CN113206688B

CN113206688B - Bluetooth communication method and system, and Bluetooth receiving method and device

Info

Publication number: CN113206688B
Application number: CN202110283962.2A
Authority: CN
Inventors: 徐斌
Original assignee: Zgmicro Nanjing Ltd
Current assignee: Zgmicro Nanjing Ltd
Priority date: 2018-02-09
Filing date: 2018-02-09
Publication date: 2022-08-05
Anticipated expiration: 2038-02-09
Also published as: CN108111194B; CN113206688A; CN108111194A

Abstract

A Bluetooth communication method, a Bluetooth communication system, a Bluetooth receiving method and a Bluetooth receiving device are provided, which comprises: the generated Bluetooth data is sent through a plurality of Bluetooth sending branches of different frequency domain channels; receiving Bluetooth data in a plurality of Bluetooth receiving branches through different frequency domain channels; the Bluetooth data comprises cyclic redundancy check information and load data; and determining whether the load data in the multiple Bluetooth receiving branches are retransmitted or not according to the cyclic redundancy check information in the multiple Bluetooth receiving branches, and screening output data from the load data which are not retransmitted. This application is through a plurality of different frequency domain channels receiving/sending bluetooth data, and the effectual bluetooth system retransmission number of times that has reduced is in order to improve communication efficiency, accomplishes the reliable bluetooth information transmission of high quality.

Description

Bluetooth communication method and system, and Bluetooth receiving method and device

The application date of the invention is as follows: the patent application number is 201810134690.8 on 09.2.2018, entitled "Bluetooth communication method, system and Bluetooth receiving method and device", and is a divisional application of Chinese patent application.

Technical Field

The present application relates to the field of bluetooth communication technologies, and in particular, to a bluetooth communication method and system, and a bluetooth receiving method and device.

Background

The wide development of the bluetooth technology enables bluetooth products and services to become a part of life of people, and particularly, voice or audio applications such as bluetooth earphones and bluetooth sound boxes bring great life convenience to people. However, as the demand for voice and audio performance, communication distance, real-time performance, or communication reliability is higher, the shortages in communication distance and reliability of the bluetooth technology, which is designed with low cost and low power consumption as targets, are more and more apparent.

The bluetooth wireless communication system mainly adopts a frequency diversity technology based on an adaptive frequency hopping and automatic retransmission mechanism to resist interference and frequency selective fading. Although the performance of the bluetooth communication system can be greatly improved by adopting the multi-antenna space diversity technology, the multi-antenna is not placed at any place or cannot be subjected to space fading independently so as to be difficult to obtain space diversity gain due to the limitation of space size on a plurality of wearable or portable bluetooth products.

With the development of electronic technology and semiconductor technology, it is possible to improve the efficiency or communication performance of bluetooth communication by using frequency domain multi-channel transmission and multi-channel reception while maintaining low cost and low power consumption, thereby facilitating the multi-channel receiver to be widely used in high-performance bluetooth communication systems, such as smart wireless headsets or other portable products. A common way to implement bluetooth multi-channel transceiving is to install multiple bluetooth transmitters and receivers in parallel in a bluetooth communication system, establish mutually independent links in one-to-one correspondence between the multiple transmitters and receivers, independently hop frequencies, and independently transmit data. However, this method has no centralized control, and it is likely that the transceiving is not synchronized, which results in mutual interference, that is, when this transmitter works, the other receiver works, which results in strong interference and results in reception failure. Moreover, how to coordinate the multiple transceiving channels and how to distribute data is very complicated.

Disclosure of Invention

The embodiment of the application provides a Bluetooth communication method, a Bluetooth communication system, a Bluetooth receiving method and Bluetooth receiving equipment, and aims to solve the technical problem of multiple receiving and transmitting channels of the Bluetooth communication system.

In a first aspect, an embodiment of the present application provides a bluetooth communication method, including the following steps:

sending the generated Bluetooth data through a plurality of Bluetooth sending branches; the frequency domain channels of the Bluetooth sending branches are different;

receiving the Bluetooth data in the multiple Bluetooth receiving branches through a plurality of frequency domain channels corresponding to the frequency domain channels of the Bluetooth sending branches; the Bluetooth data comprises cyclic redundancy check information and load data;

when in a mode, determining whether load data in the multiple Bluetooth receiving branches is retransmitted according to cyclic redundancy check information in the multiple Bluetooth receiving branches;

and screening output data from the load data which is not retransmitted.

In a second aspect, an embodiment of the present application provides a bluetooth communication system, including: the Bluetooth multichannel transmitting equipment comprises a first baseband processor, a plurality of radio frequency transmitters and a transmitting antenna, and the Bluetooth multichannel receiving equipment comprises a multichannel automatic retransmission processor, a plurality of serial second baseband processors, a plurality of serial radio frequency transmitters and a receiving antenna; wherein the content of the first and second substances,

the first baseband processor is used for outputting Bluetooth data;

the plurality of radio frequency transmitters are used for modulating the Bluetooth data to a plurality of different frequency domain channels and transmitting the Bluetooth data to the transmitting antenna;

the receiving antenna is used for receiving the Bluetooth data transmitted by the transmitting antenna;

the plurality of radio frequency receivers are used for converting the received Bluetooth data of different frequency domain channels into baseband signals and processing the baseband signals by a second baseband processor corresponding to each radio frequency receiver;

the multichannel automatic retransmission processor is used for determining whether the load data in the multichannel Bluetooth receiving branches are retransmitted or not according to the cyclic redundancy check information in the multichannel Bluetooth receiving branches when in a mode; and screening output data from the load data which is not retransmitted.

In a third aspect, the present application provides a bluetooth receiving method, including the following steps:

and screening output data from the load data which is not retransmitted.

In a fourth aspect, an embodiment of the present application provides a bluetooth receiving apparatus, including: a multi-channel automatic retransmission processor, a plurality of serial second baseband processors and radio frequency transmitters, and a receiving antenna; wherein the content of the first and second substances,

the receiving antenna is used for receiving Bluetooth data;

the multichannel automatic retransmission processor is used for executing the Bluetooth receiving method.

The beneficial effects are as follows:

the Bluetooth communication method, the Bluetooth communication system and the electronic equipment provided by the embodiment of the application effectively reduce the retransmission times of the Bluetooth system to improve the communication efficiency and finish the high-quality and reliable Bluetooth information transmission by receiving/transmitting the Bluetooth data through a plurality of different frequency domain channels.

Drawings

Specific embodiments of the present application will be described below with reference to the accompanying drawings, in which:

fig. 1 is a schematic flowchart of an implementation of a bluetooth communication method according to embodiment 1 of the present invention;

fig. 2 is a schematic diagram of a retransmission determination process according to embodiment 1 of the present invention;

fig. 3 is a schematic structural diagram of a bluetooth communication system according to embodiment 2 of the present invention.

Detailed Description

In order to make the technical solutions and advantages of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and not an exhaustive list of all embodiments. And the embodiments and features of the embodiments in the present description may be combined with each other without conflict.

The inventor also notes in the course of the invention that:

the bluetooth voice and audio transmission mainly adopts a transmission technology without error correction coding and an error automatic retransmission mechanism based on 16-bit cyclic redundancy check. In increasingly complex interference and fading environments, the number of retransmissions required may be greater, resulting in a reduced effective bandwidth of the asynchronous channel or a greater audio delay, or alternatively, resulting in a limited number of retransmissions of the voice synchronous link that is insufficient to meet the requirements for high quality speech performance. Moreover, the probability that a 16-bit Cyclic Redundancy Check (CRC) results in a correct CRC but actual data error is less and less tolerable relative to the requirements for long reliable transmissions or long voice and audio transmissions.

In view of the defects in the prior art, embodiments of the present application provide a bluetooth communication method, a bluetooth communication system, a bluetooth receiving method, and a bluetooth receiving apparatus, which are described below.

Example 1

Fig. 1 shows a schematic flowchart of an implementation of a bluetooth communication method in an embodiment of the present application, and as shown in the figure, the method includes the following steps:

step 101, transmitting the generated Bluetooth data through a plurality of Bluetooth transmitting branches; the frequency domain channels of the Bluetooth sending branches are different;

102, receiving the Bluetooth data in the multiple Bluetooth receiving branches through a plurality of frequency domain channels corresponding to the frequency domain channels of the Bluetooth sending branches; the Bluetooth data comprises cyclic redundancy check information and load data;

103, determining a current working mode and determining whether load data in the multiple Bluetooth receiving branches are retransmitted or not according to cyclic redundancy check information and/or load data in the multiple Bluetooth receiving branches in the current working mode;

and 104, screening output data from the load data which is not retransmitted.

In specific implementation, the sending end can send out the generated bluetooth data (or called bluetooth signals) through multiple bluetooth sending branches, and frequency domain channels of the bluetooth sending branches are different; the receiving end can receive the Bluetooth data in the multiple Bluetooth receiving branches through different frequency domain channels; the Bluetooth data comprises cyclic redundancy check information and load data, then a current working mode is determined, whether the load data in the multiple Bluetooth receiving branches are retransmitted or not is determined according to the cyclic redundancy check information and/or the load data in the multiple Bluetooth receiving branches in the current working mode, and output data is screened out from the unremitted load data.

The multiple Bluetooth transmitting branches are mutually independent and mutually non-interfering, and the multiple Bluetooth receiving branches are mutually independent and mutually non-interfering.

The frequency domain channels of the Bluetooth receiving branches correspond to the frequency domain channels of the Bluetooth sending branches one by one.

More specifically, each of the bluetooth transmitting branches of this embodiment has the same structure, and includes a radio frequency transmitter, and a plurality of radio frequency transmitters can transmit bluetooth data through a transmitting antenna. Each path of bluetooth receiving branch circuit composition structure of this embodiment is the same, including radio frequency receiver and baseband processor, sends to bluetooth receiving branch circuit after receiving wireless signal by receiving antenna, and the radio frequency receiver in the bluetooth receiving branch circuit carries out the conversion of baseband signal, and baseband processor analyzes the baseband signal, obtains cyclic redundancy check information and load data. And then performing subsequent retransmission analysis through the cyclic redundancy check information and the load data.

Specifically, in step 101, the frequency domain channel of each bluetooth transmission branch is determined according to a value obtained by modulo M by [ M + (i-1) × K ], where M is the frequency domain channel of the first bluetooth transmission branch, M is the total channel number, M may be any integer between 0 and (M-1), i is the ith bluetooth transmission branch, i is greater than or equal to 1 and less than or equal to N, N is the total branch number, K is the maximum integer not greater than M/N, and N is less than M.

Specifically, in step 102, the frequency domain channel of each bluetooth receiving branch is determined according to a value obtained by modulo M by [ M + (j-1) × K ], where M is the frequency domain channel of the first bluetooth receiving branch, M is the total channel number, M may be any integer between 0 and (M-1), j is the jth bluetooth receiving branch, j is greater than or equal to 1 and less than or equal to N, N is the total branch number, K is the maximum integer not greater than M/N, and N is less than M.

For example: assuming that the total number of channels M is 40, the total number of branches N is 6, K is 6, assuming that the frequency domain channel of the first transmitting branch is 1, the frequency domain channel of the second transmitting branch is a value modulo 40 by [1+ (2-1) × 6], i.e. 7, the frequency domain channel of the third transmitting branch is data modulo 40 by [1+ (3-1) × 6], i.e. 13, the frequency domain channel of the fourth transmitting branch is a value modulo 40 by [1+ (4-1) × 6], i.e. 19, the frequency domain channel of the fifth transmitting branch is a value modulo 40 by [1+ (5-1) × 6], i.e. 25, and the frequency domain channel of the sixth transmitting branch is a value modulo 40 by [1+ (6-1) × 6], i.e. 31. Correspondingly, the frequency domain channel of the first receiving branch is 1, the frequency domain channel of the second receiving branch is 7, the frequency domain channel of the third receiving branch is 13, the frequency domain channel of the fourth receiving branch is 19, the frequency domain channel of the fifth receiving branch is 25, and the frequency domain channel of the sixth receiving branch is 31.

In the embodiment, the frequency domain channel can be obtained by calculating according to a Bluetooth adaptive frequency modulation algorithm by a Bluetooth protocol processor; the total channel number M can be determined by a mapping chart of adaptive frequency hopping at the transmitting end and the receiving end, the number of the transmitting branches is the same as that of the receiving branches, and the frequency domain channels are in one-to-one correspondence.

Specifically, the cyclic redundancy check information and the payload data obtained in step S102 are used as important indicators for determining whether the information needs to be retransmitted. In the present embodiment, two alternative retransmission decision processing modes are provided, including a first mode (efficient transmission mode) and a second mode (reliable transmission mode). As shown in fig. 2, in the efficient transmission mode, when the crc information in at least one bluetooth receiving branch is correct, the retransmission is terminated, otherwise, the retransmission is applied until the retransmission is over time or no retransmission times exist. And under the reliable transmission mode, accumulating the correct cyclic redundancy check information in at least two Bluetooth receiving branches, stopping retransmission when the load data in the two Bluetooth receiving branches are completely the same, or else, keeping the load data in the Bluetooth receiving branch with the correct cyclic redundancy check information, comparing the load data with the load data in the Bluetooth receiving branch with the correct cyclic redundancy check information during next retransmission, and applying for retransmission. The above is only a brief overview of the workflow in the following two processing modes, each of which is specifically analyzed below.

Efficient transmission mode: and as long as the cyclic redundancy check information in one Bluetooth receiving branch is correct, retransmission is not required, and the cyclic redundancy check information of all the Bluetooth receiving branches is not correct, retransmission is required. Because of parallel multi-branch reception, the retransmission times are necessarily reduced to improve the transmission efficiency, or the communication quality under the same retransmission times limit is improved.

The above description can be used to obtain the case of no need of retransmission in the efficient transmission mode, including:

when the cyclic redundancy check information in at least one Bluetooth receiving branch is judged to be correct,

or, judging that the cyclic redundancy check information in all the Bluetooth receiving branches is not correct and the retransmission time exceeds the preset retransmission time,

or when the cyclic redundancy check information in all the Bluetooth receiving branches is judged to be incorrect and the residual retransmission times are less than or equal to the preset retransmission times, sending a retransmission stopping request.

The preset retransmission time and the number of retransmissions may be set according to the delay requirement of the specific application, for example: the number of retransmissions for voice transmission is 3, the maximum retransmission time for music playing can be set to 10, the number of retransmissions for link information can be infinite, and the like, which is not limited in the present application.

Correspondingly, the case of requiring retransmission in the efficient transmission mode includes:

judging that the cyclic redundancy check information in all the Bluetooth receiving branches is not correct and the retransmission time does not exceed the preset retransmission time,

or when the cyclic redundancy check information in all the Bluetooth receiving branches is judged to be incorrect and the residual retransmission times are larger than the preset retransmission times, sending a request for applying retransmission.

Reliable transmission mode: and if the cyclic redundancy check information of at least two accumulated Bluetooth receiving branches is correct and the load data comparison is completely the same, stopping retransmission, otherwise, requiring retransmission. The data with correct cyclic redundancy check information and different data contrast is stored, so that the data can be conveniently compared with the load data with correct cyclic redundancy check information received by multiple channels of next retransmission.

The above description can be used to obtain the case that no retransmission is required in the reliable transmission mode, including:

judging that the cyclic redundancy check information in the at least two Bluetooth receiving branches is correct and the load data in the at least two Bluetooth receiving branches are the same,

or, when the cyclic redundancy check information in at least one path of Bluetooth receiving branch is judged to be correct and the retransmission time exceeds the preset retransmission time,

or when the cyclic redundancy check information in at least one path of Bluetooth receiving branch is judged to be correct and the residual retransmission times are less than or equal to the preset retransmission times, sending a retransmission stopping request.

Correspondingly, the case of retransmission in the reliable transmission mode includes:

when the CRC information in at least one Bluetooth receiving branch is judged to be correct and the retransmission time is not preset,

or when the cyclic redundancy check information in at least one path of Bluetooth receiving branch is judged to be correct and the residual retransmission times are larger than the preset retransmission times, the first load data in the Bluetooth receiving branch with the correct cyclic redundancy check information is reserved, and a request for applying retransmission is sent until second load data which is the same as the first load data appears after retransmission, and a request for stopping retransmission is sent.

The second load data is the same load data as the first load data in other Bluetooth receiving branches with correct cyclic redundancy verification information after retransmission.

Specifically, the load data that does not need to be retransmitted has been acquired in step S103 through two processing modes, and the following describes a process of screening out output data from the load data that does not need to be retransmitted.

First, in the efficient transmission mode:

when judging that the cyclic redundancy check information in only one Bluetooth receiving branch is correct, taking the load data in the Bluetooth receiving branch with correct cyclic redundancy check information as output data;

judging that the cyclic redundancy check information in the multiple Bluetooth receiving branches is correct, and selecting the same load data as output data when the load data in at least two Bluetooth receiving branches in the Bluetooth receiving branches with correct cyclic redundancy check information are the same;

and judging that the cyclic redundancy check information in the multiple Bluetooth receiving branches is correct and the load data in the Bluetooth receiving branches with correct cyclic redundancy check information are different, and selecting the load data in the Bluetooth receiving branch with the maximum received signal intensity in the Bluetooth receiving branches with correct cyclic redundancy check information as output data.

Secondly, in the reliable transmission mode:

judging that the cyclic redundancy check information in the at least two Bluetooth receiving branches is correct and the load data in the at least two Bluetooth receiving branches are the same, and taking the same load data as output data;

when judging that the cyclic redundancy check information in at least one path of Bluetooth receiving branch is correct and the retransmission time exceeds the preset retransmission time, or judging that the cyclic redundancy check information in at least one path of Bluetooth receiving branch is correct and the residual retransmission times are less than or equal to the preset retransmission times, if the cyclic redundancy check information in only one path of Bluetooth receiving branch is correct, taking the load data in the Bluetooth receiving branch with the correct cyclic redundancy check information as output data;

when judging that the cyclic redundancy check information in the two Bluetooth receiving branches is correct and the retransmission time exceeds the preset retransmission time, or judging that the cyclic redundancy check information in the two Bluetooth receiving branches is correct and the residual retransmission times are less than or equal to the preset retransmission times, if the load data in the two Bluetooth receiving branches are different, selecting the load data in the Bluetooth receiving branch with high received signal intensity as output data;

when the cyclic redundancy check information in the more than two Bluetooth receiving branches is judged to be correct and the retransmission time exceeds the preset retransmission time, or the cyclic redundancy check information in the more than two Bluetooth receiving branches is judged to be correct and the residual retransmission times are smaller than or equal to the preset retransmission times, if the load data in the more than two Bluetooth receiving branches are different, the load data in the three Bluetooth receiving branches with the highest received signal intensity is selected from the more than two Bluetooth receiving branches to carry out 1/3 decoding, and the result is the output data.

The 1/3 decoding operation principle is as follows: three identically located bits are compared and 2 or 3 identical bits are selected as the correct result.

The above processes complete the output data screening in different processing modes, and the output data is sent to the Bluetooth protocol processor for subsequent processing after being determined. All retransmission judgment processes are finished.

The Bluetooth communication method provided by the embodiment of the application can receive and transmit Bluetooth data through a plurality of different frequency domain channels, and the embodiment of the application provides a retransmission checking mechanism under different working modes, so that the retransmission times of a Bluetooth system are effectively reduced, the communication efficiency is improved, and high-quality and reliable Bluetooth information transmission is completed.

Example 2

Fig. 3 shows a bluetooth communication system in an embodiment of the present application, including: the Bluetooth multichannel transmitting equipment comprises a first baseband processor, a plurality of radio frequency transmitters and a transmitting antenna, and the Bluetooth multichannel receiving equipment comprises a multichannel automatic retransmission processor, a plurality of serial second baseband processors, a plurality of serial radio frequency transmitters and a receiving antenna; wherein the content of the first and second substances,

the first baseband processor is used for outputting Bluetooth data;

the multi-channel automatic retransmission processor is used for determining that the current working mode is a first mode or a second mode; in the first mode, determining whether load data in the multiple Bluetooth receiving branches is retransmitted according to cyclic redundancy check information in the multiple Bluetooth receiving branches; in the second mode, whether the load data in the multiple Bluetooth receiving branches are retransmitted or not is determined according to the cyclic redundancy check information and/or the load data in the multiple Bluetooth receiving branches; and screening output data from the load data which is not retransmitted.

Specifically, the bluetooth multi-channel transmitting device in this embodiment may be similar to the bluetooth single-channel transmitter in the prior art, and may include the same bluetooth protocol processor, baseband processor, radio frequency transmitter and antenna, except that at least one or more radio frequency transmitters are added. The Bluetooth protocol processor is used for scheduling and transmitting synchronous words, transmitting frequency, packet types and time slots which are the same as those of the single-channel transmitter, transmitting the transmitted data to the baseband processor, and the baseband processor is used for simultaneously transmitting the processed completely same data packets to the plurality of radio frequency transmitters and controlling the plurality of radio frequency transmitters to be simultaneously started up. The added radio frequency transmitters transmit data or signals in the same mode as the radio frequency transmitters in the prior art, the data or signals are generated by the same baseband processor, only the transmitting frequency or the transmitting channel is different among the radio frequency transmitters, and the radio frequency signals of the radio frequency transmitters finally transmit the signals through the same antenna.

These radio frequency transmitters may share the same analog baseband circuitry, power amplifiers, etc. However, due to the difference in transmission frequency or channel, each rf transmitter may employ a separate frequency synthesizer or phase locked loop. One of the plurality of rf transmitters may use the same frequency or channel generated by the baseband processor as the single-channel transmitter. The frequencies or channels of other radio frequency transmitters may be generated by the following method:

dividing the number M of available channels in Adaptive Frequency Hopping (AFH) by the number N of radio Frequency transmitters (N < M), and taking the maximum integer K not greater than M/N as the channel interval of each radio Frequency channel. The available channels are rearranged from low to high to 0 to M-1, and the channel generated by the baseband processor is set to M, then the channel of the radio frequency transmitter 1 is set to M, and the channel of the radio frequency transmitter n is set to M + (n-1) × K modulo M. In this way, it is ensured that the selected N channels are sufficiently separated in the frequency domain to obtain a frequency diversity gain.

Before the transmitting antenna sends the Bluetooth signal, the transmitting antenna schedules a transmitting synchronous word, a transmitting frequency, a packet type and a time slot which are the same as those of a single-channel transmitter through a Bluetooth protocol processor, and sends the Bluetooth data to a baseband processor, and the baseband processor simultaneously sends the processed completely same data packet to a plurality of radio frequency transmitters and controls the radio frequency transmitters to be simultaneously started up to work. Radio frequency signals of the plurality of radio frequency transmitters are transmitted through a common antenna.

Specifically, the bluetooth multichannel receiving device in this embodiment may include an antenna, a plurality of parallel radio frequency receivers, a plurality of baseband processors corresponding to the plurality of radio frequency receivers one to one, a multichannel automatic retransmission processor, and a bluetooth protocol processor. Compared with the single-channel Bluetooth receiver in the prior art, the radio frequency receiver and the baseband processor are independent branches, a multi-channel automatic retransmission processor is added, and all other units including the Bluetooth protocol processor can be the same. The Bluetooth data of different frequency domain channels are sent to each Bluetooth receiving branch through a receiving antenna and processed by a baseband processor, the multi-channel automatic retransmission processor is connected with the Bluetooth protocol processor, and the Bluetooth protocol processor is used for receiving output data sent by the multi-channel automatic retransmission processor. The bluetooth protocol processor may set the reception channel, the synchronization code, and the reception time according to the calculated frequency before the multi-channel receiver receives data.

Before the Bluetooth receiving branch receives the wireless signals, the Bluetooth protocol processor also sets a receiving channel, a synchronous code and receiving time according to the frequency calculated by the frequency modulation algorithm. After being received by a receiving antenna, the wireless signals are respectively processed into baseband signals by a radio frequency receiver, and then the baseband signals are analyzed to obtain cyclic redundancy check information and load data by a baseband processor, and then the cyclic redundancy check information and the load data are sent to a multi-channel automatic retransmission processor for further retransmission judgment processing.

The multi-channel automatic retransmission processor of this embodiment is provided with two operating modes, wherein one operating mode is a high-efficiency transmission mode, and the other operating mode is a reliable transmission mode.

When the retransmission processor is set to be in a high-efficiency transmission mode, judging whether the cyclic redundancy check information of at least one path in the multiple paths of Bluetooth receiving branches is correct:

and if the cyclic redundancy check information of all the Bluetooth receiving branches is incorrect and the retransmission is judged not to be overtime or the number of the residual retransmission times, applying for the retransmission through the Bluetooth protocol processor.

And if the cyclic redundancy check information of all the Bluetooth receiving branches is incorrect and the retransmission is overtime or has no retransmission times, stopping retransmission and performing subsequent processing through a Bluetooth protocol processor.

And if only the cyclic redundancy check information of one path of Bluetooth receiving branch passes, the load data of the path of Bluetooth receiving branch is sent to the Bluetooth protocol processor as a final result to be processed and the retransmission is stopped.

If the cyclic redundancy information of the multiple Bluetooth receiving branches is correct and the load data of at least two Bluetooth receiving branches are the same, the same load data is selected as output data to be sent to the Bluetooth protocol processor for processing and the retransmission is stopped.

And if the load data in the Bluetooth receiving branches with correct cyclic redundancy check information are different, selecting the load data in one Bluetooth receiving branch with the maximum received signal intensity and correct cyclic redundancy check information as output data, sending the output data to the Bluetooth protocol processor for processing, and stopping retransmission.

When the retransmission processor is set to be in a reliable transmission mode, judging whether the accumulated cyclic redundancy check information of at least two Bluetooth receiving branches passes through and the load data is the same (the accumulated meaning is that all Bluetooth receiving branches with correct accumulated cyclic redundancy check information in the process of multiple retransmissions):

and when the cyclic redundancy check information of the at least two Bluetooth receiving branches passes and the load data is the same, sending the same load data as output data to a Bluetooth protocol processor for processing, and stopping retransmission.

When the cyclic redundancy check information of the two Bluetooth receiving branches does not pass and the load data are the same, and the retransmission is judged to be not overtime or the number of the residual retransmission times, the load data in the Bluetooth receiving branch with correct cyclic redundancy check information is reserved, the load data in the Bluetooth receiving branch with correct cyclic redundancy check information is compared with the load data in the Bluetooth receiving branch with correct cyclic redundancy check information received in the next retransmission, and the retransmission is applied through the Bluetooth protocol processor.

And when the cyclic redundancy check information of the two Bluetooth receiving branches does not pass and the load data is the same, judging whether the retransmission is overtime or has no retransmission times, if only one path of cyclic redundancy check information is correct, sending the load data of the path of Bluetooth receiving branch as output data to a Bluetooth protocol processor for processing, and stopping the retransmission.

And when the cyclic redundancy check information of the two accumulated Bluetooth receiving branches passes and the load data is the same, judging whether the retransmission is overtime or has no retransmission times, if the cyclic redundancy check information of the two accumulated Bluetooth receiving branches is correct, selecting the load data of one Bluetooth receiving branch with the maximum received signal intensity and correct cyclic redundancy check information as output data, delivering the output data to a Bluetooth protocol processor for processing, and stopping the retransmission.

When the cyclic redundancy check information of the two Bluetooth receiving branches does not pass and the load data is the same, whether retransmission is overtime or the retransmission times is not determined, if more than three accumulated cyclic redundancy check information is correct, the load data of the three Bluetooth receiving branches with the maximum received signal intensity and correct cyclic redundancy check information is selected to be 1/3 decoded, the decoded result is used as output data to be sent to the Bluetooth protocol processor to be processed, and retransmission is stopped.

In the embodiment of the present application, in order to distinguish between the bluetooth protocol processor and the baseband processor at the transmitting end and the receiving end, the nomenclature thereof is distinguished as first and second in the claim part, but the nomenclature is not required to be so named in the specific implementation, and the nomenclature should not limit the scope of the present application.

According to the Bluetooth communication system provided by the embodiment of the application, the Bluetooth multichannel sending equipment and the Bluetooth multichannel receiving equipment can work as a single-channel mode and can also work in a multichannel mode, and the single-channel mode or the multichannel mode can normally work together with the Bluetooth receiver and the Bluetooth transmitter in the prior art, namely, a link is normally established and data are transmitted, and the compatibility between the Bluetooth communication system and any Bluetooth equipment of a third party is not influenced. That is, even when connected to a third party bluetooth device in a multi-channel mode, it is the same as a single channel in terms of operation, function, performance, and compatibility.

According to the Bluetooth communication system provided by the embodiment of the application, if the multichannel transmitting equipment and the multichannel receiving equipment work in a multichannel mode, the communication efficiency, the communication performance or the communication reliability can be greatly improved.

Example 3

The embodiment of the application provides a Bluetooth receiving method, which comprises the following steps:

determining that the current working mode is a first mode or a second mode;

in the first mode, determining whether load data in the multiple Bluetooth receiving branches is retransmitted according to cyclic redundancy check information in the multiple Bluetooth receiving branches;

in the second mode, whether the load data in the multiple Bluetooth receiving branches are retransmitted or not is determined according to the cyclic redundancy check information and/or the load data in the multiple Bluetooth receiving branches;

and screening output data from the load data which is not retransmitted.

In implementation, the frequency domain channel of each bluetooth receiving branch is determined according to a value obtained by modulo M by [ M + (j-1) × K ], where M is the frequency domain channel of the first bluetooth receiving branch, M is the total channel number, M is greater than or equal to 0 and less than M, j is the jth bluetooth receiving branch, j is greater than or equal to 1 and less than or equal to N, N is the total branch number, K is the maximum integer not greater than M/N, and N is less than M.

In the implementation, in the first mode, determining whether the load data in the multiple bluetooth receiving branches is retransmitted according to cyclic redundancy check information in the multiple bluetooth receiving branches specifically includes:

when the cyclic redundancy check information in at least one Bluetooth receiving branch is correct,

or, when the cyclic redundancy check information in each Bluetooth receiving branch is not correct and the retransmission time exceeds the preset retransmission time,

or, when the cyclic redundancy check information in each path of Bluetooth receiving branch is not correct and the remaining retransmission times are less than or equal to the preset retransmission times, determining not to retransmit the load data.

when the cyclic redundancy check information in each Bluetooth receiving branch is not correct and the retransmission time does not exceed the preset retransmission time,

or, when the cyclic redundancy check information in each path of Bluetooth receiving branch is not correct and the residual retransmission times are greater than the preset retransmission times, determining to retransmit the load data.

In the implementation, in the first mode, the screening of the output data from the non-retransmitted payload data specifically includes:

when the cyclic redundancy check information in one Bluetooth receiving branch is correct, taking the load data in the Bluetooth receiving branch with the correct cyclic redundancy check information as output data;

when the cyclic redundancy check information in each Bluetooth receiving branch is correct and the load data in at least two Bluetooth receiving branches in the Bluetooth receiving branches with correct cyclic redundancy check information are the same, taking the same load data as output data;

and when the cyclic redundancy check information in each Bluetooth receiving branch is correct and the load data in the Bluetooth receiving branches with correct cyclic redundancy check information are different, taking the load data in the Bluetooth receiving branches with correct cyclic redundancy check information and the Bluetooth receiving branches with the maximum received signal intensity as output data.

In the implementation, in the second mode, determining whether the load data in the multiple bluetooth receiving branches is retransmitted according to cyclic redundancy check information and/or the load data in the multiple bluetooth receiving branches specifically includes:

when the cyclic redundancy check information in the at least two Bluetooth receiving branches is correct and the load data in the at least two Bluetooth receiving branches are the same,

or, when the cyclic redundancy check information in at least one path of Bluetooth receiving branch is correct and the retransmission time exceeds the preset retransmission time,

or when the cyclic redundancy check information in at least one path of Bluetooth receiving branch is correct and the residual retransmission times are less than or equal to the preset retransmission times, determining not to retransmit the load data.

when the cyclic redundancy check information in at least one Bluetooth receiving branch is correct and the retransmission time does not exceed the preset retransmission time,

or when the cyclic redundancy check information in at least one path of Bluetooth receiving branch is correct and the remaining retransmission times are greater than the preset retransmission times, determining to retransmit the load data, and reserving the first load data in the Bluetooth receiving branch with the correct cyclic redundancy check information until a retransmission stop request is sent when second load data identical to the first load data appears after the retransmission, wherein the second load data is the load data identical to the first load data in other Bluetooth receiving branches with the correct cyclic redundancy check information appearing after the retransmission.

In the implementation, in the second mode, the screening of the output data from the non-retransmitted payload data specifically includes:

when the cyclic redundancy check information in the at least two Bluetooth receiving branches is correct and the load data in the at least two Bluetooth receiving branches are the same, taking the same load data as output data;

when the cyclic redundancy check information in at least one path of Bluetooth receiving branch is correct and the retransmission time exceeds the preset retransmission time, or the cyclic redundancy check information in at least one path of Bluetooth receiving branch is correct and the residual retransmission times are less than or equal to the preset retransmission times, if the cyclic redundancy check information in only one path of Bluetooth receiving branch is correct, the load data in the Bluetooth receiving branch with the correct cyclic redundancy check information is used as output data;

when the cyclic redundancy check information in the two Bluetooth receiving branches is correct and the retransmission time exceeds the preset retransmission time, or the cyclic redundancy check information in the two Bluetooth receiving branches is correct and the residual retransmission times are judged to be less than or equal to the preset retransmission times, if the load data in the two Bluetooth receiving branches are different, the load data in the Bluetooth receiving branch with high received signal intensity is selected as output data in the two Bluetooth receiving branches;

when the cyclic redundancy check information in the more than two bluetooth receiving branches is correct and the retransmission time exceeds the preset retransmission time, or the cyclic redundancy check information in the more than two bluetooth receiving branches is correct and the remaining retransmission times are judged to be less than or equal to the preset retransmission times, if the load data in the more than two bluetooth receiving branches are different, the load data in the three bluetooth receiving branches with the maximum received signal intensity is selected to be 1/3 decoded as output data.

Example 4

The embodiment of the application provides a bluetooth multichannel transmitting device, the transmitting device can include: a first bluetooth protocol processor, a first baseband processor, a transmit antenna, and a plurality of radio frequency transmitters in parallel, wherein,

one end of the radio frequency transmitter is connected with the transmitting antenna, the other end of the radio frequency transmitter is connected with the first baseband processor, and the other end of the first baseband processor is connected with the first Bluetooth protocol processor;

the bluetooth signals of the plurality of radio frequency transmitters are generated by the first baseband processor and transmitted through the transmitting antenna, and transmission channels are different among the radio frequency transmitters.

In specific implementation, the number of the radio frequency transmitters can be 1-N, and N is a positive integer.

The first baseband processor may be connected to the rf transmitter 1, the rf transmitter 2, and the rf transmitter …, and the other end of the rf transmitter 1, the rf transmitter 2, and the other end of the rf transmitter … are connected to the transmitting antenna.

Each radio frequency transmitter can transmit the bluetooth signals or data processed by the second baseband processor through different communication channels through the transmitting antenna.

The transmitting antenna may be the same as an antenna responsible for transmitting a bluetooth signal in an existing bluetooth communication system, the radio frequency transmitter may also have the same functions as those in the prior art except that the communication channels are different, the signal processing function of the first baseband processor may also be the same as that of the existing baseband processor, the control or signal processing function of the first bluetooth protocol processor may also be the same as those in the prior art, details of implementation of these functions may refer to implementation of the prior art, and details of implementation of these functions are not described herein.

The bluetooth multichannel transmitting device that this application embodiment provided, a plurality of radio frequency transmitter one end are connected with bluetooth protocol processor through unified baseband processor, the other end is connected with unified transmitting antenna, do not need a plurality of transmitting antenna, the space has been saved, thereby under the different prerequisite that has improved bluetooth communication efficiency in radio frequency transmitter channel, because radio frequency transmitter does not need to receive the receiver one-to-one of equipment with the bluetooth multichannel, so avoided the asynchronous problem that leads to the reception failure of receiving and dispatching.

In implementation, a transmission channel of the radio frequency transmitter is a value obtained by modulo M + (i-1) × K, where M is a frequency domain channel of a first branch generated by the first baseband processor, i is the ith radio frequency transmitter, i is greater than or equal to 1 and less than or equal to N, N is the total number of branches, M is the total number of channels, M is any integer between 0 and (M-1), K is the maximum integer not greater than M/N, and N < M.

For example: the channel of the rf receiver 1 may be M, the channel of the rf receiver 2 may be (M + K) modulo the result value of M, the channel of the rf receiver 3 may be (M + 2K) modulo the result value of M, and the channel of the rf receiver N may be set to [ M + (N-1) K ] modulo M.

In an implementation, the bluetooth multi-channel transmitting device may be a mobile terminal (e.g., a mobile phone, an iPad, a smart speaker, a headset, or the like) or a computer (e.g., a PC, a desktop, a tablet, or the like).

Example 5

The embodiment of the application provides a bluetooth receiving equipment, includes: a multi-channel automatic retransmission processor, a plurality of serial second baseband processors and radio frequency transmitters, and a receiving antenna; wherein the content of the first and second substances,

the receiving antenna is used for receiving Bluetooth data;

the plurality of radio frequency receivers are used for converting the received Bluetooth data of different frequency domain channels into baseband signals and processing the baseband signals by the second baseband processor corresponding to each radio frequency receiver;

the multichannel automatic retransmission processor is used for executing the Bluetooth receiving method in embodiment 3.

Example 6

The embodiment of the application provides a bluetooth multichannel receiving equipment, includes: a second Bluetooth protocol processor, a receive antenna, a plurality of RF receivers in parallel, and a plurality of second baseband processors in series with the RF receivers, wherein,

one end of the radio frequency receiver is connected with the second baseband processor, the other end of the radio frequency receiver is connected with the receiving antenna, and the other end of the second baseband processor is connected with the second Bluetooth protocol processor;

the radio frequency receivers receive the Bluetooth signals from the receiving antenna and send the Bluetooth signals to the corresponding second baseband processors, and receiving channels among the radio frequency receivers are different.

The multichannel automatic retransmission processor is used for requesting retransmission of the Bluetooth signals under the condition that a preset condition is met; the other end of the baseband processor is connected with the second Bluetooth protocol processor, namely, the other end of the second baseband processor is connected with one end of the multi-channel automatic retransmission processor, and the other end of the multi-channel automatic retransmission processor is connected with the second Bluetooth protocol processor.

In order to ensure that an error automatic retransmission mechanism is realized in the process of transmitting data by the Bluetooth, the embodiment of the application is provided with the multi-channel automatic retransmission processor, and the multi-channel automatic retransmission processor can perform CRC (cyclic redundancy check) on the Bluetooth signals or data processed by each second baseband processor, so that the error probability of the Bluetooth data is reduced.

In specific implementation, the number of the radio frequency receivers may be 1 to N, the number of the second baseband processors may be 1 to N, and N is a positive integer.

The radio frequency receiver 1 may be connected to a second baseband processor 1;

the radio frequency receiver 2 may be connected to a second baseband processor 2;

…

the radio frequency receiver N can be connected with a second baseband processor N;

the radio frequency receiver 1, the radio frequency receiver 2, … and the radio frequency receiver N are all connected with a receiving antenna;

the second baseband processor 1, the second baseband processor 2, and the second baseband processor N … are all connected to the second bluetooth protocol processor.

Each radio frequency receiver can acquire Bluetooth signals from the receiving antenna through different communication channels and send the Bluetooth signals to the corresponding second baseband processor for signal processing, and finally, signals or data processed by all the second baseband processors are controlled or processed by the second Bluetooth protocol processor.

The receiving channel of the radio frequency receiver can be a value obtained by performing modulo on M by [ M + (j-1) × K ], wherein M is a frequency domain channel of a first branch generated by the second baseband processor, j is a jth radio frequency receiver, j is more than or equal to 1 and less than or equal to N, N is the total number of branches, M is the total number of channels, M is any integer between 0 and (M-1), K is the maximum integer not more than M/N, and N is less than M.

The receiving antenna may be similar to an antenna in the existing bluetooth communication system, which is responsible for receiving bluetooth signals, the radio frequency receiver may also have the same functions as those in the prior art except that the communication channels are different, the signal processing function of the second baseband processor may also be the same as those in the prior art, the control or processing function of the second bluetooth protocol processor may also be the same as those in the prior art, details of the implementation of these functions may refer to the implementation of the prior art, and details of the implementation of these functions are not described herein.

The bluetooth multichannel receiving equipment that this application embodiment provided, a plurality of radio frequency receiver one end that correspond to establish ties and have the baseband processor is connected with unified bluetooth protocol treater, the other end is connected with unified receiving antenna, thereby do not need a plurality of receiving antenna, the space has been saved, moreover, thereby under the different prerequisite that has improved bluetooth communication efficiency in the radio frequency receiver channel, because the radio frequency receiver need not correspond with communication terminal's transmitter one-to-one, so avoided the asynchronous problem that leads to the receiving failure of receiving and dispatching.

Specifically, the request for retransmission of the bluetooth signal by the multi-channel automatic retransmission processor when the preset condition is met may be: and when the received Bluetooth signal of at least one branch passes CRC detection, ending retransmission, otherwise, requesting retransmission until retransmission timeout or retransmission times are 0.

In the embodiment of the application, after receiving Bluetooth data or signals through a plurality of channels, the Bluetooth data or signals are processed by a second baseband processor and then transmitted to a multi-channel automatic retransmission processor, the multi-channel automatic retransmission processor performs CRC (cyclic redundancy check) on the Bluetooth data received by each branch (or each channel), and when the CRC of at least one branch is correct, the embodiment of the application can consider that the data is successfully received and correct without retransmission; otherwise, whether the remaining retransmission times are more than 0 needs to be further judged, if so, the retransmission can be requested, and at the moment, the retransmission is requested, the available retransmission times are reduced by 1, and the next retransmission data is waited to be received; if the number of retransmissions left is equal to 0, it indicates that there is no opportunity to request retransmission and the retransmission is finished.

The embodiment of the application provides the efficient transmission mode, and the high verification efficiency and the improved communication efficiency are ensured while the multi-channel data are verified.

Specifically, the request for retransmission of the bluetooth signal by the multi-channel automatic retransmission processor when the preset condition is met may further be: and finishing retransmission when the received Bluetooth signals of at least two accumulated branches pass CRC detection and the Bluetooth signals are the same, otherwise, requesting retransmission.

After receiving Bluetooth data or signals through a plurality of channels, the embodiment of the application transmits the signals to a multi-channel automatic retransmission processor after being processed by a second baseband processor, the multi-channel automatic retransmission processor performs CRC (cyclic redundancy check) on the Bluetooth data received by each branch (or called each channel), and when the CRC of the accumulated data of not less than two branches is correct and the data comparison ratio is the same, the embodiment of the application can consider that the data is successfully received and correct without retransmission; otherwise, whether the remaining retransmission times are more than 0 needs to be further judged, if so, the retransmission can be requested, and at the moment, the retransmission is requested, the available retransmission times are reduced by 1, and the next retransmission data is waited to be received; if the number of retransmissions left is equal to 0, it indicates that there is no opportunity to request retransmission and the retransmission is finished.

The embodiment of the application provides the reliable transmission mode, compared with the high-efficiency transmission mode, the reliability is higher, and the correctness or the accuracy of multi-channel data can be further ensured.

More specifically, after receiving bluetooth data or signals through a plurality of channels, the embodiments of the present application transmit the bluetooth data or signals to a multi-channel automatic retransmission processor after being processed by a second baseband processor, and the multi-channel automatic retransmission processor performs CRC check on the bluetooth data received by each branch (or each channel), and when CRC check on data accumulated in not less than two branches is correct and data comparison ratios are the same, the embodiments of the present application can consider that the data reception is successful and correct, and retransmission is not required; otherwise, whether the remaining retransmission times are more than 0 needs to be further judged, if so, the retransmission can be requested, at this time, the data which passes the CRC check or is checked correctly can be stored, the retransmission is requested, the available retransmission times are reduced by 1, and the data of the next retransmission is waited to be received; if the number of retransmissions left is equal to 0, it indicates that there is no opportunity to request retransmission and the retransmission is finished.

The embodiment of the application provides the reliable transmission mode, compared with the efficient transmission mode, the reliable transmission mode is higher in reliability, the correctness or accuracy of multi-channel data can be further ensured, and data basis can be provided for subsequent verification.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

Claims

1. A bluetooth communication method, comprising the steps of:

the generated same Bluetooth data is sent through a plurality of Bluetooth sending branches; the frequency domain channels of the Bluetooth sending branches are different;

the output data is screened out among the payload data not retransmitted,

when in the one mode, determining whether the load data in the multiple bluetooth receiving branches is retransmitted according to the cyclic redundancy check information in the multiple bluetooth receiving branches, specifically including:

2. The method of claim 1, wherein the frequency domain channel of each bluetooth transmitting branch is determined according to a value obtained by modulo M by [ M + (i-1) × K ], where M is the frequency domain channel of the first bluetooth transmitting branch, M is the total number of channels, M is greater than or equal to 0 and less than M, i is the ith bluetooth transmitting branch, i is greater than or equal to 1 and less than or equal to N, N is the total number of branches, K is the largest integer not greater than M/N, and N is less than M.

3. The method of claim 1, wherein the frequency domain channels of each bluetooth receiving branch are determined according to a value obtained by modulo M by [ M + (j-1) × K ], where M is the frequency domain channel of the first bluetooth receiving branch, M is the total number of channels, M is greater than or equal to 0 and less than M, j is the jth bluetooth receiving branch, j is greater than or equal to 1 and less than or equal to N, N is the total number of branches, K is the largest integer not greater than M/N, and N is less than M.

4. The method of claim 1, wherein in the one mode, determining whether the payload data in the multiple bluetooth receiving branches is retransmitted according to cyclic redundancy check information in the multiple bluetooth receiving branches comprises:

5. The method of claim 1, wherein in one mode, screening out output data from non-retransmitted payload data comprises:

6. The method of claim 1, further comprising:

and when in the other mode, determining whether the load data in the multiple Bluetooth receiving branches is retransmitted according to the cyclic redundancy check information and/or the load data in the multiple Bluetooth receiving branches.

7. The method as claimed in claim 6, wherein when in the other mode, determining whether the payload data in the multiple bluetooth receiving branches is retransmitted according to the cyclic redundancy check information and/or the payload data in the multiple bluetooth receiving branches comprises:

8. The method as claimed in claim 6, wherein, when in the other mode, determining whether the payload data in the multiple bluetooth receiving branches is retransmitted according to the cyclic redundancy check information and/or the payload data in the multiple bluetooth receiving branches specifically comprises:

9. The method of claim 7, wherein in the other mode, the screening of the output data from the non-retransmitted payload data comprises:

10. A bluetooth communication system, comprising: the Bluetooth multichannel transmitting equipment comprises a first baseband processor, a plurality of radio frequency transmitters and a transmitting antenna, and the Bluetooth multichannel receiving equipment comprises a multichannel automatic retransmission processor, a plurality of serial second baseband processors, a plurality of radio frequency receivers and a receiving antenna; wherein the content of the first and second substances,

the first baseband processor is used for outputting Bluetooth data;

the plurality of radio frequency transmitters are used for modulating the same Bluetooth data to a plurality of different frequency domain channels and transmitting the same Bluetooth data to the transmitting antenna;

the plurality of radio frequency receivers are used for converting the received Bluetooth data of different frequency domain channels into baseband signals and processing the baseband signals by a second baseband processor corresponding to each radio frequency receiver, and the Bluetooth data comprises cyclic redundancy check information and load data;

the multichannel automatic retransmission processor is used for determining whether load data in the multichannel Bluetooth receiving branches are retransmitted or not according to cyclic redundancy check information in the multichannel Bluetooth receiving branches when in a mode; the output data is screened out among the payload data not retransmitted,

in one mode, determining whether the load data in the multiple bluetooth receiving branches is retransmitted according to the cyclic redundancy check information in the multiple bluetooth receiving branches, specifically including:

11. The bluetooth communication system according to claim 10, wherein the multi-channel automatic retransmission processor is configured to determine whether the payload data in the multi-path bluetooth receiving branch is retransmitted based on the cyclic redundancy check information and/or the payload data in the multi-path bluetooth receiving branch while in another mode.

12. A bluetooth receiving method, comprising the steps of:

receiving the same Bluetooth data in the multiple Bluetooth receiving branches through a plurality of frequency domain channels corresponding to the frequency domain channels of the Bluetooth sending branches; the Bluetooth data comprises cyclic redundancy check information and load data;

the output data is screened out among the payload data not retransmitted,

13. The method of claim 12, further comprising:

14. The method of claim 12, wherein the frequency domain channels of each bluetooth receiving branch are determined according to a value obtained by modulo M by [ M + (j-1) × K ], where M is the frequency domain channel of the first bluetooth receiving branch, M is the total number of channels, M is greater than or equal to 0 and less than M, j is the jth bluetooth receiving branch, j is greater than or equal to 1 and less than or equal to N, N is the total number of branches, K is the largest integer not greater than M/N, and N is less than M.

15. The method as claimed in claim 12, wherein, in the one mode, determining whether the payload data in the multiple bluetooth receiving branches is retransmitted according to the cyclic redundancy check information in the multiple bluetooth receiving branches, specifically comprises:

when the cyclic redundancy check information in at least one path of Bluetooth receiving branch is correct, or when the cyclic redundancy check information in each path of Bluetooth receiving branch is not correct and the retransmission time exceeds the preset retransmission time, or when the cyclic redundancy check information in each path of Bluetooth receiving branch is not correct and the residual retransmission times are less than or equal to the preset retransmission times, determining not to retransmit the load data;

and when the cyclic redundancy check information in each Bluetooth receiving branch is not correct and the retransmission time does not exceed the preset retransmission time, or when the cyclic redundancy check information in each Bluetooth receiving branch is not correct and the residual retransmission times are greater than the preset retransmission times, determining to retransmit the load data.

16. The method according to claim 13, wherein when in the another mode, determining whether the payload data in the multiple bluetooth receiving branches is retransmitted according to cyclic redundancy check information and/or payload data in the multiple bluetooth receiving branches specifically comprises:

when the cyclic redundancy check information in the at least two Bluetooth receiving branches is correct and the load data in the at least two Bluetooth receiving branches are the same, or when the cyclic redundancy check information in the at least one Bluetooth receiving branch is correct and the retransmission time exceeds the preset retransmission time, or when the cyclic redundancy check information in the at least one Bluetooth receiving branch is correct and the remaining retransmission times are less than or equal to the preset retransmission times, determining not to retransmit the load data;

when the cyclic redundancy check information in at least one path of Bluetooth receiving branch is correct and the retransmission time does not exceed the preset retransmission time, or when the cyclic redundancy check information in at least one path of Bluetooth receiving branch is correct and the remaining retransmission times are greater than the preset retransmission times, determining to retransmit the load data, and reserving the first load data in the Bluetooth receiving branch with the correct cyclic redundancy check information, and sending a retransmission stop request until second load data which is the same as the first load data appears after retransmission, wherein the second load data is the load data which is the same as the first load data in other Bluetooth receiving branches with the correct cyclic redundancy check information appearing after retransmission.

17. A bluetooth receiving device, comprising: the multi-channel automatic retransmission processor, a plurality of serial second baseband processors, a plurality of radio frequency receivers and a receiving antenna; wherein the content of the first and second substances,

the receiving antenna is used for receiving Bluetooth data;

the multi-channel automatic retransmission processor is configured to perform the method of any of the claims 12 to 16.