frequency resources for the at least one slave node, and each slave node uses the scheduled time-frequency resources to communicate with the master node.
- the master node may send resource scheduling signaling to the slave node through control signaling (for example, radio control signaling), where the resource scheduling signaling includes resources scheduled for the slave node, and the slave node uses the scheduled resources to send the master node to the master node.
- control signaling for example, radio control signaling
- the slave node uses the scheduled resources to send the master node to the master node.
- Node sends data.
- the vehicle-mounted active noise reduction service has the disadvantage of low information transmission efficiency.
- the microphone array 80 as the transmitter regards the noise data collected by each of its microphone array elements as a data packet and performs CRC check on it at the MAC layer to obtain its CRC code, and then the data packet and its CRC code are obtained through the wireless channel.
- the CRC code is sent to the CDC 90 as the receiver. After receiving the data packet and its CRC code from the microphone array 80, the CDC 90 performs a CRC check on the received data packet at the MAC layer.
- the CRC check of the data packet will fails, thus, the CDC 90 discards the entire packet and activates the ARQ mechanism for packet retransmission, and does not provide the packet to its user until it receives a packet with all bits successfully transmitted. After the ARQ mechanism is activated, the receiving end usually cannot receive the successfully transmitted data packets until after one or more retransmissions. This process takes time, resulting in low information transmission efficiency. It should be noted that a successful CRC check is usually referred to as a CRC check passed; a CRC check failure is usually also referred to as a CRC check failure.
- FIG. 2 shows a schematic structural diagram of an access layer protocol stack 200 of a wireless network according to an embodiment of the present application.
- the protocol stack 200 of the wireless network includes a network layer 210 , a data link layer 220 and a physical (PHY, Physical) layer 230 .
- the network layer 210 is responsible for routing to determine the path between two nodes.
- the network layer can also perform flow control (eg, IP protocol);
- the data link layer 220 ensures reliable transfer of data over the physical link. Data or instructions are encapsulated into specific frames that can be transmitted by the physical layer; the data link layer also includes functions such as access control, resource management, data segmentation, concatenation, and error correction.
- the data link layer 220 includes a link control (LC, Link Control) layer 221 and a media access control (MAC, Media Access Control) layer 222.
- LC Link Control
- MAC Media Access Control
- the adaptation sublayer/function 2210 at least adapts the protocol stack type and QoS parameters of the network layer 210 to the parameters identified by the access layer.
- the user plane includes a link control layer 221 and a medium access control layer 222 , wherein the adaptation sublayer/function 2210 is a functional entity and is included in the link control layer 221 .
- the management entity 700 performs the management function of the control plane through resource control/management signaling. Resource control/management signaling is not sent through the adaptation sublayer/function 2210, but is sent through the user plane protocol stack.
- the physical layer 230 utilizes the transmission medium to provide a physical connection for the data link layer 220 and to perform channel encoding or decoding.
- the data link layer 220 is connected to the physical layer 230 via a service access point (Service Accessing Point: SAP) 290 .
- SAP Service Accessing Point
- FIG. 3 shows a flowchart of a data transmission method according to the first embodiment of the present application.
- the method 300 shown in FIG. 3 is used for transmitting the original data, and can be implemented by a sending end, a sending device (see FIG. 8 ) or any other suitable device.
- the method 300 includes steps S810-S840.
- the original data TB and its attribute information from at least one data source are received.
- the data source may be, for example, but not limited to, the microphone array elements in the microphone array of the vehicle cabin, and the like.
- the raw data TB may be, for example, but not limited to, noise data collected by microphone array elements in the microphone array of the vehicle cabin, and the like.
- the attribute information of the original data TB may include, but is not limited to, the sampling rate and/or the number of quantization bits used by each microphone array element in the microphone array of the vehicle cabin, or the number of microphone array elements included in the microphone array, or , the number of data parts of the original data to be segmented, etc.
- step S820 based on the attribute information, the original data TB is segmented to obtain a plurality of data sections (Data Section, DS). Wherein, optionally, the plurality of data parts DS maintain a corresponding relationship with the at least one data source.
- the segmenting of the original data TB may be implemented, for example, but not limited to, in the physical layer 230 or the MAC layer 222 of the protocol stack 200 of the wireless network shown in FIG. 2 .
- step S830 the respective check codes of the plurality of data parts are calculated.
- the calculation of the check code of the data part can be implemented, for example, but not limited to, in the physical layer 230 or the MAC layer 222 of the protocol stack 200 of the wireless network shown in FIG. 2 .
- the check code may include, but is not limited to, a Cyclic Redundancy Check (CRC) code, a parity code, a Hamming code, and the like, for example.
- CRC Cyclic Redundancy Check
- step S840 the original data TB is sent in the form of a plurality of coding blocks CB, and each coding block CB corresponds to a data portion DS among the plurality of data portions DS, including the data portion DS and the corresponding data portion DS.
- Check code the original data TB is sent in the form of a plurality of coding blocks CB, and each coding block CB corresponds to a data portion DS among the plurality of data portions DS, including the data portion DS and the corresponding data portion DS.
- the original data TB of the data source is further segmented based on the attribute information of the original data TB, and each data part is individually encoded and a check code is added for transmission. For example, assuming that the N microphone elements in the microphone array have the same number of quantization bits, the TB is segmented according to the number of quantization bits to generate N DSs, and each DS corresponds to one microphone element.
- each segment of data can be associated with attribute information, each data part has the Corresponding possibility; it is also beneficial to independently accept verification in a segmented manner, so that data from different data sources can be transmitted without interference with each other, so as to improve transmission efficiency.
- the segmentation of the original data TB in step S820 and the calculation of the respective check codes of the plurality of data parts DS in step S820 are physical parameters in the protocol stack 200 of the wireless network shown in FIG. 2 .
- Layer 230 is implemented.
- the physical layer is implemented on the underlying hardware devices, and the underlying hardware devices have strong processing capabilities and can perform various operations faster. Therefore, segmenting the original data and calculating the CRC code at the physical layer can reduce the number of original data. The time overhead of segmenting and calculating the CRC code improves the efficiency of data transmission.
- the attribute information includes the number of quantization bits each employed by the at least one data source. This embodiment is aimed at the situation that the data sent from the transmitting end to the receiving end each time is the data sampled by the data source at a single time. In this case, for example, but not limited to, the bits of each The number is the same as the number of quantization bits employed by one of the at least one data source. Those skilled in the art will understand that, if the at least one data source each adopts the same quantization number, the attribute information may include only one quantization number for the at least one data source, that is, the same quantization number.
- the attribute information includes the respective quantization bits used by the at least one data source
- the number of bits of each of the plurality of data portions may be the same as the number of bits of quantization employed by one of the at least one data source, such that each data portion DS includes a complete data sample of at least one of the data sources , so that at the receiving end, if some data parts DS are discarded due to verification failure, but other data parts DS are provided to the user due to successful verification, then the user can at least obtain part of the data source. complete data for use.
- the attribute information includes the sampling rate and the number of quantization bits employed by each of the at least one data source.
- each data source transmits one sampling point data every time it is sampled, so for example, for a single microphone array element, the data length of the sampling point transmitted in a single time is equal to the number of quantization bits.
- the resource scheduling time interval should be a positive integer multiple of the sampling time interval. In this way, for a single microphone element, the length of the data sent by it (in bits) Equal to a positive integer multiple of the number of quantization bits.
- the sampling time interval is the inverse of the sampling rate; the resource scheduling time interval may be set by, for example, but not limited to, the physical layer 230 or the MAC layer 222 of the wireless network protocol stack 200 shown in FIG. 2 . It can be understood that the data sampled once can also be sent in multiple times, so that the sampling time interval is a positive integer multiple of the resource scheduling time interval. In this way, for a single microphone element, the quantization bits of the segmented data part DS are equal to a single Positive integer multiple of the data length sent by the microphone element.
- the number of bits of the data part DS may also be different, that is, the original data TB will be transmitted in unequally divided data parts DS.
- the attribute information includes the number of the at least one data source.
- the attribute information on which the segmentation is based becomes simple and straightforward, and no further knowledge of the data properties of the data source is required.
- the number of the plurality of data parts DS may be a positive integer multiple of the number of the at least one data source.
- each data part DS is twice the number of array elements, then each data part DS It accommodates half of the array element data of one of the array elements; the number of DS in the data part can also be 3 times or 4 times the number of array elements, etc., which can be adapted according to needs and network performance.
- the number of data parts DS is 1 times the number of array elements, that is, each data part DS accommodates the array element data of one of the array elements at this time.
- the number of the at least one data source is a positive integer multiple of the number of the plurality of data parts DS.
- the number of the data part DS is 1/2 of the number of array elements, and each data Part of DS can accommodate array element data of two array elements; the number of data part DS can also be 1/3, 1/4, etc., which can be adapted according to needs and network performance.
- the attribute information includes quantity information of the plurality of data parts DS that segment the original data TB. That is, the attribute information may directly include the number of segments, which is used to indicate how many segments the original data TB of at least one data source is divided into.
- segmenting directly based on the number of segments in the attribute information can eliminate the burden of performing operations or logical judgments on parameters such as sampling rate and quantization bits in the attribute information.
- FIG. 4 shows a flowchart of a data transmission method according to a second embodiment of the present application.
- the method 350 shown in FIG. 4 is used for receiving the original data TB, and can be implemented by a receiving end, a receiving device (see FIG. 9 ) or any other suitable device.
- the method 350 includes steps S910-S940.
- each coding block CB includes one data part DS of a plurality of data parts DS and a check code of the data part, and the plurality of data parts DS are obtained by It is obtained by segmenting the original data TB of at least one data source.
- the plurality of coding blocks CB are transmitted by radio from a transmitting end or a transmitting device or the like.
- the data source may be, for example, but not limited to, the microphone array elements in the microphone array 80 of the vehicle cabin 100 , and the like.
- the raw data TB may be, for example, but not limited to, noise data collected by the microphone array elements in the microphone array 80 of the vehicle cabin 100, and the like.
- the check code may include, but is not limited to, a Cyclic Redundancy Check (CRC) code, a parity code, a Hamming code, and the like, for example.
- CRC Cyclic Redundancy Check
- step S920 the data parts DS included in the plurality of encoding blocks CB are checked by using the check codes included in the plurality of encoding blocks CB.
- the verification of the data part DS can be implemented, for example, but not limited to, in the physical layer 230 or the MAC layer 222 of the protocol stack 200 of the wireless network shown in FIG. 2 .
- step S940 at least the data part that has been successfully verified is provided to the user of the original data.
- the user may be, for example, but not limited to, an application for generating anti-noise data to cancel noise in a vehicle cabin, and the like.
- Each data part DS is independently verified, and when the verification is successful, the data part DS is recovered, that is, the information of one or more data sources associated with the data part DS can be recovered, such as including one or more data sources.
- the noise samples of each microphone element are adopted for the data portion DS that can be recovered and the data portion DS that cannot be recovered, respectively: for the data portion DS that can pass the verification, it is continued to transmit as valid information; For the data parts DS that cannot pass the verification, further processing is only performed on these data parts that cannot be recovered, such as optimizing with adjacent sequence data parts; overwriting with previous data parts in the same sequence; or filling with specified bit values; Or even directly discard the data part, etc.
- the data part DS is independently verified, and when the verification is successful, the data part DS is recovered, that is, the information of one or more data sources associated with the data part DS can be recovered, such as including one or more data sources.
- the noise samples of each microphone element are adopted for the data portion DS that can be recovered and
- the verification of some data parts succeeds and the verification of other data parts fails, all data parts of the original data TB are not discarded, but at least the verification is performed. Those data parts that are successful are provided to the user, so that even if some data parts of the original data TB fail to be transmitted, the user can still have data to use, thereby improving the efficiency of data transmission.
- each data part DS is independently checked for each, and when a transmission error occurs in a small range, it is possible to continue to transmit the data segments without errors separately, and the errors of individual bits The impact of the problem on the overall data transfer is minimized.
- step S940 may further include: setting the data part DS that has failed the verification to a specified bit value; performing the verification between the data part DS that has been successfully verified and the data part DS that has been set to the specified bit value splicing to obtain spliced data TB'; and sending the original data to the user in the form of the spliced data TB'.
- the specified bit value may be, for example, but not limited to, all zeros, all ones, or other agreed values, such as default values, and the like.
- the default value may be AFCF (hexadecimal).
- the data part DS successfully recovered and the data part DS replaced by the specified bit value that has not been recovered can still be arranged and recombined according to the transmission order before the CRC check, so that the spliced data TB' can be similar to the original data.
- the data is transmitted in its entirety in terabytes of packets, as before it was fragmented.
- the splicing method can also be to arrange and recombine the successfully recovered data part DS and the data part DS that is not recovered but replaced by the specified bit value according to the sequence of the segments in step S820, so as to facilitate the data analysis. restoration.
- the spliced data TB' When the spliced data TB' is sent to the user, the spliced data TB' not only includes the data part DS that has been successfully recovered, but also includes the data part DS whose specified bit value has been reset due to failure .
- the unsuccessfully restored data part DS When the unsuccessfully restored data part DS is reset to a specified bit value, it can be clearly distinguished from the successfully restored data part DS, because its data characteristics themselves represent its specificity and thus play a clear indication role. And the number of digits of the data packet formed by splicing the data part that has been successfully verified and the data part that has been set to the specified bit value is consistent with the number of digits occupied by the original data of the data source, and each data part used for splicing. DS also has the possibility to keep the original data corresponding to each data source in order.
- step S940 may further include: sending to the user the data part that has been verified successfully and first indication information, wherein the first indication information is used to indicate that the data part that has failed the verification is in the original the corresponding order in the data.
- the data part that fails the CRC check is discarded, and only the data part DS that passes the CRC check and the sequence number of the discarded data part are passed to the user. The sequence number corresponding to the data part and the "failed" data part. This will avoid redundant transmission of invalid content in the verification failed data portion while preserving the available information.
- step S940 may further include: sending to the user a data part that is successfully verified and second indication information, where the second indication information is used to indicate whether there is a data part that fails to be verified.
- the user can only receive the successfully recovered data part DS and know whether there is a transmission error in the current transmission process, without knowing the details such as invalid content and sequence number. This will save the space of the cached data and the judgment time of the conditional statement.
- the checking of the data parts included in the plurality of coding blocks and/or the providing the original data to the user is implemented in the physical layer 230 of the protocol stack 200 of the wireless network of.
- FIG. 5 shows a schematic diagram of a data transmission device according to the first embodiment of the present application.
- the data transmission device 800 shown in FIG. 5 is used for transmitting the original data, and may be located in the transmitting end, the transmitting device (see FIG. 8 ) or any other suitable device.
- the data transmission device 800 includes a first receiving module 810 , a segmenting module 820 , a computing module 830 and a sending module 840 .
- the first receiving module 810 is configured to receive the original data TB and its attribute information from at least one data source.
- the segmentation module 820 is configured to segment the original data TB based on the attribute information to obtain multiple data parts DS, and the multiple data parts DS maintain a corresponding relationship with the at least one data source.
- the calculation module 830 is configured to calculate the respective check codes of the plurality of data parts.
- the sending module 840 is configured to send the original data TB in the form of multiple coding blocks CB, and each coding block CB corresponds to a data portion DS in the multiple data portions DS, including the data portion DS and the corresponding data portion DS. Check code.
- the segmentation module 820 and/or the computing module 830 may be at the physical layer 230 in the access layer protocol stack 200 of the wireless network shown in FIG. 2 .
- the attribute information utilized in the segmentation module 820 includes the number of quantization bits employed by each of the at least one data source.
- the number of bits of each of the plurality of data portions DS is the same as the number of bits of quantization employed by one of the at least one data source.
- the attribute information utilized in the segmentation module 820 includes the sampling rate and the number of quantization bits used by the at least one data source respectively.
- the number of bits of each of the plurality of data portions DS is a positive integer multiple of the number of quantization bits employed by one of the at least one data source or one of the at least one data source
- the number of quantization bits employed is a positive integer multiple of the number of bits in each of the data sections DS.
- the attribute information utilized in the segmentation module 820 includes the number of the at least one data source.
- the number of the plurality of data parts DS is a positive integer multiple of the number of the at least one data source or the number of the at least one data source is the plurality of data parts Positive integer multiple of the number of DS.
- the attribute information utilized in the segmenting module 820 includes quantity information of the plurality of data parts DS that segment the original data.
- FIG. 6 shows a schematic diagram of a data transmission device according to a second embodiment of the present application.
- the data transmission device 900 shown in FIG. 6, for receiving the original data may be located in a receiving end, a receiving device (see FIG. 9) or any other suitable device.
- the data transmission device 900 includes a second receiving module 910 , a checking module 920 , and a providing module 940 .
- the second receiving module 910 is configured to receive a plurality of coding blocks CB, wherein each coding block CB includes one data part DS of the plurality of data parts DS and a check code of the data part, and the plurality of data parts DS are Obtained by segmenting TB of raw data from at least one data source.
- the plurality of coding blocks CB received by the second receiving module 910 of the data transmission device 900 may come from the sending module 840 of the data transmission device 800 as shown in FIG. 5 .
- the verification module 920 is configured to use the verification codes included in the multiple encoding blocks CB to respectively verify the data parts DS included in the multiple encoding blocks CB.
- the providing module 940 is configured to provide at least the successfully verified data part DS to the user of the original data TB.
- the user may connect with the providing module 940 of the data transmission device 900 in this embodiment to receive the original data TB.
- the checking module 920 and/or the providing module 940 are arranged in the physical layer 230 in the access layer protocol stack 200 of the wireless network shown in FIG. 2 .
- the providing module 940 further includes a setting unit 941 , a splicing unit 942 and a sending unit 943 .
- the setting unit 941 is used to set the data part DS that has failed the verification to a specified bit value.
- the splicing unit 942 is configured to splicing the successfully verified data part and the data part DS that has been set to the specified bit value to obtain the spliced data TB'.
- the sending unit 943 is configured to send the original data TB to the user in the form of the concatenated data TB'.
- the providing module 940 is configured to send the data part DS that has been successfully verified and first indication information to the user, wherein the first indication information is used to indicate that the data part DS that has failed the verification is in the corresponding order in the original data.
- the providing module 940 is configured to send to the user a data part DS that has been successfully verified and second indication information, where the second indication information is used to indicate whether there is a data part DS that has failed verification .
- the checking module 920 and/or the providing module 940 are at the physical layer in the access layer protocol stack of the wireless network.
- FIG. 8 shows a schematic diagram of a sending device according to an embodiment of the present application.
- the sending device 8 includes a first communication interface 82 , at least one first processor 83 and at least one first memory 84 .
- the first memory 84 stores program instructions, which when executed by the first processor 83 cause the first processor 83 to execute the data transmission method 300 shown in FIG. 3 .
- the first communication interface 82 is used for communication with other devices.
- the first memory 84 may be a storage unit within the first processor 83, or may be an external storage unit independent of the first processor 83, or may include a storage unit within the first processor 83 and a storage unit associated with the first processor 83. 83 independent external storage unit components.
- the first processor 83 may adopt a central processing unit (central processing unit, CPU).
- the processor may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), off-the-shelf programmable gate arrays (FPGAs) or other Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
- DSPs digital signal processors
- ASICs application specific integrated circuits
- FPGAs off-the-shelf programmable gate arrays
- a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
- the first processor 83 employs one or more integrated circuits for executing relevant program instructions to implement the method in the embodiment of FIG. 3 and various implementations thereof.
- the first memory 84 may include read only memory and random access memory, and provides instructions and data to the first processor 83 .
- a portion of the first processor 83 may also include non-volatile random access memory.
- the first processor 83 may also store device type information.
- the sending device described in this embodiment of the present application may also be referred to as a sending terminal device or a sending terminal.
- the sending terminal may be in various forms, which are not limited in this embodiment of the present application.
- the sending terminal may be an independent device.
- the sending terminal may be respectively integrated into other devices as functional modules or chip devices.
- the transmitting device may be a handheld device, a computing device, a vehicle-mounted device, etc. with a wireless connection function.
- a wireless connection function For example, but not limited to, mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices , wireless terminals in self-driving (self driving), cellular phones, cordless phones, session initiation protocol (SIP) phones, personal digital assistants (PDAs), terminal equipment in 5G networks, etc.
- MIDs mobile internet devices
- VR virtual reality
- AR augmented reality
- cellular phones cellular phones
- cordless phones cordless phones
- SIP session initiation protocol
- PDAs personal digital assistants
- terminal equipment in 5G networks etc.
- the sending device in this embodiment of the present application may be a microphone or a microphone array in a vehicle-mounted device.
- FIG. 9 shows a schematic diagram of a receiving device according to an embodiment of the present application.
- the receiving device 9 includes: a second communication interface 92 , at least one second processor 93 and at least one second memory 94 .
- the second memory 94 stores program instructions, which when executed by the second processor 93 cause the second processor 93 to execute the data transmission method 350 shown in FIG. 4 .
- the second communication interface 92 , the second processor 93 , and the second memory 94 may refer to the foregoing descriptions of the first communication interface 82 , the first processor 83 , and the first memory 84 in the sending device 8 , respectively.
- the second processor 93 executes the second program instructions in the second memory 94 to implement the operation steps of the method of the embodiment of FIG. 4 and various implementations thereof.
- the receiving device described in this embodiment of the present application may also be referred to as a receiving terminal device or a receiving terminal.
- the receiving terminal may be in various forms, which are not limited in this embodiment of the present application.
- the receiving terminals may each be an independent device.
- the sending terminal and the receiving terminal may be respectively integrated into other devices as functional modules or chip devices.
- the receiving device may be a base station, a wireless controller, or may be a relay station, an access point, a wearable device, a user's smart terminal, a tablet computer, a Bluetooth headset, an access device in a 5G network, or a public land mobile that evolves in the future
- the network equipment in the network can also be an intelligent controller integrated or installed on the vehicle, such as electronic control unit (Electronic Control Unit, ECU), domain controller (Domain Controller Unit, DCU) ) Multi-domain Controller (Multi-domain Controller, MDC).
- ECU Electronic Control Unit
- DCU Domain Controller Unit
- MDC Multi-domain Controller
- the receiving device may be a cockpit domain controller.
- the sending device 8 and the receiving device 9 may be integrated in a data transmission system 1, that is, the data transmission system 1 simultaneously includes the sending device shown in FIG. 8 .
- Device 8 and receiving device 9 of FIG. 9 Communication between the receiving device and the sending device may be performed in various manners, which are not limited in this embodiment of the present application.
- a possible implementation manner of communication between the receiving device and the sending device is a wireless manner.
- the wireless manner may be to implement communication through a communication network, and the communication network may be a local area network, or a wide area network switched by a relay device, or includes a local area network and a wide area network.
- the communication network is a local area network
- the communication network can be a near field communication network such as a wifi hotspot network, a wifi P2P network, a Bluetooth network, a zigbee network, or a near field communication (near field communication, NFC) network.
- the communication network may be a third-generation mobile communication technology (3rd-generation wireless telephone technology, 3G) network, a fourth-generation mobile communication technology (the 4th generation mobile communication technology, 4G) network ) network, a fifth-generation mobile communication technology (5th-generation mobile communication technology, 5G) network, a PLMN, or the Internet, etc., which are not limited in this embodiment of the present application.
- the present application also proposes a vehicle 1000 including the data transmission system 1 of FIG. 10 .
- the vehicle 1000 further includes a speaker 40, wherein the data
- the transmitting device 8 in the transmission system 1 may be a microphone array 80
- the microphone array 80 further includes at least one microphone as the data source for sampling noise signals in the vehicle 1 respectively.
- the receiving device 9 in the data transmission system 1 may be a CDC 90, and the CDC 90 is further configured to generate a reverse noise signal using at least the successfully verified data part DS, and provide the generated reverse noise signal to the CDC 90.
- the speaker 40 plays.
- the microphone array 80 can be integrated with the transmitting device 8 as one product, and alternatively, the vehicle-mounted microphone array 80 can also be connected to the transmitting device 8 through a separate communication line.
- the CDC 90 may be integrated with the receiving device 90 as one product, or alternatively, the CDC 90 may be connected to the data transmission device 900 through a separate communication device.
- each microphone element in the microphone array 80 collects the noise information of the vehicle, and the microphone array aggregates all the noise information and sends it to the CDC 90 to generate an anti-noise signal to cancel the noise of the vehicle.
- steps S1202-S1220 may be performed on the side of the microphone array 80 .
- each microphone element in the microphone array 80 collects noise information of the vehicle at a certain sampling rate and converts the collected noise information into a noise sample value in digital form with a certain quantization bit.
- the sampling rate and quantization number of each microphone element in the microphone array 80 may be the same or different, for example.
- the microphone array 80 generates noise including each microphone element at one of the layers above the data link layer in the OSI transmission model (eg, network layer, transport layer, session layer, expression layer or application layer, etc.)
- the service data TB of the sampled value and the attribute information of the service data are transmitted, and the generated service data and its attribute information are transmitted to the link control layer 221 of the data link layer 220 in the access layer protocol stack 200 .
- the service data may be in the form of data packets, for example.
- the attribute information may include, for example, the sampling rate fc of each microphone element in the microphone array 80, such as 48Khz, and 96khz, 128khz, etc. and quantization bits b, such as 16bit, 24bit, 32bit and 48bit, etc.
- the attribute information may include, for example, the number of microphone elements in the microphone array 80 .
- the attribute information may include the number of segments of the service data.
- the attribute information may be obtained from a management entity via, for example, an upper layer of the data link layer 220 of the access layer protocol stack architecture 200 in the form of inter-layer primitives.
- the attribute information may include, in addition to the sampling rate fc of one or more microphones for noise, and/or the number of quantization bits b; it may also include the number or name of each microphone or each microphone The number of bytes occupied by the noise data, etc.
- step S1206 the link control layer 221 of the microphone array 80 encrypts the received service data TB, and sends the encrypted service data TB and its attribute information to the MAC layer in the data link layer 220 of the microphone array 80 222.
- step S1206 is optional, that is, after receiving the service data and its attribute information, the link control layer 221 of the microphone array 80 can encrypt the service data TB without encrypting the service data TB.
- the data TB and its attribute information are sent to the MAC layer 222 in the data link layer 220 .
- step S1208 after receiving the service data TB and its attribute information from the link control layer, the MAC layer 222 does not perform any processing on the service data TB and its attribute information. to the physical layer 230 of the microphone array 80 .
- the MAC layer 230 may, for example, but not limited to, transmit the attribute information to the physical layer in the form of inter-layer primitives through an inter-layer interface.
- the main function of the data link layer 220 is to ensure reliable data transmission on the physical link.
- data or instructions are encapsulated into specific frames that can be transmitted by the physical layer.
- the data link layer also includes functions such as access control, resource management, data segmentation, concatenation, error correction, data encryption and decryption, etc.
- the main function of the physical layer 230 is to provide physical connections for the data link layer by using the transmission medium , to realize the transparent transmission of the bit stream (or simply transparent transmission).
- the physical layer 230 performs channel coding or decoding to ensure the reliability of data transmission.
- the link control layer 221 is responsible for transmission mode management, including whether to perform ARQ (Automatic Repeat-reQuest) status report, whether to segment the data, whether to add packet headers, etc.; optionally, it can also encrypt and decrypt the data.
- the MAC layer 222 is responsible for carrying out data encapsulation and adding packet headers according to fixed storage space resources, and generating the protocol data unit (PDU, Protocol Data Unit) of the MAC layer 222, namely the MAC PDU.
- PDU Protocol Data Unit
- the protocol data unit namely the MAC PDU.
- the previous MAC layer 222 adds a CRC check code to the entire encapsulated data TB, and then transmits it down to the physical layer for the receiving end to check the original data TB.
- step S1210 the physical layer 230 of the microphone array 80 segments the service data TB according to the attribute information of the received service data TB to obtain a plurality of data parts DS.
- each array element in the microphone array may use the same sampling rate fc and the same quantization number b, or may use different sampling rates fc and the same quantization number b.
- the attribute information used for segmenting the original data TB can be determined by pre-operation or logical judgment.
- the attribute information may also include any preset segmentation rule for the original data TB, for example, the segmentation rule for the original data TB of at least one data source may be equal or unequal division , when the segmentation is performed in equal parts, the number of bits of each data part DS is equal, as described below based on the implementation of one of the respective quantization bits of multiple data sources to equally divide or based on multiple data sources The implementation of the uniform quantization bit to equal division. Of course, it is also possible to divide equally according to any preset number of digits or any number of segments. Of course, it can be understood that when the amount of resources acquired by the physical layer is not the same size, the physical layer can also transmit the TB in unequal divisions, thereby maximizing the utilization rate of the amount of physical resources.
- Dividing the original data of at least one data source equalizes the size of each data part, which facilitates the storage and identification of the data part, provides neat matching during resource scheduling, and maintains transmission stability.
- the attribute information will include multiple sampling rates and quantization bits.
- the number of bits of the data part DS can be selected to be one of 16bit and 24bit.
- the quantization bits b of the data of the 1st to 3rd microphones are 24 bits
- the quantization bits of the data of the 4th to 6th microphones are 32 bits
- the quantization bits b of the data of the 7th and 8th microphones are 48 bits.
- the number of bits of the segmented data part DS can be selected to be one of 16bit, 32bit and 48bit. Specifically, how to determine the number of bits of the DS may depend on the algorithm used in the implementation.
- the number of bits of each data part DS that is divided equally is 32 bits, which is equivalent to the array element data of every two array elements forming a data part DS; or the original data TB can also be divided into 16 equal parts, that is, the data part DS
- the number of DS is 16, and the number of bits of each data part DS divided equally is 8 bits, which is equivalent to the array element data of one array element carried by every two data parts DS.
- step S1212 the physical layer 230 of the microphone array 80 calculates a CRC code for each data part DS to obtain a plurality of coding blocks CB.
- the multiple array elements generally use the same sampling rate fc and quantization bit number b. Assuming that the number of array elements in the attribute information transmitted by the MAC layer 222 is K, the physical layer 230 divides the original data TB into K equally divided data segments, and adds a CRC check code to each equally divided data part at the same time , then at this time, each equally divided data part corresponds to the array element data of one array element;
- the physical layer 230 may also divide the original data TB into M equal parts, for example, every two array element data forms one data part.
- step S1214 each data part DS and CRC is channel-coded for transmission on the scheduled physical resources.
- step S1216 multiple coding blocks CB are sent to the CDC through different physical resources.
- the CDC 90 side as the receiving end, also uploads the received data layer by layer through the architecture of the access layer protocol stack 200 of the wireless network in FIG. 2 until the anti-noise data is calculated by using the noise information carried by the data.
- the CDC 90 performs the following steps S1218-S1234.
- step S1218 the physical layer 230 of the CDC 90 receives a plurality of coding blocks CB from the microphone array 80 side.
- step S1220 the physical layer 230 of the CDC 90 performs channel decoding on the coded blocks CB from different physical resources.
- step S1222 the physical layer 230 of the CDC 90 uses the respective CDC codes of the plurality of coding blocks CB to perform CRC check on the data parts DS respectively.
- step S1224 the physical layer 230 of the CDC 90 recovers the data part DS for the coded block whose CRC check is successful.
- the successfully recovered data part DS for the vehicle active noise reduction service, means that the CDC at the receiving end has obtained the noise sampling values of the associated array elements of the microphone array at the transmitting end.
- the physical layer 230 of the CDC 90 will at least submit the recovered data part DS upward.
- step S1225 the physical layer 230 of the CDC 90 resets the data part DS to a specified bit value, such as all 0s or all 1s, for the encoded block whose CRC check is unsuccessful; or It can also be the value agreed by other protocols.
- step S1226 the physical layer 230 of the CDC 90 concatenates the data part DS recovered in step S1224 and the unrecovered data part DS whose specified bit value was reset in step S1225 to obtain concatenated data TB'.
- step S1228 the physical layer 230 of the CDC 90 forwards the spliced data TB' to the user, such as the MAC layer 222 of the CDC 90.
- the physical layer 230 of the CDC 90 instead of executing the above steps S1225, S1226 and S1228, but executing step S1227, the physical layer 230 of the CDC 90 only transmits the successfully recovered data part DS to the MAC layer 222 of the CDC 90, and sends the first An indication message for indicating the relative sequence number of the data part DS that cannot be recovered to the MAC layer 222 .
- the upper-layer user can locate the position of the data segment vacated due to discarding accordingly, so that it is convenient for the user to selectively or separately further the data segment according to its function and purpose.
- step S1227 the further processing here may also include refilling the data segment corresponding to the sequence number with a specified bit value, and refilling the data part DS for which the CRC check is successful and the data part DS that has been set to the specified bit value.
- the data part DS is spliced and then sent, but the execution subject here can no longer be undertaken by the physical layer 230 in steps S1225, S1226, and S1228, but a higher-level user.
- step S1229 the physical layer 230 of the CDC 90 also submits second indication information to the MAC layer 222 of the CDC 90 for indicating whether segment information that cannot be recovered is included.
- first feasible manner and the second feasible manner can also be arbitrarily combined with the third feasible manner.
- step S1230 the MAC layer 222 of the CDC 90 directly transparently transmits the data from the physical layer 230 of the CDC 90 to the link control layer 221 of the CDC 90.
- step S1206 When the optional step S1206 is performed by the microphone array 80, the CDC 90 performs step S1232, wherein the link control layer 221 of the CDC 90 decrypts the data transparently transmitted by the MAC layer 222 of the CDC 90, and then continues to decrypt the decrypted data. Data is passed to upper layers.
- step 1234 the data processing unit at the upper layer of the CDC 90 converts the received data representing the noise information to generate an inverse noise signal through, for example, digital/analog conversion, and sends it to a speaker (not shown in the figure) for use in play.
- the entire data TB is not discarded, but at least the successfully recovered data part DS is delivered to the upper layer, thereby improving the efficiency of the process.
- the effectiveness of information transmission increases the amount of information and reduces data loss.
- the availability of information of each element in the microphone or microphone array can be guaranteed.
- the user who uses the original data, its meaning should be understood broadly, for example, the user may not only include one or more layers in the interconnection model of the wireless network system, for example, in the access layer protocol stack 5
- the original data MAC layer 20 for transparent transmission or the link control layer 21 for decrypting the original data may also include any base station, such as a controller, for obtaining the signal of the data source according to the original data and users, etc., such as the device that converts the original data into noise sampling values and further calculates the reverse noise signal in the active noise reduction service above, such as the CDC 90.
- Even the subject who receives the sent raw data and further processes it can be called the user of the raw data.
- the data link layer 220 may be an open system interconnection (OSI, Open System Interconnect Reference Model) any layer or layers in the transmission model of the reference model (for example, network layer, transport layer, session layer, expression layer, application layer), which is not limited in this application.
- OSI Open System Interconnect Reference Model
- any layer or layers in the transmission model of the reference model for example, network layer, transport layer, session layer, expression layer, application layer, which is not limited in this application.
- the data transmission system 1 of the vehicle 1000 shown in FIG. 10 may all be located in the smart cockpit 100 of FIG. 1 , but the need for distributed arrangement should not be excluded.
- the microphone array 80 may be located outside the cockpit near the chassis.
- the disclosed system, apparatus and method may be implemented in other manners.
- the apparatus embodiments described above are only illustrative.
- the division of the units is only a logical function division. In actual implementation, there may be other division methods.
- multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
- the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
- the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
- each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
- the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
- the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
- the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
- the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .
- Embodiments of the present application further provide a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, is used to execute a method for generating diverse problems, and the method includes the methods described in the foregoing embodiments. at least one of the options.
- the computer storage medium of the embodiments of the present application may adopt any combination of one or more computer-readable media.
- the computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium.
- the computer readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or any combination of the above. More specific examples (a non-exhaustive list) of computer readable storage media include: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read only memory (ROM), Erasable programmable read only memory (EPROM or flash memory), optical fiber, portable compact disk read only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above.
- a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.
- a computer-readable signal medium may include a propagated data signal in baseband or as part of a carrier wave, with computer-readable program code embodied thereon. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the foregoing.
- a computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device .
- Program code embodied on a computer readable medium may be transmitted using any suitable medium including, but not limited to, wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
- Computer program code for carrying out the operations of the present application may be written in one or more programming languages, including object-oriented programming languages—such as Java, Smalltalk, C++, but also conventional Procedural programming language - such as the "C" language or similar programming language.
- the program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer, or entirely on the remote computer or server.
- the remote computer may be connected to the user's computer through any kind of network, including a local area network (LAN) or wide area network (WAN), or may be connected to an external computer (eg, through the Internet using an Internet service provider) connect).
- LAN local area network
- WAN wide area network
- Internet service provider an external computer
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Abstract
Description
Claims (33)
- 一种数据传输方法,其特征在于,所述数据传输方法用于传输原数据,包括:接收来自至少一个数据源的原数据及其属性信息;基于所述属性信息,对所述原数据进行分段以得到多个数据部分;根据所述多个数据部分的每一个来分别计算所述多个数据部分各自的校验码;以及以多个编码块的方式发送所述原数据,每一个编码块分别与所述多个数据部分中的一个数据部分对应,包括该数据部分和对应的校验码。
- 根据权利要求1所述的数据传输方法,其特征在于,所述对所述原数据进行分段和所述计算所述多个数据部分各自的校验码是在无线网络的接入层协议栈中的物理层实现的。
- 根据权利要求1-2中任一项所述的数据传输方法,其特征在于,所述属性信息包括所述至少一个数据源各自采用的量化位数。
- 根据权利要求1-2中任一项所述的数据传输方法,其特征在于,所述属性信息包括所述至少一个数据源各自采用的采样率和量化位数。
- 根据权利要求1-2中任一项所述的数据传输方法,其特征在于,所述属性信息包括所述至少一个数据源的数量。
- 根据权利要求1-2中任一项所述的数据传输方法,其特征在于,所述属性信息包括对所述原数据进行分段的所述多个数据部分的数量信息。
- 根据权利要求1-6任一项所述的数据传输方法,其特征在于,所述至少一个数据源是车载麦克风阵列中的麦克风阵元;以及所述原数据是所述麦克风阵元收集的噪声数据。
- 一种数据传输方法,其特征在于,所述数据传输方法用于接收原数据,包括:接收多个编码块,其中,每一个编码块包括多个数据部分的其中一个数据部分和该数据部分的校验码,所述多个数据部分是通过对来自至少一个数据源的原数据进行分段而得到的,所述校验码是根据所述多个数据部分的每一个来分别计算的;利用所述多个编码块包括的校验码,对所述多个编码块所包括的数据部分进行校验;以及至少将校验成功的数据部分,提供给所述原数据的使用者。
- 根据权利要求8所述的数据传输方法,其特征在于,所述提供给所述原数据的使用者包括:将校验失败的数据部分设置为指定比特值;将所述校验成功的数据部分和已设置为所述指定比特值的数据部分进行拼接,以得到拼接数据;以及以所述拼接数据的方式向所述使用者发送所述原数据。
- 根据权利要求9所述的数据传输方法,其特征在于,所述提供给所述原数据的使用者包括:向所述使用者发送所述校验成功的数据部分和第一指示信息,其中所述第一指示信息用于指示校验失败的数据部分在所述原数据中的相应顺序。
- 根据权利要求8-10中任一项所述的数据传输方法,其特征在于,所述提供给所述原数据的使用者包括:向所述使用者发送所述校验成功的数据部分和第二指示信息,所述第二指示信息用于指示是否存在校验失败的数据部分。
- 根据权利要求8-11中任一项所述的数据传输方法,其特征在于,所述对所述多个编码块所包括的数据部分进行校验和所述提供给所述原数据的使用者是在无线网络的接入层协议栈中的物理层实现的。
- 根据权利要求8至12任一项所述的数据传输方法,其特征在于,所述至少一个数据源是车载麦克风阵列中的麦克风阵元;以及所述原数据是所述麦克风阵元收集的噪声数据。
- 一种数据传输设备,其特征在于,所述数据传输设备用于传输原数据,包括:接收模块,用于接收来自至少一个数据源的原数据及其属性信息;分段模块,用于基于所述属性信息,对所述原数据进行分段以得到多个数据部分;计算模块,用于根据所述多个数据部分的每一个来分别计算所述多个数据部分各自的校验码,以及发送模块,用于以多个编码块的方式发送所述原数据,每一个编码块分别与所述多个数据部分中的一个数据部分对应,包括该数据部分和对应的校验码。
- 根据权利要求14所述的数据传输设备,其特征在于:所述分段模块和所述计算模块在无线网络的接入层协议栈中的物理层。
- 根据权利要求14或15所述的数据传输设备,其特征在于:所述属性信息包括所述至少一个数据源各自采用的量化位数。
- 根据权利要求14或15所述的数据传输设备,其特征在于:所述属性信息包括所述至少一个数据源各自采用的采样率和量化位数。
- 根据权利要求14或15所述的数据传输设备,其特征在于,所述属性信息包括所述至少一个数据源的数量。
- 根据权利要求14或15所述的数据传输设备,其特征在于,所述属性信息包括对所述原数据进行分段的所述多个数据部分的数量信息。
- 根据权利要求14-19任一项所述的数据传输设备,其特征在于,所述至少一个数据源是车载麦克风阵列中的麦克风阵元;以及所述原数据是所述麦克风阵元收集的噪声数据。
- 一种数据传输设备,其特征在于,所述数据传输设备用于接收原数据,包括:接收模块,用于接收多个编码块,其中,每一个编码块包括多个数据部分的其中一个数据部分和该数据部分的校验码,所述多个数据部分是通过对来自至少一个数据源的原数据进行分段而得到的,所述校验码是根据所述多个数据部分的每一个来分别计算的;校验模块,用于利用所述多个编码块包括的校验码,对所述多个编码块所包括的数据部分进行校验;以及提供模块,用于至少将校验成功的数据部分,提供给所述原数据的使用者。
- 根据权利要求21所述的数据传输设备,其特征在于,所述提供模块还包括:设置单元,用于将校验失败的数据部分设置为指定比特值;拼接单元,用于将所述校验成功的数据部分和已设置为所述指定比特值的数据部分进行拼接,以得到拼接数据;以及发送单元,用于以所述拼接数据的方式向所述使用者发送所述原数据。
- 根据权利要求21所述的数据传输设备,其特征在于,所述提供模块用于向所述使用者发送所述校验成功的数据部分和第一指示信息,其中所述第一指示信息用于指示校验失败的数据部分在所述原数据中的相应顺序。
- 根据权利要求21-23中任一项所述的数据传输设备,其特征在于,所述提供模块用于向所述使用者发送所述校验成功的数据部分和第二指示信息,所述第二指示信息用于指示是否存在校验失败的数据部分。
- 根据权利要求21-23中任一项所述的数据传输设备,其特征在于,所述校验模块和所述提供模块在无线网络的接入层协议栈中的物理层。
- 根据权利要求21-25中任一项所述的数据传输设备,其特征在于,所述至少一个数据源是车载麦克风阵列中的麦克风阵元;以及所述原数据是所述麦克风阵元收集的噪声数据。
- 一种发送设备,其特征在于,包括:第一通信接口,其用于与其他设备之间进行通信;至少一个第一处理器;以及至少一个第一存储器,所述至少一个第一存储器存储有第一程序指令,所述第一程序指令当被所述至少一个第一处理器执行时使得所述至少一个第一处理器执行权利要求1-7任一项所述的方法。
- 根据权利要求27所述的发送设备,其特征在于,所述发送设备是车载麦克风阵列,所述麦克风阵列还包括作为所述数据源的至少一个麦克风阵元,用于对座舱内的噪声信号采样。
- 一种接收设备,其特征在于,包括:第二通信接口,用于与其他设备之间进行通信;至少一个第二处理器;以及至少一个第二存储器,所述至少一个第二存储器存储有第二程序指令,所述第二程序指令当被所述至少一个第二处理器执行时使得所述至少一个第二处理器执行权利要求8-13任一项所述的方法。
- 根据权利要求29所述的接收设备,其特征在于,所述接收设备是座舱域控制器,所述座舱域控制器还用于至少利用所述校验成功的数据部分来生成反向噪声信号。
- 一种数据传输系统,其特征在于,包括权利要求27或28所述的发送设备;以及权利要求29或30所述的接收设备。
- 一种计算机可读存储介质,其上存储有程序指令,其特征在于,所述程序指令当被计算机执行时使得所述计算机执行权利要求1-13任一项所述的方法。
- 一种计算机程序,其特征在于,其包括有程序指令,所述程序指令当被计算机执行时使得所述计算机执行权利要求1-13中任一项所述的方法。
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CN115688686A (zh) * | 2022-09-02 | 2023-02-03 | 中国人民解放军92493部队试验训练总体研究所 | 一种lvc资源接入校验方法及设备 |
CN115942376A (zh) * | 2023-03-09 | 2023-04-07 | 中法渤海地质服务有限公司 | 一种井场信息远程传输方法和传输系统 |
CN117614731A (zh) * | 2023-12-11 | 2024-02-27 | 杭州广安汽车电器有限公司 | 基于云计算平台的车辆空调数据安全传输方法 |
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CN114362887A (zh) * | 2022-01-11 | 2022-04-15 | 北京梧桐车联科技有限责任公司 | 数据发送、数据接收方法、装置、设备及存储介质 |
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Cited By (5)
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CN115688686A (zh) * | 2022-09-02 | 2023-02-03 | 中国人民解放军92493部队试验训练总体研究所 | 一种lvc资源接入校验方法及设备 |
CN115688686B (zh) * | 2022-09-02 | 2024-01-12 | 中国人民解放军92493部队试验训练总体研究所 | 一种lvc资源接入校验方法及设备 |
CN115942376A (zh) * | 2023-03-09 | 2023-04-07 | 中法渤海地质服务有限公司 | 一种井场信息远程传输方法和传输系统 |
CN117614731A (zh) * | 2023-12-11 | 2024-02-27 | 杭州广安汽车电器有限公司 | 基于云计算平台的车辆空调数据安全传输方法 |
CN117614731B (zh) * | 2023-12-11 | 2024-06-04 | 杭州广安汽车电器有限公司 | 基于云计算平台的车辆空调数据安全传输方法 |
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EP4254404A1 (en) | 2023-10-04 |
EP4254404A4 (en) | 2024-04-17 |
CN112655243B (zh) | 2022-10-28 |
CN112655243A (zh) | 2021-04-13 |
US20230327802A1 (en) | 2023-10-12 |
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