WO2018095181A1

WO2018095181A1 - Data transmission method and device

Info

Publication number: WO2018095181A1
Application number: PCT/CN2017/107600
Authority: WO
Inventors: 李东声
Original assignee: 天地融科技股份有限公司
Priority date: 2016-11-24
Filing date: 2017-10-25
Publication date: 2018-05-31
Also published as: CN107241161A; CN107241161B

Abstract

The present invention provides a data transmission method and device. The method comprises: acquiring a bit sequence of first data to be sent, the bit sequence of the first data to be sent at least comprising: data to be transmitted, and the data to be transmitted at least comprising a locally supported baud rate parameter; acquiring, according to the bit sequence of the first data to be sent, a waveform sequence corresponding to the bit in the bit sequence; and continuously sending, according to the currently used baud rate, the waveform sequence corresponding to the bits in the bit sequence, the duration time of the waveform sequence being inversely proportional to the currently used baud rate. The success rate of data transmission can be improved through the present invention.

Description

Data transmission method and device

Cross-reference to related applications

The present application is based on the Chinese Patent Application No. 201611051707.0, filed on November 24, 2016, the disclosure of which is the disclosure of This application is hereby incorporated by reference.

Technical field

The present invention relates to the field of electronic technologies, and in particular, to a data transmission method and apparatus.

Background technique

With the development and improvement of communication technology, the use of communication in life and work has become quite popular, and at the same time, higher and higher requirements are put forward for the reliability and transmission efficiency of signal transmission and reception in communication. In the existing communication mode, the communication parties generally use the previously negotiated baud rate for data interaction, thereby ensuring the correct transmission of data. However, based on the baud rate previously negotiated for data transmission, the communication baud rate parameter used by both communicating parties can only be a fixed value, which cannot be changed according to the communication environment, and when the communication parties perform data interaction with other terminals. The communication may fail due to the possibility of incompatibility with the communication baud rate of other terminals.

Summary of the invention

The present invention is directed to solving the above problems.

In order to achieve the above object, the technical solution of the present invention is specifically implemented as follows:

A main object of the present invention is to provide a data transmission method, including: acquiring a bit sequence of the first data to be transmitted, wherein the bit sequence of the first data to be transmitted includes at least: data to be transmitted, and the data to be transmitted is at least Include: a locally supported baud rate parameter; acquiring a waveform sequence corresponding to a bit in the bit sequence according to a bit sequence of the first to-be-sent data, wherein the first data bit is represented by the first waveform sequence, and the second waveform is The sequence or third waveform sequence represents a second data bit, the first data bit being one of bit 1 and bit 0, the second data bit being the other of bit 1 and bit 0, When there are at least two consecutive bits in the bit sequence as the second data bit, a waveform sequence corresponding to the first bit of the at least two consecutive bits is the second waveform sequence, the second bit and subsequent The waveform sequence corresponding to the bit is the third waveform sequence; wherein the characteristics of the waveform sequence include: duration of the first waveform sequence, the second The duration of the waveform sequence and the duration of the third waveform sequence are the same, the transmission duration is inversely proportional to the baud rate of the waveform sequence, and the first waveform sequence is high Starting at a low level and occurring during the duration of the transmission, wherein the total duration of the low level occurring in the first waveform sequence during the transmission duration does not follow the baud rate of the waveform sequence Varying, the second waveform sequence continues for a high level during the transmission duration, the third waveform sequence begins with a low level and ends with a high level, and the third waveform sequence appears The total duration of the low level during the duration of the transmission does not change with the change of the baud rate of the waveform sequence; the waveform corresponding to the bit in the bit sequence is continuously transmitted according to the currently used baud rate. A sequence wherein the duration of the waveform sequence is inversely proportional to the currently used baud rate.

Another main object of the present invention is to provide a data transmission apparatus, including: a first acquisition module, configured to acquire a bit sequence of the first data to be transmitted, where the bit sequence of the first data to be transmitted includes at least: Transmitting data, the data to be transmitted includes: a locally supported baud rate parameter; and a second acquiring module, configured to acquire a waveform sequence corresponding to a bit in the bit sequence according to a bit sequence of the first to-be-sent data, where Representing a first data bit in a first waveform sequence, and a second data bit in a second waveform sequence or a third waveform sequence, the first data bit being one of bit 1 and bit 0, the second data bit For the other of the bit 1 and the bit 0, when there are at least two consecutive bits in the bit sequence being the second data bit, a waveform corresponding to the first bit of the at least two consecutive bits The sequence is the second waveform sequence, and the waveform sequence corresponding to the second bit and the subsequent bit is the third waveform sequence; wherein the feature sequence of the waveform sequence The duration of the first waveform sequence, the duration of the second waveform sequence, and the duration of the third waveform sequence are the same, and the transmission duration is inversely proportional to the baud rate of the waveform sequence. And the first waveform sequence starts at a high level and exhibits a low level during the transmission duration, wherein a low level occurring in the first waveform sequence occupies the transmission duration The total duration does not vary with a change in the baud rate of the sequence of waveforms, the second sequence of waveforms continuing at a high level for the duration of the transmission, the third sequence of waveforms starting at a low level and at a high level Ending, and the total duration of the low level occurring in the third waveform sequence during the transmission duration does not vary with the baud rate of the waveform sequence; the first transmitting module is configured to follow the current The baud rate used continuously transmits a sequence of waveforms corresponding to the bits in the sequence of bits, wherein the duration of the sequence of waveforms is inversely proportional to the currently used baud rate.

According to the technical solution provided by the present invention, the local end sends the locally supported baud rate parameter to the peer end in the bit sequence of the first data to be sent, so that the local end and the opposite end can adopt multiple baud rates. To perform data exchange, you only need to include the locally supported baud rate parameter in the data to be sent on the local end, and the peer can obtain the baud rate supported by the local end, and then select the baud rate supported by the local end and the opposite end. Data transmission increases the success rate of data transmission.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention, In the field For the ordinary technicians, other drawings can be obtained based on these drawings without any creative work.

FIG. 1 is a flowchart of a data transmission method according to an embodiment of the present invention;

2 is a schematic diagram of a frame format of a data frame according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of waveforms of three first waveform sequences according to an embodiment of the present invention; FIG.

4 is a schematic waveform diagram of a second waveform sequence according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of waveforms of three third waveform sequences according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic diagram of determining a data frame header according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of waveforms corresponding to a bit sequence of first to-be-sent data according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The invention will now be described in detail in conjunction with the drawings and embodiments.

Example 1

The present embodiment provides a data transmission method. In this embodiment, two devices that are in communication can be classified into a master device and a slave device. For example, the master device can be a mobile terminal such as a PC or a mobile phone, and the card reader, and the slave device can be a USB device. , electronic signature device (such as ICBC U-Shield, ABC Key), smart card, after the master device and the slave device are electrically connected, the slave device can take power from the master device, and the master device can be a slave device while communicating with the slave device. Power supply, in the silent state, the port connected between the master device and the slave device maintains a high level, and the master device can supply power to the slave device through the high-level master device, and both the master device and the slave device can perform data by controlling the level change of the output of the port. Send and detect the level change of the port input for data reception. In the method provided in this embodiment, before the data is transmitted between the local end and the opposite end, the baud rate parameter supported by the local end may be notified in the process of transmitting data between the local end and the opposite end, so that the peer end is enabled. The baud rate supported by the local end can be used for data transmission, so that the local end can communicate with the peer end, and the success rate of communication between the local end and the opposite end is improved.

FIG. 1 is a flowchart of a data transmission method according to an embodiment. As shown in FIG. 1, the method mainly includes the following steps S101 to S103.

Step S101, acquiring a bit sequence of the first data to be transmitted;

In this embodiment, in order to enable the peer end to obtain the baud rate parameter locally supported by the local end, the bit sequence of the first data to be transmitted includes at least data to be transmitted, and the data to be transmitted includes at least: a locally supported baud rate parameter. .

In an optional implementation of the embodiment of the present invention, the bit sequence of the first data to be transmitted may be a compiled bit string, and the bit string carries a locally supported baud rate parameter.

In an optional implementation of the embodiment of the present invention, the bit sequence of the first data to be sent may be a data frame, and the frame format of the data frame may adopt the structure shown in FIG. 2, and one data frame may include: Start of Frame (SOF), transmission data (Byte ₀ , Byte ₁ ... Byte _n-1 , Byte _n ) (in the data frame corresponding to the bit sequence of the first data to be transmitted, the transmission data includes the present The baud rate parameter supported by the local end and the end of frame (EOF), wherein the data frame header SOF is a waveform sequence corresponding to the agreed bit sequence of the communication parties, and the peer end can be Recognizing that a data frame is currently received, and can determine the starting position (or time) of the data to be transmitted in the received data frame. In addition, the data frame header SOF can also indicate the baud rate of the data transmitted by the local end, by analyzing the data frame. The head-to-end can obtain the baud rate of the data transmitted by the local end, and use the baud rate to parse the received data; the EOF of the data frame is also a waveform sequence agreed by the communication parties, through the end of the data frame, the opposite end Do data reception ends, the data frame can be provided to distinguish the EOF waveform of the normal sequence of data to be transmitted and the data corresponding to the header so as to identify the end of a data frame EOF.

As an optional implementation manner, the first byte in the transmission data, that is, Byte _0, may be used to identify the packet type. For example, Byte ₀ is 8 bits, and the definition is as follows:

Bit7Bit7	Bit[6:4]Bit[6:4]	Bit[3:0]Bit[3:0]
Device_typeDevice_type	RevRev	Packet_typePacket_type

Device_type represents the device type of the message initiator. For example, 1 represents the master device, and 0 represents the slave device. This facilitates subsequent analysis tools to distinguish whether the packet is sent by the master device or sent from the device. Rev is the default data, and Packet_type represents the packet type. For example, 0001B indicates the ATR packet, and the ATR packet can be used as the parameter to obtain the packet. The peer receives the ATR packet and returns the corresponding ATR packet. For example, 0010B indicates an ACK response message, that is, a response message indicating that the data is successfully received. For example, 0011B indicates a NAK message, that is, a response message indicating that the device is not ready (or data reception failure), for example, in the data. The receiving end returns a NAK packet to the local end. For example, 0100B indicates a PKT packet, that is, the packet is a normal data packet. Therefore, the packet type can be distinguished. If the packet is the indication information or the normal data, the peer can respond accordingly after receiving the corresponding type of packet. As an optional implementation manner, the last two bytes of the data to be transmitted, Byte _n-1 and Byte _n, can be used as a CRC redundancy check bit, and the bit sequence of the received data frame can be used to check the bit sequence of the received data frame. Check to check or verify that the received data has an error.

In this embodiment, due to the locally supported baud rate parameter of the first to-be-sent data transmission, the value of the Packet_type is 0001B in the data frame corresponding to the bit sequence of the first to-be-sent data, indicating that the data frame is an ATR. The packet can obtain the baud rate parameter locally supported by the local end from the data frame according to the indication.

In this embodiment, the data is transmitted between the local end and the opposite end through a waveform sequence, and the baud rate parameter locally supported by the local end is used to indicate that the local end uses the transmission data when transmitting data (including receiving and transmitting data). The baud rate supported by the waveform sequence. The waveform sequence in this embodiment will be described below.

In this embodiment, the first data bit is represented by a first waveform sequence, and the second data bit is represented by a second waveform sequence or a third waveform sequence, the first data bit being one of bit 1 and bit 0. The second data bit is the other of the bit 1 and bit 0.

In this embodiment, the first waveform sequence, the second waveform sequence, and the third waveform sequence are specifically characterized in that the durations of the first waveform sequence, the second waveform sequence, and the third waveform sequence are the same, and the transmission duration is The baud rate of the waveform sequence is inversely proportional, and the first waveform sequence starts at a high level and exhibits a low level during the transmission duration, wherein the low frequency occurring in the first waveform sequence The total duration occupied by the duration of the transmission does not vary with a change in the baud rate of the sequence of waveforms, the second sequence of waveforms continuing a high level for the duration of the transmission, the third waveform The sequence begins with a low level and ends with a high level, and the total duration of the low level occurring in the third waveform sequence for the duration of the transmission does not vary with the baud rate of the waveform sequence. Variety. In this embodiment, the durations of different waveform sequences are the same, that is, one bit is transmitted by T, and the embodiment transmits one bit in a manner that requires different time intervals to transmit one bit value in the prior art. The bit takes less time and, therefore, the coding efficiency is higher, reducing the cost and burden of the local and the peer.

In this embodiment, the total duration of the low level occurring in the first waveform sequence during the transmission duration does not change with the change of the baud rate of the transmission waveform sequence; and/or, the third waveform sequence appears. The total duration of the low level for the duration of the transmission does not change with the baud rate of the transmitted waveform sequence. For example, the duration of the low level in the first waveform sequence and the third waveform sequence may be preset to a fixed duration, and the baud rate of the data frame transmitted by the master and slave devices may be changed, such that the low level accounts for the transmission duration. The air ratio is changing, not a fixed ratio. For example, the duration of the low level is fixed at 10 ns. When the master device transmits the waveform sequence at a baud rate of 50 Mbs, that is, a transmission duration of 20 ns, the duration of the low level accounts for 50% of the transmission duration, that is, from The power take-off efficiency of the device is 50%; when the master device transmits the waveform sequence at a baud rate of 25 Mbs, that is, a transmission duration of 40 ns, the duration of the low level accounts for 25% of the transmission duration, that is, the slave device takes The electrical efficiency is 75%. It can be seen that when the duration of the low level is fixed, the total duration of the low level during the transmission duration has no linear relationship with the baud rate, that is, the baud rate does not change with the transmission waveform sequence. However, the baud rate can be selected according to the actual situation, so that the interface of the master and slave devices is kept at a high level for as long as possible, thereby further improving the power supply efficiency in the two-wire communication.

In an optional implementation of the embodiment of the present invention, in order to further improve the power taking efficiency of the local end or the opposite end, the first waveform sequence may further have the following feature: a low level occurring in the first waveform sequence is in the duration Total time The length is less than one-half of the duration; and/or the third waveform sequence may also have the feature that the total duration of the low level occurring in the third waveform sequence is less than the total duration of the duration One-half of the duration. That is, in this alternative embodiment, the total duration occupied by the low level in the first waveform sequence and/or the third waveform sequence does not exceed one-half of a duration for a duration, thereby ensuring During the data transmission process, the high-level time between the local end and the opposite end enables the local end or the opposite end to obtain power from the other end for a long time, thereby improving the power supply efficiency.

In this embodiment, a falling edge level transition (or a rising edge level transition) or a plurality of falling edge level transitions (or a rising edge level jump) may occur in the first waveform sequence and the third waveform sequence. In the present embodiment, since the level of a port between the master and slave devices in the silent state continues to be a high level, the high level of the port is changed to a low level by a hardware switch or software, etc. A falling edge transition, and then controlling the port to return to a high level forms a rising edge transition. As an alternative embodiment, the third waveform sequence appears only once during the transmission duration by the low level. A level transition that goes high. The first waveform sequence starts at a high level and only occurs once from a high level to a low level during the transmission duration, and ends with a low level; or, the first waveform sequence is at a high level Starts and only one level transition from high to low occurs during the transmission duration and ends with a high level. Compared to a waveform sequence that includes multiple falling edge transitions or multiple rising edge transitions, there is only one falling edge level transition (or rising edge level transition) in one waveform sequence to reduce the control terminal. Operational complexity, no need to control the level of the transmission port to perform multiple hops to transmit a bit, improve the efficiency of data transmission.

An exemplary description will be given below for the three waveform sequences in this embodiment. Figure 3 shows a schematic diagram of three first waveform sequences, Figure 4 shows a schematic diagram of a second waveform sequence, and Figure 5 shows a schematic diagram of several third waveform sequences. Wherein, as shown in FIG. 3, the first waveform sequence starts at a high level and then transitions to a low level after a period of time, and the low level appearing in the first waveform sequence occupies the duration of the transmission. The total duration does not vary with the baud rate of the waveform sequence. For example, as shown in FIG. 3(a), the first waveform sequence has a transmission duration of 40 ns and a high level duration of 10 ns, which is 1/4 of the duration of the first waveform sequence. In practical applications, the master and slave devices are always in the connected state. The master device outputs a high level in the default state and continues to supply power to the slave device. When the master device needs to send data, it will generate a low level through its own on/off switch. The high and low levels form different waveform sequences to transmit the corresponding bit data. When the master device outputs a low level, the master device cannot supply power to the slave device. Therefore, in order to power the slave device as efficiently as possible, preferably, the total time that the low level occurring in the first waveform sequence occupies during the transmission duration may be less than one-half of the transmission duration; thus, The longer the high level of the transmitted data, the higher the power supply efficiency. As shown in FIG. 3(b), the duration of the first waveform sequence is 40 ns, the high level duration is 30 ns, and the transmission duration of the first waveform sequence is 3/4, and the data is transmitted in the first waveform sequence. The power supply efficiency is relatively high. Therefore, the first waveform sequence transmission data supply efficiency in FIG. 3(b) is higher than that in FIG. 3(a). In addition, the waveform of the first waveform sequence can also be as shown in FIG. 3(c). End with a high level. The second waveform sequence shown in FIG. 4 is always at a high level for the duration of time, thereby further improving the power supply efficiency. The third waveform sequence begins with a low level and ends with a high level, and the total duration of the low level occurring in the third waveform sequence for the duration of the transmission does not vary with the baud rate of the waveform sequence. And change. For example, as shown in FIG. 5(a), the baud rate is 50 Mbps, and the transmission duration of the third waveform sequence is 20 ns. Assuming that the duration of the low level is fixed to 10 ns, then the duration of the low level is occupied. The transmission duration of the three waveform sequences is 1/2, and the power take-off efficiency of the slave device is 50%. For another example, as shown in FIG. 5(b), the baud rate is 25 Mbps, and the transmission duration of the third waveform sequence is 40 ns. Assuming that the duration of the low level is still fixed at 10 ns, then the duration of the low level is It takes 1/4 of the transmission duration of the third waveform sequence. At this time, the power take-off efficiency of the slave device is 75%. When the low level is fixed, the transmission duration becomes longer as the baud rate decreases. The efficiency is improved, and thus it can be seen that the total duration of the low level during the duration of the transmission does not change with the change of the baud rate of the waveform sequence, which can improve the power taking efficiency. Therefore, the power transmission efficiency of the third waveform sequence transmission data in FIG. 5(b) is higher than that in FIG. 5(a). In addition, the total time that the low level appearing in the third waveform sequence in FIG. 5(b) can be less than one-half of the transmission duration can further improve the power supply efficiency.

In this embodiment, the durations of the first waveform sequence, the second waveform sequence, and the third waveform sequence are determined by the baud rate currently used by the local end. Therefore, in this embodiment, the baud rate parameter supported locally can be determined. The duration of the waveform sequence that can be resolved by the local end and the duration that the waveform sequence sent by the local end can be used.

In an optional implementation of the embodiment of the present invention, the locally supported baud rate parameter includes at least: a baud rate of receiving data and/or a baud rate of transmitting data; wherein the baud receiving data is The rate includes one or more; the baud rate of the transmitted data includes one or more. The baud rate of the received data is used to indicate the baud rate of the waveform sequence of the received data that can be parsed by the local end, and the baud rate of the transmitted data is used to indicate the baud rate that can be used by the waveform sequence sent by the local end, According to the baud rate of the transmitted data of the local end, the terminal can parse the waveform sequence sent by the local end. In this embodiment, the baud rate of the received data and the baud rate of the transmitted data may both be multiple, and after receiving the peer, the peer may select the same baud rate parameter according to the local end. The baud rate of the end and the opposite end realizes the baud rate adaptation.

In this embodiment, the local end may actively send the locally supported baud rate parameter to the opposite end, or may send the locally supported baud rate parameter to the opposite end after receiving the request from the opposite end. Therefore, in an optional implementation manner of this embodiment, before step S101, the method may further include: detecting a level change of the receiving port; determining continuous transmission according to the level change and the characteristic of the waveform sequence N waveform sequences corresponding to the first received data, wherein N is a positive integer, and each of the N waveform sequences corresponding to the first received data is one of: the first waveform sequence, the first a second waveform sequence and the third waveform sequence; determining a bit sequence of the first received data according to the N waveform sequences corresponding to the continuously transmitted first received data, the bit sequence of the first received data to The method includes: first transmission data, where the first transmission data includes at least: indication information for indicating that a baud rate parameter is acquired. With the optional implementation, the local end may acquire the first to-be-sent data after receiving the indication information that is sent by the peer to indicate that the baud rate parameter is obtained.

In the foregoing optional implementation manner, the local end may be aware of a baud rate adopted by a waveform sequence corresponding to a bit sequence in which the peer end transmits the first received data, for example, the peer end transmits using a pre-determined baud rate, in which case The local end can determine the N waveform sequences corresponding to the first received data that are continuously transmitted according to the baud rate used by the opposite end and the detected level change.

In the foregoing optional implementation, optionally, the local end may not know the baud rate adopted by the waveform sequence corresponding to the bit sequence of the first receiving data of the peer end, in this case, the local end may be pre- Setting a waveform sequence included in the data frame header and the detected level change, and parsing the duration of the waveform sequence corresponding to the bit sequence of the first received data from the data frame header of the bit sequence of the first received data, and further Obtaining a baud rate adopted by the waveform sequence corresponding to the bit sequence of the first receiving data, and then parsing the transmitted data portion of the data frame according to the obtained baud rate, thereby obtaining the first transmission data.

In an optional implementation of the embodiment of the present invention, the data frame header of the data frame transmitted between the local end and the opposite end includes at least one bit, and the waveform sequence corresponding to the first bit of the data frame header is the The third waveform sequence or the first waveform sequence, the local end negotiates with the opposite end to use the first waveform sequence or the third waveform sequence as the data frame header, and the detected level change of the receiving port forms the corresponding data frame header. In the waveform sequence, it can be determined that the currently received waveform sequence is a data frame header, and the waveform sequence immediately after the data frame header is the starting position of the waveform sequence of the transmission data. In this embodiment, in the case where the communication parties perform data transmission at a pre-negotiated baud rate, the data frame header can be identified by the above-described waveform sequence.

In another optional implementation of the embodiment of the present invention, the data frame header of the data frame transmitted between the local end and the opposite end may include at least M bits, and the waveform order corresponding to the first M bits of the data frame header is determined by M. The first waveform sequence is composed of; or the waveform sequence corresponding to the first M bits of the data frame header is composed of M third waveform sequences, M is a positive integer and M≥2; or, the first M bits of the data frame header correspond to The waveform sequence consists of at least one first waveform sequence and at least one third waveform sequence. Compared with the foregoing optional implementation manner, the optional implementation manner may further determine a preset duration of a waveform sequence by using a waveform sequence corresponding to the first M bits of the data frame header, that is, determine a wave that the sender sends data. The rate is high, and the baud rate can be used for data reception and transmission to achieve baud rate adaptation.

Further, when the waveform sequence corresponding to the first few bits of the data frame header of the data frame transmitted between the local end and the opposite end is a continuous same waveform sequence, in order to avoid single-frequency interference, the same waveform sequence may be continuously The latter (as long as it can be followed, for example, immediately after the same sequence of waveforms, or after several waveform sequences), at least one waveform sequence different from the same waveform sequence, ie corresponding to the anti-jamming bits, is agreed upon. Waveform sequence, for example, data frame When the waveform sequence corresponding to the first M bits of the header is composed of M first waveform sequences, the data frame header further includes: at least one anti-interference bit after the first M bits of the data frame header, wherein the at least one The anti-interference bit is a second waveform sequence or a third waveform sequence. For example, the waveform sequence corresponding to the data frame header may be XXXXYZYZ, where X is the first waveform sequence, Y is the second waveform sequence, and Z is the third waveform. Or; when the waveform sequence corresponding to the first M bits of the data frame header is composed of M of the third waveform sequences, the data frame header further includes: at least one anti-interference after the first M bits of the data frame header And a bit sequence, wherein the waveform sequence corresponding to at least one of the at least one anti-interference bit is a first waveform sequence or a second waveform sequence. For example, the waveform sequence corresponding to the data frame header may be ZZZZXYZZ. With this data frame header structure, single-frequency interference can be prevented, and single-frequency interference can be understood as a pulse sequence generated in the same cycle. Therefore, if the data frame header is composed of consecutive identical waveform sequences, for example, four consecutive Zs. The frequency of the single-frequency interference is exactly the same as the baud rate, that is, the local end recognizes the same waveform sequence as the data frame header by the level change. At this time, the local end recognizes the single-frequency interference as the data frame header. In the case of error recognition, the data frame headers in the third embodiment have different time intervals after successive consecutive identical waveform sequences, so that the data frame headers have different time intervals, that is, no The single frequency interferes with the same sequence of waveforms, whereby single-frequency interference can be prevented by the data frame header in this embodiment.

In this embodiment, the preset duration of a waveform sequence may be obtained by parsing the data frame header mentioned in the foregoing embodiments, and the preset duration is used as the transmission duration of each waveform sequence, according to The level change and waveform sequence characteristics determine the transmitted data in the received data and the data frame as a corresponding waveform sequence.

The following describes how to detect the level change of the receiving port and determine the specific implementation of the N waveform sequences according to the level change. This embodiment includes but is not limited to the following cases:

In an optional implementation manner, detecting a level change of the receiving port includes: continuously detecting S level transitions of the receiving port; and detecting the receiving port after detecting the S level transitions of the receiving port The Q level jumps, in which S level jumps and Q level jumps all jump from high level to low level, S and Q are positive integers, and S>1, Q> 1. Determining the continuously transmitted N waveform sequences according to the level change and the characteristics of the waveform sequence, comprising: acquiring L waveform sequences formed by the preset S level jumps of the data frame header, wherein L is a positive integer and 1<L <N; calculating the duration of a waveform sequence based on the characteristics of the L waveform sequences and the time interval between any two of the detected S level transitions; using the calculated duration as The duration of each waveform sequence determines the transmission data and the sequence of waveforms corresponding to the end of the data frame based on the Q level transitions and the characteristics of the waveform sequence. In this embodiment, the data sender and the data receiver pre-arrange the data frame header as a waveform sequence of L bits, the waveform sequence of the L bits corresponds to S level transitions, and the data receiver continuously detects the receiving port. During the level change, the detected S level transitions may be defaulted to S hops corresponding to the data frame header, and level changes (ie, detected Q hops) are detected after S hops. The variable is used to determine the transmission data in the data frame and the waveform sequence corresponding to the end of the data frame. Of course, in If necessary, it may also be determined whether the L waveform sequences formed according to the detected S level transitions correspond to the L bit waveform sequences of the preset data frame header, thereby determining the S level transitions. Whether it is a data frame header. After receiving the data frame header according to the foregoing method, the data receiver determines the duration T of a waveform according to the data frame header, and determines whether a level jump occurs in each T duration and a characteristic of each level jump. The Q levels jump to the corresponding waveform sequence to determine the entire N waveform sequence.

Specifically, according to the foregoing description of the format of the data to be sent, it may be determined that, when the first received data sent by the local end is received by the local end, the data frame header of several bits is received first, and then the subsequent transmission data and data are received. The end of the frame, and the data frame header carries some parameter information. For example, the local end and the opposite end pre-arrange L waveform sequences as data frame headers. Therefore, the local end can obtain from the opposite end or obtain L from its own memory. The characteristics of the waveform sequence, that is, the characteristics of the waveform sequence in the data frame header are known at the local end. According to the characteristics of the waveform sequence of the foregoing, it can be known that the first waveform sequence X starts with a high level, and it undergoes a level jump for the duration of the waveform and the time of the transition is T1 (T1 is from each waveform). The time from the start to the time when the transition occurs, T1>0); the second waveform sequence is a continuous high level, which does not undergo a level jump for the duration of the waveform; the third waveform sequence starts with a low level Since the default state of the local and the opposite ends is high, the third waveform sequence can be considered to undergo a level jump at the beginning of the waveform (which can be considered as time 0). For example, as shown in (a) of FIG. 6, when the pre-agreed L-waveform sequence of the data frame header is a 4-bit sequence "XZZZ", it can be considered that the data frame header needs to undergo a level jump of 4 falling edges. Change (X and Z both have a falling edge transition). When 4 falling edge transitions are detected in (a) of Fig. 6, the data frame header is considered to be received. That is, the four hops correspond to the data frame header.

Next, it is necessary to calculate information such as the duration carried in the data frame header based on the detected characteristics of the S hops and the L waveform sequences. Still detailed in the previous example, as shown in (b) of Figure 6, the two parties have agreed that the L-bit data frame header format is a 4-bit sequence "XZZZ". If no error occurs during data transmission, the local end receives The S transitions should be 4 falling edge transitions. The first waveform sequence in the data frame header data is known as the first waveform sequence X, and the transition time of the first waveform sequence X is T1=a*T, where a is a preset high level. The ratio of the second ratio is the third waveform sequence Z, and the third waveform sequence Z starts at a low level and continues to a high level after a fixed period of time (T2). The local end can detect the time interval τ between the first and second level jumps (level jump only refers to the level transition from high level to low level) at the receiving port, and the local end detects The time interval τ and the duration T to be satisfied should satisfy τ = (T - T1), that is, τ = (Ta * T). Therefore, the local end can calculate the duration T of a waveform sequence according to the waveform characteristics of the data frame header sequence and the time interval (ie, τ) between any two of the L level jumps, thereby The data frame header data can be used to determine the baud rate (ie, 1/T) used by the peer to transmit data. The first waveform sequence X in (a) of FIG. 6 and (b) of FIG. 6 ends with a high level, and the third waveform sequence Z ends with a high level. It is also available if the first waveform sequence ends with a low level and will not be described here.

Since the end position of the data frame header is the start position of the transmission data, after the duration T of each waveform is determined, the transmission data can be parsed from the end position of the data frame header. When the local end determines the waveform type according to the level transition of the detection level from the high level to the low level, according to the previously known waveform characteristics, in each period of duration T, when a falling edge is detected, When the time of the flat jump and the transition is T1, it can be determined as a first waveform sequence X; when it is detected that a certain waveform sequence has a falling edge level transition at the beginning of the duration, it can be determined It is a third waveform sequence Z; when it is detected that a certain model sequence does not have a falling edge level transition for the duration of the waveform, it can be determined as a second waveform sequence Y. It can be seen in (b) of FIG. 6 that the data after the data frame header "XZZZ" is the determined transmission data and the data frame tail. As can be seen from the analysis result, the data frame header "XZZZ" The subsequent waveform sequence is “XYXXYZZXYY” in sequence, as shown in (c) of Figure 6, and once “YY” appears, it can be considered as the end of the data frame. The actual transmission data is “XYXXYZZX”. If it is X In the case where 1, when Y or Z represents 0, the transmission data is finally parsed as "10110001", as shown in (d) of FIG.

Therefore, after determining the duration of each waveform sequence, the transmission data represented by the Q level transitions and the waveform sequence corresponding to the data frame tail can be determined by using the above method, and the data frame header has been determined in the foregoing. The L waveform sequences, by which a continuous sequence of N waveforms of varying levels can be determined, thereby finally parsing the transmitted data.

When determining the level change of the embodiment, the law of obtaining a complete level change may be sampled to obtain S level jumps, or only a circuit for monitoring the level change may be set to monitor the level jump, that is, The present invention is not limited to any one as long as it is possible to obtain S hops corresponding to the data frame header. If S level jumps are obtained by sampling, not only the characteristics of the level jump can be obtained, but also the waveform corresponding to the complete level change can be obtained, so that the characteristics of various waveform sequences need not be considered, and the method can be applied to The waveform sequence can be successfully resolved in any type of waveform sequence. If the monitoring level jump mode is used, it is not necessary to sample the level, and long-time sampling is avoided to restore the overall waveform. Only the characteristics of the level jump can be determined to determine N waveform sequences, which reduces the parsing. Complexity.

In the present embodiment, the sampling can use the sampling circuit to realize the level detection of the receiving port, and the matching sampling frequency can be adopted according to the different target to be sampled.

In the present embodiment, the level jump monitoring can be implemented by using a comparator, a differential amplifier, etc., of course, any hardware and software implementation that can achieve a monitoring level jump should be within the scope of the present invention.

As an optional implementation manner, in this embodiment, the local end and the opposite end may pre-arrange a waveform sequence corresponding to the data frame tail of the data frame of the transmission data. Optionally, the data frame tail may include 2 bits, and the corresponding waveform sequence includes one of the following three modes: the waveform sequence corresponding to the first bit of the data frame tail is the second waveform sequence, and the second of the data frame tail The waveform sequence corresponding to the bit is the second waveform sequence; or the waveform sequence corresponding to the first bit of the data frame tail is the third waveform sequence, and the waveform sequence corresponding to the second bit of the data frame tail is the second waveform sequence; or The waveform sequence corresponding to the first bit of the data frame tail is the first waveform sequence, and the waveform sequence corresponding to the second bit of the data frame tail is the third waveform. sequence. In this embodiment, when the waveform sequence determined according to the level change and the characteristics of the waveform sequence is the waveform sequence corresponding to the preset data frame end, the data reception ends. In this embodiment, the waveform sequence corresponding to the data frame header and the data frame tail is pre-agreed by the communication protocol. Generally speaking, the same waveform sequence does not appear in the data frame header and the data frame tail, so that the data frame header is easier to be used. Identifying and distinguishing from the end of the data frame. If the waveform sequence in the agreed data frame header contains two waveform sequences in the end of the data frame, the data frame header and the data frame can be distinguished by some strategies, for example, the data frame header. It can be agreed to be 8 bits, that is, composed of 8 waveform sequences, and the data frame tail is composed of 2 waveform sequences, so as the difference between the two, since the level of the silent state receiving port is always high, at the receiving port. When the first falling edge transition is detected, the data frame header is started to be received, and the waveform sequence corresponding to the 8 preset data frame headers is continuously detected, and the data frame header is received. In short, the data frame header and the data frame can be distinguished. That is, the present embodiment does not specifically limit the waveform sequence corresponding to the data frame header and the data frame tail.

Step S102: Acquire a waveform sequence corresponding to a bit in the bit sequence according to a bit sequence of the first data to be transmitted.

In this embodiment, the local end and the opposite end of the data transmission may negotiate in advance to indicate the waveform sequence type of bit 1 and bit 0, or the local end and the opposite end are pre-set and stored for indicating bit 1 and before being shipped from the factory. The waveform sequence type of bit 0, for example, the first waveform sequence represents bit 1, and the second waveform sequence and the third waveform sequence are both capable of representing bit 0. At this time, for the data origin, when the outgoing data bit 1 is required, The local end generates a first waveform sequence. When an outgoing data bit 0 is required, the local end generates a second waveform sequence or a third waveform sequence as needed. Similarly, when the first waveform sequence represents bit 0, the second waveform sequence and The third waveform sequence can represent bit 1 at this time. For the local end, when the outgoing data bit 1 is needed, the local end generates the second waveform sequence or the third waveform sequence as needed, when the outgoing data bit 0 is needed. The local end generates a first waveform sequence; by using different waveform sequences to represent bit 0 and bit 1, the normal data transmission and reception of both communication parties can be realized, and the correctness of data interaction is ensured;

In this embodiment, the first waveform sequence, the second waveform sequence, and the third waveform sequence are respectively three kinds of pulse waves having different waveforms, and the first waveform sequence, the second waveform sequence, and the third waveform sequence are single waveforms. The pulse duration is the same, that is, the single pulse of the three waveform sequences lasts for the same time from the start of the pulse to the end of the pulse; the duration of a single pulse of the three waveform sequences from the start of the pulse to the end of the pulse is T.

In step S102, the local end acquires and analyzes the first to-be-sent data, and acquires according to the correspondence between the bit 1, the bit 0, the first waveform sequence, the second waveform sequence, and the third waveform sequence in the first to-be-sent data. A sequence of waveforms corresponding to the bit sequence of the first data to be transmitted. Wherein, when at least two consecutive bits in the bit sequence are the second data bit, a waveform sequence corresponding to a first bit of the at least two consecutive bits is the second waveform sequence, and a second The waveform sequence corresponding to the bit and the subsequent bit is the third waveform sequence; that is, when there are A (A ≥ 2) consecutive second data bits in the bit sequence of the first data to be transmitted, only the first a second data bit with a second waveform sequence The column indicates that the following A-1 second data bits are represented by the third waveform sequence, so that when the second data bit needs to be continuously transmitted, the local end continuously outputs the second waveform sequence, that is, the local end continuously outputs high power. The flat signal causes the peer to distinguish between the received second data bit and the continuous high level when there is no data transmission.

Step S103, continuously transmitting a waveform sequence corresponding to the bit in the bit sequence according to the currently used baud rate, wherein the duration of the waveform sequence is inversely proportional to the currently used baud rate.

In this embodiment, the baud rate currently used by the local end may be the default baud rate of the local end, or in the case that the local end receives the indication information for sending the baud rate parameter sent by the opposite end. The baud rate currently used by the local end may be the baud rate of the indication information sent by the peer end to indicate the baud rate parameter, so as to ensure that the baud rate currently used by the local end is the baud rate supported by the peer end. It is convenient for the peer to parse the data sent by the local end.

In an optional implementation manner of this embodiment, when performing the step S103, the waveform sequence corresponding to the bit in the bit sequence of the first data to be transmitted is sent, the local end controls according to the currently used baud rate. The level of the transmitting port is changed according to the waveform sequence corresponding to the bit in the bit sequence of the first data to be transmitted and the characteristics of the waveform sequence to transmit the first data to be transmitted. For example, the communication protocol stipulates that the bit "1" is represented by the first waveform sequence, and the bit "0" is represented by the second waveform sequence and the third waveform sequence. In this embodiment, each of the bit sequences of the first data to be transmitted The waveform sequence corresponding to the bits is determined. For example, the local end generates a high and low level by controlling the transmitting port, that is, the high level of the port is changed to a low level by a hardware switch or software, etc., as a transition of a falling edge. Then, controlling the port to return to a high level forms a jump on the rising edge. The waveform sequence is obtained by the change of the high and low levels generated by the transmission port, whereby the waveform sequence corresponding to each bit can be generated, thereby forming a waveform sequence corresponding to the data frame. For example, if the bit sequence of the first data to be transmitted is 11001000, then according to the communication protocol, the eight waveform sequences corresponding to the bit sequence of the first data to be transmitted are XXYZXYZZ, wherein X is the first waveform sequence, and Y is the second. a waveform sequence, Z is a third waveform sequence, and the transmission durations of the first waveform sequence, the second waveform sequence, and the third waveform sequence are the same according to the characteristics of the waveform sequence of each waveform sequence, and the current used porter The ratio is inversely proportional. If both are T, the duration of the high level of the first waveform sequence is T1, and the fixed duration of the low level in the first waveform sequence and the third waveform sequence is both T2, then the first to be sent The eight waveform sequences corresponding to the bit sequence 11001000 of the data can be as shown in FIG. When each bit of the bit sequence of the first data to be transmitted is sent, the level of the transmission port is controlled to be hopped at a corresponding time to form a waveform sequence corresponding to the bit, thereby forming a waveform sequence corresponding to the bit sequence of the data frame. And transmitting a bit sequence of the first data to be transmitted.

In an optional implementation of the embodiment of the present invention, after the step S103 is performed, the peer end receives the locally supported baud rate parameter sent by the local end, and the peer end may according to the locally supported wave of the local end. The rate parameter selects the baud rate for subsequent communication with the local end. Optionally, the peer end may select the according to the locally supported baud rate parameter. The maximum baud rate supported by the local end, and the selected baud rate is returned to the local end, thereby increasing the transmission rate. In a specific application, when the peer sends the selected baud rate, the selected baud rate may be used for transmission, or may be used when the local end sends the locally supported baud rate parameter to the opposite end. The baud rate parameter, or, can also be transmitted using the baud rate currently used by the peer. Therefore, in an optional implementation of the embodiment of the present invention, after step S103, the method may further include: detecting a level change of the receiving port; determining the opposite end according to the level change and the characteristic of the waveform sequence The M waveform sequences corresponding to the second received data that are continuously transmitted, wherein M is a positive integer and M≥2, and each of the M waveform sequences corresponding to the second received data is one of the following: a first waveform sequence, the second waveform sequence, and the third waveform sequence; determining a bit sequence of the second received data according to the M waveform sequences corresponding to the continuously transmitted second received data; Receiving data, obtaining a baud rate selected by the peer end from the locally supported baud rate parameter; acquiring a bit sequence of the second to-be-sent data; and transmitting the second according to the selected baud rate A sequence of waveforms corresponding to a sequence of bits of data to be transmitted, wherein the duration of the sequence of waveforms is inversely proportional to the selected baud rate.

In the above embodiment, the local end determines the M waveform sequences corresponding to the second received data continuously transmitted by the opposite end according to the level change of the receiving port and the characteristics of the waveform sequence, and parses the second received data in the manner described above. The manner of determining the N waveform sequences corresponding to the first received data and parsing the first received data is similar, and details are not described herein again.

In the above embodiment, after receiving the second received data, the local end obtains the baud rate selected by the opposite end, and when transmitting the second to-be-sent data, the local end sends the second according to the selected baud rate. The data to be sent is implemented, thereby realizing the baud rate adaptation between the local end and the opposite end.

In the above embodiment, the second to-be-sent data needs to be transmitted to the peer end, and in the specific transmission process, the local end may send the second to-be-sent data in the structure of the data frame, and the second to-be-sent data The specific content of this embodiment is not limited.

In the solution provided by the embodiment, in order to ensure that the peer end uses the baud rate supported by the local end to perform data interaction in the subsequent data transmission process, the local end sends the local support to the peer end in the bit sequence of the first data to be sent. The baud rate parameter, so that the local end and the peer end can use a variety of baud rates for data interaction, and only need to include the locally supported baud rate parameter in the data to be sent at the local end, thereby realizing the wave during data transmission. The hopping of the special rate enables the communication parties to adjust the baud rate according to different data transmission scenarios to meet the data transmission needs in different communication scenarios.

Example 2

The present embodiment provides a data transmission apparatus, which may be disposed in the local end described in Embodiment 1 for performing the data transmission method described in Embodiment 1.

FIG. 8 is a schematic structural diagram of a data transmission apparatus according to the embodiment. As shown in FIG. 8, the data transmission apparatus mainly includes: a first acquisition module 800, a second acquisition module 802, and a first transmission module 804.

The functions of the various functional modules of the data transmission device provided by this embodiment are mainly described below. For other matters, reference may be made to the description of Embodiment 1.

The first obtaining module 800 is configured to obtain a bit sequence of the first data to be sent, where the bit sequence of the first data to be sent includes at least: data to be transmitted, where the data to be transmitted includes at least: a locally supported baud a second parameter obtaining module 802, configured to acquire a waveform sequence corresponding to a bit in the bit sequence according to a bit sequence of the first data to be transmitted, where the first data bit is represented by the first waveform sequence, and the second The waveform sequence or the third waveform sequence represents a second data bit, the first data bit being one of bit 1 and bit 0, the second data bit being the other of bit 1 and bit 0, When there are at least two consecutive bits in the bit sequence as the second data bit, a waveform sequence corresponding to the first bit of the at least two consecutive bits is the second waveform sequence, the second bit and subsequent The waveform sequence corresponding to the bit is the third waveform sequence; wherein the characteristics of the waveform sequence include: a duration of the first waveform sequence, the second waveform sequence The duration of the third waveform sequence is the same, the transmission duration is inversely proportional to the baud rate of the waveform sequence, and the first waveform sequence begins with a high level and is in the transmission A low level occurs for a duration, wherein a total duration of the low level occurring in the first waveform sequence during the transmission duration does not vary with a change in a baud rate of the waveform sequence, The second waveform sequence continues for a high level during the transmission duration, the third waveform sequence begins with a low level and ends with a high level, and a low level occurring in the third waveform sequence is The total duration of the transmission duration does not vary with the baud rate of the waveform sequence.

In this embodiment, the locally supported baud rate parameter is used to indicate the baud rate supported by the waveform sequence used by the local transmission data when transmitting data (including receiving and transmitting data). The waveform sequence in this embodiment will be described below.

In an optional implementation of the embodiment of the present invention, the first sending module 804 is configured to continuously send a waveform sequence corresponding to a bit in the bit sequence according to the following manner: according to the currently used baud rate, control The level of the transmitting port is changed according to the waveform of the waveform sequence corresponding to the bit in the bit sequence and the characteristics of the waveform sequence to transmit the first to-be-sent data. For example, the communication protocol stipulates that the bit "1" is represented by the first waveform sequence, and the bit "0" is represented by the second waveform sequence and the third waveform sequence. In this embodiment, each of the bit sequences of the first data to be transmitted The waveform sequence corresponding to the bits is determined. For example, the first transmitting module 804 generates a high level by controlling the transmitting port, that is, controlling the high level of the port to become a low level by a hardware switch or software, etc. as a falling edge. The transition, then controlling the port to return to a high level forms a rising edge transition. The waveform sequence is obtained by the change of the high and low levels generated by the transmission port, thereby generating a waveform sequence corresponding to each bit, thereby forming a waveform sequence corresponding to the data frame. Column. For example, if the bit sequence of the first data to be transmitted is 11001000, then according to the communication protocol, the eight waveform sequences corresponding to the bit sequence of the i-th data frame are XXYZXYZZ, wherein X is the first waveform sequence, and Y is the second. a waveform sequence, Z is a third waveform sequence, and the transmission durations of the first waveform sequence, the second waveform sequence, and the third waveform sequence are the same according to the characteristics of the waveform sequence of each waveform sequence, and the current used porter The rate is inversely proportional. If the first preset time is T1 and the second preset time is T2, then the eight waveform sequences corresponding to the bit sequence 11001000 of the first data to be transmitted may be as shown in FIG. 7. When each bit of the bit sequence of the first data to be transmitted is sent, the level of the transmission port is controlled to be hopped at a corresponding time to form a waveform sequence corresponding to the bit, thereby forming a waveform sequence corresponding to the bit sequence of the data frame. And transmitting a bit sequence of the first data to be transmitted.

In an optional implementation of the embodiment of the present invention, the data transmission apparatus may further include: a first detecting module, configured to detect the receiving port before the first obtaining module 800 acquires the bit sequence of the first data to be transmitted a first determining module, configured to determine, according to the level change and the feature of the waveform sequence, N waveform sequences corresponding to the first received data continuously transmitted, wherein N is a positive integer, Each of the N waveform sequences corresponding to the first received data is one of: the first waveform sequence, the second waveform sequence, and the third waveform sequence; and a second determining module, configured to: Determining, according to the N waveform sequences corresponding to the continuously transmitted first received data, a bit sequence of the first received data, where the bit sequence of the first received data includes at least: first transmission data, the first transmission data The method at least includes: indicating information for obtaining a baud rate parameter. With the optional implementation, the first obtaining module 800 may obtain the first to-be-sent data after receiving the indication information that is sent by the peer to indicate that the baud rate parameter is obtained, that is, according to the request of the peer end. The peer sends the locally supported baud rate parameter.

The first determining module determines, according to the detected level change and the feature of the waveform sequence, an optional implementation manner of the N waveform sequences corresponding to the first received data continuously transmitted and the second determining module according to the continuous transmission For an optional implementation of determining a bit sequence of the first received data, the N-wave sequence corresponding to the first received data may be used to determine the N waveform sequences corresponding to the first received data in the first embodiment and determine the first receiving. The description of the optional implementation of the bit sequence of the data is not described in detail in this embodiment.

In an optional implementation of the embodiment of the present invention, the data transmission apparatus may further include: a second detecting module, configured to continuously transmit the bit in the bit sequence according to the bit sequence according to the first data to be transmitted After the corresponding waveform sequence, detecting a level change of the receiving port; and a third determining module, configured to determine, according to the level change and the feature of the waveform sequence, the M waveform sequences corresponding to the second received data continuously transmitted by the opposite end Wherein, M is a positive integer and M≥2, and each of the M waveform sequences corresponding to the second received data is one of the following: the first waveform sequence, the second waveform sequence, and the a third determining module, configured to determine a bit sequence of the second received data according to the M waveform sequences corresponding to the continuously transmitted second received data; and a third obtaining module, configured to parse the Receiving data, acquiring a baud rate selected by the peer from the locally supported baud rate parameter; a fourth acquiring module, configured to acquire a bit sequence of the second data to be sent, and a second sending module, configured to send, according to the selected baud rate, a waveform sequence corresponding to the bit sequence of the second data to be sent, where The duration of the waveform sequence is inversely proportional to the selected baud rate. With the optional implementation, the local end can obtain the baud rate selected by the peer according to the locally supported baud rate parameter, and send the bit sequence of the second data to be sent by using the baud rate selected by the peer end. A bounce rate is achieved.

In the foregoing optional implementation manner, optionally, the baud rate selected by the peer end may be the maximum baud rate supported by the local end, so that the transmission rate may be increased.

In an optional implementation of the embodiment of the present invention, the second sending module sends a waveform sequence corresponding to the bit sequence of the second to-be-sent data according to the following manner: controlling the sending port according to the selected baud rate The level is changed according to the waveform of the waveform sequence corresponding to the bit in the bit sequence of the second data to be transmitted and the characteristics of the waveform sequence to transmit the second data to be transmitted.

The embodiment of the present invention further provides a computer readable storage medium having instructions stored therein, when the processor of the terminal executes the instruction, the terminal performs a data transmission method according to an embodiment of the present invention.

The logic and/or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable instructions for implementing logical functions, and may be embodied in any computer readable medium, Used in conjunction with, or in conjunction with, an instruction execution system, apparatus, or device (eg, a computer-based system, a system including a processor, or other system that can fetch instructions and execute instructions from an instruction execution system, apparatus, or device) Or use with equipment. For the purposes of this specification, a "computer-readable medium" can be any apparatus that can contain, store, communicate, propagate, or transport a program for use in an instruction execution system, apparatus, or device, or in conjunction with the instruction execution system, apparatus, or device.

It should be understood that portions of the invention may be implemented in hardware, software, firmware or a combination thereof. In the above-described embodiments, multiple steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one or combination of the following techniques well known in the art: having logic gates for implementing logic functions on data signals. Discrete logic circuits, application specific integrated circuits with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

Claims

A data transmission method, comprising:

Obtaining a bit sequence of the first to-be-sent data, where the bit sequence of the first to-be-sent data includes at least: data to be transmitted, where the data to be transmitted includes at least: a locally supported baud rate parameter;

Obtaining, according to a bit sequence of the first data to be transmitted, a waveform sequence corresponding to the bit in the bit sequence, wherein the first data bit is represented by the first waveform sequence, and the second data is represented by the second waveform sequence or the third waveform sequence a bit, the first data bit being one of bit 1 and bit 0, the second data bit being the other of the bit 1 and bit 0, wherein at least two consecutive bits in the bit sequence are The second data bit, the waveform sequence corresponding to the first bit of the at least two consecutive bits is the second waveform sequence, and the waveform sequence corresponding to the second bit and the subsequent bit is the third a waveform sequence; wherein the characteristics of the waveform sequence include: a duration of the first waveform sequence, a duration of the second waveform sequence, and a duration of the third waveform sequence being the same, the transmission duration and The baud rate of the waveform sequence is inversely proportional, and the first waveform sequence starts at a high level and exhibits a low level during the transmission duration, wherein the first The total duration of the low level occurring in a waveform sequence for the duration of the transmission does not vary with the change in the baud rate of the sequence of waveforms, the second sequence of waveforms continuing to be high for the duration of the transmission Level, the third waveform sequence starts with a low level and ends with a high level, and the total time that the low level occurring in the third waveform sequence occupies during the transmission duration does not follow the waveform The baud rate of the sequence changes;

A waveform sequence corresponding to a bit in the bit sequence is continuously transmitted according to a currently used baud rate, wherein a duration of the waveform sequence is inversely proportional to the currently used baud rate.
The method according to claim 1, wherein continuously transmitting the waveform sequence corresponding to the bit in the bit sequence according to the currently used baud rate comprises:

According to the currently used baud rate, the level of the control transmission port is changed according to the waveform of the waveform sequence corresponding to the bit in the bit sequence and the characteristics of the waveform sequence to transmit the first to-be-sent data.
The method according to claim 1 or 2, wherein before the acquiring the bit sequence of the first data to be transmitted, the method further comprises:

Detecting the level change of the receiving port;

Determining, according to the level change and the feature of the waveform sequence, N waveform sequences corresponding to the first received data that are continuously transmitted, wherein N is a positive integer, and the N waveform sequences corresponding to the first received data Each of the waveform sequences is one of: the first waveform sequence, the second waveform sequence, and the third waveform sequence;

Determining, according to the N waveform sequences corresponding to the continuously transmitted first received data, a bit sequence of the first received data, where the bit sequence of the first received data includes at least: first transmission data, the first transmission data The method at least includes: indicating information for obtaining a baud rate parameter.
The method according to any one of claims 1 to 3, wherein after the waveform sequence corresponding to the bit in the bit sequence is continuously transmitted according to the bit sequence of the first data to be transmitted, the method Also includes:

Detecting the level change of the receiving port;

Determining, according to the level change and the feature of the waveform sequence, M waveform sequences corresponding to the second received data continuously transmitted by the peer end, where M is a positive integer and M≥2, and the M corresponding to the second received data Each of the waveform sequences in the waveform sequence is one of: the first waveform sequence, the second waveform sequence, and the third waveform sequence;

Determining a bit sequence of the second received data according to the M waveform sequences corresponding to the continuously transmitted second received data;

Parsing the second received data, and acquiring a baud rate selected by the peer from the locally supported baud rate parameter;

Obtaining a bit sequence of the second data to be transmitted;

And transmitting, according to the selected baud rate, a waveform sequence corresponding to the bit sequence of the second data to be transmitted, wherein a duration of the waveform sequence is inversely proportional to the selected baud rate.
The method according to claim 4, wherein a waveform sequence corresponding to the bit sequence of the second data to be transmitted is transmitted according to the selected baud rate, wherein a duration of the waveform sequence is The selected baud rate is inversely proportional, including:

And controlling, according to the selected baud rate, a level of the transmission port according to a waveform of a waveform sequence corresponding to a bit in the bit sequence of the second data to be transmitted and a characteristic of the waveform sequence, to send the Two data to be sent.
The method according to any one of claims 1 to 5, characterized in that

The locally supported baud rate parameter includes at least: a baud rate of receiving data and/or a baud rate of transmitting data; wherein:

The baud rate of the received data includes one or more;

The baud rate of the transmitted data includes one or more.
The method according to any one of claims 1 to 6, wherein the characteristics of the waveform sequence further comprise:

The total time that the low level occurring in the first waveform sequence occupies for the duration is less than one-half of the duration; and/or

The total duration of the low level occurring in the third waveform sequence for the duration is less than the duration One-half.
A method according to any one of claims 1 to 7, wherein

The third waveform sequence only shows a level transition from a low level to a high level during the duration, and ends with a high level;

The first waveform sequence starts at a high level and only occurs once at a level transition from a high level to a low level during the duration, and ends with a low level; or, the first waveform The sequence begins with a high level and transitions from a high level to a low level only once during the duration and ends with a high level.
A method according to any one of claims 1 to 8, wherein

The bit sequence of the first data to be transmitted and the bit sequence of the second data to be transmitted each include a data frame, where the data frame includes: a data frame header, a transmission data, and a data frame tail; the data frame header is at least Including M bits, M is a positive integer and M ≥ 2;

Wherein the waveform sequence corresponding to the first M bits of the data frame header is composed of M first waveform sequences; or

a waveform sequence corresponding to the first M bits of the data frame header is composed of M of the third waveform sequences; or

A waveform sequence corresponding to the first M bits of the data frame header includes at least one of the first waveform sequence and at least one of the third waveform sequence.
The method of claim 9 wherein:

When the waveform sequence corresponding to the first M bits of the data frame header is composed of M first waveform sequences, the data frame header further includes: at least one after the first M bits of the data frame header An anti-interference bit, wherein the waveform sequence corresponding to the at least one anti-interference bit is the second waveform sequence or the third waveform sequence;

When the waveform sequence corresponding to the first M bits of the data frame header is composed of M third waveform sequences, the data frame header further includes: at least one after the first M bits of the data frame header The anti-interference bit, wherein the waveform sequence corresponding to the at least one anti-interference bit is the second waveform sequence or the first waveform sequence.
A data transmission device, comprising:

a first acquiring module, configured to acquire a bit sequence of the first data to be transmitted, where the bit sequence of the first data to be transmitted includes at least: data to be transmitted, where the data to be transmitted includes at least: a locally supported baud rate parameter;

a second acquiring module, configured to acquire a waveform sequence corresponding to a bit in the bit sequence according to a bit sequence of the first data to be transmitted, where the first data bit is represented by the first waveform sequence, and the second waveform sequence or the second The three waveform sequence represents a second data bit, the first data bit being one of bit 1 and bit 0, the second data bit being the other of bit 1 and bit 0, in the bit sequence When there are at least two consecutive bits as the second data bit, a waveform sequence corresponding to the first bit of the at least two consecutive bits is the second waveform sequence, and the second bit and subsequent bits correspond to The waveform sequence is the third waveform sequence; wherein the characteristics of the waveform sequence include: The duration of the first waveform sequence, the duration of the second waveform sequence, and the duration of the third waveform sequence are the same, the transmission duration is inversely proportional to the baud rate of the waveform sequence, and The first waveform sequence begins with a high level and exhibits a low level for the duration of the transmission, wherein the total time that the low level occurring in the first waveform sequence occupies during the transmission duration does not follow Varying a change in the baud rate of the sequence of waveforms, the second sequence of waveforms continuing for a high level during the duration of the transmission, the third sequence of waveforms beginning with a low level and ending with a high level, and The total duration of the low level occurring in the third waveform sequence for the duration of the transmission does not change with the change of the baud rate of the waveform sequence;

a first sending module, configured to continuously transmit a waveform sequence corresponding to a bit in the bit sequence according to a currently used baud rate, wherein a duration of the waveform sequence is inversely proportional to the currently used baud rate .
The apparatus according to claim 11, wherein the first transmitting module is configured to continuously transmit a waveform sequence corresponding to a bit in the bit sequence in the following manner:

According to the currently used baud rate, the level of the control transmission port is changed according to the waveform of the waveform sequence corresponding to the bit in the bit sequence and the characteristics of the waveform sequence to transmit the first to-be-sent data.
The device according to claim 11 or 12, further comprising:

a first detecting module, configured to detect a level change of the receiving port before the first acquiring module acquires a bit sequence of the first data to be sent;

a first determining module, configured to determine, according to the level change and the feature of the waveform sequence, N waveform sequences corresponding to the first received data that are continuously transmitted, wherein N is a positive integer, the first receiving Each of the N waveform sequences corresponding to the data is one of: the first waveform sequence, the second waveform sequence, and the third waveform sequence;

a second determining module, configured to determine a bit sequence of the first received data according to the N waveform sequences corresponding to the continuously transmitted first received data, where the bit sequence of the first received data includes at least: first transmission data The first transmission data includes at least: indication information for indicating that a baud rate parameter is acquired.
The apparatus according to any one of claims 11 to 13, further comprising:

a second detecting module, configured to detect a level change of the receiving port after continuously transmitting the waveform sequence corresponding to the bit in the bit sequence according to the bit sequence of the first data to be transmitted;

a third determining module, configured to determine, according to the level change and the feature of the waveform sequence, M waveform sequences corresponding to the second received data continuously transmitted by the peer end, where M is a positive integer and M≥2, Each of the M waveform sequences corresponding to the second received data is one of the following: the first waveform sequence, the second waveform sequence, and the third waveform sequence;

a fourth determining module, configured to determine, according to the M waveform sequences corresponding to the continuously transmitted second received data a bit sequence of the second received data;

a third acquiring module, configured to parse the second received data, and obtain a baud rate selected by the peer end from the locally supported baud rate parameter;

a fourth acquiring module, configured to acquire a bit sequence of the second data to be sent;

a second sending module, configured to send, according to the selected baud rate, a waveform sequence corresponding to a bit sequence of the second data to be transmitted, wherein a duration of the waveform sequence is equal to the selected baud rate Inverse ratio.
The apparatus according to claim 14, wherein the second sending module sends a waveform sequence corresponding to the bit sequence of the second data to be transmitted in the following manner:

And controlling, according to the selected baud rate, a level of the transmission port according to a waveform of a waveform sequence corresponding to a bit in the bit sequence of the second data to be transmitted and a characteristic of the waveform sequence, to send the Two data to be sent.
A computer readable storage medium having instructions stored therein, the terminal performing the data transmission method according to any one of claims 1 to 10 when a processor of the terminal executes the instruction.