WO2022155769A1 - Data transmission method, first chip, electronic device and storage medium - Google Patents

Abstract

Part of the embodiments of the present application provide a data transmission method, a first chip, an electronic device and a storage medium. Working modes supported during a data transmission process of a first chip and a second chip comprise a standard working mode and a non-standard working mode; the standard working mode is a working mode in which data is transmitted with the second chip between standard channels based on a standard Bluetooth protocol by means of frequency hopping; and the non-standard working mode comprises any one among the following or a combination thereof: a first working mode in which data is transmitted in a specified first fixed channel; a second working mode in which data is transmitted by means of frequency hopping between expanded expansion channels; a third working mode in which data is transmitted in a specified second fixed channel; and a fourth working mode in which data is transmitted by means of frequency hopping between a standard channel based on the standard Bluetooth protocol and the expanded expansion channel. By employing the embodiments of the present application, transmission requirements in different scenarios may be met while being compatible with existing standard Bluetooth protocol.

Description

Data transmission method, first chip, electronic device and storage medium technical field

The present application relates to the field of communication technologies, and in particular, to a data transmission method, a first chip, an electronic device and a storage medium.

Background technique

The current low-power Bluetooth (Bluetooth Low Energy, BLE) works in the 2400Mhz-2480Mhz frequency band range specified by the standard Bluetooth protocol, with 2Mhz as a step, the entire working frequency band is divided into 40 channels, between 40 channels It is difficult to transmit data in a frequency hopping manner, which is difficult to meet the data transmission requirements in different scenarios.

SUMMARY OF THE INVENTION

The purpose of some embodiments of this application is to provide a data transmission method, a first chip, an electronic device and a storage medium, so that the transmission requirements in different scenarios can be met while being compatible with the existing standard Bluetooth protocol.

An embodiment of the present application provides a data transmission method, which is applied to a first chip. The working modes supported by the first chip and the second chip during data transmission include a standard working mode and a non-standard working mode; the standard working mode The working mode is a working mode in which data is transmitted with the second chip in a frequency hopping manner between standard channels based on the standard Bluetooth protocol; the non-standard working mode includes any one or a combination of the following: A first working mode in which the second chip transmits data; wherein, the first fixed channel is one of the standard channels; data is transmitted with the second chip in a frequency hopping manner between the extended extended channels The second working mode of the device; the third working mode of transmitting data with the second chip in the designated second fixed channel; wherein, the second fixed channel is one of the extended extended channels; A fourth working mode in which data is transmitted with the second chip in a frequency hopping manner between the standard channel of the protocol and the extended extension channel.

Embodiments of the present application further provide a first chip, where the first chip is located in an electronic device and is connected to a memory in the electronic device, and the memory stores instructions that can be executed by the first chip, so The instruction is executed by the first chip, so that the first chip can execute the data transmission method applied to the first chip as described above.

Embodiments of the present application further provide an electronic device, including: the above-mentioned first chip, and a memory connected to the first chip.

Embodiments of the present application further provide a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the above-mentioned data transmission method is implemented.

In this embodiment of the present application, the working modes supported by the first chip and the second chip during data transmission include standard working modes and non-standard working modes, that is, the first chip and the second chip can support different working modes, which is conducive to satisfying Data transmission requirements in different scenarios. Since the standard working mode is a working mode in which data is transmitted between the standard channels based on the standard Bluetooth protocol and the second chip in a frequency hopping manner, that is, the first chip and the second chip can be compatible with the existing standard Bluetooth protocol while supporting other The non-standard working mode is beneficial to expand the scope of application of the first chip and the second chip while meeting the data transmission requirements in different scenarios, so that the audience of the first chip and the second chip is wider. The first working mode of transmitting data with the second chip in the designated first fixed channel is conducive to meeting the data transmission requirements in the scenario where a certain channel needs to be customized in the standard channel for data transmission, and is also conducive to improving the efficiency of data transmission. efficiency. The second working mode of transmitting data with the second chip in a frequency hopping manner between the extended extended channels is beneficial to meet the data transmission requirements in the scenario where frequency hopping in the extended channel is required, and is also beneficial to avoid the ITU radio Interference in the unlicensed ISM band used by the three major institutions of Industry, Science, and Medicine (ISM) by the Communications Bureau to improve the stability of data transmission. The third working mode of transmitting data with the second chip in the designated second fixed channel is conducive to meeting the data transmission requirements in the scenario where a certain channel needs to be customized in the extended channel for data transmission, and is also conducive to improving data transmission. While avoiding the interference of the ISM frequency band to improve the stability of data transmission. The fourth working mode of transmitting data with the second chip in a frequency hopping manner between the standard channel based on the standard Bluetooth protocol and the extended extension channel, that is, supporting more channels (more than 40) to transmit data in a frequency hopping manner, The frequency hopping range is expanded, and the data transmission pressure of the standard channel can be averaged between the standard channel and the extended channel, thereby reducing the pressure of data transmission and improving the efficiency of data transmission. Accommodating more devices for data transmission is conducive to meeting the transmission requirements in scenarios with high Bluetooth low energy network density.

In addition, if the first chip is a chip that sends a switching instruction, the method includes: if a preset trigger condition is satisfied, sending a switching instruction to the second chip; wherein the switching instruction carries a switching time point and a target working mode, the switching instruction is used to instruct the second chip to switch the current working mode of the second chip to the target working mode at the switching time point; The current working mode of the chip is switched to the target working mode; wherein, the current working mode and the target working mode are two different working modes among the standard working mode and the non-standard working mode. By sending the switching command, the first chip and the second chip are switched to the same working mode at the same time point, which is beneficial to meet the data transmission requirements of different scenarios and ensure that the switching between the first chip and the second chip after the working mode is switched. Ability to transmit data accurately.

For example, the non-standard working mode includes the second working mode and/or the third working mode, and the triggering condition includes: determining that the first chip is in a state where a Bluetooth connection has been established with the second chip and has not been The state of Bluetooth pairing; the target working mode is the second working mode or the third working mode. Considering that in the process of Bluetooth pairing, the pairing parties need to exchange secret keys. In related technologies, since most of the third-party monitoring devices support the standard Bluetooth protocol, it is easy to monitor the working frequency band of the standard Bluetooth protocol, so it is easy to steal the process of Bluetooth pairing. 's secret key. Therefore, in the embodiment of the present application, before the Bluetooth pairing, the pairing parties switch the working mode, so that when the Bluetooth pairing is performed, the frequency point of the communication between the pairing parties can jump out of the standard frequency band of the standard Bluetooth protocol. The second working mode or the third working mode will not use the standard frequency band of the standard Bluetooth protocol, which can avoid being monitored by a third-party monitoring device, thereby avoiding the theft of the secret key in the process of Bluetooth pairing, which is conducive to improving the Security during pairing.

For example, the working mode before the handover is the standard working mode. Considering that the extended frequency band is not an unlicensed ISM frequency band open to the three major institutions of industry, science and medicine for use by the International Communications Union Radiocommunication Bureau, it may be occupied for a long time. This results in a waste of resources. Therefore, after the pairing is completed, the standard working mode or the first working mode is restored, that is, the working mode that does not occupy the extended frequency band, which can improve the pairing security and reduce the waste of resources.

For example, the non-standard working mode includes any one or a combination of the following: the second working mode, the third working mode, and the fourth working mode; the standard channel is obtained by dividing the standard frequency band, the The extended channel is obtained by dividing the extended extended frequency band; the standard frequency band corresponds to an upper limit frequency and a lower limit frequency, the extended frequency band includes a first frequency band and a second frequency band, and the frequencies in the first frequency band are all less than the lower limit frequency, The frequencies in the second frequency band are all greater than the upper limit frequency. Considering that with the upper limit frequency as the reference, the higher the frequency, the worse the communication quality may be, and the lower limit frequency as the reference, the lower the frequency is, the lower the communication quality may be. Therefore, this application implements For example, in order to expand the same number of channels, the scheme of expanding the first frequency band and the second frequency band, compared with the scheme of expanding only one frequency band, is conducive to maintaining the communication quality at a relative level while increasing the number of expanded channels. within the range of balance.

For example, the number of each standard channel divided based on the standard frequency band is a continuous number, and the continuous number includes an initial number and a termination number; the number of the channel divided based on the first frequency band, as the frequency decreases The initial number decreases sequentially based on the reference; the number of the channels divided based on the second frequency band increases sequentially with the termination number as the reference as the frequency increases. Considering that the standard channels already have consecutive numbers in the related art, in the embodiment of the present application, the standard channels and the extended channels can be consecutively numbered without renumbering the standard channels, which is convenient to adapt to the existing channel numbering specifications, and the operation efficiency is improved. High, the speed is faster, that is, the channel after frequency hopping can be determined more quickly, thereby improving the speed of data transmission between chips. Moreover, considering that the existing adaptive frequency hopping algorithm is performed in the case of continuous numbering, the continuous numbering between the extended channel and the standard channel in the present application also facilitates adaptation to the existing adaptive frequency hopping algorithm.

Description of drawings

One or more embodiments are exemplified by the pictures in the corresponding drawings, and these exemplifications do not constitute limitations of the embodiments, and elements with the same reference numerals in the drawings are denoted as similar elements, Unless otherwise stated, the figures in the accompanying drawings do not constitute a scale limitation.

FIG. 1 is a flowchart of determining a channel after frequency modulation according to an embodiment of the present application;

Fig. 2 is a block diagram of determining the number of the channel after frequency hopping according to an embodiment of the present application;

3 is a flowchart of a data transmission method according to an embodiment of the present application when the first chip is a chip that sends a switching instruction;

4 is a flowchart of a data transmission method when the first chip in an embodiment of the present application is a chip that receives a switching instruction;

5 is a schematic diagram of data transmission performed by the first chip and the second chip in an embodiment of the present application;

6 is a flowchart of a data transmission method when the first chip is a chip that sends a switching instruction according to an example in the embodiments of the present application;

7 is a flowchart of a data transmission method according to another example in the embodiments of the present application, when the first chip is a chip that receives a switching instruction;

FIG. 8 is an interaction flow diagram between the first chip and the second chip according to an embodiment of the present application;

FIG. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

specific embodiment

In order to make the objectives, technical solutions and advantages of the present application clearer, some embodiments of the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood by those of ordinary skill in the art that, in each embodiment, many technical details are set forth in order for the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can be realized. The following divisions of the various embodiments are for the convenience of description, and should not constitute any limitation on the specific implementation of the present application, and the various embodiments may be combined with each other and referred to each other on the premise of not contradicting each other.

The embodiments of the present application relate to a data transmission method, which is applied to a first chip. The data transmission in the embodiments of the present application mainly refers to the data transmission between the first chip and the second chip. Wherein, the first chip is arranged in the master device, and the second chip is arranged in the slave device; or, the first chip is arranged in the slave device, and the second chip is arranged in the master device. That is to say, among the first chip and the second chip, one of them is set in the master device, and the other is set in the slave device, and the data transmission between the first chip and the second chip can also be understood as the master device and the slave device. data transfer between. Both the first chip and the second chip may be Bluetooth chips. The implementation details of the data transmission method in this embodiment will be specifically described below, and the following content is only provided for the convenience of understanding, and is not necessary for implementing this solution.

In this embodiment, the working modes supported by the first chip and the second chip during data transmission include a standard working mode and a non-standard working mode. That is to say, the working modes of the first chip and the second chip include: a standard working mode and a non-standard working mode. The standard working mode and non-standard working mode are described in detail below:

The standard working mode is a working mode in which data is transmitted with the second chip in a frequency hopping manner between standard channels based on the standard Bluetooth protocol. It can be understood that the standard frequency band of the existing standard Bluetooth protocol is the 2.4G ISM frequency band, that is, 2400Mhz-2480Mhz, with a total of 80Mhz. The channels are divided according to the 2Mhz width to obtain 40 standard channels. The standard working mode can be understood as the working mode used by the existing low-power Bluetooth technology, that is, the working mode of adaptive frequency hopping between the standard frequency bands specified by the standard Bluetooth protocol, that is, in the above 40 standard channels. The working mode of adaptive frequency hopping between them. The adaptive frequency hopping refers to that the first chip and the second chip continuously update the channel used for communication between the two parties according to the same adaptive frequency hopping algorithm. The adaptive frequency hopping method may be implemented based on the adaptive frequency hopping algorithm specified in the Bluetooth core protocol Core_v5.2, which is not described in detail in this embodiment.

The non-standard working mode is a working mode based on a self-defined private protocol, including any one of the following or a combination thereof: a first working mode in which data is transmitted with the second chip in the specified first fixed channel; wherein the first A fixed channel is one of the standard channels. A second working mode in which data is transmitted with the second chip in a frequency hopping manner between the extended extension channels. A third working mode in which data is transmitted with the second chip in the designated second fixed channel; wherein the second fixed channel is one of the extended extended channels. A fourth working mode for transmitting data with the second chip in a frequency hopping manner between a standard channel based on a standard Bluetooth protocol and an extended extended channel. The above four non-standard working modes are described in detail below:

In the first working mode, the first chip and the second chip transmit data in a designated first fixed channel, and the first fixed channel is one of the standard channels, that is, one of the above 40 standard channels. Transmission of data in the specified first fixed channel can be understood as the first chip and the second chip have been transmitting data in the first fixed channel within a preset period of time, that is, the channel for transmitting data within the preset period of time is not will change.

The applicable scenarios of the first working mode may include, but are not limited to: within a preset range, the number of devices that need to transmit data is less than the preset number. The preset range and the preset number can be set according to actual needs, for example, the preset range can be within 5 meters or within one room. That is to say, in the scenario where there are few devices within the preset range, each device can be assigned a channel, and each device can transmit data in the designated channel. In the case of a small number of devices, 40 standard channels are enough to specify, which is conducive to improving data transmission. efficiency.

In an example, the first fixed channel can be selected by those skilled in the art from multiple standard channels according to actual needs, which is beneficial to realize the customization of the channels. For example, an application program interface (Application Program Interface, API) can be provided externally for the first chip and the second chip, so that those skilled in the art can select a channel as the first fixed channel through the API.

In another example, the first fixed channel can also be uniformly assigned and designated by the central device according to the connection conditions between the devices, which is beneficial to automatically and reasonably realize the designation of the channel. For example, among multiple devices in the Bluetooth low energy network, a device can be pre-designated as the central device, and the central device can be used to coordinate the allocation and use of channels, and allocate channels for each device in the Bluetooth low energy network, so that There is no interference in data transmission between devices. For example, multiple devices under the Bluetooth low energy network include the central device, device 1 to device 8, and the central device determines that device 1 has established Bluetooth connections with devices 2, 3, and 4, respectively, that is, device 1 will communicate with devices 2, 3, and 4 respectively. 4 for data transmission. The central device determines that the device 5 has established a Bluetooth connection with the devices 6, 7, and 8 respectively, that is, the device 5 will perform data transmission with the devices 6, 7, and 8. Then the designated result of the channel designation performed by the central device for each device may be: channel 1, channel 2, and channel 3 are respectively designated for data transmission between device 1 and devices 2, 3, and 4; for device 5 and devices 6, 7 Channel 4, Channel 5, and Channel 6 are designated for data transmission between , 8, respectively, to ensure that the data transmission between each device does not interfere with each other, and the communication quality is higher. The above-mentioned device 1 may be provided with a first chip, and devices 2, 3, and 4 may be provided with a second chip respectively, and the central device may send the designation result for the device 1 to the first chip, so that the device 1 can be based on the received designation. As a result, it is determined which channels should be used for data transmission with devices 2, 3, and 4, respectively. In the specific implementation, the device 1 itself can also have the function of the central device, that is, the device 1 can also be used as the central device. At this time, the device 1 can directly determine which channels should be used for data transmission with the devices 2, 3, and 4 respectively.

In a specific implementation, if the non-standard working mode only includes the first working mode, that is, there is no extended channel, if the first chip and the second chip work in the first working mode, the use state of the first fixed channel is set to allow Use, the use status of the other channels except the first fixed channel in the standard channel is set to be disabled. For example, 40 standard channels can be represented by 5Byte (40bit) 0xFFFFFFFFFF, setting 0 means that the usage status of the channel is disabled, and setting 1 means that the usage status of the channel is enabled.

In order to facilitate the understanding of the second, third, and fourth working modes, the extended channels involved in these three working modes are first described below: the extended channels are obtained based on the extended extended frequency band division, and the extended frequency band is outside the 2.4G ISM frequency band. other frequency bands.

In an example, the extended extended frequency band may include: a first frequency band and a second frequency band. The standard frequency band based on the standard Bluetooth protocol corresponds to an upper limit frequency and a lower limit frequency, the frequencies in the first frequency band are all less than the lower limit frequency, and the frequencies in the second frequency band are all greater than the upper limit frequency. Considering that with the upper limit frequency as the reference, the higher the frequency, the worse the communication quality may be, and the lower limit frequency as the reference, the lower the frequency, the lower the communication quality may be. Therefore, in order to extend the Compared with the scheme of expanding only one frequency band, the scheme of extending the first frequency band and the second frequency band with the same number of channels is beneficial to maintain the communication quality in a relatively balanced range while increasing the number of channels to be expanded. Inside.

For example, the standard frequency band specified by the standard Bluetooth protocol is [2400Mhz, 2480Mhz], the first frequency band is 2360Mhz to 2400Mhz, and the second frequency band is 2480Mhz to 2520Mhz. The first frequency band can be expressed as [2360Mhz, 2400Mhz), and the second frequency band can be expressed as (2480Mhz, 2520Mhz]. Assuming that the extended channel is divided according to the width of 2Mhz, the first and second frequency bands expanded in this example can be divided into 40 extended channels. If only one frequency band is expanded, in order to obtain 40 channels, only the frequency band [2320Mhz, 2400Mhz] may be expanded, or only the frequency band (2480Mhz, 2560Mhz) may be expanded. It can be seen that in order to expand out There are 40 channels. In this example, two frequency bands are expanded. Compared with the method of expanding only one frequency band, it is beneficial to increase the number of expanded channels while maintaining the communication quality within a relatively balanced range. .

In another example, the extended frequency band extended according to actual needs may also include only the first frequency band or only the second frequency band, which is beneficial to adapt to individual requirements in practical applications.

In a specific implementation, each standard channel and each extended channel may be set with numbers.

In an example, considering that in the related art, the number of standard channels is usually 0-39, the relationship between the number and frequency can be expressed by the following formula: f=2402+K*2; where, f is the frequency (unit: Mhz) , K is the number, K=0～39. In this embodiment, an extended extension channel is added, and the extension channel can be numbered on the basis of the numbers of the existing 40 standard channels. The numbering rule may be: the number of the channels divided based on the first frequency band decreases sequentially with the initial number as the reference; for example, the channel less than 2400Mhz uses a negative number, which is -1 to -20 in sequence. The number of the extended channel divided based on the second frequency band increases sequentially with the increase of the frequency based on the termination number; for example, the number of the channel greater than 2400Mhz continues to increase based on the number of 39, and is 40 to 59 in sequence. That is, the relationship between the number of the channel and the frequency can be expressed by the following formula: f=2402+K*2; wherein, f is the frequency (unit: Mhz), K is the number, and K=-20～59. For example, the relationship between the number of the standard channel and the frequency of the standard frequency band, and the relationship between the number of the extended channel and the frequency of the extended frequency band can be shown in Table 1 below:

Table 1

Band name	Frequency Range	channel number
The first frequency band (Low band)	2360Mhz～2400Mhz	-20～-1
Standard frequency band (BLE band)	2402Mhz～2480Mhz	0～39
Second frequency band (High band)	2480Mhz～2520Mhz	40～59

In the above example, considering that the standard channels in the related art already have consecutive numbers, in the embodiment of the present application, the standard channels and the extended channels can be consecutively numbered without renumbering the standard channels, which is convenient to adapt to the existing channel numbering specifications, The operation efficiency is higher and the speed is faster, that is, the channel after the frequency hopping can be determined more quickly, thereby improving the speed of data transmission between chips. Moreover, considering that the existing adaptive frequency hopping algorithm is performed in the case of continuous numbering, the continuous numbering between the extended channel and the standard channel in the present application also facilitates adaptation to the existing adaptive frequency hopping algorithm. Wherein, the existing adaptive frequency hopping algorithm may be the channel selection algorithm 1 (Channel Selection algorithm#1) or the channel selection algorithm 2 (Channel Selection algorithm#2) specified in the Bluetooth core protocol Core_v5.2.

In another example, the standard channels can also be renumbered, that is, both the standard channels and the extended channels are numbered. For example, the frequency range of the channel is 2360Mhz-2520Mhz, a total of 160Mhz, divided into 80 channels, and the channel numbers are 0 to 79, that is, the relationship between the channel number and frequency can be expressed by the following formula: f=2362+K*2; where, f is the frequency (unit: Mhz), K is the serial number, K=0～79. In this case, considering that the channels between 2402Mhz and 2480Mhz have been set with numbers 0 to 39 in the related art, a corresponding relationship can be set to avoid conflicts: in the channels numbered 0 to 79, the channels are numbered 20 to 59. The channel is actually the channel numbered 0 to 39 divided based on 2402Mhz to 2480Mhz in the related art.

The second, third, and fourth operating modes involving extended channels are described below:

In the second working mode, the first chip and the second chip transmit data in a frequency hopping manner between the extended extended channels. For example, the extended channels are channels numbered -1 to -20 and channels numbered 40 to 59, that is, the channels through which the first chip and the second chip transmit data within a preset period of time are numbered -1 to -20 and numbered 40 to 59. 40 to 59 channels vary.

The applicable scenarios of the second working mode may include but are not limited to: the known interference of the ISM frequency band needs to be avoided, and there are multiple different networks within the preset range. In this scenario, the first chip and the second chip work In the second working mode, it is beneficial to avoid the interference of the ISM frequency band, thereby improving the stability of data transmission. Among them, the preset range can be set according to actual needs, such as within 5 meters or within 1 room.

In a specific implementation, if the first chip and the second chip work in the second working mode, since this embodiment is compatible with the standard Bluetooth protocol, that is, when the extended channel exists, the standard channel also exists. Therefore, in the second working mode, the standard The usage status of the channel can be set to disabled. For example, the above-mentioned 80 channels numbered from -20 to 59 can be represented by 10Byte (80bit) 0xFFFFFFFFFFFFFFFFFFFF, and the usage status of the 40 standard channels numbered from 0 to 39 is set to disable, numbered from -20 to -1 and 40. The usage status of 40 extended channels of ~59 is set to enable.

In the third working mode, the first chip and the second chip transmit data in a designated second fixed channel, and the second fixed channel is one of the extended channels, such as channels numbered -1 to -20 and channels numbered 40 to 59 one of the. The transmission of data in the specified second fixed channel can be understood as the fact that the first chip and the second chip have been transmitting data in the second fixed channel within a preset period of time, that is, the channel for transmitting data within the preset period of time is not will change.

The applicable scenarios of the third working mode may include but are not limited to: the known interference of the ISM frequency band needs to be avoided, and there is one network within the preset range. In this scenario, the first chip and the second chip work in the first Three working modes are beneficial to avoid the interference of the ISM frequency band, thereby improving the stability of data transmission. Moreover, since the data is transmitted in the designated second fixed channel, it is also beneficial to improve the efficiency of data transmission.

In a specific implementation, if the first chip and the second chip work in the third working mode, the use status of the second fixed channel is set to allow use, and the use status of other channels in the extended channel except the second fixed channel is set to Set to disable. It can be understood that, because the present embodiment is compatible with the standard Bluetooth protocol, that is, the extended channel exists and the standard channel also exists, therefore, the use state of the standard channel in the third working mode is also set to prohibit use. For example, the above 80 channels numbered from -20 to 59 can be represented by 10Byte (80bit) 0xFFFFFFFFFFFFFFFFFFFF, setting 0 to indicate that the channel's usage status is disabled, and setting 1 to indicate that the channel's usage status is enabled.

The designation method of the second fixed channel is similar to the designation method of the first fixed channel above, except that the designated range of the second fixed channel is the extended channel, and the designated range of the first fixed channel is the standard channel. Repeat, the designation manner of the second fixed channel will not be repeated here.

It can be understood that the common point of the first working mode and the third working mode is that both support the first chip and the second chip to transmit data in a designated fixed channel. In the prior art, both communication parties perform adaptive frequency hopping on 40 standard channels, and cannot be assigned to a fixed channel. If multiple devices that need to perform data transmission hop to the same channel at the same time in the process of adaptive frequency hopping of 40 standard channels, it may cause interference to data transmission between devices and affect the efficiency of data transmission. However, in this embodiment, both parties in the communication are supported to work in the first working mode or the third working mode, and different channels can be specified for different devices, so that data transmission between multiple devices can be performed according to the specified fixed channel, that is, both parties in the communication can perform data transmission. Identifying which channel should be used for transmission is beneficial to avoid frequency hopping of multiple devices to the same channel during adaptive frequency hopping, thereby avoiding transmission interference between multiple devices and improving the efficiency of data transmission.

In the fourth working mode, the first chip and the second chip transmit data in a frequency hopping manner between the standard channel based on the standard Bluetooth protocol and the extended extended channel. In an example, it can be seen from Table 1 that the frequency range of the channels is 2360Mhz-2520Mhz, a total of 160Mhz, which are divided into 80 channels, and the channel numbers are -20 to 59. In the fourth working mode, the first chip and the second chip can frequency hop between 80 channels numbered -20 to 59, that is, within a preset period of time, the channel through which the first chip and the second chip transmit data is Changes in channels numbered -20 to 59.

Applicable scenarios of the fourth working mode may include, but are not limited to: scenarios with high network density of Bluetooth low energy consumption. Considering that in the prior art, in a scenario with a high density of low-power bluetooth network, multiple devices perform adaptive frequency hopping on 40 channels, and the pressure of data transmission is relatively high. In this embodiment, multiple devices are supported to perform adaptive frequency hopping on more than 40 channels (such as the above-mentioned 80 channels), and the data transmission pressure in the 40 channels is averaged in more channels, for example, an average of 80 In each channel, it is beneficial to ease data transmission, thereby improving the stability of data transmission to a certain extent, and can also support more devices in the same network topology for data transmission. In addition, compared with the adaptive frequency hopping within 40 channels in the prior art, the expansion of channels is added in this embodiment, which is beneficial to improve the concurrent capacity of network communication, and can support more devices in the same network topology. Data transmission needs of multiple devices.

In a specific implementation, when the first chip and the second chip work in the fourth working mode, for example, data transmission is performed in 80 channels numbered from -20 to 59 in an adaptive frequency hopping manner, and the usage status of the 80 channels is Both are set to allow the use of enable.

It can be understood that the common point of the second working mode and the fourth working mode is that both are a frequency hopping working mode, and the difference is that the frequency hopping range is different. In an example, in the second working mode or the fourth working mode, the frequency-hopping channel is determined in the following manner, referring to FIG. 1 , including:

Step 101: Determine a frequency hopping step value according to the access address allocated by the first chip to the second chip.

Step 102: Determine the channel after frequency hopping according to the frequency hopping step value and the total number of channels.

The total number of channels is the sum of the number of standard channels and the number of extended channels. It can be understood that when the first chip and the second chip perform data transmission in an adaptive frequency hopping manner, the channel after the frequency hopping will be determined. Therefore, the above steps 101 to 102 are the first chip and the second chip. The steps that are performed in the process of adaptive frequency hopping. The following describes the process of determining the channel after frequency hopping by the first chip:

After the first chip and the second chip establish a Bluetooth connection, the first chip assigns an access address Access Address to the second chip, and both the first chip and the second chip can store the access address. The first chip determines the channel identifier channelIdentifier according to the access address. The first chip determines the current connection event count value counter, and then determines the frequency hopping step value according to the channel identification code and the connection event count value. The first chip performs a modulo operation on the frequency hopping step value A and the total number B of channels supported by the frequency hopping working mode, that is, A mod B, and determines the channel after the frequency hopping according to the result of the modulo operation.

In an example, it is assumed that the total number of channels is 80. To further facilitate the understanding of the above process, reference may be made to FIG. 2 , which is a block diagram of determining the number of channels after frequency hopping. Among them, after the channel identification code channelIdentifier and the connection event count value counter are input into the pseudo random number generator Pseudo Random Number Generator, the pseudo random number generator outputs the frequency hopping step value, and then the modulo operation is performed on the frequency hopping step value and 80. Get the number of the unmapped channel unmappedChannel. If the usage state of the unmapped channel is enable, the unmapped channel is directly used as the channel after frequency hopping; if the usage state of the unmapped channel is disabled, the hops are remapped in each channel whose usage state is enable. frequency channel.

It should be noted that the above adaptive frequency hopping process is equivalent to a further improvement of the channel selection algorithm 2 (Channel Selection algorithm#2) specified in the Bluetooth core protocol Core_v5.2. The improvement lies in the original algorithm 2 used in mod 37, updated to mod 80, so that the output results fall within the range of 0 to 79 (corresponding to channels numbered -20 to 59).

It should be noted that, the above-mentioned frequency hopping process is only taken as an example in the manners in FIGS. 1 and 2 , and is not limited to this in the specific implementation. For example, it is also possible to further improve the channel selection algorithm 1 (Channel Selection algorithm #1) specified in the Bluetooth core protocol Core_v5.2, and update the mod37 used in the original algorithm 1 to mod 80.

In one example, the first chip is the chip that sends the switching instruction, and the second chip is the chip that receives the switching instruction. The flowchart of the data transmission method applied to the first chip can refer to FIG. 3, including:

Step 301: If a preset trigger condition is satisfied, send a switching instruction to the second chip.

Step 302: Switch the current working mode of the first chip to the target working mode at the switching time point.

The switching instruction carries the switching time point and the target operating mode, and the switching instruction is used to instruct the second chip to switch the current operating mode of the second chip to the target operating mode at the switching time point. That is to say, the first chip and the second chip switch their respective current working modes to the target working modes at the same switching time point.

In another example, the first chip is the chip that receives the switching instruction, and the second chip is the chip that sends the switching instruction. For a flowchart of the data transmission method applied to the first chip, reference may be made to FIG. 4 , including:

Step 401: Receive a switching instruction sent by the second chip when a preset trigger condition is met.

Step 402: Switch the current working mode of the first chip to the target working mode at the switching time point.

The switching instruction carries the switching time point and the target working mode, and the second chip switches the current working mode of the second chip to the target working mode at the switching time point.

The current working mode and the target working mode mentioned in step 302 and step 402 are two different working modes in a standard working mode and a non-standard working mode. For example, the working modes supported by the first chip and the second chip include the standard working mode and the above-mentioned 4 non-standard working modes, that is, a total of 5 working modes are supported, and the current working mode and the target working mode are any of the 5 working modes. two kinds.

In one example, one of the two different operating modes is the standard operating mode. That is, either the current working mode is the standard working mode, or the target working mode is the standard working mode, that is, the first chip and the second chip can switch between the standard working mode and the non-standard working mode. Considering that the chips of most manufacturers support the standard working mode, such a switching method is beneficial to the chips produced by more manufacturers.

In one example, the current working mode is the standard working mode, and the target working mode is any one of the first, second, third, and fourth working modes above. The specific target working mode can be determined according to the actual scene in which the first chip and the second chip are located and the applicable scene of the above-mentioned four non-standard working modes. For example, if the actual scene in which the first chip and the second chip are located is a scene with high Bluetooth low energy network density, the target working mode is the fourth working mode.

In another example, the current working mode is any one of the four non-standard working modes, and the target working mode is the standard working mode. That is, the working modes of the first chip and the second chip can be switched between the standard working mode and the non-standard working mode.

In this embodiment, the first chip and the second chip not only support the standard Bluetooth protocol, but also support the newly added link control protocol, that is, the self-defined private protocol based on the non-standard working mode mentioned above. The first chip may send a switching instruction to the second chip based on the newly added link control protocol, where the switching instruction may be a protocol data unit (Protocol Data Unit, PDU) data packet.

In an example, the fields of the above-mentioned PDU data packet may include: an operation code (Operation Code, OPcode), a switching time point (instant), a sequence number (Mode) of a target working mode, and a number (Ch) of a designated channel. The above fields are described in detail below:

Operation code (OPcode): It is used to describe the part of the machine code in the machine language instruction that specifies the operation to be performed. The value of OPcode in this embodiment is used to indicate that the PDU data packet is a switching command. Among them, the value of OPcode can be selected from the values that have not been used in the standard Bluetooth protocol, so as to avoid conflicts with other instructions in the existing standard Bluetooth protocol; for example, the value of OPcode in this embodiment can be set to 0XDF. It can be understood that the second chip may receive many PDU data packets. If the second chip recognizes that the OPcode value is 0XDF in a PDU data packet, it can be determined that the PDU data packet is actually a switching command.

Switching time point (instant): It is used to indicate at which time point the first chip and the second chip should switch the working mode together. The switching time point is usually set to the current evt cnt+n, and evt cnt is the count value of the current communication times. , when the two chips just establish a communication connection, the count value of the current communication times is 0. n can be set by those skilled in the art according to actual needs, for example, set to 6. In specific implementation, those skilled in the art can set the value of the above n through APIs provided externally by the first chip and the second chip. It can be understood that, after the first chip and the second chip are connected, the counter starts timing, and each time a communication interval elapses with a duration evt cnt+1, where the communication interval duration is a predetermined fixed value. The current evt cnt+n can be understood as the time after the end of the nth communication interval in the future from the current time.

The serial number of the target working mode (Mode): The value of Mode can be: 0, 1, 2, 3, 4; where 0 represents the standard operating mode (referred to as Mode 0), and 1 represents the first operating mode (referred to as Mode 1) , 2 represents the second operating mode (referred to as mode 2), 3 represents the third operating mode (referred to as mode 3), and 4 represents the fourth operating mode (referred to as mode 4).

Designated channel number (Ch): when the target working mode is the first working mode, Ch is the number of the first fixed channel; when the target working mode is the third working mode, Ch is the number of the second fixed channel. That is, if the target working mode is the first working mode, the switching instruction also carries the number of the first fixed channel; if the target working mode is the third working mode, the switching instruction also carries the number of the second fixed channel.

In one example, if the working modes of the first chip and the second chip do not include the first working mode or the third working mode, the field of the above-mentioned PDU data packet may not include the above-mentioned number (Ch) of the designated channel, It is beneficial to reduce the amount of data in the PDU data packet and improve the transmission efficiency of the PDU data packet, that is, the switching instruction. However, in a specific implementation, if the working modes of the first chip and the second chip do not include the first working mode or the third working mode, the field of the above-mentioned PDU data packet may also include the above-mentioned number of the designated channel (Ch ), in this case, the value of the specified channel number (Ch) field can be ignored, that is, no matter what the value of the specified channel number (Ch) field is, the chip that receives the PDU data packet ignores this field value of . In this case, even if the first working mode or the third working mode is added to the working modes of the first chip and the second chip according to actual needs, there is no need to add a field in the PDU data packet, which improves the increase of the first working mode or the third working mode. The convenience of the working modes of one chip and the second chip.

In an example, the working modes of the first chip and the second chip include the above five types, namely mode 0, mode 1, mode 2, mode 3, and mode 4, and the fields of the PDU data packet include the above four fields. When the target working mode is Mode 0, Mode 2 or Mode 4, the chip that receives the PDU data packet can ignore the value of the specified channel number (Ch) field.

In a specific implementation, the switching of the operating modes between the first chip and the second chip may include: switching between mode 0 and mode 1, switching between mode 0 and mode 2, and switching between mode 0 and mode 3 , switching between mode 0 and mode 4, that is, switching between the standard working mode and the non-standard working mode, so that it can meet the data transmission requirements in different scenarios while being compatible with the standard Bluetooth protocol.

Optionally, according to actual needs, the first chip and the second chip can also be switched between different non-standard working modes.

In an example, the non-standard working mode includes at least any one or more of the second, third, and fourth working modes, that is, the extended channel and the standard channel coexist. The following takes the output frequency supported by the first chip and the second chip as 2360Mhz to 2520Mhz, and the numbers of the divided channels are -20 to 59 as an example to illustrate:

In an example, the target working mode is mode 0, and the first chip and the second chip switch the current working mode to mode 0, which can be understood as: the first chip and the second chip will switch the number of 0 to 36 at the switching time point at the same time. The usage status of the channel is set to enable, and the usage status of the channels numbered -20 to -1 and 37 to 59 is set to disable. Since the existing standard Bluetooth protocol stipulates that the three channels numbered 37 to 39 are channels used for broadcasting, during data transmission, the use state of the channels numbered 0 to 36 can be set to enable. The first chip and the second chip perform data transmission between the channels numbered 0 to 36 in an adaptive frequency hopping manner from the switching time point.

In an example, the target working mode is Mode 1, the number of the first fixed channel is 20, and the first chip and the second chip switch the current working mode to Mode 1, which can be understood as: the first chip and the second chip are switching at the same time At the time point, the usage status of the channel numbered 20 is set to enable, and the usage status of the other channels with numbers (-20 to 19, 21 to 59) is set to disable. The first chip and the second chip perform data transmission in the channel numbered 20 from the switching time point.

In an example, the target operating mode is mode 2, and the first chip and the second chip switch the current operating mode to mode 2, which can be understood as: the first chip and the second chip will be numbered -20～- at the switching time point at the same time. The usage states of channels 1 and 40 to 59 are set to enable, and the usage states of the remaining channels (0 to 39) are all set to disable. The first chip and the second chip perform data transmission in a frequency hopping manner between the channels numbered -20 to -1 and 40 to 59 from the switching time point.

In an example, the target operating mode is mode 4, and the first chip and the second chip switch the current operating mode to mode 4, which can be understood as: the first chip and the second chip will be numbered from -20 to 59 at the switching time point at the same time. The usage status of the channel is set to enable. The first chip and the second chip perform data transmission between the channels numbered -20 to 59 in an adaptive frequency hopping manner from the switching time point.

In an example, for a schematic diagram of data transmission between the first chip and the second chip, reference may be made to FIG. 5 . It is assumed that the first chip is set in the master device, the second chip is set in the slave device, and the number of times between the first chip and the second chip is The output frequency range of the frequency converter is 2360Mhz ~ 2520Mhz. The register can configure the output frequency of the frequency multiplier, and through the software configuration register, the frequency multiplier can output any frequency between 2360Mhz and 2520Mhz. For example, it is determined that the first chip and the second chip are currently transmitting data in the channel numbered 20, and the frequency corresponding to the channel numbered 20 is: f=2402+20*2=2442Mhz, then the software configuration register can control The frequency multiplier outputs 2442Mhz. The first chip modulates the baseband signal to be sent, modulates the baseband signal to 2442Mhz, and then transmits the modulated signal into the air by the antenna of the main device. After receiving the signal from the antenna of the device, the second chip performs a demodulation operation corresponding to the modulation operation of the first chip, thereby restoring the received signal to the baseband signal to be sent by the first chip.

In one example, the preset trigger condition is that the first chip receives preset trigger information. The preset trigger message can be set according to actual needs, and the trigger information can carry the switching time point and the target working mode. When the target working mode is Mode 1, the trigger information can also carry the number of the designated channel. Those skilled in the art can call the above-mentioned API, customize the switching time point and the target working mode according to actual needs, carry the customized switching time point and the target working mode in the trigger message and send it to the first chip.

Optionally, the trigger information may be key information, touch information, and the like. The following description takes the key information as an example: for example, the first chip is set in the main device, and the key information received by the first chip can be triggered by a key set on the main device. For another example, the key information received by the first chip may also come from a slave device, and when the slave device detects that a key on the slave device is pressed, the slave device sends key information to the first chip. Optionally, the key information received by the first chip may also come from a third-party device other than the master device and the slave device. When the third-party device detects that a key on the third-party device is pressed, the key information is sent to the first chip.

In one example, the preset trigger condition may be: the first chip detects that it is currently in a high-density low-power Bluetooth network transmission scenario. The manner in which the first chip detects a current high-density low-power Bluetooth network transmission scenario may be: in the process of the first chip detecting the current communication, the received signal strength indicator (Received signal strength indicator, RSSI) is greater than a preset strength threshold. The duration is greater than the preset duration threshold, and the packet loss rate within the preset duration threshold is greater than the preset packet loss rate threshold. Among them, the preset intensity threshold, preset duration threshold and preset packet loss rate threshold can be set according to actual needs, which are intended to indicate that the RSSI of the first chip is always strong in the current communication process, but packet loss always occurs. Happening. Under this trigger condition, the target working mode is the fourth working mode suitable for the high-density transmission scenario of the Bluetooth low energy network.

It should be noted that the above examples in this embodiment are all examples for the convenience of understanding, and do not limit the technical solutions of the present invention.

The embodiments of the present application provide switchable working modes for the first chip and the second chip, which is beneficial to meet data transmission requirements in different scenarios. Since the standard working mode is a working mode in which data is transmitted between the standard channels based on the standard Bluetooth protocol and the second chip in a frequency hopping manner, that is, the first chip and the second chip can be compatible with the existing standard Bluetooth protocol while supporting other The non-standard working mode is beneficial to expand the scope of application of the first chip and the second chip while meeting the data transmission requirements in different scenarios, so that the audience of the first chip and the second chip is wider.

In an example, based on the above content, the first chip is the chip that sends the switching instruction, and the second chip is the chip that receives the switching instruction. The flowchart of the data transmission method applied to the first chip may be shown in FIG. 6 , including:

Step 601: It is determined that the first chip is in a state in which a Bluetooth connection has been established with the second chip and the Bluetooth pairing has not been performed, and a switching instruction is sent to the second chip.

Step 602: Switch the current working mode of the first chip to the target working mode at the switching time point.

In another example, based on the above content, the first chip is the chip that receives the switching instruction, and the second chip is the chip that sends the switching instruction. The flowchart of the data transmission method applied to the first chip may be shown in FIG. 7 , including:

Step 701: Receive a switching instruction sent by the second chip when it is determined that the second chip is in a state in which a Bluetooth connection has been established with the first chip and a Bluetooth pairing has not been performed.

Step 702: Switch the current working mode of the first chip to the target working mode at the switching time point.

The target working mode mentioned in step 602 and step 702 is the second working mode or the third working mode.

In step 601 and step 701, the Bluetooth connection established between the first chip and the second chip may be a low-power Bluetooth connection established based on mode 0. Based on the existing standard Bluetooth protocol, after the low-power Bluetooth connection is established, the first chip and the second chip will enter the Bluetooth pairing process. During the Bluetooth pairing process, the pairing parties will exchange secret keys. In this embodiment, it is considered that most of the current monitoring devices support the standard Bluetooth protocol, and it is easy to monitor the standard frequency band specified by the standard Bluetooth protocol, so it is easy to steal the secret key in the process of Bluetooth pairing. Therefore, in this embodiment, if the sending switch The chip that sends the instruction (the first chip or the second chip) determines that the first chip is in a state where the Bluetooth connection has been established with the second chip and the Bluetooth pairing has not yet been performed. In the process of Bluetooth pairing, the first chip and the second chip exchange secret keys based on the standard frequency band of the standard Bluetooth protocol, thereby preventing the secret keys from being stolen.

In an example, it is determined that the first chip is in a state in which a Bluetooth connection has been established with the second chip and the Bluetooth pairing has not yet been performed, which can be understood as: after the first chip sends a security request to the second chip The pairing request sent by the second chip is received.

In another example, it is determined that the first chip is in a state where the Bluetooth connection has been established with the second chip and the Bluetooth pairing has not been performed, which can also be understood as: after the first chip receives the security request sent by the second chip, the A chip has not sent a pairing request to the second chip. That is to say, after the first chip receives the Security request and sends the Pairing request, the first chip sends a switching instruction to the second chip, so that the first chip and the second chip can switch the working mode to the target operation at a reasonable time. model.

Taking the 80 channels obtained in Table 1 after expansion as an example, the following describes the case where the target operating mode is the second operating mode (mode 2) or the third operating mode (mode 3):

When the target working mode is mode 2, the first chip and the second chip perform data transmission in the first fixed channel, which means that the first chip and the second chip perform the key exchange of Bluetooth pairing in the first fixed channel. The key exchange is performed in the channels 0 to 39, so as to avoid the working frequency band of the standard Bluetooth protocol that can be monitored by the third-party monitoring device, so as to improve the security in the pairing process.

When the target working mode is mode 3, the first chip and the second chip perform the key exchange of Bluetooth pairing in an adaptive frequency hopping mode on the extended channel, so that even the adaptive frequency hopping method can avoid third-party monitoring The device can monitor the working frequency band of the standard Bluetooth protocol to improve the security during the pairing process.

In an example, if the first chip is the chip that sends the switching instruction, after the first chip sends the switching instruction to the second chip, the method further includes: if the first chip determines to complete the Bluetooth pairing with the second chip, sending the switching instruction to the second chip. a restoration instruction; wherein, the restoration instruction carries a restoration time point, and the restoration instruction is used to instruct the second chip to restore the target working mode of the second chip to the working mode before switching at the restoration time point; the first chip restores the first chip at the restoration time point The target working mode of the chip is restored to the working mode before the switch.

In another example, if the first chip is the chip that receives the switching instruction, after the first chip receives the switching instruction sent by the second chip when the preset trigger condition is met, the method further includes: the first chip receiving the second chip in Determine the restoration instruction sent after completing the Bluetooth pairing with the first chip; wherein, the restoration instruction carries the restoration time point; the first chip restores the target working mode of the first chip to the working mode before the switch at the restoration time point; wherein, the second The chip restores the target working mode of the second chip to the working mode before switching at the restoration time point.

That is, in this embodiment, after the Bluetooth pairing is completed, the first chip and the second chip restore the current target working mode to the working mode before switching at the same restoration time point. In one example, the working mode before switching is the standard working mode or the first working mode, considering that the extended frequency band is not an unlicensed ISM frequency band that is open to three major institutions of industry, science and medicine by the Radiocommunication Bureau of the International Communications Union, Long-term occupation may cause waste of resources. Therefore, after the pairing is completed, it returns to the standard working mode or the first working mode, that is, the working mode that does not occupy the extended frequency band, which can improve the pairing security and reduce the waste of resources. In another example, if one of the two different working modes, the target working mode and the current working mode mentioned in step 602 and step 702 is the standard working mode, the current working mode is the standard working mode, that is, switching The previous working mode is the standard working mode.

In an example, the interaction flow between the first chip and the second chip can refer to FIG. 8 , including:

Step 801 : The first chip and the second chip establish a Bluetooth low energy connection based on mode 0.

In one example, the non-standard operating modes include only mode 1, ie, no extension channels are present. When the first chip and the second chip establish a low-power Bluetooth connection, the usage states of the channels numbered 37 to 39 are set to disable, that is, the usage states of the channels used for broadcasting are set to disable, numbered 0 to 0. The usage status of 36 channels are all set to enable.

In another example, the non-standard working mode includes at least any one of mode 2, mode 3, and mode 4, that is, the standard channel and the extended channel coexist. When the first chip and the second chip establish a low-power Bluetooth connection, the usage status of the channels numbered -20 to -1 and 37 to 59 are set to disable, that is, the usage status of the channel used for broadcasting and the extended channel All are set to disable, and the usage status of channels numbered 0 to 36 are all set to enable.

Step 802: Initiate a security request.

Wherein, the first chip may initiate the security request, or the second chip may initiate the security request.

Step 803: The first chip sends a switching instruction to the second chip.

In a specific implementation, the second chip may also send a switching instruction to the first chip.

Step 804: The first chip and the second chip switch the mode 0 to the target operating mode at the same switching time point.

Wherein, the target working mode is mode 2 or mode 3.

Step 805: Initiate a pairing request, and perform pairing based on a security management protocol (Security Manager Protocol, SMP for short).

Step 806: Key distribution is performed between the first chip and the second chip to complete the key exchange.

The method of pairing based on SMP is traditional pairing or secure connection. In step 805 and step 806, the first chip and the second chip perform data transmission based on mode 2 or mode 3, which can be understood as performing data transmission in other frequency bands than the standard frequency band specified by the standard Bluetooth protocol. If the standard frequency band specified by the standard Bluetooth protocol is called the BLE in-band frequency band, the extended frequency band can be called the BLE out-of-band frequency band, that is, the first chip and the second chip in steps 805 and 806 perform data transmission in the BLE out-of-band frequency band .

Step 807: The first chip sends a restore instruction to the second chip.

Step 808: The first chip and the second chip restore the target working mode to mode 0 at the same restoration time point.

The first chip and the second chip are equivalent to returning to the working mode based on the standard Bluetooth protocol after completing the key exchange.

As can be seen from FIG. 8 , in this embodiment, compared with the existing Bluetooth pairing process, a switching instruction and a restoring instruction are inserted before pairing and after pairing, respectively. Wherein, both the handover instruction and the restoration instruction may be sent based on the link control protocol newly added in this application (the above-mentioned self-defined private protocol). By inserting a switching instruction and a restoring instruction before pairing and after pairing, respectively, the pairing security can be improved while being compatible with the existing working mode based on the standard Bluetooth protocol. Considering that the extended frequency band is not the frequency band specified by ISM, long-term occupation may cause waste of resources. Therefore, after the pairing is completed, it returns to the working mode based on the standard Bluetooth protocol, which can improve the pairing security and reduce the waste of resources.

The steps of the above various methods are divided only for the purpose of describing clearly. During implementation, they can be combined into one step or some steps can be split and decomposed into multiple steps. As long as the same logical relationship is included, they are all within the protection scope of this patent. ;Adding insignificant modifications to the algorithm or process or introducing insignificant designs, but not changing the core design of the algorithm and process are all within the scope of protection of this patent.

The embodiment of the present application relates to a first chip. As shown in FIG. 9 , the first chip 901 is located in an electronic device and is connected to a memory 902 in the electronic device. The memory 902 stores instructions that can be executed by the first chip 901 , The instructions are executed by the first chip 901, so that the first chip 901 can execute the above-mentioned data transmission method applied to the first chip.

The memory 902 and the first chip 901 are connected by a bus, the bus may include any number of interconnected buses and bridges, and the bus connects one or more first chips 901 and various circuits of the memory 902 together. The bus may also connect together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides the interface between the bus and the transceiver. A transceiver may be a single element or multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other devices over a transmission medium. The data processed by the first chip 901 is transmitted on the wireless medium through the antenna, and further, the antenna also receives the data and transmits the data to the first chip 901 .

The first chip 901 is responsible for managing the bus and general processing, and may also provide various functions, including timing, peripheral interface, voltage regulation, power management, and other control functions. And the memory 902 may be used to store data used by the first chip 901 when performing operations.

The embodiment of the present application relates to an electronic device, as shown in FIG. 9 , including: a first chip 901 in the third embodiment, and a memory 902 connected to the first chip 901 .

The embodiments of the present application relate to a computer-readable storage medium, storing a computer program, and when the computer program is executed by a processor, the foregoing method embodiments are implemented.

That is, those skilled in the art can understand that all or part of the steps in the method for implementing the above embodiments can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium and includes several instructions to make a device ( It may be a single chip microcomputer, a chip, etc.) or a processor (processor) 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 (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .

Those of ordinary skill in the art can understand that the above-mentioned embodiments are specific embodiments for realizing the present invention, and in practical applications, various changes can be made in form and details without departing from the spirit and the spirit of the present invention. scope.

Claims (20)

1. A data transmission method, characterized in that it is applied to a first chip, and the working modes supported by the first chip and the second chip during the data transmission process include a standard working mode and a non-standard working mode;

   The standard working mode is a working mode in which data is transmitted with the second chip in a frequency hopping manner between standard channels based on the standard Bluetooth protocol;

   The non-standard working mode includes any one of the following or a combination thereof:

   A first working mode in which data is transmitted with the second chip in a designated first fixed channel; wherein, the first fixed channel is one of the standard channels;

   A second working mode for transmitting data with the second chip in a frequency hopping manner between the extended extension channels;

   A third working mode for transmitting data with the second chip in a designated second fixed channel; wherein the second fixed channel is one of the extended extended channels;

   A fourth working mode for transmitting data with the second chip in a frequency hopping manner between a standard channel based on a standard Bluetooth protocol and an extended extended channel.
2. The data transmission method according to claim 1, wherein, if the first chip is a chip that sends a switching instruction, the method comprises:

   If a preset trigger condition is met, a switching instruction is sent to the second chip; wherein, the switching instruction carries a switching time point and a target working mode, and the switching instruction is used to instruct the second chip at the switching time Click to switch the current working mode of the second chip to the target working mode;

   Switching the current working mode of the first chip to the target working mode at the switching time point;

   Wherein, the current working mode and the target working mode are two different working modes among the standard working mode and the non-standard working mode.
3. The data transmission method according to claim 1, wherein if the first chip is a chip that receives a switching instruction, the method comprises:

   receiving a switching instruction sent by the second chip when a preset trigger condition is met; wherein, the switching instruction carries a switching time point and a target working mode;

   Switching the current working mode of the first chip to the target working mode at the switching time point;

   Wherein, the second chip switches the current working mode of the second chip to the target working mode at the switching time point;

   The current working mode and the target working mode are two different working modes among the standard working mode and the non-standard working mode.
4. The data transmission method according to claim 2 or 3, wherein one of the two different working modes is the standard working mode.
5. The data transmission method according to any one of claims 2 to 4, wherein the standard channel is set with a number, and the non-standard working mode includes the first working mode and/or the third working mode ;

   If the target working mode is the first working mode, the switching instruction further carries the number of the first fixed channel;

   If the target working mode is the third working mode, the switching instruction further carries the serial number of the second fixed channel; wherein, the extended channel is set with a serial number.
6. The data transmission method according to any one of claims 2 to 4, wherein the non-standard working mode includes the second working mode and/or the third working mode, and the triggering condition includes: determining The first chip is in a state in which a Bluetooth connection has been established with the second chip and a Bluetooth pairing has not been performed;

   The target working mode is the second working mode or the third working mode.
7. The data transmission method according to claim 6, wherein the determining that the first chip is in a state in which a Bluetooth connection has been established with the second chip and has not yet been paired with Bluetooth comprises:

   After the security request is sent to the second chip, and the pairing request sent by the second chip has not been received; or,

   After receiving the security request sent by the second chip, a pairing request has not been sent to the second chip.
8. The data transmission method according to claim 6 or 7, wherein, if the first chip is a chip that sends a switching instruction, after the sending of the switching instruction to the second chip, the method further comprises:

   If it is determined that the Bluetooth pairing with the second chip is completed, a restoration instruction is sent to the second chip; wherein, the restoration instruction carries a restoration time point, and the restoration instruction is used to instruct the second chip at the restoration time Click to restore the target working mode of the second chip to the working mode before switching;

   At the restoration time point, the target working mode of the first chip is restored to the working mode before the switching.
9. The data transmission method according to claim 6 or 7, wherein, if the first chip is a chip that receives a switching instruction, after the receiving of the switching instruction sent by the second chip when a preset trigger condition is satisfied ,Also includes:

   Receive a restoration instruction sent by the second chip after determining that the Bluetooth pairing with the first chip is completed; wherein, the restoration instruction carries a restoration time point;

   restoring the target working mode of the first chip to the working mode before switching at the restoring time point;

   Wherein, the second chip restores the target working mode of the second chip to the working mode before the switching at the restoration time point.
10. The data transmission method according to any one of claims 2 to 9, wherein the non-standard operation mode includes the fourth operation mode; and the trigger condition includes: detecting a transmission with the second chip In the process of data processing, the duration of the RSSI indication RSSI greater than the preset strength threshold is greater than the preset duration threshold, and the packet loss rate within the preset duration threshold is greater than the preset packet loss rate threshold;

    The target working mode is the fourth working mode.
11. The data transmission method according to any one of claims 1 to 10, wherein the non-standard working mode includes the second working mode and/or the fourth working mode, and in the second working mode Or in the fourth working mode, the channel after frequency hopping is determined in the following manner:

    determining a frequency hopping step value according to the access address allocated by the first chip to the second chip;

    The frequency-hopping channel is determined according to the frequency hopping step value and the total number of channels; wherein, the total number of channels is the sum of the number of the standard channels and the number of the extension channels.
12. The data transmission method according to any one of claims 1 to 11, wherein the non-standard working mode comprises any one of the following or a combination thereof: the second working mode, the third working mode, all the the fourth working mode; the standard channel is obtained by dividing the standard frequency band, and the extended channel is obtained by dividing the extended frequency band; the standard frequency band corresponds to an upper limit frequency and a lower limit frequency, and the extended frequency band includes the first frequency band and the third frequency band. Two frequency bands, the frequencies in the first frequency band are all lower than the lower limit frequency, and the frequencies in the second frequency band are all greater than the upper limit frequency.
13. The data transmission method of claim 12, wherein the first frequency band is 2360Mhz to 2400Mhz, and the second frequency band is 2480Mhz to 2520Mhz.
14. The data transmission method according to claim 12 or 13, wherein the number of each standard channel divided based on the standard frequency band is a continuous number, and the continuous number includes an initial number and a termination number;

    The numbers of the channels divided based on the first frequency band, decrease sequentially with the initial number as a reference as the frequency decreases;

    The number of the channel divided based on the second frequency band increases sequentially with the increase of the frequency based on the termination number.
15. The data transmission method according to claim 14, wherein the number of each standard channel is 0 to 39 in sequence with the increase of the frequency, and the number of the channel divided based on the first frequency band increases as the frequency increases. The decreasing order of the frequency is -1 to -20, and the number of the channel divided based on the second frequency band is 40 to 59 in order as the frequency increases.
16. The data transmission method according to any one of claims 1 to 15, wherein the non-standard working mode comprises the first working mode and/or the third working mode;

    If the first chip works in the first working mode, the use status of the first fixed channel is set to allow use, and the use status of other channels in the standard channel except the first fixed channel is set to be disabled;

    If the first chip operates in the third working mode, the use status of the second fixed channel is set to allow use, and the use status of other channels in the extended channel except the second fixed channel is set to be disabled.
17. The data transmission method according to any one of claims 1 to 16, wherein,

    The first chip is arranged in the master device, and the second chip is arranged in the slave device; or,

    The first chip is arranged in the slave device, and the second chip is arranged in the master device.
18. A first chip, characterized in that the first chip is located in an electronic device and is connected to a memory in the electronic device, the memory stores an instruction that can be executed by the first chip, and the instruction is executed by the first chip. The first chip executes to enable the first chip to execute the data transmission method as claimed in any one of claims 1 to 17.
19. An electronic device, comprising: the first chip according to claim 18, and a memory connected to the first chip.
20. A computer-readable storage medium storing a computer program, characterized in that, when the computer program is executed by a processor, the data transmission method according to any one of claims 1 to 17 is implemented.

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